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Summary of Contents for Daikin LREN8A Y1B Series
- Page 1 Installation and operation manual CO₂ ZEAS outdoor unit and capacity up unit LREN8A▲Y1B▼ LREN10A▲Y1B▼ LREN12A▲Y1B▼ LRNUN5A▲Y1▼ Installation and operation manual English ▲= 1, 2, 3, …, 9 CO₂ ZEAS outdoor unit and capacity up unit ▼= , , 1, 2, 3, …, 9...
- Page 2 (mm) 1500 ≥300 ≥500 ≥500 ≥500 ≥300 ≥500 ≥500 ≥500 ≥500 ≥500 ≥300 ≥500 ≥500 ≥500 ≥300 ≥500 ≥500 ≥500 ≥500 ≥500 ≥500...
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Page 3: Table Of Contents
Table of contents 13.1.3 Refrigerant piping length and height difference ..21 Table of contents 13.1.4 To select the piping size ..........22 13.1.5 To select refrigerant branch kits........23 13.1.6 To select expansion valves for refrigeration ....23 1 About the documentation 13.2 Using stop valves and service ports .......... -
Page 4: About The Documentation
▪ A subset of the latest technical data is available on the regional DANGER: RISK OF BURNING/SCALDING Daikin website (publicly accessible). ▪ The full set of the latest technical data is available on the Daikin DANGER: RISK OF ELECTROCUTION Business Portal (authentication required). - Page 5 2 Specific installer safety instructions WARNING WARNING ▪ Install all necessary countermeasures in case of refrigerant leakage according to standard EN378 (see "12.1.3 Additional installation site requirements for CO₂ refrigerant" [ 4 17]). ▪ Install a CO leak detector (field supply) in every room NEVER remove the spun piping by brazing.
- Page 6 2 Specific installer safety instructions WARNING WARNING Install safety valves in a proper way according the ▪ If the power supply has a missing or wrong N-phase, applicable national regulation. equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a WARNING utility pipe, surge absorber, or telephone earth.
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Page 7: For The User
3 User safety instructions WARNING WARNING ▪ ONLY use R744 (CO ) as refrigerant. Other substances If any part of system is already (accidentally) powered on, may cause explosions and accidents. setting [2-21] on the outdoor unit can be set to value 1 to open the expansion valves (Y1E, Y2E, Y7E, Y8E, Y15E). -
Page 8: Instructions For Safe Operation
3 User safety instructions CAUTION (field supply). In order to be effective, the unit must ALWAYS be electrically ▪ Do NOT place any objects or powered after installation. equipment on top of the unit. If for any reason the CO refrigerant ▪... - Page 9 3 User safety instructions Maintenance and service (see "6 Maintenance and CAUTION service" [ 4 10]) Before accessing terminal devices, DANGER: RISK OF make sure to interrupt all power supply. ELECTROCUTION refrigerant" [ 4 10]) About the refrigerant (see "6.1 About the To clean showcases or blower coils, stop operation and turn OFF all power WARNING supplies.
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Page 10: About The System
4 About the system About the system Operation WARNING Operation modes Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may The system allows for only one operation mode: refrigeration. cause an electrical shock or fire. Contact your dealer. Operation range NOTICE Do NOT use the system for other purposes. -
Page 11: Recommended Maintenance And Inspection
7 Troubleshooting WARNING Malfunction Measure Water (other than defrost water) leaks Stop the operation. ▪ Do NOT pierce or burn refrigerant cycle parts. from the unit. ▪ Be aware that the refrigerant inside the system is The operation switch does NOT work Turn OFF the power odourless. -
Page 12: Error Codes: Overview
8 Relocation Error codes: Overview Code Cause Solution Communication error Check the connection of For your reference, a list with malfunction codes is provided. In case between the capacity up the communication cables a malfunction code appears, contact your installer to inform him of unit and the outdoor unit. -
Page 13: To Handle The Outdoor Unit
10 About the box WARNING Do NOT use the middle opening of the outdoor unit to attach the belts. ALWAYS use the outer openings. NOTICE ▪ Use a belt sling that adequately bears the weight of the unit. ▪ Use protection between the casing and the belts. Outdoor unit ▪... -
Page 14: To Remove The Accessories From The Outdoor Unit
11 About the units and options Capacity up unit NOTICE ▪ Use a belt sling that adequately bears the weight of the unit. ▪ Use protection between the casing and the belts. ▪ The width of the holes for belts in the outdoor unit is 70 mm. - Page 15 11 About the units and options Label about maximum storage temperature 55°C Label used for Text on label Translation The first two labels: from LRYEN10A7Y1 From LRYEN10A7Y1 or LREN12A7Y1B to or LREN12A7Y1B to Capacity up unit Refrigeration Refrigeration MAXIMUM STORAGE TEMPERATURE. The third label: Gas from Gas from...
