Heatcraft Refrigeration Products H-IM-79E User Manual
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 fixed
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.