DRAFT
NOT FOR PUBLIC RELEASE
25
www.norcold.com/cda N500/N510 ModelsRefrigerator Service Manual
LP GAS SYSTEM - N510
Components
Solenoid Gas Valve
The solenoid gas valve, shown in Figure 22, controls
the flow of gas from the RV gas supply to the burner.
Integrated in the valve’s body are a manual shutoff and
pressure tap. The valve's manual shutoff is a spring-
loaded, quarter turn, manually operated valve.
To manually shut off gas to the burner, pull the handle
slightly away from the body of the valve, then turn it
one-quarter turn (90 degrees) counterclockwise.
The solenoid gas valve inlet fitting is 3/8 inch, male
threads; the outlet fitting is 1/4 inch, male threads.
The orifice meters the flow of gas to the burner. The
N510 model requires the LP10 orifice. See Figure 23. A
restricted, clogged, or damaged orifice will affect the
burner’s heat output, which in turn affects the
performance of the cooling unit when the refrigerator is
operating on LP gas. The orifice should be checked and
cleaned annually to maintain the LP gas combustion
system at peak performance. It should also be checked
before and after seasonal storage, and before the
recreational vehicle is placed in service. See page 28
for more information on cleaning the burner and its
components.
!
WARNING:
Do not separate the orifice from its threaded adaptor!
The orifice and its adaptor are a sealed assembly.
Separating the orifice from the threaded adaptor can
cause LP gas leakage. An LP gas leak can ignite and
cause an explosion and/or fire which could result in
substantial property damage, burn injury, or death.
Orifice
DC power connections
Mounting bracket
Solenoid
Gas inlet fitting
(from RV LP gas
system)
Manual shut-off
(shown closed)
Gas pressure
test port
Gas outlet
fitting
Figure 21. N510 LP gas system components
Figure 22. N510 solenoid gas valve
Pressure
test port
DC connections
LP10 orifice assembly
Electrode
Canister
Burner
Flue tube
Flue baffle
Burner tube
Burner box base
RV
LP gas supply
Gas valve
Gas inlet fitting
Gas outlet fitting
Manual shut-off
(shown closed)
Figure 23. LP10 orifice
L
P
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