Honeywell RTH8500 User Manual page 12

Installing your thermostat
3 Label wires.
Do not label by wire color.
the supplied sticky tags to label
each wire as you disconnect it.
Label wires according to the old
thermostat terminal designations,
not by wire color.
Note:
If no tag matches a
terminal designation, write the
appropriate letter on a blank
sticky tag.
4 Remove wallplate.
Remove the old wallplate from
the wall after all wires have been
labeled and disconnected.
69-2715EF—07
Use
10
C
Sticky tag
Blank tags
Terminal
designation
MCR31537