Bradford White 55X-80B-3X - Manual (Page 15)

15
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 one (1.0)
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 fourteen (14.0) 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 three (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).
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.
WARNING
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.
CAUTION
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 1/2 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 1/2 psi (3.5 kPa). The
supply line must be capped when not connected to the water heater.
WARNING
The gas inlet pressure to the gas control must never exceed 14 inches of water
column (1/2 psi). 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 1/2 psi or less. Failure to do so may result in serious injury or
death.