Freeze Protection; Draining The Water Heater - Rheem RTGH-95DV Use And Care Manual

CARING FOR YOUR WATER HEATER
Draining the Water Heater (cont.)
Standard Drain Method
Service isolator valve kits may be purchased from
the manufacturer, distributor, or place of purchase.
The kits include two full-port isolation valves to
be used in the inlet and outlet water lines. These
kits provide a means for full diagnostic testing and
ease of system flushing.

Freeze Protection

WARNING:
water heater can cause serious personal injury
from scalding and/or product damage.
Whenever the water heater may be exposed to
freezing conditions, make sure to completely drain
the water from the unit. See page 20.
Freezing conditions come from the ventilation
system on direct-vent models and from exposure
to cold air on outdoor models.
All of these water heaters are equipped with
a freeze protection electric heater. This heater
prevents freezing inside the water heater down to
an ambient temperature of approximately -30°F
(-34°C). These temperatures are all based on
temperatures without wind.
The heater only protects the internal components
of the water heater.
NOTICE:
the power supply to the water heater will also
disconnect the power to the heater.
External piping and valves require additional
freeze protection. One method is to wrap
insulation around the piping and valves.
Another method is to turn on a hot water faucet
and leave a small amount of water running at a
faucet. This will protect the water heater, piping,
and valves from freezing.
22
Failure to drain the
Unplugging or disconnecting
Hot Water
Service Valve
Pressure Pressure
Relief Valve Relief Valve
Water Water
Outlet Outlet
Drain Drain
Running Water Freeze Protection
1
Turn off the water heater by pressing the
POWER ON/OFF button on the control panel.
2
Close the gas shut-off valve(s).
3
Open a hot water faucet slightly until the water
stream is approximately 1/8 in. (0.3 cm). Be sure
to check the flow periodically.
Cold Water
Service Valve
Water Water
Inlet Inlet