19
69-2805ES—03
Installing your thermostat
Alternate wiring key (heat pump system only)
Leave metal jumper between
R
and
RC
terminals in place.
If your old thermostat had both
V
and
VR
wires, check wifithermostat.com for help.
If your old thermostat had separate
O
and
B
wires, attach the
B
wire to the
C
terminal. If
another wire is attached to the
C
terminal, check wifithermostat.com for help. Attach the
O
wire
to the
O/B
terminal. Set System Function 0190 to 0 (see page 55).
If your old thermostat had an
O
wire and not a
B
wire, attach the
O
wire to the
O/B
terminal.
If your old thermostat had separate
Y1
,
W1
and
W2
wires, check wifithermostat.com for help.
This is the system monitor. If the monitor finds a problem, you will see a red light in the upper
right corner of the thermostat (shines through the cover).
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.
Do not use
K
terminal. For future use.
2
3
1
4
5
6
7