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17

CAUTION

• 

Use 2-core transmission wiring. 
Using the same wire with 3 or more cores to connect 2 or more indoor units may cause them to stop with 
an error.

• 

When the shield wire is used, be sure to ground the one side of the shield wire. 
The total wiring length is 1500m when shielded wire is used.

• 

Be sure to use ring type crimp style terminals with insulation sleeves to  
connect wires to the power supply terminal block. (

Refer to Fig. 11.

)

• 

Do not use with the power supply terminal block and earth terminal  
connected to wiring for another circuit.

• 

Do not pre-solder stranded wire.

• 

Connect wires securely so that the terminals will not be subjected to external force.

• 

Use an appropriately sized screwdriver to tighten the terminal screws. 
Use of a screwdriver that is too small could damage the screw head and prevent proper tightening.

• 

Overtightening the terminal screws could damage the screw. 
Refer to the table for the terminal screw tightening torque. 

Terminal screw size

Tightening torque (N·m)

M3.5  

(transmission wire terminal block)

0.88 ± 0.08

M4  

(power supply terminal block)

1.31 ± 0.13

M4  

(earth terminal)

1.69 ± 0.17

• 

Never connect power supply wiring to the transmission wiring terminal block. 
Doing so may damage the entire system.

• 

Transmission wiring cannot be branched again after the initial branch.  
(

Refer to Fig. 12.

)

F1 F2

F1 F2

F1 F2

F1 F2

F1 F2

Branch after initial branch

Branch

Fig.  12   

Ring type crimp 
style terminal

Electric wire

Insulation 
sleeve

Fig. 11

01_EN_3P194121-8U.indd   17

2/21/2014   3:31:12 PM

Summary of Contents for BS4Q14AV1

Page 1: ...ANTES DE INSTALAR GUARDE ESTE MANUAL EN UN LUGAR A MANO PARA LEER EN CASO DE TENER ALGUNA DUDA PRIMA DELL INSTALLAZIONE LEGGERE ATTENTAMENTE QUESTE ISTRUZIONI TENERE QUESTO MANUALE A PORTATA DI MANO P...

Page 2: ...ay result in minor or moderate injury It may also be used to alert against unsafe practices WARNING Ask your local dealer or qualified personnel to carry out installation work Improper installation ma...

Page 3: ...fter completing the installation work check to make sure that there is no leakage of refrigerant gas Toxic gas may be produced if refrigerant gas leaks into the room and comes into contact with a sour...

Page 4: ...that the following accessories have been included in the packaging Important Do not throw away any accessories that may be needed in installation work until installation is complete Name Accessory pip...

Page 5: ...ta book Example selection In case of the BS unit with connect a FXCQ32M and a FXSQ40M Total capacity 31 25 40 71 25 2 4 Checklist Exercise particular care concerning the following items during install...

Page 6: ...unit 450 450 70 300 or more 500 or more 1 450 2 Control box 100 or more 3 100 or more Drain pan Maintenance space Control box and motorized valve coil Maintenance space Indoor unit side pipe 1 Unit m...

Page 7: ...ion pipe All the above parts must be supplied in the field Example installation 5 BS UNIT INSTALLATION Use only accessories and parts that conform to the designated specifications when installing the...

Page 8: ...nd included with the outdoor unit Before beginning the work be sure to verify that the type of refrigerant used is R410A The unit will not operate correctly with a different type of refrigerant Insula...

Page 9: ...of the pipes between the BS unit and the refrigerant branch kits and between the refrigerant branch kits and indoor units Upstream Suction gas pipe HP LP gas pipe Liquid pipe BS unit Downstream Indoo...

Page 10: ...new units Be sure to use the stop valve kit for extension KHFP26M224 sold separately for pipe that you plan to expand in the future Do not size pipe based on anticipated future expansion Instead reex...

Page 11: ...cut and connect as it is In case of others cut the outlet pipe and connect to the connecting pipe In accordance with the following instructions Cutting point Center of connection area Connect Local pi...

Page 12: ...and gas piping so use insulation that can withstand more than 120 C When reinforcing the insulation material in accordance with the installation environment also reinforce the insulation on the pipin...

Page 13: ...ulation material with the seam facing up Refer to Fig 3 7 DRAIN PIPING WORK 1 Drain piping work Install drain piping so that wastewater drains reliably Use a pipe diameter that is the same as or great...

Page 14: ...terval of 1 to 1 5 m so that the pipe does not droop Refer to Fig 4 Metal clamp 5 Sealing material 6 Accessories Accessories Drain hoses 4 Accessories To prevent condensation do not leave any gap Fig...

Page 15: ...nit body to wire the outdoor unit and indoor units Properly connect wire of the specified wire type and copper thickness Also use the included clamp to avoid applying excessive force to the terminal f...

Page 16: ...se insulated wire for the power cord Select the power supply cable type and size in accordance with relevant local and national regulations Specifications for local wiring are in compliance with IEC60...

Page 17: ...unit Note 1 Indoor unit A Indoor unit B 1 Indoor unit B 2 Note 3 Indoor unit C Note 2 Indoor unit Indoor unit OUT OUT OUT IN Never connect to power supply wiring When joining branch pipes Indoor unit...

Page 18: ...external force Use an appropriately sized screwdriver to tighten the terminal screws Use of a screwdriver that is too small could damage the screw head and prevent proper tightening Overtightening th...

Page 19: ...subject to tensile force Bundle transmission wiring together Clamps 2 Accessories Transmission wiring Remove the control box cover and connect the wires to the transmission wiring terminals outdoor un...

Page 20: ...hen fastening the wire use the included clamp 2 so as not to apply tensile force to the wire connec tion and then securely fasten the wire Also after the wiring is completed organize the wiring so tha...

Page 21: ...P Piping branch port number Terminal No to which to connect transmission wiring DIP switch Setting 1 Setting for branch ports to which no indoor unit is connected Setting Setting for branch ports to w...

Page 22: ...ional charge of refrigerant 11 CHECK OPERATION AND TEST OPERATION 1 Verify that the control box cover is closed 2 Refer to the installation manual included with the outdoor unit and conduct a check an...

Page 23: ...3P194121 8U EM13A025A 1402 HT 00_CV_3P194121 8U indd 2 2 15 2014 3 47 51 PM...

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