7
Please note the following:
•
The system should be installed only with piping that is
suitable for potable (drinkable) water such as copper,
CPVC, or polybutylene. This water heater must not be
installed using iron piping or PVC water piping.
•
Use only pumps, valves, or fittings that are compatible
with potable water.
•
Use only full flow ball or gate valves. The use of valves
that may cause excessive restriction to water flow is
not recommended.
•
Use only 95/5 tin-antimony or other equivalent solder.
Any lead based solder must not be used.
•
Piping that has been treated with chromates, boiler
seal, or other chemicals must not be used.
•
Chemicals that may contaminate the potable water
supply must not be added to the piping system.
As water is heated, it expands (thermal expansion). In a
closed system, the volume of water will grow. As the volume
of water grows, there will be a corresponding increase
in water pressure due to thermal expansion. Thermal
expansion can cause premature tank failure (leakage). This
type of failure is not covered under the limited warranty.
Thermal expansion can also cause intermittent temperature-
pressure relief valve operation: water discharged from the
valve due to excessive pressure build up. The temperature-
pressure relief valve is not intended for the constant relief of
thermal expansion. This condition is not covered under the
limited warranty.
A properly-sized thermal expansion tank should be installed
on all closed systems to control the harmful effects of thermal
expansion. Contact a plumbing service agency or your retail
supplier regarding the installation of a thermal expansion tank.
IMPORTANT: Do not plug or remove the temperature and
pressure relief valve.
Closed System/Thermal Expansion
For protection against excessive pressures and
temperatures, a temperature and pressure relief valve must
be installed in the opening marked “T & P RELIEF VALVE”
(See Figure 9).
CAUTION: To reduce the risk of excessive pressures and
temperatures in this water heater, install temperature and
pressure relief protective equipment required by local codes,
but no less than a combination temperature and pressure
relief valve certi
fi
ed by a nationally recognized testing
laboratory that maintains periodic inspection of the production
of listed equipment or materials, as meeting the requirements
for Relief Valves and Automatic Shutoff Devices for Hot
Temperature and Pressure
Relief Valve
Figure 9
Temperature And Pressure
Relief Valve Installation
Optional Location
Some Models Only
Temperature And
Pressure Valve
Discharge Line
3/4 Inch Min.
Do Not Cap Or Plug
Drain Pan
Floor Drain
6” Maximum
Air Gap
Explosion Hazard
If the temperature and pressure relief valve
is dripping or leaking, have a qualified
person replace it.
Examples of a qualified person include:
licensed plumbers, authorized gas company
personnel, and authorized service
personnel.
Do not plug valve.
Do not remove valve.
Failure to follow these instructions can
result in death or explosion.
WARNING
Explosion Hazard
If the temperature and pressure relief valve
is dripping or leaking, have a qualified
person replace it.
Examples of a qualified person include:
licensed plumbers, authorized gas company
personnel, and authorized service
personnel.
Do not plug valve.
Do not remove valve.
Failure to follow these instructions can
result in death or explosion.
WARNING
