Navien NP-180, Service Manual

Page: 140 / 179

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138
Versi
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8.2.3. Transformer
1. Turn off the gas supply.
2. Turn off the 120V power supply.
3. Turn off the water supply.
4. Loosen the PCB 2 screw from bottom base.
5. Pull out the PCB. (refer to 8.2.1 PCB)
6. Loosen the 2 screws from transformer.
7. Pull out the transformer.
8. Replace with new transformer.
9. Tighten the 2 screws from transformer.
10. Replace the PCB. (refer to 8.2.1 PCB)
11. Install front panel using 4(four) screws.
12. Turn on water supply, power supply,
and gas supply.
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