50HCQA

TRACK

FLANGE

C08135

Fig. 25 - Typical Module Installation

Single Point Boxes and Supplementary Fuse

When the unit MOCP device value exceeds 60-A, unit-mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the outdoor section. The Single Point Box has a hinged access cover. See Fig. 26. The Single Point Box also includes pigtails to complete the wiring between the Single Point Box and the unit’s main control box terminals. Refer to the accessory heater and Single Point Box installation instructions for details on tap connections.

DEFROST

BOARD

CONTROL

BOX

BUSHING

 

SINGLE

 

POINT BOX

 

MOUNTING

 

SCREWS

 

DRIP BOOT

 

BRACKET

 

MOUNTING

 

SCREWS

 

POWER

 

WIRES

 

FOAM

 

BUSHING

 

 

22.2

23

1

3

HEATER

RELAYS

HEATER

MOUNTING

SCREWS

C08136

Fig. 26 - Typical Single Point Installation

All fuses on 50HCQ units are 60-A. (Note that all heaters are qualified for use with a 60-A fuse, regardless of actual heater ampacity, so only 60-A fuses are necessary.)

Single Point Boxes without Fuses: Refer to accessory heater and Single Point Box installation instructions for details on tap connections.

Low-Voltage Control Connections: Run the low-voltage control leads from the heater module(s) - VIO and BRN (two of each if two modules are installed; identify for Module #1) - to the 4-pole terminal board TB4 located on the heater bulkhead to the left of Heater #1. Connect the VIO leads from Heater #1 and Heater #2 to terminal TB4-1. Connect the BRN leads to terminal TB4-3. See Fig. 27.

E-HEAT ORN

P3-3 BRN

 

ORN

BRN

TB4

1

3

 

VIO

VIO BRN BRN

Field

Connections

Elec Htr

VIO HR2 BRN

VIO HR1 BRN

HR1: On Heater 1 in Position #1

HR2: On Heater 2 in Position #2 (if installed)

C09013

Fig. 27 - Accessory Electric Heater Control Connections

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Carrier 50HCQA installation instructions Single Point Boxes and Supplementary Fuse, Typical Module Installation

50HCQA specifications

The Carrier 50HCQA is a cutting-edge rooftop air conditioning unit designed for commercial applications, combining efficiency, reliability, and advanced technology to ensure optimal indoor climate control. This model stands out in Carrier's extensive range of HVAC solutions, showcasing a blend of innovative features suitable for diverse building types.

One of the key features of the Carrier 50HCQA is its high-efficiency compressor. With variable-speed capabilities, the compressor adjusts its output to meet the precise cooling or heating demands of the space, promoting energy savings and consistent temperature management. This flexibility results in reduced energy consumption, making the 50HCQA an environmentally friendly choice for businesses looking to lower their carbon footprint.

The 50HCQA integrates advanced microprocessor controls, streamlining operation and enhancing user interaction. This technology allows for sophisticated diagnostics, monitoring, and scheduling, giving facility managers the tools they need to optimize system performance. The user-friendly interface ensures that settings can be easily adjusted, and real-time performance metrics can be accessed to ensure efficient operation.

In terms of construction, the Carrier 50HCQA is built with durability in mind. The unit features a robust cabinet design with a galvanized steel construction that is resistant to corrosion. This feature enhances the longevity of the unit, making it suitable for a variety of weather conditions. Additionally, the insulated casing reduces sound levels, providing a quieter operation that is particularly beneficial in noise-sensitive environments.

Another significant characteristic of the 50HCQA is its environmentally responsible refrigerant options. It utilizes R-410A refrigerant, which has a lower Global Warming Potential (GWP) compared to traditional refrigerants. This aspect not only meets regulatory standards but also supports users in making eco-friendly choices in their HVAC systems.

The 50HCQA also supports a range of optional accessories, including economizers for enhanced energy efficiency and improved air quality. This allows for increased outdoor air intake during suitable conditions, which can significantly contribute to enhancing indoor air quality—an essential factor for occupant comfort and health.

In conclusion, the Carrier 50HCQA is an exemplary model in the commercial HVAC sector, delivering powerful performance, advanced control technologies, and robust construction. Its energy-efficient design, user-friendly controls, and eco-conscious refrigerant options make it a top choice for businesses aiming to invest in sustainable and reliable climate control solutions.