Mixing Box Actuator; Return Units Only); Mixing Box Actuator Assembly - Carrier 39SH Installation, Start-Up And Service Instructions Manual

7. Center the door panel over the return-air access opening.
8. Align the holes in the top and bottom of the door panel to
the holes in the rooftop unit. Secure the door panel to the
unit using the provided no. 10-16 x
Fig. 31.
a39-4099
Fig. 27 — Motorized Outside Air Damper
a39-4100
Fig. 28 — Assemble the Outside Air Hood
a39-4101
Fig. 29 — Remove Access Panel(s) from Unit
1 / screws as shown in
2
23
Fig. 30 — Secure Adapter Panel to Unit
Fig. 31 — Secure Door Panel to Unit
Mixing Box Actuator (for 39SH and 39SM Hori-
zontal Return Units Only)
MIXING BOX ACTUATOR ASSEMBLY (Fig. 32 and
33) — To assemble the mixing box actuator:
1. Press logic module onto actuator.
2. Remove lock nut from swivel nut assembly. Place swivel
nut assembly into slot on actuator arm. Hand tighten lock
nut onto swivel nut assembly. Swivel nut assembly will
need to be adjusted once installed for proper actuator
motion.
3. Attach actuator arm assembly to actuator with four 1/4-in.
screws. Arm may need to be repositioned once installed
to ensure proper actuator motion.
Fig. 32 — Actuator Assembly
a39-4102
a39-4103
a39-4104