Temperature Pressure Relief Valve - Kenmore POWERMISE 12 Owner's Manual

Temperature-Pressure Relief Valve
This heater is provided with a properly certified combination
temperature - pressure relief valve by the manufacturer.
T h e v a l v e i s c e r t i f i e d b y a n a t i o n a l l y r e c o g n i z e d
testing laboratory that maintains periodic inspection of
production of listed equipment of materials as meeting
the requirements for Relief Valves for Hot Water Supply
Systems, ANSI Z21.22, CSA 4.4 and the code requirements
of ASME.
If replaced, the valve must meet the requirements of local codes,
but not less than a combination temperature and pressure relief
valve certified as indicated in the above paragraph.
The valve must be marked with a maximum set pressure not
to exceed the marked hydrostatic working pressure of the
water heater (150 psi = 1,035kPa) and a discharge capacity
not less than the water heater input rate as shown on the
model rating plate.
For safe operation of the water heater, the relief valve
must not be removed from its designated opening nor
plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designed for the
relief valve. Position the valve downward and provide
tubing so that any discharge will exit only within 6 inches
(153 mm) above a floor drain or external to the building,
see Figure 16. Be certain that no contact is made with
any live electrical part. The discharge opening must not
be blocked or reduced in size under any circumstances.
Excessive length, over 30 feet (9.14 m), or use of more than
four elbows can cause restriction and reduce the discharge
capacity of the valve.
No valve or other obstruction is to be placed between the
relief valve and the tank. Do not connect tubing directly
to discharge drain unless a 6 inch air gap is provided. To
prevent bodily injury, hazard to life, or property damage, the
relief valve must be allowed to discharge water in quantities
should circumstances demand. If the discharge pipe is not
connected to a drain or other suitable means, the water flow
may cause property damage.
The Discharge Pipe:
• Should not be smaller in size than the outlet pipe size of the
v a l v e , o r h a v e a n y r e d u c i n g c o u p l i n g s o r o t h e r
restrictions.
• Should not be plugged or blocked.
• Should be of material listed for hot water distribution.
• Should be installed so as to allow complete drainage of
both the temperature-pressure relief valve, and the
discharge pipe.
• Should terminate a maximum of six inches above a floor drain
or external to the building.
• Should not have any valve between the relief valve and tank.
14
FIGURE 17.