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5 Piping installation

Installation manual

14

50A9

R32 Split series

3P600450-8T – 2022.09

Reducer type

Connection

2

Ø12.7 mm → Ø9.5 mm

Connection example:

▪ Connecting a Ø9.5 mm pipe to a Ø12.7 mm gas pipe connection

port

a

b

d

e

c

a

Outdoor unit connection port

b

Reducer type 1

c

Reducer type 2

d

Flare nut for Ø12.7 mm

e

Inter-unit piping

Coat the threaded connection port of the outdoor unit where the flare
nut comes in with refrigeration oil.

Flare nut for (mm)

Tightening torque (N•m)

Ø12.7

50~60

NOTICE

Use  an  appropriate  wrench  to  avoid  damaging  the
connection  thread  by  overtightening  the  flare  nut.  Be
careful NOT to overtighten the nut, or the smaller pipe may
be damaged (about 2/3-1× the normal torque).

5.2.2

To connect the refrigerant piping to the
outdoor unit

Piping length.

 Keep field piping as short as possible.

Piping  protection.

  Protect  the  field  piping  against  physical

damage.

WARNING

Connect the refrigerant piping securely before running the
compressor. If the refrigerant piping is NOT connected and
the stop valve is open when the compressor is run, air will
be  sucked  in.  This  will  cause  abnormal  pressure  in  the
refrigeration cycle, which may result in equipment damage
and even injury.

NOTICE

▪ Use the flare nut fixed to the main unit.

▪ To  prevent  gas  leakage,  apply  refrigeration  oil  only  to

the  inside  of  the  flare.  Use  refrigeration  oil  for  R32
(

Example: 

 FW68DA).

▪ Do NOT reuse joints.

1

Connect the liquid refrigerant connection from the indoor unit to
the liquid stop valve of the outdoor unit.

e

a

b

c

d

a

Liquid stop valve (room A)

b

Gas stop valve (room A)

c

Liquid stop valve (room B)

d

Gas stop valve (room B)

e

Service port

2

Connect  the  gas  refrigerant  connection  from  the  indoor  unit  to
the gas stop valve of the outdoor unit.

NOTICE

It  is  recommended  that  the  refrigerant  piping  between
indoor  and  outdoor  unit  is  installed  in  a  ducting  or  the
refrigerant piping is wrapped with finishing tape.

5.3

Checking the refrigerant piping

5.3.1

To check for leaks

NOTICE

Do NOT exceed the unit's maximum working pressure (see
"PS High" on the unit name plate).

NOTICE

ALWAYS  use  a  recommended  bubble  test  solution  from
your wholesaler.

NEVER use soap water:

▪ Soap  water  may  cause  cracking  of  components,  such

as flare nuts or stop valve caps.

▪ Soap  water  may  contain  salt,  which  absorbs  moisture

that will freeze when the piping gets cold.

▪ Soap  water  contains  ammonia  which  may  lead  to

corrosion  of  flared  joints  (between  the  brass  flare  nut
and the copper flare).

1

Charge the system with nitrogen gas up to a gauge pressure of
at  least  200  kPa  (2  bar).  It  is  recommended  to  pressurize  to
3000 kPa (30 bar) in order to detect small leaks.

2

Check  for  leaks  by  applying  the  bubble  test  solution  to  all
connections.

3

Discharge all nitrogen gas.

5.3.2

To perform vacuum drying

DANGER: RISK OF EXPLOSION

Do NOT open the stop valves before the vacuum drying is
finished.

NOTICE

Connect the vacuum pump to 

both

 the service ports of the

gas stop valves.

1

Vacuum the system until the pressure on the manifold indicates
−0.1 MPa (−1 bar).

2

Leave as is for 4-5 minutes and check the pressure:

If the pressure…

Then…

Does not change

There is no moisture in the
system. This procedure is
finished.

Increases

There is moisture in the
system. Go to the next step.

3

Vacuum the system for at least 2 hours to a manifold pressure
of −0.1 MPa (−1 bar).

4

After  turning  the  pump  OFF,  check  the  pressure  for  at  least
1 hour.

5

If  you  do  NOT  reach  the  target  vacuum  or  CANNOT  maintain
the vacuum for 1 hour, do the following:

Summary of Contents for 2MXM40A2V1B9

Page 1: ...Installation manual R32 Split series English Installation manual R32 Split series 2MXM40A2V1B9 2MXM50A2V1B9 ...

