Installation Instructions
Temperature-Pressure Relief Valve
AWARNING
At the time of manufacture this water heater was provided with a combination
Automatic Gas Shutoff Devicesfor Hot Water Supply Systems, and the latest edition of ANSI Z21.22 and the code require- ments of ASME. If replaced, the valve must meet the require- ments of local codes, but not lessthan a combination tempera-
ture and pressure relief valve certified as meeting the require- ments for Relief Valves and Automatic Gas Shutoff Devicesfor
Hot Water Supply Systems, ANSI Z21.22 by a nationally recog- nized testing laboratory that maintains periodic inspection of production of listed equipment or materials.
The valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of thq water heater (150 Ibs./sq. in.) and a discharge capacity not less
than the water heater input rate as shown on the model rating plate. (Electric heaters - watts divided by 1000 x 3415 equal BTU/Hr. rate.)
Your local jurisdictional authority, while mandating the use of a
and ASME, may require a valve model different from the one furnished with the water heater.
Compliance with such local requirements must be satisfied by the installer or end user of the water heater with a locally pre- scribed
nated opening in the water heater in place of the factory fur- nished valve.
For safe operation of the water heater, the relief valve must not be removed from it'sdesignatedopening or plugged.
The
Positionthe valve downward and provide tubing so that any dis-
charge will exit only within 6 inches above, or at any distance below the structural floor. 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, or use of more than four elbows can cause restriction and reduce the discharge capacityof 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 unlessa 6" air gapis provided. To prevent bodilyinjury, haz- ard to life, or property damage, the relief valve must be allowed to discharge water in quantities shouldcircumstancesdemand. If the discharge pipe is not connected to a drain or other suitable means, the water flow may causeproperty damage.
The Discharge Pipe:
Must not be smaller in size than the outlet pipe size of the valve, or have any reducing couplingsor other restrictions. Must not be plugged or blocked.
Must be of material listed for hot water distribution.
Must be installed so as to allow complete drainage of both the
Must terminate at an adequate drain.
Must not have any valve between the relief valve and tank.
(cont'd)
AWARNING
The
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, and replace the
HOT | COLD |
SHUT OFF
VALVE
PRESSURE
RELIEF VALVE
PIPE (Do not cap or plug)
)_GAP
FLOOR DRAIN
RELIEFVALVEOPENING
At the time of manufacture, this water heater was provided with a combinationtem-
Your local iurisdictional authority, while mandating the use of a
relief valve complying with ANSI Z21.22 and ASME, may require a valve model differ- ent from the one furnished with the water heater
Compliance with such local requirementsmust be satisfied by the installer or end user of the water heater with a locally prescribed
See manual heading
nance of relief valve, discharge line, and other safety precauuons
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