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Thread: Zone Panel and Thermostat Upgrade Questions

  1. #1
    Junior Member

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    Zone Panel and Thermostat Upgrade Questions

    Good Morning,

    First post here, but the forum looks like a great, very helpful community. happy for the opportunity to ask some questions.

    Just bought a home:
    Propane heat, 2 zones (2 honeywell damper units), no heat pump
    1 AC unit

    The old thermostats are 2 ancient Honeywell Chonotherms.

    The zone control panel is an old Mastertrol Mark V
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    I tried installing a Nest and an Ecobee (i have one of each, it's never been a problem in the past, but i'd happily align them if it would help things run smoother). The ecobee made the system turn on, but not off. and the Nest made it short cycle.

    So i understand the Mastertrol is incompatible with the new smart thermostats. So i bought a HZ311 TrueZONE.

    The switch looks fairly straightforward thanks to some of the other posts on here. Damper wires go to the dampers, stat wires to the stats.

    There are 2 wildcards that i'm not sure about.
    1. The Mastertrol has a "System Selector Switch" terminal that connects to an external switch that chooses Heat, Cool, Fan, Off. Will the new HZ311 just obsolete this? the stats will do the selecting?
    2. I have a GeneralAire 1040 Bypass Style Humidifier. It looks like this connects to a 24v transformer on the Mastertrol. Will switching to the HZ311 kill the humidifier?

    I'm happy to provide more details and photos, and look forward to any advice the forum can provide.
    Thanks!

  2. #2
    Member

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    1. Correct, the thermostats select heat/cool/fan so you don't need a master switch.
    2. The zone controller doesn't control a humidifier. Normally you connect the humidifier to the main thermostat and let it control (set to hum w/heat).

  3. #3
    Junior Member

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    Thank you, I was hoping to run my wiring by the forum folks:
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    Thank you, I was hoping to run my wiring by the forum folks:
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    Couple Questions:
    I have a weird wiring circle between by AC, Furnace and Generator
    AC: White is capped with Blue from Furnace
    AC: Red is spliced with white from the generator
    Generator Red goes to Terminal Y on the Control Board
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    Hope to review the actual thermostat wiring once the zone control panel is installed

  4. #4
    Junior Member

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    bump!


  5. #5
    Member

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    You didn't ask a question?

    Comments:
    Damper wiring should connect to M1 and M4 on new panel.
    AC connection to generator is either to not run it at all while on generator power or to not run it during startup. Look up "load shedding."
    Last edited by Stuff; 02-10-2020 at 06:17 AM.

  6. #6
    Junior Member

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    Apologies for not being more clear.

    I just want confirmation of what the wiring should be on the new honeywell HZ311
    Is it a straight lift and shift from
    Y on Mark V contains Yellow from Furnace and Red from AC / Generator splice for load shedding these will go to Y on HZ311
    G on Mark V contains Green from Furnace this will go to G on HZ311
    Rc Jumps to Rh on Mark V There is a factory installed jumper on the HZ311 that will remain in place
    Rh on Mark V contains Red from Furnace this will go to Rh on HZ311
    W on Mark V contains W From Furnace this will go to Won HZ311
    CAPPED Blue from Furnace and White from AC these will remains spliced / capped together and not connect to HZ311

    My only other question- blue and green wires from my old stats were going to the 24V transformer on the old panel. This won't be necessary anymore as the new HZ311 has a C terminal and G terminal for each stat individually. This should also enable fan-only mode from the stats which wasn't available previously.

    I'm grateful for your expertise! Just let me know if i'm on the right track

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