Page 2: ...gimusel et neid kasutatakse vastavuses meie juhistele са в съответствие със следната директива и или регламент и при условие че продуктите се използват в съответствие с нашите инструкции atitinka toliau nurodytas direktyvas arba reglamentus su sąlyga kad gaminiai bus eksploatuojami laikantis mūsų instrukcijų atbilst šādām direktīvām vai regulām ja vien šie izstrādājumi tiek lietoti saskaņā ar mūsu...

Page 3: ...tagelse af enligt bestämmelserna för i henhold til bestemmelsene i noudattaen säännöksiä za dodržení ustanovení prema odredbama követi a z zgodnie z postanowieniami urmând prevederile 19 20 21 22 23 24 25 v skladu z določbami vastavalt nõuetele следвайки клаузите на vadovaujantis šio dokumento nuostatomis atbilstoši šādu standartu prasībām nasledovnými ustanoveniami şu standartların hükümlerine EN...

Page 4: ...nstilling av sikkerhetsanordning for trykk P bar Produksjonsnummer og produksjonsår se modellens merkeplate Suurin sallittu paine PS K bar Pienin suurin sallittu lämpötila TS TSmin Alhaisin matalapainepuolen lämpötila L C TSmax Suurinta sallittua painetta PS vastaava kyllästyslämpötila M C Kylmäaine N Varmuuspainelaitteen asetus P bar Valmistusnumero ja valmistusvuosi katso mallin nimikilpi Maximá...

Page 5: ...08 1597 Supply of Machinery Safety Regulations 2008 S I 2016 1101 Electrical Equipment Safety Regulations 2016 S I 2016 1091 Electromagnetic Compatibility Regulations 2016 following the provisions of BS EN 60335 2 40 A B C DAIKIN TCF 032E23 11 2022 as set out in A and judged positively by B according to the Certificate C DICz is authorised to compile the Technical Construction File DICz Daikin Ind...

Page 6: ...ctrical Equipment Safety Regulations 2016 S I 2016 1091 Electromagnetic Compatibility Regulations 2016 following the provisions of BS EN 60335 2 40 A B C DAIKIN TCF 032E23 11 2022 D DAIKIN TCF PED 0146B E HPi Verification Services Ltd NB1521 F D1 G II H as set out in A and judged positively by B according to the Certificate C as set out in the Technical Construction File D and judged positively by...

Page 7: ...urated temperature corresponding with the maximum allowable pressure PS M C Refrigerant N Setting of pressure safety device P bar Manufacturing number and manufacturing year refer to model nameplate Q HPi Verification Services Ltd The Manor House Howbery Business Park Wallingford OX10 8BA United Kingdom Name and address of the Notified body that judged positively on compliance with the Pressure Eq...

Page 8: ...fore commissioning 19 10 2 Checklist during commissioning 19 10 3 Trial operation and testing 19 10 3 1 To perform a test run 19 11 Maintenance and service 20 12 Disposal 20 13 Technical data 20 13 1 Wiring diagram 20 13 1 1 Unified wiring diagram legend 20 13 2 Piping diagram Outdoor unit 21 1 About the documentation 1 1 About this document WARNING Make sure installation servicing maintenance rep...

Page 9: ...ct the refrigerant piping securely before running the compressor If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run air will be sucked in This will cause abnormal pressure in the refrigeration cycle which may result in equipment damage and even injury CAUTION Incomplete flaring may cause refrigerant gas leakage Do NOT re use flares Use new flares to pr...

Page 10: ...let or outlet Do NOT remove the fan guard When the fan is rotating at high speed it will cause injury Maintenance and service see 11 Maintenance and service 420 DANGER RISK OF ELECTROCUTION DANGER RISK OF BURNING SCALDING WARNING Before carrying out any maintenance or repair activity ALWAYS switch off the circuit breaker on the supply panel remove the fuses or open the protection devices of the un...

Page 11: ... 300 mm of work space below the ceiling surface and 250 mm for piping and electrical servicing b a b c a Baffle plate b Prevailing wind direction c Air outlet Do NOT install the unit in sound sensitive areas e g near a bedroom so that the operation noise will cause no trouble Note If the sound is measured under actual installation conditions the measured value might be higher than the sound pressu...

