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E. Boiler Equipped With Vent Damper. See Figure 26.
1. Open Vent Damper Carton and remove Installation
Instructions. Read Installation Instructions
thoroughly before proceeding.
CAUTION
Do not use one vent damper to control two or
more heating appliances.
2. Vent damper must be same size as draft hood
outlet. See Figure 1. Unpack vent damper carefully.
Forcing vent damper open or closed may damage
gear train and void warranty. Vent damper assembly
includes pre-wired connection harness with
polarized plug.
3. Mount vent damper assembly on draft hood without
modication to either (Refer to instructions packed
with vent damper for specic instructions). Vent
damper position indicator to be visible to users.
WARNING
Provide adequate clearance for servicing -
provide 6” minimum clearance between damper
and combustible construction.
F. Install Vent Connector from draft hood or vent
damper to chimney. See Figure 27.
1. Do not connect into same leg of chimney serving an
open replace.
Figure 26: Vent Damper Installation
2. Where two or more appliances vent into a common
vent, the area of the common vent should at least
equal the area of the largest vent plus 50 % of the
area of the additional vents. Do not connect the
vent of this appliance into any portion of mechanical
draft system operating under positive pressure.
3. Vent connector should have the greatest possible
initial rise above the draft hood consistent with the
head room available and the required clearance from
adjacent combustible building structure.
4. Install vent connector above bottom of chimney to
prevent blockage - inspect chimney for obstructions
or restrictions and remove - clean chimney if
necessary.
5. Vent connector should slope upward from draft hood
to chimney not less than one inch in four feet. No
portion of vent connector should run downward or
have dips or sags. Vent connector must be securely
supported.
6. Use thimble where vent connector enters masonry
chimney - keep vent connector ush with inside of
ue liner.
7. Do not install Non-listed (AGA, CGA, CSA, ETL,
or UL) vent damper or other obstruction in vent
pipe.
8. Locate Boiler as close to Chimney as possible
consistent with necessary clearances. See Section I:
Pre-Installation.