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Refrigerator maintenance, Gas flame apppearance, Remove and clean the burner orifice – Thetford N400 Series Owners Manual User Manual

Page 12: Remove the refrigerator

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Owner’s Manual 12

Remove the Refrigerator

NOTE: Your dealer or an authorized Norcold Service Center

must do this procedure.

CAUTION:

The rear of the refrigerator has sharp edges

and corners. To prevent cuts or abrasions when working
on the refrigerator, be careful and wear cut resistant
gloves.

1. Close the valve at the propane gas tank(s).

WARNING:

To avoid possible propane gas leaks,

always use two wrenches to loosen and tighten the gas
supply line at the refrigerator’s manual shut off valve.

2. Open the lower intake vent and remove the gas supply line

from the manual shut off valve of the refrigerator.

3. Remove the AC power cord from the receptacle.

Refrigerator Maintenance

Gas flame appearance:

While in propane gas operation, examine the appearance of the
gas flame:

- On N400 models, turn the thermostat to the 5 position.

- On N510 models, push and hold temperature setting button

until the “9” shows and then release.

- Open the lower intake vent.

CAUTION:

The burner box cover can be hot. Wear

gloves to avoid burns.

- Open the burner box door [3] and look at the gas flame [1]

(See Art00955 and Art00975).

- The flame should be:

- a darker blue color on the inside of the flame and

a lighter blue color on the outside of the flame.

- a constant shape without flickering.

- Contact your dealer or Norcold authorized service

center if the flame is:

- yellow

- flickering or changing shape.

- Make sure the flame does not touch the inside of the

flue tube [2].

- If the flame touches the inside of the flue tube, contact

your dealer or an authorized Norcold Service Center.

- Close the burner box door.

Remove and clean the burner orifice:

NOTE: Your dealer or an authorized Norcold Service Center

must do this procedure.

To remove and clean the burner orifice:

- Close the valve at the propane gas tank(s).

- Close the manual shut off valve of the refrigerator.

- Shut down the refrigerator..

- Open the lower intake vent.

CAUTION:

The burner box cover can be hot. Wear

gloves to avoid burns.

- Remove the burner box cover by removing one screw.

WARNING:

To avoid possible propane gas leaks,

always use two wrenches to loosen and tighten the
gas supply line at the refrigerator’s manual shut off
valve.

- Remove the flare nut from the orifice assembly [1] (See

Art00956).

- Remove the orifice assembly from the burner [2].

WARNING:

Do not try to remove the orifice [3] from the

orifice adapter [4] when cleaning. Removal will
damage the orifice and seal of the orifice and can
cause a propane gas leak. Leaking propane gas can
ignite or explode which can result in dangerous
personal injury or death. Do not clean the orifice with a
pin or other objects.

- Clean the orifice assembly with air pressure and alcohol

only.

- Using a wrench, assemble the orifice assembly to the

burner.

- Assemble the flare nut to the orifice assembly.

- Tighten the flare nut by hand.

- Hold the orifice assembly securely and, using a

wrench, tighten the flare nut 1/4 revolution only.

- Examine all of the connections for gas leaks.