2
Air cooled chillers
LX
PROPELLER
F
ANS
A I R C O N D I T I O N I N G - R E F R I G E R A T I O N - A I R H A N D L I N G - H E A T E X C H A N G E -
N
N
A
A
0
0
4
4
.
.
5
5
3
3
1
1
B
B
D
ESCRIPTION
POWERCIA
T LX serie
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Compressors
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Accessible hermetic twin screw type
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Optimized profile of rotors ensuring a high efficiency
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Electrical motor incorporated with part
winding starting
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Motor integral electronic protection
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Control of the phases balance and rotation direction
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Integrated overpressure valve
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Discharge temperature control
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Lubrication under controlled pressure
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3-stage integrated oil separator
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Crankcase heater
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Suction filter
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Discharge valve
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Slide for modulating capacity control
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Compressors fitted on antivibration mounts
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Evaporator
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Direct expansion shell and tube type
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High performance copper tubes bundle
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Steel shell
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Corrosion resistant baffles
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Thermal insulation by cellular foam with UV resistant
polyurethane film
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Air cooled condenser
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Copper tubes coils, aluminium fins
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Direct drive propeller fans
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Rotation speed :
905 or 715 rpm
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3 phase electrical motors, IP 54
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HPS (High Power system)
o
on
n
m
mo
od
de
el
ls
s
L
LX
X/
/L
LX
XH
H.
.
.
.
.
.
H
HP
PS
S
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The HPS system allows to increase cooling capacity,
improves the performance coefficients (EER) of your
installation, particulary in part load, and ensures therefore an
optimal operation of POWERCIA
T during all the year.
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Refrigerant accessories
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Filter dryers with rechargeable cartridges
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Liquid sight glasses
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Solenoid valves on liquid refrigerant lines
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Thermostatic expansion valves
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Safety and regulation devices
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HP/LP pressure sensors
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Low and high pressure safety valves
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Chilled water control sensor (inlet or outlet)
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External temperature sensor
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Evaporator antifreeze sensor
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Compressors discharge sensor
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Evaporator water flow switch
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Electrical panel
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IP 44
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Electrical supply 400 V - 3 ph.
- 50 Hz + earth (+/- 10 %)
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Wires numbering and electrical components referencing.
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Main safety switch with outside handle
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Transformer for control circuit
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Compressors motors contactors
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Fans motors contactors
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Compressors motors protection by magneto-thermal circuit
breakers (25 KA or 35 KA depend of sizes of compressors).
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Fans motors protection by magneto-thermal circuit
breakers
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Main electrical ground
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Electronic control with microprocessor Xtra connect
ensuring the following main functions :
- 2 remote switchable set points
- chilled water temperature control
- Possibility of water temperature variation as a function of
the outside temperature (water law)
- Low temperature ice storage control
- Condensing pressure control
- Compressors discharge temperature control
- Compressors anti-short cycle control
- Control and optimisation of operating parameters
- Counting and balancing of compressors, pumps operating
times
- Automaticity control
- LCD display panel, 2 lines of 20 characters allowing :
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parametering of the unit
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direct reading of all informations :
settings, water inlet/outlet
temperatures, outside temperature, HP/LP pressures, unit
operating status...
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Faults control with memorization of the last 9 faults and
operating reading when those faults occur
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Weekly management of the unit
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Unit general fault display on terminals
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Automaticity control on terminals
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RS 485 output for bus connection with centralized Building
Management System(MODBUS/JBUS protocol)
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Capacity control
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Modulating capacity control :
- from 25 to 100 % (sizes 1200Z (HPS) to 2800Z (HPS))
- from 17 to 100 % (sizes 3050Z HPS to 3750Z HPS)
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Frame and casing
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Frame in RAL 7035 and 7024 painted metal sheet
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Casing in RAL 7035 and 7024 lacquered metal sheet
