Portable Chiller: MGD-15W-ADV-02
Page: 66
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
8.3
INHIBITED PROPYLENE GLYCOL
A.
To operate liquid chillers below 48°F, it is necessary to add
inhibited propylene glycol
to the circulating system to lower the freeze point and prevent damage to the cooling
system. Inhibited propylene glycol contains corrosion inhibitors which are compatible with
most industrial heat transfer surfaces. Inhibited propylene glycol is manufactured by:
• Dow Chemical - “DowFrost” (1-800-258-2436)
• Monsanto “Therminol FS” (1-800-459-2665)
• Advantage Engineering “Thermofluid” (1-317-887-0729)
B.
Automotive anti-freeze must never be used in industrial heat transfer applications.
Automotive anti-freeze contains silicate type corrosion inhibitors designed to be
compatible with automotive components. In an industrial application, the silicates will
form a gel on the heat transfer surface which will result in substantial reduction in cooling
capacity and is virtually impossible to remove.
8.4
CHILLER CAPACITY AND DERATE CHART
Standard chiller rating is at 50°F. For all other temperature settings, output tonnage is altered
as follows:
OUTPUT
TEMPERATURE
°F
FULL
AVAILABLE %
CAPACITY
60
105%
50
100%
45
90%
40
80%
35
70%
30
60%
25
50%
20
40%
NOTES:
If operation of the chiller at less than 48°F is required, an inhibited propylene glycol
solution is required.
Do not operate the chiller below 20F fluid setpoint unless the unit has been specifically
configured for this duty.
Ambient conditions affect air cooled chiller operation and capacity. Standard rating
is at 95°F entering air temperature. For ambient air conditions greater than 95°F, chiller
derating will occur. For ambient temperatures over 95°F consult factory.
