Carrier 48HJD005-007 specifications Accessory Field-Installed Humidistat, 208/230-V Unit Shown

OPTIONAL DURABLADE ECONOMIZER — The option- al economizer hood assembly is packaged and shipped in the filter section. Damper blades and control boards are installed at the factory and the economizer is shipped in the vertical dis- charge 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 the minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 7.

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 ac- cess panel. Remove outdoor-air opening panel. Save pan- els and screws. See Fig. 13. Remove economizer, and re- move optional outdoor-air damper hood package from filter section (located behind economizer).

3.Assemble outdoor-air hood top and side plates as shown in Fig. 14. Install seal strips on hood top and sides. Put aside screen retainer and retainer screw for later assem- bly. Do not attach hood to unit at this time.

4.Slide economizer into unit and secure with screws. See Fig. 15.

NOTE: Be sure to engage rear economizer flange under tabs in vertical return-air opening.

5.To convert to horizontal discharge application:

a.Rotate economizer 90 degrees until the econo- mizer motor faces the condenser section (see Fig. 16).

b.Remove tape and shipping screw, rotate the baro- metric relief damper cover 90 degrees.

LEGEND

C— Contactor (Compressor) CCH — Crankcase Heater COMP — Compressor

FU — Fuse

HU — Humidistat

IFM — Indoor (Evaporator) Fan Motor LLSV — Liquid Line Solenoid Valve

S-LPS — Low-Pressure Switch (Subcooler Only) TRAN — Transformer

Factory Wiring

Accessory or Optional Wiring

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. 17.

6.Remove 12-pin blue and yellow wire jumper plug from factory wiring harness and store. Insert economizer plug into 12-pin plug of factory wiring harness. Remove tape and shipping screw from barometric relief damper. See Fig.18.

7.If ventilation air is not required, proceed to Step 8. If ven- tilation air is required, determine minimum position set- ting for required airflow. See Fig. 19. 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. 19. Tighten screws.

8.Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips pro- vided. See Fig. 20. Make sure OAT terminals are posi- tioned up.

MOISTUREMISER

% RELATIVE HUMIDITY

Fig. 11 — Accessory Field-Installed Humidistat

Fig. 12 — Typical MoistureMiser Dehumidification Package Humidistat Wiring

(208/230-V Unit Shown)

12