Filter
Top Products
32
(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 m ay be equipped with a factory--installed
or accessory (field--i nstalled) economizer system. Two
types are available: with a logic control system
(EconoMi$er IV) and without a control system
(EconoMi$er2, for use with externa l 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$ER IV
CONTROLLER
OUTSIDE AIR
TEMPERATURE SENSOR
LOW AMBIENT
SENSOR
A
CTUATOR
WIRING
HARNESS
C06021
Fig. 52 -- EconoMi$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
OA T— 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