Gas Connections - Bradford White RG250H6N-475 Manual

Gas Connections

The gas supply lines must meet all requirements of the National Fuel Gas Code (ANSI Z223.1-
Latest Edition), or in Canada CAN/CGA B149.1 Natural Gas Installation Code (Latest Edition) or
CAN/CGA B149.2 Propane Installation Code (Latest Edition).
The minimum permissible gas supply pressure for the purpose of input adjustment is 1 inch (0.25
kPa) water column above the operating manifold pressure. See the rating plate and gas valve for
the manifold pressure and gas type. The maximum permissible gas supply pressure is 14 inches
(3.5 kPa) water column for natural gas and liquefied petroleum gases/propane gas.
1. Connect this water heater only to the type of gas (Natural or Propane gas) as shown on
the rating plate. Use clean black iron pipe or equivalent material approved by local
codes and ordinances. (Dirt and scale from the pipe can enter the gas valve and cause
it to malfunction). The inlet gas line must have a minimum length of 3 inches (7.6 cm)
drip leg (sediment trap) installed as close to the water heater's gas valve as possible.
A ground joint union must be installed as close to the water heater as possible in the
gas supply line feeding the water heater to permit servicing of the water heater.
Compounds used on the threaded joints of the gas piping must be resistant to the
action of liquefied petroleum gases/propane gas. DO NOT apply pipe dope to the gas
valve inlet and make certain that no pipe dope has become lodged in the inlet screen of
the gas valve. Extreme care must be taken to ensure no pipe dope enters the gas
valve. Avoid excessive torque when tightening the gas supply line to the gas valve.
Excessive torque may result in cracking of the gas valve housing and could create a
gas leak. When tightening gas supply line to L.P. control, it is recommended to hold
the inlet body of the control securely with an adequate wrench. The suggested
maximum torque is 31.5 ft. lbs. (4.4 kg-m).
The manufacturer of this water heater will not be liable for any damage or injury
caused as a result of a cracked gas inlet as a result of excessive torque.
2. This water heater and its gas connection must be leak tested before placing the water
heater in operation. Check for gas leaks with a soap and water solution and a brush or
a commercial leak detector fluid. NEVER USE A MATCH OR OPEN FLAME FOR
TESTING!
3. While checking for leaks care must be taken to prevent solution from
contacting the electrical connections at the control. If electrical connections at the
control become wet, they must be thoroughly dried before attempting to operate
the water heater.
The water heater and individual shutoff valve must be disconnected from the gas
supply piping system during any pressure testing of the system at test pressures in
excess of ½ psi (3.5 kPa). The water heater must be isolated from the gas supply
piping system by closing its manual shutoff valve during any pressure testing of the
gas supply system at test pressures equal to or less than ½ psi (3.5 kPa). The supply
line must be capped when not connected to the water heater.
The gas inlet pressure to the gas control must never exceed 14 inches of water column
(½ psi) (3.5 kPa). The gas supply system and any pressure regulating device in the
gas line must be specified, inspected and adjusted to assure a gas supply pressure of
½ psi (3.5 kPa) or less. Failure to do so may result in severe injury or death.
WARNING
CAUTION
WARNING
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