Carrier 48AJ installation instructions 48-1104, 48-1105, A48-4328, A48-8499, 48-1110

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HOOD TOP

HOOD SIDE

48-1104

Fig. 26 — Adding Seal Strip to Back of Hood Top

Mounting Flange

GRAY FOAM STRIP

CROSS MEMBER

48-1105

Fig. 27 — Adding Foam Strip to Cross Member

BLOCKOFF BAFFLE

GRAY FOAM STRIP

a48-4328

Fig. 28 — Adding Seal Strip to Block-Off Baffle

MOUNTING ANGLE

FILTER TRACK

ASSEMBLY

a48-8499

Fig. 29 — Mounting Angle Attached

to Filter Track Assembly

BLACK SEAL STRIP (CENTERED)

FILTER COVER

48-1110

Fig. 30 — Attaching Seal Strip to Filter Cover

Step 10 — Position Power Exhaust/Barometric Relief Damper Hood — All units are shipped with the hoods folded inside the unit in a shipping position. For 48AJ, and AK units the hood must be tilted out once the unit is in- stalled. On 48AW, AY units, (designed for horizontal supply and return) the assemblies will have to be relocated to return ductwork. See Fig. 31 for dimensions and details.

All electrical connections have been made and adjusted at the factory. The power exhaust blowers and barometric relief dampers are shipped assembled and tilted back into the unit for shipping. Brackets and extra screws are shipped in shrink wrap around the dampers. If ordered, each unit will have 4 (48AJ,AK,AW,AY020-050 units) or 6 (48AJ,AK,AW,AY051 and 060 units) power exhaust blowers and motors or baromet- ric relief dampers.

1.Remove 9 screws holding each damper assembly in place. See Fig. 32. Each damper assembly is secured with 3 screws on each side and 3 screws along the bottom.

Save screws.

CAUTION

Be careful when tilting blower assembly. Hoods and blow- ers are heavy and can cause injury if dropped.

2.Pivot each damper assembly outward until edges of damper assembly rest against inside wall of unit.

3.Secure each damper assembly to unit with 6 screws across top (3 screws provided) and bottom (3 screws from Step 1) of damper.

4.With screws saved from Step 1, install brackets on each side of damper assembly.

5.Remove tape from damper blades.

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Contents Installation Instructions Instructions on Make Unit Duct ConnectionsRoof Curb 48AJ,AK020-035 Units Roof Curb 48AJ,AK036-050 Units Roof Curb 48AJ,AK051 and 060 Units A48-8235 Base Unit Dimensions 48AJ,AK020-035A48-8236 Base Unit Dimensions 48AJ,AK036-050Base Unit Dimensions 48AJ,AK051 A48-8380 Base Unit Dimensions 48AW,AY020-035Base Unit Dimensions 48AW,AY036-050 A48-8240 Base Unit Dimensions 48AW,AY051A50-8102 Center of Gravity and Weights 48AJ,AK,AW,AY051,060Compressor Physical Data 48AJ,AK,AW,AY Units035 036 040 041 Nominal Capacity tons 050 051 060 Nominal Capacity tons A48-8246 Rigging InformationUnit Operating Weights Option and Accessory WeightsConstant Volume Fan Motor Weights Air Distribution Thru-the-Bottom Evaporator Fan Motor DataA48-3712 Install Flue HoodA48-3823 A48-3714Make Electrical Connections 48A Series Staged Gas ControlA48-2524 Unit Voltage 48A Min Max 46.2 203.6 225 Unbalanced 3-Phase Supply Voltage FLA MCA Electrical Data 48AJ,AK,AW,AY Units with Convenience Outlet030 040 Hacr Size Stage A48-6854 A48-8243Color Code Recommendations CCN Connection Approved Shield CableAdding Seal Strip to Top of Hood Sides Make Outdoor-Air Inlet Adjustments48-1105 48-1104A48-4328 A48-8499Route VAV Static Pressure Sensors A48-8244A48-3808 Pressure Transducer Locations Field ModificationsA48-8245 Side Return Air Conversion
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48AJ 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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