Norcold 3163 - Gas Burner Flame Characteristics; Burner Orifice Removal and Cleaning; Removing and Replacing Refrigerator

Gas Burner Flame
The
g
as operation of
y
our refri
g
erator is controlled b
y
the correct burner flame which supplies the heat input
to the refri
g
erator’s coolin
g
s
y
stem. The correct burner
flame is dependent upon correct input
g
as pressure
and the burner and burner orifice bein
g
clean. The
propane
g
as pipin
g
and the suppl
y
pressure must be
inspected and tested at least twice a
y
ear. All inspec-
tions and tests must be performed b
y
the propane
g
as
supplier or a
q
ualified service a
g
enc
y
.
A visual check of the burner flame should be made
re
g
ularl
y
. The burner flame can be observed throu
g
h
the observation port on the left side of the burner box.
The flame should be sharp blue as illustrated in Fi
g
ure
7 with a stable burnin
g
appearance. When there is a
constant
y
ellow component observed or if the flame
appears erratic and unstable, contact
y
our dealer,
g
as
supplier, or a Norcold authorized service center. Also
observe the position of the flame; it must be centered
under the flue tube without touchin
g
the inner wall of
the tube. Norcold stron
g
l
y
recommends that an
y
re-
q
uired ad
j
ustments be performed b
y
y
our dealer or a
Norcold authorized service center.
Burner Orifice Removal and Cleaning
Procedure
1. Turn off the
g
as suppl
y
at the main tank.
2. Turn refri
g
erator off.
3. Turn off refri
g
erator’s manual shut-off valve.
4. Remove refri
g
erator from the enclosure.
5. Remove the screw located on the ri
g
ht front of
the burner box.
6. Remove the two screws securin
g
the heat shield
to the refri
g
erator’s support brackets.
7. Remove the burner box from the coolin
g
unit.
8. Remove the flare nut from the orifice assembl
y
.
9. Remove the orifice assembl
y
from the burner.
Do not attempt to remove the orifice from the orifice
adapter fitting when cleaning. Removing the orifice will
cause serious damage to the orifice and it’s press-fit
seal and may create propane gas leakage. Leaking
propane gas, if ignited, could cause an explosion re-
sulting in severe personal injury or death.
10. Clean the orifice assembl
y
with alcohol and air
pressure.
Do not clean the orifice with a pin or
similar object.
11. Clean the burner with alcohol and air pressure.
Make sure the slots of the burner are unobstructed.
12. Re-install the orifice assembl
y
. Insure orifice is
wrench ti
g
ht in burner.
13. Reconnect flare nut to orifice assembl
y
.
14. Re-install the burner box. Insure the burner box
g
asket seal is in
g
ood condition before reinstall-
in
g
. If dama
g
ed, contact
y
our dealer or a Norcold
Service Center.
15. Leak test refri
g
erator fittin
g
s.
16. Re-install the refri
g
erator and leak test main sup-
pl
y
pipin
g
at the manual shut-off valve.
Removing and Replacing the Refrigerator
To remove the refri
g
erator, interrupt both the AC
and DC power sources to the refri
g
erator. Turn off
the propane
g
as at the main suppl
y
tank. Remove the
screws at the front securin
g
the refri
g
erator to the
enclosure. Slide the refri
g
erator forward enou
g
h to
disconnect
g
as suppl
y
pipin
g
at the manual shutoff
valve located at the top of the refri
g
erator. Discon-
nect the 12 volts DC at the terminal block. Disconnect
the AC power cord from the receptacle. Remove the
intake and exhaust pipin
g
from the vent terminal hous-
in
g
. The refri
g
erator is now read
y
for removal. When
reinstallin
g
the refri
g
erator, make certain that the con-
nections of the intake and exhaust pipin
g
is properl
y
sealed. If dama
g
e occurs to the "O" rin
g
seals of the
flexible pipin
g
, contact
y
our dealer or a Norcold Service
Center to obtain new "O" rin
g
seals. After reinstallin
g
,
check the
g
as fittin
g
connections for leaks.
Do not
check for leaks with an open flame.
FLUE TUBE
PALE BLUE
OUTER CONE
SHARP BLUE
INNER CONE
BURNER
Fi
g
ure 7
Orifice Adapter
Fittin
g
Press-fitted
Orifice
Burner
One-piece Assembl
y
Fi
g
ure 8
WARNING
10