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Whirlpool Energy Smart Residential Electric Water Heater Installation Instructions And Use & Care Manual page 6

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Please note the following:
DO NOT install this water heater with iron piping.
The system should be installed only with new piping
that is suitable for potable (drinkable) water such as
copper, CPVC, or polybutylene. DO NOT use PVC
water piping.
DO NOT use any pumps, valves, or fittings that are
not compatible with potable water.
DO NOT use valves that may cause excessive
restriction to water flow. Use full flow ball or gate
valves only.
DO NOT use 50/50 tin-lead solder (or any lead
based solder) in potable water lines. Use 95/5 tin-
antimony or other equivalent material.
DO NOT tamper with the electronic control board,
temperature sensors, heating elements, electrical
connections, or temperature and pressure relief
valve. Tampering voids all warranties. Only qualified
technicians should service these components.
DO NOT use with piping that has been treated with
chromates, boiler seal, or other chemicals.
DO NOT add any chemicals to the system piping
which will contaminate the potable water supply.
Closed
System/Thermal
Expansion
Periodic discharge of the temperature and pressure
relief valve may be due to thermal expansion in a
closed water supply system. The water utility supply
meter may contain a check valve, backfiow preventer,
or water pressure reducing valve. This will create a
closed water system. During the heating cycle of the
water heater, the water expands causing pressure
inside the water heater to increase. This may cause the
temperature and pressure relief valve to discharge
small quantities of hot water. To prevent this from
happening, there are two recommendations:
1.
Install a diaphragm-type
expansion tank that is
suitable for potable water on the cold water supply
line. The expansion tank must have a minimum
capacity of 1.5 U.S. gallons for every 50 gallons of
stored water.
.
Install a 125 PSI pressure relief valve in the cold
water supply line. Make sure the discharge of this
valve is directed to an open drain and protected
from freezing. Contact the local water supplier or
plumbing inspector for information on how to
control this situation. Do not plug the temperature
and pressure
relief valve.
Temperature
and Pressure
Relief Valve
Explosion
Hazard
If the temperature
and pressure
relief
valve is dripping
or leaking, have a
licensed
plumber
repair it.
Do not plug valve.
Do not remove valve.
Failure to follow
these instructions
can
result in death or explosion.
Figure
5
Temperature
and
Pressure
Relief
Valve
Installation
Optional
location
some
r'-'l
F
models only
Temperature
and
,/_
Pressure
Relief
Valve
Discharge
Line
314 inch
rain.
Do not cap or plug.
Drain Pan
(_
_
_
._
6ianxChmu
m
Drain _
For protection
against
excessive
pressures
and
tern peratures,
a tern peratu re and pressu re relief valve
must be installed in the opening
marked "T & P RELIEF
VALVE" (See Figure 5).
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 not less than a combination
temperature
and pressure
relief valve certified 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 Water
Supply Systems,
ANSI 721.22 -1986. This valve must
be marked with the maximum
set pressure
not to
exceed
the marked maximum
working pressure
of the
water heater. Install the valve into an opening
provided
and marked for this purpose in the water heater, and
orient it or provide tubing so that any discharge from the
valve exits only within 6 inches above, or at any
distance below, the structural floor, and does not
contact any live electrical part. The discharge opening
must not be blocked or reduced in size under any
circumstance.

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