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Installation
Instructions
(cont'd)
Venting (cont'd)
AWARNING
Chemical vapor corrosion of the flue and vent system
may occur if air for combustion containscertain chemlcai
vapors. Spray can propellants, cleaningsolvents, refrigera-
tor and air conditioner refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes bleach
and process chemicals are typical compounds which are
potenti=lly corrosive.
Gas Piping
AWARNING
Make sure the gassupplied is the same type listed on the
i model rating plate. The inlet gaspressuremust not exceed
14 incheswater column ½ poundper squareinch (3.5kPa).
iT he
minimum inlet gaspressurelistedon the model rating
j plate isfor the purposeof input adjustment.
_WARNING
If the gascontrolvalve issubjected to pressures exceeding ½I
pound per square inch(3.5klPa), t he damageto the gascon-
tro valvecouldresult n a fire or explosion from leaking ga_
AWARNING
If the main gasline shutoff servingall gasappliances is used,
alsoturn "OFF" the gasat eachappliance. L eaveall gasappli-
ancesshutoffuntil the water heater installationiscomplete.
&WARNING
The applianceand its gas connection must be leak tested
beforeplacing the appliance m operation.
&WARNING
• The appliance andits individual s hutoff valvemustbe discon-
nect_ from the gassupply piping system duringany pressure
testing of the gassystem at test pressures m excessof
per s q=r*inch (3.Skh).
•Tbe appliance mustbe isolated fromthe gassupply piping sys-
tem by dosingi_ individual m anualshutoff valveduring
pressure testingof the gassupply pipingsystemat test pres-
suresequalor lessthan '/2poundper square inch(].SkPa).
AWARNING
I
Use pipe joint compound or teflon tape marked as being J
Lresistantto the actionof petm eum let°pane (LR)] gases" ...J
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 _ NFPA54 and the gas company concern-
ing pipe size,
There must be:
I A readily accessiblemanual shut off valve in the gas supply 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
shutoffvalve and control valve to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting the
water beater. Use a soapy water solution, not a match or open
flame. Rinse offsoapy solution and wipe dry.
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 nip-
ple in the bottom outlet or other device recognized as an effec-
tive sediment trap. If a tee fitting is used, it shall be installed in
conformance with one of the methods of installation shown
below.
GAS PIPING
WITH
FLEXIBLE
CONNECTOR
_H,
GAS SUPPLYPIPING
MANUAL
SHUTOFF
VALVE
FLEXIBLEGAS CONNECTOR
LABELED AS COMPLYING
WITH
ANSI STANDING
GROUND
GAS
CONTROL
VALVE
AWARNING
Contaminants in the gasfinesmay causeimproper operation
of the gas controlvalvethat may resultin Ere or explosion.
Beforeattaching the gaslinebe sure that all gaspipeisclean
on the inside.To trap anydirt or foreignmaterial in the gas
supplyllne, a drip leg (sometimes called a sediment trap)
mu_ be incorporated in the piping.The drip leg must be
readilyaccessible. Installin accordancewith the "Gas Piping"
section.Refer to the latest editionof the Na_onal Fuel Gas
Cede, ANSI 7.223.1,also referredto asNFPA 54.
15
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