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TECHNICAL
MANUAL
Floor Mounted Models :
DPA 661BS, 1052BS, 1322BS, 1983BS, 2642S
DPW 661AS, 1322AS, 1983AS
DPAY 1321S, 1982S
DPAP 661S, 1052S, 1322S, 1983S
DPAN 661S, 1052S, 1322S, 1983S
Floor Mounted Packaged Airconditioners
&
Ducted Split Airconditioners
Ducted Split Models :
DSA 361D, 601D, 903B, 661DS, 1001BS,
1052BS, 1322DS, 2642S
DSW 361, 661S, 1052S, 1322S
High Efficiency
High Performance
First published June 2006
No part of this publication may be reproduced in any
manner whatsoever without permission in writing from the
Sr. General Manager, Packaged Airconditioning Division,
Blue Star Limited.
While due care has been taken to avoid errors or misinterpretation,
Blue Star Limited is neither liable nor responsible for consequence
of any action taken, on the basis of this publication.
Since ASHRAE standards use the FPS system, FPS nomenclature
is used in some places in this publication for convenient reference.
Published by Blue Star Limited,
9, Bazullah Road, T’Nagar, Chennai 600 017, India.
For restricted circulation only. Not for sale.
TECHNICAL MANUAL
1
Contents
Basics ....................................................................................... 2
What is airconditioning? 2
What is a Packaged Airconditioner? 3
Main Components 4
General layout of components
within the IDU 4
What is a Split Airconditioner? 5
What is a Ducted Split Airconditioner? 5
HiPer+ Packaged ACs 6
HiSen Packaged ACs 8
Scroll Compressor Technology 10
The ‘Tandem Scroll’ 10
Operating Instructions:
Floor-Mounted Packaged ACs ............................................. 12
Controller Specifications 12
Operating Instructions:
Ducted Split ACs.................................................................... 16
Controller Specifications 16
Inspection & Maintenance .................................................... 19
A ‘healthy’ supply 19
Regular inspection 19
Troubleshooting..................................................................... 22
Diagnosing faults 22
Quick-check Troubleshooting Chart 22
Condenser Water Piping
Schematic ............................................................................... 25
Troubleshooting the
Water Circuit........................................................................... 26
Technical Specifications ....................................................... 27
Schematics & Wiring Diagrams .......................................... 37
Warranty & Service ................................................................ 73
PACKAGED ACs & DUCTED SPLITS
2
Basics
What is airconditioning?
An airconditioning system consists of many pieces of mechanical and electrical
equipment assembled together to produce in an enclosed space acceptable
conditions of Temperature, Humidity, Air purity and Air motion.
The basic compression refrigeration cycle, the most important part of an
airconditioning system, is explained in the schematic diagram given below:
TECHNICAL MANUAL
3
What is a
Packaged Airconditioner?
When all the mechanical and electrical components of an airconditioning system
are assembled in a single package this is referred to as a Packaged Airconditioner.
They are generally floor-standing units.
Packaged ACs can be either air-cooled or water-cooled.
Air-cooled
Packaged Airconditioners
Air-cooled Packaged ACs use air to cool the refrigerant. The IDU contains all the
AC components except the condenser and its fan, which are separately housed
in the Outdoor Unit (ODU).
Electrical control of Aircooled Packaged AC models is at the bottom section of
the unit. The new facia controller is mounted on the upper panel section.
Water-cooled
Packaged Airconditioners
Water-cooled Packaged Airconditioners are compact floor standing units. All
components including the condenser are included in the unit. Water is pumped
into the unit to cool the refrigerant and the hot water is returned to external cooling
towers, cooled and recirculated. Only the piping connections for the water cycle
and the water cooling system are external. The electrical control panel is inbuilt
at the bottom of the unit. The new facia controller is mounted on the upper panel
section.
DPA, DPAN, DPAY 5.5, 8.75,
11, 16.5 TR Models
DPAP 5.5, 8.75, 11,
16.5 TR Models 22 TR Model
Outdoor Units
Indoor Unit
PACKAGED ACs & DUCTED SPLITS
4
Main Components
Air-cooled Packaged AC
A. Indoor Unit (IDU) B. Outdoor Unit (ODU)
COMPRESSOR CONDENSER COIL
COOLING COIL CONDENSER FAN WITH MOTOR
EXPANSION VALVE
BLOWER FAN
BLOWER FAN MOTOR
FILTER
CONTROL PANEL
Water-cooled Packaged AC
A. Indoor Unit (IDU)
B. Water cooled condenser (EXTRA)
General layout of components within the IDU
TECHNICAL MANUAL
5
3 TR Model
Indoor Unit
What is a Split Airconditioner?
A split airconditioner has two parts — the Indoor Unit (IDU) and the Outdoor Unit
(ODU). The IDU is a concealed box that houses the cooling coil, centrifugal
blower fan, electrical motor, expansion device, dryer etc. assembled in a single
box. The ODU, which is the condensing unit, comprises of the compressor, air-
cooled condenser and a cooling fan.
The ODU and IDU are interconnected by refrigerant piping and power cables.
This keeps the noise of the compressor out of the airconditioned space.
What is a
Ducted Split Airconditioner?
A ducted split airconditioner is a split airconditioner, in which the IDU is housed
in a concealed box, usually mounted above the false ceiling. The air-flow from
the IDU is directed into a ducted air distribution network. Ducting therefore is a
key design aspect of these ACs.
The ODU is conveniently located on the skirting, sunshade, roof-top or mounted
on a special platform to be grouted into the wall.
7.5 TR Model 5, 5.5, 8.75, 11 TR
Models
Outdoor Units
22 TR Model
PACKAGED ACs & DUCTED SPLITS
6
HiPer+ Packaged ACs
Blue Star's HiPer Plus Packaged Airconditioners offer high performance
machines even at high sensible loads and at 45o
C ambients!
The HiPer Plus is specially designed to aircondition IT/ITES/BPO premises
situated in cities with harsh summers.
Blue Star's HiPer Plus Packaged Airconditioners feature:
• Indoor units upsized to handle 90% sensible load delivering 550 CFM/ton,
and
• Outdoor condenser upsized and system balanced to deliver full capacity at
45o
C.
Hence, 100 tons of Hi Per Plus will suffice, where 125 tons of conventional
airconditioning was needed.
That makes 1 Ton load of Hi Per Plus equivalent to 1.25 nominal ton.
Features
Here are some of the features that make the Hi Per Plus Packaged Airconditioner
a high-end, superior quality product:
Efficient heat transfer:
The upsized evaporator offering enhanced surface area ensures removal of the
high sensible heat and handles a higher indoor air volume of 550 CFM per ton.
The inner grooved copper tubes with mechanically bonded slit aluminium fins
ensure efficient heat transfer.
Higher capacity evaporator fan:
Optimally selected DIDW forward curved centrifugal type fan exclusively designed
for delivering more air volume at 550 CFM/ton, with low noise levels.
Optimum expansion valve:
Optimally selected expansion valve with accurate preset super heat settings,
minimizes splash gas and eliminates the problem of improper cooling in the
evaporator.
Condenser with higher heat rejection capability:
The upsized condenser coil and twin fan condenser with higher heat rejection
capability, ensures lower condensing temperature, thereby delivering full capacity
even at temperatures as high as 45o
C with extraordinary energy efficiency and
substantially lower power consumption.
Corrosion resistant blue fin condenser:
The special precoated Blue Fin Condensers are resistant to both chemical and
saline corrosion. They are tested for 500 hours of salt spray as per international
standard JIS-Z-2371.
TECHNICAL MANUAL
7
Energy efficient scroll compressors:
Scroll type, hermetically sealed highly energy efficient Copeland compressors.
Acoustically treated and polyester powder painted panels:
High-density EPE Insulation dampens the unit noise in the plant room.The panels
are finished with glossy polyster powder paint, for longer life.
Safety alarms and controls:
Built-in safety features in the compressor and in the refrigeration circuits ensure
high level of protection to the unit.
Advanced Microcomputer Controller:
A feature-packed microcomputer controller with Run Time Equalization, Auto
Restart after power failure, Fuzzy Logic, Self-Fault Diagnostics and much more.
PACKAGED ACs & DUCTED SPLITS
8
HiSen Packaged ACs
The HiSen Packaged Airconditioner is designed optimally with an upsized cooling
coil for 90% sensible heat load removal, and higher capacity indoor fan for
delivering 550 CFM per ton. The upsized-cooling coil ensures a 10% improvement
in cooling capacity and hence leads to a 10% power saving as well.
Features
Here are some of the features that make the HiSen Packaged Airconditioner a
high-end, superior quality product.
Efficient heat transfer cooling coil, with enhanced surface area:
The inner grooved copper tubes with mechanically bonded slit aluminum fins
ensure efficient heat transfer. The upsized-cooling coil offering enhanced surface
area ensures removal of the high sensible heat and handles a higher indoor air
volume of 550 CFM per ton.
Higher capacity evaporator fan:
Optimally selected DIDW forward curved centrifugal type fan exclusively designed
for delivering more air volume at 550 CFM/ton with low noise levels.
Optimum expansion valve:
Optimally selected expansion valve with accurate preset super heat settings,
minimizes splash gas and eliminates the problem of improper cooling in the
evaporator.
Corrosion resistant blue fin condenser:
The special precoated Blue Fin Condensers can take on the harsh combination
of salty air, rain and other corrosive atmospheres. They are tested for 500 hours
of salt spray as per international standard JIS-Z-2371.
Energy efficient scroll compressors:
Scroll type, hermetically sealed highly energy efficient Copeland compressors.
Acoustically treated and polyester powder painted panels:
High density rigid acoustic board insulation, with over layer protection, dampens
the unit noise in the plant room. The panels are finished with glossy polyester
powder paint, for longer life.
Ready-made air outlet flange connections:
Units are provided with readymade flanged air outlets, to enable ease of
connection to the canvas or the duct flange.
Safety alarms and controls:
Built in safety features in the compressor and in the refrigeration circuits ensure
high level of protection to the unit.
TECHNICAL MANUAL
9
Advanced Microcomputer Controller
The advanced microcomputer controller offers the following user-friendly features:
• Run time equalization: Calculates and ensures equal run time for all
compressors.
• Auto restart after power failure: No inconvenience of manual restart.
• Memory back up: Keeps settings intact during power failures and
stoppages.
• Built-in-time delay: Protects compressor from instant stops and starts.
• Single phasing and reverse phase protection: Protects compressors from
damage.
• Fuzzy logic: Cools intelligently based on the heat load, and hence increases
efficiency.
• Self-fault diagnostics: Displays system trips, facilitating faster corrective
action.
• Easy hook-up with fire alarm system: Potential free contacts provided for
hooking on to the fire alarm system, for stopping the units in the event of a
fire.
PACKAGED ACs & DUCTED SPLITS
10
Scroll Compressor Technology
The scroll technology is the most advanced compression technology with only
three moving parts and with 100 % volumetric efficiency ideally suitable for most
rugged commercial and industrial applications.
Scroll compressors have much better liquid refrigerant handling capability than
the other types of compressors due to the nature of scroll design.
Scroll compressor durability and reliability as well as its quiet operation are
inherent with the design of the scroll compressor.
The ‘Tandem Scroll’
Scroll-compressor-driven Packaged Airconditioners a few years ago paved the
way for the migration of the AC industry to a more energy efficient cooling platform,
the Tandem Scroll airconditioning system.
A tandem scroll compressor consist of two individual compressors, mounted on
a common base, manifolded in to a single refrigerant circuit. A tandem compressor
(set) has the common suction, discharge, oil and also additional crank gas
equalizer lines between the two compressors.
For example, two scroll compressors are linked in tandem to form one tandem
scroll compressor.
Tandem Compressor
TECHNICAL MANUAL
11
In a conventional multi-circuit air conditioning system (as in a 11 ton Scroll
Packaged AC), two 5.5-ton compressors drive two independent circuits, each
with its own evaporator and condenser, each circuit rated to 5.5 tons.
In a tandem scroll air conditioner, the 11-ton tandem scroll drives just one circuit,
which therefore consists of just one condenser and evaporator, both of which
are however designed for the full capacity of 11 tons.
Full Load Operation
Under full load conditions, the tandem scroll machine and the conventional scroll
machine behave almost identically.
Part Load Operation
The entire picture changes dramatically under part-load conditions.
Part-load conditions are those that prevail when an air-conditioned space is not
fully occupied or used with less occupancy, as for example a half-full theatre or
an empty showroom. In such cases, the entire capacity of the installed air
conditioning system is not required to cool the premises.
In both conventional and tandem scroll machines, one of the two compressors
switches off under part-load conditions. However, in the tandem scroll system,
the compressor that remains on utilizes the entire fully rated condenser for cooling
purposes. This seemingly minor fact is a significant air conditioning innovation,
remarkably increasing operating efficiency to the extent of 23%!
