Daikin VRV IV Installer And User Reference Manual
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Daikin VRV IV Installer And User Reference Manual

System air conditioner
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RXMLQ8T7Y1B*
RXYLQ10T7Y1B*
RXYLQ12T7Y1B*
RXYLQ14T7Y1B*
Installer and user reference guide
VRV IV system air conditioner

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Summary of Contents for Daikin VRV IV

  • Page 1 Installer and user reference guide VRV IV system air conditioner RXMLQ8T7Y1B* RXYLQ10T7Y1B* RXYLQ12T7Y1B* RXYLQ14T7Y1B*...

  • Page 2: Table Of Contents

    Symptom: Fan operation is possible, but cooling and heating do not work ..........43 11.2.4 Symptom: The fan speed does not correspond to the setting..............43 Installer and user reference guide RXMLQ8 + RXYLQ10~14T7Y1B* VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 3 14 Technical data 14.1 Information requirements for Eco Design........................48 For the installer 15 About the box 15.1 About LOOP BY DAIKIN ..............................50 15.2 Overview: About the box ..............................50 15.3 To unpack the outdoor unit............................51 15.4 To remove the accessories from the outdoor unit ......................51 15.5...
  • Page 4 Correcting after abnormal completion of the test run ....................137 21.7 Operating the unit................................137 22 Hand-over to the user 23 Maintenance and service 23.1 Maintenance safety precautions............................ 139 Installer and user reference guide RXMLQ8 + RXYLQ10~14T7Y1B* VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 5 26 Technical data 26.1 Service space: Outdoor unit ............................149 26.2 Piping diagram: Outdoor unit ............................151 26.3 Wiring diagram: Outdoor unit ............................151 27 Glossary RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 6: About The Documentation

    The original documentation is written in English. All other languages are translations. Technical engineering 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).
  • Page 7 Example: " 1–3 Figure title" means "Figure 3 in chapter 1". Indicates a table title or a reference to it. Example: " 1–3 Table title" means "Table 3 in chapter 1". RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 8: General Safety Precautions

    Improper installation or attachment of equipment or accessories could result in electrical 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).

  • Page 9: Installation Site

    Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard. NOTICE Make sure the field piping and connections are NOT subjected to stress. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 10 Only use tools exclusively for the refrigerant type used in the system, this to ensure pressure resistance and prevent foreign materials from entering into the system. ▪ Charge the liquid refrigerant as follows: RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 11: Electrical

    If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 12 Install power cables at least 1  m away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1  m may not be sufficient. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 13 Running the product in reversed phase can break the compressor and other parts. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 14: Specific Installer Safety Instructions

    If these instructions are NOT followed correctly it may result in property damage or personal injury, which may be serious depending on the circumstances. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 15 ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. WARNING ALWAYS use multicore cable for power supply cables. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 16 Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT remove the fan guard. When the fan is rotating at high speed, it will cause injury. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 17: For The User

    For the user RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 18: User Safety Instructions

    CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 19: Instructions For Safe Operation

    CAUTION It is unhealthy to expose your body to the air flow for a long time. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 20 Use of wire or copper wire may cause the unit to break down or cause a fire. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 21 NEVER expose little children, plants or animals directly to the airflow. CAUTION Do NOT touch the heat exchanger fins. These fins are sharp and could result in cutting injuries. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 22: About The System

    Contact your installer to receive more information and professional advice. In general following type of indoor units can be connected to a VRV IV heat pump system (not exhaustive list, depending on outdoor unit model and indoor unit model combinations): ▪...

  • Page 23: System Layout

    Depending on the type of outdoor unit which is chosen, some functionality will or will not exist. It will be indicated throughout this operation manual when certain features have exclusive model rights or not. a VRV IV Heat pump outdoor unit b Refrigerant piping c VRV direct expansion (DX) indoor unit...

  • Page 24: User Interface

    Detailed information on required actions to achieve certain functions can be found in the dedicated installation and operation manual of the indoor unit. Refer to the operation manual of the installed user interface. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 25: Before Operation

    Heating and cooling (air to water). Dedicated functions exist depending on the type of indoor unit, refer to dedicated installation/operation manual for more information. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 26: Operation

    Above operation range is only valid in case direct expansion indoor units are connected to the VRV IV system. Special operation ranges are valid in case of using Hydrobox units or AHU. They can be found in the installation/operation manual of the dedicated unit. Latest information can be found in the technical engineering data.

