DIY Home Improvement Forum banner

1 - 4 of 4 Posts

·
Registered
Joined
·
16 Posts
Discussion Starter · #1 ·
We just bought a new house in Minnesota. There are 2 zones (upstairs and downstairs) for HVAC.

First question: the system has to be manually switched from heat to AC with a toggle switch in the utility room. Is this common/normal for northern homes (moved here from Florida). unlike Florida, we now have days where we need both heat and AC!

The picture is the control system in the utility room
654774


Next, both thermostats are older dial style that just set temp. There is no on/off/heat/cool switch. Is it possible to change them to new smart thermostats and allow them to control whether we are getting heat or AC?
 

·
Registered
Joined
·
703 Posts
The manual change over switch is normal for the age of your panel. Installing wifi capable thermostats to this panel would be problematic. The easiest thing to do would be replace the zone panel (Honeywell HZ311, see link) and rewire your damper motors as shown in the picture. Wire M1, M4 and M6 to the respective zone terminals in the new zone panel. The hardest thing you would have to do is run at least 5 conductor (or more depending on what type of heat you have) thermostat wire to each thermostat. The panel can be operated with wireless technology but the cost does go up a bit. Not really difficult to do.


654781
 

·
Administrator
Joined
·
41,578 Posts
Yep, just that panel's design. Replace it with new 2 stage zone panel. So you can opt for a 2 stage unit down the road if you want. Without having to replace the panel again.
 

·
Registered
Joined
·
703 Posts
Yep, just that panel's design. Replace it with new 2 stage zone panel. So you can opt for a 2 stage unit down the road if you want. Without having to replace the panel again.
Good plan. If you can run new thermostat wires, run at least 8 conductors. If you plan on installing any accessories run more.
 
1 - 4 of 4 Posts
Top