Noritz ecoTOUGH NRC98-DV Owner's Manual page 19

If the water heater will not be used for a long period of time,
Drain the water.
Drain the water as follows:
CAUTION
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
Drain water into a bucket to prevent water damage.
1. Close the gas valve.
2. Turn off ther power button.
3. Turn off the power supply.
Do not touch with wet hands.
4. Close the water supply valve.
5. Fully open all hot water fixtures.
6. Turn the drain plug to the left to open, and then remove.
7. Check that the water is completely drained, close all the
drain plugs and the hot water fixtures after 10 minutes
or more pass from operation of 6.
Fixture
Each drain plug mignt not be visible
if insulation is installed around the
piping.
Drain Plugs
19