  • Page 27: About Cooling, Heating, Fan Only, And Automatic Operation

    1 Press the operation mode selector button on the user interface several times and select the operation mode of your choice. Cooling operation Heating operation RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 28: To Operate The System (With Cool/Heat Changeover Remote Control Switch)

    Do not turn off power immediately after the unit stops, but wait for at least 5 minutes. To adjust For programming temperature, fan speed and air flow direction refer to the operation manual of the user interface. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 29: Using The Dry Program

    (program dry operation). 3 Press the ON/OFF button of the user interface. Result: The operation lamp lights up and the system starts operating. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 30: Adjusting The Air Flow Direction

    Never touch the air outlet or the horizontal blades while the swing flap is in operation. Fingers may become caught or the unit may break down. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 31: Setting The Master User Interface

    8.5.2 To designate the master user interface (VRV DX and Hydrobox) In case only VRV DX indoor units (and Hydrobox units) are connected to the VRV IV system: RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A –...

  • Page 32: About Control Systems

    The unit is individually operated. NOTICE Contact your dealer in case of changing the combination or setting of group control and 2 user interface control systems. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 33: Energy Saving And Optimum Operation

    The refrigerant temperature is fixed independent from the situation. It corresponds to the standard operation which is known and can be expected from/ under previous VRV systems. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 34: Available Comfort Settings

    Combinations of Automatic mode together with Hydrobox applications should be considered. The effect of the energy saving function can be very small when low/high (cooling/heating) leaving water temperatures are requested. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 35: Maintenance And Service

    Make sure to install cleaned air filters back in the same position. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 36: Maintenance Before A Long Stop Period

    This product includes a warranty card that was filled in by the dealer at the time of installation. The completed card has to be checked by the customer and stored carefully. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 37: Recommended Maintenance And Inspection

    6 times/hour. ▪ Operation of the unit is assumed to be 10 hours/day and 2,500 hours/year. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 38: Shortened Maintenance And Replacement Cycles

    Damage due to taking apart or cleaning interiors of units by anyone other than our authorised dealers may not be included in the warranty. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 39: Troubleshooting

    Check if the user interface display shows (time system stops. to clean the air filter). (Refer to "10  Maintenance service"  [   35] and "Maintenance" in the indoor unit manual.) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 40: Error Codes: Overview

    For your reference, a list with malfunction codes is provided. You can, depending on the level of the malfunction code, reset the code by pushing the ON/OFF button. If not, ask your installer for advice. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 41 Current sensor malfunction Discharge temperature sensor malfunction (outdoor) Heat exchanger gas temperature sensor malfunction (outdoor) Suction temperature sensor malfunction (outdoor) De-icing temperature sensor malfunction (outdoor) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 42 Connection malfunction over indoor units or type mismatch Centralised address duplication Malfunction in communication centralised control device - indoor unit Auto address malfunction (inconsistency) Auto address malfunction (inconsistency) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 43: Symptoms That Are Not System Malfunctions

    The fan direction does not correspond with the user interface display. The fan direction does not swing. This is because the unit is being controlled by the micro computer. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 44: Symptom: White Mist Comes Out Of A Unit (Indoor Unit)

    11.2.11 Symptom: Noise of air conditioners (Outdoor unit) When the tone of operating noise changes. This noise is caused by the change of frequency. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 45: Symptom: Dust Comes Out Of The Unit

    Several different indoor units are being run on the same system. When another unit is running, some refrigerant will still flow through the unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 46: Relocation

    Relocation 12 Relocation Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 47: Disposal

    MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 48: Technical Data

    Result: When the selection is done, the LOT 21 datasheet can be viewed as a PDF or a HTML webpage. INFORMATION Other documents (e.g. manuals, ...) can also be consulted from the resulting webpage. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 49: For The Installer

    For the installer RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 50: About The Box

    15.6 To remove the transportation stay ............................15.1 About LOOP BY DAIKIN is part of Daikin's wider commitment to reduce our environmental footprint. With we want to create a circular economy for refrigerants. One of the actions to achieve this, is the reuse of reclaimed refrigerant in VRV units produced and sold in Europe.

