Trane Packaged system Thermostat Question - http://www.hvacmechanic.com/ Forums

Original message

scsinet

66.23.218.210

"Trane Packaged system Thermostat Question" , posted Fri 5 Mar 13:33

My company is looking to move to a new building that uses Trane rooftop units. We would like to use a third party building management system we already own to control the units.

The building management system uses standard Y/G/W/R/etc dry contact thermostats, but the Trane units use what appears to be a proprietary thermostat which connect on both the tstat and unit end with terminals numbered 1-5. I know these thermostats are designed to work directly with the microprocessor inside the units, but is there any type of "cheater board" or other such signal adapter I can use to provide basic functionality (Fan, Cool, Heat 1, Heat 2) so I can use this management system?

Thanks in advance.

Replies:

Xenos
Webmaster

67.70.16.210

"Re(1):Trane Packaged system Thermostat Questi" , posted Fri 5 Mar 17:51

Yes Trane sells an interface module for this reason.

Xenos.

The best way to escape a problem is to solve it.

SCSinet

66.23.220.54

"Re(2):Trane Packaged system Thermostat Questi" , posted Sat 6 Mar 19:17

quote:
Yes Trane sells an interface module for this reason. ...

Wonderful.

I am certainly not going to ask to dig up a part number of anything, but is there any sort of description or otherwise? I've been searching the Internet like crazy and I can't find any information on it. I'm sure if I knew even the correct name for it or where to find one I could take care of the rest myself.

Thanks for your help so far.

xenos
Webmaster

67.71.22.252

"Re(3):Trane Packaged system Thermostat Questi" , posted Sat 6 Mar 20:46

I would recommend contacting Trane with your units model number and make sure your sitting down. LOL.

Xenos.

The best way to escape a problem is to solve it.

scsinet

66.23.218.210

"Re(4):Trane Packaged system Thermostat Questi" , posted Mon 8 Mar 08:48

Yeah, I figure it's gonna be really expensive.

I've already done some dissecting and found out how to switch the fan by shorting terminals. I figure that if I can determine fixed resistor values for the temperature setpoint sliders then I might be able to use a relay toggling between two values for the varister that "reads" the temperature and home brew and interface board.

Regardless, I certainly want to check out the "right" way to do it.

Thanks for your help man.

jrbenny

12.220.29.156

"Re(5):Trane Packaged system Thermostat Questi" , posted Thu 25 Nov 09:37

If the units are Voyagers, you'll need a CTI(Conventional Thermostat Interface). If the units are Precedents, you'll need nothing additional. The CTI is built into the control board.

God is great!

Louisville

70.236.92.73

"Re(6):Trane Packaged system Thermostat Questi" , posted Fri 14 Sep 13:09

Trane parts center offered to sell me BRD-968 at $110 to interface the Voyager to Conventional Thermostat.
I may still buy it.