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1 General safety precautions

Installer reference guide

3

ARXM25~3RXM20~35N2V1B9
R32 split series
4P518023-5C – 2018.09

▪ The  installation  of  the  system,  and  all  activities  described  in  the

installation  manual  and  the  installer  reference  guide  MUST  be
performed by an authorised installer.

1.1.1

Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

DANGER: RISK OF ELECTROCUTION

Indicates a situation that could result in electrocution.

DANGER: RISK OF BURNING

Indicates a situation that could result in burning because of
extreme hot or cold temperatures.

DANGER: RISK OF EXPLOSION

Indicates a situation that could result in explosion.

WARNING

Indicates  a  situation  that  could  result  in  death  or  serious
injury.

WARNING: FLAMMABLE MATERIAL

CAUTION

Indicates a situation that could result in minor or moderate
injury.

NOTICE

Indicates  a  situation  that  could  result  in  equipment  or
property damage.

INFORMATION

Indicates useful tips or additional information.

Symbol

Explanation

Before installation, read the installation and
operation manual, and the wiring instruction sheet.

Before performing maintenance and service tasks,
read the service manual.

For more information, see the installer and user
reference guide.

1.2

For the installer

1.2.1

General

If  you  are  NOT  sure  how  to  install  or  operate  the  unit,  contact  your
dealer.

NOTICE

Improper  installation  or  attachment  of  equipment  or
accessories  could  result  in  electric  shock,  short-circuit,
leaks,  fire  or  other  damage  to  the  equipment.  Only  use
accessories,  optional  equipment  and  spare  parts  made  or
approved by Daikin.

WARNING

Make  sure  installation,  testing  and  applied  materials
comply  with  applicable  legislation  (on  top  of  the
instructions described in the Daikin documentation).

CAUTION

Wear  adequate  personal  protective  equipment  (protective
gloves,  safety  glasses,…)  when  installing,  maintaining  or
servicing the system.

WARNING

Tear apart and throw away plastic packaging bags so that
nobody,  especially  children,  can  play  with  them.  Possible
risk: suffocation.

DANGER: RISK OF BURNING

▪ Do  NOT  touch  the  refrigerant  piping,  water  piping  or

internal parts during and immediately after operation. It
could  be  too  hot  or  too  cold.  Give  it  time  to  return  to
normal  temperature.  If  you  must  touch  it,  wear
protective gloves.

▪ Do NOT touch any accidental leaking refrigerant.

WARNING

Provide adequate measures to prevent that the unit can be
used  as  a  shelter  by  small  animals.  Small  animals  that
make contact with electrical parts can cause malfunctions,
smoke or fire.

CAUTION

Do NOT touch the air inlet or aluminium fins of the unit.

NOTICE

▪ Do  NOT  place  any  objects  or  equipment  on  top  of  the

unit.

▪ Do NOT sit, climb or stand on the unit.

NOTICE

Works  executed  on  the  outdoor  unit  are  best  done  under
dry weather conditions to avoid water ingress.

In  accordance  with  the  applicable  legislation,  it  might  be  necessary
to provide a logbook with the product containing at least: information
on maintenance, repair work, results of tests, stand-by periods,…

Also,  at  least,  following  information  MUST  be  provided  at  an
accessible place at the product:

▪ Instructions for shutting down the system in case of an emergency

▪ Name and address of fire department, police and hospital

▪ Name,  address  and  day  and  night  telephone  numbers  for

obtaining service

In Europe, EN378 provides the necessary guidance for this logbook.

1.2.2

Installation site

▪ Provide  sufficient  space  around  the  unit  for  servicing  and  air

circulation.

▪ Make  sure  the  installation  site  withstands  the  unit's  weight  and

vibration.

▪ Make  sure  the  area  is  well  ventilated.  Do  NOT  block  any

ventilation openings.

▪ Make sure the unit is level.

Do NOT install the unit in the following places:

▪ In potentially explosive atmospheres.

▪ In  places  where  there  is  machinery  that  emits  electromagnetic

waves.  Electromagnetic  waves  may  disturb  the  control  system,
and cause malfunction of the equipment.

Summary of Contents for ARXM25N2V1B9

Page 1: ...Installer reference guide R32 split series English Installer reference guide R32 split series ARXM25N2V1B9 ARXM35N2V1B9 RXM20N2V1B9 RXM25N2V1B9 RXM35N2V1B9 ...

