Sears 153.33535 - Manual (Page 13)

Installing the New Water Heater (cont'd)
Gas Piping
WARNING-
Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed 14
inches water column ['A pound per square inch (3.5kPa)].
The minimum inlet gas pressure listed on the model rating
plate is for the purpose of input adjustment.
-WARNING
If the gas control valve is subjected to pressures exceeding 'A
pouna per square inch (3.5kPa), the damage to the gas con­
trol valve could result in a fire or explosion from leaking gas.
■ WARNING
If the main gas line shutoff serving all gas appliances is used,
also turn "OFF" the gas at each appliance. Leave all gas appli­
ances shut off until the water heater installation is complete.
A gas line of sufficient size must be run to the water
heater. Consult the latest edition of National Fuel Gas
Code ANSI Z223.1, also referred to as NFPA54 and the
gas company concerning pipe size.
There must be:
-A readily accessible manual shut off valve in the gas sup­
ply line serving the water heater, and
-A drip leg (sediment trap) ahead of the gas control valve
to help prevent dirt and foreign materials from entering
the gas control valve.
-A flexible gas connector or a ground joint union between
the shutoff valve and control valve to permit servicing of
the unit.
Be sure to check all the gas piping for leaks before lighting
the water heater. Use a soapy water solution, not a match
or open flame. Rinse off soapy solution and wipe dry.
Standard Models are for installation up to 3,300 feet
alMve sea level.
High Altitude Models are for installation from 3,300 to
5,500 feet above sea level.
If a standard model is installed above 3,300 feet or a high
altitude model is installed above 5,500 feet, the input rat­
ing must be reduced at the rate of 4 percent for each
1,000 feet above sea level. Contact your local Sears
Service Center or gas utility for further information.
The
ed
-WARNING
2 appliance and its gas connection must be leak test-
before placing the appliance in operation.
-WARNING
appliance and its individual shutoff valve must be discon-
J№cted from the gas supply piping system during any pressure
resting of that system at test pressures in excess of
'A pound
^•■square inch (3.5kPa).
isolated from the gas supply piping sys-
m by closing its individual manual shutoff valve during any
P ^ure testing of the gas supply piping system at test pres-
t^es equal to or less than 'A pound per square inch (3.5kPa).
-WARNING-
Use pipe joint compound or teflon tape marked as being
resistant to the action of petroleum [Propane (L.P.)] gases.
SEDIMENT TRAP
A sediment trap shall be installed as close to the inlet of
the water heater as practical at the time of water heater
installation. The sediment trap shall be either a tee fitting
with a capped nipple in the bottom outlet or other device
recognized as an effective sediment trap. If a tee fitting is
used, it shall be installed in conformance with one of the
methods of installation shown below.
Connecting the gas piping to the gas control valve of the water
heater can be accomplished by either of the two methods shown.
GAS PIPING WITH FLEXIBLE CONNECTOR
[ gas SUPPLY PIPING
MANUAL
SHUTOFF
VALVE
FLEXIBLE GAS CONNECTOR
LABELED AS COMPLYING
GAS
J CONTROL
VALVE
GAS PIPING WITH ALL BLACK IRON PIPE
TO GAS CONTROL
: a S SUPPLY PIPING
GROUND JOINT
UNION
-WARNING-
Contaminants in the gas lines may cause improper operation
of the gas control valve that may result in nre or explosion.
Before attachii^ the gas line be sure that all gas pipe is clean
■ ‘ ■ ‘ i. To ■ ■ ...............................
jp)
must be incorporated in the piping. The drip leg must be
readily accessible. Install in accordance with the "Gas
Piping" section. Refer to the latest edition of the National
Fuel Gas Code, ANSI Z223.1, also referred to as NFPA 54.
on the inside. To trap any dirt or foreig^n malerial'in the gas
supply line, a drip leg (sometimes caned a sediment traj))
St be ii ....................................
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