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4 About the system

Installation and operation manual

8

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery

4P546222-1B – 2020.10

WARNING

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.

CAUTION

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.

CAUTION: Pay attention to the fan!

It is dangerous to inspect the unit while
the fan is running.

Be sure to turn off the main switch
before executing any maintenance
task.

CAUTION

After a long use, check the unit stand
and fitting for damage. If damaged, the
unit may fall and result in injury.

WARNING

NEVER replace a fuse with a fuse of a
wrong ampere ratings or other wires
when a fuse blows out. Use of wire or
copper wire may cause the unit to
break down or cause a fire.

WARNING

▪ Do NOT modify, disassemble,

remove, reinstall or repair the unit
yourself as incorrect dismantling or
installation may cause an electric
shock or fire. Contact your dealer.

▪ In case of accidental refrigerant

leaks, make sure there are no naked
flames. The refrigerant itself is
entirely safe, non-toxic and non-
combustible, but it will generate toxic
gas when it accidentally leaks into a
room where combustible air from fan
heaters, gas cookers, etc. is present.
Always have qualified service
personnel confirm that the point of
leakage has been repaired or
corrected before resuming operation.

WARNING

Stop operation and shut off the
power if anything unusual occurs
(burning smells etc.).

Leaving the unit running under such
circumstances may cause breakage,
electric shock or fire. Contact your
dealer.

WARNING

The refrigerant in the system is safe
and normally does not leak. If the
refrigerant leaks in the room, contact
with a fire of a burner, a heater or a
cooker may result in a harmful gas.

Turn off any combustible heating
devices, 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.

CAUTION

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.

4

About the system

The indoor unit part of VRV IV heat recovery system can be used for
heating/cooling  applications.  The  type  of  indoor  unit  which  can  be
used depends on the outdoor units series.

NOTICE

For future modifications or expansions of your system:

A  full  overview  of  allowable  combinations  (for  future
system  extensions)  is  available  in  technical  engineering
data  and  should  be  consulted.  Contact  your  installer  to
receive more information and professional advice.

4.1

System layout

Your  VRV  IV  heat  recovery  series  outdoor  unit  can  be  one  of
following models:

Model

Description

REYQ8~20

Heat recovery model for single or multi-use

REMQ5

Heat recovery model for multi-use only

Summary of Contents for REYQ8U7Y1B

Page 1: ...lation and operation manual VRV IV heat recovery English Installation and operation manual VRV IV heat recovery REYQ8U7Y1B REYQ10U7Y1B REYQ12U7Y1B REYQ14U7Y1B REYQ16U7Y1B REYQ18U7Y1B REYQ20U7Y1B REMQ5...

Page 2: ...p niejszymi poprawkami 18 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...

Page 3: ...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 teplota...

Page 4: ...lay shows 88 14 8 2 16 Symptom The compressor in the outdoor unit does not stop after a short heating operation 14 8 2 17 Symptom The inside of an outdoor unit is warm even when the unit has stopped 1...

Page 5: ...st read before installing Format Paper in the box of the outdoor unit Outdoor unit installation and operation manual Installation and operation instructions Format Paper in the box of the outdoor unit...

Page 6: ...e side Do NOT use taped wires stranded conductor wires extension cords or connections from a star system They can cause overheating electrical shock or fire Do NOT install a phase advancing capacitor...

Page 7: ...nsuring this product is disposed of correctly you will help to prevent potential negative consequences for the environment and human health For more information contact your installer or local authori...

Page 8: ...vice personnel confirm that the point of leakage has been repaired or corrected before resuming operation WARNING Stop operation and shut off the power if anything unusual occurs burning smells etc Le...

Page 9: ...ly is turned off during operation operation will restart automatically after the power turns back on again 6 2 2 About cooling heating fan only and automatic operation Changeover cannot be made with a...

Page 10: ...ration if the room temperature is low 20 C 6 3 2 To use the dry program WITHOUT cool heat changeover remote control switch To start 1 Press the operation mode selector button on the user interface sev...

Page 11: ...e Only the master user interface can select heating or cooling mode 7 Maintenance and service NOTICE NEVER inspect or service the unit by yourself Ask a qualified service person to perform this work W...

