28
e gas pipe to your boiler must be the correct size for the
length of run and for the total Btu per hour input of all gas uti-
lization equipment connected to it. See Table #3 for the proper
size (next page). Be sure your gas line complies with local
codes and gas company requirements.
e boiler and its individual shuto valve must be disconnect-
ed from the gas supply piping
Attach combustion air intake piping to supplied Fernco
1.
2” coupling on mixer. Attach vent piping to furnished 2”
CPVC vent tee on dra inducer outlet.
NOTE: All pipe joints are to be water tight.
Working from the boiler to the outside, cut pipe to re-
2.
quired length(s).
Deburr inside and outside of pipe.
3.
Chamfer outside edge of pipe for better distribution of
4.
primer and cement.
Clean and dry all surfaces to be joined.
5.
Check dry t of pipe and mark insertion depth on pipe.
6.
NOTE: It is recommended that all pipes be cut, prepared,
and pre-assembled before permanently cementing any joint.
Aer pipes have been cut and pre-assembled, apply ce-
7.
ment primer to pipe tting socket and end of pipe to
insertion mark. Quickly apply approved cement to end
of pipe and tting socket (over primer). Apply cement
in light, uniform coat on the inside of socket to prevent
buildup of excess cement. Apply second coat.
While cement is still wet, insert pipe into socket with ¼
8.
turn twist. Be sure pipe is fully inserted into tting socket.
Wipe excess cement from joint. A continuous bead of ce-
9.
ment will be visible around perimeter of a properly made
joint.
Handle pipe joint carefully until cement sets.
10.
Support combustion air and vent piping a minimum of
11.
every 5 feet using pre-formed metal hanging straps. Do
not rigidly support pipes. Allow movement due to expan-
sion and contraction.
Slope combustion air and vent pipes toward boiler a mini-
12.
mum of ¼” per linear foot with no sags between hangers.
Use appropriate methods to seal openings where vent and
13.
combustion air pipes pass through roof or side wall.
system during any pressure testing of that system at test pres-
sures in excess of ½ psig (3.5kpa).
e boiler must be isolated from the gas supply piping system
by closing its individual manual shuto valve during any pres-
sure testing of the gas supply piping system at test pressures
equal to or less than ½ psig (3.50ka).
NATURAL GAS PROPANE GAS
MAXIMUM GAS SUPPLY PRESSURE 10” w.c. 14” w.c.
MINIMUM GAS SUPPLY PRESSURE 4” w.c. 10” w.c.
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