LOW Voltage Control Connections

669997-UAI-D-1111

The 24 volt power supply is provided by an internally wired low voltage transformer which is standard on all air handler models. Field supplied low voltage wiring can exit the unit on the top right hand corner or the right hand side panel. Refer to Figure 1. Remove desired knockout and pierce foil faced insulation to allow wiring to pass through. Use as small of a hole as possible to minimize air leakage. Install a 7/8” plastic bushing in the selected hole and keep low voltage wiring as short as possible inside the control box. To further minimize air leakage, seal the wiring entry point at the outside of the unit. The field wiring is to be connected at the screw terminals of the control board.

NOTICE

All wiring must comply with local and national electrical code requirements. Read and heed all unit caution labels.

TYPICAL WIRING WITHOUT ELECTRIC HEAT

GND. LUG										GND.
										GND.
										LUG

POWER

SUPPLY

1 PHASE ELECTRIC HEAT

WITH CIRCUIT BREAKER

& BREAKER BAR REMOVED

MULTI-SOURCE (15 - 25 KW) - 25 KW SHOWN

GND. LUG	GND.
	LUG
POWER
SUPPLY 1
POWER
SUPPLY 2
POWER
SUPPLY 3
MAY BE 1, 2, OR 3
CIRCUIT BREAKERS

ELECTRIC HEAT

WITHOUT CIRCUIT BREAKER

3 PHASE (10 - 18 KW)

GND. LUG	GND.
	LUG
POWER
SUPPLY	TERMINAL
	TERMINAL
	BLOCK
ELECTRIC HEAT
WITHOUT CIRCUIT BREAKER
SINGLE SOURCE (2.5 - 10 KW)
GND. LUG	GND.
	LUG
POWER
SUPPLY
	TERMINAL
	BLOCK

CONNECT TRANSFORMER LEADS WITH WIRE NUTS (TYPICAL ALL HEAT KITS)

1 PHASE ELECTRIC HEAT WITH CIRCUIT BREAKER AS SHIPPED FROM FACTORY SINGLE SOURCE

(2.5 - 25 KW) - 25 KW SHOWN

GND. LUG									GND.
									LUG
									LUG

POWER

SUPPLY

(JUMPER BAR)

MAY BE 1, 2, OR 3

CIRCUIT BREAKERS

POWER WIRING (208/230-1-60)

FIGURE 3: Line Power Connections for PSC Motors

TYPICAL WIRING WITHOUT ELECTRIC HEAT

GND. LUG

GND.

LUG

POWER

SUPPLY

1 PHASE ELECTRIC HEAT

WITH CIRCUIT BREAKER

& BREAKER BAR REMOVED

MULTI-SOURCE (15 - 25 KW) - 25 KW SHOWN

GND. LUG

GND.

LUG

POWER

SUPPLY 1

POWER

SUPPLY 2

POWER

SUPPLY 3

MAY BE 1, 2, OR 3

CIRCUIT BREAKERS

ELECTRIC HEAT

WITHOUT CIRCUIT BREAKER

3 PHASE (10 - 18 KW)

GND. LUG	GND.
	LUG
POWER
SUPPLY	TERMINAL
	TERMINAL
	BLOCK
ELECTRIC HEAT

WITHOUT CIRCUIT BREAKER

SINGLE SOURCE (2.5 - 10 KW)

GND. LUG	GND.
	LUG
POWER
SUPPLY
	TERMINAL
	BLOCK

1 PHASE ELECTRIC HEAT WITH CIRCUIT BREAKER AS SHIPPED FROM FACTORY SINGLE SOURCE

(2.5 - 25 KW) - 25 KW SHOWN

GND. LUG									GND.
									LUG
									LUG

POWER

SUPPLY

(JUMPER BAR)

MAY BE 1, 2, OR 3

CIRCUIT BREAKERS

POWER WIRING (208/230-1-60)

FIGURE 4: Line Power Connections for Standard ECM Motors

Johnson Controls Unitary Products

AHR, AHE specifications

Johnson Controls is a leader in delivering innovative solutions for the built environment. Among its numerous offerings, the AHR (Air Handling Unit) and AHE (Air Handling Equipment) are exemplary products that showcase the company’s commitment to efficiency, sustainability, and performance.

The AHR units are designed to handle large volumes of air, making them ideal for commercial and industrial applications. They are equipped with advanced technologies that enhance their operational efficiency, such as variable speed drives, high-efficiency fans, and heat recovery systems. These features allow for precise air flow control while minimizing energy consumption.

One of the standout characteristics of the AHR is its modular design. This allows for customizable configurations based on the specific needs of the building. Users can easily tailor the unit to accommodate varying loads and operational requirements, which ultimately leads to better performance and energy savings. The flexibility of the design also simplifies installation and maintenance, ensuring that the system remains efficient over its lifespan.

In addition, the AHE complements the AHR by providing essential components that enhance overall air handling efficiency. This equipment includes filters, coils, dampers, and fans, which are all designed to work seamlessly with the AHR units. The integration of these systems ensures optimal indoor air quality and thermal comfort, critical factors in commercial spaces.

Johnson Controls employs cutting-edge technologies, such as IoT connectivity within its AHR and AHE systems. This technology enables real-time monitoring and remote management of the air handling units. Facility managers can access performance data, diagnose issues, and implement control strategies to enhance efficiency without being physically present.

Another key feature is the emphasis on sustainability. The materials used in the construction of AHR and AHE systems are selected for their low environmental impact. Energy-efficient components reduce the carbon footprint of HVAC systems while contributing to lower operational costs for building owners.

Overall, Johnson Controls AHR and AHE units represent a perfect blend of performance, efficiency, and sustainability. With their advanced technologies and customizable features, these systems stand out as essential components in modern HVAC solutions, designed to meet the demands of today’s energy-conscious environment while ensuring optimal performance.

Johnson Controls AHR, AHE LOW Voltage Control Connections, Line Power Connections for PSC Motors

Models: AHR AHE