Page 2: ...3 To check for leaks 15 6 5 4 To perform vacuum drying 15 6 6 Charging refrigerant 16 6 6 1 About charging refrigerant 16 6 6 2 About the refrigerant 16 6 6 3 Precautions when charging refrigerant 16 6 6 4 To determine the additional refrigerant amount 16 6 6 5 To determine the complete recharge amount 17 6 6 6 To charge additional refrigerant 17 6 6 7 To fix the fluorinated greenhouse gases label...

Page 3: ...fety glasses when installing maintaining or servicing the system WARNING Tear apart and throw away plastic packaging bags so that nobody especially children can play with them Possible risk suffocation DANGER RISK OF BURNING Do NOT touch the refrigerant piping water piping or internal parts during and immediately after operation It could be too hot or too cold Give it time to return to normal temp...

Page 4: ...f pipework shall be kept to a minimum WARNING If appliances contain R32 refrigerant the floor area of the room in which the appliances are installed operated and stored MUST be larger than the minimum floor area defined in table below A m2 This applies to Indoor units without a refrigerant leakage sensor in case of indoor units with refrigerant leakage sensor consult the installation manual Outdoo...

Page 5: ...ntilate the area immediately Possible risks Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency Toxic gas may be produced if refrigerant gas comes into contact with fire DANGER RISK OF EXPLOSION Pump down Refrigerant leakage If you want to pump down the system and there is a leak in the refrigerant circuit Do NOT use the unit s automatic pump down function with whic...

Page 6: ...g WARNING ONLY use copper wires Make sure the field wiring complies with the applicable legislation All field wiring MUST be performed in accordance with the wiring diagram supplied with the product NEVER squeeze bundled cables and make sure they do NOT come in contact with the piping and sharp edges Make sure no external pressure is applied to the terminal connections Make sure to install earth w...

Page 7: ...ical data is available on the regional Daikin website publicly accessible The full set of latest technical data is available on the Daikin extranet authentication required 2 2 Installer reference guide at a glance Chapter Description General safety precautions Safety instructions that you MUST read before installing About the documentation What documentation exists for the installer About the box ...

Page 8: ... 1 Overview About the unit This chapter contains information about Identification of the outdoor unit 4 2 Identification NOTICE When installing or servicing several units at the same time make sure NOT to switch the service panels between different models 4 2 1 Identification label Outdoor unit Location 5 Preparation 5 1 Overview Preparation This chapter describes what you have to do and know befo...

Page 9: ...ir inlet NOTICE The height of the wall on the outlet side of the outdoor unit MUST be 1200 mm NOTICE Do NOT stack the units on each other Do NOT hang the unit on a ceiling Strong winds 18 km h blowing against the outdoor unit s air outlet causes short circuit suction of discharge air This may result in deterioration of the operational capacity frequent frost acceleration in heating operation disru...

Page 10: ...ssible make sure that the heat exchanger coil is NOT affected by the snow If necessary install a snow cover or shed and a pedestal 5 2 3 Refrigerant piping length and height difference What Distance Maximum allowable pipe length 20 m Minimum allowable pipe length 1 5 m Maximum allowable height difference 15 m 5 3 Preparing refrigerant piping 5 3 1 Refrigerant piping requirements INFORMATION Also r...

Page 11: ... you have to do and know on site to install the system Typical workflow Installation typically consists of the following stages 1 Opening the unit 2 Mounting the outdoor unit 3 Connecting the refrigerant piping 4 Checking the refrigerant piping 5 Charging refrigerant 6 Connecting the electrical wiring 7 Finishing the outdoor unit installation 6 2 Opening the unit 6 2 1 About opening the unit At ce...

Page 12: ...f the unit in order to prevent water from getting into the unit and to avoid drain water dripping see the following figure NOTICE If the unit is installed in a cold climate take adequate measures so that the evacuated condensate CANNOT freeze INFORMATION For information on the available options contact your dealer NOTICE Provide at least 300 mm of free space below the unit Additionally make sure t...

Page 13: ...tection method Outdoor unit 1 month Pinch the pipe 1 month Pinch or tape the pipe Indoor unit Regardless of the period INFORMATION Do NOT open the refrigerant stop valve before checking the refrigerant piping When you need to charge additional refrigerant it is recommended to open the refrigerant stop valve after charging WARNING Connect the refrigerant piping securely before running the compresso...

