Burnham Series 2B - Manual (Page 9)


WARNING
Failure to properly install and use this Blocked
Vent Switch may result in property damage,
personal injury or loss of life.
12 . TO MEET FEDERALLY MANDATED
EFFICIENCIES, ThIS BOILER MUST BE
EQUIPPED WITh A vENT DAMPER.
OPEN ThE vENT DAMPER CARTON and remove
the Installation Instructions. READ ThE INSTALLA-
TION INSTRUCTIONS ThOROUGhLY before
proceeding.
The automatic gas control valve supplied on each Series
2™ boiler provides the redundancy referenced in the
vent damper Installation Instructions.
CAUTION
Do not use one vent damper to control two heating
appliances.
A. The vent damper should be the same size as the
outlet of the Draft hood. (See Figure 1) Unpack the
damper carefully - DO NOT FORCE IT CLOSED!
Forcing the damper may damage the gear train and
void the warranty. The damper assembly includes a
prewired connection harness for use on all 24v
Standing Pilot or electronic ignition control systems.
B. Mount the vent damper assembly after the draft
hood, as close to the draft hood as practicable
without modification to the draft hood or vent
damper. (Refer to Figure 7 and to instructions
packed with the vent damper for specific
instructions). This is a must for the wiring harness to
fit and the damper position indicator to be visible to
the users.
Figure : Plug-in Damper Installation
NOTICE
Provide adequate clearance for servicing.
WARNING
Provide " (1.cm) minimum clearance between
damper and combustible construction.
C. Install the 90° BX connector attached to the flexible
conduit in the 7/8" knockout on the left side of the
jacket. Plug the factory wired vent Damper harness
into the polarized receptacle. Install a cable clamp
around the flexible conduit and attach to the Jacket
top panel. (See Figure 7).
NOTICE
Please refer to the specifications, installation
instructions and troubleshooting guide packed
in the vent damper carton for complete detailed
installation instructions. Also refer to Figure  in
this manual.
D Continuous Ignition (Standing Pilot) Only. Remove
knockout from vent damper blade.
E. Size 202 Only. Install 4" x 3" reducing fitting on
vent damper outlet.
13. INSTALL vENT CONNECTOR from reducing
fitting (202 Only), draft hood or damper to chimney, see
Figure 8.