Installation Instructions
Temperature-Pressure
Relief Valve
AWARNING
At the time of manufacture this water heater was provided with a
maintains periodic inspectionof productionof listed equip- ment or materials, as meeting the requirements for Relief
Valvesand Automatic Gas Shutoff Devicesfor Hot Water SupplySystems,and the latest edition of ANSI Z21.22 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 meeting the requirements for ReliefValvesand
Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 by a nationally recognized testing laboratory that maintains periodic inspectionof production of listed equipment or materials.
The valve must be marked with a maximum set pressure not to exceed the marked hydrostaticworking pressureof the water heater (150 Ibs./sq.in.) and a dischargecapacity not lessthan the water heater input rate as shownon the
model rating plate. (Electric heaters - watts divided by 1000x 3415 equal BTU/Hr. rate.)
Your localjurisdictional authority, while mandatingthe use
of a
Compliance with such local requirements must be satisfied _)ythe installer or end user of the water heater with a locally prescribed
For safe operation of the water heater, the relief valve must not be removed from it'sdesignated opening or plugged.
The
the relief valve. Positionthe valve downward and provide tubing so that any dischargewill exit only within 6 inches above,or at any distancebelow the structural floor. Be cer- tein that no contact is made with any llve electrical part. The dischargeopening must not be blocked or reduced in size under any circumstances. Excessivelength, over 30 feet, or use of more than four elbowscan causerestriction and reduce the dischargecapacityof the valve.
No valve or other obstruction is to be placed between the relief valve and the tank. Do not connect tubing directly to dischargedrain unlessa 6" 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
(cont'd)
_,WARNING
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 drain-
ing instructions, and replace the
HOT | COLD |
HOT |
|
F_E-
RELIEF VALVE
PRESSURE
PIPE
(Do not cap or plug)
6" AIR GAP
FLOOR IN
shouldcircumstancesdemand. If the dischargepipe is not connected to a drain or other suitable means, the water flow may causeproperty damage.
The DischargePipe:
Must not be smaller in size than the outlet pipe size of
the valve, or have any reducing couplings or other restriction.
Must not be pluggedor blocked.
Must be of material listedfor hot water distribution.
Must be installed so as to allow complete drainage of both the
Must terminate at an adequatedrain.
Must not have any valve between the relief valve and tank.
T&P RELIEF |
|
VALVE PROBE | TEMPERATURE- |
| PRESSURE |
| RELIEF VALVE |
T&P
SHANK
NIPPLE'LENGTH
•if a shorl shank (less than 2")
•Ffa longshank (2'or longer)is to be installed,do not use1henippleand coupling¸
For_le operatK,n ofIhewaterheater¸theReEf Vave mustnotbe removedorplugged¸f S_BrP_nL_I_leading. "TemperatUfe. p[assureRelief Valve"for insta_al_Onand mai_lenaflceof Relie
Va)ve,diSChargeppe andothersafetyprecautions¸