Daikin 2MXM40M4V1B Installer's Reference Manual
R32 split series
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Summary of Contents for Daikin 2MXM40M4V1B
- Page 1 Installer reference guide R32 Split series 2MXM40M4V1B 2MXM50M3V1B9 2AMXM40M4V1B 2AMXM50M4V1B 2AMXF40A2V1B 2AMXF50A2V1B 2MXF40A2V1B 2MXF50A2V1B 2MXM40N2V1B 2MXM50N2V1B...
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Page 2: Table Of Contents
Table of contents Table of contents 1 About the documentation About this document ..............................2 General safety precautions About the documentation .............................. 2.1.1 Meaning of warnings and symbols ........................ For the installer ................................2.2.1 General ................................2.2.2 Installation site ............................... 2.2.3 Refrigerant —... - Page 3 Table of contents To determine the complete recharge amount ......................48 To charge additional refrigerant............................. 48 To fix the fluorinated greenhouse gases label ....................... 49 9 Electrical installation About connecting the electrical wiring .......................... 50 9.1.1 Precautions when connecting the electrical wiring..................50 9.1.2 Guidelines when connecting the electrical wiring..................
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Page 4: 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 5: General Safety Precautions
General safety precautions 2 General safety precautions 2.1 About the documentation ▪ The original documentation is written in English. All other languages are translations. ▪ The precautions described in this document cover very important topics, follow them carefully. ▪ The installation of the system, and all activities described in the installation manual and in the installer reference guide MUST be performed by an authorised installer. -
Page 6: For The Installer
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 7: Installation Site
General safety precautions 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. CAUTION ▪... - Page 8 WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed only by authorised persons. WARNING If one or more rooms are connected to the unit using a duct system, make sure: ▪...
- Page 9 General safety precautions NOTICE ▪ Do NOT re-use joints which have been used already. ▪ Joints made in installation between parts of refrigerant system shall be accessible for maintenance purposes. Installation space requirements 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 (m ).
- Page 10 General safety precautions m (kg) 1.843 7.956 Ceiling-mounted Wall-mounted Floor-standing unit unit unit m (kg) m (kg) m (kg) ≤1.842 — ≤1.842 — ≤1.842 — 1.843 3.64 1.843 4.45 1.843 28.9 4.83 34.0 3.95 4.34 5.31 41.2 5.79 49.0 4.74 5.13 6.39 57.5...
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Page 11: Refrigerant - In Case Of R410A Or R32
General safety precautions (b) Wall-mounted unit (= Wall-mounted unit) (c) Floor-standing unit (= Floor-standing unit) 2.2.3 Refrigerant — in case of R410A or R32 If applicable. See the installation manual or installer reference guide of your application for more information. NOTICE Make sure refrigerant piping installation complies with applicable legislation. -
Page 12: Brine
General safety precautions WARNING Make sure there is no oxygen in the system. Refrigerant may only be charged after performing the leak test and the vacuum drying. Possible consequence: Self-combustion and explosion of the compressor because of oxygen going into the operating compressor. ▪... -
Page 13: Water
General safety precautions WARNING The ambient temperature inside the unit can get much higher than that of the room, e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous situation. WARNING The use and installation of the application MUST comply with the safety and environmental precautions specified in the applicable legislation. - Page 14 General safety precautions 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.
- Page 15 General safety precautions WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit. NOTICE Only applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method.
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Page 16: Specific Installer Safety Instructions
Specific installer safety instructions 3 Specific installer safety instructions Always observe the following safety instructions and regulations. Unit installation (see "6 Unit installation" [ 26]) WARNING Installation shall be done by an installer, the choice of materials and installation shall comply with the applicable legislation. In Europe, EN378 is the applicable standard. "6.1 Preparing the installation site" [ 26]) - Page 17 Specific installer safety instructions WARNING ▪ Only use R32 as refrigerant. Other substances may cause explosions and accidents. ▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere. ▪...
- Page 18 Specific installer safety instructions WARNING ▪ Only use R32 as refrigerant. Other substances may cause explosions and accidents. ▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere. ▪...
