Return Air Enthalphy Sensor

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 +

48HE,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.

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


LED						WIRE HARNESS
LED				GRAY/RED		IN UNIT
						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. 27 ---Outdoor and Return Air Sensor Wiring Connections for Differential Enthalpy Control

To wire the return air enthalpy sensor, perform the following (See Fig. 27):

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. 28 ---Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

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

C06021

Fig. 29 ---EconoMi$er IV Component Locations

OUTDOOR

AIR HOOD

	ECONOMI$ER2	HOOD
	PLUG	HOOD
	PLUG	SHIPPING
		BRACKET

GEAR DRIVEN

BAROMETRICDAMPER RELIEF

DAMPER

C06022

Fig. 30 ---EconoMi$er2 Component Locations optional economi$er IV and economi$er2

See Fig. 29 for EconoMi$er IV component locations. See Fig. 30 for EconoMi$er2 component locations.

48HJ004---007, 48HE003---006 specifications

Carrier has long been a trusted name in the HVAC industry, and its models 48HJ004---007 and 48HE003---006 continue that legacy, offering efficient, reliable climate control solutions. These models are designed for different applications, ensuring optimal performance in a variety of environments.

The 48HJ series features advanced rooftop units that are ideal for commercial settings. They come equipped with high-efficiency scroll compressors that provide superior cooling and heating capabilities. This series is noted for its compact design, allowing for easy installation on rooftops or other constrained spaces. The units offer variable capacity operation, which enables them to efficiently meet varying heating and cooling demands without unnecessary energy consumption.

One of the standout features of the 48HJ series is its use of advanced microprocessor controls. This technology allows for precise temperature management and system diagnostics, enhancing the ease of operation while ensuring maximum comfort. Additionally, the series supports advanced connectivity options, enabling integration with building management systems. This allows for remote monitoring and control, making it easier for facility managers to keep track of performance and energy usage.

On the other hand, the 48HE series specializes in high-efficiency heating and cooling performance. These units are designed for larger commercial spaces and come with robust features for enhanced durability and efficiency. Like the 48HJ series, the 48HE models utilize scroll compressors and are equipped with a high-efficiency fan setup for improved airflow and reduced noise levels.

The 48HE also includes an innovative heat pump option, which allows the system to reverse the cooling process to provide heating, making it versatile across different seasonal demands. Both series are designed with eco-friendly refrigerants that comply with the latest environmental regulations, ensuring a minimized ecological footprint.

In terms of energy efficiency, both the 48HJ and 48HE series hold impressive SEER and EER ratings, contributing to reduced operational costs over time. The units are also built with durable, corrosion-resistant materials, ensuring longevity and low maintenance needs.

In conclusion, Carrier 48HJ004---007 and 48HE003---006 models are designed with cutting-edge technology, energy efficiency, and flexibility in mind. Their robust features make them ideal choices for commercial applications, providing reliable comfort and operational excellence. Whether for cooling or heating, these systems stand out in performance and sustainability, earning Carrier's reputation as a leader in the HVAC market.

Carrier 48HE003---006 Return Air Enthalphy Sensor, EconoMi$er IV Component Locations

Models: 48HJ004---007 48HE003---006

48HE,HJ