Heya!

I am really happy I stumbled upon this forum today! I'm a new home owner so I am looking forward to frequenting this site regularly.

After dealing with a horrid-made LUX that likes to cut off for no reason, (and now the a/c stays on permanently), I bought a HAI Omnistat 2 to replace it with. I am not going to use the dehumidifier/humidifier or zoning options now. I will be using this unit for just its normal thermostat abilities.

Let me give you a rundown of the equipment...

Inside unit -- Trane model # TWE042C140B1

Outside unit -- Trane High Effeciency Weathertron Heat Pump XE 1000 # TWR042C100B2

LUX HP2110 Thermostat (to be replaced) Link

W3 -- Unused
E -- Black Wire
G -- Green Wire
Y -- Yellow Wire
R -- Red Wire
O -- Orange Wire
W2 -- White Wire
B -- Unused
L -- Unused

Two wires are unused, Brown & Blue.

Omnistat 2 Thermostat (to be installed) Link

This is how the diagram looks in the installation instructions for the Heat Pump (2 Stage Heat / 1 Stage Cool)...

[Dehumidifier (D)]--------------[Dehumidifier]---------|
[Humidifier (H)]----------------[Humidifier]------------|
[Ground Fault (L)]--------------[Fault Relay]--------------(loops into 24VAC ctrl trns)
[Fan (G)]----------------------[Fan Relay]------------|
[Compressor (Y1)]--------------[Compressor Relay]----|
[Energized in Heat (B)]----
[Energized in Cool (O)]----------[Reversing Valve]------|
[Auxilirary Heat (W2)]-----------[Aux Heat Relay]------|
[24VAC Common* (C)]---------------------------------|
[24VAC "HOT" (RC)]----------------------------(loops into 24VAC ctrl trns)


So.... How should I wire this thing?

 

Never done this stat before.... So hope I got it for you.

Old-------------------------New
E -- Black Wire----------H
G -- Green Wire---------G
Y -- Yellow Wire-------Y1
R -- Red Wire-----------R
O -- Orange Wire-------O
W2 -- White Wire------W2


Set up menu..

System type- HP
Program mode- None (HP are best to set it and forget it)
Cool stages-1
Heat stages-3 (if 3 don't work then 2)
Humidifier Output- EM Heat

 

looks like you will need an extra wire run for 24V Common. Which model of omnistat 2 do you have exactly?

 

You guys rule indefinitely.

I'm figuring everything you said, Jay, is probably 100% with the possible addition of hvac's mod?

I won't wire until we get this figured out...

I apologize for not being specific enough about the thermostat. It is a RC-2000WH.

Can I just extend the unused blue or brown to the 24V Common? I've no idea what this might entail, so I'd have to get a rundown of what it's involving...

Thanks so much, so far!!!

 

Yes, use the blue wire and hook that up to C at the stat, and C (If C is not seen then B) at the air handler.