  • Page 51: To Unpack The Outdoor Unit

    Possible risk: suffocation. 15.4 To remove the accessories from the outdoor unit Make sure that all accessories are available in the unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 52: Accessory Pipes: Diameters

    1 Remove the 2 transportation stay mounting bolts. 2 Remove the transportation stay as shown in the figure below. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 53 About the box RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 54: About The Units And Options

    Outdoor air cooled Y=Heat pump (continuous heating) X=Heat pump (no continuous heating) Y=Pair module only M=Multi module only Low ambient Refrigerant R410A Capacity class RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 55: About The Outdoor Unit

    European market Minor model change indication (a) For RXYLQ, there is no restriction on use as multi module. 16.3 About the outdoor unit This installation manual concerns the VRV IV, full inverter driven, heat pump system. Model line up: Model...

  • Page 56: Combining Units And Options

    16.5.2 Possible combinations of indoor units In general following type of indoor units can be connected to a VRV IV heat pump system. The list is non-exhaustive and is depending on both outdoor unit model and indoor unit model combinations.

  • Page 57: Possible Options For The Outdoor Unit

    Model name BHFQ22P1007 BHFQ22P1517 Cool/heat selector In order to control the cooling or heating operation from a central location, the following option can be connected: RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 58 To enable the power saving consumption control by digital inputs you must install the demand PCB. For installation instructions, see the installation manual of the demand PCB and addendum book for optional equipment. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 59: Unit Installation

    It is therefore recommended to install the equipment and electric wires in such a way that they keep a proper distance from stereo equipment, personal computers, etc. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 60 Install the outdoor unit away from direct sea winds. Example: Behind the building. If the outdoor unit is exposed to direct sea winds, install a windbreaker. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 61: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates

    For instructions on how to install the snow cover, contact your dealer. NOTICE When installing the snow cover, do NOT obstruct the air flow of the unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 62: Securing Safety Against Refrigerant Leaks

    1 m³ volume of the occupied space). Compliance to the local applicable regulations and standards for the maximum allowable concentration level is required. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 63 (D), (E) as a single room or as the smallest room. When there are no smaller room divisions: RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 64: Opening The Unit

    Do NOT leave the unit unattended when the service cover is removed. 17.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 65: To Open The Electrical Component Box Of The Outdoor Unit

    Electrical component box cover b Front side c Power supply terminal block d Sealing material e Moisture and dirt could enter NOT allowed Allowed RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 66: Mounting The Outdoor Unit

    Fasten the unit in place using four foundation bolts M12. It is best to screw in the foundation bolts until their length remains 20 mm above the foundation surface. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 67 ▪ When installed in a corrosive environment, use a nut with plastic washer (a) to protect the nut tightening part from rust. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 68: Piping Installation

    R410A can contribute to the greenhouse effect if it is released. Therefore pay special attention to check the tightness of the installation. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 69: Refrigerant Piping Insulation

    A, B, C: Piping between outdoor unit and (first) refrigerant branch kit Choose from the following table in accordance with the outdoor unit total capacity type, connected downstream. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 70 More specifications can be found in the technical engineering data book. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 71 Pipe size for direct connection on branch selector box (BP*) must be based on the total capacity of the connected indoor units (only in case RA  DX indoor units are connected). RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 72: To Select Refrigerant Branch Kits

    Indoor unit capacity index 2 pipes <200 KHRQ22M29H 200≤x<290 290≤x<640 KHRQ22M64H RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 73: About The Piping Length

    Assume equivalent piping length of refnet joint=0.5 m and refnet header=1 m (for calculation purposes of equivalent piping length, not for refrigerant charge calculations). RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 74: Piping Length: Vrv Dx Only

    Single outdoor Branch with refnet header Example 2.1 Multi outdoor Branch with refnet joint Example 2.2 Multi outdoor Branch with refnet joint and refnet header RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 75 Between outdoor branch and outdoor unit (only in case of a multi outdoor installation) Actual piping length 10 m Example 3 ▪ r, s, t≤10 m; u≤5 m Equivalent length 13 m RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 76 3 Indoor units (1~8) Conditions: The piping length between all indoor units to the nearest branch kit is ≤40 m. Example: h, i, j … p≤40 m RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 77: Piping Length: Vrv Dx And Hydrobox

    Branch with refnet joint Example 2 Branch with refnet joint and refnet header Example 3 Branch with refnet header 1~7 VRV DX indoor units 8 Hydrobox unit (HXY080/125) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 78: Piping Length: Vrv Dx And Ra Dx

    18.1.8 Piping length: VRV DX and RA DX For system containing VRV DX indoor units and RA DX indoor units: System setup Header BP box 1~5 RA DX indoor units RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 79: Multiple Outdoor Units: Possible Layouts