Page 12: ...he malfunction code If the system does NOT operate properly except for the above mentioned cases and none of the above mentioned malfunctions is evident investigate the system in accordance with the f...

Page 13: ...ation System mismatch Wrong type of indoor units combined Indoor unit malfunction Connection malfunction over indoor units or type mismatch Centralised address duplication Malfunction in communication...

Page 14: ...ise is heard In order to prevent oil and refrigerant from remaining in the system a small amount of refrigerant is kept flowing 8 2 10 Symptom Noise of air conditioners Indoor unit outdoor unit A cont...

Page 15: ...E O6 4 x 0 022 105 CR 130 50 CR 105 50 CR 70 70 CR 85 85 CR 105 105 CR 130 8HP Total indoor unit capacity connection ratio CR 10 12HP 14 16HP 18 20HP 2 0 1 5 1 5 1 2 1 5 1 1 0 7 1 0 0 5 0 5 0 3 0 5 0...

Page 16: ...on the heating capacity can go up till 168 kW and in cooling till 150 kW The outdoor unit is designed to work in heating mode at ambient temperatures from 20 C WB to 15 5 C WB and in cooling mode at a...

Page 17: ...cal component box of the outdoor unit 417 For service purposes the pushbuttons on the main PCB need to be accessed To access these pushbuttons the electrical component box cover does not need to be op...

Page 18: ...t piping 14 1 1 Refrigerant piping requirements NOTICE Refrigerant R410A requires strict cautions for keeping the system clean and dry Foreign materials including mineral oils or moisture should be pr...

Page 19: ...Piping between refrigerant branch kit and indoor unit e Indoor unit Size up HP class Liquid piping outer diameter size mm 5 8 9 5 12 7 10 12 14 12 7 15 9 16 18 22 15 9 19 1 24 26 34 19 1 22 2 36 54 T...

Page 20: ...the piping between outdoor units as shown in the 4 correct possibilities of the figure below a b b b a b b b a b a b a b a a a 200 mm a To indoor unit b Oil collects to the outmost outdoor unit when...

Page 21: ...outdoor unit 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 v...

Page 22: ...ce port cover securely For the tightening torque refer to the table below Check for refrigerant leaks after tightening the service port cover Tightening torques Stop valve size mm Tightening torque N...

Page 23: ...ait to apply setting 2 21 until the outdoor unit has finished the initialisation Leak test and vacuum drying Checking the refrigerant piping involves Checking for any leakages in the refrigerant pipin...

Page 24: ...o perform vacuum drying To remove all moisture from the system proceed as follows 1 Evacuate the system for at least 2 hours to a target vacuum of 100 7 kPa 1 007 bar 5 Torr absolute 2 Check that with...

Page 25: ...ible when Hydrobox units are connected to the system To speed up the refrigerant charging process it is in case of larger systems recommended to first pre charge a portion of refrigerant through the l...

Page 26: ...ing installation Installation and operation manual 26 REYQ8 20 REMQ5U7Y1B VRV IV heat recovery 4P546222 1B 2020 10 Inch piping Metric piping Piping Weight factor Piping Weight factor 22 2 mm 0 37 22 m...

Page 27: ...rigerant overcharge happened recover refrigerant to reach R Q Step 2 3 Close valves C D and A Open valve B to the liquid line Execute pre charging amount Q kg Disconnect the manifold from the gas line...

Page 28: ...en valve A Charge remaining amount of refrigerant P kg R Q P Depending on ambient conditions the unit will decide to perform autocharge operation in heating or cooling mode Close valve A Push BS3 to s...

Page 29: ...ditional refrigerant amount via setting 2 14 Go to test run Following codes appear e 2 indoor temperature out of range and e 3 outdoor temperature out of range Push BS1 to leave program Charging is fi...

Page 30: ...is connected to the piping inside the unit The unit s internal piping is already factory charged with refrigerant so be careful when connecting the charge hose After adding the refrigerant do not for...

Page 31: ...mperature range for leak detection operation Retry when ambient conditions are satisfied Outdoor unit is out of temperature range for leak detection operation Retry when ambient conditions are satisfi...

