Manual Draining Of The Water Heater - Rinnai RUR98i Manuel D'installation Et D'utilisation

Manual Draining of the Water Heater

WARNING
If the water heater is not going to be used during a period of possible freezing weather, it is recommended that
the water inside the water heater be drained.
To manually drain the water:
1. Shut off cold water supply and gas supply.
2. Turn off the temperature controller.
3. Disconnect the power to the water heater.
4. Place a container to catch the water. Open hot water tap
or open hot water drain plug at the hot water outlet.
5. Remove cold water inlet filter.
6. Unscrew the water drain plug from the drain line.
7. Remove the check valve drain plug.
8. Remove pump drain plug.
9. Remove condensate trap drain plug.
To resume normal operation:
1. Confirm that all water drain plugs are removed, that the gas supply is turned off, and that all taps are closed.
2. Install pump drain and condensate trap drain plugs.
3. Install check valve drain and water drain plugs.
4. Install cold water inlet filter.
5. Open the cold water supply.
6. Open a tap and confirm that water flows, and then close.
7. Turn on the power.
8. After confirming that the temperature controller is off, turn on the gas supply.
9. Turn on the temperature controller.
Running a low volume of water through the water heater to prevent freezing
If the temperature exceeds the ability of the water heater to freeze protect
itself, or if power is lost, the following steps may prevent the water heater
and external piping from freezing. (Units connected with EZ Connect (2
unit link) should be drained to prevent freezing if not in use.)
1. Turn the water heater off.
2. Close the gas supply valve.
3. Turn on a hot water tap to flow water about 0.1 gal/min or where the
stream is about 0.2 inches thick.
When the water heater or external piping has frozen
1. Do not operate the water heater if it or the external piping is frozen.
2. Close the gas and water valves and turn off the power.
3. Wait until the water thaws. Check by opening the water supply valve.
4. Check the water heater and the piping for leaks.
72
To avoid burns, wait until the equipment cools down before draining the water. The
water in the appliance will remain hot after it is turned off.
KBP Series Manual
Cold water inlet
with filter
Hot water outlet
with filter (or plug)
Pump drain plug
Condensate trap
drain plug
ON!
COLD
HOT
Gas
Connection
Water drain
plug
Check valve drain
plug
Condensate
drain line
0.1 gal/min or
about 0.2 inch
thick