1. Lightstream Screw
WWW.KALTRA.DE
475-1355kW
AIR-COOLED CHILLERS WITH INVERTER SCREW
COMPRESSORS
CLASS A ENERGY EFFICIENCY
MICROCHANNEL CONDENSERS
INVERTER SCREW COMPRESSORS
AVAILABLE WITH R1234ze
AVAILABLE IN 8 FRAME SIZES, TOTAL 18 MODELS WITH A HUGE ARRAY OF OPTIONS AND ACCESSORIES
EC-FANS MICROCHANNELR134a/R1234ze HEAT RECOVERYSCREW INVERTER
2. LIGHTSTREAM SCREW INVERTER CHILLERS OFFER AN ULTIMATE EFFICIENCY AT BOTH FULL AND PARTIAL LOADS BY COMBINING
FREQUENCY-CONTROLLED SCREW COMPRESSORS AND LATEST FAN AND CONDENSER TECHNOLOGIES APPLIED IN MODULAR
W-BANK DESIGN.
Ultimate efficiency at any cooling load
The benefits at a glance:
ENERGY EFFICIENCY RATIO UP TO 3.56
ESEER UP TO 5.75
CAPACITY ON DEMAND
INTELLIGENT HEAD PRESSURE CONTROL
HIGH EVAPORATION TEMPERATURES
LOW CONDENSING TEMPERATURES
ESEER OF UP TO
5.75
Frequency-controlled screw compressors
The compact frequency-controlled screw compressors of Lightstream Screw Inveter
series chillers are especially suitable for systems that frequently operated under
part-load.
These compressors achieve also impressively high full-load efficiency and significant-
ly improved ESEER and SCOP values. With an average ESEER value of 5.62, Lighstream
Screw Inverter chillers are setting new benchmarks in the industry.
The compressors monitors its own application limits and communicate via Modbus
with the master system controls. The integrated data log can be used at any time to
analyse operation over the running time and optimise the system settings.
Exact capacity match
Capacity (%)
COP
0 20 40 60 80 100
3.03.54.04.55.05.56.0
85%
Efficiency of compressors: COP value
Screw compressor
Inverter screw compressor
Lightstream Screw Inverter
Kaltra Innovativtechnik GmbH
Max-Reger-Str. 44 • 90571 Schwaig • Germany
info@kaltra.de
+49(0)911 715 32021
3. Better heat transfer. Lower condensing temperatures. Higher efficiency.
Microchannel condensing coils
Microchannel condensers used in Lighstream Screw Inverter design give a number of advantages, including
higher heat transfer rate, low airside pressure drops, and closer approach temperatures. The end result is up
to 40% higher energy efficiency in comparison to traditional fin/tube heat exchanger design.
Smaller coil face, thin design, up to 50% less weight, and less refrigerant charge translate to lower system
cost. Microchannel condensers used in Lightstream Screw Inverter chillers are true HVAC coils developed and
optimized especially for refrigeration applications and enable remarkable low condensing temperatures.
The new generation fan system not only reduces power consumption by up to 30% while easily managing the extraordinary high volume
flows – it also works at much reduced operating noise.
The smart fan system includes the unique fans with bionic wing concept, the most advanced EC motor technology, and multifunctional air
diffusers, resulting in an extra economic efficiency for the customers.
EC motor technology does not provide savings only during full-load operation - it is exactly when operating under partial load that EC motors
lose much less of their efficiency.
Intelligent fan system
EC-type fans with reduced power consumption
Lightstream Screw Inverter
Kaltra Innovativtechnik GmbH
Max-Reger-Str. 44 • 90571 Schwaig • Germany
info@kaltra.de
+49(0)911 715 32021
Airflow (%)
Powerinput(%)
25 50 75 100
255075100
Fan motors efficiency comparison
AC fans
EC fans
Savings
energy savings through the use of EEV25%
The electronic expansion valve (EEV) reduces the need for high head
pressure when running at part load and lower ambient conditions.
EEV is controlled by a driver which regulates its opening according
to the performance levels required by the system and guarantees
the minimal overheating under all operating conditions.
The control hub of Lightstream Screw Invefter chillers is
a sophisticated controller and advanced software
developed for efficient operation of the chillers based on
screw compressors. It manages and optimizes the
chiller’s performance, giving the complete control over
the system for plant operator.
4. Lightstream Screw Inverter
Kaltra Innovativtechnik GmbH
Max-Reger-Str. 44 • 90571 Schwaig • Germany
info@kaltra.de
+49(0)911 715 32021
Compressors type V Inverter screw
Nominal capacity kW
Condenser W W-bank microchannel
Condenser size No. of condenser banks
Refrigerant circuits No. of refrigerant circuits
Lightstream Screw Inverter V 600 W 6 / 2
Frame size F5 F6 F7 F8 F9 F10 F11 F12
Length mm 5655 6825 7740 8910 9825 10995 11910 13080
Width mm 2250 2250 2250 2250 2250 2250 2250 2250
Height mm 2550 2550 2550 2550 2550 2550 2550 2550
Frame sizes and model identification
Package, options and accessories
Flooded evaporator
The flooded evaporator enables to operate at the higher saturated evaporating temperature
when compared to many others evaporator types and allows achieving higher cooling capacity
with correspondingly higher efficiency.
The refrigerant pool behaves as a flywheel, allowing the controls of the flooded evaporator to
track the varying load of a batch process, while optimized tube geometry ensures optimal
refrigerant distribution.
We use grooved end connections because of their rigidity, flexibility, noise and vibration attenuation, and easy of installation and
maintenance. The groove is made by cold forming or machining a groove into the end of a pipe. A gasket encompassed by the
coupling housing is wrapped around the two grooved pipe ends, and the key sections of the coupling housing engage the grooves.
The bolts and nuts are tightened with a socket wrench or impact wrench.
Grooved connections
■ Standard feature
□ Optional feature
Description
General
Anti-vibration mounts □
Anti-vibration springs □
Soundproof compressor enclosures ■
High-sided paneling □
Waterside
Pumping group (single/twin pump variable/fixed speed) □
Refrigerant side
Oil cooling system / oil pump □
Electronic expansion valves ■
Airside
AC fans ■
Touch screen HMI □
Electric panel heater □
Compressor power factor capacitor □
Soft-start system (fixed-speed compressor) □
Electric and controls
MCHE electrocoat □
MCHE thermoguard □
MCHE mesh guard □
-10°C brine kit □
Pump(s) antifreeze heater □
Service valves (compr. suction/discharge) □
Pressure indication on high/low pressure sides □
EC fans □
Dual power supply w/ ATS □
BMS connectivity ■
SNMP connectivity □
Energy monitoring □
High ambient kit □
Low noise design (grades 1-4) □
Partial heat recovery system □
Total heat recovery system □
Flowmeter □
Thermal insulation ■
High-efficient fan diffusers □
Sequence management □
Compressor operation indication □
Remote monitoring software □
Pumping group control system □
Safety valves on high/low pressure sides □
R1234ze
Refrigerants with low global warming potential (GWP)
are becoming more and more important in the
refrigeration and air conditioning industry in Europe
and beyond.
R1234ze features low GWP of one and zero ozone
depletion potential, thus providing the environmental
leadership while achieving the best energy
performance levels for applications.
