The below schematic works for M400 & M800 actuators. The system needs a 30VA transformer for the new actuator. The actuator dipswitches need to be adjusted for Floating [24v open & 24v close] dipswitches 1 & 2 on and the rest off.
There is a red manual operation handle on the actuator, see figure 2. When it is lowered, the motor stops. Then the actuator can be operated manually if the handle is turned.
: Actuators are shipped with manual override lowered (MAN). For normal operating, the handle must be raised (AUTO).