Bradford White D-4-504S6FSX - Manual (Page 17)

17
Gas Connections
The gas supply lines must meet all requirements of the National Fuel Gas
Code, ANSI Z223.1-Latest Edition, or in Canada, the Natural Gas Installation
Code, CAN/CGA B149.1-Latest Edition, or Propane Installation Code,
CAN/CGA B149.2-Latest Edition.
The minimum permissible gas supply pressure for the purpose of input
adjustment is 1 in. (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 in. (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. Therefore, the
inlet gas line must have a minimum length of 3 in. (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 a 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).
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.
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.