Small world. I am from Priddis, Alberta, SW of Calgary way up high in the hills. 4400 ft to be exact. Your not very far away.
OK, the (Damper Actuator and link drive) is ERIE make and part #0453H0038KB00.
110V 50Hz and 120V 60Hz 6.5 watt. I think I paid about $120 for complete unit.
The electronic controls switch it on or off. When on the motor just keeps pushing (through gears) on wheel which hold damper door open. When power off spring rolls moter in reverse. I think if you keep grit out of the mechanism they last a very long time. I did not seal mine and over a year or so enough ash,grit got in to jam it. Cleaned and put back on. That was last fall.
I am trying to figure out how to inset a picture, will work on that. In the mean time take a look at HArmon sitehttp://www.harmanstoves.com/Browse/Stov ... al-heating
You can download the manual and there are pictures of draft door etc.