background image

14 Piping installation

Installation and operation manual

22

RWEYQ8~14T9Y1B

VRV IV water-cooled system air conditioner

4P452190-1D – 2020.10

▪ Install the joints horizontally, so that the caution label (a) attached

to the joint comes to the top.

▪ Do not tilt the joint more than 7.5° (see view A).

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

a

a

A

B

7.5°
7.5°

a

Caution label

X

Not allowed

O

Allowed

▪ Make sure that the total length of the piping connected to the joint

is absolute straight for more than 500 mm. Only if a straight field
piping of more than 120 mm is connected, more than 500 mm of
straight section can be ensured.

>120 mm

>500 mm

14.3.4

To connect the refrigerant branching kit

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

▪ Mount  the  refnet  joint  so  that  it  branches  either  horizontally  or

vertically.

▪ Mount the refnet header so that it branches horizontally.

A

B

±

3

a

b

c

a

a

Horizontal surface

b

Refnet joint mounted vertically

c

Refnet joint mounted horizontally

14.3.5

To protect against contamination

Seal  the  piping  and  wiring  intake  holes  using  sealing  material  (field
supply),  otherwise  the  capacity  of  the  unit  will  drop  and  small
animals may enter the machine.

14.3.6

Using the stop valve and service port

To handle the stop valve

Take the following guidelines into account:

▪ Make  sure  to  keep  the  appropriate  stop  valves  open  during

operation.  In  case  of  heat  pump  system,  the  gas  suction  stop
valve remains in the closed position.

▪ The gas and liquid stop valves are factory closed.

▪ Do  NOT  apply  excessive  force  to  the  stop  valve.  Doing  so  may

break the valve body.

To open the stop valve

1

Remove the stop valve cover.

2

Insert  a  hexagon  wrench  into  the  stop  valve  and  turn  the  stop
valve counterclockwise.

3

When the stop valve cannot be turned any further, stop turning.

4

Install the stop valve cover.

Result: 

The valve is now open.

To  fully  open  the  Ø19.1~Ø25.4  mm  stop  valve,  turn  the  hexagonal
wrench until a torque between 27 and 33 N•m is achieved.

Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.

To close the stop valve

1

Remove the stop valve cover.

2

Insert  a  hexagon  wrench  into  the  stop  valve  and  turn  the  stop
valve clockwise.

3

When the stop valve cannot be turned any further, stop turning.

4

Install the stop valve cover.

Result: 

The valve is now closed.

To handle the stop valve cover

▪ The  stop  valve  cover  is  sealed  where  indicated  by  the  arrow.  Do

NOT damage it.

▪ After  handling  the  stop  valve,  tighten  the  stop  valve  cover

securely,  and  check  for  refrigerant  leaks.  For  the  tightening
torque, refer to the table below.

Summary of Contents for VRV IV RWEYQ-T9

Page 1: ...lation and operation manual VRV IV water cooled system air conditioner English Installation and operation manual VRV IV water cooled system air conditioner RWEYQ8T9Y1B RWEYQ10T9Y1B RWEYQ12T9Y1B RWEYQ1...

Page 2: ...8 19 20 21 22 23 24 25 Directivelor cu amendamentele respective Direktive z vsemi spremembami Direktiivid koos muudatustega Direktyvose su papildymais Direkt v s un to papildin jumos Smernice v platno...

Page 3: ...S vastaava kyll stysl mp tila M C Kylm aine N Varmuuspainelaitteen asetus P bar Valmistusnumero ja valmistusvuosi katso mallin nimikilpi Maxim ln p pustn tlak PS K bar Minim ln maxim ln p pustn teplot...

Page 4: ...s not spin 13 8 2 15 Symptom The display shows 88 13 8 2 16 Symptom The compressor in the outdoor unit does not stop after a short heating operation 13 8 2 17 Symptom The inside of an outdoor unit is...

Page 5: ...r reference guide Preparation of the installation reference data Detailed step by step instructions and background information for basic and advanced usage Format Digital files on http www daikineurop...

Page 6: ...carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief CAUTION Do NOT perform the test operation while working on the indoor units When pe...

Page 7: ...ation CAUTION NEVER touch the internal parts of the controller Do NOT remove the front panel Some parts inside are dangerous to touch and appliance problems may happen For checking and adjusting the i...

Page 8: ...ices ventilate the room and contact the dealer where you purchased the unit Do not use the system until a service person confirms that the portion where the refrigerant leaks is repaired 4 About the s...

Page 9: ...ch 6 hours before operation 6 2 2 About cooling heating fan only and automatic operation Changeover cannot be made with a user interface whose display shows change over under centralised control refer...

Page 10: ...humidity in your room with minimal temperature decrease minimal room cooling The micro computer automatically determines temperature and fan speed cannot be set by the user interface The system does...

Page 11: ...ing for damage If damaged the unit may fall and result in injury NOTICE Do NOT wipe the controller operation panel with benzine thinner chemical dust cloth etc The panel may get discoloured or the coa...

Page 12: ...unit manual Malfunction Measure The system operates but cooling or heating is insufficient Check if air inlet or outlet of outdoor or indoor unit is not blocked by obstacles Remove any obstacles and m...

