Sterlco GC Series Central Chiller - Manual (Page 8)

GC Series Central Chillers Chapter 2: Functional Description 8 of 79
Process Fluid Temperature – The standard range for the leaving fluid temperature for this
series of chillers is 20°F to 80°F (-6.7°C to 26.7°C). When the process requires fluid
temperatures below 45°F (27.2°C) it is imperative that the process fluid be a mixture of an
industrial grade ethylene or propylene glycol and water to the proper percentage (by volume)
to protect the system. Some industrial grade glycols are not supplemented with a corrosion
inhibitor, therefore, it is highly recommended to add corrosion inhibitor that matches the type
of material types within the system. See Chapter 3 for a further discussion regarding the use
of glycol within the system for these applications.
WARNING! - ACS Group does not warrant the freeze up of the evaporator
under any circumstances.
Chilled Water Circuit
Cooling water “To Process” and “From Process” connections are made at
the butterfly valves at the rear of the chiller.
Warm coolant (water and glycol mixture) is pumped through the
evaporator where it is cooled.
The coolant is then returned to the pump tank or pumped out to the
process.
A thermal dispersion flow switch on the evaporator inlet is used to ensure
flow through the evaporator. If the flow switch is not made the controller
shuts down the compressor to prevent freezing inside the evaporator. 1
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