Carrier 40BNC Installation guide

Brand: Carrier

Model: 40BNC

Category: Split-system air conditioners

Type: Installation guide

53DS−900−−−091

Installation Instructions

Duct−Free Systems

Wired Room Controller

Cooling Only and Heat Pump High−Wall Units

(Sizes 018−036)

NOTE: Read and become familiar with these instructions before

beginning installation.

SAFETY CONSIDERATIONS

Installing and servicing air−conditioning equipment can be

hazardous due to system pressures and electrical components.

Only trained and qualified personnel should install or service

air−conditioning equipment. When working on air−conditioning

equipment, observe the precautions provided in literature, tags,

and labels attached to the unit.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes

and National Electrical Code (NEC) for special requirements.

Recognize safety information. This is the safety−alert symbol !

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.

Understand these signal words: DANGER, WARNING, and

CAUTION. These words are used with the safety−alert symbol.

DANGER identifies the most serious hazards which will result in

severe personal injury or death. WARNING signifies hazards

which could result in personal injury or death. CAUTION is used

to identify unsafe practices which may result in minor personal

injury or product and property damage. NOTE is used to

highlight suggestions which will result in enhanced installation,

reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before beginning any modification or installation of this kit,

be sure the main electrical disconnect is in the OFF position.

Ensure power is disconnected to the fan coil unit. On some

systems both the fan coil and the outdoor unit may be on the

same disconnect. Tag the disconnect switch with a suitable

warning label. There may be more than one disconnect.

!WARNING

GENERAL

The wired remote controller is used with the 40BNC

High−Wall fan coil units which use microprocessor control.

The remote controller is directly wired to the fan coil by an

interconnecting cable provided. Temperature sensing is done

at the fan coil unit, so the wall controller may be located

anywhere within 9 ft. of the unit.

The remote controller provides an interface with the unit to:

SChange set points

SSet timer

SStart and stop unit

SDisplay operating status of unit

SDisplay fault codes should a problem occur.

Refer to Table 1 and Fig. 1 for a list of parts included in this

kit.

Table 1—Wired Remote Controller Kit Contents

Item Quantity

RTX Wired Remote Controller 1

Display Cable 9 ft.

Attachment Screws 2

Anchors 2

Wall Control Circuit Board 1

Display Cable

9.2 ft in Length Room Controller Unit

(RTX) Wall Contro

Circuit Board

A06468

Fig. 1 − Kit Contents

INSTALLATION OF WIRED ROOM CONTROLLER

1. Select a location to mount the wall controller.

Since the wall controller is not used to sense temperature,

it should be placed in a location that is easily accessible

when changing settings and at a height where the display

can be easily seen (approximately 5 ft. above the floor and

within 9 ft. of the fan coil.)

2. Take the Room Controller (RTX) out of its packaging.

3. Mount the control on the wall, taking into account the

length of available cable (9 ft.).

NOTE: Common phone cable will not replace the cable

provided with the kit.

4. Connect the display unit cable to the RTX display unit

(see Fig. 2).

DISPLAY CABLE

RTX

Display Control Card

(New in the controller)

Remove the

display unit

cover

Screw to

fix unit

to wall

ON Button

Power ON

Light Display

2.8 meters

(9.2 ft)

RTX Display Unit

Insert the

display cable

into the RTX

display unit

A06469

Fig. 2 − Connecting Display Unit Cable

to RTX Display Unit

INSTALLATION OF DISPLAY ADAPTER CARD

1. Follow these instructions to install the wall control adapter

circuit board.

2. Installing the wired controller requires the replacement of

the existing circuit board with the wall control adapter

circuit board included in the kit.

3. Use the existing wireless remote to turn off the unit.

4. Disconnect the power supply.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before beginning any modification or installation of this kit,

be sure the main electrical disconnect is in the OFF position.

Ensure power is disconnected to the fan coil unit. On some

systems both the fan coil and the outdoor unit may be on the

same disconnect. Tag the disconnect switch with a suitable

warning label. There may be more than one disconnect.

!WARNING

5. Remove the front grille (see Fig. 3)

A06470

Fig. 3 − Remove Front Grille

6. Carefully close the louvers.

7. Remove the two screws from the electrical box cover. (See

Fig. 4.)

