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Forsafe,efficientoperation,the vent damper and all flue
product carrying areas of the appliance must be checked
annually by you, with particular attention given to deterioration
from corrosion or other sources. If you see corrosion or other
deterioration, contact your heating contractor tor repairs.
Check vent damper operation as follows:
1. When the boiler is off, check that the vent damper position
indicator points to the closed position, Fig. 11.
2. Turn the thermostat or controller up to call for heat and
check that the vent damper indicator points to the open
position, Fig. 11.
3. Turn the thermostat or controller down again and check
that the vent damper position indicator returns to the closed
position.
MANUAL OPERATION OF THE VENT DAMPER
The Effikal vent damper may be placed in the open position
to permit burner operation by using the "HOLD DAMPER
OPEN" switch, located on the damper controller. The
thermostat will control the burner firing as before, while the
damper will remain open. DO NOT turn damper open manu-
ally or motor damage will result. Set switch to "AUTOMATIC
OPERATION" to close vent damper during burner off cycle.
For further information,and for a vent damper !roubleshooting
guide, refer to the Effikal manual that was packaged with
the vent damper.
The vent damper must be inspected at least once a
year by a trained, experienced service technician, The
name of the person who originally installed your vent
damper is shown on the installation label,
iI 010
i6 °
°1
DAMPER CLOSED OAMPEROPEN
SHOWING OPEN AND CLOSED POSmON