DIY Home Improvement Forum banner
1 - 10 of 10 Posts

·
Registered
Joined
·
106 Posts
Discussion Starter · #1 ·
i have 2 OLD thermostats running off batteries.
one of them controls the heating in the basement with only 2 wires:
Temperature Font Gas Rectangle Measuring instrument


the 2nd one controls the cooler on the roof with 4 wires as seen here:
Gadget Rectangle Material property Cameras & optics Gas

Font Gas Technology Electronic device Circuit component



how do i control both of them into the new thermostat, TRANE 14942771? i just bought a 24V AC transformer that has 2 wires coming out.
so having a total of 8 wires, where should the wires go to?
Font Machine Number Temperature Gas
 

·
Registered
Joined
·
106 Posts
Discussion Starter · #7 ·
You’ll need a diff thermostat, something with separate RC and RH terminals. What you have can be done but you’ll need isolation relays with that thermostat.
i swapped for this Honeywell RTH9585WF1004. i am able to have Rc and RH by removing the jumper between them, according to the manual.
these are the pins for it:
Font Rectangle Parallel Number Pattern

please advise on how i can wire them. thank you so much!


these are the 4 pins for cooling system:

Circuit component Font Gas Electronic component Technology


these are the 2 pins for heating
Wood Jaw Electrical wiring Interior design Floor


they go to a controller in the basement labeled TV and T
Hood Motor vehicle Steering wheel Automotive exterior Gas
 
1 - 10 of 10 Posts
Top