Copyright © 1997 Honeywell Inc. • All Rights Reserved
X-XX UL
INSTALLATION INSTRUCTIONS
D896
Automatic Vent Damper
APPLICATION
The D896 Automatic Vent Damper is a 24 Vac, motorized
stack damper. The damper closes off the furnace or boiler
stack during the heating off-cycle. Use the D896 only on
Underwriters Laboratories Inc. listed and American Gas
Association design certified atmospheric type, gas-fired
furnaces and boilers. The furnaces or boilers must be
equipped with a draft hood that has an outlet area no
larger than the inlet area of the damper. Do n
ot use with
an oil-fired furnace or boiler, power burner, or direct vent
furnace or boiler.
IMPORTANT
1.
The atmospheric draft hood outlet area must be
smaller or equal to the inlet area of the damper
assembly.
2.
If a second gas valve needs to be installed, refer
to the gas valve manufacturer instructions for
procedure.
3.
Dual automatic valve combination gas controls or
two separate single function main gas valves are
required with the D896.
4.
Do not use the D896 with the L8148 or L8124
with a manual/automatic switch because the
switch can override the safety interlock in the
system wiring, causing a hazardous condition.
5.
Do not install the D896 on an appliance with an
automatic valve with a manual opener unless the
manual opener is rendered inoperative or the
automatic valve is replaced with an automatic
valve without a manual opener.
6.
On retrofit applications, installation identification
label (provided) must be filled out by installer and
applied to outside of cover.
OPERATION
On a call for heat, the CALL FOR HEAT LED on the
actuator lights and the damper begins to open. When the
damper is fully open, the IGNITION GAS PWR LED lights
and the furnace or boiler burner ignites. When the heating
cycle ends, both LEDs are truned off, the burner turns off
and the damper automatically closes. Heating system
efficiency is increased because the closed damper
reduces the loss of residual appliance heat and heated
room air through the draft diverter.
INSTALLATION
When Installing this Product…
1. Read these instructions carefully. Failure to follow
them could cause a hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained experienced service
technician. The D896 must be installed in compli-
ance with local codes or the Natural Gas Installation
Code CAN/CGA-B149.1-M91 and CSA C22.2 #3
Electrical Features of Fuel Burning Equipment, the
National Fuel Gas Code (ANSI Z223.1—NFPA 54)
and the National Electrical Codes (ANSI C1—
NFPA70). Use ANSI Standard Z21.66-1994
(included at the end of this document) during
installation.
IMPORTANT
In Canada, the damper is not certified for retrofit
application. Certification for the suitability of the
damper and appliance combination must be
determined by the Canadian Gas Association.
4. The D896 must be installed only on an appliance
connected to a factory-built chimney or vent
complying with a recognized standard, or to a
masonry or concrete chimney lined with a lining
material acceptable to local code.
5. After installation is complete, check out product
operation as provided in these instructions. See
Exhibits A and B at the end of these instructions.
CAUTION
Can cause electrical shock or
equipment damage.
1.
Disconnect power supply.
2.
Do
not install within 6 in. (152 mm) of combus-
tible materials.
3.
Do
not negate the action of any existing safety
or operational control.
69-1088B
