Carrier TJF004 Air Conditioner User Manual


 
13
OPTIONAL DURABLADE ECONOMIZER — The option-
al economizer hood assembly is packaged and shipped in the fil-
ter section. Damper blades and control boards are installed at the
factory and the economizer is shipped in the vertical 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.
NOTE: Be sure to engage Durablade economizer flange under
tabs in return-air opening of the unit base.
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 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 ac-
cess panel. Remove outdoor-air opening panel. Save pan-
els and screws. See Fig. 17. Remove optional economizer
and outdoor-air damper hood package from filter section.
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 18. 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 econo-
mizer motor faces the condenser section (see
Fig. 19).
b. Remove screws and tape from damper then 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. 20. Remove 12-pin blue and yellow
wire jumper plug and store.
5. Insert economizer plug into economizer harness. Remove
tape from barometric relief damper. See Fig. 21. Remove
shipping screw (see Fig. 19).
6. If ventilation air is not required, proceed to Step 7. If ven-
tilation air is required, determine the minimum position
setting for required airflow. See Fig. 22. 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. 22. 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. 23. 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. 18) to
outdoor-air opening panel with screws provided.
10. Place knob supplied with economizer on OAT. See
Fig. 23. Set OAT for 3° F below indoor room thermostat
setting. If accessory enthalpy control (EC) is used in
place of OAT, see instructions shipped with EC for instal-
lation and adjustment. See Fig. 23.
11. Connect OAT per Fig. 24.
12. Slide outdoor-air inlet screens 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. 25 for economizer barometric relief
damper characteristics.
ECONOMIZER
CONTROL
BOARD
BAROMETRIC
RELIEF
DAMPER
ECONOMIZER
PLUG
ECONOMIZER
MOTOR
SHIPPING
SCREW
Fig. 18 — Outdoor-Air Hood Details
Fig. 19 — Horizontal Durablade
Economizer Installation
Fig. 17 — Typical Access Panel Locations