The tandem scroll advantage
• Under favourable conditions, a compressor not only delivers higher tonnage,
but consumes less power thus giving a dramatic increase in EER
• Under part-load conditions, using the double-capacity rated condenser is
a ‘favourable operating condition’ for the compressor. Tandem Scroll
compressors should therefore deliver a higher EER under part-load conditions.
PACKAGED ACs & DUCTED SPLITS
12
Operating Instructions:
Floor-Mounted Packaged ACs
CONTROLLER SPECIFICATIONS
A) Salient Features
1. Digital control and setting of temperature values in 1o
C.
2. Automatic selection of compressors with run time Equalization.
3. Non Volatile Memory backup for all set value parameters.
4. Automatic starting of unit in case of power failure.
5. Built-in time delays for Compressor and fan.
6. Built-in Single phase/phase reversal protection.
B) Specifications
1. Power supply Single phase, Voltage: 175 to 260 V AC.
Frequency: 50 Hz + 3%
2. Operating temperature limit 0 - 65o
C
3. Display 2 Digit 7-Segment LED Display,
LED indicators and touch key pad
4. Temperature control accuracy + 1%
5. Set temperature range 19 - 32o
C
6. Temperature sensors NTC thermister bit sensor with 5 meter long cable
7. LED Display & Keypad HANDSET Pendant mounting
8. Micro Computer Base unit Base mounting (enclosed in fire-retardant box)
C) Description of LED Indicators & Keys on Handset
LED indicators & keys available on keypad of the PKG unit handset are as follows:
Reset LED : This LED indicator flashes green once if any key is pressed. In
case of any fault, green flashes continuously.
FAN (Ev) LED : If Blower Fan is ON, this LED indicator is Green and Red if it is OFF.
FAN MODE LED : If Fan Mode is Selected, then only this LED indicator glows blue.
COOL MODE LED : If Cool Mode is Selected, then only this LED indicator glows blue.
COMPR 1,2,3 LED : If Compr 1, 2, 3 are ON, this LED indicator is Green, and Red it it is OFF.
ON/OFFLED : This indicator is green if the unit is in ON mode and Red if it is in OFF.
UP/DN Key : These keys are used to increment values of the selected parameter.
TECHNICAL MANUAL
13
AC MODE Key : This key is used for selecting either Fan or Cool Mode.
ON/OFF Key : This key is used for switching ON or OFF the unit.
RESET Key : This key is used for resetting a Fault or for restarting the unit after
removing the existing fault.
D) Setting of Temperature
The 2-digit seven-segment display shows Actual Return Air Temperature. To
view Set Temp, press UP/DN key once. At any time of operation, if no key is
pressed for next successive 10 seconds, the display will show Actual Return Air
Temperature. Temperature can be set between 19 to 32o
C by pressing the UP/
DN keys. After you press UP or DN key Display will indicate the old setting.
Press desired key to set new values. As soon as you reach the desired
Temperature stop adjusting the keys. The digits will start blinking for 5 seconds.
When the blinking stops the LED will show the Actual Return Air Temperature.
Recommended Temperature for optimum comfort and power saving is
24 +/- 1o
C.
E) Fault & Alarms Display
LED indicators display various faults occurring in the unit as follows.
Nature of Fault Display on LED LED indication on Keypad &
correction of Fault.
SPPR Fault SP Pr (scrolling) RESET LED indicators will flash after
the fault is cleared, now press Reset
Key to restart the unit.
Cooling Tower Ct Co LED indicators will flash Red if the
Fault fault exists. After the fault is cleared,
unit restarts automatically.
Fan Overload BF Ev LED indicator will flash Red if the
Fault fault exists. After the fault is cleared,
unit restarts automatically.
Cond Fan1 MCB CF COMPR 1 LED indicator will flash Red
trip/off Fault if the fault exists. After the fault is
cleared, unit restarts automatically.
Cond Fan2 MCB CF COMPR 2 LED indicator will flash
trip/off Fault Red if the fault exists. After the fault
is cleared, unit restarts automatically.
Cond Fan3 MCB CF COMPR 3 LED indicator will flash
trip/off Fault Red if the fault exists. After the fault
is cleared, unit restarts automatically.
PACKAGED ACs & DUCTED SPLITS
14
Compr 1 Fault HP LP COMPR 1 LED indicator will flash
High/Lo Pressure (scrolling) Red if the fault exists. RESET LED
indicator will flash after the fault is
cleared, now press Reset Key to
restart the unit.
Compr 2 Fault HP LP COMPR 2 LED indicator will flash
High/Lo Pressure (scrolling) Red if the fault exists. RESET LED
indicator will flash after the fault is
cleared, now press Reset Key to
restart the unit.
Compr 3 Fault HP LP COMPR 3 LED indicator will flash
High/Lo Pressure (scrolling) Red if the fault exists. RESET LED
indicator will flash after the fault is
cleared, now press Reset Key to
restart the unit.
Temp sensor is tH IF Temp sensor is open or bad then
open or bad. only LED will display Fault. This fault
is Auto reset.
TECHNICAL MANUAL
15
F) Operating Instructions
Switch ON the unit by pressing ON/OFF key. ON LED will glow Green.
To Start Evaporator Blower (FAN Mode)
Press AC MODE Key to select the FAN Mode. FAN Mode LED will glow. The
Blower Fan will come on immediately (if fan overload relay is not tripped.)
To Start Compressor (COOL Mode)
Press AC MODE Key once again to select the COOL Mode. COOL Mode LED
will glow & Fan Mode LED will be Off. The compressor will come on with pre-set
delay of 2 minutes. In case of multi compressor system the 2nd
& 3rd
compr. will
come on after additional 15 sec. delay per compressor. Simultaneously the
compressor indication starts blinking Green & then glow continuously thereafter.
The Controller will select the number of compressors to be on based on Actual
Room Temp & Set Temp. as follows:
If actual Temp =/> Set Value + 3, all the Compressors will be ON.
If actual Temp =/< Set Value + 2, only two Compressors will be ON.
If actual Temp =/< Set Value + 1, only one Compressor will be ON.
If actual Temp =/< Set Value - 1, all the Compressors will be OFF.
Fan
Mode
LED
Cool
Mode
LED
ON/OFF
Key
PACKAGED ACs & DUCTED SPLITS
16
Operating Instructions:
Ducted Split ACs
CONTROLLER SPECIFICATIONS
A) Salient Features
1. Digital control and setting of Temperature values in 1 Deg. C.
2. Automatic selection of compressors with run time Equalization.
3. Non Volatile Memory backup for all set value parameter.
4. Automatic starting of unit in case of power failure.
5. Built-in time delays for Compressor and Fan.
B) Specifications
1. Powers supply Single Phase, Voltage: 185 to 260 V AC.
Frequency: 50 Hz ±3%
2. Operating temperature limit 0 - 65°C
3. Display 2 Digit 7-Segament LED Display,
LED indicators and touch key pad
4. Temperature control accuracy ± 1%
5. Set temperature range 19 - 32°C
6. Temperature sensors NTC thermister Bit sensor
with 5 meter long cable
7. LED Display & Keypad HANDSET Pendant mounting
8. Micro Computer Base Unit Base mounting (enclosed in fire-retardant box)
C) Description of LED Indicators & Keys on Handset
Reset LED : This LED indicator flashes once green if any key is pressed, or in
case of any fault, flashes green continuously.
FAN (Ev) LED : If Blower Fan is ON, this LED indicator is Green and Red if it is OFF.
FAN MODE LED : If Fan Mode is Selected then only this LED indicator will glow blue.
FAN SPEED LED : If Fan Speed is Selected LO then only this LED indicator will glow
( LO / HI ) Yellow and if selected HI then LED indicator will glow Blue.
COOL MODE LED : If Cool Mode is Selected then only this LED indicator will glow blue.
COMPR 1,2,3 LED : Compr 1,2,3 is ON, this LED indicator is Green and Red if it is OFF.
ON/OFF LED : This indicator is Green if the unit is in ON mode and Red if it is OFF.
UP/DN Key : These keys are used for increment / decrement value of the selected
parameter.
TECHNICAL MANUAL
17
AC MODE Key : This key is used for selecting either Fan or Cool Mode.
ON/OFF Key : This key is used for switching ON or OFF the unit.
FAN SPEED Key : This key is used for switching Fan speed High/Low.
RESET Key : This key is used for resetting the Fault or for restarting the unit after removing
the existing fault.
D) Setting of Temperature
The 2-digit seven-segment display will show the Actual Return Air Temperature. To view Set Temp.
press UP/DN key once. At any time of the operation, if no key is pressed for next successive 10
seconds, the display will show Actual Return Air Temperature.
Temperature can be set between 19 to 32 Degree Centigrade by pressing UP/DN keys.
After you press UP or DN key Display will indicate the old setting. Press desired key to set new
values. As soon as you reach the desired Temperature stop adjusting the keys.
The digits will start blinking for 5 seconds. When the blinking stops the LED will show the Actual
Return Air Temperature.
Recommended Temperature for optimum comfort and power saving is 24 +/- 1 Deg. Cen.
E) Fault & Alarms Display
LED indicators displays the various faults occurring in the unit are as following.
Nature of Fault Display on LED LED indication on Keypad & correction of
Fault.
SPPRFault SP Pr (scrolling) RESET LED indicator will flash after the fault
s cleared, now press Reset Key to restart the
unit.
Cond Fan MCB CF Co LED indicator will flash Red if the fault
trip/off Fault exists. This fault is Auto reset (Only for DSA
903 Model)
Compr 1 Fault HP LP COMPR 1 LED indicator will
High/Lo Pressure (scrolling) flash Red if the fault exists.RESET LED
indicator will flash after the fault is cleared,
now press Reset Key to restart the unit.
(Not for DSA903)
Compr 2 Fault HP LP COMPR 2 LED indicator will flash Red
High/Lo Pressure (scrolling) if the fault exists.RESET LED indicator will
flash after the fault is cleared, now press
Reset Key to restart the unit.
(Not for DSA903)
Temp sensor is tH IF Temp sensor is open or bad then only LED
open or bad. will display Fault. This fault is Auto reset.
PACKAGED ACs & DUCTED SPLITS
18
F) Operating Instructions
Switch ON the unit by pressing ON/OFF key. ON/OFF key LED will glow Green.
To Start Evaporator Blower (FAN Mode):
Press AC MODE Key to select the FAN Mode, then FAN Mode LED will glow.
The Blower Fan will come on immediately.
To Start Compressor (COOL Mode):
Press AC MODE Key once again to select the COOL Mode, then COOL Mode LED will glow
& Fan Mode LED will be Off. The compressor will come on with pre-set delay of 1 minutes. In case
of multi compressor system the 2nd
& 3rd
compr. will come on after additional 10 sec. delay per
compressor. Simultaneously the compressor indication will start blinking in Green for time period
stated & glow continuously thereafter. Controller will select number of compressors based on
Actual Room Temp & Set Temp. as following
If Actual Temp =/> Set Value + 3, all the Compressors will be ON. (Only for DSA 903)
If actual Temp =/< Set Value + 2, only two Compressors will be ON. (for DSA 903 / 1322)
If actual Temp =/< Set Value + 1, only one Compressor will be ON.
If actual Temp =/< Set Value - 1, all the Compressors will be OFF.
On/Off Key
Fan Mode
Cool
Mode
Speed HI
Speed LO
TECHNICAL MANUAL
19
Filter
Water hose
Inspection & Routine Maintenance
Regular inspection of the IDU and ODU reduces failures and assures continuous
operation.
A ‘healthy’ supply
CHECK IF INCOMING POWER IS AS PER THE RATED POWER SUPPLY:
VOLTS 380-420V
PHASE THREE PHASE
CYCLES 50 Hz
TYPE AC ONLY
Regular inspection
Regular inspection must be carried out as follows:
Item Period Inspection Procedure
Filter cleaning Once a week
Pull out from top ends and lift to remove the front
GRILLE from the UNIT. Then remove the
internal filter and wash it with water. Dry the filter
in the shade and re-install it.
Slide the filter from lifting upwards and wash it
with water. Dry the filter in the shade and re
install it.
For Packaged AC
For Ducted Split AC
PACKAGED ACs & DUCTED SPLITS
20
Item Period Inspection Procedure
For Packaged AC
For Ducted Split AC
Gas leak check Twice a year
Remove the grille and front bottom cover
and conduct test for gas leaks in all
refrigerant pipe joints.
For Packaged AC
Gas leak check Four times
a year
For Ducted Split AC
Remove the cover from the bottom and
conduct test for gas leaks inside portion of
the coil and remove filter for outer portion.
