Navien NPE-240A Service Manual

Replacement of Parts 125
6. Remove the 2 screws that attaches the air pressure sensor to
the burner assembly.
7. Pull out the air pressure sensor.
8. Replace the old air pressure sensor with the new part.
9. Reattach the air pressure sensor hose.
10. Connect the air pressure sensor wiring connector.
11. Place the front panel back onto the unit and secure it using the
4screws.
12. Turn on water supply, power supply, and gas supply to the
unit.
NOTE
Confirm that the new air pressure sensor is in the proper
position before turning the unit back on.
6.2.7 Main Gas Valve
1. Turn off the gas supply to the unit.
2. Disconnect the unit from the power supply.
3. Turn off the water supply to the unit.
4. Remove the 2screws.
5. Disconnect the wiring connector at the gas valve.
Figure 13
6.2.6 APS
1. Turn off the gas supply to the unit.
2. Disconnect the unit from the power supply.
3. Turn off the water supply to the unit.
4. Remove the air pressure sensor wiring connector (Figure 11).
Figure 11
5. Remove the hose from the air pressure sensor.
Figure 12

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