background image

NOTES 

• 

If the number of indoor units to be connected is less than the number of branch ports (so that there are 
empty branch ports left, or if you plan to increase the number in the future), any of the branch ports 
can be left open.

• 

If you plan to add new indoor units in the future, select a pipe size based on the total indoor unit capac-
ity before addition of new units.

• For more information about how to install the stop valve kit for extension, refer to the installation man

-

ual included with the stop valve kit for extension.

5-2  Pipe connection work precautions

Connect the pipes.

• Braze (*2) refrigerant pipes after nitrogen replacement (replacing air and nitrogen while allowing nitro

-

gen to flow inside the refrigerant pipe (*1)). (

Refer to Fig. 2.)

(*1)  The pressure regulator for the nitrogen released when doing the brazing should be set to about 2.9 

psi (0.02 MPa) (enough to feel a slight breeze on your cheek).

(*2)  Do not use flux when brazing the refrigerant pipe.

 

Use phosphor copper (B-Cu93P-710/795: ISO 3677), which does not require flux, as the filler 

metal for brazing. 

(Using chlorine flux may cause the pipes to corrode, and if it contains fluoride it may cause the 

refrigerant lubricant to degrade, adversely affecting the refrigerant piping system.)

 

Location of brazing

Nitrogen

Refrigerant pipe

Valve

Taping

Nitrogen

Pressure regulator

Fig. 2

CAUTION

• Do not use an anti-oxidizing agent when brazing the piping.

 

(Residual debris could clog the piping or cause parts to malfunction.)

• 

For more information about outdoor unit refrigerant pipes, see the installation manual included with the 

outdoor unit or the Engineering Guide.

 

(Failure to purge air from the pipes or fill additional refrigerant may result in an insufficient volume of 
refrigerant in the pipes or other problems, causing the equipment to malfunction [for example, to not 

cool or heat properly].)

8

3P405106-9 English

01_EN_3P405106-9.indb   8

3/27/2015   1:53:10 PM

Содержание VRV IV Series

Страница 1: ...HIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE LIRE SOIGNEUSEMENT CES INSTRUCTIONS AVANT L INSTALLATION CONSERVER CE MANUEL A PORTEE DE MAIN POUR REFERENCE ULTERIEURE LEA CUIDADOSAMENTE ESTAS INSTRU...

Страница 2: ...onnel must carry out the installation work Installation must be done in accordance with this installation manual Improper installation could result in water leakage electric shock or fire When install...

Страница 3: ...stallation only Outdoor units can be installed either outdoors or indoors This unit is for indoor use Do not install the air conditioner or heat pump in the fol lowing locations a Where a mineral oil...

Страница 4: ...NSTALLATION SITE 4 3 PREPARATIONS BEFORE INSTALLATION 5 4 BRANCH SELECTOR UNIT INSTALLATION 5 5 REFRIGERANT PIPING WORK 6 6 ELECTRIC WIRING WORK 11 7 INITIAL SETTING 17 8 ADDING AN ADDITIONAL CHARGE O...

Страница 5: ...Insulation tube 2 Vinyl tube 3 Quantity BS4Q54TVJ 23 pcs 4 pcs 4 pcs 1 pc BS6Q54TVJ 32 pcs 6 pcs 6 pcs BS8Q54TVJ 40 pcs 8 pcs 8 pcs BS10Q54TVJ 49 pcs 10 pcs 10 pcs BS12Q54TVJ 57 pcs 12 pcs 12 pcs Sha...

Страница 6: ...42 48 54 72 96 Example selection In case of the Branch Selector unit with connect a FXFQ12P and a FXMQ18P Total capacity 12 18 30 1 4 Checklist Exercise particular care concerning the following items...

Страница 7: ...0 or more 20 500 or more 1 18 450 2 Control box 4 100 or more 3 4 100 or more Control box and motorized valve coil Maintenance space Indoor unit side pipe 1 Unit in mm Fig 1 1 Leave enough space to co...

Страница 8: ...rts that conform to the designated specifications when installing the unit 1 Position the Branch Selector unit and secure it temporarily in place Attach the hanging brackets to the suspension bolts as...

Страница 9: ...t the size of piping between the outdoor unit refrigerant branch kit and the Branch Selector unit and between the Branch Selector unit and indoor units refrigerant branch kits based on example con nec...

Страница 10: ...6 4 24 30 36 42 48 54 f5 8 f15 9 f3 8 f9 5 72 f3 4 f19 1 96 f7 8 f22 2 Table 5 lists Branch Selector unit connection pipe size Table 5 Branch Selector unit connection pipe size Outdoor unit side 1 Bra...

Страница 11: ...a enough to feel a slight breeze on your cheek 2 Do not use flux when brazing the refrigerant pipe Use phosphor copper B Cu93P 710 795 ISO 3677 which does not require flux as the filler metal for braz...

Страница 12: ...ng joint may be required field supply if the local pipe size does not suit on the pipe size of the Branch Selector unit Table 5 If there are branch ports left unused not connected to an indoor unit If...

Страница 13: ...piping and gas piping so use insulation that can withstand more than 250 F 120 C When reinforcing the insulation material in accordance with the installation environment also reinforce the insulation...

Страница 14: ...wire installation work Follow the WIRING DIAGRAM attached to the unit body to wire the outdoor unit and indoor units Properly connect wire of the specified wire type and copper thickness Also use the...

Страница 15: ...rrent Use copper conductors only Use insulated wire for the power cord Select the power supply cable type and size in accordance with relevant local and national regulations Use vinyl cord with sheath...

Страница 16: ...d 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 TO IN D UNIT Never connect to power supply wiring In case joining branch pipes Note 2 IN...

Страница 17: ...ed 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...

Страница 18: ...the included clamps 1 to securely hold the wires For more information about how much insulation to strip off transmission wir ing refer to the following figure Transmission wiring 3 8 in 10 mm 2 in 50...

Страница 19: ...e wire use the included clamp 1 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 that the control bo...

Страница 20: ...D I J K L 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 po...

Страница 21: ...N 1 Verify that the control box cover is closed 2 Refer to the installation manual included with the outdoor unit and conduct a check and a test run after all the work on the Branch Selector unit and...

Страница 22: ...5151 San Felipe Suite 500 Houston TX 77056 3P405106 9 EM14A003A 1506 HT 00_CV_3P405106 9 indd 2 4 20 2015 3 08 14 PM...

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