Specifications

30
Gas-Fired Fireplace
6.6 Mechanical Draft System (automated) for
a Gas-Fired Fireplace with a Single Flue with
Safety System per NFPA54/IFGC
Application
This is the most automated type of installation for
a gas replace application. The ADC100 control
monitors both operation and the safety system.
No adjustments are necessary after the system is
installed and commissioned. The ADC100 does not
have to be visible and can be installed in the attic.
Proven Draft Switch is part of ADC100 control.
Sequence of Operation
1. During commissioning, the fan speed is set using
the potentiometer located on the ADC100 control
board.
2. When the gas igniter is activated, the fan speed
increases. Once the proven draft switch closes, the
fan returns to the speed setting of the potentiometer
and the ADC100 releases the gas valve
3. If proper draft is not maintained, the ADC100 will
increase fan speed gradually until the PDS closes.
If the PDS has not closed 10 seconds after the fan
reaches 100% speed, the ADC100 will shut off the
gas valve and go into alarm mode. If the PDS closes
while in alarm mode, the fan will resume the original
speed setting.
4. Once the replace is turned off, the fan will
continue to operate for a set post-purge time
(adjustable between 0-10 minutes) to remove any
remaining products of combustion before shutting
down.
5. In case of a mechanical or electrical failure the
ADC100 will shut off the gas valve.
System 6
ADC100
+/-
RED ORANGE WHITE BLACK GREEN
FAN
MOTOR
120/1/60
NOTES:
THE DISCONNECT MEANS AND CIRCUIT PROTECTION ARE TO
BE PROVIDED BY THE INSTALLER OF THIS DEVICE
1
All wiring must be in
flexible or rigid metal
conduit
LEGEND:
24 VAC
120 VAC
N
L
FAN CONTROL UNIT
7 8 9 10 11 12 13 14 15 16 17 18 19
1 2 3 4 5 6
WEATHERPROOF BOX
MAIN CONTROL UNIT
6 5 4 3 2 1
All wiring must be in
metal conduit or
shielded cable