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Barber-Colman Microtherm

Does anyone have a manual for one of these? Trying to balance out old unit ventilator proportional coil valves and damper actuators. I found the overall diagram of the system in Schneider Electric's MP-3xx... Series Reversible and Proportional Electric Actuators General Instructions. They come right out and say "Barber-Colman Microtherm" in the diagrams. No manual on the Microtherm to be found from them, however.