Navien NHW700, Руководство пользователя

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21 Maintaining the Water Heater
3. Open the hot water faucet that is closest to the
water heater.
4. Use a hair dryer or a portable electric heater to
heat up both the primary and secondary Heat
Exchangers.
5. Check every few minutes to see if water is
running at the open faucet.
6. When the water starts flowing again, check the
water heater and piping for leaks. If you detect
any leaks or the water heater is not operating
properly, contact an authorized technician or
licensed professional.
NOTICE
If the unit will not be used immediately, close off
all gas and water shutoff valves, drain all of the
water out of the unit and the plumbing system
to prevent the unit and system from freezing,
and bleed the gas out of the gas line.
To ensure that the water heater does not freeze,
follow these guidelines:
●
Do not unplug the power supply cord, except
for routine maintenance. The water heater
has a freeze protection function that requires
electricity. The freeze protection function will
operate regardless of whether or not the power is
turned on or off, as long as the electric supply is
still connected.
●
Do not close the gas shut-off valve,
except for
routine maintenance, as this will limit additional
freeze protection.
●
If the power or gas supplies must be
disconnected for an extended period, drain the
water heater. Freezing damage may occur if there
is a loss of power or an interruption in the gas
supply to the water heater.
If you are not using your water heater for an
extended period:
1. Completely drain the water out of the water
heater.
2. Disconnect the power supply to the water
heater. This prevents your water heater from
freezing and being damaged.
If hot water will not flow and you suspect that the
water heater is frozen, follow these steps:
1. Press the Power button on the front panel to
turn off the water heater.
2. Close the gas shut-off valve.
OPEN
CLOSE
OPEN
CLOSE
OPEN
CLOSE
Opened
Gas
Shut-Off
Valve
Closed