Wiring old damper motors

TFK

I hope the Wall is appropriate for this topic. 

Years ago, I replaced my furnace and added A/C. The system is two-zone forced air, and at the time I couldn’t afford the added expense of having a control panel installed, so I had them hook up only one thermostat and leave the dampers open, with the hope of eventually adding a control panel. Having only one zone has sufficed, but now I would like to reactivate the system. 

Unfortunately, I forgot to grab the panel with the wiring diagram from the old furnace. When I asked a HVAC pro about the motors (images attached), the answer was simply, “they’re obsolete.” 

Can anyone explain how the wiring works? Or point me to a good resource for figuring it out? (Or suggest good replacement motors?)

HVACNUT

I would update everything. Honeywell or EWC panel and dampers. No summer/winter switch. No master/slave thermostats. 
Is the blower motor ECM, or is there a bypass relief?

EBEBRATT-Ed

I haven't seen one of those in years.

24 volt power from your transformer (2) wires 1 goes on T the other wire goes on R on the motor. Then the thermostat should be a 3 wire single pole double throw they used to use Honeywell T26 thermostat. You could also use a old mercury Honeywell T86 or T87. Then you need 3 wires from the motor to the thermostat.

On the motor you connect the 3 thermostat wires R on motor goes to R on the thermostat. W on thermostat to W on motor and B on the motor to Y on the thermostat. The thermostat if one of the above will have a sub base. The motor is drive open and drive shut. If it works backwards you swap the W & B
wires on the motor

ch4man

blue for BTU, Y closes the damper in heating mode

I think

ch4man

EWC is the system id recommend for replacement as you have single dampers rather than opposed damper assemblies

TFK

Thanks for the info! The blower is ECM and keeping up with the below zero weather in MN!