I most agree, He nailed how my blower would work from my crude attempt to display my current wiring.Originally posted by Irascible
You're one smart mofo Mark.
After looking at 4 sets of wiring diagrams (t-stat, furnace, and 2 with the 16i) and reading notes, how in H#@@ does Trane expect a service tech to wire this thing up correctly?
I've avoided mentioning this part, but here it goes, I am a EE and have my hand in designing a few control boards like this but not for the HVAC industry. Currently I work in the rail industry. Now you know why I went with a Trane...
Mark from what youíre saying, it sounds like the wiring diagrams supplied with the 16i should be the most accurate or at least the latest? Checking this against what you said the only discrepancy I'm finding is with the jumper between Y and O in the furnace. The 16i diagram shows a jumper between R and O. I believe you said this jumper is for the Comfort-R? That being said, I would assume Comfort-R is a control function of the furnace? I'm looking at note 9 on the *UY Schematic Diagram.
"9. OPTIONAL HUMIDSTAT IS TO BE CONNECTED BETWEEN THE "R" AND "BK". FACTORY ISNTALLED JUMPER "R" TO "BK" (BK JUMPER) ON THE CIRCUIT BOARD MUST BE CUT IF OPTIONAL HUMIDSAT IS USED. THE JUMPER MUST ALSO BE CUT WHEN APPLYING AN AIRFLOW COMMAND SIGNAL TO THE "BK" INPUT SUCH AS WITH THE VARIABLE SPEED SIGNAL-ZONE AND MULTI-ZONE SYSTEM CONTROLLERS. ON SINGLE SPEED COOLING ONLY / NON-HEAT PUMP SYSTEMS, JUMPER "Y" TO "O" FOR PROPER OPERATION OF THE DELAY PROFILES AND THE HUMIDSTAT. FOR TWO COMPRESSOR OR TWO SPEED SYSTEM, JUMPER "YLO" TO "O"."
In my case, I assume I'm applying the airflow command signal to "BK"? If so, this note makes it sound like I should jumper Y to O for single speed cooling but in my case of 2-speed cooling it should be YLO to O. How about the R to O jumper shown in the 16i schematic, should this not be installed? Scratching my head here......
BTY, as an engineer, we cover our back sides with the notes. I always tell people to read all the notes before they look at the pictures. To make things worse, Trane's notes are written in fine print, very hard to read. I wonder, did their lawyers help in the writing?
Another wiring question I have. The t-stat diagram shows a factory jumper between R and RC. I assume this stays connected?
Another problem with Traneís documentation, one of the wiring schematic for the 16i indicates a ďyellow/blackĒ wire. I believe this is actually a ďyellowĒ wire? The other schematic I have for the 16i doesnít indicate a wire color.