Draining The Water For Maintenance Or For Freeze Prevention; Manual Draining - Noritz NR50-OD Service Manual

Draining the Water for Maintenance or for Freeze Prevention :

CAUTION
Drain water into a bucket to prevent water damage.
Drainage Using the Remote Controller (NCC/NRC/841/842 series only)
(1) Turn the power on/off
1
button "off".
(2) Press the flow meter alarm set
button for about two seconds
until the alarm sounds.
The maximum hot water
temperature will flash.
(3) Press the flow meter alarm
set button again.
(4) Press the setting button
marked " ". The display
will change from "oF" to "on"
after the button is pushed.
Close the water supply
2
valve.
Fully open all hot water fixtures.
3
Open all drain plugs and drain the water out of
4
the unit.
5
When the water is completely drained, replace
all drain plugs and close the hot water fixtures.
Close the gas valve and disconnect
6
the electrical power supplied to the unit.
Do not touch with wet hands.
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain
hot after it is turned off.
High Temperature
1
2
(Ex. 120°F)
3
Fixture
4
5
6
Drain Plugs
(ex. NCC199-SV/N-0841MC)
93

Manual Draining

Close the gas valve.
(1) Turn the power on/off button "On".
(2) Turn and leave open
Fixture
the hot water fixtures
for more than 2 minutes
and close.
* If multiple units are being used,
drain two minutes for each unit.
* An 11 Error Code may appear on
the remote controller.
This is not a malfunction of the unit.
Do not turn Power ON/OFF Button OFF.
Close the water supply
valve and disconnect
the electrical power
supplied to the unit.
Do not touch with wet hands.
Fully open all
Fixture
hot water fixtures.
Open all drain plugs and drain the
water out of the unit.
When the water is completely drained,
replace all drain plugs and close the
hot water fixtures.