    ▪ The piping between the outdoor units must be routed level or slightly upward to avoid the risk of oil retention into the piping. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 80 If the piping length between the outdoor units exceeds 2  m, create a rise of 200 mm or more in the gas line within a length of 2 m from the kit. Then ≤2 m ≤2 m RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 81: Connecting The Refrigerant Piping

    Removing the pinched pipes 18.2.2 Precautions when connecting the refrigerant piping NOTICE Make sure the field piping and connections are NOT subjected to stress. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 82: Multiple Outdoor Units: Knockout Holes

    Installation of refrigerant piping is possible as front connection or side connection (when taken out from the bottom) as shown in the figure below. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 83: To Connect The Refrigerant Piping To The Outdoor Unit

    All local inter unit piping are field supplied except the accessory pipes. NOTICE Precautions when connecting field piping. Add brazing material as shown in the figure. ≤Ø25.4 >Ø25.4 RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 84: To Connect The Multi Connection Piping Kit

    ▪ Mount the refnet joint so that it branches either horizontally or vertically. ▪ Mount the refnet header so that it branches horizontally. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 85: To Protect Against Contamination

    Hold the pipe end downwards when removing burrs. ▪ Cover the pipe end when inserting it through a wall, to prevent dust and/or particles entering the pipe. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 86: To Braze The Pipe End

    The gas and liquid stop valves are factory closed. ▪ The figures below show the name of each part required in handling the stop valve. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 87 Inadequate torque may cause leakage of refrigerant and breakage of the stop valve cap. NOTICE Pay attention that mentioned torque range is applicable for opening Ø19.1~Ø25.4 mm stop valves only. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 88 Hexagonal Cap (valve lid) Service port wrench Ø9.5 5.4~6.6 4 mm 13.5~16.5 11.5~13.9 Ø12.7 8.1~9.9 18.0~22.0 Ø15.9 13.5~16.5 6 mm 23.0~27.0 Ø19.1 27.0~33.0 8 mm 22.5~27.5 Ø25.4 RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 89: To Remove The Spun Pipes

    5 Cut off the lower part of the gas, liquid and equalising stop valve pipes along the black line. Use an appropriate tool (e.g. a pipe cutter). RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 90: Checking The Refrigerant Piping

      116]). This setting will open field expansion valves to guarantee a refrigerant piping pathway and make it possible to perform the leak test and the vacuum drying. DANGER: RISK OF ELECTROCUTION RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 91: Checking Refrigerant Piping: General Guidelines

    Make sure the pump oil does not flow oppositely into the system while the pump is not working. NOTICE Do NOT purge the air with refrigerants. Use a vacuum pump to evacuate the installation. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 92: Checking Refrigerant Piping: Setup

    3 Break the vacuum by pressurising with nitrogen gas to a minimum gauge pressure of 0.2  MPa (2  bar). Never set the gauge pressure higher than the maximum operation pressure of the unit, i.e. 4.0 MPa (40 bar). RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 93: To Perform Vacuum Drying

    Use heat resistant polyethylene foam which can withstand a temperature of 70°C for liquid piping and polyethylene foam which can withstand a temperature of 120°C for gas piping. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 94: Charging Refrigerant

    If operation is performed within 12 minutes after the indoor and outdoor units are powered on, the compressor will not operate before the communication is established in a correct way between outdoor unit(s) and indoor units. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 95: About Charging Refrigerant

    A, B Parameters A and B (see tables below) ▪ Parameter A: In case of a multi-outdoor-unit system, add the sum of the individual outdoor unit charge factors. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 96 — — 90~110% Total CR = Total indoor unit capacity connection ratio CR per type = Allowable capacity connection ratio per indoor unit type RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 97: To Charge Refrigerant: Flow Chart

    • Charging is finished • Fill in the amount on the additional refrigerant charge label • Go to test run Continued on next page >> RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 98: To Charge Refrigerant

    (open valve B). Make sure that valve A and all outdoor unit stop valves are closed. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 99 30°C DB or with ±6 kg at an outdoor temperature of 0°C DB. If you need to speed up in case of a multiple outdoor system, connect the refrigerant tanks to each outdoor unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 100: Step 6: To Manually Charge Refrigerant

    NOTICE Make sure to open all stop valves after (pre-) charging the refrigerant. Operating with the stop valves closed will damage the compressor. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 101: To Fix The Fluorinated Greenhouse Gases Label

