Mixed Air Control

[big johnson]

I'm building a mixing box w/ return and outside air dampers. This will be a stand alone unit at a remote site. I need a simple mixed air controller that useses a remote temp sensor to modualte the dampers according to air temp set point. I'm familiar with the Honeywell enthalpy controllers but I don't care about relative humidity.

Can anyone point me in the right direction?

[Control Man]

Pneumatic or Electric , want to limit LO air or HI air temperature intake as well or just mixed air.

Had 1 a few weeks ago just wanted MIXED air no limits , last week HI OA TEMP / HUMIDITY and OA dampers 100% open

[ej45]

If you wanted simple and old school, go with Honeywell series 90 actuator and controller. Its a 135 ohm proportional control. I would get with your honeywell dealer for help picking the parts to get the correct voltage and stroke.
examples...
T991A1012 0-100 range 20 capillary tube controller
M9184A1019 modutrol motor with end swithches
Q209 manual pot for min. position

[cold in alberta]

johnson series 350 controls with a belimo damper motor

[ej45]

Originally posted by cold in alberta
johnson series 350 controls with a belimo damper motor

That would be my first choice. 350 series is a nice stand alone system

[mrhvacmechanic]

Honeywell w7210 control with 2-10 volt motors

[big johnson]

All electric controls. Don't care about hi and lo temps. It's for a rectifier sub station so not very critical control. I'll check out the Johnson stuff. I've always liked those guys.