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Page 16: System Layout
11 About the units and options Text on card Translation Text on the card Translation Any gas or oil remaining inside Any gas or oil remaining inside Warning Warning the stop valve may blow off the the stop valve may blow off the The safety valve included in the The safety valve included in the spun piping. -
Page 17: Unit Installation
12 Unit installation CAUTION Unit installation This equipment is NOT intended for use in residential locations and will NOT guarantee to provide adequate WARNING protection to radio reception in such locations. ▪ Install all necessary countermeasures in case of refrigerant leakage according to standard EN378 (see NOTICE "12.1.3 Additional installation site requirements for CO₂... - Page 18 12 Unit installation QLAV QLMV WARNING In case of mechanical ventilation, take care the ventilated air is exhausted to the outdoor space and NOT into another closed area. Refrigerant basic characteristics Refrigerant R744 RCL (refrigerant concentration limit) 0.072 kg/m QLMV (quantity limit with minimum ventilation) 0.074 kg/m QLAV (quantity limit with additional ventilation) 0.18 kg/m...
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Page 19: Opening And Closing The Unit
12 Unit installation Switch boxes of the outdoor unit 12.2 Opening and closing the unit The switch boxes behind the left, middle and right front panel are all opened in the same way. The main switchbox is installed behind the 12.2.1 To open the outdoor unit middle panel. -
Page 20: Mounting The Outdoor Unit
12 Unit installation Capacity up unit 3 Attach the small front plates to the front panels. 3× 8× Outdoor unit Capacity up unit 12.3 Mounting the outdoor unit ▪ The preferred installation is on a solid longitudinal foundation (steel beam frame or concrete). The foundation must be larger 12.3.1 To provide the installation structure than the grey marked area. -
Page 21: To Remove The Transportation Stay
13 Piping installation 12.3.3 To remove the transportation stay NOTICE Refrigerant R744 requires strict cautions for keeping the NOTICE system clean and dry. Foreign materials (including mineral If the unit is operated with the transportation stay attached, oils or moisture) should be prevented from getting mixed abnormal vibration or noise may be generated. -
Page 22: To Select The Piping Size
13 Piping installation Requirement Limit LREN* LREN* + LRNUN5* Maximum branch piping length ▪ Example refrigeration side: 50 m ▪ C+D+(E or F) ▪ c+d+(e or f) ▪ C+G ▪ c+g ▪ J ▪ j Maximum total equivalent piping length Low temperature: 150 m Refrigeration indoor unit Flow direction in refrigerant suction piping Example:... -
Page 23: To Select Refrigerant Branch Kits
13 Piping installation In case the required pipe sizes (inch sizes) are not available, it is 13.1.5 To select refrigerant branch kits also allowed to use other diameters (mm sizes), taken the following Always use K65 T-joints with a suitable design pressure for into account: refrigerant branching. -
Page 24: Using Stop Valves And Service Ports
13 Piping installation ▪ All service ports are of the backseat type and do not have a valve 13.2 Using stop valves and service core. ports ▪ After handling the service port, make sure to tighten the service port cap and the valve cap securely. WARNING ▪... -
Page 25: Connecting The Refrigerant Piping
13 Piping installation 5 Apply screw lock agent or silicon sealant to the screw thread when mounting the service port cap. Without it, moisture and condensing water may penetrate and freeze between the screw thread. As a result, refrigerant may leak and the service port cap may break. - Page 26 13 Piping installation Left side connection Front connection NOTICE Precautions when making knockout holes: ▪ Avoid damaging the casing. ▪ After making the knockout holes, we recommend you remove the burrs and paint the edges and areas around the edges using repair paint to prevent rusting. ▪...
