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17

3P477778-7G English

•  If the piping length between the outdoor units exceeds 6.5 ft. (2 m), 

create a rise of 8 in. (200 mm) or more in the suction gas and high/
low pressure gas line within a length of 6.5 ft. (2 m) from the kit. 

If ≤6.5 ft. (2 m)

1

2

a

If >6.5 ft. (2 m)

1

a

b

c

2

1  To indoor units
2  Piping between outdoor units
a  

≤6.5 ft. (2 m)

b  

≥8 in. (200 mm)

c  >6.5 ft. (2 m)

 NOTE

There are restrictions on the refrigerant pipe connection order be-
tween outdoor units during installation in case of a multiple outdoor 
unit system. Install according to following restrictions. The capacities 

of outdoor units A and B must fulfill the following restriction conditions: 
A≥B.

A

B

1 2

1  To indoor units
2  Outdoor unit multi connection 

piping kit (first branch)

8 .2 .6 .  Branching the refrigerant piping

For installation of the refrigerant branch kit, refer to the installation 
manual delivered with the kit.

A

B

±3

1

1

Horizontal

Vertical

1 Horizontal surface

•  Mount the REFNET joint so that it branches either horizontally or 

vertically.

•  Mount the REFNET header so that it branches horizontally.

Installation of the multi connection piping kit.

A

1

B

1

C

D

±15°

C >4-3/4 in. (120 mm)
D >19-11/16 in. (500 mm)

• 

Install the joints horizontally, so that the caution label (1) attached to 
the joint comes to the top.

 

- Do not tilt the joint more than 15° (see view A).

 

- Do not install the joint vertically (see view B).

• 

Make sure that the total length of the piping connected to the joint 
is absolute straight for more than 19-11/16 in. (500 mm). Only if a 

straight field piping of more than 4-3/4 in. (120 mm) is connected, 

more than 19-11/16 in. (500 mm) of straight section can be ensured.

• 

Improper installation may lead to malfunction of the outdoor unit.

8 .3 .  Guidelines for handling stop valve

8 .3 .1 .  Cautions on handling the stop valve

• 

Make sure to keep all stop valves open during operation. 

•  The figure below shows the name of each part required in handling 

the stop valve.

• 

The stop valves are factory closed.

• 

When handle the stop valves, be careful not to damage the port 
pipes around (refer to P22). 

3

4

1

2

1 Service port and service port 

cover

2 Stop valve
3 Field piping connection
4 Stop valve cover

1

2

3

4

5

1 Service port
2 Cap
3

Hexagon hole

4 Shaft
5 Seal

01_EN_3P477778-7G.indb   17

1/15/2019   10:58:09

Summary of Contents for REYQ120XATJU

Page 1: ...12XAYCU REYQ336XAYCU REYQ360XAYCU REYQ384XAYCU REYQ408XAYCU REYQ432XAYCU VRV System air conditioner Please visit http www daikinac com content resources manuals for the most current version of install...

Page 2: ...sonnel 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 instal...

Page 3: ...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 mist or oi...

Page 4: ...size and allowable pipe length 9 7 1 General information 9 7 2 Selection of piping material 9 7 3 Selection of piping size 9 7 4 Selection of refrigerant branch kits 10 7 5 System piping length limita...

Page 5: ...REYQ120XATJU XAYDU XAYCU 1 REYQ144XATJU XAYDU XAYCU 1 REYQ168XATJU XAYDU XAYCU 1 REYQ192XATJU XAYDU XAYCU 2 REYQ216XATJU XAYDU XAYCU 1 1 REYQ240XATJU XAYDU XAYCU 2 REYQ264XATJU XAYDU XAYCU 1 1 REYQ288...

Page 6: ...343 REYQ288XATJU XAYDU XAYCU 144 374 REYQ312XATJU XAYDU XAYCU 156 405 REYQ336XATJU XAYDU XAYCU 168 436 REYQ360XATJU XAYDU XAYCU 180 468 REYQ384XATJU XAYDU XAYCU 192 499 REYQ408XATJU XAYDU XAYCU 204 53...

Page 7: ...he weight of the unit Installation location is flat to prevent vibrations and noise generation and to have sufficient stability The space around the unit is adequate for maintenance and servic ing ref...

