NOTES:

1.Unless otherwise specified, all dimensions are to outside of part.

2.Dimensions are in inches.

3.On 48AW,AY and 48EW,EY units, accessory barometric relief or power exhaust must be mounted in the field-supplied return ductwork.

Fig. 50 — Barometric Relief Damper and Power Exhaust Mounting Details

LEGEND

VAV — Variable Air Volume

Fig. 51 — Pressure Transducer Locations

(48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068)

Step 12 — Install All Accessories — After all the factory-installed options have been adjusted, install all field-in- stalled accessories. Refer to the accessory installation instruc- tions included with each accessory.

MOTORMASTER® III CONTROL INSTALLATION

Install Field-Fabricated Wind Baffles — Wind baffles must be field-fabricated for all units to ensure proper cooling cycle operation at low-ambient temperatures. See Fig. 52 for baffle details. Use 20-gage, galvanized sheet metal, or similar corro- sion-resistant metal for baffles. Use field-supplied screws to at- tach baffles to unit. Screws should be 1/4-in. diameter and 5/8-in. long. Holes for wind baffles are pre-punched in the unit sheet metal.

To avoid damage to the refrigerant coils and electrical com- ponents, use recommended screw sizes only.

The wind baffles attach to flanges formed on the outer sheet metal of the unit corner post. The other end of the baffle is at- tached to the center panel between the condenser coil and the indoor section. Two baffles are required.

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Carrier 48AJ, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK, 48EJ Barometric Relief Damper and Power Exhaust Mounting Details
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48EJ, 48AJ, 48AK, 48EK, 48AY020-060 specifications

The Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY024-068 are cutting-edge rooftop air conditioning units designed for commercial applications. These models are renowned for their reliability, energy efficiency, and innovative technologies aimed at providing optimal indoor comfort.

One of the standout features of these units is their advanced cooling and heating capabilities. They employ a multi-stage compressor system that allows for precise temperature control, accommodating various load requirements. This flexibility is particularly beneficial in commercial settings where the cooling load can fluctuate throughout the day.

Energy efficiency is paramount in today’s environmental landscape, and Carrier has ensured that these models meet stringent efficiency standards. They incorporate high-efficiency scroll compressors, which significantly reduce energy consumption while delivering powerful performance. The units are also equipped with variable speed fans that adjust airflow based on demand, further optimizing energy use.

In terms of construction, these rooftop units feature a robust design that enhances durability and longevity. The cabinet is constructed to withstand harsh weather conditions, ensuring reliable performance year-round. Additionally, the units are equipped with corrosion-resistant coatings, particularly useful in coastal environments where salt exposure can be a concern.

The Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY models utilize advanced controls and connectivity features, allowing for easy integration into building management systems. This connectivity enables remote monitoring and control, facilitating quick response to changing conditions and simplifying maintenance tasks.

Noise reduction is another key characteristic of these models. They are designed with sound-absorbing insulation and low-noise fan blades to ensure quiet operation, making them suitable for noise-sensitive environments such as schools and hospitals.

These units are also available with various options for air filtration and dehumidification. The use of high-efficiency air filters enhances indoor air quality by trapping dust, pollen, and other airborne particles. Enhanced dehumidification capabilities ensure that spaces remain comfortable even in humid conditions.

In conclusion, the Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY024-068 rooftop units are engineered to offer exceptional performance, energy efficiency, and durability. With their advanced technologies and user-friendly features, they stand out as reliable solutions for meeting diverse commercial cooling and heating needs, making them a popular choice for many businesses.
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