Technical information

OPERATION 4-25
To set the percent ethylene glycol or propylene glycol solution
determine the temperature of the process fluid you want.
Use water as the coolant for chilling the process fluid down to
40°F (4°C). Below 40°F and down to 20°F (-7°C), use a gly-
col solution.
Use the table to choose the proper percentage of glycol solu-
tion for the required temperature.
PLC C
ONTROL
SETTING
PERCENT
GLYCOL
NOTE: If you are using
water as the coolant, set
the Percent Glycol to
zero on the control.
STATUS SETUP RUN ALM
press arrow
This screen is password
protected. You must
have clearance to enter
and change this setting.
After choosing the temperature you want, mix the glycol solu-
tion to the proper percentage and fill the chiller according to
the directions in Filling with Glycol Coolant, in the
Installation section.
Program the percentage glycol solution into the control. From
the main screen:
Press the Setup arrow.
1
UGH024/1103 Portable Chillers
Recommended Percentages of Glycol for
Chilled Water Freeze Protection
Discharge water % Propylene % Ethylene
Temperature Glycol Glycol
Above 45°F 0 0
40°F 20 15
35°F 25 20
30°F 35 30
25°F 40 35
20°F 45 40
Below 20°F Consult Factory
Continued