EnvisionIT

Only thing I can think of is the Aprilaire 5000 filter. It is wired to activate when the airhandler is on.

Connecting Red and Brown lights up the stat. I went ahead and connected the remaining wires, set the unit to 75deg cold cycle. Came back in 30 min and temp in the room is 85deg, hot, it was 78 or so to start. So it not working as expected. Current Configuration: Red = 24R Brown = 24COM Green = G Yellow = Y1 Orange = Y2 Blue = O/B I'm gonna disconnect the stat at this time since it is def not working as expected. I did find another link to an installer manual for the carrier stat, but I do not see anything specifically wrong with the wires as I have them connected. http://www.utcccs-cdn.com/hvac/docs/1009/Public/01/TP-PRH-10SI.pdf I added a picture of the original stat configuration on the original post

Ok got a flashlight and double checked. 1. Red Wire is connected to RH not RB 2. Yellow wire is connected to Y1/W2 I do NOT have a humidifier on the system. I do have Aux Heat, i.e. heat bars in the systems. I believe I have 2 stage cooling, not positive, but remember discussing it with builder. I found the following guide for commercial installations, i'm in a house but it shows the exact thermostat I have and the correct naming of the terminals http://www.utcccs-cdn.com/hvac/docs/1009/Public/0F/TP-PRHB-01SI.pdf On the right side i have the following labels: RC RH Red W/W1 G Green Y/Y2 Orange C Brown O/W2/B Blue Y1/W2 Yellow Left side OAT White RRS SRTN Black HUM D1 Red Connected from RH D2 V+ VG

Also, I do not have the Infinity series, I have the Performance series Carrier Units.

Yes each one of the systems has a zone controller box. White box with led's on it next to the air handlers. I'm not sure I have slave stats. All of the 5 stats in the house look identical and can each turn on / off the A/C. Each has their own programming, on / off times and temp.

Bought the new Insteon Heat Pump Thermostat 2732-242 I have a Carrier AC/Heat Pump (no furnace) system. I have 2 units in a multi zone system, i.e. one air handler has 2 zones, and the other air handler is a 3 zone system, so I have 5 thermostats in the house. I opened one of the thermostats on the 3 zone system, and the wires are as follows: Red - RH (plus there is a jumper wire that goes from RH to D1) Green - G Orange - Y/Y2 Brown - C Blue - O/W2/B Yellow - Y1/W2 White - OAT Black - SRTN On the 2732 I see the following: 24VCOM 24RH O/B AUX G Y1 Y2 I assume the following connections: Red (RB) - 24VCOM Blue (O/W2/B) - O/B Green (G) - G Yellow (Y1/W2) - Y1 Orange (Y/Y2) - Y2 Not sure what to place in AUX or what do to with all the other wires on the original Carrier Thermostat. The current model of Carrier Thermostat I have is: http://www.carrier.com/residential/en/us/products/thermostats/tp-prh01-b/ Will the Insteon thermostat work in a multi zone environment like I have? Anyone have any thoughts on the connections? Thanks.