Typical Access Panel Locations | Carrier 48TF004-007 specification

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

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.

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