Carrier 48HDT User Manual

Page 14

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OUTDOOR BLADES (2)

MOTOR

ACCESS

HOLE

^FOR VENT

¡^POSITION

i SETSCREW

BAFFLE

ECONOMIZER ASSEMBLY

DRIVE
SHAFT

OUTDOOR DRIVE LINKAGE

Fig. 24 — Economizer Details (008 Units)

PINK WIRE

VIOLET WIRE

TERMINAL D

Fig. 25 — Economizer Motor Connections

(008 Units)

DAMPER PLATE

BASE RAIL

Fig. 26 — Baffle Installation Details

(008 Units)

...............iiSiSKiSSi

Fig. 27 ~ Vent Position Setting Details

(008 Units)

4. Determine if vent air is required in building to

be conditioned. If so, check for percentage of
vent air needed and record quantity for vent
adjustment in step 11.

5. Remove jumper plug from base unit receptacle

and discard. Insert economizer plug into recep-

. tacle. See Fig. 23.

Steps 6 through 8 involve releasing and adjust
ing indoor damper blades from factory set

position.

6. Release indoor blades drive linkage by loosen

ing linkage connector setscrew at indoor crank-

arm on drive shaft. See Fig. 24.

Remove pink wire from economizer damper

motor terminal D and temporarily tape bare
wire end.

Remove violet wire from economizer damper

motor and connect to terminal D on economizer
damper motor. See Fig. 25.

7. Jumper red (base unit 24-v power) and black

wires in 24-volt control box compartment. See

Fig. 10 and 12.

Turn on base unit power to energize evaporator
fan. The economizer’s outdoor blades should

open completely.

8. Adjust the indoor blades drive linkage so that

indoor blades are fully closed. Tighten the
linkage connector setscrew. Turn off base unit
power. Reconnect pink and violet wires to

economizer motor, as shown in Fig. 25.

9. If vent air is required, leave red and black wires

jumpered. If vent air is not needed, remove
jumper between red and black wires.

10. Fasten baffle to left side of damper plate with

round head screws provided. See Fig. 26.

11. If vent air is not required, go on to step 12. If

vent air is required, proceed as follows:

Turn on base unit power. This energizes the
evaporator fan motor.

Slide economizer out of unit so that access
hole to vent position setscrew is visible. See
Fig. 27.