Norcold 442 Repair Manual page 14

B101
7. The adjacent chart specifies
the maximum pressure (high
fire) and minimum pressure
(low fire) for the burner opera-
tion. The Combination Control
modulates the pressure to the
burner between this
mum/maximum range based on
ambient temperature, refrigera-
tor load, and thermostat setting.
8. Access to the combination con-
trol is gained by removing (2)
knobs and (6) screws as shown
in Figure 3.18. The Combination
Control needs not be removed
for the pressure check.
9. Use a 3/16" allen wrench to
remove the plug and a 1/8"
NPT nipple to install in pres-
sure tap fitting.
Figure 3.29A Incorrect Manometer Reading
(warm refrigerator)
Gas Pressure Settings For Refrigerator
(Inlet Gas Pressure at 11"W.C.)
mini-
Model
442, 443
452, 453
462, 463
482, 483
See Step # 7 for proper operation of combination control
10. Figure 3.29A represents a possible defective combination control, a
clogged gas filter or a kinked supply line. Figure 3.29B indicates proper
gas pressure in a properly functioning refrigerator.
High Fire
10.5" To 10.9" W.C.
10.5" To 10.9" W.C.
10.5" To 10.9" W.C.
10.5" To 10.9" W.C.
Figure 3.29B Correct Manometer Reading
3-14
Low Fire
1.2" To 2.4" W.C.
1.2" To 2.4" W.C.
.8" To 1.8" W.C.
.8" To 1.8" W.C.