Honeywell RTH8500D Owner's Manual page 18

Step 7. Connect Wires to New Wallplate (Cont)
NOTES FOR CONVENTIONAL HEATING AND COOLING SYSTEMS
1 If wires will be connected to both R
remove metal jumper wire between R
wire in place if only one of the terminals, R
on the new thermostat.
If wires were connected to both R and RH terminals on the old
2
thermostat, remove metal jumper wire between R
new thermostat. Connect the old R to the new R
to the new R.
3
If two C and/or C1 wires were connected to the old thermostat, do
not connect them to the new thermostat. Wrap the bare end of
each wire separately with electrical tape and do not use.
4
If one C and/or C1 wire was connected to the old thermostat, the
wire should be connected to the "C" letter designation on the new
thermostat.
69-1725-1
and R on the new thermostat,
C
and R. Leave metal jumper
C
or R, will be connected
C
18
and R on the
C
and the old RH
C
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