Flame Spreader Position - Norcold 322 Repair Manual

Check to insure the main gas pressure is set at
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11" W.C. with only the refrigerator running. Then
check with all other gas appliances operating.
This check assures the main tank regulator is
properly functioning. Make sure the customer is
using propane, not a mixture of Butane, etc.
Check the flame appearance. Refer to Figure
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11. The flame should emerge from all four
burner slots with a steady blue color without yel-
low or smoky tips.
Figure 11
The flame envelope should be centered into the
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fire tube (See Figure 11). If the envelope hits on
the side of the fire tube, a noticeable decrease
in cooling could be observed. This condition
would be caused by physical damage to the
burner or fire tube.
If extremely poor cooling is observed on Gas
*
mode only and all of the above observations
seem normal, make sure the flame spreader is
properly placed in the fire tube. See Figure 12
for proper position.
If the visual observations listed above do not identify
a cooling problem in the Gas mode, perform the fol-
lowing checks:
1. Insure that the Selector switch is set for gas
operation and that the gas is turned on at the
tank, and that the manual shut-off valve is in
the ON position.
2. Connect a manometer to the pressure tap tee as
indicated by Figure 2.
3. Depress and rotate the gas control knob coun-
terclockwise to the max. cool position. You
should show 10.5" to 11" W.C. NOTE: Keep the
control knob depressed.
4. Rotate the knob to the min. cool position the ma-
nometer should show 8.5" W.C. ± 0.5" W.C.
Figure 12 - Flame Spreader Position
5. If the pressures are not as indicated in Step 3
and 4, check the following:
• Recheck the main gas pressure to the refrig-
erator is set at 10.5" to 11" W.C.
• Inspect the filter located in the inlet side of
the manual Gas Valve (Figure 13) to confirm
that it has not become dirty/plugged from
contaminates. If in doubt, replace the filter.
• Inspect the burner orifice to confirm it is the
correct size (LP10) and that it is clean.
Figure 13
12