Page 8
STEP 2 -- ELECTRICAL (Continued) -- Field Control Wiring
The following two illustrations provide examples of control wiring connections when using a non-communicating thermostat.
For examples of control wiring in complete- or partial-communicating systems, see the iComfort
®
-enabled thermostat
Quick Start Guide
which is provided with the thermostat.
Y1
O
R
W1
G
D
R
Y1
L
C
C
B
Y2
Y2
i−
W
O
i+
DS
L
T
T
W2
H
W3
H
O
C
L
Y2
DS
DH
G
R
Y1
W2
W1
1
2
5
6
Air Hander Control
ComfortSense
[
7000 Thermostats
Catalog # Y0349 or Y2081
Single−Stage
Heat Pump Control
On−board link
Low voltage thermostat
wiring
Flat metal jumper
4
3
1. Thermostat
T
terminals are used for outdoor sensor input. Sensor provides input for thermostat's outdoor
temperature display (optional).
2.
R
to
L
connection is required for this model only when used with the ComfortSense
®
7000 thermostat - (catalog
number Y0349). Resistor Kit (catalog number 47W97) is required and must be ordered separately.
3. Air handler control ships from factory with metal jumpers installed across
W1
,
W2
and
W3
. For single-stage electric
heat, do not remove factory-installed metal jumper.
4. Air handler control ships from factory with metal jumpers installed across
W1
,
W2
and
W3
. For two-stage electric
heat, remove factory-installed metal jumper between
W1
and
W2.
Then,
connect thermostat wire between the air
handler control's
W2
and the thermostat's
W2
terminal.
5. Cut on-board link (clippable wire) from
R-O HEAT PUMP
for heat pump applications.
6. Cut on-board link (clippable wire)
DS-R
for Humiditrol
®
or Harmony III
applications. This will slow the indoor blower
motor to the lowest speed setting. See air handler installation instruction or product specification bulletin for lowest
fan speed information.
FIGURE 8