- Page 19 Specific installer safety instructions WARNING ▪ Do NOT use locally purchased electrical parts inside the product. ▪ Do NOT branch the power supply for the drain pump, etc. from the terminal block. This could result in electrical shock or fire. WARNING Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot.
- Page 20 Specific installer safety instructions 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 unit. ▪ Do NOT touch live parts for 10 minutes after the power supply is turned off because of high voltage risk.
- Page 21 Specific installer safety instructions DANGER: RISK OF ELECTROCUTION ▪ When the unit is not operating, the LEDs on the PCB are turned off in order to save power. ▪ Even when the LEDs are off, the terminal block and the PCB may be powered. 2(A)MXM40+50 + 2(A)MXF40+50 Installer reference guide R32 Split series...
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Page 22: About The Box
About the box 4 About the box 4.1 Overview: About the box This chapter describes what you have to do after the boxes with the outdoor and indoor unit are delivered on-site. Keep the following in mind: ▪ At delivery, the unit MUST be checked for damage. Any damage MUST be reported immediately to the claims agent of the carrier. -
Page 23: To Remove The Accessories From The Outdoor Unit
About the box 4.2.2 To remove the accessories from the outdoor unit 1 Lift the outdoor unit. CAUTION Only handle the outdoor unit as follows: 2 Remove the accessories at the bottom of the package. 1× 1× 1× 1× 1× 1×... - Page 24 About the box g Reducer assembly h Energy label 2(A)MXM40+50 + 2(A)MXF40+50 Installer reference guide R32 Split series 4P600463-2C – 2020.08...
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Page 25: About The Unit
The refrigerant inside this unit is mildly flammable. INFORMATION For the operation limits see the latest technical data of the outdoor unit on the regional Daikin website (publicly accessible). 5.1 Overview: About the unit This chapter contains information about: ▪... -
Page 26: Unit Installation
Unit installation 6 Unit installation WARNING Installation shall be done by an installer, the choice of materials and installation shall comply with the applicable legislation. In Europe, EN378 is the applicable standard. In this chapter Preparing the installation site ..............................6.1.1 Installation site requirements of the outdoor unit .................... -
Page 27: Installation Site Requirements Of The Outdoor Unit
Unit installation WARNING The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). 6.1.1 Installation site requirements of the outdoor unit INFORMATION Also read the following requirements: ▪... - Page 28 Unit installation 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; ▪ disruption of operation due to decrease of low pressure or increase of high pressure;...
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Page 29: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates
Unit installation If the outdoor unit is exposed to direct sea winds, install a windbreaker. ▪ Height of windbreaker≥1.5×height of outdoor unit ▪ Mind the service space requirements when installing the windbreaker. Sea wind Building Outdoor unit Windbreaker The outdoor unit is designed for outdoor installation only, and for ambient temperatures within the following ranges: Cooling mode Heating mode... -
Page 30: Opening The Unit
Unit installation It is recommended to provide at least 150 mm of free space below the unit (300 mm for heavy snowfall areas). Additionally, make sure the unit is positioned at least 100 mm above the maximum expected level of snow. If necessary, construct a pedestal. -
Page 31: Precautions When Mounting The Outdoor Unit
Unit installation Typical workflow Mounting the outdoor unit typically consists of the following stages: Providing the installation structure. Installing the outdoor unit. Providing drainage. Protecting the unit against snow and wind by installing a snow cover and baffle plates. See "6.1 Preparing the installation site" [ 26]. -
Page 32: To Install The Outdoor Unit
Unit installation 6.3.4 To install the outdoor unit 6.3.5 To provide drainage ▪ Make sure that condensation water can be evacuated properly. ▪ Install the unit on a base to make sure that there is proper drainage in order to avoid ice accumulation. -
Page 33: To Prevent The Outdoor Unit From Falling Over
Unit installation Drain port Bottom frame Drain plug Hose (field supply) 6.3.6 To prevent the outdoor unit from falling over In case the unit is installed in places where strong wind can tilt the unit, take following measure: 1 Prepare 2 cables as indicated in the following illustration (field supply). 2 Place the 2 cables over the outdoor unit. -
Page 34: Piping Installation
Piping installation 7 Piping installation In this chapter Preparing refrigerant piping ..............................7.1.1 Refrigerant piping requirements ........................... 7.1.2 Refrigerant piping insulation..........................7.1.3 Refrigerant piping length and height difference ....................Connecting the refrigerant piping............................7.2.1 About connecting the refrigerant piping....................... 7.2.2 Precautions when connecting the refrigerant piping.................... -
Page 35: Refrigerant Piping Insulation
Piping installation 7.1.2 Refrigerant piping insulation ▪ Use polyethylene foam as insulation material: with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and 0.045 kcal/mh°C) with a heat resistance of at least 120°C ▪ Insulation thickness Pipe outer diameter (Ø ) Insulation inner diameter Insulation thickness (t) (Ø... -
Page 36: Connecting The Refrigerant Piping
Piping installation 7.2 Connecting the refrigerant piping CAUTION ▪ No brazing or welding on site for units with R32 refrigerant charge during shipment. ▪ During installation of the refrigeration system, joining of parts with at least one part charged shall be performed taking into account the following requirements: ð... - Page 37 Piping installation DANGER: RISK OF BURNING/SCALDING CAUTION ▪ Do NOT use mineral oil on flared part. ▪ Do NOT reuse piping from previous installations. ▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material may dissolve and damage the system.
