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2-40 HP Portable Chillers Chapter 2: Functional Description 10 of 70
2-3 Standard Features
Mechanical Features
Compressor. Hermetic scroll compressors are used on 2 hp through 30 hp (1.49 through
23.37 kW) models. Semi-hermetic discus compressors are used on the 35 hp and 40 hp (26.20
and 29.83 kW) models.
Evaporator. Stainless steel copper brazed plate evaporators are used on 2 hp through 30 hp
models. Shell and tube evaporators are used on the 35 hp and 40 hp models.
Air-Cooled Condenser. Aluminum fin/copper tube with washable filters, package unit only.
Water-Cooled Condenser. 2 hp to 7.5 hp models use tube-in-tube condensers. 10 hp to 40
hp use cleanable shell and tube condensers. All come with cooling water regulating valves
for cooling tower water or city water.
Remote Air-Cooled Condenser. 5 hp to 40 hp only. Aluminum fin/copper tube with low
ambient control down to –20ºF (-29ºC) via pressure-actuated fan staging and a variable-speed
primary fan.
Reservoir. 2 hp and 3 1/2 hp models use a 6 gallon polyethylene tank. 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. 20 hp to 30 hp models use an 80 gallon polyethylene tank, and 40 hp
models use a 65 gallon stainless steel tank.
Piping. Non-ferrous piping for 2 hp through 30 hp models. 40 hp models have non-ferrous
piping.
Pump. ODP motors—horizontally mounted stamped stainless steel or cast bronze
construction.
Other Mechanical Features
• External fill/drain sight glass
• Low process water pressure switch on 2 hp and 3 1/2 hp models
• Low process water flow switch on 5 hp to 40 hp models
• Galvanized steel mounting rails for remote air-cooled models
• NEMA-rated fan motor(s) on air-cooled models
• Galvanized structural steel frame, painted cabinetry, with 2 1/2” swivel casters on 2 hp
and 3 1/2 hp models. 4” swivel casters on 5 hp to 15 hp models, and 5” swivel casters
with brake on 20 hp to 40 hp models.
• Valved process water connections
• Pressure-actuated process water bypass valve for system protection only; on single
pump models only
• To process 2 1/2” dual scale liquid-filled water pressure gauge
• Fully insulated refrigeration and process water piping
• Isolated fan section on air-cooled models, allowing chiller to run during maintenance
• 20 mesh Y strainer on process water piping into the evaporator