Furnace Control

[

7000 Thermostats

 

 

 

ComfortSense

 

 

One−Stage

 

Catalog # Y0349 or Y2081

 

 

 

 

 

 

 

Heat Pump Control

DS

 

 

 

 

 

W

O

 

R

 

 

 

 

 

 

On−board link

 

 

3

 

G

 

 

 

 

 

L

 

 

 

 

 

 

 

 

Low voltage thermostat

 

 

 

 

W2

 

4

L

 

wiring

 

Y2

H

 

W1

 

 

 

 

 

 

Y1

DH

 

O

 

 

 

 

 

 

 

 

 

 

 

 

O

 

 

L

 

 

 

 

 

 

 

 

 

DS

R

 

H

 

 

 

 

 

 

 

 

2

C

C

 

D

 

 

 

 

 

 

 

 

Y1

 

B

 

 

 

 

 

 

 

 

 

 

Y2

 

Y2

 

 

i−

 

 

 

 

 

 

 

 

 

 

i+

G

 

Y1

1

 

 

 

 

 

 

 

R

 

 

C

 

 

 

W2

 

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.Cut on−board link W951 (clippable wire) from R−O HEAT PUMP for heat pump applications.

4.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 furnace installation instruction or engineering handbook for lowest fan speed information.

NOTE − For defrost temper with furnace, the optional 67M41 temper kit would be wired between W of from the heat pump control (A175) to the W1 of the furnace control. The kit allows for the furnace to cycle on and off during a defrost. It protects the compressor from high refrigeration pressures during defrost.

Figure 18. ComfortSense® 7000 Series Thermostat Furnace/One−Stage Heat Pump

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Lennox International Inc 506586-01, Dave Lennox Signature Collection XP17 System HEAT PUMPS Furnace Control