Carrier 48TC series, Service And Maintenance Instructions, Page: 49 / 112

49
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 trans-
former 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.
Fig. 64 — EconoMi$er IV Wiring
NOTES:
1. Switch on actuator must be in run position for economizer to operate.
2. PremierLink™ control requires that the standard 50HJ540569 out -
side-air sensor be replaced by either the CROASENR001A00 dry
bulb sensor or HH57A077 enthalpy sensor.
3. 50HJ540573 actuator consists of the 50HJ540567 actuator and a
harness with 500-ohm resistor.
Fig. 65 — EconoMi$er2 with 4 to 20 mA Control Wiring
FOR OCCUPANCY CONTROL
REPLACE JUMPER WITH
FIELD-SUPPLIED TIME CLOCK
8
7
LEGEND
DCV — Demand Controlled Ventilation
IAQ — Indoor Air Quality
LA — Low Ambient Lockout Device
OAT — Outdoor Air Temperature
POT — Potentiometer
RAT — Return Air Temperature
4
3
5
2
8
6
7
1
10
11
9
12
PINK
VIOLET
BLACK
BLUE
YELLOW
RUN
RED
WHITE
ECONOMI$ER2 PLUG
DIRECT DRIVE
ACTUATOR
4-20mA SIGNAL
OAT SENSOR
ACTUATOR
CONTROL
(4-20mA)
ACTUATOR
FEEDBACK
(2-10VDC)
TRANSFORMER
GROUND
ORANGE
500 OHM
RESISTOR