7.3 Set-Up
To maintain the stack pressure through the Autoflame draft control system, the following is required:
Mk7 M.M. with Expansion Board
Air Pressure Sensor MM70005 (SN 100 upwards)
Industrial Servomotor
Note: A small or large servomotor can be used for smaller applications, however an industrial
servomotor is recommended for the appropriate softened error checking for a large damper. If the site
requires a new damper for draft control, please contact Autoflame Technical Support.
7.3.1 Terminals
The following terminals on the expansion board are used for the Autoflame draft control:
DPC Draft air pressure sensor (check)
DPS Draft air pressure sensor (signal)
DP- Draft pressure sensor & motorised draft control damper voltage –ve
DP+ Draft pressure sensor & motorised draft control damper voltage +ve
DPW Motorised draft control damper potentiometer wiper
DCI Motorised draft control damper servomotor – increase (output switched neutral)
DCD Motorised draft control damper servomotor – decrease (output switched neutral)
7.3.2 Draft Control Expansion Options
The draft control system can be configured through the following expansion options.