Connect the two existing damper ouput wires to belimo terminal 1
and 3.
Connect the belimo motor terminal 2 to any
thermostat input “R” on board.
Use Black pushbuttom clutch on motor to rotate damper half way
open, then release clutch.
A. If motor powers open, you should be done.
B. If motor powers close, you should use o/1 reversing switch on
face of motor to reverse travel
C. If motor does not move damper, reverse wires 1 and 3.
Whats going on:
If you have a meter, you can check this.
Here is what you are trying to do:
24vac power is being applied full time to motor termnals 1 and
2.
Switched power from one of the two existing damper outputs is
switched to motor terminal 3. (sometimes the zone board schematic
on inside cover will show this, and sometimes not)
Electrically, the same leg of zone control transfomer that is on
thermostat input R goes to motor terminal 2
The other Leg of zone control transformer that is on Thermostat
C goes to motor terminal 1.