Chimney And Vent Pipe Connection; Chimney Sizing - ECR Dunkirk PWB Series Manual

For boilers for connection to gas vents or chimneys, vent installations shall be in
accordance with "Venting of Equipment", of the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, or applicable provisions of local building codes.
CHECK YOUR CHIMNEY
This is a very important part of your heating system. It
must be clean, the right size, properly constructed and
in GOOD CONDITION. No boiler can function properly
with a bad chimney.

CHIMNEY SIZING

Install vent in accordance with "Venting of Equipment"
of the National Fuel Gas Code, ANSI Z223.1/NFPA 54,
or applicable provisions of local building codes.
CONNECTING THE VENT DAMPER AND VENT
CONNECTOR
Refer to fi gure on page 2 for size and location of vent
(fl ue opening).
IMPORTANT - The damper blade on the
furnished vent damper has a 1/2 square inch hole
(approximately 3/4" diameter). On boilers equipped
with standing pilot, the hole must be left open. On
boilers equipped with intermittent ignition, the hole
should be plugged by using the plug supplied with
the vent damper.
Position furnished vent damper on top of fl ue
1.
outlet collar. Fasten damper securely to fl ue
outlet collar with sheet metal screws. Make sure
damper blade has clearance to operate inside of
diverter. Do not modify either draft diverter or
vent damper during installation.
On 2 section boilers equipped with vent damper,
supplied 4-inch vent damper is equipped with
3-inch to 4-inch adapter so that 4-inch vent
damper may be installed on boiler's 3-inch fl ue
outlet collar. Fasten all fi ttings securely.
As An Option
Damper may be installed in any horizontal or ver-
tical position, closer to fl ue outlet collar preferred.
Follow diagrams - Figures #9, #10 and #11.
Install vent damper to service only single boiler
2.
for which it is intended. Damper position indicator
shall be in visible location following installation.
Locate damper so that it is accessible for
servicing.
Damper must be in open position when appliance
3.
main burners are operating.
Boiler is equipped with factory wired harness that
4.
plugs into vent damper.
Vent pipe must be same size as the fl ue outlet
5.
collar, except 2 section boilers with vent damper
as noted above.
Slope pipe up from boiler to chimney not less
6.
than 1/4" per foot.

CHIMNEY AND VENT PIPE CONNECTION

7.
8.
9.
Sections of vent pipe should be fastened with sheet
metal screws to make piping rigid. Support horizon-
tal potions of vent system to prevent sagging. Use
stovepipe wires every 5' to support pipe from above.
If vent pipe must go through crawl space, double wall
vent pipe should be used. Where vent pipe passes
through combustible wall or partition, use ventilated
metal thimble. Thimble should be 4 inches larger in
diameter than vent pipe.
8
Run pipe as directly as possible with as few el-
bows as possible.
Do not connect to fi replace fl ue.
End of vent pipe must be fl ush with inside face
of chimney fl ue. Use a sealed-in thimble for the
chimney connection.