Installing the New Water Heater (cont’d)
A gas line of sufficient size must be run to the water heater. Consult the current edition of National Fuel Gas Code ANSI Z223.1, also referred to as NFPA 54 and the gas company concerning pipe size.
There must be:
—A readily accessible manual 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 shutoff valve 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 off soapy solution and wipe dry.
When installed at elevations above 2,000 feet, input ratings should be reduced at the rate of 4 percent for each 1,000 feet above sea level. Installations above 4,000 ft. require replace- ment of the burner orifice in accordance with the National Fuel Gas Code ANSI Z223.1 / NFPA 54.
WARNING
Failure to replace the orifice could result in improper and inefficient operation of the appliance, producing carbon monoxide gas in excess of safe limits, which could result in serious injury or death. Contact your gas supplier for any specific changes which may be required in your area.
WARNING
The appliance and its individual shutoff valve must be dis- connected from the gas supply piping system during any pres- sure testing of that system at test pressures in excess of 1/2 pound per square inch (3.5kPa).
The appliance must be isolated from the gas supply piping sys- tem by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pres- sures equal to or less than 1/2 pound per square inch (3.5kPa).
WARNING
The appliance and its gas connection must be leak tested before placing the appliance in operation.
WARNING
Use pipe joint compound or teflon tape marked as being resis- tant to the action of petroleum [Propane (L.P.)] gases.
SEDIMENT TRAP
A sediment trap shall be installed as close to the inlet of the water heater as practical at the time or water heater instal- lation. The sediment trap shall be either a tee fitting with a capped nipple in the bottom outlet or other device recog- nized as an effective sediment trap. If a tee fitting is used, it shall be installed in conformance with one of the methods of installation shown.
Connecting the gas piping to the gas control valve of the water heater can be accomplished by either of the two methods shown.
WARNING
Contaminant’s 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 (some- times 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 FLEXIBLE CONNECTOR
GAS SUPPLY PIPING
MANUAL
SHUTOFF
VALVE
FLEXIBLE GAS CONNECTOR
LABELED AS COMPLYING
WITH ANSI STANDARDS
GROUND JOINT
UNION (OPTIONAL)
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| DRIP LEG |
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| GAS | |
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| (SEDIMENT | |
3″ MIN. |
| CONTROL | ||
| TRAP) | |||
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| CAP | VALVE |
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GAS PIPING WITH ALL BLACK IRON PIPE
TO GAS CONTROL
GAS SUPPLY PIPING
MANUAL
SHUTOFF
VALVE
GROUND JOINT
UNION
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| BLACK PIPE |
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| DRIP LEG | GAS |
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| 3″ MIN. |
| (SEDIMENT | ||
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| CONTROL | |||
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| TRAP) | VALVE |
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| CAP |
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