GAS-FIRED WATER BOILER — Installation Manual — Multiple-boiler Systems

Gas piping

Connecting gas supply piping

1. Remove jacket front panel and refer to Figure 13 to

3. Support piping with hangers, not by boiler or its

pipe gas to boiler.

accessories.

a. Install ground joint union for servicing, when

4. Purge all air from gas supply piping.

required.

5. Before placing boiler in operation, check boiler and

b. Install manual shutoff valve in gas supply pip-

its gas connection for leaks.

ing outside boiler jacket when required by lo-

a. Close manual main shutoff valve during any

cal codes or utility requirements.

pressure testing at less than 13" w.c.

c. In Canada — When using manual main shut-

b. Disconnect boiler and gas valve from gas sup-

off valve, it must be identified by the installer.

ply piping during any pressure testing greater

2. Wall-mounted boilers

than 13" w.c.

a. Refer to separate Ultra Boiler Wall-mounting

 

Do not check for gas leaks with an open

 

instructions.

 

 

flame — use bubble test. Failure to use

b. Gas connection may enter from the bottom of

 

 

bubble test or check for gas leaks can cause

boiler as explained in the Wall-mounting in-

 

 

severe personal injury, death or

structions.

 

 

substantial property damage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6. Use pipe dope compatible with propane gases.

Figure 13 Connecting gas supply piping

Apply sparingly only to male threads of pipe joints

 

 

 

 

 

 

 

 

so that pipe dope does not block gas flow.

 

 

 

 

 

 

 

 

 

Failure to apply pipe dope as detailed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

above can result in severe personal injury,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

death or substantial property damage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DO NOT adjust or attempt to measure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

gas valve outlet pressure. The gas valve is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

factory-set for the correct outlet pressure.

 

 

 

 

 

 

 

 

 

This setting is suitable for natural gas and

 

 

 

 

 

 

 

 

 

propane, requiring no field adjustment.

 

 

 

 

 

 

 

 

 

Attempting to alter or measure the gas

 

 

 

 

 

 

 

 

 

valve outlet pressure could result in

 

 

 

 

 

 

 

 

 

damage to the valve, causing potential

 

 

 

 

 

 

 

 

 

severe personal injury, death or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

substantial property damage.

 

 

 

 

 

 

 

 

 

Ultra boilers are shipped ready to fire

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

natural gas ONLY. You must install the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

propane orifice if the boiler will be

 

 

 

 

 

 

 

 

 

connected to propane. Failure to comply

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

could result in severe personal injury, death

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

or substantial property damage.

 

 

 

 

 

 

 

 

 

Use two wrenches when tightening gas piping at boiler, using one wrench to prevent the boiler gas line connection from turning. Failure to support the boiler gas connection pipe to prevent it from turning could damage components.

14

Part number 550-101-232/0703

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Weil-McLain Boiler installation manual Gas piping, Connecting gas supply piping
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Boiler specifications

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