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Temperature
50F
Setpoint
50F
Stat Setup
Run Alarm
To Process Temp
50 F
From Process Temp
56 F
Unloading 90 %
%E.G. by Vol.
Min. Setpoint 40 F
COMP 1= ON IN SERV
COMP 2= OFF IN SERV
Suction Pressure 1
70 PSIG
Discharge Pressure 2
250 PSIG
% E. G. BY VOL 0
LOW TEMP CUTOUT 40 F
4 - 2 0
l O p e r a t i o n
P L C C o n t r o l Vi e w i n g R u n M e n u
C o n t i n u e d
Status screens include:
Temperature
Displays the To Process temperature and the Setpoint temperature. To change the
Setpoint temperature, go to Changing Setpoint Temperature, in the Operation section.
From Process Temp
Shows the temperature of the fluid entering the chiller. Can display in degrees
Fahrenheit or Celsius.
Percent chiller load
Shows the current percent of chiller capacity being used. This percentage is a read-
0 %
only value and changes as the chiller cycles.
Compressors (for units with dual compressors, 20 ton+)
Displays the activation status of the two refrigeration circuits, compressor 1 and
compressor 2. ON is activated; OFF is disabled. Lists In/Out of Service for each.
Refrigerant suction pressure
Shows the status of the refrigerant suction pressure in PSIG for compressor(s) 1
and 2, if chiller has dual compressors. NOTE: Typical refrigerant suction pressure
is between 55 PSIG and 95 PSIG.
Refrigerant Discharge pressure
View the status of the refrigerant discharge pressure in PSIG for compressor(s) 1
and 2, if chiller has dual compressors. Typical discharge pressure is between 190
PSIG and 325 PSIG.
Percent Ethylene Glycol by Volume and Low Temperature Cutout
Displays the percentage of ethylene glycol or propylene glycol solution (by vol-
ume) in the chiller in degrees Fahrenheit. Changing the percent glycol automati-
cally changes the low temperature cutout.
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