DRAFT
NOT FOR PUBLIC RELEASE
26
www.norcold.com/cda
N500/N510 Models
Refrigerator Service Manual
Figure 24. LP gas flame appearance.
Light blue outer mantle
Flame not touching
flue wall
Dark blue inner cones
3/16 in. electrode-
to-burner gap
Handling of LP Gas Lines and Fittings
Loosen and tighten all connections using two wrenches.
Insufficient or excessive force when tightening fittings
can result in loose joints or deformed joint parts. Either
condition can result in LP gas leakage.
Figure 25. Flue and components
Canister
Flue cap
Flue tube
(flue baffle no
shown)
Canister door
Components Continued - All Models
Burner
A five slot burner is the combustion chamber for the LP
gas. Poor or no cooling while operating on LP gas can
usually be traced to a dirty, clogged, or damaged burner.
In most instances, a weak or erratic flame indicates the
burner and orifice need service. The burner flame
appearance should always conform to the pattern
shown in Figure 24. To check burner performance:
1. Set the thermostat knob to 5.
2. Start and operate the refrigerator on LP gas.
!
WARNING:
When working on or near the LP gas system:
T Do not smoke or light fires! Extinguish all open
flames!
T Do not use an open flame to leak test any of the
LP gas system components. LP gas is highly
flammable and explosive.
T Do not connect the refrigerator directly to the LP
gas tank. Always use an approved pressure
regulator between the LP gas tank and the
refrigerator LP gas system.
T Always use two wrenches to tighten or loosen
connections to prevent damage to connections,
piping, and components. Damaged connections,
piping, and components create the potential for gas
leaks.
LP GAS SYSTEM - ALL MODELS
!
CAUTION:
The burner box cover and inspection port cover may
be hot. To prevent burns, wear gloves and exercise
extreme care when working on the burner cover or
opening and closing the burner box inspection port
cover.
3. Open the burner box inspection port. Refer to Figure
24 for flame appearance guidelines.
Flue Tube
The flue tube channels hot exhaust gases towards the
exhaust vent. It should be cleaned annually to maintain
the combustion system at peak performance.
Flue Cap
The flue cap maintains a slight back pressure of hot
combustion exhaust gases in the flue tube. This slight
back pressure helps to establish and maintain a good
draft of ventilation air through the cooling unit.
Flue Baffle
The flue baffle is located inside the flue tube and helps
distribute the heat to the generator section of the
cooling unit. The flue baffle must never be permanently
removed. The flue baffle should be cleaned annually to
maintain the combustion system at peak performance.
To remove the flue baffle for cleaning:
1. Remove the flue cap (see Figure 25).
2. Unclip the baffle retaining wire from the rim of the flue
tube.
3. Pull the baffle out of the flue tube.
!
CAUTION:
Flue and components may be hot. Allow flue to cool
before servicing.
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