Lochinvar KNIGHT WH 55 - 399 - Manual (Page 48)

48
Installation & Operation Manual
7
Gas connections
Connecting gas supply piping
1. Remove the front access panel and refer to FIG. 7-1
to pipe gas to the boiler.
a. Install a field supplied sediment trap / drip leg
upstream of the boiler gas controls.
MANUAL SHUTOFF VALVE
(FIELD SUPPLIED)
UNION
DRIP LEG
GAS SUPPLY
Figure 7-1 Gas Supply Piping
2. Support piping with hangers, not by the boiler or its
accessories.
Do not check for gas leaks with an open
flame – use the bubble test. Failure to
use the bubble test or check for gas leaks
can cause severe personal injury, death, or
substantial property damage.
3. Purge all air from the gas supply piping.
4. Before placing the boiler in operation, check the boiler and
its gas connection for leaks.
a. Close manual main shutoff valve during any
pressure testing at less than 13 inches w.c.
b. Disconnect the boiler and gas valve from the gas
supply piping during any pressure testing greater
than 13 inches w.c.
The gas valve and blower will not support
the weight of the piping. Do not attempt
to support the weight of the piping with the
boiler or its accessories. Failure to comply
could result in severe personal injury, death,
or substantial property damage.
ƽ WARNING
ƽ WARNING
5. Use pipe sealing compound compatible with propane gases.
Apply sparingly only to male threads of the pipe joints so
that pipe dope does not block gas flow.