Sterlco GC Series Central Chiller - Manual (Page 26)

GC Series Central Chillers Chapter 3: Installation 26 of 79
3-8 Fluid Temperature Considerations
Warning! Operating the chiller setpoint below 45°F (7°C) without the proper
amount of glycol for freeze protection could result in a damaged
evaporator. ACS Group does not warrant the freeze up of the
evaporator under any circumstances.
The standard GC central chiller has an operating range of 20°F to 80°F (-7°C to 27°C). Pure
water can be used when the desired fluid temperature is 45°F (7.2°C) or greater. To operate
below 45°F (7.2°C) refer to the ethylene glycol and propylene glycol curves in Figure 9:
Ethylene Glycol and Propylene Glycol Curves on page 27. Add a pre-mixed solution of
industrial quality (not automotive), inhibited ethylene glycol or propylene glycol and water to
provide freeze protection to a temperature 20ºF (11ºC) below the normal chiller operating
temperature set point.
Glycol and/or water, with an inhibitor, should be used to protect the materials (copper, steel,
stainless steel, and bronze) in the system from corrosion. If you intend to use straight water,
we strongly advise a minimum leaving water temperature of 45ºF (7ºC) or contact the service
department.
The following glycol products are available:
Part Number Description
216.00014.00 Ethylene glycol, 5 gallons (18.9 liters)
216.00014.01 Ethylene glycol, 55 gallons (208.2 liters)
216.00013.00 Propylene glycol, 5 gallons (18.9 liters)
216.00013.01 Propylene glycol, 55 gallons (208.2 liters)