Carrier 40BNC, Installation Instructions

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3
TH1
TH2
TH3
1 2 3 4 6/N 7*
Inter-unit
cable
Inter-unit
cable clamp
Power
cable
Power
cable
clamp
Screw attaching the
controller to the air-
conditioning unit
THI, TH2 and TH3
sensor connections to
the control unit
A06473
Fig. 6
−
Control Unit
13. Use a screwdriver to release the end of the inter − unit cable
from its connectors (see Fig. 6).
14. Use a screwdriver to release the power cable ends from the
connectors (see Fig. 6).
15. Use a screwdriver to release the inter − unit cable from its
clamp.
16. Use a screwdriver to release the power cable from its
clamp.
17. Remove the TH1, TH2, and TH3 sensors from their
connection locations in the unit (see Fig. 6).
18. Pull the controller slightly outwards.
19. Disconnect the existing display card connections
(see Fig. 7.)
TH1
TH2
TH3
Display
Card
connector
Card gripping tabs
A06474
Fig. 7
−
Wall Control Adapter
20. Open the gripping tabs on each side and remove the
existing display card from its socket (see Fig. 7).
21. Thread the new display cable (included in the kit) through
the rear of the air − conditioner (adjacent to the entry for the
inter − unit cable) and through the space underneath the
display card (see Fig. 8).
TH1
TH2
TH3
Back of new card:
Insertion of the display
cable into the display
socket.
Return the display
connector to its
original location
Additional display
card connection;
previously hidden.
A06475
Fig. 8
−
Threading Display Cable
22. Insert the end of the new display unit cable into the socket
located underneath the wall control adapter circuit board
(see Fig. 8).
23. Insert the ends of the two wiring harnesses into the
existing connectors located in upper part of the Display
Adapter Card (see Fig. 8).
24. Press down gently on the wall control adapter circuit
board to insert it into its proper position (to make this
easier, open the tabs on each side of the cardholder (see
Fig. 7).
DIPSWITCH SETTINGS
TH1
TH2
TH3
1 2 3 4 6/N 7*
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Controller
Lower right side of
the controller
Move DIP
switch 4 to the
OFF position.
A06477
Fig. 9
−
Dipswitch Settings
NOTE : Only dipswitch 4 should be changed. All other switches
should remain in the position as shown on the sticker on the back
of the control unit.
1. Changes must be made to the position of dipswitch 4 in
the indoor unit’s control box to allow the air conditioner to
be operated by RTX room display unit fixed to the wall.
2. Remove the control box to permit access to the
dipswitches located in the lower part of the control box.
3. Move dipswitch number 4 to the OFF position
4. Replace the control back in its proper position
(see Fig. 9).
5. Reinstall control box and all connecting wires by
reversing steps 3 through 15 in the Installation section of
the display card.
53DS
−
900
−−−
091