15
VENT DAMPER OPERATION
Figure 7 - Horizontal Installation
Check vent damper and all flue product carrying
areas of boiler annually for deterioration from
corrosion or other sources. If you see corrosion or
other deterioration, contact your service agent for
repairs.
Check vent damper operation as follows:
1.
When boiler is off, check vent damper positions
indicator points to closed position. See Figure 9.
2.
Turn thermostat or controller up to call for heat and
check vent damper indicator points to open position
See Figure 9.
3.
Turn thermostat or controller down again and check
damper position indicator returns to closed position.
4.
Return thermostat to desired position.
Inspect vent damper at least once a year by
trained service technician.
Manual Operation of Vent Damper
•
Place vent damper in open position to permit burner
operation by using “HOLD DAMPER OPEN” switch,
located on damper controller.
•
Thermostat controls burner firing as before, while
damper remains open.
• DO NOT
turn damper open manually, motor damage
will result.
•
Set switch to “AUTOMATIC OPERATION” to close vent
damper during burner off cycle.
•
For further information, and for vent damper
troubleshooting guide, refer to manual Appendix A of
this manual and literature packaged with vent damper.
Horizontal Installation
To Boiler Vent Damper
T
o
Chimney
NO
NO
YES
YES
Flow
Install vent damper
with actuator to sides
of vent only. Do not
mount above or below
vent.
T
o
Chimney
Flow
Vent Damper
To Boiler
Actuator may
be installer in
any position.
Figure 8 - Alternate Vent Damper Installation
Do Not
Install
Here
Caution: Do not
install Vent Damper
within 6" (152mm)
of combustible
material
Install Damper Here
Chimney
Boiler
Figure 9 - Vent Damper Position Indicator
Flue Gas
Flow
Flue Gas
Flow
OPEN
CL
OSED
RO
TA
TION
CL
OSED
OPEN
RO
TA
TION
Damper Closed
Damper Open
Showing Open and Closed Positions
Vent Damper Installation - Follow all cautions
and notes.
•
Install vent damper to service only single appliance for
which it is intended.
• Install vent damper at least 6" (15mm) from
combustible material.
•
Do not install vent damper on vent pipe curve.
•
Do not run wires near high temperature surfaces. Use
standoff brackets if necessary.
•
Install vent damper with actuator to sides of vent only.
Do not mount above or below vent.
WARNING
Asphyxiation or burn hazard. Improper installation
and operation of vent damper could result in serious
injury or death due to fire or to asphyxiation from
poisonous gases such as carbon monoxide which is
odorless and invisible.
!
PN 14683003 Rev. O [10/01/2021]
