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3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
M28100
2 Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
4 Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat and mount onto wall.
M28343
Wallplate
Do not remove wallplate yet
C
C
MCR33823
Terminal
designation
If you have an older thermostat with a
sealed mercury tube, turn to page 2
for proper disposal instructions.
Wire Labels
Terminal designation
C
C
MCR31537