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14 Piping installation

Installation and operation manual

20

RWEYQ8~14T9Y1B

VRV IV water-cooled system air conditioner

4P452190-1D – 2020.10

a

Air purge (field supply)

b

Water outlet

c

Water inlet

d

Shut-off valve (field supply)

e

Water connection

f

Water piping (field supply)

g

Insulation (field supply)

h

Heat exchanger

i

Filter (accessory)

j

Drain valve (field supply)

k

Drain connection

l

Insulation cover

Water  pump.

  After  filling  the  water  piping,  run  the  water  pump

(field  supply)  to  flush  the  water  piping.  After  flushing,  clean  the
filter.

Freeze.

 Protect against freezing.

Water pipes.

 ALWAYS comply with local and national regulations.

Water  piping 

  Tightening  torque

.  Securely  tighten  the  water

piping with a tightening torque of ≤300 N•m. Overtightening results
in damage to the unit.

Field  supply  components  –  Water.

  Only  use  materials  that  are

compatible  with  water  used  in  the  system  and  with  the  materials
used in the outdoor unit.

Field supply components – Water pressure and temperature.

Check  that  all  components  in  the  field  piping  can  withstand  the
water pressure and water temperature.

Water pressure.

 The maximum water pressure is 37 bar. Provide

adequate  safeguards  in  the  water  circuit  to  ensure  that  the
maximum pressure is NOT exceeded.

Drainage – Low points.

 Provide drain taps at all low points of the

system in order to allow complete drainage of the water circuit.

Drainage  –  Clogging.

  Make  sure  that  the  water  runs  smoothly

without any clogging by dirt.

Drainage 

  Lateral  length

.  Lateral  length  of  drainage  should  be

as  short  as  possible  (≤400  mm)  and  installed  in  a  downward
direction. The diameter of the drain pipe must be the same as the
diameter of the pipe on the outdoor unit.

Non-brass  metallic  piping.

  When  using  non-brass  metallic

piping,  insulate  the  brass  and  non-brass  properly  so  that  they  do
NOT  make  contact  with  each  other.  This  to  prevent  galvanic
corrosion.

14.2.2

Handling the brazed plate heat exchanger

INFORMATION

A  brazed  plate  heat  exchanger  is  used.  Because  of  a
different  structure  from  a  conventional  heat  exchanger,  it
MUST be handled in a different manner.

▪ Install  a  water  filter  at  the  water  inlet  in  order  to  prevent  foreign

materials  such  as  dust,  sand,…  from  entering  the  plate  heat
exchanger.

▪ Scale  can  stick  to  the  plate  heat  exchanger  depending  on  water

quality.  To  remove  scale,  cleaning  is  necessary  at  regular
intervals using chemicals. Install a shut-off valve at the end in the
water  piping.  Install  a  piping  connection  port  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 an air purge plug (for
joint  use  with  cleaning  port)  (field  supply)  and  a  water  draining
plug at the inlet/outlet ports of the water piping. Additionally, install
an  automatic  air  purge  valve  (field  supply)  at  the  top  of  rising
piping or at the top of a portion where air tends to stay.

▪ Install  an  additional  cleanable  filter  (field  supply)  in  front  of  the

pump inlet.

▪ Carry  out  complete  cooling/thermal  insulation  of  the  water  piping

and the outdoor unit drain piping. If insulation has not been carried
out,  the  unit  may  sustain  damage  during  severe  winters  due  to
freezing, in addition to thermal loss.

▪ When  you  stop  the  unit  during  night  or  winter,  take  measures  to

prevent  water  circuits  from  natural  freezing  in  areas  where  the
ambient temperature drops below 0°C (by water drain off, keeping
the  circulation  pump  running,  warming  up  by  a  heater,…).
Freezing of water circuits may result in damage to the plate heat
exchanger.  Therefore,  take  appropriate  measures  depending  on
the circumstances.

a

b

c

d

e  

a

Water inlet piping

b

Filter (accessory)

c

Air purge plug (for joint use with cleaning port) (field
supply)

d

Cleaning device

e

Filter for pump (field supply)

f

Automatic air purge valve (field supply)

g

Water outlet piping

h

Joint use with water draining plug

i

Plate heat exchanger

14.2.3

About the water flow rate

The RWEYQ*T9Y1B models are equipped with the logic to operate
with a variable water flow rate function.

a
b

c

a

Constant flow

b

Flow regulating valve (field supply)

c

Inverter pump (field supply)

A system can either be configured as a constant flow system (a), a
variable  flow  system  with  valve  (b)  or  a  variable  flow  system  with  a
pump (c).

▪ Constant  flow  system  (a):  the  variable  water  flow  rate  function  is

not used.

▪ A  pressure  independent  flow  regulating  valve  (b):  the  valve

controls  the  flow  rate  of  a  centralized  inverter  pump  through  the
unit.

▪ Inverter  pump  (c):  the  pump  directly  controls  the  water  flow  rate

through the unit.

To  activate  the  variable  flow  system,  change  field  setting  [2-24]  to
the applicable value. See 

"16.1 Making field settings"

 [

4

 32].

NOTICE

Make  sure  that  all  field  supplied  equipment  for  variable
flow rate can be switched off together with the outdoor unit.
This is required when cleaning the plate heat exchanger.

NOTICE

Make  sure  that  all  field  supplied  equipment  for  variable
flow  rate  meet  the  minimum  hydronic  and  electric
specifications.  Failure  to  do  so  can  result  in  inefficient
operation or even breakdown of the system.

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...

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