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Carrier Enterprise South Central Technical Support

Carrier, Bryant and Payne Technical Training and Support

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Crossover Wiring Selection Tool

Indoor Unit Type? *

40MUAA
Fan Coil (Single Speed)
Fan Coil (Variable Speed)

40MUAA Indoor Control? *

24V
KSACN1001AAA

Fan Coil Indoor Control? *

24V

KSACN1001AAA Controller is only Compatable with 40MUAA Air Handler

Wiring Options at Outdoor Unit? *

24V
S1S2 (RS485) – Communicating

Thermostat Conductor? *

5 Wire
8 Wire

5 Wire Thermostat connection not recommended. No supplemental heat for defrost. Unit will blow cold air during defrost.

Electric Heat? *

Yes
No

5 Wire Thermostat connection not recommended. No supplemental heat for defrost. Unit will blow cold air during defrost.

Dehumidification? *

Yes
No

Wiring Diagram Link

Scenario 1, 5 Wire No Electric Heat 1C, 1H

Wiring Diagram Link

Scenario 1, 6 Wire Electric Heat 1C, 2H

Wiring Diagram Link

Scenario 1, 6 Wire No Electric Heat 2C, 2H

Wiring Diagram Link

Scenario 1, 7 Wire Electric Heat 2C, 3H

Wiring Diagram Link

Scenario 1, 7 Wire No Electric Heat 2C, 2H, De-Hum

Wiring Diagram Link

Scenario 1, 8 Wire Electric Heat 2C, 3H, De-Hum

Wiring Diagram Link

Scenario 3, 5 Wire No Electric Heat 1C, 1H

Wiring Diagram Link

Scenario 3, 6 Wire Electric Heat 1C, 2H

Wiring Diagram Link

Scenario 3, 8 Wire Electric Heat 2C, 3H, De-Hum

Wiring Diagram Link

Scenario 3, 7 wire Electric Heat 2C, 3H

Wiring Diagram Link

Scenario 3, 7 wire No Electric Heat 2C, 2H, De-Hum

Wiring Diagram Link

Scenario 3, 6 Wire No Electric Heat 2C, 2H

Wiring Diagram Link

Scenario 3, 6 wire Electric Heat Fan Coil Single Fan speed 1C, 2H

Wiring Diagram Link

Scenario 3, 7 wire Electric Heat Fan Coil Single Fan speed 2C, 3H

Wiring Diagram Link

Scenario 3, 8 wire Electric Heat Fan Coil Single Fan speed 2C, 4H

Wiring Diagram Link

Scenario 3, 6 wire Electric Heat Fan Coil Variable Fan speed 1C, 2H

Wiring Diagram Link

Scenario 3, 7 wire Electric Heat Fan Coil Variable Fan speed 2C, 3H

Wiring Diagram Link

Scenario 3, 8 Wire Electric Heat Fan Coil Variable Fan speed 2C, 3H, De-Hum

Wiring Diagram Link

Scenario 3, 8 Wire Electric Heat Fan Coil Variable Fan speed 2C, 4H

Dip Switch Configuration

Scenario 1, 24V IDU, S1S2 ODU

Dip Switch Configuration

Scenario 3 24V Control Dip Switches

Dip Switch Configuration

Scenario 3 24V Control Dip Switches With Fan Coil

Wiring Diagram Below

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