Freeze Protection - Rheem RTGH-95XLP-2 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
and draining.

Freeze Protection

WARNING:
Failure to drain the 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:
Unplugging or disconnecting the power supply to the
water heater will also disconnect the power to the freeze
protection electric 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
Pressure Relief
Valve
Hot Water Pressure
Service 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 remote control.
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