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WARNING
!
Asphyxiation, burn hazard. Improper operation of
vent damper may result in serious injury or death
due to fire or to asphyxiation from poisonous gases
such as carbon monoxide which is odorless and
invisible.
Damper Installation
B.1
Follow Damper installation instructions provided with
damper. See Figure 1a & 1b.
Verify only boiler is serviced by Vent Damper. Figure 2.
1.
Clearance of 6 inches (152 mm) between Vent
2.
Damper and combustible material shall be maintained.
Allow additional clearance for service of Vent Damper.
Vent Damper shall be in the open position when
3.
appliance main burners are operating.
Vent Damper position indicator must be in visible
4.
location following installation.
B.2 Vent Damper
Check vent damper and all flue product carrying areas of
boiler annually for deterioration from corrosion or other
sources. Contact your service agent for repairs.
Check Vent Damper Operation as follows:
When boiler is off, check vent damper position
1.
indicator points to closed position. See Figure 3.
Turn thermostat or controller up to call for heat and
2.
check vent damper indicator points to open position
See Figure 3.
Turn thermostat or controller down again and check
3.
damper position indicator returns to closed position.
Return thermostat to desired position.
4.
Place vent damper in open position to permit burner
5.
operation by using "HOLD DAMPER OPEN" switch,
located on damper controller.
Thermostat controls burner firing as before, while
6.
damper remains open.
DO NOT turn damper open manually, motor damage
7.
will result.
Set switch to "AUTOMATIC OPERATION" to close vent
8.
damper during burner off cycle.
For further information, and for vent damper
9.
troubleshooting guide, refer to manual packaged with
vent damper.
APPENDIX B - VENT DAMPER INSTALLATION
Figure 1a - Horizontal Installations
Vent Damper
To Boiler
Install vent damper with actuator to sides of
vent only. Do not mount above or below vent
Figure B-1b - Vertical Installations
T
o Chimney
Flow
To Boiler
Figure 2 - Alternate Vent Damper Installation
Do not install Vent
Damper within
6" (152mm) of
combustible material
Install Damper Here
Boiler
Figure 3 - Vent Damper Position Indicator
Damper Closed
Open and Closed Positions Shown
36
Flow
NO
YES
T
NO
o Chimney
Vent
Damper
Actuator may be
installed in any
position
Do Not
Install Here
Water
Heater
Damper Open
PN 240012787 Rev. C [11/15/2020]
YES
Chimney
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