Clean The Openings Of The Burner Tube; Fig. 9 - Burner Tube Location; Fig. 10 - Openings Of The Burner Tube - Norcold Polar N7V Service Manual

PREVENTIVE MAINTENANCE, cont'd.

Clean the Openings of the Burner Tube

Clean the openings of the burner tube annually. To clean:
1. Close the valve at the vehicle propane gas tank(s).
2. Touch and hold the ON/OFF button (
to turn the refrigerator off.
3. Open the lower intake vent.
4. Disconnect the two (2) white wires from the gas train as-
sembly (Fig. 9, A).
To avoid possible propane gas leaks,
WARNING
!
always use two (2) wrenches to loosen
ATTENTION
and tighten the gas supply line at the gas
train assembly.
5. Disconnect the gas supply line from the gas train assembly.
6. Remove the two (2) screws (Fig. 9, B) that attach the gas
train support bracket/door assembly (Fig. 9, C) to the cool-
ing unit.
Never attempt to operate the gas train
WARNING
!
when it is NOT installed in the cooling unit
ATTENTION
because of the risk of electrical shock.
7. Remove the gas train assembly from the cooling unit.
When cleaning, do not try to remove
WARNING
!
the burner. Removal may can cause a
ATTENTION
propane gas leak. Leaking propane gas
can ignite or explode and result in danger-
ous personal injury or death. Do not try to
clean the burner with anything other than
compressed air.
8. Clean the openings of the burner tube with compressed air
only. Blow air into the openings of the burner tube.
9. Put the gas train assembly back onto the cooling unit.
10. Attach the gas train support bracket/door assembly to the
cooling unit.
11. Connect the gas supply line to the gas train assembly.
12. Connect the two (2) white wires to the gas valve of the gas
train assembly.
13. Open the valve at the vehicle propane gas tank(s).
14. Examine all of the gas connections for leaks. Refer to the
"Conduct Leak Test" procedure.
Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL
) for one (1) second

Fig. 9 - Burner tube location

A
B
C

Fig. 10 - Openings of the burner tube

14
B
C
Gas Train Assembly
Screws
Gas Train Support Bracket/Door Assembly
Air
Air Air
Air
A
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