Page 13: ...stop Operation automatically restarts when the noise ceases 8 2 9 Symptom Noise of air conditioners Indoor unit A zeen sound is heard immediately after the power supply is turned on The electronic ex...

Page 14: ...b Installation manual and operation manual c Additional refrigerant charge label d Installation information sticker e Fluorinated greenhouse gases label f Multilingual fluorinated greenhouse gases la...

Page 15: ...ratures from 21 C DB to 32 C DB or 14 C WB to 25 C WB The ambient temperature around the unit should be above 0 C DB and below 40 C DB Relative humidity around the unit should be below 80 The water te...

Page 16: ...l the water piping and field wiring front plate B has to be removed 13 2 2 To open the electrical component box of the outdoor unit NOTICE Do NOT apply excessive force when opening the electronic comp...

Page 17: ...ery Determine the proper size using the following tables and reference figure only for indication In case of heat pump system A B B B C D F G E x y b a 3 1 2 4 5 1 2 VRV DX indoor unit 3 Branch select...

Page 18: ...ed on the total capacity of the connected indoor units only in case RA DX indoor units are connected Total capacity index of connected indoor units Piping outer diameter size mm Gas pipe Liquid pipe 2...

Page 19: ...ll the following restriction conditions A B C a c b A B C a To indoor units b Outdoor unit multi connecting piping kit first branch c Outdoor unit multi connecting piping kit second branch 14 2 Prepar...

Page 20: ...on the piping between this shut off valve and the outdoor unit for cleaning by chemicals For cleaning and water draining of the outdoor unit long period of non use or during non use in winter install...

Page 21: ...the design flow rate calculated by the hydronic engineer when designing the building system Correct valve selection is done when following conditions are met B C AND E A D For further selection requir...

Page 22: ...ay enter the machine 14 3 6 Using the stop valve and service port To handle the stop valve Take the following guidelines into account Make sure to keep the appropriate stop valves open during operatio...

Page 23: ...nect the vacuuming recovery unit through a manifold to the service port of all stop valves p p R410A N2 b c e a f g h d A C 1 D B a Pressure reducing valve b Nitrogen c Weighing scales d Refrigerant R...

Page 24: ...ant piping for example water may have entered the piping first carry out the vacuum drying procedure below until all moisture has been removed All piping inside the unit has been factory tested for le...

Page 25: ...for 1 hour the system may contain too much moisture In that case break the vacuum by pressurising with nitrogen gas to a gauge pressure of 0 05 MPa 0 5 bar and repeat steps 1 to 3 until all moisture h...

Page 26: ...additional 0 5 kg of refrigerant per outdoor unit In case of heat recovery system Formula R X1 22 2 0 37 X2 19 1 0 26 X3 15 9 0 18 X4 12 7 0 12 X5 9 5 0 059 X6 6 4 0 022 1 04 A C R Additional refriger...

Page 27: ...ks to each outdoor unit NOTICE The refrigerant charging port is connected to the piping inside the unit The unit s internal piping is already factory charged with refrigerant so be careful when connec...

Page 28: ...flow rate is correct If not stop the pump immediately and carry out troubleshooting 14 6 4 To insulate the water piping The outdoor water piping MUST be insulated to prevent condensation during heatin...

Page 29: ...g In case of heat recovery system B i a b f c f e g d c h j j i a Field power supply with earth leakage protector b Main switch c Earth connection d Outdoor unit e Indoor unit f User interface g BS un...

Page 30: ...es using finishing tape as shown in figure below b a f c d f e f a Liquid pipe b Gas pipe c Finishing tape d High pressure low pressure gas pipe e Transmission wiring F1 F2 f Insulator 15 6 To route a...

Page 31: ...e closed valve Select a flow switch contact of at least 15 V DC 1 mA Connect the flow switch to X2M terminals 5 and 6 In case of a multi outdoor unit system install one or more flow switches depending...

Page 32: ...ng the current field setting value is possible In general normal operation can be resumed without special intervention after changing field settings Some field settings are used for special operation...

Page 33: ...atus of the unit What How Changing and accessing the setting in mode 1 Once mode 1 is selected push BS1 one time you can select the wanted setting It is done by pushing BS2 Accessing the selected sett...

Page 34: ...m 3 Each unit has a pump valve pump is OFF when slave unit does not operate Minimum water flow rate limit control To change the minimum water flow rate limit of the variable flow system change the set...

Page 35: ...tion Check that the unit is properly installed to avoid abnormal noises and vibrations when starting up the unit Field wiring Be sure that the field wiring has been carried out according to the instru...

Page 36: ...s 17 4 To perform a test run 1 Close all front panels in order to not let it be the cause of misjudgement except the electrical component box inspection opening service cover 2 Make sure all field set...

Page 37: ...site publicly accessible The full set of latest technical data is available on the Daikin Business Portal authentication required 19 1 Service space Outdoor unit Make sure the space around the unit is...

Page 38: ...pressor Double tube heat exchanger Liquid receiver Thermistor 20 Disposal NOTICE Do NOT try to dismantle the system yourself dismantling of the system treatment of the refrigerant oil and other parts...

Page 39: ......

Page 40: ...4P452190 1D 2020 10 Copyright 2017 Daikin 4P452190 1 D 0000000 Verantwortung f r Energie und Umwelt...

Reviews: