69-1088B
3
D896 AUTOMATIC VENT DAMPER
To Install the D896:
1. Push the female end of the vent damper over the
section of vent pipe coming from the furnace or
boiler, but after the draft hood. Push the section of
the vent pipe coming from the chimney over the
male end of the vent damper.
2. Secure the vent damper to the vent pipe with 1/2 in.
(12 mm) sheet metal screws. Use only the holes
provided.
3. Visually inspect the venting system for proper pitch.
Pitch must comply with local codes or ANSI
Z223.1—NFPA54.
To Install an Additional Gas Valve:
1. Shut off the gas and electricity to the gas burner
(use the manual shutoff valve in the supply line to
the appliance).
2. Locate a position in the supply line between the
appliance automatic gas valve and the burner.
3. At the determined position, install an approved
appropriately-sized single function automatic gas
valve downstream of the existing automatic gas
valve. Follow the valve manufacturer instructions for
flow direction and position.
4. Restore the gas line supply and conduct a leak test
on the gas piping and control system downstream of
the appliance shutoff valve.
Wiring
WARNING
Severe illness or death possible. Prevent
explosion or carbon monoxide poisoning.
1.
Dual automatic valve combination gas
controls or two separate single function main
gas valves are required with the D896 to
prevent explosion or carbon monoxide
poisoning.
2.
Do not use the D896 with an L8148 or L8124
with a manual/automatic switch because the
switch can override the safety interlocks in the
system wiring causing carbon monoxide
buildup.
CAUTION
1.
Remove the shorting plug on the S8600,
S8610 or L8148E before attaching the wiring
harness.
2.
Do
not permit device wiring to contact high
temperature surfaces.
3.
Label all wires prior to disconnecting when
servicing controls. Wiring errors could cause
explosion or carbon monoxide buildup.
IMPORTANT
Once the system has operated with the D896
plugged into the S8600, S8610 or L8148E, do
not operate the system with the D896 unplugged.
The control module will not operate.
A wiring harness is included with most D896 models. Use
the harness to wire the D896 according to the furnace or
boiler manufacturer wiring instructions, if available.
Otherwise, follow these instructions:
1. Connect the molex plug to the D896 harness cable
connector. See Fig. 4.
2. Use Fig. 5 and 6 to connect the other end of the
harness to the furnace, boiler or control module. If
field wiring is required, see the appliance manufac-
turer instructions or see Fig. 7 for a typical wiring
example.
3. Cycle system through at least two applicance
operations.
Fig. 4. D896 with cover off.
NORM
SERV
SERVICE
SWITCH
HARNESS
CABLE
CONNECTOR
IGNITION GAS
PWR LED
CALL FOR
HEAT LED
S3 SWITCH
RELAY 1K
USE STANDARD SCREWDRIVER TO MANUALLY OPEN AND
CLOSE VENT DAMPER. PLACE SCREWDRIVER IN SLOTTED
KNOB AND ROTATE COUNTERCLOCKWISE UNTIL
BOTH LEDS TURN ON.
1
1
D896
M11373
