Burnham 8HE Series Installation, Operating And Service Instructions page 25

5
Venting
(continued)
4. Secure bracket in position by tightening #10
sheet metal screw against outer surface of
Draft Hood skirt.
5. Insert excess power cord through Jacket Right
Side Panel hole. Remove slack.
6. Position strain relief bushing around power
cord. Pinch bushing's two halves together and
snap back into hole in Jacket Right Side Panel.
7. Verify power cord, mounting bracket, and
Blocked Vent Switch are secure and located as
shown in Figure 5-1.
!
WARNING
• Do not operate boiler without Blocked Vent
Switch Properly installed.
• Do not use one vent damper to control two or
more heating appliances.
F. Install Vent Damper. See Figure 5-2.
1. Open Vent Damper Carton and remove
Installation Instructions. Read Installation
Instructions thoroughly before proceeding.
2. Vent damper must be same size as draft hood
outlet. See Figure 1-1. 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.
111828-01 - 1/23
Figure 5-2: Vent Damper Installation
8HE Installation, Operating & Service Instructions
!
WARNING
Provide adequate clearance for servicing -
provide 6 in. minimum clearance between
damper and combustible construction.
G. Install Vent Connector from draft hood or vent
damper to chimney. See Figure 5-3.
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.
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