Honeywell RTH8580ZW User Manual page 10

Installing your thermostat
Alternate wiring (heat pump system only)
Use this if your wire labels don't match the terminal labels.
Note:
You must have
a C wire or equivalent.
See page 5.
Alternate wiring key (heat pump system only)
1
Leave metal jumper between R and RC terminals in place.
2
If your old thermostat had both V and VR wires, check yourhome.honeywell.com for help.
If your old thermostat had separate O and B wires, attach the B wire to the C terminal. If
3
another wire is attached to the C terminal, check yourhome.honeywell.com for help. Attach the
O wire to the O/B terminal. Set System Function 0190 to 0 (see page 18).
If your old thermostat had an O wire and not a B wire, attach the O wire to the O/B terminal.
4
If your old thermostat had separate Y1, W1 and W2 wires, check yourhome.honeywell.com for
help.
This is the system monitor. If the monitor finds a problem, you will see a red light in the upper
5
right corner of the thermostat (shines through the cover).
Do not use K terminal. For future use.
6
8 Remove battery tab.
The thermostat is shipped
from the factory with the
coin cell installed. To keep
the battery from discharging
during shipment and storage,
the thermostat is shipped with
a plastic tab inserted in the
battery holder.
Simply pull the plastic tab out
of the battery tray. Make sure
that the battery tray is fully
inserted into the thermostat.
33-00131ES—01
Y2
Y2
5
L
5
E
6
AUX
7
AUX
6
K
8
HEAT PUMP
Metal Jumper
RC
R
O
Y
G
C
Remove tab.
1
RC 1
2
R 2
3
O/B
3
4
Y 4
G
3
3
C
MCR35010
MCR33530A