Heatcraft Refrigeration Products H-IM-79E Refrigerator User Manual


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8
CU M
M = Master Evaporator CU= Condensing unit
Start-UpOperation
SingleSystemWith1Evaporator
• Check all wiring connections to be sure
they are correct and tight.
• On the condensing unit
- Check the setting of time delay
relay. It should be set at 1 minute
(the second marker).
- Check the low pressure switch
setting on freezer units. It must be
set to 0 psig cut-out, 10 psig cut-in
to allow positive start and operation,
especially in cold ambients. This
can be changed to a higher value in
warmer climates. On cooler units, the
low pressure switch has a xed
setting and cannot be adjusted.
• Turn power on
Start-UpOperation
• On the evaporator
- Use the “PROGRAMREVIEW”
button to scroll through settings.
- Check “rEF” (Refrigerant Type).
Factory defaults are: Air Defrost
R-22, Electric Defrost R-404A.
Change to the refrigerant being used.
- Check “bot” (Box Temperature).
Factory defaults are: air defrost
35°F and electric defrost –10°F.
Change to the desired temperature.
- Review and change other setting if
necessary
- See procedures below on how to
change settings.
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