22
Draining the Water Heater (cont.)
Preferred Drain Method
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. It is highly recommended
to install isolator valve kits because 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
Hot Water
Service Valve
Pressure
Relief Valve
Relief
Valve
Water
Outlet
Water
Outlet
Water
Inlet
Water
Inlet
Drain
Drain
1
2
3
CARING FOR YOUR WATER HEATER
Care Instructions
