30
POWERING THE THERMOSTAT
Wiring 24VAC Common
·Single-Transformer System:
Connect the common side of the transformer to the C screw terminal of the thermostat wall
plate. Leave the metal jumper wire in place between RC and R.
·Two-Transformer System:
Connect the common side of the cooling transformer to the C screw terminal of the
thermostat wall plate. Remove the metal jumper wire between RC and R.
Mount Thermostat to Wall Plate
Align the terminal screw blocks with the pins on the back of the thermostat. Push the
thermostat straight onto the wall plate until it snaps into place. See Fig. 21.
Summary of Contents for MST03
Page 1: ...MRCOOL Universal WiFi Thermostat...
Page 2: ......
Page 4: ......
Page 11: ...7 Fig 1 Thermostat Dimensions in inches mm...
Page 12: ...8 Fig 2 Thermostat back case dimensions in inches mm...
Page 13: ...9 Fig 3 Thermostat cover plate dimensions in inches mm...
Page 14: ...10 Fig 4 Selecting thermostat location...
Page 16: ...12 Fig 5 Mounting wall plate...
Page 20: ...16 Fig 7 Inserting wires in terminal block IMPORTANT Use 18 gauge thermostat wire...
Page 35: ...31 Fig 21 Mount thermostat to wall plate...
Page 48: ...44 OPERATION Fig 23 Thermostat Keys Fan Choose fan mode...
Page 49: ...45 Fig 24 Thermostat Display...
Page 64: ...60 Fig 33 Fig 34 4 Press the key on thermostat screen until the flash Fig 35...
