OPTIONAL DURABLADE ECONOMIZER — The op- tional economizer hood assembly is packaged and shipped in the filter section. Damper blades and control boards are in- stalled at the factory and the economizer is shipped in the verti- cal discharge position.

NOTE: Horizontal discharge block-off plate is shipped with the air hood package. If unit is to be used for vertical discharge application, discard this plate.

Assembly:

1.Determine if ventilation air is required in building. If so, determine minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 6.

2.Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track and can be removed. No tools are required to remove filter access panel. Remove outdoor-air opening panel. Save panels and screws. See Fig. 16. Remove optional outdoor-air damper hood package from filter section.

3.Assemble outdoor-air hood top and side plates as shown in Fig. 17. Install seal strips on hood top and sides. Put aside screen retainer and screws for later assembly. Do not attach hood to unit at this time.

4.To convert to horizontal discharge application:

a. Rotate economizer 90 degrees until the economizer motor faces the condenser section (see Fig. 18).

b. Rotate the barometric relief damper hinge 90 degrees. Barometric relief damper should open vertically to operate properly.

c.Install horizontal discharge block-off plate over the opening on the access panel. (Block-off plate MUST be installed before installing hood assem- bly.) See Fig. 19.

5.Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 20.

6.If ventilation air is not required, proceed to Step 7. If ven- tilation air is required, determine minimum position set- ting for required airflow. See Fig. 21. Adjust minimum position setting by adjusting the screws on the position setting bracket. Slide bracket until the top screw is in the position determined by Fig. 21. Tighten screws.

7.Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips pro- vided. See Fig. 22. Make sure OAT terminals are posi- tioned up.

8.Replace outdoor-air opening panel using screws from Step 2. Replace filter access panel. Ensure the filter ac- cess panel slides along the tracks and is securely engaged.

9.Fasten hood top and side plate assembly (Fig. 17) to outdoor-air opening panel with screws provided.

10.Place knob supplied with economizer on OAT. See Fig. 22. Set for 3° F below indoor room thermostat set- ting. If accessory enthalpy control (EC) is used in place of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 22.

11.Connect OAT per Fig. 23.

12.Slide outdoor-air inlet screen into screen track on hood side plate. While holding screen in place, fasten screen re- tainer to hood using screws provided.

NOTE: Refer to Fig. 24 for economizer barometric relief damper characteristics.

Fig. 16 — Typical Access Panel Locations

Fig. 17 — Outdoor-Air Hood Details

ECONOMIZER CONTROL BOARD

BAROMETRIC

RELIEF

DAMPER

ECONOMIZER

PLUG

SHIPPING

SCREW

ECONOMIZER

MOTOR

Fig. 18 — Horizontal Durablade Economizer

Installation

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Carrier 48TF004-007 specifications Typical Access Panel Locations
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48TF004-007 specifications

The Carrier 48TF004-007 is part of the brand's renowned rooftop unit series, designed to deliver efficient, reliable performance for commercial applications. Ideal for spaces such as offices, retail stores, and small manufacturing facilities, these units encapsulate advanced technology to enhance indoor air quality and optimize climate control.

One of the standout features of the Carrier 48TF004-007 units is their variable speed compressor technology. This innovation not only allows for precise temperature control but also reduces energy consumption by modulating the compressor's speed according to the cooling or heating demand. By operating at lower speeds during less demanding conditions, these units significantly decrease energy usage compared to traditional single-speed compressors, contributing to lower utility bills and a reduced carbon footprint.

Energy efficiency is further enhanced with the inclusion of high-performance scroll compressors, which are known for their reliable operation and quiet performance. Coupled with an Energy Efficiency Ratio (EER) that meets or exceeds industry standards, these systems are designed to offer economical operation without sacrificing comfort.

Incorporating smart controls and connectivity features, the Carrier 48TF004-007 units allow for easy integration into building management systems (BMS). This enhances the ability to monitor and manage energy usage in real time, further promoting efficiency. The units are also compatible with various thermostat options, allowing for user-friendly operation and customization of settings.

Another significant characteristic of the Carrier 48TF004-007 is its durable construction. Built with galvanized steel and powder-coated finishes, these units are designed to withstand the rigors of outdoor installation, ensuring long-lasting performance even in harsh weather conditions. Additionally, the units come equipped with advanced filtration systems that help improve indoor air quality by effectively removing dust, allergens, and other particulate matter from the air.

Maintenance is simplified with the Carrier 48TF004-007, providing easy access to vital components, which supports reduced downtime and service costs. The units also feature low operating sound levels, making them suitable for noise-sensitive applications.

In conclusion, the Carrier 48TF004-007 rooftop units stand out for their energy efficiency, advanced technology, durability, and ease of maintenance, making them an excellent choice for any commercial space looking to enhance comfort while effectively managing operational costs.
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