Figure 8 - Vent Damper Installation |
| Figure 9 - Vent Damper Placement |
Annually check vent damper and all flue product carrying areas of appliance, with particular attention given to deterioration from corrosion or other sources. If you see corrosion or other deterioration, contact your heating contractor for repairs. Check vent damper operation as follows:
•When boiler is off, check vent damper positions indicator points to closed position, Figure 10.
•Turn thermostat or controller up to call for heat and check vent damper indicator points to open position.
•Turn thermostat or controller down again and check damper position indicator returns to closed position.
Vent Damper Manual Operation
Vent damper may be placed in open position to permit burner operation by using “HOLD DAMPER OPEN” switch, located on damper controller. Thermostat will control burner firing as before, while damper will remain 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 vent damper troubleshooting guide, refer to manual packaged with vent damper.
Inspect vent damper at least once a year by a qualified service technician.
Figure 10 - Vent Damper Position Indicator
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