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When Unused For An Extended Period - Andrews WH42 Owner's Manual

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When Unused for an Extended Period-1

If the water heater will not be used for a long period of time,
drain the water.
CAUTION
To prevent scalding.
The water within the appliance is still very hot , for a short period after use.
Preparation
Drainage using the remote controller RC-7508M
Follow the procedure on Pgs. 16 - 17,
1
and set "Drain the heater" to "yes".
Close the water
2
supply valve.
Fully open all hot
3
water fixtures.
Open all cleanout plugs by turning
4
them to the left.
(Position of the cleanout plugs
* Draining starts.
When the water is completely drained,
5
replace all drain plugs and close the hot
water fixtures.
Close the gas
6
valve.
Whenever the unit is checked, maintained, or drained, the power
switch must be turned "Off", and it must be allowed to cool down first.
A bucket for draining water.
Here
Displayed
for 10
minutes.
Fixture
P20)
Manual draining
Close the gas
1
valve.
1. Turn the power switch "On".
2
(If there is no remote controller, make
sure that the power is plugged in.)
2. Open the hot water
tap fully, leave it in
that position for at
least one minute,
and then turn off the tap.
* For conjunct setting: Allow at least one
minute per unit
* Error display <11> may appear on the
remote controller, but this is not an error.
Do not turn the power switch "Off".
Close the water
3
supply valve.
Fully open all hot
4
water fixtures.
Open all cleanout plugs by turning
5
them to the left.
(Position of the cleanout plugs
* Draining starts.
6
When the water is completely drained,
replace all drain plugs and close the hot
water fixtures.
Fixture
Fixture
Fixture
Fixture
P20)
19
(Continued)

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