Gas Piping - Maytag Performa HJ640NBDVT User Manual

Instructions for Installation (cont'd)
Gas Piping
_WARNING ll, WARNING
Make sure the gas supplied is the same type listed • The appliance and its individual shutoff valve
on the model rating plate. The inlet gas pressure must be disconnected from the gas supply piping
must not exceed 10.5 in. water column (2.6 kPa) for system during any pressure testing of the gas sys-
natural gas or 13 in. water column (3.2 kPa) for tern at test pressures in excess of 1/2 pound per
Propane (L.R) gas. The minimum inlet gas pressure square inch (3.SkPa).
listed on the model rating plate is for the purpose • The appliance must be isolated from the gas sup-
of input adjustment, ply piping system by closing its individual manual
shutoff valve during any pressure testing of the
I AWARNING I
gas supply piping system at test pressures equal
or less than 1/2 pound per square inch (3.5kPa).
If thegas control valve is subjected to pressures I
I
exceeding 1/zpound per square inch (3.5kPa), the I
damage to the gas control valve could result in a I
fire or expIosion_rom leaking gas. I
&WARNING I
AWARNING
Use pipe joint compound or teflon tape marked as [
being resistant to the action of petroleum [Propane I
If the maingas line shutoff serving all gas appli- (L.R)]gases. ]
ances is used, also turn nOFF" the gas at each appli-
ance. Leave all gas appliances shut off until the
water heater installation is complete. SEDIMENT TRAP
A gas line of sufficient size must be run to the water heater. A sediment trap shall be installed as close to the inlet of the
Consult the latest edition of National Fuel Gas Code ANSI water heater as practical at the time of water heater installa-
Z223.1, also referred to as NFPA 54 and the gas company tion. The sediment trap shall be either a tee fitting with a
concerning pipe size. capped nipple in the bottom outlet or other device recognized
as an effective sediment trap. Ira tee fitting is used, it shall be
There must be: installed in conformance with one of the methods of installa-
• A readily accessible manual shut offvalve in the gas supply tion shown below.
line serving the water heater, and
• A drip leg (sediment trap) ahead of the gas control valve to Connecting the gas piping to the gas control valve of the
help prevent dirt and foreign materials from entering the water heater can be accomplished by either of the two meth-
gas control valve, ods shown.
• A flexible gas connector or a ground "jointunion between the
shutoffvalve and control valve to permit servicing of the unit.
[ -W.R.,.G 1
Be sure to check all the gas piping for leaks before lighting the
I
Contaminant's in the gas line may cause
improperI
water heater. Use a soapy water solution, not a match or open
| operation of the gas control valve that may result |
flame. Rinse offsoapy solution and wipe dry. [ in fire or explosion. Before attaching the gas line 1
/be
sure that all gas pipe is clean on the inside. To/
trap any dirt or foreign material in the gas supply
Standard Models are for installation up to 3,300 feet above line, a drip leg (sometimes called a sediment trap)
sealevel, must be incorp.orated in the piping. The drip leg
HighAltitude Models arefor installation from 3,300 to must be readdy accessible. Install in accordance
with the "Gas Piping" section. Refer to the latest
5,500 feet above sea level,
edition of the National Fuel Gas Code, ANSI Z223.1,
Ira standard model is installed above 3,300 feet or a high alti-
also referred to as NFPA 54.
rode model is installed above 5,500 feet, the input rating must
be reduced at the rate o{4 percent for each 1,000 feet above
sea level. Contact your local gas utility for fi_rther information.
&WARNING ]
The appliance and its gas connection must be leak
testedbefore placing the appliance in operation. I
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