ACS HE Series, Operation And Instruction Manual

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HE Series Central Chillers • 882.03862.00 • 12/02/2021
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The standard HE central chiller has an operating range of 50°F to 80°F (10°C to 27°C). Pure water
can be used when the desired tank temperature is 50°F (10°C) or greater. To operate below 50°F
(10°C) refer to the ethylene glycol and propylene glycol curves below. 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 tank temperature of 50ºF (10ºC) 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)
Figure 3: Ethylene Glycol and Propylene Glycol Curves
Pe rce nt G lyc ol Cu rves for Free ze P ro tec tion
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
10.0
20.0
30.0
40.0
0.0 10.0 20.0 30.0 40.0 50.0 60.0
% Gl ycol by Vol um e
Eth ylene G lycol
P rop ylene Glycol
Example: 45°F set point minus 20°F = 25°F.
From Figure 28, 25°F equates to 10% by volume of glycol required.