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2 stage Thermostat Function

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johntrhodes81
johntrhodes81 Member Posts: 53
in THE MAIN WALL
Hello,

I am new here but tried searching and didn't find anything.

I am working on the integration of a hydronic and forced air system and have a question about the function of 2 stage (2H/2C) thermostats.

When the thermostat calls for stage 2 heat or cool (W2 or Y2) are the stage 1 terminals (W1 or Y1) still energized?
Or does it depend on brand of thermostat?

Trying to determine if I need to plan on additional relay logic to energize stage 1 when stage 2 is energized.

Thanks,
John R.

Comments

  • bob_46
    bob_46 Member Posts: 813
    I hesitate to make a blanket statement but in my experience the first stage stays closed when the second stage closes .

    There was an error rendering this rich post.

  • johntrhodes81
    johntrhodes81 Member Posts: 53
    Thanks.

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