Gas Piping - Maytag Nine HN4930T User Manual

Instructions for Installation (cont'd)
Gas Piping
All vent gases must be completely vented to the outdoors of
AWARNING
the structure (dwelling). Install only the draft hood provided Make sure the gas supplied is the same type listed
with the new water heater and no other draft hood.
on the model rating plate. The inlet gas pressure
Vent pipes must be secured at each joint with sheet metal must not exceed 10.5 in, water column (2.6kPa) for
screws, natural gas or 13 in. water column (3.2kPa) for
propane (L.R) gas. The minimum inlet gas pressure
listed on the model rating plate is for the purpose
-- "------_- TO of input adjustment.
i CilMNEY "WARNING [
If thegas control valve is subjected to pressures
r _ exceeding '/1 pound per square inch (3.5kPa), the I
VENT PIPEINSTALLATION damage to the gas control valve could result in a
f re or explos on from leak ng gas.
There must be a minimum of 6" clearance between singlewall vent
pipe and any combustible material. Fill and seal any clearance
AWARNING
between single wallvent pipe and combustible materialwith mortar If the main gas line shutoff serving all gas appli- [
ances is used, also turn "off" the gas at each appli-
mix, cement, or other noncombustible substance.For other than sin- ance. Leave all gas appliances shut off until the
gle wall, foliowvent pipe manufacturer'sclearance specifications.To
water heater installation is complete.
insure a tight fit of the vent pipe in a brick chimney, seal around the
vent pipe with mortar mix cement. 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
[ concerning pipe
AWARNING size.
Failure to have required clearances between vent l
piping and combustible material will result in a fire ]
There must be:
hazard. I
• A readily accessible manual shut offvalve in the gas supply
line serving the water heater, and
AWARNING [
• A drip leg (sediment trap) ahead of the gas control valve to
Be sure vent pipe is properly connected to prevent I
help prevent dirt and foreign materials from entering the gas
I
escape of danc_erous flue gases which could cause
control valve.
deadly asphyxiation. • 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
_kWARNING
Chemical vapor corrosion of the flue and vent
sys- /
water heater. Use a soapy water solution, not a match or open
tern may occur if air for combustion contains certain /
chemical vapors. Spray can propellants, cleaning sol-[
flame. Rinse off soapy solution and wipe dry.
vents, refrigerator and air conditioner refrigerants, /
swimming pool chemicals, calcium and sodium chlo-[ Standard Models are for installation up to 3,300 feet above
ride, waxes, bleach, and process chemicals are typi-|
cal compounds which are potentially corrosive. / sealevel
HighAltitude 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 alti-
tude model 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 gas utility for further information.
The appliance AWARNING I and its gas connection must be leak
testedbefore placing the appliance in operation.
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