Page 8: ...improper installation may result in the unit turning over 4 2 Weather related precautions Be sure that the air inlet of the unit is not positioned towards the main wind direction Frontal wind will di...

Page 9: ...elow and choose one of the possibilities a b a c d a b a e d e c a b a e d f c a b a e b d c a b a e d f c 1 2 3 5 4 ABCD Sides along the installation site with obstacles Suction side A B C D A B 1 a...

Page 10: ...ons can be found in the Engineering Data Book 6 Inspecting handling and unpacking the unit 6 1 Inspection At delivery the unit must be checked and any damage must be re ported immediately to the carri...

Page 11: ...a tion bolts until their length remains 13 16 in 20 mm above the foundation surface A A 13 16 in 20 mm NOTE There are restrictions on the refrigerant pipe connecting order between outdoor units in the...

Page 12: ...d installation conditions on page 24 are complete Do not use flux when brazing the refrigerant piping Use the phos phor copper brazing filler metal B Cu93P 710 795 ISO 3677 which does not require flux...

Page 13: ...6 4 mm 24 30 36 42 48 54 5 8 in 15 9 mm 3 8 in 9 5 mm 72 3 4 in 19 1 mm 96 7 8 in 22 2 mm 7 4 Selection of refrigerant branch kits For piping example refer to 7 3 Selection of piping size on page 9 W...

Page 14: ...tally paying attention to the installation restrictions indicated in 8 Precautions on refrigerant piping on page 14 Example of connection Outdoor unit side Indoor unit side Branch Selector unit 1 2 1...

Page 15: ...nits H3 16 ft 5 m Allowable length after branch 5 Actual piping length Actual piping length from the first REFNET joint or REFNET header to indoor unit 130 ft 40 m 8 Example 4 d g i 130 ft 40 m 7 b c...

Page 16: ...j k B1 B2 B3 B4 B5 B6 B7 2 s r q Branch Selector units B1 B7 b c d e f g p 130 ft 40 m From outdoor unit to the farthest indoor unit 9 From outdoor unit to the nearest indoor unit 1 2 The total pipin...

Page 17: ...revents the creation of large quantities of oxidized film on the inside of the piping An oxidized film ad versely affects valves and compressors in the refrigerating system and prevents proper operati...

Page 18: ...quid pipe stop valve Suction gas pipe stop value Protective plate Stop valves mounting plate High low pressure gas pipe stop valve 5 Cut off the lower part of the smaller pinched piping with an ap pro...

Page 19: ...ts are the responsibility of the installer field piping 8 2 4 Precautions when connecting piping between outdoor units multiple outdoor units system To connect the piping between outdoor units an opti...

Page 20: ...T header so that it branches horizontally 2 Installation of the multi connection piping kit A 1 B 1 C D 15 C 4 3 4 in 120 mm D 19 11 16 in 500 mm Install the joints horizontally so that the caution la...

Page 21: ...to 8 3 2 How to use the stop valve Check for refrigerant leaks after tightening the service port cover 9 Field wiring NOTE All field wiring and components must be installed by a licensed elec trician...

Page 22: ...AYDU f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz f3 60Hz 460V 460V 460V 460V 460V 460V 460V 460V 460V 460V 460V 460V...

Page 23: ...ck operation in installation work onsite settings and so on are done by operating the printed circuit board A1P of Master unit NOTE Do not connect the power wiring to terminals for the transmission wi...

Page 24: ...ating sleeves for con nections See the figure below Crimp style terminal Insulating sleeve Power wire For wiring use the designated power wire and connect firmly then secure to prevent outside pressur...

Page 25: ...r tight test and vacuum drying NOTE Always use nitrogen gas for the air tightness test Absolutely do not open the stop valve until the main power circuit insulation measurement has been completed Meas...

Page 26: ...system again using the vacuum pump for 1 hour to 500 microns or less vacuum drying If the system cannot be evacuated to 500 microns within 2 hours repeat the operation of vacuum break and vacuum dryin...

Page 27: ...access you can remove the service window cover see figure Now you can open the inspection door of the control box cover see figure You can see 3 push buttons and 3 seven segment displays and DIP switc...