FILTER

RECEIVER

POWER/AIRCOND TIMER

FUSE

AUTO/OFF

FILTER RESET

SERVICE LED

A06471

Fig. 4 − Remove Screws From Electrical Box Cover

8. Remove the electrical box cover.

9. Remove the two screws from above the air vents

(see Fig. 4).

NOTE: Some models have three screws.

10. On the bottom of the air conditioner, there are three

indicator triangles. Press gently on the triangles with a

downward motion (see Fig. 5).

FILTER

RECEIVER

POWER/AIRCOND TIMER

FUSE

A06472

Fig. 5 − Press Downward on Indicator Triangles

11. Make sure that the louvers are closed. Remove the air

conditioner’s front panel and place it aside.

12. Remove the screw that holds the control unit in place (see

Fig. 6).

53DS−900−−−091

TH1

TH2

TH3

12346/N7*

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

connecto

Card

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

12346/N7*

123456

Controlle

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

INSTALLING RTX ROOM DISPLAY

The RTX display unit must be fixed to the wall. Do not locate the

RTX display unit underneath the indoor unit (see Fig. 10).

A06449

A06480

Fig. 10 − RTX Room Display

1. Remove the RTX display unit from its packaging.

2. Place the unit on the wall, taking into account the length

of available cable.

3. Connect the display unit cable to the RTX display unit

(see Fig. 8).

4. Connect the air−conditioner to the power supply and make

an initial check to ensure that everything is working

properly.

5. Check that the RTX display unit light is ON.

6. Press the ON button to start the air−conditioner working.

7. If the air−conditioner does not begin working, or is not

working properly, refer to the Troubleshooting section.

8. If the air−conditioner is working properly, turn it OFF and

disconnect it from the power supply.

9. Remove the cover from the RTX display unit (see Fig.

11).

10. Use the template to mark the position for drilling the hole

for the screw.

11. Press an anchor into the hole in the wall.

12. Use the screw to attach the RTX display unit onto the wall

(see Fig. 11).

DISPLAY CABLE

RTX

Display Control Card

(New in the controller)

Remove the

display unit

cover

Screw to

fix unit

to wall

ON Button

Power ON

Light Display

2.8 meters

(9.2 ft)

RTX Display Unit

Insert the

display cable

into the RTX

display unit

A06481

Fig. 11 − Connecting Display Unit Cable to RTX

TESTING AND TROUBLESHOOTING

1. If the RTX room display unit is working properly during

the initial check, perform a complete check as instructed in

the attached operating manual. Check the changes between

operating modes, changes in fan speed settings,

temperature adjustments, etc.

2. If necessary, the display can be changed from degrees

Celsius to degrees Fahrenheit (details in the operating

manual).

3. If the complete check reveals any malfunctions, refer to

the troubleshooting table in the operating manual.

4. If the air−conditioner is working properly, turn it OFF and

disconnect it from the power supply.

5. Refer to the section in this manual marked Installation of

Display Adapter Card and reverse steps 5 through 11.

6. Connect the air−conditioner to the power supply.

7. Turn the air−conditioner ON.

Table 2—Troubleshooting Table

Malfunction Possible Causes Recommended Solutions

RTX Display Unit is not lit (display OFF)

and the POWER indicator light is OFF

Faulty display unit cable (cable between the

control box and the RTX room display unit).

RTX room display unit malfunctioning.

Replace the display unit cable.

Replace the RTX room display unit.

RTX Display Unit is not lit (display OFF)

and the POWER indicator light is ON.

A beep can be heard every 20 seconds.

Faulty display unit cable (cable between the

control box and the RTX room display unit).

Dipswitches are not set properly.

Replace the display unit cable.

Check position of dipswitches according to

the sticker on the side of the control.

Dipswitch 4 should be in the OFF position.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: IIK−53DS900−5

Replaces: New

Printed in U.S.A. Edition Date: 08/06

53DS−900−−−091

Carrier 40BNC Installation guide

Brand: Carrier

Model: 40BNC

Category: Split-system air conditioners

Type: Installation guide

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Carrier 40BNC Installation guide

Carrier 40BNC Installation guide

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