34
Preventing Damage from Freezing
1. Turn the unit on with the Power Button on the Remote Controller.
2. Close the gas supply valve.
3. Open a hot water fi xture and let it run for approx. 2 minute, and
then check that the number 11 or F11 is fl ashing on the remote
controller display.
* If multiple units are being used, drain each unit for approx. 2
minute.
* It is possible that a different number may be displayed on the
remote controller, but as long as it is fl ashing,
you may continue.
4. Adjust a hot water fi xture, and keep a small
amount of hot water running.
(0.4L/minute or about 4mm
thick.)
*
If there is a mixing valve, set it to the highest level.
* When linking multiple units, discharge water
equivalent to 0.4L/minute per unit.
5. The fl ow may become unstable from time to time.
Check the fl ow 30 minutes later.
If water will not fl ow because it is frozen
1. Close the gas and water valves.
2. Turn off the operation button.
3. Open the water supply valve from time to time to check whether water is running.
4. When the water is fl owing again, check for water leaks from the equipment and piping, or
follow steps 1 through 4 on P11 (“Initial Operation”).
The freeze prevention heaters will
not prevent the plumbing external
to the unit from freezing. Protect
this plumbing with insulation. If you
are still worried that your heater will
freeze, contact the nearest ANDREWS
WATER HEATERS agent.
When the temperature drops, the
freeze-prevention
heaters
are automatically activated to keep the unit
warm and prevent it from freezing.
Normal cold [
outside temperatures between 0
°
C - 10
°
C with no wind
]
The heater and piping can be damaged if cold temperatures cause water to freeze inside the unit.
The damage can be prevented with the following method:
At these temperatures, the units have freeze prevention heaters that will prevent freezing.
* Do not disconnect the power. The freeze prevention heaters will not work if the power
is disconnected.
* The freeze prevention will work regardless of whether the operation button on the remote
controller has been turned on.
•
If the heater or the piping is frozen, do not use the heater, or it may become damaged.
•
Repairs for damage caused by freezing, is not covered by the warranty.
For severely cold temperatures
[
]
Run water to prevent freezing.
•
This method can be
applied not only to the
heater, but also to the
water supply, water
piping and mixing
valve.
•
Remember that if
the mixing valve is
set to the maximum
level, there is a risk of
scalding.
•
If freezing still might
occur, drain the water
from the unit following
the steps on P21.
outside temperature including wind chill
of less than -10
°
C
Hot Water Fixture
4mm thick
