Technical Documents

8
INSTALLATION
REQUIRED ABILITY
Installation or service of this hot water generator requires ability


or Service Agency on page 2.
TEMPERATURE-PRESSURE RELIEF VALVE

combination temperature - pressure relief valve by the manufacturer.
         
that maintains periodic inspection of production of listed equipment of
materials as meeting the requirements for Relief Valves for Hot Water

of ASME.
If replaced, the new valve must meet the requirements of local codes,
but not less than a combination temperature and pressure relief

The new valve must be marked with a maximum set pressure not to
exceed the marked hydrostatic working pressure of the water heater
         

model rating plate.
For safe operation of the water heater, the temperature and pressure
relief valve must not be removed from its designated opening nor
plugged. The temperature-pressure relief valve must be installed

Install discharge piping so that any discharge will exit only within 6

Be certain that no contact is made with any live electrical part. The
discharge opening must not be blocked or reduced in size under
         
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 discharge piping directly to the drain
    
hazard to life, or property damage, the relief valve must be allowed
to discharge water in adequate quantities should circumstances
demand. If the discharge pipe is not connected to a drain or other

The Discharge Pipe:
 
or have any reducing couplings or other restrictions.
 
 
 
temperature-pressure relief valve and the discharge pipe.
 
external to the building. In cold climates, it is recommended that
the discharge pipe be terminated at an adequate drain inside
the building.
 
valve and the drain.
The temperature-pressure relief valve must be manually operated

one is in front of or around the outlet of the temperature-pressure
        
will not cause any bodily injury or property damage because the
water may be extremely hot. If after manually operating the valve, it
fails to completely reset and continues to release water, immediately
close the cold water inlet to the water heater, follow the draining
instructions in this manual, and replace the temperature-pressure
relief valve with a properly rated/sized new one.
If you do not understand these instructions or have any questions
regarding the temperature-pressure relief valve call the toll free
number listed on the back cover of this manual for technical
assistance.
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements or such
conditions as high line pressure, among others, have installed
devices such as pressure reducing valves, check valves, and back

be a closed system.