Carrier 50TCA04-A07 appendix Economizer Systems, PremierLink CCN Bus Connections

50TC

(typically WHT) to the unit’s TB1-14 terminal. Connect the CCN (-) lead (typically BLK) to the unit’s TB1-16 terminal. See Fig. 51.

CCN Bus
	TB1	PL
+ (RED)	12	J2-1

TB1

GND (WHT) 14 J2-2

TB1

– (BLK) 16 J2-3

C08276

Fig. 51 - PremierLink CCN Bus Connections

ECONOMIZER SYSTEMS

The 50TC 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. 52 and 53 for component locations on each type. See Fig. 54 and 55 for economizer section wiring diagrams.

Both economizers use direct-drive damper actuators.

ECONOMI$ER IV

CONTROLLER

WIRING	OUTSIDE AIR
	TEMPERATURE SENSOR
HARNESS
	LOW AMBIENT
ACTUATOR	SENSOR

C06021

Fig. 52 - EconoMi$er IV Component Locations

	OUTDOOR
	AIR HOOD
ECONOMI$ER2	HOOD
PLUG
	SHIPPING
	BRACKET

GEAR DRIVEN

BAROMETRICDAMPER RELIEF

DAMPER

C06022

Fig. 53 - EconoMi$er2 Component Locations

FOR OCCUPANCY CONTROL

REPLACE JUMPER WITH

FIELD-SUPPLIED TIME CLOCK

8

7

LEGEND	Potentiometer Defaults Settings:		NOTES:
DCV— Demand Controlled Ventilation	Power Exhaust	Middle	1.	620 ohm, 1 watt 5% resistor should be removed only when using differential
	Minimum Pos.	Fully Closed		enthalpy or dry bulb.
IAQ — Indoor Air Quality
	DCV Max.	Middle	2.	If a separate field-supplied 24 v transformer is used for the IAQ sensor power
LA — Low Ambient Lockout Device
OAT — Outdoor-Air Temperature	DCV Set	Middle		supply, it cannot have the secondary of the transformer grounded.
POT— Potentiometer	Enthalpy	C Setting	3.	For field-installed remote minimum position POT, remove black wire jumper
RAT — Return-Air Temperature				between P and P1 and set control minimum position POT to the minimum
				position.

C06028

Fig. 54 - EconoMi$er IV Wiring

32