Chiller Service Manual
Publication Number: 620920816SER
- 4 -
© 2005, IMI Cornelius Inc.
E
LECTRONIC
T
EMPERATURE
C
ONTROL
WITH
D
ISPLAY
NOTE: When the unit leaves the factory the electronic thermostat is pre-set to the following
parameters:
Temperature Scale:
F (Farenheit)
Setpoint:
30
o
F
Differential:
3
o
F
Operating Mode:
C1 (Cooling)
NOTE: To ensure the correct operation of your unit these parameters must be adhered to.
NOTE: The Keypad Lockout switch must be in the “UNLOCK” position (factory setting) before
adjusting the control. If the keypad is locked, pressing buttons has no effect on the control. The
Keypad Lockout switch is located on the back inside of the front cover. If necessary, remove the
cover by loosening the four captive cover screws.
Changing Temperature Units
1.
Press
Set
button once to display temperature unit.
2.
Press the
Up
or
Down
button to toggle between
°F
and
°C
.
3.
Continue pressing and releasing
Set
button until tank temperature is displayed in normal operating
mode (“S1” not flashing).
Setting the Setpoint
Before setting the setpoint, be sure the control is set to the temperature units you want to use, Celsius or
Fahrenheit.
To view and adjust the setpoint, use the following method:
1.
Press the
Set
button twice to display Setpoint (
“S1”
flashing).
2.
Press the
Up
or
Down
button to adjust Setpoint.
3.
Continue pressing and releasing
Set
button until tank temperature is displayed in normal operating
mode (
“S1”
not flashing).
NOTE: If no entries are made for thirty (30) seconds, the control reverts back to the tank
temperature display.
MAINTENANCE
1.
Inspect the unit monthly to ensure that the glycol level is maintained to the fill level.
2.
If the level is low replace with a propylene glycol solution, (
mixed 2 ½ parts water to 1 part
glycol
).
3.
If there is evidence of ice build up in the unit, allow the ice to melt and replace all the water/glycol
solution with a fresh solution.
4.
The glycol/water solution should be changed every 2 years. In regions of high humidity
considerations should be given to replacing the solution on an annual basis.
5.
Check and clean the condenser fins every 6 months.
6.
Check that there is adequate air flow through the unit ensuring enough space all around and that
there are no obstructions in front of the air flow vents.
7.
Check the condition and effectiveness of the trunk line insulation.
8.
At regular intervals, to be determined by the owner, the unit should be checked for electrical safety.
Summary of Contents for ENDURO 250
Page 4: ......