Indoor Unit
Outdoor Unit
Test for leaks in condenser coil tubes and
also compressor joints.
General compressor Twice a year Oil leaks...
checks Verify that there are no oil leaks.
Crank case heater...Touch the heater body to
verify that it is warm.
Vibration isolation rubber ... Inspect the
vibration isolation rubber for wear.
Oil leaks...
Verify that there are no oil leaks.
Vibration isolation rubber ... Inspect the
vibration isolation rubber for wear.
Check for bolts tight at the mounting legs.
TECHNICAL MANUAL
21
Condenser Coil Four times
and outdoor unit a year
Thorough cleaning of coil and the overall
unit can reduce atmospheric dust pollution
and improves performance.
Item Period Inspection Procedure
For Packaged AC
Electrical circuits Four times Check all wires/cables and connector
& terminals a year terminals are tight with screwed ends.
If not, tighten and pull the wire for proper grip/
holding.
Condenser Once in a Clean the condenser coils with portable
coils month blower to blow out dust. This improves the
performance.
For Ducted Split AC
PACKAGED ACs & DUCTED SPLITS
22
Troubleshooting
Faults and complaints in Packaged AC systems can be broadly classified under
three areas. The first step in troubleshooting is to identify the area and diagnose
the fault.
Diagnosing faults
Malfunctions can be classified under any of the following:
A. The Electrical Circuit
The malfuntioning of electrical circuit is due to LOW or HIGH voltage variations,
frequent power failures, loose electrical contacts, defective electrical components,
etc. Proper periodical maintenance of the unit will reduce such malfunctioning.
Problems due to power supply quality must be sorted out with the concerned
electricity board.
B. The Refrigeration Circuit
Improper cooling usually indicates poor performance of the refrigeration circuit.
Reasons may be poor servicing, low/high gas in the system, noncondensible
gases, and lower efficiency of the compressor. Periodical service helps avoid
such problems. The troubleshooting chart that follows will help isolate the exact
fault and suggest remedies.
C. The Conditioned Air Circuit
Less air flow, poor cooling, uneven temperature, excessive airleaks are complaints
that come under this classification. Most of them can be eliminated by periodical
servicing. The troubleshooting chart that follows will help isolate the exact fault
and suggest remedies.
Quick-check Troubleshooting Chart
SYMPTOMS CAUSE REMEDY
1. COMPRESSOR
HIGH DISCHARGE PRESSURE Non condensible gases Purge the system
Over charged refrigerant Remove excess
Choked condenser fins Clean the ODU coil
Less ODU airflow Correct fan direction
LOW DISCHARGE PRESSURE Low refrigerant charge Check for leaks, repair and
recharge
Low compression efficiency Replace compressor.
HIGH SUCTION PRESSURE Excessive load Reduce fresh air & load
Defective suction valves Replace compressor
(continued)
TECHNICAL MANUAL
23
SYMPTOMS CAUSE REMEDY
(continued)
LOW SUCTION PRESSURE Clogged suction strainer Clean/replace strainer
No cooling load Check thermostat
Choked air filter Clean air filter
COMPRESSOR SHORT
CYCLES ON LOW PRESSURE Thermostat erratic Check thermostat
COMPRESSOR TRIPS ON
HIGH PRESSURE Air in the system Purge the system
Overcharged gas Remove excess charge
Condenser fan not working Check ODU performance
COMPRESSOR NOISY Liquid knock Check return air filter/
Check for coil chokeup
Defective valve reeds Replace compressor
SCROLL COMPRESSOR
COMPRESSOR PRESSURE Compressor motor working Interchange any two
DOES NOT BUILD UP TO in reverse rotation phases of polarity for
HIGH PRESSURE changing direction
COMPRESSOR PRESSURE — Do— —Do—
DOES NOT GO DOWN ON
LOW PRESSURE
COMPRESSOR NOISY — Do— —Do—
2. BLOWER
FAN MOTOR
NOT STARTING Check power supply/fuses Restore power supply
TRIPPING ON OVER LOAD Check over load relay Reset relay
Fuse blown Check electrical circuit
and replace
3. OVERALL UNIT
NOISY OPERATION Blower touching scroll Realign blower
Bearing noise Lubricate bearings
Belt loose Tighten the belt
PACKAGED ACs & DUCTED SPLITS
24
SYMPTOMS CAUSE REMEDY
Loose panels Check & tighten screws
UNIT OPERATES
CONTINOUSLY Shortage of refrigerant Charge gas
Defective thermostat Replace thermostat
Unit undersized Recheck heatload
4. CONDITIONED AREA
DISCOMFORT IN THE
CONDITIONED AREA Less air flow Check air filter / belt
High humidity Regulate fresh air
Poor cooling Check refrigeration circuit
TOO WARM IN
CONDITIONED SPACE Excess heat load Check & regulate heat load
Inadequate cooling Check compressor ‘ON’/
Check filter choke up
Less airflow Check reversal of blower fan
Compressor trips soon Change incoming supply
after start phase polarity on any two
phases (for scroll compressor)
TOO COLD IN
CONDITIONED SPACE Defective thermostat Replace thermostat
Contactor stuck up Replace contactor
TECHNICAL MANUAL
25
Condenser Water Piping Schematic
PACKAGED ACs & DUCTED SPLITS
26
Troubleshooting the Water Circuit
SYMPTOMS CAUSE REMEDY
EXCESSIVE WATER DRIFT
UNUSUAL FAN DRIVE
VIBRATION
FAN NOISE
SCALE OR FOREIGN
SUBSTANCE IN WATER
SYSTEM
Faulty drift elimination
Over-pumping
Loose bolts & cap screws
Fan
Motor
Loose fan hub cover
Insufficient blow down
Poor water quality
Check to be sure all Louvres,
Eliminator Sections or slats and
splash retainers are in place.
Top deck assemblies and wood fill
splash bars must be intact and
level. There must be no tendency
to channel water. Fill packs must
be intact and in place with no
sagging or gaps between packs.
Reduce water flow to tower to
design conditions or use larger
metering orifices.
Tighten all bolts and cap screws on
all mechanical equipment and
supports.
Be sure blades are properly
positioned in correct sockets.
Check match numbers. Make
certain all blades are as far from
centre of fan as safety devices
permit. All blades must be pitched
the same. Clean-off deposit build
up on blades.
Disconnect load and operate
motor. If motor still vibrates, check
for bent shaft or unbalanced rotor.
Replace shaft or rebalance rotor.
Tighten fan hub cover fasteners.
Check water quality
Install Water Treatment System
TECHNICAL MANUAL
27
Technical Specifications
MODELS
Floor-Mounted Packaged ACs
HiPer Plus + Packaged Airconditioner DPAP 661S, 1052S, 1322S, 1983S
HiSen Packaged Airconditioner DPAN 661S, 1052S, 1322S, 1983S
Tandem Packaged Airconditioner DPAY 1321S, 1982S
Air Cooled Packaged Airconditioner DPA 661BS, 1052BS, 1322BS,
1983BS, 2642S
Water Cooled Packaged Aircondionter DPW 661AS, 1322AS, 1983AS
Aircooled Ductable Splits with DSA 361D, 601D, 903B
Recip. Compressor
Air Cooled Ductable Splits with 661DS, 1001BS, 1052BS, 1322DS
Scroll Compressor 2642S
Water Cooled Ductable Splits with DSW361, 661S, 1052S, 1322S
Scroll Compressor and Recip
Ducted Splits
PACKAGED ACs & DUCTED SPLITS
28
HiPer Plus
(Hi Sensible Air-cooled Packaged Airconditioners with
Scroll Compressors & High EER Condensers)
Model Units DPAP-661S DPAP-1052S DPAP-1322S DPAP-1983S
Nominal Cooling Capacity KCAL/HR 16500 26250 33000 49500
TR 5.5 8.75 11 16.5
4 Wire System-415V -3PH-50Hz
Indoor Unit
Dimensions W x D x H (mm) 900 x 660 x 1700 1160 x 660 x 1700 1500 x 750 x 1800 1500 x 930 x 2000
Cooling Coil Internally Grooved Copper Tubing with Slit Fins
Blower Fan Centrifugal
Nominal Airflow CMH 4675 7450 9350 14025
Fan Motor Watts 560 1500 2250 3000
Compressor Type Scroll
Quality 1 2 2
Conrol Panel Inbuilt
External Static 6 7.5 8 10
Outdoor Unit
(high ambient)
Dimensions W x D x H (mm) 1020 x 406 x 1270 1020 x 406 x 1270 1020 x 406 x 1270 1020 x 406 x 1270
Condenser Coil Inner Grooved with Slit Fins-Anti Corrosion Coating
Quantity 1 2 2 3
Condenser Fan Type Propeller
Nominal Airflow CMH 7500 7500 7500 7500
Fan Motor Watts 188 188 188 188
Quantity 2 2 2 2
Indoor Unit Weight Kg 195 295 470 600
Outdoor Unit Weight Kg 75 75 75 75
Safety Devices for Inbuilt Internal Thermal Protector
Compressor Protection Internal Pressure Relief Valve
High Pressure Cutout
Low Pressure Cutout
Refrigerant Piping/Elecrical Hard Drawn Grade - ‘L’ Copper Tubes Only
Hot Gas Line Od Inches X Gauge 7/8 “ X 16G 7/8 “ X 16G 7/8 “ X 16G 7/8 “ X 16G
Liquid Line 5/8 “ X 19G 5/8 “ X 19G 5/8 “ X 19G 5/8 “ X 19G
Condensate Drain GI / PVC 32mm 32mm 32mm 32mm
MCB Rating 32A 40A 40A 63A80A
Power Cable Incoming Copper 4Cx6mm Sq Cu 4Cx10mm Sq Cu 4Cx10mm Sq Cu 4Cx16mm SQ CU
Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
TECHNICAL MANUAL
29
HiSen
(Hi Sensible Air-cooled Packaged Airconditioners with
Scroll Compressors & Standard Condensers)
Model Units DPAN-661S DPAN-1052S DPAN-1322S DPAN-1983S
Nominal Cooling Capacity KCAL/HR 16500 26250 33000 49500
TR 5.5 8.75 11 16.5
4 Wire System-415V -3PH-50Hz
Indoor Unit
Dimensions W x D x H (mm) 900 x 660 x 1700 1160 x 660 x 1700 1500 x 750 x 1800 1500 x 930 x 2000
Cooling Coil Internally Grooved Copper Tubing with Slit Fins
Blower Fan Centrifugal
Nominal Airflow CMH 4675 7450 9350 14025
Fan Motor Power Watts 560 1500 2250 3000
Compressor Type Scroll
Quality 1 2 2 3
Conrol Panel Digital-Micro Controller Type Inbuilt
External Static MM 6 7.5 8 10
Outdoor Unit
(Normal ambient)
Dimensions W x D x H (mm) 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954
Condenser Coil Inner Grooved with Slit Fins-Anti Corrosion Coating
Quantity 1 2 2 3
Condenser Fan Type Propeller
Nominal Airflow CMH 7500 7500 7500 7500
Fan Motor Power Watts 240 240 240 240
Quantity 1 1 1 1
Indoor Unit Weight Kg 195 295 470 600
Outdoor Unit Weight Kg 86 86 86 86
Safety Devices for Inbuilt Internal Thermal Protector
Compressor Protection Internal Pressure Relief Valve
High Pressure Cutout
Low Pressure Cutout
Refrigerant Piping/Electrical Hard Drawn Grade - ‘L’ Copper Tubes Only
Hot Gas Line Od Inches X Gauge 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g
Liquid Line 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g
Condensate Drain GI/PVC 32mm 32mm 32mm 32mm
MCB Rating 32A 40A 63A 63A
Power Cable Incoming Copper 4Cx6mm Sq Cu 4Cx10mm Sq Cu 4Cx10mm Sq Cu 4Cx16mm Sq Cu
Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
PACKAGED ACs & DUCTED SPLITS
30
Air-cooled Packaged Airconditioners
(With Scroll Tandem Compressors)
Model Units DPAY-1321S DPAY-1982S
Nominal Cooling Capacity Kcal /Hr 33000 49500
TR 11 16.5
Indoor Unit
Dimensions W X D X H (mm) 1160 X 660 X 1700 1500 X 750 X 1800
Cooling Coil
Blower Fan Centrifugal
Nominal Airflow CMH 7480 11220
Fan Motor Watts 1500 2250
External Static mm 8 9
Compressor Type Scroll Scroll
Quantity 1tandem 1 Tandem + 1 Single
Safety Devices For Inbuilt Internal Thermal Protector
Compressor Protection Internal Pressure Relief Valve
