Honeywell T991B reset control

Nick W

Good Day All,
Has anyone ever seen or worked with this control?If so could you please give me some info on how it works,applications it fits,where it might not.I ask this of you because I am pressed for time [all of us are] and do not want to pour through Honeywell catalogs.Thank you all for your help.GO RED SOX!!!
Joe Peretti

BillW@honeywell

T991B

> Good Day All, Has anyone ever seen or worked

> with this control?If so could you please give me

> some info on how it works,applications it

> fits,where it might not.I ask this of you because

> I am pressed for time [all of us are] and do not

> want to pour through Honeywell catalogs.Thank you

> all for your help.GO RED SOX!!!

> Joe Peretti



It's an older style commercial outdoor air temp reset control. It has two capillary tubes with bulb sensors, one for the water temp, one for the outside air temp, and the various model numbers have different length cap tubes. They are used with reversing, proportional control (Honeywell 900 series) motors, and a three-way mixing valve. For a tech sheet, go to customer.honeywell.com, go to the "literature box" in the lower right side, and type in the part number for atech sheet as a pdf file. Hope this helps.

BillW@honeywell

T991B

It's an older style commercial outdoor air temp reset control. It has two capillary tubes with bulb sensors, one for the water temp, one for the outside air temp, and the various model numbers have different length cap tubes. They are used with reversing, proportional control (Honeywell 900 series) motors, and a three-way mixing valve. For a tech sheet, go to customer.honeywell.com, go to the "literature box" in the lower right side, and type in the part number for atech sheet as a pdf file. Hope this helps.