69-1089B–1
4
M896 DAMPER ACTUATOR
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7
Helping You Control Your World
®
69-1089B–1 G.H. 9-97 Printed in U.S.A.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis, MN 55408-0524
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
M3943
Fig. 6. Determining damper position.
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 10
°
F (6
°
C) below the room temperature.
2. Make sure the cooling system operates.
3. Check that the damper remains in the closed
position. See Fig. 6.
4. Return the thermostat or controller to the desired
settings.
NOTE TO INSTALLER:
Explain to the homeowner that a yearly inspec-
tion by a trained, experienced service technician
is necessary for safe, efficient operation of the
vent damper and heating system. The home-
owner 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. This can force the damper to
remain closed and cause an explosion.
NOTE:
If there is a power failure, the damper remains
exactly where it is at the moment of failure (open,
closed, or somewhere between). When power is
restored, the damper opens if the thermostat is
calling for heat or closes if the thermostat is not
calling for heat.
Set the thermostat or controller below the room tempera-
ture. Wait one minute and turn the thermostat or controller
above the room temperature to call for heat. If the system
does not start, leave the thermostat or controller calling for
heat and troubleshoot the M896/D896 as follows:
Use a voltmeter and check for 24 Vac at the S8600,
S8610, L8148E, gas valve or other control.
1. If no voltage, check the transformer, limit controller
and wiring.
2. If 24 Vac is present, and the D896 is open, refer to
the furnace or boiler manufacturer instructions.
3. If D896 is closed:
a.
Place the service switch in the SERV position.
See Fig. 4.
b.
Manually open the damper using a standard
screwdriver. Place screwdriver in slotted knob
(see Fig. 4) and rotate counterclockwise until
both LEDs turn on.
c.
If system does not light with damper in the
fully open position, replace the M896.