Navien CH-180, Operation Manual

Page: 34 / 46

Combination water heater operation
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Auto feeder of the Combination Water Heater
1. Make sure the pump drain coke and the DHW cold water inlet filter have been
inserted and that the drain coke inside the unit are closed.
2. Slowly open the water supply valve on the inlet to the unit. If there is no valve
at the combination water heater, turn on the water supply at the water meter
slowly.
3. Inspect and make sure there is no water leaking.
4. The combination water heater has an automatic feeder to fill water to the
space heating side. It will fill automatically and stop. Please check the manual
air release to make sure water filled properly.
5. Once all of the air has been bled out of the hot water lines, close all hot water
faucets.
6. Turn power on to the unit.
7. Open the gas valve.
8. Open a hot water faucet to test for normal operation; the unit should fire and
operate normally.
MAINTENA
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