Ansi Standards - Honeywell D896 Installation Instructions Manual

D896 AUTOMATIC VENT DAMPER
NOTE: If there is a power failure, the damper remains
exactly where it is at the moment of failure (open,
closed or somewhere in 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
fails to start, leave the thermostat or controller calling for
heat and troubleshoot the D896 as follows:

ANSI STANDARDS

Procedure For Safety Inspection of an Existing Appliance Installation
The following procedure is intended as a guide to aid in determining that an appliance is properly installed and is in
a safe condition for continuing use.
This procedure is predicated on central furnace, boiler and water heater installations, and it should be recognized that
generalized procedures cannot anticipate all situations. Accordingly, in some cases deviation from this procedure may
be necessary to determine safe operation of the equipment:
a. This procedure shall be performed prior to installation of the automatic vent damper device.
b. If it is determined there is a condition which could result in unsafe operation, the appliance should be shut off and
the owner advised of the unsafe condition. Do not install the automatic vent damper device until the unsafe
condition has been corrected.
The following steps are to be followed in making the safety inspection:
1. Conduct a gas leakage test of the appliance piping and control system downstream of the shutoff valve in the
supply line to the appliance.
2. Visually inspect the venting system for proper size, horizontal pitch and vent termination, and determine there is
no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.
3. Determine that the chimney or vent is acceptable to the authority having jurisdiction.
4. Shut off all gas to the appliance and shut off any other fuel-gas burning appliance within the same room.
shutoff valve in the supply line to each appliance.
5. Inspect burners and crossovers for blockage and corrosion.
Applicable only to furnaces
6.
Applicable only to boilers
7.
8. Insofar as is practical, close all building doors and windows and all doors between the space in which the appliance
is located and other spaces of the building. Turn on clothes dryers. Turn on any exhaust fans, such as range hoods and
bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace
dampers. If, after completing Steps 9 through 14, it is believed sufficient combustion air is not available, refer to local
codes, or in the absence of local codes, to the National Fuel Gas Code, ANSI Z223.1-1988 (NFPA 54), for guidance.
9. Place in operation the appliance being inspected.
will operate continuously.
10. Determine that the pilot(s), when provided, is burning properly and that main burner ignition is satisfactory by
interrupting and reestablishing the electrical supply to the appliance in any convenient manner.
If the appliance is equipped with a continuous pilot(s), test the pilot safety device(s) to determine if it is operating
properly by extinguishing the pilot(s) when the main burner(s) is off and determining, after 3 minutes, that the main burner
gas does not flow upon a call for heat.
If the appliance is not provided with a pilot(s), test for proper operation of the ignition system in accordance with the
appliance manufacturer's lighting and operating instructions.
11. (a) Visually determine that main burner gas is burning properly; i.e., no floating, lifting or flashback. Adjust the
primary air shutter(s) as required.
(b) If the appliance is equipped with high and low flame controlling or flame modulation, check for proper main
burner operation at low flame.
12. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match
or candle, or smoke from a cigarette, cigar or pipe.
13. Turn on all other fuel-burning appliances within the same room so they will operate at their full inputs.
lighting instructions for each appliance.
14. Repeat Steps 11 and 12 on the appliance being inspected.
15. Return doors, windows, exhaust fans, fireplace dampers and any other fuel-gas burning appliances to their
previous conditions of use.
Applicable only to furnaces
16.
operation can be checked by blocking the circulating air inlet or temporarily disconnecting the electrical supply to the
blower motor and determining that the limit control acts to shut off the main burner gas.
Applicable only to boilers
17.
(a) Determine that the water pumps are in operating condition.
(b) Test low water cutoffs, automatic feed controls, pressure and temperature limit controls, and relief valves in
accordance with the manufacturer's recommendations to determine they are in operating condition.
Exhibit A of ANSI Standard Z21.66-1994 for Electrically Operated Automatic Vent Damper Devices
69-1088B
EXHIBIT A
—inspect heat exchanger for cracks, openings or excessive corrosion.
—inspect for evidence of water or combustion product leaks.
—Check both the limit control and the fan control for proper operation. Limit control
—
for use with Gas-Fired Appliances.
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 the system does not light with the damper in
the fully open position, replace the D896
motor with an M896 Replacement Motor.
Follow the lighting instructions.
6
Use the
Adjust thermostat so appliance
Follow