Carrier 48TC*D08 appendix Economi$Er Systems, EconoMi$er IV Component Locations

NOTE: See RTU-MP 3rd Party Integration Guide (or alternatively RTU-MP 3rd Party Integration Guide (or alternatively RTU-MP Controls, Start-Up, Operation, and Troubleshooting Instructions (Form 48-50H-T-2T), Appendix) for Modbus Protocol Conformance Statement.

N2

1. Verify that the BAS and controller are both set to

speak the N2 protocol. The protocol of the controller

is set via SW3 (switches 3, 4, 5, and 6). The protocol

can also be verified by getting a Modstat of the

controller through the BACview. Hit the “FN” key

and the ’.’ key at the same time to pull up a Modstat.

ECONOMI$ER SYSTEMS

The 48TC units may be equipped with a factory-installed or accessory (field-installed) economizer system. Two types are available: with a logic control system (EconoMi$er IV) and without a control system (EconoMi$er2, for use with external control systems such as PremierLink). See Fig. 71 and Fig. 72 for component locations on each type. See Fig. 73 and Fig. 74 for economizer section wiring diagrams.

Both EconoMi$ers use direct-drive damper actuators.

Scroll to the bottom of the page and there is a section
entitled	”Network Communications.”	The	active
protocol and baud rate will be shown in this section.
2. Verify that the BAS and controller are set for 9600
baud. The baud rate of the controller is set via SW3
(switches 1 and 2). The baud rate can also be verified
via the BACview by obtaining a Modstat. (See Fig.
70.)
3. Verify that the BAS is configured to speak 2-wire
EIA-485	to the controller. The BAS	may	have to

WIRING HARNESS

ACTUATOR (HIDDEN)

LOW TEMPERATURE

COMPRESSOR

LOCKOUT SWITCH

OUTSIDE AIR TEMPERATURE SENSOR (OPERATING LOCATION)

ECONOMI$ER IV

CONTROLLER

48TC

	configure jumper or DIP switches on their end.
4.	Verify that the BAS and the controller have the same
	communication settings (8 data bits, No Parity, and 1
	stop bit).
5.	Verify that the controller has a unique N2 slave
	address on the N2 bus. The controller’s N2 slave
	address is set by its rotary address switches.
6.	Verify proper wiring between the BAS and the
	controller.
7.	Verify that the BAS is reading or writing to the proper
	network point addresses on the controller. Download
	the latest points list for the controller to verify.
8.	Verify that the BAS is sending his requests to the
	proper slave address of our controller.

NOTE: See RTU-MP 3rd Party Integration Guide (or alternatively RTU-MP 3rd Party Integration Guide (or alternatively RTU-MP Controls, Start-Up, Operation, and Troubleshooting Instructions (Form 48-50H-T-2T) Appendix) for N2 Protocol Conformance Statement.

C07367

Fig. 71 - EconoMi$er IV Component Locations

	OUTDOOR
	AIR HOOD
ECONOMI$ER2	HOOD
PLUG
	SHIPPING
	BRACKET

GEAR DRIVEN

BAROMETRICDAMPER RELIEF

DAMPER

C06022

Fig. 72 - EconoMi$er2 Component Locations

57