High Pressure Cutout
Low Pressure Cutout
Control Panel Digital -micro Cotroller Type
Outdoor Unit
Dimensions W X D X H (mm) 1020 X 406 X 954 1020 X 406 X 954
Quantity 2 3
Condenser Fan Type Propeller Propeller
Nominal Airflow CMH 7500 7500
Fan Motor Watts 240 240
Quanity 1 1
Indoor Unit Weight Kg 305 503
Outdoor Unit Weight Kg 86 86
Refrigerant Piping/Elecrical
Hot Gas Line Od Inches X Gauge 1 1/8 “ X 16g 1 1/8 “ Tandem & 7/8” Solo 16 g
Liquid Line 5/8 “ X 19g 5/8 “ X 19g Both
Condensate Drain GI / Pvc 32mm 32mm
MCB Rating 40A 63A
Power Cable Incoming Copper 4cx10mm Sq Cu 4cx16mm Sq Cu
Earthing Double Loop 2 X 8 G Gi Wires 2 X 8 G Gi Wires
TECHNICAL MANUAL
31
Air-cooled Packaged Airconditioners
(With Scroll Compressors)
New
Model Units DPA-661BS DPA-1052BS DPA-1322BS DPA-1983BS DPA2642S
Nominal Cooling KCAL/HR 16500 26250 33000 49500 66000
Capacity
TR 5.5 8.75 11 16.5 22
4 Wire System-415V -3PH-50Hz
Indoor Unit
Dimensions WxDxH (mm) 900 x 660 x 1700 1160 x 660 x 1700 1160 x 660 x 1700 1500 x 750 x 1800 1500 x 930 x 2000
Cooling Coil Internally Grooved Copper Tubing with Slit Fins
Blower Fan Centrifugal
Nominal Airflow CMH 3740 5900 7480 11220 14960
Fan Motor Power Watts 560 1100 1500 2250 3000
Compressor Type Hermetically Sealed Scroll
Quality 1 2 2 3 2
Conrol Panel Digital-Micro Controller Type (Inbuilt)
External Static MM 6 7.5 8 9 10
Outdoor Unit
(Normal ambient)
Dimensions W x D x H (mm) 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 1435 x 620 x 947
Condenser Coil Inner Grooved with Slit Fins-Anti Corrosion Blue fin coated
Quantity 1 2 2 3 2
Condenser
Fan Type Propeller
Nominal Airflow CMH 7500 7500 7500 7500 17000
Fan Motor Power Watts 240 240 240 240 260
Quantity 1 1 1 1 2
Indoor Unit Weight Kg 195 295 302 438 580
Outdoor Unit Weight Kg 86 86 86 86 120
Safety Devices for Inbuilt Internal Thermal Protector
Compressor Internal Pressure Relief Valve
Protection High Pressure Cutout
Low Pressure Cutout
Refrigerant Piping/Elecrical Hard Drawn Grade - ‘L’ Copper Tubes Only
Hot Gas Line Od Inches X 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g 1 1 / 8 “X 16g
Gauge
Liquid Line 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g 7 / 8 “ X 19g
Condensate 32mm 32mm 32mm 32mm 32mm
Drain Gi / PVC
Mcb Rating 32A 40A 40A 63A 80A
Power Cable Copper 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu 4cx16mm Sq Cu 4cx25mm Sq Cu
Incoming
Earthing Double 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
Loop
PACKAGED ACs & DUCTED SPLITS
32
Water-cooled Packaged Airconditioners
(With Scroll Compressors)
Model Units DPW-661AS DPW-1322AS DPW1983AS
Nominal Cooling Capacity KCAL /HR 16500 33000 49500
TR 5.5 11 16.5
Dimensions WxDxH (mm) 900x660x1700 1160x660x1700 1500x750x1800
Weight Kg 253 390 556
Compressor Type Scroll Scroll Scroll
Type Quantity 1 2 3
External Static mm 6 8 9
Compressor Protection Inbuilt Internal Thermal Protector
Internal Pressure Relief Valve
High Pressure Cutout
Low Pressure Cutout
Oil Charge (Ltrs) Ltrs 1.77 1.77 1.77
Power Supply 380 / 420 V, 3 Phase, 50 Hz AC
Operating Voltage 342 / 462
Mounting Arrangement 4 Nos Rubber Mounts With Sleeves
Compressor Wt. Kgs 38.1 38.1 38.1
Evaporator Coil
Fin Material Aluminium 0.16mm Thick
Tube Material Copper
Tube Dia Mm / Inches 9.5 / 3/8"
Evaporator Blower
Blower Fan Centrifugal Forward
Curved Double Inlet
Nominal Airflow CMH 3740 7480 11220
Fan Motor Watts 560 1500 2250
Blower Size (Od Xlg) mm 305 X 229 305 X 305 381x 381
No Of Blowers Qtty 1 1 1
Motor Rpm 1440
Expansion Device Thermostatic Expansion Valve With External Eqaliser
Air Filter Size mm 517x828x10 517x828x10 457x933x10
No Of Filters Nos 1 2 3
Condenser Water Cooled
Type
Tube Material/ Od Cu / 3/4"Od Cu / 3/4"Od Cu / 3/4"Od
Quantity 1 1 1
Water Connections In & Out Bsp Mm 32 Mm
Refrigerant Conn. -Hs Od Cu Inches 1/2" / 3/8" 1/2" / 3/8" 1/2" / 3/8"
Inlet/ Liquid
Fusible Plug Size / mm / Deg C 9.5mm/91 ºC
Melting Temp.
Drain Plug And Vent mm Fpt 6.3 Mm / 1/4"
Water Quantity Usgpm 20 40 60
Pressure Drop Psig 3.5 9 10
Fouling Factor Sq. Ft. Hr. 0.0005
Deg. F/Btu
Drain Piping/Elecrical GI/ Class B Pipes
Condensate Drain 32mm 32mm 32mm
GI / PVC
MCB Rating 32A 40A 63A
Power Cable Incoming Copper 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx16mm Sq Cu
Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
TECHNICAL MANUAL
33
Air-cooled Ductable Split Airconditioners
(With Scroll Compressors)
Model Units DSA-661DS DSA-1001BS DSA-1052BS DSA-1322DS DSA-2642S
Indoor Unit
Nominal Cooling Capacity Kcal /Hr 16500 24900 26250 33000 66000
Tr 5.5 8.3 8.75 11 22
Dimensions WxDx H (Mm) 1220x675x450 1525x675x450 1525x675x450 1850x675x450 2160x1225x690
Indoor Unit Weight Kg 68 96 96 127 230
Evaporator Coil
Fin Material Aluminium 0.16mm Thick
Tube Material Copper
Tube Dia Mm / Inches 9.5 / 3/8"
Evaporator Blower
Blower Fan Centrifugal Forward Curved Double InletCentrifugal Forward Curved Double Inlet
Nominal Airflow Cmh 3740 5650 5900 7480 14960
Fan Motor Watts 375 375 Each 375 Each 375 Each 375 Each
Blower Size (Od Xlg) Mm 270x270 270x270 270x270 270x270 305x229
No Of Blowers Qtty 1 2 2 2 3
Air Outlet Size Mm 280x345 280x920 280x920 280x1095 342x1650
Expansion Device Thermostatic Expansion Valve With External Eqaliser
Air Filter Size Mm 563 X 403 468x403 468x403 593x403 645x595
No Of Filters Nos 2 3 3 3 3
Speed Rpm Rpm 920/870 920/870 920/870 920/870 920/870
Outdoor Unit
Dimensions WxDx H (mm) 1020x406x954 1380x856x557 1020x406x954 1020x406x954 1435x620x947
Compressor Type Scroll Scroll Scroll Scroll Scroll
Type Quantity 1 1 2 2 2
Power Input Each Kw 5.25 7.86 4.14 5.25 10.5
Compressor
Compressor Protection Inbuilt Internal Thermal Protector
Internal Pressure Relief Valve
High Pressure Cutout
Low Pressure Cutout
Oil Charge (Ltrs) Ltrs 1.77 3.25 1.77 1.77 3.25
Power Supply 380 / 420 V , 3 Phase, 50 Hz Ac
Operating Voltage 342 / 462
Mounting Arrangement 4 Nos Rubber Mounts With Sleeves
Compressor Wt. Kgs 38.1 69.4 35.4 38.1 62.6
Condenser Coil 3/8" (9.5mm) Cu Tubes And 0.16 Mm Thick Al Fins
Quantity 1 2 2 2 2
Condenser Fan Type Four Blade Propeller Fan
Nominal Airflow Cmh 7500 10200 7500 7500 17000
Fan Motor Watts 240 586 240 240 260
Quanity 1 1 1 1 2
Weight Kg 107 188 107 107 220
Refrigerant Piping/ Hard Drawn Grade - ‘L’ Copper Tubes Only
Elecrical
Suction Line Od InchesxGauge 7/8 “ X 19g 1 1/8 “ X 19g 3/4 “ X 19g 7/8 “ X 19g 1 3/8 “X 19g
Liquid Line 5/8 “ X 19g 5/8 “ X 19g 1/2 “ X 19g 5/8 “ X 19g 7/8 “ X 19g
Condensate Drain 25mm 25mm 25mm 25mm 25mm
GI / PVC
Mcb Rating 32A 40A 40A 40A 80A
Power Cable Incoming Copper 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu 4cx25mm Sq Cu
Earthing Double Loop 2 X 8 G Gi Wires 2 X 8 G Gi Wires 2 X 8 G Gi Wires 2 X 8 G Gi Wires 2 X 8 G Gi Wires
PACKAGED ACs & DUCTED SPLITS
34
Model Units DSA -361D DSA-601D DSA -903B
Nominal Cooling Capacity KCAL /HR 9000 15000
Tr 3 5 7.5
Indoor Unit
Dimensions WxDxH (mm) 915x660x375 1219x660x457 1525x660x457
Cooling Coil Inner Grooved Copper Tubing With Slit Fins
Blower Fan Centrifugal
Nominal Airflow CMH 2040 3400 5100
Fan Motor Watts 188 375 750
Quantity 1 1 1
Speed - Rpm 2-1200/1150 2-920/870 2 - 1200 /1150
Power To Fan Motor 230 V - 1 Ph - 50 Hz
External Static mm 4 5 7.5
Outdoor Unit
Dimensions WxDxH (Mm) 1020x406x686 1020x406x954 1360x550x856
Quantity 1 1
Power Supply Source 415 V -3 Ph - 50HZ
Compressor Hermetically Sealed Recip Compressor
Quantity 1 1 3
Condenser Fan Type Propeller
Nominal Airflow CMH 4000 6800 --
Fan Motor Watts 105 188 188
Quanity 1 1 2
Controller Elec. Micro Processor Pendant Controller Di. Pendant
Controller
Indoor Unit Weight Kg 60 86 96 kg
Outdoor Unit Weight Kg 80 112 220
Refrigerant Piping/ Hard Drawn Grade - ‘L’ Copper Tubes Only
Elecrical
Suction Line Od Inches X Gauge 3/4 “ X 19g 7/8 “ X 19g 5/8 “ X 19g
Liquid Line 3/8 “ X 19g 5/8 “ X 19g 3/8 “ X 19g
Condensate Drain 25mm 25mm 25mm
GI / PVC
MCB Rating 32A 32A 40A
Power Cable Incoming Copper 4cx6mm Sq Cu 4cx6mm Sq Cu 4cx6mm Sq Cu
Earthing Double Loop 2X8 G GI Wires 2X8 G GI Wires 2x8 G GI Wires
Air-cooled Ductable Split Airconditioners
(With Recip Compressors)
TECHNICAL MANUAL
35
Model Units DSW 361 DSW 661S DSW 1052S DSW 1322S
Nominal Cooling Kcal /Hr 9000 16500 26250 33000
Capacity
Tr 3 5.5 8.75 11
Indoor Unit
Dimensions W X D X H (mm) 953 X 585 X 381 1220 X 675 X 457 1525 X 675 X 457 1830 X 675 X 457
Blower Fan Centrifugal
Nominal Airflow CMH /CFM 2050/1200 3740/2200 5900/3440 7480/4400
Fan Motor Watts 180 375 375 375
Quantity 1 1 2 2
Speed - Rpm 1200/1100 2 - 920/870 2 - 920/870 2 - 920/870
Power To Fan 230 V - 1 Ph - 50 Hz
Motor
External Static mm 4 5 6 7
Outdoor Unit
Dimensions W X D X H (mm) 983x713x546
Quantity 1 1 2 2
Power Supply 415 V -3 Ph - 50Hz
Source
Compressor Recip Scroll
Quantity 1 1 1 1
Condenser Shell And Tube
Water Inlet/Out mm 31.7BSP
Let Size
Cooling Water Usgpm 11 20 15.5 20
Quantity
Controller Electronic Micro Processor Pendant Controller
Indoor Unit Weight Kg 60 68 96 127
Outdoor Unit Weight Kg 130 149 144 149
Cds Water Piping/ GI/ Ms Class B Pipes
Electrical
Condenser Water In 32mm 40mm 32mm 40mm
Condenser Water Out 32mm 40mm 32mm 40mm
Condensate Drain 25mm 25mm 25mm 25mm
GI / PVC
Mcb Rating 32A 32A 40A 63A
Power Cable Copper 4cx4mm Sq Cu 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu
Incoming
Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
Water-cooled Ductable Split Airconditioners
(With Recip & Scroll Compressors)
PACKAGED ACs & DUCTED SPLITS
36

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Blue star package units

  • 1. TECHNICAL MANUAL Floor Mounted Models : DPA 661BS, 1052BS, 1322BS, 1983BS, 2642S DPW 661AS, 1322AS, 1983AS DPAY 1321S, 1982S DPAP 661S, 1052S, 1322S, 1983S DPAN 661S, 1052S, 1322S, 1983S Floor Mounted Packaged Airconditioners & Ducted Split Airconditioners Ducted Split Models : DSA 361D, 601D, 903B, 661DS, 1001BS, 1052BS, 1322DS, 2642S DSW 361, 661S, 1052S, 1322S High Efficiency High Performance
  • 2. First published June 2006 No part of this publication may be reproduced in any manner whatsoever without permission in writing from the Sr. General Manager, Packaged Airconditioning Division, Blue Star Limited. While due care has been taken to avoid errors or misinterpretation, Blue Star Limited is neither liable nor responsible for consequence of any action taken, on the basis of this publication. Since ASHRAE standards use the FPS system, FPS nomenclature is used in some places in this publication for convenient reference. Published by Blue Star Limited, 9, Bazullah Road, T’Nagar, Chennai 600 017, India. For restricted circulation only. Not for sale.
