Navien NCB-24LSWE, Руководство по обслуживанию

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NCB Service Manual 129 Version 1.0
6.2.11 3-way Valve
1. Turn off the gas supply to the unit.
2. Turn off the 230V power supply to the unit.
3. Turn off the water supply to the unit. Drain all water
from the appliance.
4. Remove the Circulation Pump (see page 128).
5. Remove the clip on the 3-way valve.
Figure 30
6. Replace with old 3-way valve with the new part.
7. Connect the 3-way valve wire housing.
8. Turn on water supply, power supply, and gas supply
to the unit.
6.2.12 Water Pressure Sensor
1. Turn off the gas supply to the unit.
2. Turn off the 230V power supply to the unit.
3. Turn off the water supply to the unit. Drain all water
from the appliance.
4. Disconnect the water pressure sensor wire housing.
Figure 32
5. Remove the clip on the WPS valve.
6. Replace with new water pressure sensor.
7. Connect the water pressure senor wire housing.
NOTE
Always use proper O-rings at the
water pressure valve connection to
ensure tight seals