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HVAC Forums => HVAC Help => Topic started by: robstar on July 16, 2026, 11:55:07 AM

Title: mars comfort air ac 24 volts wiring
Post by: robstar on July 16, 2026, 11:55:07 AM
Is any of you have experience installing mars comfort air centralized ac? How can I wired outdoor unit using regular 24 volt thermostat? Attached is the wiring diagram of the unit?
Title: Re: mars comfort air ac 24 volts wiring
Post by: robstar on July 16, 2026, 12:26:43 PM
Trying to wire this to furnace with 24 volts thermostat
Title: Re: mars comfort air ac 24 volts wiring
Post by: Admin on July 16, 2026, 02:28:38 PM
Flip dip switches 2 & 3 ON.

Wire C & Y2.
Title: Re: mars comfort air ac 24 volts wiring
Post by: robstar on July 16, 2026, 03:19:29 PM
Wondering why this option isn't on the installation manual, wondering where you get it. will try it, thanks admin
Title: Re: mars comfort air ac 24 volts wiring
Post by: Admin on July 16, 2026, 05:03:36 PM
They released that addendum after the fact.

I also attached the CMA15 line set sizing chart.  Most people assume you have to use 3/4" copper but you can save a fortune using smaller sizes.
Title: Re: mars comfort air ac 24 volts wiring
Post by: robstar on July 16, 2026, 06:43:29 PM
Perfect, thanks again
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