  • 3. TECHNICAL MANUAL 1 Contents Basics ....................................................................................... 2 What is airconditioning? 2 What is a Packaged Airconditioner? 3 Main Components 4 General layout of components within the IDU 4 What is a Split Airconditioner? 5 What is a Ducted Split Airconditioner? 5 HiPer+ Packaged ACs 6 HiSen Packaged ACs 8 Scroll Compressor Technology 10 The ‘Tandem Scroll’ 10 Operating Instructions: Floor-Mounted Packaged ACs ............................................. 12 Controller Specifications 12 Operating Instructions: Ducted Split ACs.................................................................... 16 Controller Specifications 16 Inspection & Maintenance .................................................... 19 A ‘healthy’ supply 19 Regular inspection 19 Troubleshooting..................................................................... 22 Diagnosing faults 22 Quick-check Troubleshooting Chart 22 Condenser Water Piping Schematic ............................................................................... 25 Troubleshooting the Water Circuit........................................................................... 26 Technical Specifications ....................................................... 27 Schematics & Wiring Diagrams .......................................... 37 Warranty & Service ................................................................ 73
  • 4. PACKAGED ACs & DUCTED SPLITS 2 Basics What is airconditioning? An airconditioning system consists of many pieces of mechanical and electrical equipment assembled together to produce in an enclosed space acceptable conditions of Temperature, Humidity, Air purity and Air motion. The basic compression refrigeration cycle, the most important part of an airconditioning system, is explained in the schematic diagram given below:
  • 5. TECHNICAL MANUAL 3 What is a Packaged Airconditioner? When all the mechanical and electrical components of an airconditioning system are assembled in a single package this is referred to as a Packaged Airconditioner. They are generally floor-standing units. Packaged ACs can be either air-cooled or water-cooled. Air-cooled Packaged Airconditioners Air-cooled Packaged ACs use air to cool the refrigerant. The IDU contains all the AC components except the condenser and its fan, which are separately housed in the Outdoor Unit (ODU). Electrical control of Aircooled Packaged AC models is at the bottom section of the unit. The new facia controller is mounted on the upper panel section. Water-cooled Packaged Airconditioners Water-cooled Packaged Airconditioners are compact floor standing units. All components including the condenser are included in the unit. Water is pumped into the unit to cool the refrigerant and the hot water is returned to external cooling towers, cooled and recirculated. Only the piping connections for the water cycle and the water cooling system are external. The electrical control panel is inbuilt at the bottom of the unit. The new facia controller is mounted on the upper panel section. DPA, DPAN, DPAY 5.5, 8.75, 11, 16.5 TR Models DPAP 5.5, 8.75, 11, 16.5 TR Models 22 TR Model Outdoor Units Indoor Unit
  • 6. PACKAGED ACs & DUCTED SPLITS 4 Main Components Air-cooled Packaged AC A. Indoor Unit (IDU) B. Outdoor Unit (ODU) COMPRESSOR CONDENSER COIL COOLING COIL CONDENSER FAN WITH MOTOR EXPANSION VALVE BLOWER FAN BLOWER FAN MOTOR FILTER CONTROL PANEL Water-cooled Packaged AC A. Indoor Unit (IDU) B. Water cooled condenser (EXTRA) General layout of components within the IDU
  • 7. TECHNICAL MANUAL 5 3 TR Model Indoor Unit What is a Split Airconditioner? A split airconditioner has two parts — the Indoor Unit (IDU) and the Outdoor Unit (ODU). The IDU is a concealed box that houses the cooling coil, centrifugal blower fan, electrical motor, expansion device, dryer etc. assembled in a single box. The ODU, which is the condensing unit, comprises of the compressor, air- cooled condenser and a cooling fan. The ODU and IDU are interconnected by refrigerant piping and power cables. This keeps the noise of the compressor out of the airconditioned space. What is a Ducted Split Airconditioner? A ducted split airconditioner is a split airconditioner, in which the IDU is housed in a concealed box, usually mounted above the false ceiling. The air-flow from the IDU is directed into a ducted air distribution network. Ducting therefore is a key design aspect of these ACs. The ODU is conveniently located on the skirting, sunshade, roof-top or mounted on a special platform to be grouted into the wall. 7.5 TR Model 5, 5.5, 8.75, 11 TR Models Outdoor Units 22 TR Model
  • 8. PACKAGED ACs & DUCTED SPLITS 6 HiPer+ Packaged ACs Blue Star's HiPer Plus Packaged Airconditioners offer high performance machines even at high sensible loads and at 45o C ambients! The HiPer Plus is specially designed to aircondition IT/ITES/BPO premises situated in cities with harsh summers. Blue Star's HiPer Plus Packaged Airconditioners feature: • Indoor units upsized to handle 90% sensible load delivering 550 CFM/ton, and • Outdoor condenser upsized and system balanced to deliver full capacity at 45o C. Hence, 100 tons of Hi Per Plus will suffice, where 125 tons of conventional airconditioning was needed. That makes 1 Ton load of Hi Per Plus equivalent to 1.25 nominal ton. Features Here are some of the features that make the Hi Per Plus Packaged Airconditioner a high-end, superior quality product: Efficient heat transfer: The upsized evaporator offering enhanced surface area ensures removal of the high sensible heat and handles a higher indoor air volume of 550 CFM per ton. The inner grooved copper tubes with mechanically bonded slit aluminium fins ensure efficient heat transfer. Higher capacity evaporator fan: Optimally selected DIDW forward curved centrifugal type fan exclusively designed for delivering more air volume at 550 CFM/ton, with low noise levels. Optimum expansion valve: Optimally selected expansion valve with accurate preset super heat settings, minimizes splash gas and eliminates the problem of improper cooling in the evaporator. Condenser with higher heat rejection capability: The upsized condenser coil and twin fan condenser with higher heat rejection capability, ensures lower condensing temperature, thereby delivering full capacity even at temperatures as high as 45o C with extraordinary energy efficiency and substantially lower power consumption. Corrosion resistant blue fin condenser: The special precoated Blue Fin Condensers are resistant to both chemical and saline corrosion. They are tested for 500 hours of salt spray as per international standard JIS-Z-2371.
  • 9. TECHNICAL MANUAL 7 Energy efficient scroll compressors: Scroll type, hermetically sealed highly energy efficient Copeland compressors. Acoustically treated and polyester powder painted panels: High-density EPE Insulation dampens the unit noise in the plant room.The panels are finished with glossy polyster powder paint, for longer life. Safety alarms and controls: Built-in safety features in the compressor and in the refrigeration circuits ensure high level of protection to the unit. Advanced Microcomputer Controller: A feature-packed microcomputer controller with Run Time Equalization, Auto Restart after power failure, Fuzzy Logic, Self-Fault Diagnostics and much more.
  • 10. PACKAGED ACs & DUCTED SPLITS 8 HiSen Packaged ACs The HiSen Packaged Airconditioner is designed optimally with an upsized cooling coil for 90% sensible heat load removal, and higher capacity indoor fan for delivering 550 CFM per ton. The upsized-cooling coil ensures a 10% improvement in cooling capacity and hence leads to a 10% power saving as well. Features Here are some of the features that make the HiSen Packaged Airconditioner a high-end, superior quality product. Efficient heat transfer cooling coil, with enhanced surface area: The inner grooved copper tubes with mechanically bonded slit aluminum fins ensure efficient heat transfer. The upsized-cooling coil offering enhanced surface area ensures removal of the high sensible heat and handles a higher indoor air volume of 550 CFM per ton. Higher capacity evaporator fan: Optimally selected DIDW forward curved centrifugal type fan exclusively designed for delivering more air volume at 550 CFM/ton with low noise levels. Optimum expansion valve: Optimally selected expansion valve with accurate preset super heat settings, minimizes splash gas and eliminates the problem of improper cooling in the evaporator. Corrosion resistant blue fin condenser: The special precoated Blue Fin Condensers can take on the harsh combination of salty air, rain and other corrosive atmospheres. They are tested for 500 hours of salt spray as per international standard JIS-Z-2371. Energy efficient scroll compressors: Scroll type, hermetically sealed highly energy efficient Copeland compressors. Acoustically treated and polyester powder painted panels: High density rigid acoustic board insulation, with over layer protection, dampens the unit noise in the plant room. The panels are finished with glossy polyester powder paint, for longer life. Ready-made air outlet flange connections: Units are provided with readymade flanged air outlets, to enable ease of connection to the canvas or the duct flange. Safety alarms and controls: Built in safety features in the compressor and in the refrigeration circuits ensure high level of protection to the unit.
  • 11. TECHNICAL MANUAL 9 Advanced Microcomputer Controller The advanced microcomputer controller offers the following user-friendly features: • Run time equalization: Calculates and ensures equal run time for all compressors. • Auto restart after power failure: No inconvenience of manual restart. • Memory back up: Keeps settings intact during power failures and stoppages. • Built-in-time delay: Protects compressor from instant stops and starts. • Single phasing and reverse phase protection: Protects compressors from damage. • Fuzzy logic: Cools intelligently based on the heat load, and hence increases efficiency. • Self-fault diagnostics: Displays system trips, facilitating faster corrective action. • Easy hook-up with fire alarm system: Potential free contacts provided for hooking on to the fire alarm system, for stopping the units in the event of a fire.
  • 12. PACKAGED ACs & DUCTED SPLITS 10 Scroll Compressor Technology The scroll technology is the most advanced compression technology with only three moving parts and with 100 % volumetric efficiency ideally suitable for most rugged commercial and industrial applications. Scroll compressors have much better liquid refrigerant handling capability than the other types of compressors due to the nature of scroll design. Scroll compressor durability and reliability as well as its quiet operation are inherent with the design of the scroll compressor. The ‘Tandem Scroll’ Scroll-compressor-driven Packaged Airconditioners a few years ago paved the way for the migration of the AC industry to a more energy efficient cooling platform, the Tandem Scroll airconditioning system. A tandem scroll compressor consist of two individual compressors, mounted on a common base, manifolded in to a single refrigerant circuit. A tandem compressor (set) has the common suction, discharge, oil and also additional crank gas equalizer lines between the two compressors. For example, two scroll compressors are linked in tandem to form one tandem scroll compressor. Tandem Compressor
  • 13. TECHNICAL MANUAL 11 In a conventional multi-circuit air conditioning system (as in a 11 ton Scroll Packaged AC), two 5.5-ton compressors drive two independent circuits, each with its own evaporator and condenser, each circuit rated to 5.5 tons. In a tandem scroll air conditioner, the 11-ton tandem scroll drives just one circuit, which therefore consists of just one condenser and evaporator, both of which are however designed for the full capacity of 11 tons. Full Load Operation Under full load conditions, the tandem scroll machine and the conventional scroll machine behave almost identically. Part Load Operation The entire picture changes dramatically under part-load conditions. Part-load conditions are those that prevail when an air-conditioned space is not fully occupied or used with less occupancy, as for example a half-full theatre or an empty showroom. In such cases, the entire capacity of the installed air conditioning system is not required to cool the premises. In both conventional and tandem scroll machines, one of the two compressors switches off under part-load conditions. However, in the tandem scroll system, the compressor that remains on utilizes the entire fully rated condenser for cooling purposes. This seemingly minor fact is a significant air conditioning innovation, remarkably increasing operating efficiency to the extent of 23%! The tandem scroll advantage • Under favourable conditions, a compressor not only delivers higher tonnage, but consumes less power thus giving a dramatic increase in EER • Under part-load conditions, using the double-capacity rated condenser is a ‘favourable operating condition’ for the compressor. Tandem Scroll compressors should therefore deliver a higher EER under part-load conditions.
