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Honeywell M896 Installation Instructions Manual page 3

Damper actuator
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M896/D896
4
LED 2
MOTOR
NORMAL
S4
5
SERVICE
N.O.
N.C.
S1
C
N.O.
N.C.
S2
C
LED 1
3
POLARIZED 4-PRONG MALE MOLEX PLUG AND
4-PRONG FEMALE MATING PLUG ON CABLE
SWITCHES AS SHOWN: S1,S2,S3
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
AFTER M896/D896 VENT DAMPER IS PLUGGED TO L8148E1166, FUSE
BLOWS WHEN THERMOSTAT FIRST CLOSES. AFTER FUSE BLOWS,
L8148E1166 OPERATES ONLY WHEN VENT DAMPER IS CONNECTED.
3
LED 1 LIGHTS WHEN DAMPER IS OPEN.
4
LED 2 LIGHTS WITH CALL FOR HEAT.
5
SERVICE SWITCH. THE NORMAL SWITCH SETTING IS NORM. IF THE
SWITCH IS MOVED TO THE SERV POSITION, THE DAMPER REMAINS OPEN.
Fig. 5. Wiring diagram for M896 (D896) connection to S8600/S8610 using wiring harness with two Molex plugs.
SETTINGS
The service switch has both a normal (NORM ) and a
service (SERV) mode.
NORM — M896 opens on a call for heat and closes at
the end of the heating cycle.
SERV — M896 electrically opens after the thermostat
has a call for heat and remains open.
CHECKOUT
Heating
1. Turn off the power supply.
2. If using a thermostat, set the heat anticipator to
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 M896 Damper Actuator opens the
damper before the gas valve opens and the pilot or
main burner ignites. See Fig. 6.
WIRING
HARNESS
4
R1, R2, R3
K1
250 OHMS
2
N.O.
N.C.
C
S3
K1
1
3
DAMPER OPEN
DAMPER CLOSED
24 Vac
THERMOSTAT
4
T
2
3
FUSE
2
5
1
6-PRONG FEMALE MOLEX
RECEPTACLE IN L8148E
AND 5-PRONG MALE
MOLEX PLUG ON CABLE
NOTE: If a boiler gas control is sequenced by the
Aquastat® Controller, be sure that the
actuator opens the damper prior to the
opening of the gas control.
5. Turn the thermostat or controller 10°F (6°C) below
the room temperature. Check that the M896 Damper
Actuator closes the damper.
6. Cycle the heating system three times using the
thermostat or controller to assure that the system is
operating safely.
3
M896 DAMPER ACTUATOR
L8148E1166
W
TV
1K
Z
C1
C2
1K1
B2
L1
L2
B1
CIRCULATOR
L1
L2
(HOT)
1
24V GND
24V
M11368
69-1089B–1

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