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GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual
Part number 550-100-026/0404
21
Gas piping
5
Connecting gas supply piping
1. Remove jacket front panel and refer to Figure 15 to
pipe gas to boiler.
a. Install ground joint union for servicing, when required.
b. Install manual shutoff valve in gas supply piping outside
boiler jacket when required by local codes or utility
requirements.
c. In Canada — When using manual main shutoff valve,
it must be identified by the installer.
2. Wall-mounted boilers
a. Refer to separate Ultra Boiler Wall-mounting
instructions.
b. Gas connection may enter from the bottom of boiler
as explained in the Wall-mounting instructions.
3. Support piping with hangers, not by boiler or its
accessories.
4. Purge all air from gas supply piping.
5. Before placing boiler in operation, check boiler and
its gas connection for leaks.
a. Close manual main shutoff valve during any pressure
testing at less than 13" w.c.
b. Disconnect boiler and gas valve from gas supply piping
during any pressure testing greater than 13" w.c.
Do not check for gas leaks with an open
flame — use bubble test. Failure to use
bubble test or check for gas leaks can cause
severe personal injury, death or substantial
property damage.
6. Use pipe dope compatible with propane gases. 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. (Exception: Ultra-80LP
is propane-ready.) You must install the
propane orifice if the boiler will be
connected to propane. See page 9. Failure
to comply could result in severe personal
injury, death or substantial property
damage.
Figure 15 Connect gas supply piping
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 gas line components.