    Use the GWP value mentioned on the refrigerant charge label. 2 Fix the label on the inside of the outdoor unit near the gas and liquid stop valves. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 102: Electrical Installation

    ▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 103 ▪ Replace 2 of the 3 phases (L1, L2, and L3) during reverse-phase protection abnormality. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 104: Field Wiring: Overview

    Firmly close the lid and arrange the electrical wires so as to prevent the lid or other parts from coming loose. The transmission wiring outside the unit should be wrapped and routed together with the field piping. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 105: Guidelines When Knocking Out Knockout Holes

    RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 106: About Electrical Compliance

    Selection and sizing of the wiring should be done in accordance with the applicable legislation based on the information mentioned in the table below. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 107 Accordingly, the minimum circuit ampacity of the RXYLQ18=16.1 A +22.0 A=38.1 A Multiply the above result by 1.1: (38.1 A×1.1)= 41,91 A, so the recommended fuse capacity would be 45 A. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 108: To Route And Fix The Transmission Wiring

    The wiring from the indoor units must be connected to the F1/F2 (In‑Out) terminals on the PCB in the outdoor unit. Tightening torque for the transmission wiring terminal screws: RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 109: To Finish The Transmission Wiring

    After installing the transmission wires inside the unit, wrap them along with the on- site refrigerant pipes using finishing tape, as shown in figure below. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 110: To Route And Fix The Power Supply

    19.6 To connect the power supply NOTICE Never connect the power supply to transmission wiring terminal block. Otherwise the entire system may break down. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 111 In that case, the ring washer that is installed by default should be removed. Attach both cables to the power supply terminal as indicated below: RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 112: To Check The Insulation Resistance Of The Compressor

    2 Turn ON the power and leave it on for 6 hours. Result: The compressor will heat up and evaporate any refrigerant in the compressor. 3 Measure the insulation resistance again. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 113: Configuration

    20.2 Making field settings 20.2.1 About making field settings To continue the configuration of the VRV IV heat pump system, it is required to give some input to the PCB of the unit. This chapter will describe how manual input is possible by operating the push buttons/DIP switches on the PCB and reading the feedback from the 7‑segment displays.
  • Page 114  115] PC configurator For VRV IV heat pump system it is alternatively possible to make several commissioning field settings through a personal computer interface (for this, option EKPCCAB* is required). The installer can prepare the configuration (off-site) on PC and afterwards upload the configuration to the system.

  • Page 115: Field Setting Components

    Make sure that all outside panels, except for the service cover on the electrical component box, are closed while working. Close the lid of the electrical component box firmly before turning on the power. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 116: To Access Mode 1 Or 2

    If you get confused in the middle of the process, push BS1 to return to the default situation (no indication on 7‑segment displays: blank, refer to "To access mode 1 or 2" [  116]. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 117: To Use Mode 1

    It is done by pushing BS2. Accessing the selected setting's value is done by pushing BS3 1 time. To quit and return to the initial Press BS1. status RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 118: Mode 1: Monitoring Settings

    The master unit should be used to input field settings in mode 2. [1‑0] Description No indication Undefined situation. Outdoor unit is master unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 119 For more information and advice about the impact of these settings, see "20.3 Energy saving and optimum operation" [  126]. [1‑10] Shows the total number of connected indoor units. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 120: Mode 2: Field Settings

    More details on how to use the Cool/Heat selector option can be found in the manual of the Cool/Heat selector. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 121 For more information and advice about the impact of these settings, see "20.3 Energy saving and optimum operation" [  126]. [2‑9] target temperature during heating operation. [2‑9] target (°C) 0 (default) Auto RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 122 [2‑21] Description 0 (default) Deactivated. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 123 Start time automatic low noise operation (approximately) 20h00 2 (default) 22h00 24h00 [2‑27] Low noise operation stop time. This setting is used in conjunction with setting [2‑22]. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 124 The level is according to the table. [2‑32] Restriction reference 0 (default) Function not active. Follows [2‑30] setting. Follows [2‑31] setting. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 125 Heating comfort setting 1 (default) Mild Quick Powerful For more information and advice about the impact of these settings, see "20.3 Energy saving and optimum operation" [  126]. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 126: To Connect The Pc Configurator To The Outdoor Unit

    Hydrobox units. The requested leaving water temperature from the Hydrobox has priority over this energy saving control, as it is related to the required water temperature. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 127: Available Main Operation Methods

