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INSUFFICIENT COMBUSTION AIR
SUPPLY may result in the production and
release of deadly carbon monoxide (CO) into the
home which can cause severe personal injury or
death.
IMPROPER VENTING may result in
property damage and the release of flue
gases which contain deadly carbon monoxide (CO)
into the home, which can cause severe personal
injury, death or substantial property damage.
The vent system shall be designed and
constructed in accordance with NFPA 54 and
applicable local codes to develop a positive flow
adequate to convey flue or vent gases to the
outdoors, while ensuring that flue gases do not
cool prematurely.
Observe all general venting guidelines provided in
Appendix B—Venting. Additionally:
This appliance shall be vented into a listed
1.
gas vent, masonry, metal, or factory-
built chimney as required by NFPA 54
and applicable local codes for Category I
appliances. If venting this appliance into
a masonry chimney, the chimney must be
lined with a listed chimney lining system
4-a
8
3. PROVIDE COMBUSTION AIR
4. CONNECT VENTING
DAMPER MUST BE OPEN when the main burner is firing.
Like all fuel-burning appliances, boilers need air to
operate reliably and safely.
Provide combustion air using the instructions in
Appendix A—Combustion Air.
(i.e. Type B gas vent or flexible metal) as
required by NFPA 54 and applicable local
codes. Clay flue lined masonry chimneys do
not meet the venting requirements for this
appliance.
Attach the vent damper with three
2.
sheetmetal screws around the perimeter of
the flue collar (Figure 4-a), oriented so that
the position indicator is visible. The vent
damper may also be mounted anywhere
between the flue outlet and the chimney
within reach of the electrical harness.
Vent connector shall be double-wall
3.
insulated gas vent as supplied with this
boiler or Type B (double-wall) gas vent only.
Using sheetmetal screws, attach the vent
connector between the vent damper and
the vertical chimney (Figure 4-b). Do not
exceed the maximum vent connector length
in Table 4.1.
4-b
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