  • 14. PACKAGED ACs & DUCTED SPLITS 12 Operating Instructions: Floor-Mounted Packaged ACs CONTROLLER SPECIFICATIONS A) Salient Features 1. Digital control and setting of temperature values in 1o C. 2. Automatic selection of compressors with run time Equalization. 3. Non Volatile Memory backup for all set value parameters. 4. Automatic starting of unit in case of power failure. 5. Built-in time delays for Compressor and fan. 6. Built-in Single phase/phase reversal protection. B) Specifications 1. Power supply Single phase, Voltage: 175 to 260 V AC. Frequency: 50 Hz + 3% 2. Operating temperature limit 0 - 65o C 3. Display 2 Digit 7-Segment LED Display, LED indicators and touch key pad 4. Temperature control accuracy + 1% 5. Set temperature range 19 - 32o C 6. Temperature sensors NTC thermister bit sensor with 5 meter long cable 7. LED Display & Keypad HANDSET Pendant mounting 8. Micro Computer Base unit Base mounting (enclosed in fire-retardant box) C) Description of LED Indicators & Keys on Handset LED indicators & keys available on keypad of the PKG unit handset are as follows: Reset LED : This LED indicator flashes green once if any key is pressed. In case of any fault, green flashes continuously. FAN (Ev) LED : If Blower Fan is ON, this LED indicator is Green and Red if it is OFF. FAN MODE LED : If Fan Mode is Selected, then only this LED indicator glows blue. COOL MODE LED : If Cool Mode is Selected, then only this LED indicator glows blue. COMPR 1,2,3 LED : If Compr 1, 2, 3 are ON, this LED indicator is Green, and Red it it is OFF. ON/OFFLED : This indicator is green if the unit is in ON mode and Red if it is in OFF. UP/DN Key : These keys are used to increment values of the selected parameter.
  • 15. TECHNICAL MANUAL 13 AC MODE Key : This key is used for selecting either Fan or Cool Mode. ON/OFF Key : This key is used for switching ON or OFF the unit. RESET Key : This key is used for resetting a Fault or for restarting the unit after removing the existing fault. D) Setting of Temperature The 2-digit seven-segment display shows Actual Return Air Temperature. To view Set Temp, press UP/DN key once. At any time of operation, if no key is pressed for next successive 10 seconds, the display will show Actual Return Air Temperature. Temperature can be set between 19 to 32o C by pressing the UP/ DN keys. After you press UP or DN key Display will indicate the old setting. Press desired key to set new values. As soon as you reach the desired Temperature stop adjusting the keys. The digits will start blinking for 5 seconds. When the blinking stops the LED will show the Actual Return Air Temperature. Recommended Temperature for optimum comfort and power saving is 24 +/- 1o C. E) Fault & Alarms Display LED indicators display various faults occurring in the unit as follows. Nature of Fault Display on LED LED indication on Keypad & correction of Fault. SPPR Fault SP Pr (scrolling) RESET LED indicators will flash after the fault is cleared, now press Reset Key to restart the unit. Cooling Tower Ct Co LED indicators will flash Red if the Fault fault exists. After the fault is cleared, unit restarts automatically. Fan Overload BF Ev LED indicator will flash Red if the Fault fault exists. After the fault is cleared, unit restarts automatically. Cond Fan1 MCB CF COMPR 1 LED indicator will flash Red trip/off Fault if the fault exists. After the fault is cleared, unit restarts automatically. Cond Fan2 MCB CF COMPR 2 LED indicator will flash trip/off Fault Red if the fault exists. After the fault is cleared, unit restarts automatically. Cond Fan3 MCB CF COMPR 3 LED indicator will flash trip/off Fault Red if the fault exists. After the fault is cleared, unit restarts automatically.
  • 16. PACKAGED ACs & DUCTED SPLITS 14 Compr 1 Fault HP LP COMPR 1 LED indicator will flash High/Lo Pressure (scrolling) Red if the fault exists. RESET LED indicator will flash after the fault is cleared, now press Reset Key to restart the unit. Compr 2 Fault HP LP COMPR 2 LED indicator will flash High/Lo Pressure (scrolling) Red if the fault exists. RESET LED indicator will flash after the fault is cleared, now press Reset Key to restart the unit. Compr 3 Fault HP LP COMPR 3 LED indicator will flash High/Lo Pressure (scrolling) Red if the fault exists. RESET LED indicator will flash after the fault is cleared, now press Reset Key to restart the unit. Temp sensor is tH IF Temp sensor is open or bad then open or bad. only LED will display Fault. This fault is Auto reset.
  • 17. TECHNICAL MANUAL 15 F) Operating Instructions Switch ON the unit by pressing ON/OFF key. ON LED will glow Green. To Start Evaporator Blower (FAN Mode) Press AC MODE Key to select the FAN Mode. FAN Mode LED will glow. The Blower Fan will come on immediately (if fan overload relay is not tripped.) To Start Compressor (COOL Mode) Press AC MODE Key once again to select the COOL Mode. COOL Mode LED will glow & Fan Mode LED will be Off. The compressor will come on with pre-set delay of 2 minutes. In case of multi compressor system the 2nd & 3rd compr. will come on after additional 15 sec. delay per compressor. Simultaneously the compressor indication starts blinking Green & then glow continuously thereafter. The Controller will select the number of compressors to be on based on Actual Room Temp & Set Temp. as follows: If actual Temp =/> Set Value + 3, all the Compressors will be ON. If actual Temp =/< Set Value + 2, only two Compressors will be ON. If actual Temp =/< Set Value + 1, only one Compressor will be ON. If actual Temp =/< Set Value - 1, all the Compressors will be OFF. Fan Mode LED Cool Mode LED ON/OFF Key
  • 18. PACKAGED ACs & DUCTED SPLITS 16 Operating Instructions: Ducted Split ACs CONTROLLER SPECIFICATIONS A) Salient Features 1. Digital control and setting of Temperature values in 1 Deg. C. 2. Automatic selection of compressors with run time Equalization. 3. Non Volatile Memory backup for all set value parameter. 4. Automatic starting of unit in case of power failure. 5. Built-in time delays for Compressor and Fan. B) Specifications 1. Powers supply Single Phase, Voltage: 185 to 260 V AC. Frequency: 50 Hz ±3% 2. Operating temperature limit 0 - 65°C 3. Display 2 Digit 7-Segament LED Display, LED indicators and touch key pad 4. Temperature control accuracy ± 1% 5. Set temperature range 19 - 32°C 6. Temperature sensors NTC thermister Bit sensor with 5 meter long cable 7. LED Display & Keypad HANDSET Pendant mounting 8. Micro Computer Base Unit Base mounting (enclosed in fire-retardant box) C) Description of LED Indicators & Keys on Handset Reset LED : This LED indicator flashes once green if any key is pressed, or in case of any fault, flashes green continuously. FAN (Ev) LED : If Blower Fan is ON, this LED indicator is Green and Red if it is OFF. FAN MODE LED : If Fan Mode is Selected then only this LED indicator will glow blue. FAN SPEED LED : If Fan Speed is Selected LO then only this LED indicator will glow ( LO / HI ) Yellow and if selected HI then LED indicator will glow Blue. COOL MODE LED : If Cool Mode is Selected then only this LED indicator will glow blue. COMPR 1,2,3 LED : Compr 1,2,3 is ON, this LED indicator is Green and Red if it is OFF. ON/OFF LED : This indicator is Green if the unit is in ON mode and Red if it is OFF. UP/DN Key : These keys are used for increment / decrement value of the selected parameter.
  • 19. TECHNICAL MANUAL 17 AC MODE Key : This key is used for selecting either Fan or Cool Mode. ON/OFF Key : This key is used for switching ON or OFF the unit. FAN SPEED Key : This key is used for switching Fan speed High/Low. RESET Key : This key is used for resetting the Fault or for restarting the unit after removing the existing fault. D) Setting of Temperature The 2-digit seven-segment display will show the Actual Return Air Temperature. To view Set Temp. press UP/DN key once. At any time of the operation, if no key is pressed for next successive 10 seconds, the display will show Actual Return Air Temperature. Temperature can be set between 19 to 32 Degree Centigrade by pressing UP/DN keys. After you press UP or DN key Display will indicate the old setting. Press desired key to set new values. As soon as you reach the desired Temperature stop adjusting the keys. The digits will start blinking for 5 seconds. When the blinking stops the LED will show the Actual Return Air Temperature. Recommended Temperature for optimum comfort and power saving is 24 +/- 1 Deg. Cen. E) Fault & Alarms Display LED indicators displays the various faults occurring in the unit are as following. Nature of Fault Display on LED LED indication on Keypad & correction of Fault. SPPRFault SP Pr (scrolling) RESET LED indicator will flash after the fault s cleared, now press Reset Key to restart the unit. Cond Fan MCB CF Co LED indicator will flash Red if the fault trip/off Fault exists. This fault is Auto reset (Only for DSA 903 Model) Compr 1 Fault HP LP COMPR 1 LED indicator will High/Lo Pressure (scrolling) flash Red if the fault exists.RESET LED indicator will flash after the fault is cleared, now press Reset Key to restart the unit. (Not for DSA903) Compr 2 Fault HP LP COMPR 2 LED indicator will flash Red High/Lo Pressure (scrolling) if the fault exists.RESET LED indicator will flash after the fault is cleared, now press Reset Key to restart the unit. (Not for DSA903) Temp sensor is tH IF Temp sensor is open or bad then only LED open or bad. will display Fault. This fault is Auto reset.
  • 20. PACKAGED ACs & DUCTED SPLITS 18 F) Operating Instructions Switch ON the unit by pressing ON/OFF key. ON/OFF key LED will glow Green. To Start Evaporator Blower (FAN Mode): Press AC MODE Key to select the FAN Mode, then FAN Mode LED will glow. The Blower Fan will come on immediately. To Start Compressor (COOL Mode): Press AC MODE Key once again to select the COOL Mode, then COOL Mode LED will glow & Fan Mode LED will be Off. The compressor will come on with pre-set delay of 1 minutes. In case of multi compressor system the 2nd & 3rd compr. will come on after additional 10 sec. delay per compressor. Simultaneously the compressor indication will start blinking in Green for time period stated & glow continuously thereafter. Controller will select number of compressors based on Actual Room Temp & Set Temp. as following If Actual Temp =/> Set Value + 3, all the Compressors will be ON. (Only for DSA 903) If actual Temp =/< Set Value + 2, only two Compressors will be ON. (for DSA 903 / 1322) If actual Temp =/< Set Value + 1, only one Compressor will be ON. If actual Temp =/< Set Value - 1, all the Compressors will be OFF. On/Off Key Fan Mode Cool Mode Speed HI Speed LO
  • 21. TECHNICAL MANUAL 19 Filter Water hose Inspection & Routine Maintenance Regular inspection of the IDU and ODU reduces failures and assures continuous operation. A ‘healthy’ supply CHECK IF INCOMING POWER IS AS PER THE RATED POWER SUPPLY: VOLTS 380-420V PHASE THREE PHASE CYCLES 50 Hz TYPE AC ONLY Regular inspection Regular inspection must be carried out as follows: Item Period Inspection Procedure Filter cleaning Once a week Pull out from top ends and lift to remove the front GRILLE from the UNIT. Then remove the internal filter and wash it with water. Dry the filter in the shade and re-install it. Slide the filter from lifting upwards and wash it with water. Dry the filter in the shade and re install it. For Packaged AC For Ducted Split AC
  • 22. PACKAGED ACs & DUCTED SPLITS 20 Item Period Inspection Procedure For Packaged AC For Ducted Split AC Gas leak check Twice a year Remove the grille and front bottom cover and conduct test for gas leaks in all refrigerant pipe joints. For Packaged AC Gas leak check Four times a year For Ducted Split AC Remove the cover from the bottom and conduct test for gas leaks inside portion of the coil and remove filter for outer portion. Indoor Unit Outdoor Unit Test for leaks in condenser coil tubes and also compressor joints. General compressor Twice a year Oil leaks... checks Verify that there are no oil leaks. Crank case heater...Touch the heater body to verify that it is warm. Vibration isolation rubber ... Inspect the vibration isolation rubber for wear. Oil leaks... Verify that there are no oil leaks. Vibration isolation rubber ... Inspect the vibration isolation rubber for wear. Check for bolts tight at the mounting legs.
