Need Recommendation: Stat/Sensor for hydroair return line

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Old 11-10-20, 11:41 AM
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Need Recommendation: Stat/Sensor for hydroair return line

I have two hydroair units in the house. The blower is controlled by a Taco HAFC201-4. I want to attached a sensor/probe/aquastat (whatever the correct term is) to the return line after the exchanger to trigger when the fan will turn on (the HAFC201-4 already has a TT connection for this). So the sensor should be normal but close when a set temperature or above it is achieved. Ideally the set temp is variable and the thing is cheap. lol. Does a cheap sensor/swtich like this exist?

Thanks.
 
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Old 11-10-20, 11:49 AM
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ive found something like the Honeywell L4006B. This makes the circuit on temperature rise but does it work with a 24V TT switch? Its designed for 120/240V circulators? Its also a bit pricier than I want to spend.
 
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Old 11-10-20, 07:50 PM
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Ranco makes some pretty good and inexpensive temperature controls that'll probably work for your intended purpose.

I'm not sure this one is exactly what you need, but here's one example: RANCO ETC 120 Series
 
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Old 11-10-20, 08:28 PM
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ebay has temperature controllers starting at $2.00
https://www.ebay.com/sch/i.html?_fro...acat=0&_sop=15
 
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Old 11-10-20, 09:24 PM
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I agree with Doug 100%. Go with an inexpensive digital controller. You can get a basic board for a couple of bucks or in a nice case for $10-15.

Most will run on 12vdc and have a form C relay.... (normally open and normally closed)
Will connect directly to TT connections.

Relay type temperature controllers
 
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Old 11-11-20, 09:19 AM
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Exactly what I needed. Thanks guys
 
 

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