Interface for using Nest thermostats with F&C inverter
0. Contents
XMatch
Adapter Cable
1.- Installation
1.- Turn off the power to the air conditioner.
2.- Disconnect the original thermostat from the wall by unplugging the 3-wire harness. (We recommend not completely disconnecting this cable in case you want to reconnect your thermostat later.)
3.- Remove the original thermostat.
4.- Connect the 10-pin end of the adapter cable to the evaporator board.
5.- Connect the 4-pin end of the adapter cable to the XMatch.
6.- Connect the cables to the XMatch, following the indicated color code.
7.- Connect the colored wires to the 24VAC thermostat following the color code.
For heating, the OB connection should not be used, only the W.
The Nest must be configured in electric heating mode with forced air.
8.- Connect the power supply wires to the terminals of the XMatch.
9.- Turn the power back on the air conditioner.
10.- Install your thermostat, and it should turn on correctly.
