Carrier 50TCA04-A07 - Manual (Page 32)

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(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
J2-1
J2-2 GND (WHT)
12
14
TB1
J2-3 – (BLK) 16
TB1
TB1 PL
+ (RED)
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$ER IV
CONTROLLER
OUTSIDE AIR
TEMPERATURE SENSOR
LOW AMBIENT
SENSOR
ACTUATOR
WIRING
HARNESS
C06021
Fig. 52 -- EconoMi$er IV Component Locations
ECONOMI$ER2
PLUG
BAROMETRIC
RELIEF
DAMPER
OUTDOOR
AIR HOOD
HOOD
SHIPPING
BRACKET
GEAR DRIVEN
DAMPER
C06022
Fig. 53 -- EconoMi$er2 Component Locations
FOR OCCUPANCY CONTROL
REPLACE JUMPER WITH
FIELD-SUPPLIED TIME CLOCK
LEGEND
DCV— Demand Controlled Ventilation
IAQ — Indoor Air Quality
LA — Low Ambient Lockout Device
OAT — Outdoor-Air Temperature
POT — Potentiometer
RAT — Return-Air Temperature
Potentiometer Defaults Settings:
Power Exhaust Middle
Minimum Pos. Fully Closed
DCV Max. Middle
DCV Set Middle
Enthalpy C Setting
NOTES:
1. 620 ohm, 1 watt 5% resistor should be removed only when using differential
enthalpy or dry bulb.
2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power
supply, it cannot have the secondary of the transformer grounded.
3. For field-installed remote minimum position POT, remove black wire jumper
between P and P1 and set control minimum position POT to the minimum
position.
8
7
C06028
Fig. 54 -- EconoMi$er IV Wiring
50TC