  • 23. TECHNICAL MANUAL 21 Condenser Coil Four times and outdoor unit a year Thorough cleaning of coil and the overall unit can reduce atmospheric dust pollution and improves performance. Item Period Inspection Procedure For Packaged AC Electrical circuits Four times Check all wires/cables and connector & terminals a year terminals are tight with screwed ends. If not, tighten and pull the wire for proper grip/ holding. Condenser Once in a Clean the condenser coils with portable coils month blower to blow out dust. This improves the performance. For Ducted Split AC
  • 24. PACKAGED ACs & DUCTED SPLITS 22 Troubleshooting Faults and complaints in Packaged AC systems can be broadly classified under three areas. The first step in troubleshooting is to identify the area and diagnose the fault. Diagnosing faults Malfunctions can be classified under any of the following: A. The Electrical Circuit The malfuntioning of electrical circuit is due to LOW or HIGH voltage variations, frequent power failures, loose electrical contacts, defective electrical components, etc. Proper periodical maintenance of the unit will reduce such malfunctioning. Problems due to power supply quality must be sorted out with the concerned electricity board. B. The Refrigeration Circuit Improper cooling usually indicates poor performance of the refrigeration circuit. Reasons may be poor servicing, low/high gas in the system, noncondensible gases, and lower efficiency of the compressor. Periodical service helps avoid such problems. The troubleshooting chart that follows will help isolate the exact fault and suggest remedies. C. The Conditioned Air Circuit Less air flow, poor cooling, uneven temperature, excessive airleaks are complaints that come under this classification. Most of them can be eliminated by periodical servicing. The troubleshooting chart that follows will help isolate the exact fault and suggest remedies. Quick-check Troubleshooting Chart SYMPTOMS CAUSE REMEDY 1. COMPRESSOR HIGH DISCHARGE PRESSURE Non condensible gases Purge the system Over charged refrigerant Remove excess Choked condenser fins Clean the ODU coil Less ODU airflow Correct fan direction LOW DISCHARGE PRESSURE Low refrigerant charge Check for leaks, repair and recharge Low compression efficiency Replace compressor. HIGH SUCTION PRESSURE Excessive load Reduce fresh air & load Defective suction valves Replace compressor (continued)
  • 25. TECHNICAL MANUAL 23 SYMPTOMS CAUSE REMEDY (continued) LOW SUCTION PRESSURE Clogged suction strainer Clean/replace strainer No cooling load Check thermostat Choked air filter Clean air filter COMPRESSOR SHORT CYCLES ON LOW PRESSURE Thermostat erratic Check thermostat COMPRESSOR TRIPS ON HIGH PRESSURE Air in the system Purge the system Overcharged gas Remove excess charge Condenser fan not working Check ODU performance COMPRESSOR NOISY Liquid knock Check return air filter/ Check for coil chokeup Defective valve reeds Replace compressor SCROLL COMPRESSOR COMPRESSOR PRESSURE Compressor motor working Interchange any two DOES NOT BUILD UP TO in reverse rotation phases of polarity for HIGH PRESSURE changing direction COMPRESSOR PRESSURE — Do— —Do— DOES NOT GO DOWN ON LOW PRESSURE COMPRESSOR NOISY — Do— —Do— 2. BLOWER FAN MOTOR NOT STARTING Check power supply/fuses Restore power supply TRIPPING ON OVER LOAD Check over load relay Reset relay Fuse blown Check electrical circuit and replace 3. OVERALL UNIT NOISY OPERATION Blower touching scroll Realign blower Bearing noise Lubricate bearings Belt loose Tighten the belt
  • 26. PACKAGED ACs & DUCTED SPLITS 24 SYMPTOMS CAUSE REMEDY Loose panels Check & tighten screws UNIT OPERATES CONTINOUSLY Shortage of refrigerant Charge gas Defective thermostat Replace thermostat Unit undersized Recheck heatload 4. CONDITIONED AREA DISCOMFORT IN THE CONDITIONED AREA Less air flow Check air filter / belt High humidity Regulate fresh air Poor cooling Check refrigeration circuit TOO WARM IN CONDITIONED SPACE Excess heat load Check & regulate heat load Inadequate cooling Check compressor ‘ON’/ Check filter choke up Less airflow Check reversal of blower fan Compressor trips soon Change incoming supply after start phase polarity on any two phases (for scroll compressor) TOO COLD IN CONDITIONED SPACE Defective thermostat Replace thermostat Contactor stuck up Replace contactor
  • 28. PACKAGED ACs & DUCTED SPLITS 26 Troubleshooting the Water Circuit SYMPTOMS CAUSE REMEDY EXCESSIVE WATER DRIFT UNUSUAL FAN DRIVE VIBRATION FAN NOISE SCALE OR FOREIGN SUBSTANCE IN WATER SYSTEM Faulty drift elimination Over-pumping Loose bolts & cap screws Fan Motor Loose fan hub cover Insufficient blow down Poor water quality Check to be sure all Louvres, Eliminator Sections or slats and splash retainers are in place. Top deck assemblies and wood fill splash bars must be intact and level. There must be no tendency to channel water. Fill packs must be intact and in place with no sagging or gaps between packs. Reduce water flow to tower to design conditions or use larger metering orifices. Tighten all bolts and cap screws on all mechanical equipment and supports. Be sure blades are properly positioned in correct sockets. Check match numbers. Make certain all blades are as far from centre of fan as safety devices permit. All blades must be pitched the same. Clean-off deposit build up on blades. Disconnect load and operate motor. If motor still vibrates, check for bent shaft or unbalanced rotor. Replace shaft or rebalance rotor. Tighten fan hub cover fasteners. Check water quality Install Water Treatment System
  • 29. TECHNICAL MANUAL 27 Technical Specifications MODELS Floor-Mounted Packaged ACs HiPer Plus + Packaged Airconditioner DPAP 661S, 1052S, 1322S, 1983S HiSen Packaged Airconditioner DPAN 661S, 1052S, 1322S, 1983S Tandem Packaged Airconditioner DPAY 1321S, 1982S Air Cooled Packaged Airconditioner DPA 661BS, 1052BS, 1322BS, 1983BS, 2642S Water Cooled Packaged Aircondionter DPW 661AS, 1322AS, 1983AS Aircooled Ductable Splits with DSA 361D, 601D, 903B Recip. Compressor Air Cooled Ductable Splits with 661DS, 1001BS, 1052BS, 1322DS Scroll Compressor 2642S Water Cooled Ductable Splits with DSW361, 661S, 1052S, 1322S Scroll Compressor and Recip Ducted Splits
  • 30. PACKAGED ACs & DUCTED SPLITS 28 HiPer Plus (Hi Sensible Air-cooled Packaged Airconditioners with Scroll Compressors & High EER Condensers) Model Units DPAP-661S DPAP-1052S DPAP-1322S DPAP-1983S Nominal Cooling Capacity KCAL/HR 16500 26250 33000 49500 TR 5.5 8.75 11 16.5 4 Wire System-415V -3PH-50Hz Indoor Unit Dimensions W x D x H (mm) 900 x 660 x 1700 1160 x 660 x 1700 1500 x 750 x 1800 1500 x 930 x 2000 Cooling Coil Internally Grooved Copper Tubing with Slit Fins Blower Fan Centrifugal Nominal Airflow CMH 4675 7450 9350 14025 Fan Motor Watts 560 1500 2250 3000 Compressor Type Scroll Quality 1 2 2 Conrol Panel Inbuilt External Static 6 7.5 8 10 Outdoor Unit (high ambient) Dimensions W x D x H (mm) 1020 x 406 x 1270 1020 x 406 x 1270 1020 x 406 x 1270 1020 x 406 x 1270 Condenser Coil Inner Grooved with Slit Fins-Anti Corrosion Coating Quantity 1 2 2 3 Condenser Fan Type Propeller Nominal Airflow CMH 7500 7500 7500 7500 Fan Motor Watts 188 188 188 188 Quantity 2 2 2 2 Indoor Unit Weight Kg 195 295 470 600 Outdoor Unit Weight Kg 75 75 75 75 Safety Devices for Inbuilt Internal Thermal Protector Compressor Protection Internal Pressure Relief Valve High Pressure Cutout Low Pressure Cutout Refrigerant Piping/Elecrical Hard Drawn Grade - ‘L’ Copper Tubes Only Hot Gas Line Od Inches X Gauge 7/8 “ X 16G 7/8 “ X 16G 7/8 “ X 16G 7/8 “ X 16G Liquid Line 5/8 “ X 19G 5/8 “ X 19G 5/8 “ X 19G 5/8 “ X 19G Condensate Drain GI / PVC 32mm 32mm 32mm 32mm MCB Rating 32A 40A 40A 63A80A Power Cable Incoming Copper 4Cx6mm Sq Cu 4Cx10mm Sq Cu 4Cx10mm Sq Cu 4Cx16mm SQ CU Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
  • 31. TECHNICAL MANUAL 29 HiSen (Hi Sensible Air-cooled Packaged Airconditioners with Scroll Compressors & Standard Condensers) Model Units DPAN-661S DPAN-1052S DPAN-1322S DPAN-1983S Nominal Cooling Capacity KCAL/HR 16500 26250 33000 49500 TR 5.5 8.75 11 16.5 4 Wire System-415V -3PH-50Hz Indoor Unit Dimensions W x D x H (mm) 900 x 660 x 1700 1160 x 660 x 1700 1500 x 750 x 1800 1500 x 930 x 2000 Cooling Coil Internally Grooved Copper Tubing with Slit Fins Blower Fan Centrifugal Nominal Airflow CMH 4675 7450 9350 14025 Fan Motor Power Watts 560 1500 2250 3000 Compressor Type Scroll Quality 1 2 2 3 Conrol Panel Digital-Micro Controller Type Inbuilt External Static MM 6 7.5 8 10 Outdoor Unit (Normal ambient) Dimensions W x D x H (mm) 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 Condenser Coil Inner Grooved with Slit Fins-Anti Corrosion Coating Quantity 1 2 2 3 Condenser Fan Type Propeller Nominal Airflow CMH 7500 7500 7500 7500 Fan Motor Power Watts 240 240 240 240 Quantity 1 1 1 1 Indoor Unit Weight Kg 195 295 470 600 Outdoor Unit Weight Kg 86 86 86 86 Safety Devices for Inbuilt Internal Thermal Protector Compressor Protection Internal Pressure Relief Valve High Pressure Cutout Low Pressure Cutout Refrigerant Piping/Electrical Hard Drawn Grade - ‘L’ Copper Tubes Only Hot Gas Line Od Inches X Gauge 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g Liquid Line 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g Condensate Drain GI/PVC 32mm 32mm 32mm 32mm MCB Rating 32A 40A 63A 63A Power Cable Incoming Copper 4Cx6mm Sq Cu 4Cx10mm Sq Cu 4Cx10mm Sq Cu 4Cx16mm Sq Cu Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
