Navien NPE-240A Service Manual

System Details 31
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.
LP
NPE-150S NPE-180A/ 210A/ 240A/ 180S/ 210S/ 240S
NG
Figure 6. Orifice identification
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.
8. Replace the gas inlet pipe 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.
9. Set the Front Panel Dip switch according to the gas type.
WARNING
Be sure to turn off the power before changing the DIP switch
setting.
O-ring
Gas Orifice
<NPE-150S>
O-ring
Gas Orifice
<NPE-180A/ 210A/ 240A/ 180S/ 210S/ 240S>
Figure 5. Exploded view of Gas assembly

Navien NPE-240A Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Energy Factor	0.97
Energy Efficiency	97%
Voltage	120V
Ignition Type	Electronic
Maximum Input	199, 900 BTU/h
Water Connection Size	3/4"
Gas Connection Size	3/4"
Warranty	15-year on heat exchangers, 5-year on parts, 1-year on labor
Dimensions	17.3" W x 13.2" D x 27.4" H