Fully open all hot
water fixtures.
4
Open all cleanout plugs by turning
them to the left.
(Position of the cleanout plugs
P20)
* Draining starts.
A bucket for draining water.
1
Close the water
supply valve.
6
Close the gas
valve.
2
3
Fully open all hot
water fixtures.
Fixture
Follow the procedure on Pgs. 16 - 17,
and set “Drain the heater” to “yes”.
CAUTION
Whenever the unit is checked, maintained, or drained, the power
switch must be turned “Off”, and it must be allowed to cool down first.
To prevent scalding.
The water within the appliance is still very hot , for a short period after use.
Drainage using the remote controller RC-7508M
2
1. Turn the power switch “On”.
(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”.
Manual draining
Close the water
supply valve.
3
4
5
When the water is completely drained,
replace all drain plugs and close the hot
water fixtures.
Fixture
5
Open all cleanout plugs by turning
them to the left.
(Position of the cleanout plugs
P20)
* Draining starts.
6
When the water is completely drained,
replace all drain plugs and close the hot
t
fi t
Close the gas
valve.
1
Displayed
for 10
minutes.
When Unused for an Extended Period-1
Preparation
If the water heater will not be used for a long period of time,
drain the water.
Fixture
Here
Fixture
Fixture
WHEN UNUSED FOR AN EXTENDED PERIOD
22
