Thetford N500 Series Owners Manual - Manual (Page 12)

Owner’s Manual 12
Refrigerator Maintenance
Gas flame appearance:
While in propane gas operation, examine the appearance of the
gas flame:
- On N400 and N500 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).
Refrigerator Storage
Before the refrigerator is stored for an extended (seasonal)
period of time:
- Defrost and clean the interior of the refrigerator.
- Close the doors with the storage latch.
If the refrigerator is stored for an extended period of time, before
start up:
- Make sure there are no obstructions in the vents, the
ventilation air pathway, the burner, the orifice, or the flue
area.
- Make sure the burner and the burner orifice are clean (See
Art00956).
- Clean if necessary.
- Make sure the electrode spark gap [3] is 1/8 - 3/16 inch
(See Art00955).
- Adjust if necessary.
- Make sure the AC voltage is 108 - 132 volts and the DC
voltage is 10.5 - 15.4 volts.
- Make sure the thermocouple tip is clean and secure.
- Make sure the area at the rear of the refrigerator is free of
any combustible materials, gasoline, and other flammable
vapors and liquids.
- 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.