Sears 153.33535 - Manual (Page 11)

Installing the New Water Heater (cont'd)
Temperature-Pressure Relief Valve
- WARNING -
At the time of manufacture this water heater was provided
with a combination temperature-pressures relief valve certi-
and Automatic Gas Shutoff Devices for Hot Water Supply
Systems, 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 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 3415
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 locally
prescribed temperature-pressure relief valve installed in the
designated opening in the water heater in place of the facto­
ry 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 mstalled
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 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 15 feet, or use of more
than two elbows can cause restriction and reduce the
discharge capacity of the valve.
\
No valve or other obstruction is to be placed between the
reliCT valve and the tank. Do not connect tubing directly to
^harge drain unless a 6" air gap is provided. To prevent
Dodily injury, hazard to life, or property damage, the relief
!fik
allowed to disctiarge water in quantities
snouid circumstances demand. If the discharge pipe is not
connected to a drain or other suitable means, the water flow
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 otner restriction.
■ -Must not be plugged or blocked.
“^ust be of material listed for hot water distribution.
—Must be installed so as to allow complete drainage of both
^^^p^‘®Mperature-pressure relief valve, and the discharge
U! -----------......It „I g,, аисчиснс urdlll.
relief valve and tank.
-Zxl“!! *®™"’3te at an adequate drain,
■^ust not have any valve between the
WARNING
The temperature-pressure relief valve must be manual­
ly operated 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 temperature-pressure relief valve dis­
charge line, and (2) the water manually discharged 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 com­
pletely reset and continues to release water, immedi­
ately close the cold water Inlet to the water heater, fol­
low the draining instructions, and replace the tempera­
ture-pressure relief valve with a new one.
SHUTOFF COLD
VALVE
TEMPERATURE-PRESSURE
RELIEF VALVE
DISCHARGE PIPE
(Do not cap or plug)
6" AIR GAP
11
RELIEF VALVE OPENING
AT THE TIME OF MANUFACTURE, THIS WATER HEATER WAS PROVIDED
WITH A COMBINATION TEMPERATURE-PRESSURE RELIEF VALVE LISTED
AS COMPLYING WITH THE STANDARD FOR RELIEF VALVES AND AUTO­
MATIC GAS SHUTOFF DEVICES FOR HOT WATER SUPPLY SYSTEMS,
ANSI 221.22. FOR SAFE OPERATION OF THE WATER HEATER, THE
RELIEF VALVE MUST NOT BE REMOVED FROM ITS DESIGNATED POINT
OF INSTALUTION OR PLUGGED.
YOUR LOCAL JURISDICTIONAL AUTHORITY, WHILE MANDATING THE USE
OF A TEMPERATURE-PRESSURE RELIEF VALVE COMPLYING WITH ANSI
221.22 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
LOCALLY
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.