34
E. Boiler Equipped With Vent Damper. See Figure 28.
1. Open Vent Damper Carton and remove Installation
Instructions. Read Installation Instructions
thoroughly before proceeding.
Figure 28: Vent Damper Installation
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
modification to either (Refer to instructions packed
with vent damper for specific instructions). Vent
damper position indicator to be visible to users.
F. Install Vent Connector from draft hood or vent damper
to chimney. See Figure 29. For modular or multiple
boiler installations, review "Multiple-Modular Manual
for Series 8B Gas Boilers", P/N 8141615.
1. Do not connect into same leg of chimney serving an
open fireplace.
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 flush with inside of
flue 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.
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