American Water Heater vG6250t76nv User Manual

17

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/NFPA 54) and your gas supplier concerning pipe size.
There must be:

•  A readily accessible manual shuttoff valve in the gas supply line

serving the water heater, and

•  A drip leg (sediment trap) ahead of 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 shuttoff

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.

Use pipe joint compound or teflon tape marked as being resistant

to the action of petroleum [Propane (L.P.)] gases.

The appliance and its gas connection must be leak tested before 

placing the appliance in operation.

The appliance and its individual Shuttoff valve should be disconnected 

from the gas supply piping system during any pressure testing of that 

system at test pressures in excess of 1/2 pound per square inch (3.5 kPa).

It should be isolated from the gas supply piping system by closing its 

individual manual Shuttoff valve during any pressure testing of the gas 

supply piping system at test pressures equal to or less than 1/2 pound 

per square inch (3.5 kPa).
Connecting gas piping to the gas control valve of water heater can be 

accomplished by either of two methods shown in Figures 12 and 13.

A sediment trap should be installed as close to the inlet of the 

water heater as practical at the time of water heater installation. 

The sediment trap should be either a tee fitting with a capped 

nipple  in  the  bottom  outlet  or  other  device  recognized  as  an 

effective  sediment  trap.  If  a  tee  fitting    is  used,  it  should  be 

installed in conformance with one of the methods of installation 

shown in Figures 12 and 13. 

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/NFPA 54).