Heatcraft Refrigeration Products 25001401, Installation And Operation Manual

Page: 7 / 36

7
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 adjustable low pressure switch
setting on freezer units. Refer to H-IM-CU. On
some condensing units, the low pressure switch
has a fixed setting and cannot be adjusted.
• Turn power on
Start-Up Operation
CU M
M = Master Evaporator CU = Condensing unit
• On the evaporator
- Use the “ PROGRAM REVIEW ” button to scroll
through settings.
- Check “ rEF ” (Refrigerant Type). Factory defaults
are: Air Defrost R-404A, 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 settings if necessary
- See procedures on pages 11-12 for how to
change settings.