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Page 38: Guidelines When Connecting The Refrigerant Piping
Piping installation 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. -
Page 39: Connections Between Outdoor And Indoor Unit Using Reducers
Piping installation 1 Cut the pipe end with a pipe cutter. 2 Remove burrs with the cut surface facing down so that the chips do NOT enter the pipe. Cut exactly at right angles. Remove burrs. 3 Remove the flare nut from the stop valve and put the flare nut on the pipe. 4 Flare the pipe. -
Page 40: Using The Stop Valve And Service Port
Piping installation Port Class Reducer 2MXM50, 2AMXM50 15, 20, 25, 35, 42 — 15, 20, 25, 35 42, 50 — 2AMXF50 25, 35 — 25, 35 2MXF50 20, 25, 35 — 20, 25, 35 Use optional accessory. Reducer type Connection Ø12.7 mm →... - Page 41 Piping installation ▪ The following figure shows the stop valve parts required when handling the valve. Service port and service port cap Valve stem Field piping connection Stem cap ▪ Keep both stop valves open during operation. ▪ Do NOT apply excessive force to the valve stem. Doing so may break the valve body.
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Page 42: To Connect The Refrigerant Piping To The Outdoor Unit
Piping installation ▪ After handling the stop valve, tighten the stem cap, and check for refrigerant leaks. Stem cap Piping Ø (mm) Tightening torque (N∙m) Liquid side 22~28 Gas side 33~39 12.7 49~59 To handle the service cap ▪ ALWAYS use a charge hose equipped with a valve depressor pin, since the service port is a Schrader type valve. -
Page 43: Precautions When Checking The Refrigerant Piping
Piping installation Before checking the refrigerant piping Make sure the refrigerant piping is connected between the outdoor unit and the indoor unit. Typical workflow Checking the refrigerant piping typically consists of the following stages: Checking for leaks in the refrigerant piping. Performing vacuum drying to remove all moisture, air or nitrogen from the refrigerant piping. -
Page 44: To Perform Vacuum Drying
Piping installation 2 Check for leaks by applying the bubble test solution to all connections. 3 Discharge all nitrogen gas. 7.3.4 To perform vacuum drying Connect the vacuum pump and manifold as follows: Low pressure gauge Gauge manifold High pressure gauge Low-pressure valve (Lo) High-pressure valve (Hi) Charging hoses... - Page 45 Piping installation INFORMATION After opening the stop valve, it is possible that the pressure in the refrigerant piping does NOT increase. This might be caused by e.g. the closed state of the expansion valve in the outdoor unit circuit, but does NOT present any problem for correct operation of the unit.
