Carrier 50HE003-006, 50HJ004 Return Air Enthalphy Sensor, EconoMi$er IV Component Locations

1.Use a 4-conductor, 18 or 20 AWG cable to connect the enthalpy control to the PremierLink™ controller and power transformer.

2.Connect the following 4 wires from the wire harness located in rooftop unit to the enthalpy controller:

a.Connect the BRN wire to the 24 vac terminal (TR1) on enthalpy control and to pin 1 on 12-pin harness.

b.Connect the RED wire to the 24 vac GND terminal (TR) on enthalpy sensor and to pin 4 on 12-pin harness.

c.Connect the GRAY/ORN wire to J4-2 on PremierLink controller and to terminal (3) on enthalpy sensor.

d.Connect the GRAY/RED wire to J4-1 on PremierLink controller and to terminal (2) on enthalpy sensor.

BRACKET

HH57AC078 ENTHALPY SENSOR (USED WITH ENTHALPY CONTROL FOR DIFFERENTIAL ENTHALPY OPERATION)

HH57AC077

ENTHALPY CONTROL AND OUTDOOR AIR ENTHALPY SENSOR

C7400A1004 +

50HE,HJ

NOTE: If installing in a Carrier rooftop, use the two gray wires provided from the control section to the economizer to connect PremierLink controller to terminals 2 and 3 on enthalpy sensor.

Return Air Enthalphy Sensor

Mount the return-air enthalpy sensor (HH57AC078) in the return-air duct. The return air sensor is wired to the enthalpy controller (HH57AC077). The outdoor enthalpy changeover set point is set at the controller.

ENTHALPY CONTROLLER
			RED				S (OUTDOOR
							+	AIR
			BRN
A B C	TR	TR1			BLK			ENTHALPY
								SENSOR)
D	SO	+			RED
	SR	+					S (RETURN AIR
							+	ENTHALPY
	2	3						SENSOR)
		1		GRAY/ORN
LED						WIRE HARNESS
				GRAY/RED		IN UNIT

NOTES:

1.Remove factory-installed jumper across SR and + before connecting wires from return air sensor.

2.Switches shown in high outdoor air enthalpy state. Terminals 2 and 3 close on low outdoor air enthalpy relative to indoor air enthalpy.

3.Remove sensor mounted on back of control and locate in outside air- stream.

C06019

Fig. 25 ---Outdoor and Return Air Sensor Wiring Connections for Differential Enthalpy Control

To wire the return air enthalpy sensor, perform the following (See Fig. 25):

1.Use a 2-conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller.

2.At the enthalpy control remove the factory-installed resistor from the (SR) and (+) terminals.

3.Connect the field-supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (SR+)

terminal on the enthalpy controller. Connect the BLK wire to (S) spade connector on the return air enthalpy sensor and the (SR) terminal on the enthalpy controller.

MOUNTING PLATE

C06020

Fig. 26 ---Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

	ECONOMI$ER IV
	CONTROLLER
WIRING	OUTSIDE AIR
	TEMPERATURE SENSOR
HARNESS
	LOW AMBIENT
ACTUATOR	SENSOR

C06021

Fig. 27 ---EconoMi$er IV Component Locations

OUTDOOR

AIR HOOD

ECONOMI$ER2	HOOD
PLUG
	SHIPPING
	BRACKET

GEAR DRIVEN

BAROMETRICDAMPER RELIEF

DAMPER

C06022

Fig. 28 ---EconoMi$er2 Component Locations

Optional Economi$er IV and Economi$er2

See Fig. 27 for EconoMi$er IV component locations. See Fig. 28 for EconoMi$er2 component locations.

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