Step 10 --Make Outdoor-Air Inlet Adjust- ments

MANUAL OUTDOOR-AIR DAMPER -- All units (except

those equipped with a factory-inst_dled economizer) have a manual outdoor-air &tmper to provide ventilation ail:

Damper can be preset to admit up to 25% outdoor air into return-tdr compartment. To adjust, loosen secunng screws and move &tmper to desired setting, then retighten screws to secure dmnper (see Fig. 17).

25% ADJUSTABLE AIR DAMPER

/

 

 

ol

\

/I

BASE

/

UNIT

 

 

o g

÷I /

SECURING SCREWS

Fig. 17 --Standard 25% Outdoor-Air

Section Details

Step 11 --Install Outdoor-Air Hood

IMPORTANT: If the unit is equipped with the optional I

EconoMiSerIV. move the outdoor air temperature sensor I prior to installing the outdoor air hood. See the Optional EconoMiSerIV and EconoMiSer2 section for more details.

The outdoor- air hood is common to 25% air ventilation and

economizel: If EconoMiSerIV is used, all electrical connec-

tions have been made and adjusted at the factoly. Assemble and install hood in the field.

NOTE: The hood top panel, upper and lower filter retainel_, hood drain pan, baffle (size 024 and 028), and filter support bracket me secured opposite the condenser end of the unit. The screens, hood side panels, remaining section of tilter support bracket, seal strip, and hmdware are in a package located inside the return-air filter access panel (Fig. 18).

1.Attach seal strip to upper filter retainer. See Fig. 19.

2.Assemble hood top panel, side panels, upper filter retain- el: and dnun pan (see Fig. 20).

3.Secure lower filter rettuner and support bracket to unit.

See Fig. 20. Leave screws loose on size 024 and 028 units.

4.Slide bafile (size 024 and 028) behind lower filter retainer and tighten screws.

5.Ix_osen sheet metal screws for top panel of base unit

located above outdoor-air inlet opening, and remove screws for hood side panels located on the sides of the outdoor-air inlet opening.

6.Match notches in hood top panel to unit top panel screws. nsert hood flange between top panel fange and unit. Tighten screws.

7.Hold hood side panel flanges flat against unit, and install screws removed in Step 5.

8.Insert outdoor-air inlet screens and spacer in channel cre- ated by lower filter retainer and filter support bracket.

OUTDOOR-AIR HOOD AND

MOUNTING BRACKETS

F[_ER

PACKAGEAN[

HOOD

COMPONENTS

RETURN-AIRFILTE}

ACCESS PANEL

Fig. 18- Outdoor-Air Hood Component Location

PANEL

UPPER

 

RETAINER

PAN

SEAL;

Fig. 19- Seal Strip Location

BAFFLE

/

\

LOWER FILTER

RETAINER

HOOD SIDE

PANELS (2)

BAFFLE

. (024 TO 028 ONLY)

LOWER

FILTER

RETAINER

FILTER SUPPORT

BRACKET

HOOD DRAIN PAN

UPPER FILTER RETAINER

Fig. 20 --Outdoor-Air Hood Details

14

Page 14
Image 14
Carrier 48TJ016-028 specifications Make Outdoor-Air Inlet Adjust- ments, Securing Screws, Panel, Seal

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.