Aquastat Questions

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ssupercoolss
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Joined: Sat. Jun. 07, 2008 7:28 am

Post by ssupercoolss » Wed. Oct. 01, 2008 6:51 am

my boiler comes with what looks like a really complicated aquastat that controls the temp in the boiler only. the nice thing about this aquastat it has an overheat function that I am going to use to turn the circulator on to dump heat. so I will need another aquastat, one I can hook my thermostat up to to turn the circulator on. I would also prefer that the circulator only come on above XXX temp, so when I let the fire die out, the circulator shuts off. what aquastat should I use for my thermostat? and.....how do I wire the circuator, that will get power from one of two sources? I would think I need some type of relay or something to prevent current from backfeeding.

 
Matthaus
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Joined: Mon. Oct. 02, 2006 8:59 am
Location: Berwick, PA and Ormand Beach FL

Post by Matthaus » Wed. Oct. 01, 2008 7:54 am

Not sure what you have there, but if you need advice we need some details, make model, etc. :)

On wiring two power sources to a circulator, generally it will be controlled by a relay from each source already so one will be open when the other is closed. It sounds like you have specific desires for the design, just do a search on the Honeywell instructions and select the unit that meets your needs.

Also what kind of boiler, most provide suggested control schemes, I think that merits a look. :D


 
ssupercoolss
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Posts: 40
Joined: Sat. Jun. 07, 2008 7:28 am

Post by ssupercoolss » Wed. Oct. 01, 2008 8:45 am

its a Harman sf-160. the instructions are non-existant for wiring in a thermostat. the only wiring diagram I see on-line is the one for boiler control. twice in the instructions they tell you the aquastat included is for maintaning temp in the boiler, don't hook a thermostat up to it. you will need another aquastat. nice, huh?

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