Honeywell RTH8580WF User Manual page 19

Installing your thermostat
Wiring (heat pump system only)
7B Connect wires.
Wire Wi-Fi thermostat to your heat pump.
a Match the labels on the wires to the
terminal labels on the new thermostat.
You must have a C wire. See page 15.
b Loosen screws, insert wires into holes
on inside edge of terminals, then tighten
screws.
c If old thermostat has separate wires on
AUX and E, place both wires into the
E/AUX terminal. If old thermostat has wire
on AUX with a jumper to E, place wire on
E/AUX terminal. No jumper is required.
d Push any excess wire back into the wall opening.
e Continue to page 22.
Labels don't match?
wiring key on pages 20–21.
L
E/AUX
K
17
See alternate
HEAT PUMP
Insert wires here
69-2715ES—01
RC
R
O/B
Y
G
C