132 Appendixes
GAS : NG
20052127A
4.8/7.90
GAS : NG(H)
20052133A
5.05/8.4
GAS : LP
20052134A
3.90/6.00
<NFC-250/175H, 250/200H Orifice Identification>
Figure 6. Orifice Identification
8. Remove the Gas Orifice, ensure that the packing
is properly seated inside the port, and then
install the new Gas Orifice for use with Propane
gas. Ensure that the Orifice is properly seated on
the packing inside the port before proceeding
to the next step.
Packing
9. Replace the gas valve outlet adapter to its
original position and use all screws to secure all
connections.
Note
Do not overtighten as this may
damage or crack the components.
DANGER
Inspect the O-ring between the gas valve and
gas valve inlet adapter whenever they are
disassembled. The O-ring must be in good
condition and must be installed. Failure to
comply will cause a gas leak, resulting in severe
personal injury or death.
10. Set the PCB DIP switch to change the gas type.
For LP, set DIP SW2 (Set of 8 Switches) #1 to ON.
For NG, set DIP SW2 (Set of 8 Switches) #1 to
OFF.
O-ring
Packing
Gas Orifice
Figure 5. Exploded View of Gas Pipe Assembly
DANGER
See Figure 5. Inspect the O-ring between the
gas valve and gas valve inlet adapter whenever
they are disassembled. The O-ring must be in
good condition and must be installed. Failure to
comply will cause a gas leak, resulting in severe
personal injury or death.
Summary of Contents for NFC-250/175H
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