Gas Connections - Bradford White DS140S Installation And Operating Instruction Manual

GAS CONNECTIONS

The gas supply lines must meet all requirements of the National Fuel Gas
Code, ANSI Z223.1 - (Latest Edition) and/or in Canada, CAN/CGA B149
Installation Codes - (Latest Editions).
The minimum permissible gas supply pressure for the purpose of input
adjustment is one (1.0) inch (.25kPa) water column above the operating
manifold pressure. See the rating plate and combination gas control for the
manifold pressure and gas type. The maximum permissible gas supply
pressure is fourteen (14.0) inches (3.5kPa) 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 1/2 inch black iron
pipe. (Dirt and scale from the pipe can enter the combination control and
cause it to malfunction). The inlet gas line must have a drip leg (sediment
trap) installed as close as possible to the water heater's combination gas
control having a minimum length of three (3) inches (7.6 cm). A ground
joint union must be installed 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.
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!
The water heater and its 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.
CAUTION
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