Page 12: ...des proper drainage Prepare 4 sets of M8 or M10 anchor bolts nuts and washers field supply 20 mm mm 311 5 7 4 2 4 0 2 4 0 a a 100 mm above expected level of snow 4 2 2 To install the outdoor unit 4 M8 M10 4 2 3 To provide drainage NOTICE If the unit is installed in a cold climate take adequate measures so that the evacuated condensate CANNOT freeze NOTICE If the drain holes of the outdoor unit are...

Page 13: ...e thermal insulation pipes for the gas and liquid refrigerant piping 5 1 3 Refrigerant piping length and height difference The shorter the refrigerant piping the better the performance of the system The piping length and height differences must comply with the following requirements Shortest allowable length per room is 3 m Refrigerant piping length to each indoor unit 20 m Refrigerant piping tota...

Page 14: ... Connect the gas refrigerant connection from the indoor unit to the gas stop valve of the outdoor unit NOTICE It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape 5 3 Checking the refrigerant piping 5 3 1 To check for leaks NOTICE Do NOT exceed the unit s maximum working pressure see PS High...

Page 15: ...t in severe wounds caused by frostbite NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent Formula to calculate the quantity in CO2 equivalent tonnes GWP value of the refrigerant total refrigerant charge in kg 1000 Contact your installer for more information 6 2 To determine the additional ref...

Page 16: ...ategory III WARNING If the supply cord is damaged it MUST be replaced by the manufacturer its service agent or similarly qualified persons in order to avoid a hazard WARNING Do NOT connect the power supply to the indoor unit This could result in electrical shock or fire WARNING Do NOT use locally purchased electrical parts inside the product Do NOT branch the power supply for the drain pump etc fr...

Page 17: ...ice d Power supply wire e Interconnection wire for room A B f Wire retainer 4 Tighten the terminal screws securely using a Phillips screwdriver 5 Check that the wires do not disconnect by pulling them lightly 6 Firmly secure the wire retainer to avoid external stress on wire terminations 7 Pass the wiring through the cutout on the bottom of the protection plate 8 Make sure the electrical wiring do...

Page 18: ...nd the electric box cover CAUTION When reinstalling the electric box cover be careful not to pinch the fan motor lead wire 9 3 About heat mode lock Heat mode lock limits the unit to heat operation 9 3 1 To turn ON heat mode lock 1 Remove the top plate 2 screws and the front plate 8 screws 2 To set heat mode lock remove the S99 connector 3 To reset the heat pump mode cooling heating plug the connec...

Page 19: ...d piping match for each indoor unit Check if the priority room setting is set for 2 or more rooms Keep in mind that the DHW generator for Multi or the Hybrid for Multi shall not be selected as the priority room 10 2 Checklist during commissioning To perform a wiring check To perform an air purge To perform a test run 10 3 Trial operation and testing Before starting the test run measure the voltage...

Page 20: ...ide 13 Technical data A subset of the latest technical data is available on the regional Daikin website publicly accessible The full set of latest technical data is available on the Daikin Business Portal authentication required 13 1 Wiring diagram The wiring diagram is delivered with the unit located inside of the outdoor unit bottom side of the top plate 13 1 1 Unified wiring diagram legend For ...

Page 21: ...ensor S W SW Operation switch SA F1S Surge arrester SR WLU Signal receiver SS Selector switch SHEET METAL Terminal strip fixed plate T R Transformer TC TRC Transmitter V R V Varistor V R Diode bridge Insulated gate bipolar transistor IGBT power module WRC Wireless remote controller X Terminal X M Terminal strip block Y E Electronic expansion valve coil Y R Y S Reversing solenoid valve coil Z C Fer...

Page 22: ...d b High pressure switch with automatic reset n Filter c Muffler o Motor operated valve d Discharge pipe thermistor p Muffler e Compressor q Outdoor air temperature thermistor f Accumulator r Heat exchanger g Branch pipe M Fan motor h Thermistor gas Refrigerant flow cooling i Gas stop valve Refrigerant flow heating j Field piping gas ...

Page 23: ......

Page 24: ...3P600450 8T 2022 09 Copyright 2022 Daikin Verantwortung für Energie und Umwelt ...

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