Removal & Replacement Procedure; Ac Heater Removal & Replacement; Dc Heater Removal & Replacement - Norcold 322 Repair Manual

AC Heater Removal & Replacement
WARNING
USE EXTREME CAUTION WHEN WORKING ON
THE AC ELECTRICAL COMPONENTS OF THE
REFRIGERATOR. BEFORE REPLACING ANY
ELECTRICAL COMPONENTS, DISCONNECT THE
AC POWER SOURCE TO THE REFRIGERATOR.
ELECTRICAL CURRENT CAN CAUSE SEVERE
ELECTRICAL SHOCK OR DEATH.
1. Disconnect the AC power cord from the AC re-
ceptacle.
2. Disconnect the two AC Heater leads from the
terminal block located on top of the control panel
(Terminals 1 & 2 in Figure 10).
3. Remove the screw which secures the Flue Ex-
tension tube and swing it out of the way.
4. Remove the insulation that surrounds the flue
tube. Use a utility knife and cut the insulation
vertically - starting above the heater.
5. Lift the AC Heater from the heater well.
6. Reinstall the new heater into the well until the
stop bead on the heater touches the heater well
(See Figure 18).
Figure 18
Removal & Replacement Procedures
Reinstall the insulation around the flue tube
making sure the insulation completely sur-
rounds the flue tube.
8. Tape the insulation closed.
9. Insure that the insulation does not obstruct the
opening in the flue tube.
10. Reconnect the AC Heater leads to the AC
Heater terminals (Terminals 3 & 4 in Figure 10).
11. Reconnect the AC power cord to the AC re-
ceptacle.
DC Heater Removal & Replacement
1. Disconnect the DC input leads from the refrig-
erator, tape the positive terminal to prevent
shorting to any metal surface and blowing the
input fuse.
2. Insure that the Mode Selector is set for DC op-
eration, this eliminates other energy sources
from being activated.
3. Disconnect the DC Heater leads from the heater
terminals located on top of the control panel
(Terminals 3 & 4 in Figure 10).
4. Remove the screw which secures the Flue Ex-
tension tube and swing it out of the way.
5. Remove the insulation that surrounds the flue
tube. Use a utility knife and cut the insulation
vertically - starting above the heater.
6. Remove the DC Heater from the heater well.
7. Install the replacement the heater well, gliding
it in until the bead stop on the heater touches
the well.
8. Reinstall the insulation around the flue tube
making sure the insulation completely surrounds
the flue tube.
9. Tape the insulation closed.
10. Reconnect the heater leads to the DC Heater
terminals (Terminals 3 & 4 in Figure 10).
11. Insure that the 20 AMP fuse is installed in the in
line fuse holder.
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