    Heating operation [2‑9] to the appropriate value, matching the requirements of the pre-designed system containing a high sensible solution. [2‑8] target (°C) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 128: Available Comfort Settings

    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. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 129 Cooling operation [2‑81]=0. This setting is used in conjunction with setting [2‑8]. Heating operation [2‑82]=0. This setting is used in conjunction with setting [2‑9]. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 130: Example: Automatic Mode During Cooling

    Evaporating temperature Quick Powerful Mild Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 131: Example: Automatic Mode During Heating

    F Outside air temperature Condensing temperature Quick Powerful Mild Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 132 Configuration E Quick F Powerful RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 133: Commissioning

    21 Commissioning NOTICE General commissioning checklist. Next to the commissioning instructions in this chapter, a general commissioning checklist is also available on the Daikin Business Portal (authentication required). The general commissioning checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during the commissioning and hand-over to the user.

  • Page 134: Checklist Before Commissioning

    "Safety device requirements"  [   106]. Be sure that neither a fuse nor a protection device has been bypassed. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 135: About The Test Run

    Refer to the indoor unit installation manual for more details (e.g., Hydrobox) concerning the individual test run. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 136: To Perform A Test Run

    In case: ▪ Setting [2-4]=1 or 2 ▪ AND room temperature <25°C: Step Description Control before start up (pressure equalisation) Heating start up control RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 137: Correcting After Abnormal Completion Of The Test Run

    For operating the indoor unit, the user interface of the indoor unit should be switched ON. Refer to the indoor unit operation manual for more details. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 138: Hand-Over To The User

    Explain the user how to properly operate the system and what to do in case of problems. ▪ Show the user what to do for the maintenance of the unit. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 139: Maintenance And Service

    50  V  DC, discharge the capacitors in a safe manner by using a dedicated capacitor discharge pen to avoid possibility of sparking. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 140: About Service Mode Operation

    3 Press BS3 to stop vacuuming mode. 23.2.2 To recover refrigerant This should be done with a refrigerant recovery unit. Follow the same procedure as for vacuuming method. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 141 Use a separate recovery system so that the unit's compressor does NOT have to operate. NOTICE Make sure to NOT recover any oil while recovering refrigerant. Example: By using an oil separator. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 142: Troubleshooting

    Stop valve closed (liquid) Open liquid stop valve. ▪ Refrigerant overcharge ▪ Check refrigerant amount +recharge unit. ▪ Stop valve closed ▪ Open stop valves. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 143 +recharge unit. ▪ Stop valve closed ▪ Open stop valves. Ambient temperature sensor Check connection on PCB or malfunction (R1T) - A1P actuator. (X18A) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 144 (S1NPH): open actuator. circuit - A1P (X32A) High pressure sensor Check connection on PCB or malfunction (S1NPH): short actuator. circuit - A1P (X32A) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 145 (system operation possible) functionality. Malfunction code: System test Execute system test run. run not yet executed (system operation not possible) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 146 (by monitor mode) or wait till initialisation is finished. Stop valve closed or wrong Open stop valves. (during system test run) Auto charging related RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 147 Refer to requirements to be is not compatible with leak able to execute leak detection detection functionality is operation. installed (e.g., RA DX indoor unit, Hydrobox, …) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 148: Disposal

    MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 149: Technical Data

    Technical data 26 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). In this chapter 26.1...
  • Page 150 The service space dimensions in above figure are based on cooling operation at 35°C ambient temperature (standard conditions). INFORMATION Further specifications can be found in the technical engineering data. RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 151: Piping Diagram: Outdoor Unit

    Notes to go through before starting the unit English Translation Notes to go through before starting the Notes to go through before starting the unit unit Symbols Symbols RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 152 F401U (A2P) Fuse (T, 6.3 A, 250 V) F402U (A2P) Fuse (T, 6.3 A, 250 V) F403U (A2P) Fuse (T, 6.3 A, 250 V) F410U (A2P) Fuse (T, 63 A, 600 V) RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...
  • Page 153 PCB connector Terminal strip X*M (A*P) Terminal strip on PCB Connector Electronic expansion valve Solenoid valve Noise filter (ferrite core) Noise filter Optional Field supply RXMLQ8 + RXYLQ10~14T7Y1B* Installer and user reference guide VRV IV system air conditioner 4P543427-1A – 2020.10...

  • Page 154: Glossary

    Optional equipment Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation. Field supply Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.
  • Page 156 4P543427-1A 2020.10 Verantwortung für Energie und Umwelt...

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