Page 28: ...of indoor units which are con nected to the system Result mode 1 setting 10 is addressed and selected return value is monitored information To leave the monitoring function push BS1 one time you will...

Page 29: ...rant charge In case recharge is required refer to the nameplate of the unit It states the type of refrigerant and necessary amount 14 2 Calculating the additional refrigerant charge NOTE The refrigera...

Page 30: ...units BS4Q54T 1 BSQ60T 1 BSQ96T 1 Indoor units FXMQ type 18 1 24 1 30 1 36 2 FXFQ type 36 2 Other 48 1 Liquid piping a f3 4 60 ft e f1 4 15 ft i f3 8 20 ft m f3 8 15 ft r f1 2 10 ft b f5 8 20 ft f f3...

Page 31: ...te Since this refrigerant is a mixed refrigerant adding it in gas form may cause the refrigerant composition to change preventing normal operation Before charging check whether the refrigerant cylinde...

Page 32: ...ank only to the liquid stop valve service port open valve A Make sure that all outdoor unit stop valves as well as valves B and C are closed 1 2 3 4 5 6 A C B 9 8 10 10 11 13 12 14 15 7 1 Gauge manifo...

Page 33: ...stop valves after pre charging the refrigerant Operating with the stop valves closed will damage the compressor 15 Start up and configuration INFORMATION It is important that all information in this c...

Page 34: ...The second method is to enable low noise operation based on an external input For this operation an optional acces sory is required 1 2 shows the status of power consumption limitation operation 1 uni...

Page 35: ...only be effective when the optional external control adaptor DTA104A61 62 is installed Default value 0 To activate this function change 2 12 1 2 18 Fan high static pressure setting In order to increas...

Page 36: ...l signal is sent to the unit this setting defines the level power consumption limitation that will be applied for step 2 The level is according to the table Default value 1 Change 2 31 1 2 or 3 in fun...

Page 37: ...t 50 m the setting 2 49 has to be changed to 1 Other changes limitations to the circuit apply for more information see 7 5 System piping length limitations on page 11 2 62 Cooling and heating capacity...

Page 38: ...ble temp release differential AUX Heater is not allowed to energize when the outdoor ambient temp is recovered by differential below above the AUX Heater Max Allowable Temp AUX Heater Max Allowable te...

Page 39: ...ll automatically be set This will allow the auxiliary or secondary heat source to be automatically energized in the event of a system failure Error codes capable of auto backup are listed in the table...

Page 40: ...nsible mode is comfort feeling for the customer The selection method of indoor units is important and has to be considered as the available capacity is not the same as under basic operation For detail...

Page 41: ...n the situ ation When the request from the indoor units becomes more moderate the system will eventually go to the steady state condition which is defined by the operation method above The start up co...

Page 42: ...d field piping electrical wiring air purge etc See installation manual of the Branch Selector units and the indoor units for details CAUTION Do not insert fingers rods or other objects into the air in...

Page 43: ...ult idle situation is existing see 13 2 Operat ing the push buttons and DIP switches on the printed circuit board on page 24 Push BS2 for 5 seconds or more The unit will start test operation The test...

Page 44: ...n valve malfunction Y6E A7P X10A Check connection on printed circuit board or actuator 32 37 Electronic expansion valve malfunction Y7E A7P X11A Check connection on printed circuit board or actuator F...

Page 45: ...heck connection on printed circuit board or actuator JC 06 08 Low pressure sensor malfunction open circuit S1NPL A1P X31A Check connection on printed circuit board or actuator 07 09 Low pressure senso...

Page 46: ...ng connection are correct refer ring to the wiring diagram for Branch Selector units and correct if there are any errors Check that the DIP switches settings are correct referring to the installation...

Page 47: ...oor unit before starting service operation on the inverter equipment Be careful not to touch the live parts If a fan rotates due to strong wind it may store electricity in the capacitor or in the main...

Page 48: ...is not exceeded in the unlikely event of major leak in the system and this in accordance to the local applicable regulations and standards Maximum concentration level The maximum charge of refrigerant...

Page 49: ...3P477778 7G EM18A015 1901 HT 00_CV_3P477778 7G indd 2 12 11 2018 4 33 48 PM...

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