105
Appendixes
7. Once the Gas Orifice is exposed, remove the two screws that
hold the part in place. Remove the Gas Orifice from its housing
and prepare the new Gas Orifice for the LP or High Altitude
conversion for installation.
Remove 2
screws here
Figure 4. Access to Gas Orifice in Fan Assembly
WARNING
●
DO NOT adjust or attempt to measure gas valve outlet
pressure. The gas valve is factory-set for the correct outlet
pressure. This setting is suitable for natural gas and propane,
requiring no field adjustment.
●
Attempting to alter or measure the gas valve outlet pressure
could result in damage to the valve, causing potential severe
personal injury, death or substantial property damage.
Navien NFC boilers are shipped ready to fire natural gas
ONLY.
O-ring
Packing
Gas Orifice
Figure 5. Exploded View of Gas Pipe Assembly
Summary of Contents for NFC-175
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