Models CWP 02 to 35 - WESPER - #2

cable and thermally insulated with closed cell polyurethane foam to provide freeze protection down to ambient temperature of - 20 °C.

The CWP water cooled water chillers are designed to offer 13 sizes for all

small and medium capacity residential, commercial and industrial facilities.

With the use of plate type heat exchangers, the chillers have an extremely compact design, permitting to obtain a very small foot-print.

The unit is fully encased with galvanised steel panels finished in baked paint coloured RAL 7032.

All chillers are designed to be located inside a plant room. Their installation is facilitated by water connections located at the rear side of the machine.

All of these 13 sizes are available in three versions :

1) CWP-CO : "cooling only" chillers require a cooling tower or dry cooler for heat rejection.

2) CWP-RC : "condenserless" chillers require a remote air cooled condenser for heat rejection.

3) CWP-HP : "water-to-water reverse cycle" heat pumps providing the leaving hot water temperatures up to 51 °C (heating mode), useful for sanitary hot water, low temperature heating applications, etc.

All units are completely assembled with all interconnecting refrigerant piping and internal wiring ready for field installation. After assembly, a full factory run test is performed with water flowing through the evaporator and condenser to verify that each refrigerant circuit operates correctly.

They are shipped with a full refrigerant and oil charge (except CWP-RC which is shipped with nitrogen charge).

Refrigerant circuit is supplied with thermal expansion valve, filter drier, sight glass with moisture indicator, non-return valves at compressor discharge side (on size 25 to 35 only), solenoid valve (on CWP-RC only) and high and low pressure switches.

The CWP-HP models have, in addition, reverse cycle 4-port valve, non-return valves and liquid reservoir.

All electrical equipments necessary for full unit operation are located in a compartment of which the access is accomplished through the front of the unit. Access panel is held by fixing screws.

Electrical panel, in compliance with CE standards, includes main disconnect switch with externally lockable handle, compressor contactors and overload protection, control circuit fuses, evaporator thermostat, electronic temperature controller, high & low pressure switches, anti-freeze thermostat (2 pieces on CWP-HP models), anti-short cycle time delay, on/off switch and electrical junction block for power and control circuits.

-» Control circuit transformer (400 V / 230 V), -» Remote fault relay, -» Hour meter,

-» Water flow switch (supplied loose),

-» Lack of water safety pressure switch (evaporator side),

-» HP/LP gauges,

-» Rubber vibration isolators kit,

-» Compressor jacket,

-» Condenser pressostatic valve (size 02 to 21 only),

-» Water isolating valves (supplied loose) - quantity : 4 on CWP-CO & CWP-

HP and 2 on CWP-RC,

-» Supply water external filters (supplied loose) - quantity : 2 on CWP-CO &

CWP-HP and 1 on CWP-RC, -» Chiller sequencer.

-» Remote hydraulic module (sizes 15 to 35 only) with water tank, 1 or 2 low or high pressure pump(s), relevant accessories and with or without antifreeze electric heater.

Compressors are of hermetic Scroll, with a gas cooled motor, crankcase heater (except sizes 02 to 09) and internal motor protection. Sizes 02 to 21 have one compressor, whereas sizes 25 to 35 have two compressors.

All compressors are mounted on rubber anti-vibration pads to minimize noise and vibration transmissions.

Evaporator is of direct expansion type, constituted from stainless steel brazed plate type heat exchanger.

Evaporator is wrapped with an electric resistance heater cable and thermally insulated with closed cell polyurethane foam to provide freeze protection down to ambient temperature of - 20 °C.

Condenser is of stainless steel brazed plate type heat exchanger.

On CWP-HP models, condenser is wrapped with an electric resistance heater