Installation Instructions (cont'd)
Temperature-Pressure Relief Valve
_,WARNING
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 Devices for
Hot Water Supply Systems, ANSI Z21.22 by a nationally recog- nized testing laboratory that maintains periodic inspection of _roduction of listed equipment or materials.
The valve must he marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 Ibs.lsq.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 furnishedwith 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
For safe operation of the water heater, the relief valve must not be removed from it'sdesignatedopening or plugged.
The
Position the valve downward and provide tubing sothat 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 dischargeopening must not be blocked or reduced in size under any circumstances. Excessive
length, ever 30 feet, or use of more than four elbows can cause restriction and reduce the dischargecapacity 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 unlessa 6" air gap is provided.To prevent bodily injury, haz. ard to life, or property damage, the relief valve must be allowed to dischargewater 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 haveany 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.
_,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 draining
instructions, and replace the
| ||
HOT | / | RELIEFVALVE |
DISCHARGE PIPE (Do not cap or plug)
PROVIDE A 6" AIR
GAP BETWEEN THE
END OF THE
DISCHARGE PIPE
AND DRAIN
RELIEFVALVE OPENING
At the time of manufacture, this water heater was provided with a combination tern-
Your local jurisdictional authorlty, while mandating the use of a
Compliance with such local requirements must be satisfied by the installer or end user of the water heater with a locally prescribed
See manual heading
13