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Page 46: Charging Refrigerant
Charging refrigerant 8 Charging refrigerant In this chapter About charging refrigerant..............................About the refrigerant ................................Precautions when charging refrigerant ..........................To determine the additional refrigerant amount ........................To determine the complete recharge amount ........................To charge additional refrigerant ............................To fix the fluorinated greenhouse gases label ........................8.1 About charging refrigerant The outdoor unit is factory charged with refrigerant, but in some cases the following might be necessary:... -
Page 47: About The Refrigerant
Charging refrigerant 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 fixing it to the inside of the outdoor unit. 8.2 About the refrigerant This product contains fluorinated greenhouse gases. -
Page 48: Precautions When Charging Refrigerant
Charging refrigerant WARNING NEVER directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite. 8.3 Precautions when charging refrigerant INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [ 5] ▪... -
Page 49: To Fix The Fluorinated Greenhouse Gases Label
Charging refrigerant Prerequisite: Before charging refrigerant, make sure the refrigerant piping is connected and checked (leak test and vacuum drying). 1 Connect the refrigerant cylinder to the service port. 2 Charge the additional refrigerant amount. 3 Open the gas stop valve. 8.7 To fix the fluorinated greenhouse gases label 1 Fill in the label as follows: Contains fluorinated greenhouse gases... -
Page 50: Electrical Installation
Electrical installation 9 Electrical installation In this chapter About connecting the electrical wiring ..........................9.1.1 Precautions when connecting the electrical wiring ....................9.1.2 Guidelines when connecting the electrical wiring ....................9.1.3 Specifications of standard wiring components ..................... To connect the electrical wiring to the outdoor unit ......................9.1 About connecting the electrical wiring Before connecting the electrical wiring Make sure:... - Page 51 Electrical installation WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock. ▪...
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Page 52: Guidelines When Connecting The Electrical Wiring
Electrical installation DB1 diode bridge S90 thermistor lead wire LED A S40 thermal overload relay lead wire S20 (white) room A electronic expansion valve coil S21 (red) room B electronic expansion valve coil S80 (white) 4-way valve lead wire connector S70 fan motor lead wire S99 heating lock S91 (red) liquid thermistor lead wire... -
Page 53: Specifications Of Standard Wiring Components
Electrical installation Wire type Installation method Stranded conductor wire with round crimp-style terminal a Terminal b Screw c Flat washer O Allowed X NOT allowed Tightening torques Item Tightening torque (N•m) M4 (X1M) M4 (earth) ▪ The earth wire between the wire retainer and the terminal must be longer than the other wires. - Page 54 Electrical installation 2× 2 Strip insulation (20 mm) from the wires. Strip wire end to this point An excessive strip length may cause electrical shock or leakage 3 Connect the wires between the indoor and outdoor units so that the terminal numbers match.
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Page 55: Finishing The Outdoor Unit Installation
Finishing the outdoor unit installation 10 Finishing the outdoor unit installation 10.1 To finish the outdoor unit installation DANGER: RISK OF ELECTROCUTION ▪ Make sure that the system is earthed properly. ▪ Turn off the power supply before servicing. ▪ Install the switch box cover before turning on the power supply. -
Page 56: Configuration
Configuration 11 Configuration In this chapter 11.1 About ECONO mode prohibition setting..........................11.1.1 To turn on ECONO mode prohibition setting ......................11.2 About night quiet mode ................................. 11.2.1 To turn on the night quiet mode ........................... 11.3 About heat mode lock ................................11.3.1 To turn on heat mode lock............................. -
Page 57: About Night Quiet Mode
Configuration 4 Reinstall the electric box cover and the top plate in reverse order and turn on the main power supply. 11.2 About night quiet mode The night quiet mode function makes the outdoor unit run more quietly at nighttime. This will reduce the cooling capacity of the unit. Explain Night quiet mode to the customer and confirm if customer wants to use this mode. -
Page 58: About Standby Electricity Saving Function
Configuration c S99 connector Mode S99 connector Heat pump (cooling, heating) Connected Heating only Disconnected 4 Reinstall the top plate and the front plate. INFORMATION Forced operation is also available in heating mode. 11.4 About standby electricity saving function The standby electricity saving function: ▪... -
