Operating instructions
For boilers connected to gas vents or chimneys, vent installations shall be in accordance with Part 7 NFGC, Venting of Equipment, in the United
States or Part 7 NFGCPIC, Venting System and Air Supply for Appliances, in Canada, and applicable provisions of local building codes.
Vent connectors serving appliances vented by natural draft shall not be connected into any portion of mechanical draft systems operating under
positive pressure.
VENT DAMPER OPERATION
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 vent damper is shown on installation label.
PROCEDURE 1—AUTOMATIC OPERATION OF VENT DAMPER
For safe, efficient operation, vent damper and all flue product carrying areas of appliance must be checked annually with particular attention given
to deterioration from corrosion or other sources. If corrosion or other deterioration is observed, contact your heating contractor for repairs. Check
vent damper operation as follows:
1. When boiler is off, check that vent damper position indicator points to CLOSED position. (See Fig. 6.)
2. Turn thermostat or controller up to call for heat and check that vent damper indicator points to the OPEN position. (See Fig. 6.)
3. Turn thermostat or controller down again and check that vent damper position indicator returns to CLOSED position.
PROCEDURE 2—MANUAL OPERATION OF VENT DAMPER
The Effikal vent damper may be placed in OPEN position to permit burner operation by using HOLD DAMPER OPEN switch located on damper
controller. The thermostat controls burner firing as before while damper remains open. DO NOT turn damper open manually 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 troubleshooting guide, refer to the Effikal manual packaged with vent damper.
PROCEDURE 3—NOTES FOR CANADA ONLY
1. Canadian Standard CAN1-2.28-M81 prohibits the use of vent dampers on propane-fired appliances with intermittent ignition.
Fig. 6—Vent Damper Position Indicator
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FLUE GAS FLOW
CLOSED
OPEN
ROTATION
DAMPER CLOSED
FLUE GAS FLOW
CLOSED
OPEN
ROTATION
DAMPER OPEN
Fig. 5—Horizontal and Vertical Vent Damper Installation
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FLOW
FLOW
YES
NO
NO
YES
TO FURNACE
OR BOILER
TO FURNACE
OR BOILER
VENT
DAMPER
VENT
DAMPER
ACTUATOR MAY BE
INSTALLED IN
ANY POSITION
INSTALL VENT DAMPER WITH
ACTUATOR TO SIDES OF
VENT ONLY. DO NOT MOUNT
ABOVE OR BELOW VENT.
TO CHIMNEY
TO CHIMNEY
HORIZONTAL INSTALLATION
VERTICAL INSTALLATION
Fig. 7—Typical Installation for Vent Damper
(Note Caution and Footnotes)
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BOILER
CAUTION: Do not install
the vent damper
within 6 in. (152 mm) of
combustible material.
WATER HEATER
CHIMNEY
1
2
3
1.
2.
3.
Install the vent damper to service only the single appliance for
which it is intended. If improperly installed, a hazardous condition,
such as an explosion or carbon monoxide poisoning, could result.
Do not install the vent damper on vent pipe curve.
Do not run wires near high temperature surfaces. Use stand-off
brackets if necessary.
INSTALL
DAMPER
HERE
NOT
HERE
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