Connections
26
Gas Piping
Before connecting gas boiler to gas line,
install main gas shut-off valve, union,
and capped drip leg (see Fig. 11 below).
Size gas supply piping to boiler
according to local utility requirements.
Identify the main shut-off valve as such
with a tag and f amiliarize owner of
boiler with this valve.
Support piping by proper suspension
method. Piping must not rest on or be
supported by boiler.
Testing Gas Pipe
The boiler and its individual shut-off
valve must be disconnected from the
gas supply piping system during any
pressure testing of that system at
pressures in excess of 0.5 psig (3.5
kPa).
The boiler must be isolated from the
gas supply piping system by closing its
individual manual shut-off valve during
any pressure testing of the gas supply
piping system at a test pressure equal
to or less than 0.5 psig (3.5 kPa).
Gas manifold has been factory-tested.
Leak test must be repeated during initial
trial operation of burner by mechanical
contractor.
5167 450 v1.4
C
F
Ground joint
union
Approved manual
gas shut-off valve
Sediment
trap
Min. gas supply pressure
4.5 “w.c. for natural gas
12 “w.c. for L.P. gas
Fig. 11
Never check for gas leaks with an
open flame. Us e approved s pray liquid
or soap water solution for bubble
test.
CAUTION
Maximum gas supply pressure is
14“w.c./0.5psig.Boilermustbe
disconnected from gas piping for
piping pressure tests above 14 “w.c.
/0.5psig.
WARNING
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