INSTALLATION

Inspect unit for transportation dmnage. If &_mage is found, file claim with transportation agency.

Step 1 -- Provide Unit Support

ROOF CURB -- Assemble and install accessory roof curb or horizont_d a&tpter roof curb in accordance with instructions shipped with this accessory. See Fig. 1 and 2. Install insulation, cant strips, roofing, and counter flashing as shown. Ductwork can be installed to roof curb or horizontal adapter roof curb be- fore unit is set in place. Curb or a&tpter roof curb should be level. This is necessary to permit unit drain to function proper- ly. Unit leveling tolerance is + l/l(_ in. per linear fl in any direc- tion. Refer to Accessory Roof Curb or Horizontal A&_pter Roof Curb Installation Instructions for additional information

as required. When accessory roof curb or horizontal adapter roof curb is used, unit may be installed on class A, B, or C roof covering material.

IMPORTANT: The gasketing of the unit to the roof curb or adapter roof curb is critical for a watertight se_d. Inst_fll gasket with the roof curb or adapter as shown in Fig. 2. Improperly applied gasket can _dso result in air leaks and poor unit performance.

ALTERNATE UNIT SUPPORT -- When the curb or adapter

cannot be used, install unit on a noncombustible surface. Sup- port unit with sleepers, using unit curb support area. If sleepers

cannot be used, support long sides of unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side.

Step 2 --Rig and Place Unit --Do not diop unit;

keep upright. Use spreader bras over unit to prevent sling or cable &image. Rollers may be used to move unit across a roof. Level by using unit frame as a refelence; leveling tolerance is _+1/1_in. per linear fl in any direction. See Fig. 3 for additiomfl information. Unit operating weight is shown in Table 1.

Four lifting holes are provided in ends of unit base rails as shown in Fig. 3. Refer to rigging instructions on unit.

POSITIONING- Maintain clearance, per Fig. 4 and 5, around and above unit to provide minimum distance from combustible materials, proper airflow, and service access.

Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contmninated

all: For proper unit operation, adequate combustion and venti- lation air must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1 (American National Stan&_rds Institute).

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

Ix)cate mechanical diaft system flue assembly at least 4 ft from any opening through which combustion products could enter the building, and at least 4 ft from any adjacent building.

When unit is located adjacent to public walkways, flue assem- bly must be at least 7 ft above grade.

ROOF MOUNT-- Check building codes for weight distri-

bution requirements. Unit operating weight is shown in Table 1.

hlstructions continued on page 9.

14-3/4_

25% VENT AIR//

ECONOMIZER

HOOD

BLOCK-OFFJ___i

PAN

A,R

OUT

HORIZONTALSUPPLY/

CURB (CRRFCURB013A00)

I

TRANSITION DUCT

FULLY INSULATED

SUPPLY PLENUM

1 1/2 # DENSITY,

STICK PINNED & GLUED

NOTE: CRRFCURB013A00 is a fully factory preassembled hori- zontal adapter and includes an insulated transition duct. The pres- sure drop through the adapter curb is negligible.

For horizontal return applications: The power exhaust and baro- metric relief dampers must be installed in the return air duct.

 

12" WIDE

STANDING--

 

 

SEAM PANELS

 

ACCESSORY

CURB

DESCRIPTION

 

 

PACKAGE NO.

HEIGHT

Pre-Assembled,

Roof Curb,

 

1'-11"

CRRFCURB013A00

(584

Horizontal

Adapter

Fig. 1 --Horizontal Supply/Return Adapter Installation

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Carrier 48TJ016-028 specifications Rig and Place Unit --Do not diop unit, 14-3/4, Accessory Curb, Package no Height
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48TJ016-028 specifications

The Carrier 48TJ016-028 is a notable model in the range of packaged rooftop units designed by Carrier, a leader in heating, ventilation, and air conditioning (HVAC) solutions. Tailored specifically for commercial applications, these units provide a blend of efficiency, durability, and reliability, making them suitable for a variety of settings, including offices, retail spaces, and industrial environments.

One of the standout features of the 48TJ series is its energy-efficient performance. Equipped with high-efficiency scroll compressors, these units offer superior cooling capacity while minimizing energy consumption. This aligns with modern sustainability goals, helping businesses reduce their carbon footprint and operational costs. Additionally, the 48TJ units comply with stringent industry standards, such as the ASHRAE 90.1 energy efficiency guidelines, ensuring that users receive a product that meets modern energy performance benchmarks.

The 48TJ016-028 units also include advanced technologies that enhance performance and user comfort. The inclusion of a sophisticated microprocessor control system facilitates precise temperature regulation, allowing for an optimal balance of cooling and heating based on real-time conditions. Moreover, the user-friendly controls make it easy for facility managers to monitor system performance and make adjustments as necessary.

Another notable characteristic of the 48TJ series is its flexible installation options. These rooftop units are designed for easy integration into existing building structures and can be installed on flat or pitched roofs. Their compact design and lightweight construction simplify the installation process while minimizing structural impacts on buildings.

Durability is paramount in the design of the 48TJ units as well. The cabinets are constructed from high-quality materials with corrosion-resistant coatings, ensuring a long lifespan even in harsh environmental conditions. The systems are also equipped with robust insulation to reduce sound levels and improve overall operating efficiency.

Furthermore, the Carrier 48TJ016-028 units offer various options for customization. Users can choose from different airflow configurations, heating options, and accessories, allowing for tailored solutions that meet specific requirements. Whether you are looking for a unit with enhanced filtration, economizer capabilities, or advanced humidity control, the 48TJ series provides the flexibility needed for diverse applications.

In summary, the Carrier 48TJ016-028 units deliver a compelling combination of energy efficiency, advanced technology, and robust construction, making them an ideal choice for commercial HVAC needs. With their versatile features and customizable options, they stand out as reliable solutions for maintaining comfortable indoor environments.
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