4A.0 8- AND 10-TON PROCESS CHILLER USER MANUAL SUPPLEMENT
4A.1 Product Description
The 8- and 10-ton process chiller is a self-contained air cooled system, containing two (2) scroll
compressors and two (2) heat exchangers. An optional 2 HP multistage stainless steel pump may
be included (see model number) to overcome the high pressure drop found in some MRI and CT
systems.
4A.1.1 Additional Equipment
The chiller includes a panel of gauges attached to the end of the cabinet. Eight (8) gauges are
included:
• Suction Pressure Refrigerant Circuit #1
• Suction Pressure Refrigerant Circuit #2
• Discharge Pressure Refrigerant Circuit #1
• Discharge Pressure Refrigerant Circuit #2
• Water Inlet Pressure
• Water Outlet Pressure
• Water Inlet Temperature
• Water Outlet Temperature
Refrigerant Charge: 29.4 # per circuit R-22
Internal Glycol Volume (without 100 gallon storage tank):
12.4 gallons (8-ton, model PS096A)
12.6 gallons (10-ton, model PS120A)
Multistage Circulating Pump
The model number indication for the multistage pump is an “M” or “R” in the ninth character of
the model number. For example PS096A-AM40.
1. Fully unscrew the pin located in the drain plug.
2. Close the discharge valve.
3. Remove the vent plug and fully unscrew the drain plug pin.
4. Open the suction valve until liquid flows out of the vent plug connection.
5. Install and torque the vent plugs to 15 lbs-ft. Close the drain plug pin and open the discharge
valve.
For additional information, refer to the pump user manual that is shipped with the chiller and
attached to the pump with a cable tie. Figure 3A shows the flow and pressure characteristics.
NOTE
The chiller includes a factory-installed and wired multistage circulating pump. It is
important that the pump be properly primed before operating.
Maintenance 18A