Product Manual WHR-2 5
Serviceability
Semi-hermetic, 1750 rpm induction type motors are employed. The motors are refrigerant gas cooled.
A finned motor housing helps dissipate motor heat. Solid-state modules in the motor terminal box
respond to temperature sensors imbedded in all three motor windings to provide inherent thermal
overload protection for all run and start conditions.
Serviceable compressors offer reduced
maintenance costs because if problems
develop with components such as oil
pumps, unloaders, and pistons, they
can be serviced in the field without
replacing the compressor. Both suction
and discharge service valves are
provided to allow isolation of the
compressor from the refrigerant circuit.
All multiple compressor units utilize
two independent refrigerant circuits.
Dual refrigerant circuits permit
shutdown and routine maintenance and
service of one circuit while the second
circuit maintains system operation
where two or more compressors are
supplied.
Refrigerants
Models WHR 017 through WHR 210 utilize R-22 as the standard refrigerant. Models WHR 040
through WHR 210 can be furnished with R-134a refrigerant.
Full factory testing
Extensive quality control checks and individual performance tests assure that the units will meet the
requirements of the application and start-up and perform reliably. EA remote condenser models are
shipped with a holding charge of refrigerant, EW water-cooled units are shipped with a complete
operating charge.
Each unit is pressure tested, evacuated and charged with refrigerant for test purposes. Extensive
quality control checks and individual unit performance tests, at full load, ensure that each control is
properly adjusted and operates correctly. EA remote condenser models are connected to factory slave
condensers for testing. Each unit is then rechecked for refrigerant leakage.
Code Approvals
All WHRhb units are constructed and/or rated with the latest ANSI/ASHRAE 15 Safety Code,
National Electrical Code and ASME Boiler and Pressure Vessel Code. All models are ETL approved or
cETL listed.
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