STEP 5 −− 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 icomfortt−enabled thermostat Quick Start Guide which is provided with the thermostat.

 

Air Handler

 

 

 

 

 

ComfortSense[ 7000 Thermostats

 

7

 

Catalog # Y0349 or Y2081

 

 

 

 

XC21 Two−Stage

DS

 

 

 

 

 

 

Air Conditioner Control

 

 

 

R

 

W

O

G

 

 

 

On−board link

 

 

 

 

 

L

 

W2

Low voltage thermostat

 

 

 

 

 

 

L

 

wiring

 

Y2

H

W1

Flat metal jumper

 

 

 

 

 

 

Y1

DH

O

 

 

 

 

 

 

 

 

 

O

 

L

 

 

 

 

 

 

DS

R

H

 

 

 

 

 

 

 

 

2

C

C

D

 

 

 

 

 

 

 

Y1

B

 

 

 

 

 

 

 

5

 

 

 

6

Y2

Y2

 

 

 

 

1

 

 

 

 

 

 

G

Y1

 

 

R

W3

C

 

 

3

W2

 

 

 

 

4

T

 

 

 

W1

T

 

 

 

 

 

1.Thermostat T terminals are used for outdoor sensor input. Use for thermostat’s outdoor temperature display (optional).

2.R to L connection is required for this model when using the ComfortSense® 7000 − catalog number Y0349 only. Resistor Kit (catalog number 47W97) required and ordered separately.

3.Air handler control ships from factory with metal jumpers installed across W1, W2 and W3. For one−stage electric heat, do not remove factory installed metal jumpers.

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 to 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 Y1−Y2 2 STAGE COMPR for two−stage compressor and two−speed fan operation.

6.Cut loop jumper (clippable wire) DS to R on two−stage units for Humiditrol® applications. This will slow the outdoor unit’s fan speed to a specific RPM. A wire must be installed between the DS terminals on the air handler and outdoor unit controls.

7.Cut on−board link (clippable wire) DS−R for Humiditrol® or Harmony IIIt applications. This will slow the indoor blower motor to the lowest speed setting. See air handler installation instruction or engineering handbook for lowest fan speed information.

FIGURE 15

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Image 14
Lennox International Inc XC21 installation instructions Electrical −− Field Control Wiring, Flat metal jumper

Dave Lennox Signature Collection XC21 System, XC21 specifications

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