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D896 AUTOMATIC VENT DAMPER
68-0186
8
Fig. 10. Snap-Tite™ Box Connector release.
Checkout
Heating
1. Turn on the power supply.
2. If using a thermostat, set the heat anticipator at 0.13A.
3. Set the thermostat or controller to 10°F (6°C) above the
room temperature to call for heat.
4. Check that the D896 CALL FOR HEAT and IGNITION
GAS PWR LEDs light and that the damper opens
before the gas valve opens and the pilot or main burner
ignites. See Fig. 11.
NOTE: If a boiler gas control is sequenced by the
Aquastat® Controller, make sure that the
damper opens prior to the opening of the gas
control.
5. Turn the thermostat or controller 10°F (6°C) below the
room temperature. Make sure the LEDs turn off and the
D896 closes.
6. Cycle the heating system at least three times using the
thermostat or controller to assure the system is
operating safely.
Cooling
CAUTION
Damage to air conditioner condenser possible.
Do not operate cooling if outdoor temperature is below
50°F (10°C).
1. Set the thermostat or controller to COOL. Move the
setpoint to 10°F (6°C) below the room temperature.
2. Make sure the cooling system operates.
3. Check that the D896 is in the closed position. See Fig.
11.
4. Return the thermostat or controller to the desired
settings.
NOTE TO INSTALLER: Explain to the homeowner that a
yearly inspection by a trained, experienced service
technician is necessary for safe, efficient operation
of the vent damper and heating system. The
homeowner should check for deterioration from
corrosion or other sources between service
technician calls.
TROUBLESHOOTING
WARNING
Fire or explosion hazard can cause property
damage, severe injury or death.
Explosion or carbon monoxide poisoning
possible.
Never apply a jumper across or short gas control
terminals or wires because this can force the D896 to
remain closed and cause an explosion.
THE AIR DUCT IS CLOSED WHEN THE
INDICATOR POINTS PERPENDICULAR TO
THE DIRECTION OF THE AIR DUCT
THE AIR DUCT IS OPEN WHEN
THE INDICATOR POINTS IN THE
DIRECTION OF THE AIR DUCT
M3431
Fig. 11. Determining damper position.