What two-stage thermostat to use?


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Old 04-02-03, 01:04 PM
ct287
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Question What two-stage thermostat to use?

Need to replace an old manual Lennox two-stage thermostat that is only used for AC. What do you use for your two-stage cooling system (not heat pump)? Is the $150 Honeywell T8624D Chronotherm IV Deluxe worth the price? You can get a digital single-stage thermostat for $15 at HD. Why two-stage thermostat is much more expensive? Thanks in advance.
 
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Old 04-02-03, 01:44 PM
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tstat

Do you know for sure you have a 2 stage set up on your AC units or need one??Or does it control 2 AC units?I dont think you need that old chronotherm. Need more info on the unit or units you have ED
 
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Old 04-02-03, 01:58 PM
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Is this thermostat used in a commercial setting?
 
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Old 04-02-03, 02:38 PM
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Check it out again. Typically when a thermostat says it is 2 stage they are referring to heat. Heat pumps are 2 stage (and popular) but in heating mose only. But as the boys are implying, 2 stages of cooling are rare in residential installations.

Ken
 
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Old 04-02-03, 03:46 PM
ct287
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It is a two-speed compressor

there is an extra wire for turn on the high speed when it's hot enough. It is a Lennox residential system.
 
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Old 04-02-03, 03:56 PM
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I'll be darned

Sounds like you will need to match that 2 stage cool. That could elevate the price of a replacement. Sorry to doubt your knowledge of your requirements.
 
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Old 04-02-03, 05:27 PM
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ct287:

Even though you have a residential unit you are in the realm of a commercial thermostat and unfortunately have to pay the price.
 
 

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