Honeywell RTH9580 Wi-Fi User Manual page 17

Installing your thermostat
Wiring (Heat Pump System
continued)
c In the image on the right, check the
box next to each connection. You will
use this checklist in Step 9.
d Verify wire is firmly secured by gently
pulling on wire.
e Repeat steps a–d for all other wires.
Note:
If old thermostat has separate
wires on AUX and E, use a wire nut to
attach both wires to a separate wire.
Slide this third wire into the W2-Aux/E
terminal.
f Push any excess wire back into the
wall opening after all wires are
installed.
g Continue to page 20.
Important!
Check the box for each wire
you connect. You will need
this information in Step 9.
Labels don't match?
See alternate wiring keys
on pages 18-19.
15