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GP Series Portable Chillers Chapter 2: Functional Description 8 of 44
The refrigerant is compressed in the compressor and flows through the discharge line as a gas
to the condenser. There it gives up its heat as it condenses to a liquid in the condenser.
An electronic hot gas bypass valve is used to control cooling capacity during intermittent or
partial load conditions. This feature contributes substantially to chiller longevity by
eliminating excessive cycling of the compressor and providing close temperature control.
2-3 Standard Features
Mechanical Features
Compressor. Hermetic scroll compressors.
Evaporator. Stainless steel copper brazed plate evaporators.
Air-Cooled Condenser. Aluminum fin/ tube with washable filters, package unit only (option
on remotes).
Water-Cooled Condenser. Tube-in-tube condensers. All come with electronic cooling
water regulating valves for cooling tower water or city water.
Remote Air-Cooled Condenser. Aluminum fin/tube with low ambient control down to –
20ºF (-29ºC) via a variable-speed primary fan.
Reservoir. 5 hp and 7.5 hp models use a 20 gallon polyethylene tank. 10 hp and 15 hp
models use a 40 gallon polyethylene tank.
Piping. Non-ferrous piping
Pump. TEFC motors (Optional 10 HP is ODP only)—horizontally mounted stamped
stainless steel construction.
Other Mechanical Features
• Low process water thermal flow switch
• NEMA-rated fan motor(s) on air-cooled models
• Galvanized structural steel frame, painted cabinetry, with 4” (locking) swivel casters
• Internal process water bypass valve for system protection only
• Fully insulated refrigeration and process water piping
• 20 mesh Y strainer on process water piping into the evaporator
• Tank level indication
• Pump pressure indication
Electrical Features
• Fully accessible NEMA 12-style electrical control enclosure
• Single-point power and ground connection
• Non-fused disconnect switch, lockable
• Branch circuit fusing
• 208-230/3/60, 460/3/60, 575/3/60 volt; 400/3/50 volt