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Installation Instructions (cont'd)
Gas Piping (cont'd)
,&WARNING
The appliance and its individual shutoff valve must
be disconnected from the gas supply piping sys-
tem during any pressure testing of the gas system
at test pressures in excess of I/2 pound per square
inch (3.5kPa).
The appliance must be isolated from the gas sup-
ply piping system by closing its individual manual
shutoff valve during any pressure testing of the gas
supply piping system at test pressures equal or
less than I/2 pound per square inch (3.5kPa).
_,WARNING I
Use pipe joint compound or teflon tape marked as I
being resistant to the action of petroleum [Propane
(L.R)] gases.
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
g. u"Uo
VALVE _
GROUND
UNION
(OPTIONAL)
FLEXIBLE GAS CONNECTOR
LABELED AS COMPLYING
WITH ANSI STANDARDS
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 he 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.
DRIP LEG
(SEDIMENT GAS
3" MIN. TRAP) ....._ _ _, CONTROL
VALVE
1CAP
_,WARNING
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 current edition of the
National Fuel Gas Code, ANSI Z223.1, also referred
to as NFPA 54.
GAS PIPING WITH ALL BLACK IRON PIPE
TO GAS CONTROL
GAS SUPPLY PIPING
gH gTUo h
VALVE _
GROUND
JOINT UNION
3"MIN.
BLACK PIPE
DRIPLEG _ GAS
($EDIMENTIL_ _J _" .1 CONTROL
TRAP) VALVE
ICAP
24