Water
Cooled Reciprocating Liquid Chiller
Condenser:
Water cooled condenser shell & tube type.
The shell is carbon steel and the tubes are integrally
finned thick wall tubing of copper.
The attachment of tubes is made by expansion into grooved
holes provided within the tube sheet.
Working pressures are: 30 bar refrigerant side 10 bar
water side.
Compressors:
Semi Hermetic Compressor type, equipped with automatically
reversible oil pump; refrigerant gas cooled type with
built-in thermal protection, crankcase heater and large
voltage capacity, suitable for 50-Hertz application. Each
compressor is mounted on isolator pads and connected via
flexible-vibration-absorbers to the rest of the cooper
tubing to reduce vibration .
Transmission to the rest of the unit. Compressors are
designed for high-energy efficiency, compact construction,
and rugged reliability, long-life and are maintenance
free. Compressors can be disassembled in the field for
service. Oil level sight glass is standard. Oil electronic
pressure control cuts the power to the motor when the
pressure drops below acceptable limits.
Evaporator:
Direct expansion, shell and tube type with water flowing
through the shell and the refrigerant through the tubes.
Design Working Pressures-shell (fluid) side is 150 psig
; tube (refrigerant) side is 300 psig.
Refrigerant
Piping:
All circuits are made of brazed seamless copper tubes.
Refrigerant circuits include :
1. Manual liquid line shut-off valve.
2. Automatic liquid line shut-off valve.
3. Refrigerant filter-drier.
4. Liquid sight glass/moisture indicator.
5. Liquid line solenoid valve.
6. Thermal expansion valve.
7. Permanent charging ports.
8. Liquid receiver.
9. External muffler.
10. Pressure-relief valve.
Controls:
A weatherproof cabinet harbors all indicator devices,
switches, lamps, as well as most of the relays, contactors,
circuit breakers, electric terminals, etc.
Power
Compartment Controls includes:
- Compressor motor contactors.
- Compressor staging relays.
-
Compressor crankcase heater relays.
- Control circuit terminals.
- Control circuit breaker (s).
- Field auxiliary control terminals.
Safety
& Operating Controls includes:
- System on-off switch.
- Oil pressure cut off - manual reset.
- Refrigerant high pressure cut off - manual reset.
- Refrigerant low pressure cut off
- Thermostat - chilled liquid cycling.
- Freeze Stat - low liquid temperature cut off
- Timer - compressor delay.
- High and low voltage protection.
- Phase failure protection.
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