Kenmore 153.337001 Owner's Manual page 16

Installation Instructions (cont'd)
Gas Piping (cont'd)
CORRECT GAS PIPE SIZE FOR
WATER HEATERS OPERATING ON NATURAL GAS
Based on InletGasPressures of 0.5 psigor Lessand
a Pressure Drop of 0.3 inchesWater Column.
(Based bn a 0.60SpecificGravityGas)
TOTAL INPUT* DISTANCE TO METER, IN FEET
BTU/HR 20 30 60 90 125 150 200
75,000 '/2 3/4 3/4 3/4 I I I
100,000
%
3/4 3/4 I I I I
150,000 314 314 I I I'14 174 I%
*OlC all gas appliances in line.
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 NFPA 54 and the gas company con-
cerning pipe size.
There must be:
• A readily accessible manual shut off valve in the gas supply line
serving the water heater, and
• A drip le{{(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
shutoffvalve 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 offsoapy solution and wipe dry.
Standard Models are for installation up to 3,300 feet above sea
level.
High Altitude Models are for installation from 3,300 to 5,500 feet
above sea level.
Ifa standard model is installed above 3,300 feet or a high altitude
models is installed above 5,500 feet, the input rating 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.
_,WARNING I
The applianceand its gas connection must be leak tested
beforep ac ng the app ancein operation.
_,WARNING
• The appliance and its individual shutoff valve must be discon-
nected from the gas supply piping system during any pressure
testing of the gas system at test pressures in excess of ½
pound per square inch (3.5kPa).
• The appliance must be isolated from the gassupply piping sys-
tem by closing its individual manual shutoff valve during any
pressure testing of the gas supply piping system at test pres-
suresequal or lessthan ½ pound per square inch (3.5kPa).
_,WARNING l
Use pipe joint compound or teflon tape marked as being I
resistantto the actionof potro eum [Propane(I-R)] gases. I
16
GAS PIPING WITH
FLEXIBLE CONNECTOR
GAS SUPPLY PIPING
MANUAL _
SHUTOFF
VALVE
FLEXIBLEGAS CONNECTOR
LABELEDAS COMPLYING
WITH ANSI STANDARDS
GROUND JOINT _
,&_ LOOP _
UNION (Optional) _ N _
_' _ CONTROL
T VALVE
3-_IN,_ _LEGtFap) _.I
GAS PIPING WITH _,LL BLACK IRON
PIPE TO GAS CONTROL
MANUAL _GAS SUPPLY PIPING
SHUTOFF
VALVE
BLACK PIPE
GROUND
3" MIN. DRIP LEG
(Sediment trap)
GAS
CONTROL
VALVE
AWARNING
Contaminants in the gas lines may cause improper operation
of the gas control valve that may result in fire or explosion.
Before attaching the gas line be sure that all gas pipe is clean
on the inside. To trap any dirt or foreign material in the gas
supply line, a drip leg (sometimes called a sediment trap)
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.