Reliance-water-heaters 606 User Manual download pdf (Page 11)

Temperature-Pressure Relief Valve

Installing the New Water Heater (cont’d)

TEMPERATURE-

PRESSURE RELIEF

VALVE

DISCHARGE PIPE

(Do not cap or plug)

PROVIDE A 6

″″

AIR

GAP BETWEEN THE

END OF THE

DISCHARGE PIPE

AND DRAIN

RELIEF VALVE OPENING

"THIS WATER HEATER IS PROVIDED WITH A COMBINATION TEMPERA-

TURE-PRESSURE RELIEF VALVE. FOR SAFE OPERATION OF THE WATER

HEATER, THE RELIEF VALVE(S) MUST NOT BE REMOVED FROM ITS DES-

IGNATED POINT OF INSTALLATION OR PLUGGED."

YOUR LOCAL JURISDICTIONAL AUTHORITY, WHILE MANDATING THE USE

OF A TEMPERATURE-PRESSURE RELIEF VALVE COMPLYING WITH ANSI

Z21.22 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 LOCAL-

LY PRESCRIBED TEMPERATURE-PRESSURE RELIEF VALVE INSTALLED IN

THE DESIGNATED OPENING IN THE WATER HEATER.

SEE MANUAL HEADING—"TEMPERATURE-PRESSURE RELIEF VALVES"

FOR INSTALLATION AND MAINTENANCE OF RELIEF VALVE. DISCHARGE

LINE AND OTHER SAFETY PRECAUTIONS.

COLD

TEMPERED

WATER

OUTLET

HOT

WARNING

The temperature-pressure relief valve must be manually oper-

ated at least once a year. Caution should be taken to ensure

that (1) no one is in front of or around the outlet of the tem-

perature-pressure relief valve discharge line, and (2) the water

manually discharged will not cause any bodily injury or prop-

erty 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 instruc-

tions, and replace the temperature-pressure relief valve with

a new one.

WARNING

At the time of manufacture this water heater was provided

with a combination temperature-pressure relief valve certi-

fied by a nationally recognized testing laboratory that main-

tains periodic inspection of production of listed equipment

or materials, as meeting the requirements for Relief Valves

and Automatic Gas Shutoff Devices for Hot Water Supply

Systems, and the current 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 Relief Valves and

Automatic Gas Shutoff Devices for Hot Water Supply

Systems, ANSI Z21.22 by a nationally recognized 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 the

water heater (150 lbs./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

3412) equal BTU/Hr. rate.

Your local jurisdictional authority, while mandating the use

of a temperature-pressure relief valve complying with ANSI

Z21.22 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 local-

ly prescribed temperature-pressure relief valve installed in

the designated opening in the water heater in place of the

factory furnished valve.

For safe operation of the water heater, the relief valve must

not be removed from it’s designated opening or plugged.

The temperature-pressure relief valve must be installed

directly into the fitting of the water heater designated for

the relief valve. Position the valve downward and provide

tubing so that any discharge will exit only within 6 inches

above, or at any distance below the structural floor. Be cer-

tain 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 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

″″

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:

—Must not be smaller in size than the outlet pipe size of

the valve, or have any reducing couplings or other restric-

tion.

—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 temperature-pressure relief valve, and the discharge pipe.

—Must terminate at an adequate drain.

—Must not have any valve between the relief valve and tank.

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Reliance-water-heaters 606 User Manual Page 11

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