Navien CH-180, Service Manual

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© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l Version 1 .0
8.2.3. Transformer
1. Turn off the gas supply.
2. Turn off the 120V power supply.
3. Turn off the water supply.
4. Remove the four screws securing
the front panel. Remove front panel.
5. Pull out the PCB. (refer to 8.2.1
PCB)
6. Loosen the 2 screws from power
transformer.
7. Pull out the power transformer.
8. Replace with new power trans
former.
9. Tighten the 2 screws from power
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.
Figure 6
1 2 1