Sterlco GC Series Central Chiller - Manual (Page 18)

GC Series Central Chillers Chapter 3: Installation 18 of 79
Note: The use of poor quality water may result in inefficient operation, heat
exchanger damage, and pump seal damage. Consult a qualified water
treatment specialist to determine what type of treatment is needed.
3-6 Condenser Considerations
Water-Cooled Chiller Condensers
Water-cooled central chillers can use city water or tower water as a cooling medium through
the condenser. Make sure that all external piping and connections supplying and discharging
water to and from the condenser are full size.
You will make two connections to the water-cooled condenser:
Condenser Water In. The condenser water supply is labeled “Condenser Water In.” It is the
inlet for city or tower water.
Make sure that water is supplied at a maximum temperature of 85ºF (29ºC) and a minimum
pressure of 25 psi.
Caution! The electronic water-regulating valves pressure setpoint is set at the factory.
Only a qualified refrigeration technician should adjust the pressure setting.
Please contact our service group at 800-423-3183 to schedule an appointment.
Normal HFC-410a refrigerant condensing pressure is 342 psi (2,360 kPa), with 85ºF (27ºC)
water at 25 psi entering condenser water pressure
Condenser Water Out. Condenser water return is labeled “Condenser Water Out.” It is the
outlet for water after it has passed through the condenser.
It is connected to the tower water return line or to a sewer or other approved discharge
receiver. An electronic water-regulating valve is a standard feature in the condenser water out
line.
Figure 2: Typical GC Water Cooled Condenser Connections
Condenser Water Out
Condenser Water In