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Page 16 SMC Series Chillers
; A corrosion inhibitor suitable for the materials in the system should be added to the
glycol/water solution.
; If straight water use is desired, contact the Sterling, Inc. Engineering Department.
; The six gallon (23 liter) reservoir is not designed to withstand water pressure above
5 psi (34 kPa).
; The fill opening and vent line must be vented to the atmosphere for proper
operation.
Figure 6: Ethylene Glycol Curve
E
t
h
y
l
ene
Gl
yco
l
R
equ
i
re
d
Normal Operating Range between 30°F - 70°F
for Evaporator Freeze Protection
Chilled Water
Operating Temperature °F
(Set Point)
10%
20%
30%
35°
25°
45°
55°
0%
65°
Ethylene
Percent
Glycol
by
Volume