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RANGE / COMPRESSORS
Compressors.
Reciprocating, scroll and screw compressors — hermetic and open type. Capacity and mounting confirmed against your application.
Copeland compressors.
Scroll compressor families for air conditioning, cold rooms and refrigeration, a finder that shortlists by application and refrigerant, and a quote form.
What we stock.
7 items in this line, confirmed on the call for stock and trade price.
Copeland
Copeland compressors
Scroll families for air conditioning and refrigeration, a finder and a quote form. Series ranges only where Copeland documents them.
Reciprocating compressor — hermetic
Sealed shell unit. Capacity and mounting on request.
Reciprocating compressor — open type
Belt or direct driven, external motor. Capacity on request.
Scroll compressor — fixed speed
Single speed scroll unit. Capacity and mounting on request.
Scroll compressor — inverter
Variable speed scroll unit. Capacity and mounting on request.
Screw compressor — twin screw
Twin rotor unit for larger plant. Capacity on request.
Screw compressor — single screw
Single rotor unit for larger plant. Capacity on request.
Compressors: types, matching and warranty.
Can you match a compressor to my existing unit?
Yes. Give us the nameplate details or the old unit’s model, and Refrigeration Centre will confirm the right match or the nearest equivalent.
Do compressors carry a warranty?
Compressors carry the manufacturer’s warranty where one applies, and Refrigeration Centre will help you make a claim under it. See section 11 of the terms of sale.
What is the difference between hermetic and open compressors?
A hermetic compressor has its motor and pump sealed in a welded shell; it cannot be opened and is replaced as a unit, as in domestic refrigerators and most split ACs. An open compressor is driven by a separate motor through a shaft seal, by belt or direct coupling.
Reciprocating, scroll or screw: which is used where?
Reciprocating compressors use pistons and suit small and medium refrigeration and many older AC systems. Scroll compressors use two interleaved spirals, run quietly with few moving parts, and are common in split and ducted ACs, heat pumps and medium commercial systems. Screw compressors use rotors and are used on large chillers and industrial refrigeration. Refrigeration Centre stocks all three types.
What should I check before ordering a replacement compressor?
Check the model number on the nameplate, the refrigerant, the power supply (voltage, phase and frequency), the capacity, the application temperature range (high, medium or low back pressure), the oil type, and the mounting and connection sizes. An exact model is not always needed: with these details Refrigeration Centre can confirm a match or the nearest equivalent.
What is an inverter compressor?
An inverter compressor runs at variable speed: an inverter drive changes the motor speed to match the load, instead of switching the compressor on and off. It cannot run directly on mains power, so a replacement has to suit the unit’s drive and controller. Refrigeration Centre stocks inverter scroll compressors alongside fixed-speed ones.
Why do compressors fail?
The common causes are liquid refrigerant returning to the compressor, overheating from high discharge temperatures (a low charge or a blocked condenser), electrical faults such as low voltage or a failed capacitor or contactor, loss of oil, and contamination by moisture, acid or brazing scale. Find and fix the cause before fitting a new compressor, or it will fail the same way.
What should be done after a compressor burnout?
A motor burnout leaves acid and carbon in the system. Recover the refrigerant, check the oil for acid, clean the system as the compressor maker advises, and fit new filter driers, usually with a suction-line filter drier for the clean-up. Then pressure test and evacuate thoroughly before charging. Fitting a new compressor into a contaminated system is a common cause of repeat failures.
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