Page 59: Commissioning
Commissioning 12 Commissioning In this chapter 12.1 Overview: Commissioning ..............................12.2 Precautions when commissioning............................12.3 Checklist before commissioning............................. 12.4 Checklist during commissioning ............................. 12.5 Trial operation and testing ..............................12.5.1 To perform a test run............................. 12.6 Starting up the outdoor unit ..............................12.1 Overview: Commissioning This chapter describes what you have to do and know to commission the system after it is installed. -
Page 60: Checklist During Commissioning
Commissioning There are NO loose connections or damaged electrical components in the switch box. There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units. There are NO refrigerant leaks. The refrigerant pipes (gas and liquid) are thermally insulated. The correct pipe size is installed and the pipes are properly insulated. -
Page 61: Starting Up The Outdoor Unit
Commissioning 2 Measure the temperature at the indoor unit inlet and outlet after running the unit for about 20 minutes. The difference should be more than 8°C (cooling) or 15°C (heating). 3 First check operation of each unit individually, then check simultaneous operation of all indoor units. -
Page 62: Hand-Over To The User
Hand-over to the user 13 Hand-over to the user Once the test run is finished and the unit operates properly, please make sure the following is clear for the user: ▪ Make sure that the user has the printed documentation and ask him/her to keep it for future reference. -
Page 63: Maintenance And Service
Maintenance and service 14 Maintenance and service NOTICE Maintenance MUST be done by an authorized installer or service agent. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO equivalent. -
Page 64: About The Compressor
Maintenance and service ▪ Heat exchanger The heat exchanger of the outdoor unit can get blocked up due to dust, dirt, leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance. -
Page 65: Troubleshooting
Troubleshooting 15 Troubleshooting 15.1 Overview: Troubleshooting This chapter describes 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. -
Page 66: Symptom: The Unit Is Not Heating Or Cooling As Expected
Troubleshooting 15.3.2 Symptom: The unit is NOT heating or cooling as expected Possible causes Corrective action Wrong connection of the electrical Connect the electrical wires correctly. wires Gas leakage Check for gas leakage. Marks on the wiring and piping do NOT Marks on the wiring and piping (room A, match room B, room C, room D, room E) for... - Page 67 Troubleshooting DANGER: RISK OF ELECTROCUTION ▪ When the unit is not operating, the LEDs on the PCB are turned off in order to save power. ▪ Even when the LEDs are off, the terminal block and the PCB may be powered. 2(A)MXM40+50 + 2(A)MXF40+50 Installer reference guide R32 Split series...
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Page 68: Disposal
Disposal 16 Disposal NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. 16.1 Overview: Disposal Typical workflow Disposing of the system typically consists of the following stages:... -
Page 69: To Start And Stop Forced Cooling
Disposal Gas stop valve Closing direction Hexagonal wrench Valve cap Liquid stop valve 16.3 To start and stop forced cooling There are 2 methods to perform forced cooling. ▪ Method 1. Using the indoor unit ON/OFF switch (if present on the indoor unit). ▪... -
Page 70: Technical Data
Technical data 17 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). 17.1 Wiring diagram 17.1.1 Unified wiring diagram legend... - Page 71 Technical data Symbol Meaning AC*, CN*, E*, HA*, HE*, HL*, HN*, HR*, Connection, connector MR*_A, MR*_B, S*, U, V, W, X*A, K*R_*, NE D*, V*D Diode Diode bridge DIP switch Heater FU*, F*U, (for characteristics, refer to Fuse PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L...
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Page 72: Piping Diagram: Outdoor Unit
Technical data Symbol Meaning Thermo switch Residual current device Resistor Thermistor Receiver Limit switch Float switch S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS* Pressure switch (high) S*PL Pressure switch (low) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S... - Page 73 Technical data 2MXM50, 2AMXM50, 2AMXF50, 2MXF50 7.9CuT 6.4CuT 6.4CuT (6.4CuT) 7.9CuT 6.4CuT 6.4CuT 6.4CuT (6.4CuT) 4.8CuT 4.8CuT 9.5CuT 9.5CuT 9.5CuT (9.5CuT) 9.5CuT 9.5CuT 9.5CuT (12.7CuT) 9.5CuT 9.5CuT HPS1 9.5CuT A Room A B Room B a 4-way valve ON: heating b High pressure switch with automatic reset c Muffler d Discharge pipe thermistor...
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Page 74: 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 76 4P600463-2C 2020.08 Verantwortung für Energie und Umwelt...
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