  • 32. PACKAGED ACs & DUCTED SPLITS 30 Air-cooled Packaged Airconditioners (With Scroll Tandem Compressors) Model Units DPAY-1321S DPAY-1982S Nominal Cooling Capacity Kcal /Hr 33000 49500 TR 11 16.5 Indoor Unit Dimensions W X D X H (mm) 1160 X 660 X 1700 1500 X 750 X 1800 Cooling Coil Blower Fan Centrifugal Nominal Airflow CMH 7480 11220 Fan Motor Watts 1500 2250 External Static mm 8 9 Compressor Type Scroll Scroll Quantity 1tandem 1 Tandem + 1 Single Safety Devices For Inbuilt Internal Thermal Protector Compressor Protection Internal Pressure Relief Valve High Pressure Cutout Low Pressure Cutout Control Panel Digital -micro Cotroller Type Outdoor Unit Dimensions W X D X H (mm) 1020 X 406 X 954 1020 X 406 X 954 Quantity 2 3 Condenser Fan Type Propeller Propeller Nominal Airflow CMH 7500 7500 Fan Motor Watts 240 240 Quanity 1 1 Indoor Unit Weight Kg 305 503 Outdoor Unit Weight Kg 86 86 Refrigerant Piping/Elecrical Hot Gas Line Od Inches X Gauge 1 1/8 “ X 16g 1 1/8 “ Tandem & 7/8” Solo 16 g Liquid Line 5/8 “ X 19g 5/8 “ X 19g Both Condensate Drain GI / Pvc 32mm 32mm MCB Rating 40A 63A Power Cable Incoming Copper 4cx10mm Sq Cu 4cx16mm Sq Cu Earthing Double Loop 2 X 8 G Gi Wires 2 X 8 G Gi Wires
  • 33. TECHNICAL MANUAL 31 Air-cooled Packaged Airconditioners (With Scroll Compressors) New Model Units DPA-661BS DPA-1052BS DPA-1322BS DPA-1983BS DPA2642S Nominal Cooling KCAL/HR 16500 26250 33000 49500 66000 Capacity TR 5.5 8.75 11 16.5 22 4 Wire System-415V -3PH-50Hz Indoor Unit Dimensions WxDxH (mm) 900 x 660 x 1700 1160 x 660 x 1700 1160 x 660 x 1700 1500 x 750 x 1800 1500 x 930 x 2000 Cooling Coil Internally Grooved Copper Tubing with Slit Fins Blower Fan Centrifugal Nominal Airflow CMH 3740 5900 7480 11220 14960 Fan Motor Power Watts 560 1100 1500 2250 3000 Compressor Type Hermetically Sealed Scroll Quality 1 2 2 3 2 Conrol Panel Digital-Micro Controller Type (Inbuilt) External Static MM 6 7.5 8 9 10 Outdoor Unit (Normal ambient) Dimensions W x D x H (mm) 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 1020 x 406 x 954 1435 x 620 x 947 Condenser Coil Inner Grooved with Slit Fins-Anti Corrosion Blue fin coated Quantity 1 2 2 3 2 Condenser Fan Type Propeller Nominal Airflow CMH 7500 7500 7500 7500 17000 Fan Motor Power Watts 240 240 240 240 260 Quantity 1 1 1 1 2 Indoor Unit Weight Kg 195 295 302 438 580 Outdoor Unit Weight Kg 86 86 86 86 120 Safety Devices for Inbuilt Internal Thermal Protector Compressor Internal Pressure Relief Valve Protection High Pressure Cutout Low Pressure Cutout Refrigerant Piping/Elecrical Hard Drawn Grade - ‘L’ Copper Tubes Only Hot Gas Line Od Inches X 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g 7/8 “ X 16g 1 1 / 8 “X 16g Gauge Liquid Line 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g 5/8 “ X 19g 7 / 8 “ X 19g Condensate 32mm 32mm 32mm 32mm 32mm Drain Gi / PVC Mcb Rating 32A 40A 40A 63A 80A Power Cable Copper 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu 4cx16mm Sq Cu 4cx25mm Sq Cu Incoming Earthing Double 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires Loop
  • 34. PACKAGED ACs & DUCTED SPLITS 32 Water-cooled Packaged Airconditioners (With Scroll Compressors) Model Units DPW-661AS DPW-1322AS DPW1983AS Nominal Cooling Capacity KCAL /HR 16500 33000 49500 TR 5.5 11 16.5 Dimensions WxDxH (mm) 900x660x1700 1160x660x1700 1500x750x1800 Weight Kg 253 390 556 Compressor Type Scroll Scroll Scroll Type Quantity 1 2 3 External Static mm 6 8 9 Compressor Protection Inbuilt Internal Thermal Protector Internal Pressure Relief Valve High Pressure Cutout Low Pressure Cutout Oil Charge (Ltrs) Ltrs 1.77 1.77 1.77 Power Supply 380 / 420 V, 3 Phase, 50 Hz AC Operating Voltage 342 / 462 Mounting Arrangement 4 Nos Rubber Mounts With Sleeves Compressor Wt. Kgs 38.1 38.1 38.1 Evaporator Coil Fin Material Aluminium 0.16mm Thick Tube Material Copper Tube Dia Mm / Inches 9.5 / 3/8" Evaporator Blower Blower Fan Centrifugal Forward Curved Double Inlet Nominal Airflow CMH 3740 7480 11220 Fan Motor Watts 560 1500 2250 Blower Size (Od Xlg) mm 305 X 229 305 X 305 381x 381 No Of Blowers Qtty 1 1 1 Motor Rpm 1440 Expansion Device Thermostatic Expansion Valve With External Eqaliser Air Filter Size mm 517x828x10 517x828x10 457x933x10 No Of Filters Nos 1 2 3 Condenser Water Cooled Type Tube Material/ Od Cu / 3/4"Od Cu / 3/4"Od Cu / 3/4"Od Quantity 1 1 1 Water Connections In & Out Bsp Mm 32 Mm Refrigerant Conn. -Hs Od Cu Inches 1/2" / 3/8" 1/2" / 3/8" 1/2" / 3/8" Inlet/ Liquid Fusible Plug Size / mm / Deg C 9.5mm/91 ºC Melting Temp. Drain Plug And Vent mm Fpt 6.3 Mm / 1/4" Water Quantity Usgpm 20 40 60 Pressure Drop Psig 3.5 9 10 Fouling Factor Sq. Ft. Hr. 0.0005 Deg. F/Btu Drain Piping/Elecrical GI/ Class B Pipes Condensate Drain 32mm 32mm 32mm GI / PVC MCB Rating 32A 40A 63A Power Cable Incoming Copper 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx16mm Sq Cu Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires
  • 35. TECHNICAL MANUAL 33 Air-cooled Ductable Split Airconditioners (With Scroll Compressors) Model Units DSA-661DS DSA-1001BS DSA-1052BS DSA-1322DS DSA-2642S Indoor Unit Nominal Cooling Capacity Kcal /Hr 16500 24900 26250 33000 66000 Tr 5.5 8.3 8.75 11 22 Dimensions WxDx H (Mm) 1220x675x450 1525x675x450 1525x675x450 1850x675x450 2160x1225x690 Indoor Unit Weight Kg 68 96 96 127 230 Evaporator Coil Fin Material Aluminium 0.16mm Thick Tube Material Copper Tube Dia Mm / Inches 9.5 / 3/8" Evaporator Blower Blower Fan Centrifugal Forward Curved Double InletCentrifugal Forward Curved Double Inlet Nominal Airflow Cmh 3740 5650 5900 7480 14960 Fan Motor Watts 375 375 Each 375 Each 375 Each 375 Each Blower Size (Od Xlg) Mm 270x270 270x270 270x270 270x270 305x229 No Of Blowers Qtty 1 2 2 2 3 Air Outlet Size Mm 280x345 280x920 280x920 280x1095 342x1650 Expansion Device Thermostatic Expansion Valve With External Eqaliser Air Filter Size Mm 563 X 403 468x403 468x403 593x403 645x595 No Of Filters Nos 2 3 3 3 3 Speed Rpm Rpm 920/870 920/870 920/870 920/870 920/870 Outdoor Unit Dimensions WxDx H (mm) 1020x406x954 1380x856x557 1020x406x954 1020x406x954 1435x620x947 Compressor Type Scroll Scroll Scroll Scroll Scroll Type Quantity 1 1 2 2 2 Power Input Each Kw 5.25 7.86 4.14 5.25 10.5 Compressor Compressor Protection Inbuilt Internal Thermal Protector Internal Pressure Relief Valve High Pressure Cutout Low Pressure Cutout Oil Charge (Ltrs) Ltrs 1.77 3.25 1.77 1.77 3.25 Power Supply 380 / 420 V , 3 Phase, 50 Hz Ac Operating Voltage 342 / 462 Mounting Arrangement 4 Nos Rubber Mounts With Sleeves Compressor Wt. Kgs 38.1 69.4 35.4 38.1 62.6 Condenser Coil 3/8" (9.5mm) Cu Tubes And 0.16 Mm Thick Al Fins Quantity 1 2 2 2 2 Condenser Fan Type Four Blade Propeller Fan Nominal Airflow Cmh 7500 10200 7500 7500 17000 Fan Motor Watts 240 586 240 240 260 Quanity 1 1 1 1 2 Weight Kg 107 188 107 107 220 Refrigerant Piping/ Hard Drawn Grade - ‘L’ Copper Tubes Only Elecrical Suction Line Od InchesxGauge 7/8 “ X 19g 1 1/8 “ X 19g 3/4 “ X 19g 7/8 “ X 19g 1 3/8 “X 19g Liquid Line 5/8 “ X 19g 5/8 “ X 19g 1/2 “ X 19g 5/8 “ X 19g 7/8 “ X 19g Condensate Drain 25mm 25mm 25mm 25mm 25mm GI / PVC Mcb Rating 32A 40A 40A 40A 80A Power Cable Incoming Copper 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu 4cx25mm Sq Cu Earthing Double Loop 2 X 8 G Gi Wires 2 X 8 G Gi Wires 2 X 8 G Gi Wires 2 X 8 G Gi Wires 2 X 8 G Gi Wires
  • 36. PACKAGED ACs & DUCTED SPLITS 34 Model Units DSA -361D DSA-601D DSA -903B Nominal Cooling Capacity KCAL /HR 9000 15000 Tr 3 5 7.5 Indoor Unit Dimensions WxDxH (mm) 915x660x375 1219x660x457 1525x660x457 Cooling Coil Inner Grooved Copper Tubing With Slit Fins Blower Fan Centrifugal Nominal Airflow CMH 2040 3400 5100 Fan Motor Watts 188 375 750 Quantity 1 1 1 Speed - Rpm 2-1200/1150 2-920/870 2 - 1200 /1150 Power To Fan Motor 230 V - 1 Ph - 50 Hz External Static mm 4 5 7.5 Outdoor Unit Dimensions WxDxH (Mm) 1020x406x686 1020x406x954 1360x550x856 Quantity 1 1 Power Supply Source 415 V -3 Ph - 50HZ Compressor Hermetically Sealed Recip Compressor Quantity 1 1 3 Condenser Fan Type Propeller Nominal Airflow CMH 4000 6800 -- Fan Motor Watts 105 188 188 Quanity 1 1 2 Controller Elec. Micro Processor Pendant Controller Di. Pendant Controller Indoor Unit Weight Kg 60 86 96 kg Outdoor Unit Weight Kg 80 112 220 Refrigerant Piping/ Hard Drawn Grade - ‘L’ Copper Tubes Only Elecrical Suction Line Od Inches X Gauge 3/4 “ X 19g 7/8 “ X 19g 5/8 “ X 19g Liquid Line 3/8 “ X 19g 5/8 “ X 19g 3/8 “ X 19g Condensate Drain 25mm 25mm 25mm GI / PVC MCB Rating 32A 32A 40A Power Cable Incoming Copper 4cx6mm Sq Cu 4cx6mm Sq Cu 4cx6mm Sq Cu Earthing Double Loop 2X8 G GI Wires 2X8 G GI Wires 2x8 G GI Wires Air-cooled Ductable Split Airconditioners (With Recip Compressors)
  • 37. TECHNICAL MANUAL 35 Model Units DSW 361 DSW 661S DSW 1052S DSW 1322S Nominal Cooling Kcal /Hr 9000 16500 26250 33000 Capacity Tr 3 5.5 8.75 11 Indoor Unit Dimensions W X D X H (mm) 953 X 585 X 381 1220 X 675 X 457 1525 X 675 X 457 1830 X 675 X 457 Blower Fan Centrifugal Nominal Airflow CMH /CFM 2050/1200 3740/2200 5900/3440 7480/4400 Fan Motor Watts 180 375 375 375 Quantity 1 1 2 2 Speed - Rpm 1200/1100 2 - 920/870 2 - 920/870 2 - 920/870 Power To Fan 230 V - 1 Ph - 50 Hz Motor External Static mm 4 5 6 7 Outdoor Unit Dimensions W X D X H (mm) 983x713x546 Quantity 1 1 2 2 Power Supply 415 V -3 Ph - 50Hz Source Compressor Recip Scroll Quantity 1 1 1 1 Condenser Shell And Tube Water Inlet/Out mm 31.7BSP Let Size Cooling Water Usgpm 11 20 15.5 20 Quantity Controller Electronic Micro Processor Pendant Controller Indoor Unit Weight Kg 60 68 96 127 Outdoor Unit Weight Kg 130 149 144 149 Cds Water Piping/ GI/ Ms Class B Pipes Electrical Condenser Water In 32mm 40mm 32mm 40mm Condenser Water Out 32mm 40mm 32mm 40mm Condensate Drain 25mm 25mm 25mm 25mm GI / PVC Mcb Rating 32A 32A 40A 63A Power Cable Copper 4cx4mm Sq Cu 4cx6mm Sq Cu 4cx10mm Sq Cu 4cx10mm Sq Cu Incoming Earthing Double Loop 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires 2 X 8 G GI Wires Water-cooled Ductable Split Airconditioners (With Recip & Scroll Compressors)
  • 38. PACKAGED ACs & DUCTED SPLITS 36