Honeywell Lyric T5 and Honeywell THM5421R1021 IAQ Equipment Interface Module


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Old 04-08-18, 08:23 AM
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Honeywell Lyric T5 and Honeywell THM5421R1021 IAQ Equipment Interface Module

Is Lyric T5 thermostat compatible with IAQ EIM and Zone board?

I have a two-zone system with a zone board.
 
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Old 04-08-18, 08:36 AM
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You can tell if the thermostat is Redlink compatible by looking at the model number.
R = Redlink, WF = wifi (not redlink)
It looks like the Lyric T5 is not Redlink compatible and will not work with the EIM.

If you have enough conductors it may work with the zone board.
 
 

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