Navien NPE-32AWE Installation Manual page 49

6. 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
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 or substantial property
damage. Navien water heaters are shipped ready to fire
natural gas ONLY.
Figure 5. Exploded view of Gas assembly
DANGER
See Figure 5. Inspect the O-ring and packing between
the venturi, gas pipe and gas valve whenever they are
disassembled. The O-ring and packing must be in good
condition and must be installed. Failure to comply will
cause a gas leak, resulting in severe personal injury.
7. Replace the old Orifice piece with the new part for use with
LP gas. Ensure that the Orifice is properly seated inside the
port before proceeding to the next step.
Packing
Gas Orifice
O-ring
Appendixes 49