McQuay WHR 017EW

4 Product Manual WHR-2
Features and Benefits
Efficiency
WHR-EW Water-Cooled and WHR-EA Air-Cooled, (depending on remote condenser selection) meet
ASHRAE 90-1 efficiency levels - the world’s standard for chiller efficiency.
The “E” vintage WHR-EA reciprocating chillers offer some of the highest operating efficiencies
available today through the use of highly efficient components and efficiency oriented packaging.
Operating economy at reduced load is increased by operating each refrigerant circuit partially
unloaded, rather than one circuit off and the other circuit fully loaded. At unloaded conditions each
compressor will operate at lower compression ratios with substantial power savings.
Optional steps of capacity reduction are accomplished by the most efficient method of cylinder
unloading in the industry today.
To McQuay, operating economy means more than just energy efficiency. The WHR chillers reduce
operating costs not only through energy efficiency, but by offering high unit reliability, easy
serviceability, full factory testing and the backing of a factory trained sales, service and parts
organization.
Flexibility
The WHR chillers come in 25 sizes between 17 and 210 nominal tons (60 and 710 kW). The small
capacity increments provide a selection that will closely match the required job capacity.
The WHR water chillers come completely factory assembled, piped, wired, and shipped in one piece;
ready for water piping and wiring connections. The EA remote condenser models are ready for field
piping to the remote condenser. Single main supply power terminal block can be supplied by one field
installed main supply power disconnect switch.
Many optional features can been added to fit your needs. A unit mounted non-fused disconnect
switch eliminates the need for a field installed disconnect. Phase failure/reversal protection, high
return water unloading, and acoustical sound enclosures around compressor are all optional features
that can be factory installed.
Reliability
The McQuay WHR chillers use the most advanced and efficient reciprocating compressors in the
industry, the Copeland DISCUS valve compressors. These heavy-duty, industrial quality, semi-
hermetic compressors are designed for R 22 or R-134a.
All WHR chillers are factory run tested to assure unit functionality. All safety and operating controls
are checked and calibrated. Chillers for remote condensers are connected to slave condensers for
testing purposes. This extensive testing assures trouble-free start-ups.
To protect the unit from abnormal operating conditions, a complete set of safety controls for each
circuit is used. Safety controls include compressor crankcase heater(s), freeze protection
pressurestats (manual reset), oil switches (manual rest), high pressure safety switches (manual reset),
and compressor motor overload protectors. Standard operating controls include time delay relays for
20-second sequence starting of compressors, manual pumpdown switches, low pressure controls,
compressor lead-lag switches (WHR-040EW-210EW) and chilled water temperature controller. All
controls and wiring are completely factory labeled for ease of service.