22
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:
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 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.
Running Water Freeze Protection
Turn off the water heater by pressing the
POWER ON/OFF button on the control panel.
Close the gas shut-off valve(s).
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
Hot Water
Service Valve
Pressure
Relief Valve
Pressure
Relief Valve
Water
Outlet
Water
Outlet
Water
Inlet
Water
Inlet
Drain
Drain
1
2
3
Care Instructions
