15
Figure 10 - Horizontal Installation
Figure 11 - Alternate Vent Damper Installation
Check vent damper and all fl ue 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 12.
2.
Turn thermostat or controller up to call for heat and
check vent damper indicator points to open position
See Figure 12.
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.
WARNING
Asphyxiation or burn hazard. Improper operation of
vent damper may result in serious injury or death
due to fi re or to asphyxiation from poisonous gases
such as carbon monoxide which is odorless and
invisible.
!
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 fi ring 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 packaged with
vent damper.
VENT DAMPER OPERATION
Figure 12 - Vent Damper Position Indicator
Horizontal Installation
To Boiler
Vent Damper
To
Chimney
NO
NO
YES YES
Flow
Install vent damper
with actuator to sides
of vent only. Do not
mount above or below
vent.
To
Chimney
Flow
Vent Damper
To Boiler
Actuator may
be installer in
any position.
Do Not
Install
Here
Caution: Do not
install Vent Damper
within 6" (152mm)
of combustible
material
Install Damper Here
Water Heater
Chimney
Boiler
Flue Gas
Flow
Flue Gas Flow
OPEN
CLOSED
ROTATION
CLOSED
OPEN
ROTATION
Damper Closed
Damper Open
Showing Open and Closed Positions
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