Page 32: ...EYQ40 14556 REYQ42 14735 REYQ44 15094 REYQ46 15634 REYQ48 16172 REYQ50 17071 REYQ52 17969 REYQ54 18868 INFORMATION Multi units are standard combinations 15 2 Safety device requirements The power suppl...

Page 33: ...smission wiring Q1 Q2 c Plastic bracket d Field supplied clamps 15 5 To connect the transmission wiring The wiring from the indoor units must be connected to the F1 F2 In Out terminals on the PCB in t...

Page 34: ...has to be removed Close the hole to avoid small animals or dirt from entering 15 8 To connect the power supply The power supply MUST be clamped to the plastic bracket using field supplied clamp mater...

Page 35: ...an be monitored as well Mode 2 field settings Mode 2 is used to change the field settings of the system Consulting the current field setting value and changing the current field setting value is possi...

Page 36: ...e process push BS1 to return to the default situation no indication on 7 segment displays blank refer to To access mode 1 or 2 436 16 1 5 To use mode 1 Mode 1 is used to set basic settings and to moni...

Page 37: ...heating comfort setting 16 1 8 Mode 2 Field settings 2 0 Cool Heat selection setting 2 0 Description 0 default Each individual outdoor unit can select Cool Heat operation by Cool Heat selector if ins...

Page 38: ...the outdoor unit exceeds 50 m the setting 2 49 has to be changed to 1 16 1 9 To connect the PC configurator to the outdoor unit X 2 7 A a b c 2 3 4 5 H J S T X27A A1P a PC b Cable EKPCCAB c Outdoor u...

Page 39: ...has been bypassed Internal wiring Visually check the electrical component box and the inside of the unit for loose connections or damaged electrical components Pipe size and pipe insulation Be sure th...

Page 40: ...operation will be possible after 5 minutes 17 5 Correcting after abnormal completion of the test run The test operation is only completed if there is no malfunction code displayed on the user interfac...

Page 41: ...PCB X21A Check connection on PCB or actuator Electronic expansion valve malfunction lower heat exchanger Y3E main PCB X23A Check connection on PCB or actuator Electronic expansion valve malfunction su...

Page 42: ...ection on PCB or actuator Upper heat exchanger gas temperature sensor R8T main PCB X29A Check connection on PCB or actuator Lower heat exchanger gas temperature sensor R9T main PCB X29A Check connecti...

Page 43: ...tem test run An error occurred during the test run Re execute the test run Test run aborted Re execute the test run Test run aborted due to communication issues Check the communication wires and re ex...

Page 44: ...de Leak detection function related Unit is not prepared to execute leak detection operation Refer to requirements to be able to execute leak detection operation Indoor unit is out of temperature range...

Page 45: ...h obstacles F Front side Suction side In case of an installation site where sides A B C D have obstacles the wall heights of sides A C have no impact on service space dimensions Refer to the figure ab...

Page 46: ...manual 46 REYQ8 20 REMQ5U7Y1B VRV IV heat recovery 4P546222 1B 2020 10 20 2 Piping diagram Outdoor unit Piping diagram 5 12 HP a b d e c a Stop valve liquid b Service port c Stop valve high pressure...

Page 47: ...on and operation manual 47 REYQ8 20 REMQ5U7Y1B VRV IV heat recovery 4P546222 1B 2020 10 Piping diagram 14 20 HP a b d e c a Stop valve liquid b Service port c Stop valve high pressure low pressure d S...

Page 48: ...es S1PH S2PH for 14 20 HP only 6 For 5 12 HP When using the optional accessory refer to the installation manual of the optional accessory 6 For 14 20 HP connector X1A M2F is red connector X2A M2F is w...

Page 49: ...or for optional accessories X10A Connector bottom plate heater Legend for wiring diagram 14 20 HP A1P Printed circuit board main A2P A5P Printed circuit board noise filter A3P A6P Printed circuit boar...

Page 50: ...inverter cooling Y6E Electronic expansion valve auto charge Y2S Solenoid valve liquid pipe Y3S Solenoid valve high pressure low pressure gas pipe Y4S Solenoid valve heat exchanger lower Y5S Solenoid v...

Page 51: ......

Page 52: ...4P546222 1B 2020 10 Copyright 2018 Daikin 4P546222 1 B 0000000Z Verantwortung f r Energie und Umwelt...

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