Thetford 6100 Series - Manual (Page 19)

Refrigerator Maintenance
1. Leak test gas supply piping and fittings at least
once a year. This procedure should only be
performed by your dealer or a Norcold service
center. These facilities are familiar with gas re-
frigerators and propane gas systems.
2. Check the main line gas pressure periodically
and adjust if necessary. The correct input gas
pressure is 11 inches water column. It is rec-
ommended that your dealer or a Norcold serv-
ice center perform this task.
3. Clean the refrigerator’s burner and burner ori-
fice. This procedure is required once a year
minimum and should only be performed by
your dealer or a Norcold service center. These
facilities are familiar with gas refrigerators and
propane gas systems.
4. Insure that the LP gas supply is Propane, not
another fuel such as Butane or Butane mix-
tures.
5. Periodically inspect the burner flame appear-
ance during gas operation. See "Burner Flame
Inspection on page .
6. Inspect the electrode assembly to insure it is
secure to the burner bracket.
7. Inspect the flue of the refrigerator’s cooling sys-
tem. This area must be free of foreign materi-
als. Foreign materials observed in the flue indi-
cate the burner requires cleaning.
8. Insure the area directly behind the refrigerator
is not being used for storage. Keep the refrig-
erator area clear and free from combustible
materials, gasoline, and other flammable vapor
and liquids.
9. Periodically inspect the ventilation system.The
air passage from the bottom intake vent to the
refrigerator coils and from the refrigerator coils
through the upper exhaust vent must be unob-
structed.
10. Inspect combustion seals (visual check without
removing the refrigerator). Combustion seals
are attached to the back surfaces of the refrig-
erator’s mounting flanges to assure a complete
seal.
11. Periodically inspect door seals. See "Checking
Door Seals" below.
Checking Door Seals
To insure cooling efficiency and to prevent frost for-
mation, the door gasket must seal completely.
To check for proper door seal, lay a strip of paper
between the gasket and the refrigerator. Close the
door and withdraw the paper. A frictional drag should
be noticed. Repeat all around the door. If the paper
does not have a noticeable drag, the gasket is not
sealing. Contact your dealer or a Norcold service
center for corrective procedures.
Refrigerator Storage
When the refrigerator will not be in use for an ex-
tended (seasonal) period of time, it is recommended
that all power to the refrigerator be disconnected. Un-
plug the refrigerator’s AC power cord from the wall
receptacle and disconnect the 12 volt DC from the
refrigerator’s terminal block located at the rear of the
refrigerator. Clean the refrigerator interior and leave
the door(s) open to keep the interior odor free. After
the extended shut-down period, the burner, burner
orifice, and flue must be inspected before igniting the
burner flame. These areas must be free from dust,
spider webs, or other obstructions which might re-
strict the combustion system.
Burner Flame Inspection
The efficiency of your refrigerator while operating in
the gas mode is independent upon the correct burner
flame. The burner flame provides energy to the re-
frigerator’s cooling system.
The burner flame efficiency is a function of correct
input gas supply pressure, air input, and burner and
burner orifice cleanliness.
A visual check of the burner flame should be made
regularly. The flame should be sharp blue with a sta-
ble burning appearance (Figure 22). If there is a con-
stant yellow component observed or if the flame ap-
pears erratic or unstable, switch the refrigerator to
electric or turn the refrigerator "OFF" and contact
your dealer or a Norcold service center.
Refrigerator Removal and Replacement 1.
1. Turn off the gas at the main supply tank(s).
2. Turn the refrigerator off.
3. Turn the refrigerators manual shut-off to off.
Figure 22
1 9