Navien NP Condensing Tankless Gas Water Heater - Service Manual
Navien NP Condensing Tankless Gas Water Heater - Service Manual
Navien NP Condensing Tankless Gas Water Heater - Service Manual
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8.2. Components Replacement Instructions<br />
8.2.1. PCB<br />
1. Turn off the gas supply<br />
2. Turn off the 120V power supply<br />
3. Turn off the water supply<br />
4. Loosen the PCB right-side screw from<br />
bottom base.<br />
5. Remove the all connecting housing into the<br />
PCB.<br />
7. Loosen the PCB bracket 2 screws<br />
from base.<br />
< Figure 3 ><br />
< Figure 1 ><br />
6. Loosen the PCB 2 screw from bottom<br />
base.<br />
8. Pull out the PCB.<br />
9. Attach the new PCB tighten screws.<br />
10. Connect the all connecting housing into<br />
the PCB.<br />
11. Install front panel using 4(four) screws.<br />
12. Turn on water supply, power supply,<br />
and gas supply.<br />
13. Perform the measuring<br />
NOTE<br />
Connecting ports must be right color<br />
and place.<br />
< Figure 2 ><br />
©<strong>Navien</strong> America Inc. 2010<br />
136<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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