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Anyone Anyone

 
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Old 02-19-2008, 12:44 AM   #1
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Anyone Anyone


Looking for a device made by Honeywell.

Imagine a device that is inline with a water pipe. There is a probe that measures the exact water temp flowing past (or standing). That probe has a wire that goes to a controller. That controller is programmable to turn a device such as a recirculation pump on or off based on a preset temp. When the temp falls....say 20 deg from a benchmark temp, the unit activates until the water temp passing the prob rises to the preset temp.
What am I looking for?

Thx
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Old 02-19-2008, 01:14 AM   #2
 
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Re: Anyone Anyone


Try and look for a PT 1000

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Old 02-19-2008, 01:50 AM   #3
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Re: Anyone Anyone


Those are just sensors. probably the one included in the kit I am looking for but this is a setup that has an internal reley that will activate a 120VAC circuit at least to 10 amps....thanks
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Old 02-19-2008, 04:39 AM   #4
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Re: Anyone Anyone


I think it's called a flux capacitor.
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Old 02-19-2008, 10:49 AM   #5
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Re: Anyone Anyone


Sounds like an Aquastat to me.

The 10A is the issue I'm finding. Most are 8A. Take a look here, see if this is what you're thinking of/looking for.

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Old 02-19-2008, 11:28 PM   #6
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Re: Anyone Anyone


D'Mand Hot water
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Old 02-20-2008, 12:05 AM   #7
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Re: Anyone Anyone


Quote:
Originally Posted by JamesNLA View Post
What am I looking for?
An Aquastat. You can get either the immersion well type or the strap-on type to control a circulator.

You can get "triple aquastats" that have high limits, burner controls, domestic hot water settings, and a variety of other gadgets. There are many flavors of Aquastats, but Double A posted a pic of the most common.

Tomorrow (well, today, now that I look at the clock) I will be installing a Honeywell T991A proportional control, which is sorta like an aquastat. It controls a mod motor for more precise temp control. This could be on the water line, but in my case we'll have that mod motor connected to the burner's gas valve for fully modulating burner control.

Last edited by mdshunk; 02-20-2008 at 12:09 AM.
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Old 02-20-2008, 01:00 AM   #8
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Re: Anyone Anyone


MD, have you ever run across one that was rated for 10A, 120VAC?
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Old 02-20-2008, 01:53 AM   #9
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Re: Anyone Anyone


Unreal MD....That is what my controls supplier was telling me to go with, the T991A - 1186.

Yes, it's a stat none the less, but more accurate than the crappy Grundfos Bi-metal switch that needs 15 minutes to change to open / closed.

That setup that we all have seen on a recirculation line DOES NOT work for tankless. I need a more accurate / faster responce time to tell my timmer to shut off before the recirc pump is putting 120 degree water back into the cold inlet and causing the tankless to stop working....yet the pump is still running. So I wanted to do something like that T991A BUT I wanted the style with the probe that is actually in contact with the water, not a clamp on style. Having never used this before the will T991A do what I want? I mainly care about the reaction time once 85-100 deg is present. The temp I am flexable on, however it's just the responce time that has this system all jacked up
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Old 02-20-2008, 01:58 AM   #10
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Re: Anyone Anyone


Quote:
Originally Posted by kgphoto View Post
D'Mand Hot water
I am a HUGE fan of these things. They are SO efficient. I have put in atleast a few dozen in both recirc lines and undersinks

anyone anyone-ct48.jpg

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