Connection Diagrams And Control Methods - Carrier 40MBAB Installation Instructions Manual

40MBAB: Installation Instructions

CONNECTION DIAGRAMS AND CONTROL METHODS

The air handler fan coil unit can be controlled mainly through the
following methods.
• SCENARIO #1 Wired controller (Included, optional accessory) -
KSACN1001AAA:
Non-polarity controller used to operate all functions. The wired
controller is equipped with an infrared receiver and can be used in
conjunction with the wireless controller.
For this scenario to be enabled SW1-1 must be set to the OFF positions
(Default).
L1(1) L2(2) S(3)
Fig. 54 —Control & Power Terminal on Indoor Unit (Sizes 18K,
24K, 30K, 36K) Non-Light Commercial Models
NOTE: When DIP SWITCH SW1 is set to default, the system automatically detect a the wiring method according to scenarios 1 and 2. In case
of unexpected failure, DIP SWITCH SW1 can be set according to each wiring method.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Current loop communication
Indoor unit
Wired
controller Y2
R C G Y1 B W W1W2 E DH L
Wired
controller
Current loop communication
Indoor unit
R C G Y1 Y2 B W W1W2 E DH L
R C G Y1 Y2 B W W1W2E DH L
24V Thermostat
Fig. 52 —Connection Methods for 18K-36K Residential Units
Non-polarity RS485 communication
Indoor unit
Wired
controller
R C G Y1 Y2 B W W1W2 E DH L
Wired
controller
Non-polarity RS485 communication
Indoor unit
R C G Y1 Y2 B W W1W2 E DH L
R C G Y1 Y2 B W W1W2E DH L
24V Thermostat
Fig. 53 —Connection Methods for 36K-60K Light Commercial Units
• SCENARIO #1 Wireless controller (Included):
Hand-held wireless remote provides the same functionality as the wired
controller and can be used in conjunction with the wired controller. Refer to the
Owner's Manual for the remote's operational instructions.
For this scenario to be enabled SW1-1 must be set to the OFF position
(Default).
• SCENARIO #2 Third party heat pump thermostat (Not Included):
Allows the control of the air handler via the built-in 24V interface.
To enable this scenario, SW1-1 must be set to the ON position.
Scenario 1
1 2 3
SW1
ON
1 2 3
1 2
Outdoor unit
Scenario 2
1 2 3
SW1
ON
1 2 3
1 2 3 4
Outdoor unit
Scenario 1
S1 S2
SW1
ON
S1 S2
1 2
Outdoor unit
Scenario 2
S1 S2
SW1
ON
S1 S2
1 2 3 4
Outdoor unit
Fig. 55 — Control and Power Terminal on Indoor Unit
(Sizes 36K, 48K, 60K) Light Commercial Models
21
3 4
3 4
A221168
A221169