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Page 27: Guidelines To Connect T-Joints
13 Piping installation Coming from the indoor units Going to the outdoor units Main refrigerant pipe Slanting downwards NOTICE Where joints are used on piping, avoid damage caused by Stop valve (gas) Stop valve (liquid) freezing or vibration. Gas pipe (accessory) Liquid pipe (accessory) 13.3.4 Guidelines to install a dryer... -
Page 28: About Safety Valves
13 Piping installation When brazing Follow the brazing instructions in the filter Safety valve type 34.877<A ×Kd <50.29 manual. If necessary, please use an adapter to Recommended safety valve: adjust the connection size. ▪ 3030E/46C (Brand: Castel) Remove the filter cap immediately before ▪... -
Page 29: About Changeover Valves
13 Piping installation ▪ the presence of a changeover valve and its kv value. For more information on changeover valves, see "13.4.2 About changeover valves" [ 4 29]. Changeo Maximum piping length (m) for Ø19.1 mm valve's elbows elbows elbows elbows elbows kV value 3-3,49 3,5-4,49 4,5-4,99... -
Page 30: Checking Refrigerant Piping: Setup
13 Piping installation 3 Pressurise both liquid side and gas side from service ports SP3, 13.5.1 Checking refrigerant piping: Setup SP7 and SP11. Always test the pressure according to EN378-2 and mind the set pressure of the pressure relief valve (if installed). -
Page 31: Insulating The Refrigerant Piping
14 Electrical installation In case of a leak 1 Find and repair the leak. 2 When done, perform the leak test and vacuum test again. See test" [ 4 30] and "13.5.3 To perform a leak "13.5.4 To perform drying" [ 4 30]. -
Page 32: About Electrical Compliance
14 Electrical installation NOTICE If the equipment is installed closer than 30 m to a residential location, the professional installer MUST evaluate the EMC situation before installation. 14.1 About electrical compliance This equipment (LREN* and LRNUN* ) complies with: ▪ EN/IEC 61000‑3‑11 provided that the system impedance Z less than or equal to Z at the interface point between the user's supply and the public system. -
Page 33: Field Wiring: Overview
14 Electrical installation 14.2 Field wiring: Overview X1M (A1P) X1M (A1P) X1M (A1P) X1M (A1P) L1 L2 L3 N C C1 W1 R P1 P2 C C1 W1 R P1 P2 L1 L2 L3 N IN/D UNIT OUT/D UNIT MULTI UNIT IN/D UNIT OUT/D UNIT MULTI UNIT... -
Page 34: Guidelines For Making Knockout Holes
14 Electrical installation 14.3 Guidelines for making knockout 14.4 Guidelines when connecting the holes electrical wiring ▪ To punch a knockout hole in a front panel, hit on it with a hammer. Use the following methods for installing wires: ▪ To punch a knockout hole in the bottom panel, drill holes where Wire type Installation method indicated. -
Page 35: Specifications Of Standard Wiring Components
14 Electrical installation DIII transmission wiring Terminal Screw size Tightening torque (N•m) Transmission wiring specification and limits X1M: Power supply 5.5~7.3 Only use harmonised wire providing double insulation and suitable for the applicable voltage. PE: Protective earth (screw) 2‑cord cable. X4M: Output signals 1.18~1.44 0.75~1.25 mm². -
Page 36: High Voltage Wiring - Outdoor Unit
14 Electrical installation Details – Remote low noise switch NOTICE Low noise switch. If you want to remotely turn ON/OFF low noise operation, you must install a low noise switch. Use a voltage-free contact for microcurrent (≤1 mA, X1M (A1P) 12 V DC). -
Page 37: Connections To The Capacity Up Unit
14 Electrical installation 14.7 Connections to the capacity up unit NOTICE ▪ Be sure to keep the power line and transmission line apart from each other (≥50 mm). Transmission wiring and power supply wiring may cross, but may not run parallel. -
Page 38: High Voltage Wiring - Capacity Up Unit
14 Electrical installation Details – Remote operation switch 14.7.2 High voltage wiring – Capacity up unit NOTICE Connections/routing/fixing Remote operation switch. The unit is factory-equipped with an operation switch with which you can turn unit L1 L2 L3 operation ON/OFF. If you want to remotely turn ON/OFF operation of the capacity up unit, a remote operation switch is required. -
Page 39: Charging Refrigerant
