Propane System - Norcold 3163 Service Manual

Insulating the Flexible Exhaust Piping
The flexible exhaust pipe must be insulated prior to
installation into the vent terminal housing. The flexible
exhaust pipe connects to the flue tube of the refrigera-
tor's cooling unit and routes to the bottom opening of
the vent terminal housing. Use the non-combustible
insulation material supplied with the vent-air intake/ex-
haust kit. Do not insulate the Air Intake pipe.
Installing Refrigerator into the Enclosure
Set the refrigerator into the enclosure and slide it back
enough to connect the gas supply piping to the manual
shut-off valve located at the top of the refrigerator.
Connect the 12 volt DC supply to the terminal block also
located at the top of the refrigerator. Connect the AC
Testing of the Vehicle's Gas Supply Piping
When installation is complete, the propane gas
supply piping must be inspected and tested for leaks
from the refrigerator to the main gas supply tank. Use
a leak detection solution. Do not test for leaks with an
open flame.
If compressed air is used for leak testing, the pressure
must not exceed 1/2 psig (14 inches water column).
The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressure in
excess of 1/2 psig (14 inches water column).
The appliance must be isolated from the gas supply
piping system by closing its manual shutoff valve during
any pressure testing of the gas supply piping system at
test pressure less than or equal to 1/2 psig (14 inches
water column).
Check the gas pressure to the refrigerator without
other gas appliances operating. The pressure should
not exceed 11 inches water column. With other appli-
ances operating the pressure should not be less than
10.5 inches water column.
Gas Burner Flame
The gas operation of the refrigerator is controlled by
the correct burner flame which supplies the heat input
to the refrigerator's cooling system. The correct burner
flame is dependent upon correct input gas pressure
and the burner and burner orifice being clean. The
propane gas piping and the supply pressure must be
inspected and tested at least twice a year. All inspec-
tions and tests must be performed by the propane gas
supplier or a qualified service agency.
A visual check of the burner flame should be made
regularly. The burner flame can be observed through
the air inlet grille as shown in Figure 5.
power cord to the receptacle. Place the "O" rings onto
the ends of both flexible pipes. Bend the flexible pipes
so they clear the top of the enclosure. Connect the
piping as follows:
Exhaust Pipe - This pipe is insulated and connects to
Intake Pipe - This pipe is not insulated and connects to
Secure both flexible pipes to vent terminal housing
with locking washer and screw. Slide refrigerator com-
pletely into enclosure.

Propane System

Figure 5
As illustrated in Figure 6, the flame should be sharp
blue with a stable burning appearance. If there is a
constant yellow component observed or if the flame
appears erratic and unstable, perform the following
inspection. Check the gas supply pressure to insure the
pressure is between 10.5" W.C. min. - 11" W.C. max..
Inspect the Air Intake pipe between the burner and the
vent terminal housing for obstructions. If the gas supply
pressure is within specifications, and the Air Intake pipe
is clear of obstructions, clean the burner, orifice, and
cooling unit's flue tube. Also observe the position of the
flame; it must be centered under the flue tube without
touching the inner wall of the tube.
Figure 6
4
the flue tube of the cooling unit. Route
and connect to the bottom opening of
the vent terminal housing.
the burner cover. Route and connect to the
top opening of the vent terminal housing.
Burner Flame
Air Inlet Grille