Lp Gas System; Pressure Requirements; Testing For Lp Gas Leaks - Norcold N109X Series Service Manual

DC power connections
Gas outlet fitting
Pressure
test port

Pressure Requirements

When working on or near the LP gas system:
Do not smoke or light fires! Extinguish all
n
open flames!
Do not use an open flame to leak test any of
n
the LP gas system components. LP gas is highly
flammable and explosive.
n Do not connect the refrigerator directly to the
LP gas tank. Always use an approved pressure
regulator between the LP gas tank and the
refrigerator LP gas system.
n To prevent damage to connections, piping,
and components, always use two wrenches
to tighten or loosen connections. Damaged
connections, piping, and components create the
potential for gas leaks.
The refrigerator LP gas system, shown in Figure 15, is
for propane gas use only. The system working pressure
is 10.5 to 11.5 in. water column. Propane gas pressures
below 10.5 in. w.c. or above 11.5 in. w.c. will affect heat
output which will directly affect cooling efficiency.
Propane gas flow control is monitored electronically by
the control's flame sensing circuit. If the flame sensing
circuit does not detect a burner flame within 30 seconds
after initiating ignition, power to the gas valve is turned
off and gas mode operation is locked out.
Refrigerator Service Manual
Gas valve
Burner tube
Gas inlet fitting
Manual shut-off
RV
(shown closed)
LP gas supply
figure 15. LP gas system components
WARNING

LP GaS SyStEM

Flue tube
Flue baffle
LP16 orifice assembly

testing for LP Gas Leaks

Do not wet or spray liquids on or near electrical
connections or electronic components. Many liquids,
including leak detection solutions, are electrically
conductive and can create an electric shock hazard,
short electrical components, and/or damage
electronic circuits.
Do not use leak test solutions that contain ammonia
or chlorine. Ammonia and chlorine attack copper
and brass components.
Leak testing can be accomplished using an electronic
leak detector or a commercial grade leak test solution.
The use of homemade soap and water leak test
solutions should be avoided if possible. When applying
a leak test solution, apply the solution over the entire
joint using a small brush or spray applicator.
Due to low system operating pressure, it may take a
few minutes for bubbles to appear if the connection is
leaking. Hidden joints should be examined thoroughly
using an inspection mirror.
Canister
Electrode
Burner
Burner box base
WARNING
CAUTION
23
N109X Models