15 Charging refrigerant Wiring Only use harmonised wire NOTICE providing double insulation and Do NOT fully close the stop valve for field piping after the suitable for the applicable refrigerant has been charged into the unit. voltage. NOTICE 2-cord cable Do NOT fully close the liquid stop valve while the unit is 0.75~1.25 mm²... -
Page 40: To Charge Refrigerant
16 Configuration Type of indoor unit Total amount of WARNING refrigerant (kg) After charging refrigerant, keep the power supply and Blower coils operation switch of the outdoor unit ON to avoid a pressure increase on the low pressure (suction piping) side and to Showcases avoid pressure increase on the pressure side of the liquid Subtotal (e)+(f):... -
Page 41: Field Setting Components
16 Configuration Target evaporating temperature –20°C –25°C –30°C 1 2 3 4 1 2 3 4 –35°C Outdoor unit Capacity up unit Inspection hole Inspection hole cover –40°C Operation switch (S1S) Field setting components 7‑segment displays: ON ( ) OFF ( ) Flashing ( Push buttons: Factory setting... -
Page 42: To Access Mode 1 Or 2
17 Commissioning 1 To select the desired mode, push BS1. See also "16.1.4 To Description 2" [ 4 42]. access mode 1 or Mode 2 BS1 BS2 BS3 Setting 8 ▪ For mode 1: push BS1 and release it at once. (in mode 2) ▪... -
Page 43: Checklist Before Commissioning
17 Commissioning CAUTION Safety valve (accessory) After the refrigerant is fully charged, do NOT turn off the Check that the safety valve (accessory) has been installed operation switch and power supply of the outdoor unit. This correctly according to standards EN378-2 and EN13136. prevents the safety valve actuation due to an increase in Pipe size and pipe insulation internal... -
Page 44: Test Run Checks
17 Commissioning 2 Check that all electrical components and refrigerant piping is Parameter Range Root cause Countermeasure installed correctly, for the indoor units, outdoor unit, and (if when out of applicable) capacity up unit. range 3 Turn ON the power supply of all units: the indoor units, outdoor Suction ≤18°C Lack of amount... -
Page 45: Correcting After Abnormal Completion Of The Test Run
18 Troubleshooting ▪ Significant periods of non-use 17.4.2 Correcting after abnormal completion of the test run Furthermore, you can add: ▪ Instructions for shutting down the system in case of an emergency The test operation is only completed if there is no malfunction code displayed on the user interface or outdoor unit 7‑segment display. - Page 46 18 Troubleshooting Main code LREN* LRNUN5* Cause Solution Malfunction of electronic expansion valve coil Check connection on PCB or actuator. For LREN*: ▪ (Y1E) - A1P (X25A) ▪ (Y2E) - A1P (X23A) ▪ (Y3E) - A1P (X21A) ▪ (Y4E) - A2P(X22A) ▪...
- Page 47 18 Troubleshooting Main code LREN* LRNUN5* Cause Solution Malfunction of the liquid (after sub-cool) Check connection on PCB or actuator. temperature thermistor For LREN*: ▪ (R7T) – A1P (X30A) For LRNUN5*: ▪ (R7T) – A1P (X35A) ▪ (R5T) – A1P (X35A) Malfunction of high pressure sensor Check connection on PCB or actuator.
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Page 48: Technical Data
19 Technical data Technical data A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of the latest technical data is available on the Daikin Business Portal (authentication required). 19.1 Piping diagram: Outdoor unit... -
Page 49: Piping Diagram: Capacity Up Unit
19 Technical data 19.2 Piping diagram: Capacity up unit 15.9 C1220T-H 15.9 C1220T-H 3D128362B Pressure sensor Compressor with accumulator Pressure switch Plate heat exchanger Check valve Heat exchanger Service port Oil separator Electronic expansion valve Liquid receiver Filter Refrigerant pipe Propeller fan Oil and injection pipe LREN8~12A + LRNUN5A... -
Page 50: Wiring Diagram: Outdoor Unit
19 Technical data 19.3 Wiring diagram: Outdoor unit The wiring diagram is delivered with the unit: Pilot lamp (service monitor-green) (A1P, A2P, A3P, A4P, A5P, A9P, A10P, A11P) ▪ For the outdoor unit: At the inside of the left switch box cover. Reactor (A3P) ▪... - Page 51 19 Technical data This wiring diagram applies only to the capacity up unit. Thermistor (liquid separator outlet) Field wiring Thermistor (plate heat exchanger outlet) Terminal block Thermistor (liquid pipe) Connector Thermistor (M1C body) Terminal S1NPH High pressure sensor Protective earth (screw) S1NPM Medium pressure sensor S1PH...
- Page 52 4P704141-1 F 0000000Z 4P704141-1F 2024.12...
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