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Very wise hvac1000, I'll work on that

Hello guys, howdy?
I need help to connect remote summer/ winter switch for UL captive Aire model: (NHMUA 1-6-10 ) make-up air unit.

It is old and used unit and the diagram is missing. Anyone...

I'm not sure, it's late to go back now but I'll go 1st in the morning, you guys saved my ###, thank you very, very much. I'll late you know tomorrow. Thanks

I do not have this option, Do you have any brand and model suitable to work with this unit

OK, my bad:) it is Carrier, model: 50SD, sigle-package Electrical Cooling/Heating Units.

It has 2 separate unites; AC unit and Heating unit with separate control leads. 1st control lead includes:...

I have installed new rooftop unit- electrical heating & cooling- few weeks ago. When I run the cooling everything goes fine (blower and composer) but if I run the heating; heat element will fire up...