Heatcraft H-IM-QRC, Installation And Operation Manual, Page: 7 / 40

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 adjustable low pressure switch
setting on freezer units. Refer to H-IM-CU
(Available on website). On some condensing
units, the low pressure switch has a fixed
setting and cannot be adjusted.
• Turn power on
• 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 page 10 for how to change
settings.
Start-Up Operation
Single System With Multiple Evaporators
• Check all wiring connections to be sure they are
correct and tight.
• On the condensing unit
- Check the low pressure switch setting on
freezer units. Refer to H-IM-CU (Available on
website). On some condensing units, the low
pressure switch has a fixed setting and cannot
be adjusted.
• Turn power on.
• On the MASTER evaporator
- DO NOT REMOVE the room sensor.
- 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 setting if necessary.
- See procedures on page 10 on how to change
settings.
• On the SLAVE evaporators.
- Each SLAVE Evaporator must be changed to
identify it as a SLAVE. Use the “ PROGRAM
REVIEW ” button to scroll until “ SLA ” appears,
then use the “SELECT” knob to select “YES”
then press “ENTER.”
- DO NOT NEED TO REMOVE the Room
Sensor on any evaporator.
M = Master Evaporator S = Slave Evaporator
M
S
S
S