Navien CH-180, Руководство пользователя

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Draining the Combination boiler
Draining the Combination boiler - Parts you need to know:
Procedure to drain the combination boiler (figure below). You will need to prepare a
bucket to collect some of the water to be drained.
1. Turn off the power to the unit.
2. Close the gas valve.
3. Close the water supply valve on the inlet to the unit. If there is no valve, turn off the
water supply at the water meter.
4. Open the pump drain coke on the pump and allow the water to drain.
5. Open the pump drain coke at hot outlet side, open the drain valves inside the unit,
open the drain valve at the pump and remove the filter from the cold inlet side.
6. When the water is completely drained, return the pump drain coke and the inlet filter
and close the pump drain coke inside the unit.
Pump Drain plug