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Single Transformer versus Dual Transformer Installations
This thermostat does not need a physical jumper wire between Rc and Rh. Software in
the thermostat allows you to configure this connection. During the Guided Setup
process you will need to specify how many transformers are connected to the
thermostat. When you select One, Rc and Rh are internally jumpered. When you select
Two, Rc and Rh require their own transformer. If you connected wires to Rh and Rc
during installation, select Two. If not, select One.
Installations without a Common (C) Wire
If your current thermostat does not have a wire connected to C, the following options
are available:
1) Repurpose the G wire as a C wire per instructions below.
2) Use a Power Extender Kit (TS-2PE01). Power Extender Kit installation
instructions for Carrier contractors are available on
3) Run an additional wire from your equipment to the thermostat.
Repurposing the G wire for the C wire
– Single Stage Equipment
Repurposing G wire for the C wire will result in the loss of continuous fan operation and
air circulation features of the thermostat.
WARNING!
This is only recommended on single stage Gas, Oil or Propane Furnace
equipment applications with 4 wires running to the thermostat (R, W, Y, G) and Carrier
fan coils.
1) Use the G wire for the C wire at the equipment
Summary of Contents for TP-WEM01
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