Navien NPE-240A Installation Manual page 39

3. Once the front cover is removed, place it in a safe location to
prevent accidental damage. With the internal components
exposed, locate the gas inlet pipe and the Gas Valve near the
left side of the unit which are highlighted in Figure 2.
4. Use a Phillips screwdriver to remove the two screws at Location
A - the connection below the Gas Valve where it connects
to the pipe. See Figure 3 for reference. Once the screws are
removed, carefully separate the pipe from the Gas Valve.
5. Once the gas inlet pipe is detached from the Gas Valve, find
Location B - the connection above the Gas Valve where it is
attached to the Fan Motor Assembly. Carefully remove the four
screws by hand using a Phillips screwdriver and pull the Gas
Valve away from the Fan Assembly to access the Gas Orifice.
Location B:
Remove four
(4) screws here
Location A:
Remove two (2)
screws here
Figure 3. Detaching Gas Valve from
Gas Inlet Pipe and Fan Motor Assembly
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 two (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 water heaters are shipped ready to fire natural gas
ONLY.
Appendixes 39