Page 14: ... stem cap as this could cause a refrigerant leak a b a Spanner b Torque wrench When it is expected that the operating pressure will be low e g when cooling will be performed while the outside air temperature is low sufficiently seal the flare nut in the stop valve on the gas line with silicon sealant to prevent freezing Silicon sealant make sure there is no gap To open close the stop valve 1 Remov...

Page 15: ... same pump for other refrigerants may damage the pump and the unit NOTICE Connect the vacuum pump to the service port of the gas stop valve Make sure that the gas stop valve and liquid stop valve are firmly closed before performing the leak test or vacuum drying 6 5 3 To check for leaks NOTICE Do NOT exceed the unit s maximum working pressure see PS High on the unit name plate NOTICE Make sure to ...

Page 16: ... on the outdoor unit s internal refrigerant piping is performed NOTICE Before completely recharging perform vacuum drying on the outdoor unit s internal refrigerant piping as well Typical workflow Completely recharging refrigerant typically consists of the following stages 1 Determining how much refrigerant to charge 2 Charging refrigerant 3 Filling in the fluorinated greenhouse gases label and fi...

Page 17: ...m expressed as tonnes CO2 equivalent is used to determine the maintenance intervals Follow the applicable legislation Formula to calculate the greenhouse gas emissions GWP value of the refrigerant Total refrigerant charge in kg 1000 2 Fix the label on the inside of the outdoor unit near the gas and liquid stop valves 6 7 Connecting the electrical wiring 6 7 1 About connecting the electrical wiring...

Page 18: ...single core wire b Screw c Flat washer Stranded conductor wire with round crimp style terminal c b b a c a B B a Terminal b Screw c Flat washer O Allowed X NOT allowed Tightening torques Item Tightening torque N m M4 X1M 1 5 1 6 M4 earth 1 4 1 5 If single core wires are used be sure to curl the end of the lead Improper work may cause heat or fire The earth wire between the wire retainer and the te...

Page 19: ...s of the following stages 1 Checking the Checklist before commissioning 2 Performing a test run for the system 7 2 Precautions when commissioning DANGER RISK OF ELECTROCUTION DANGER RISK OF BURNING CAUTION Do NOT perform the test operation while working on the indoor units When performing the test operation NOT only the outdoor unit but the connected indoor unit will operate as well Working on an ...

Page 20: ...city When the power turns back on after a power break the previously selected mode will be resumed 7 6 Starting up the outdoor unit See the indoor unit installation manual for configuration and commissioning of the system 8 Configuration 8 1 Facility setting Use this function for cooling at low outdoor temperature This function is designed for facilities such as equipment of computer rooms NEVER u...

Page 21: ...scribes what you have to do in case of problems It contains information about solving problems based on symptoms Before troubleshooting Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring 11 2 Precautions when troubleshooting WARNING When carrying out an inspection on the switch box of the unit ALWAYS make sure that the unit...

Page 22: ...u want to pump down the system and there is a leak in the refrigerant circuit Do NOT use the unit s automatic pump down function with which you can collect all refrigerant from the system into the outdoor unit Possible consequence Self combustion and explosion of the compressor because of air going into the operating compressor Use a separate recovery system so that the unit s compressor does NOT ...

Page 23: ...r the procedure refer to To perform a test run in the installation manual of the indoor unit Note Forced cooling will stop automatically after around 30 minutes 2 To stop operation sooner press the ON OFF switch INFORMATION If forced cooling is used and the outside temperature is 10 C the safety device may prevent operation Warm the outside temperature thermistor on the outdoor unit to 10 C Result...

Page 24: ...H E H HEATER F U FU FOR CHARACTERISTICS FUSE REFER TO PCB INSIDE YOUR UNIT FG CONNECTOR FRAME GROUND H HARNESS H P LED V L PILOT LAMP LIGHT EMITTING DIODE HAP LIGHT EMITTING DIODE SERVICE MONITOR GREEN HIGH VOLTAGE HIGH VOLTAGE IES INTELLIGENT EYE SENSOR IPM INTELLIGENT POWER MODULE K R KCR KFR KHuR K M MAGNETIC RELAY L LIVE L COIL L R REACTOR M STEPPER MOTOR M C COMPRESSOR MOTOR M F FAN MOTOR M P...

Page 25: ... or application explaining how to install configure and maintain it Operation manual Instruction manual specified for a certain product or application explaining how to operate it Maintenance instructions Instruction manual specified for a certain product or application which explains if relevant how to install configure operate and or maintain the product or application Accessories Labels manuals...

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Page 28: ...4P518023 5C 2018 09 Copyright 2018 Daikin ...

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