Table of Contents
Related Manuals for Lennox VRF VEC027N432U
Summary of Contents for Lennox VRF VEC027N432U
- Page 1 Mini VRF Cooling Only System User Manual VEC027N432U VEC034N432U VEC042N432U VEC048N432U VEC055N432U VEC060N432U 7KDQN \RX IRU VHOHFWLQJ /(112; DLU FRQGLWLRQHUV 3OHDVH UHDG WKLV PDQXDO FDUHIXOO\ EHIRUH RSHUDWLRQ and keep it for further reference.
- Page 2 To Users Thank you for selecting LENNOX’s product. Please read this instruction manual carefully before installing and using the product, so as to master and correctly use the product. In order to guide you to correctly install and use our product and achieve expected operating effect, we hereby instruct as...
- Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product. (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer.
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Page 4: Table Of Contents
Contents 1 Safety Notices (Please be sure to abide) ..............1 2 Product Introduction ....................3 2.1 Names of Main Parts ......................3 2.2 Combinations of Indoor and Outdoor Units ............... 4 2.3 Operating Range ......................4 3 Preparation before Installation ................. 4 3.1 Standard Parts ........................ -
Page 5: Safety Notices (Please Be Sure To Abide)
DC Inverter Multi VRF System 1 Safety Notices (Please be sure to abide) WARNING: If not abide strictly, it may cause severe damage to the unit or the people. NOTE! If not abide strictly, it may cause slight or medium damage to the unit or the people. This sign indicates that the operation must be prohibited. - Page 6 DC Inverter Multi VRF System When installation is finished, For units with wired please check and make sure controllers, do not connect the drain pipe, pipeline and power supply until the wired electric wire are all well controller is well installed. connected so as to avoid Otherwise, the wired controller water leakage, refrigerant...
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Page 7: Product Introduction
An all-pole disconnection device which has at least 3mm clearances in all poles, and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules. LENNOX will not assume responsibility for any personal injury or property loss caused by improper installation, improper debugging, unnecessary repair or not following the instructions of this manual. -
Page 8: Combinations Of Indoor And Outdoor Units
DC Inverter Multi VRF System ① ② ③ ④ ⑤ Electric box Name Motor Fan blade Gas pipe valve Liquid pipe valve assembly VEC027N432U VEC034N432U VEC042N432U Fig 2.1.2 ① ② ③ ④ ⑤ Electric box Name Motor Fan blade Gas pipe valve Liquid pipe valve assembly 2.2 Combinations of Indoor and Outdoor Units... -
Page 9: Standard Parts
DC Inverter Multi VRF System 3.1 Standard Parts Please use the supplied standard parts as required. Parts for Outdoor Unit Name Appearance Remark User Manual Must be connected to the Wiring (match with last IDU of communication resistance) connection Corrugated pipe Chassis gluey plug Drainage joint VEC027N432U... -
Page 10: Piping Work Requirements
DC Inverter Multi VRF System If the ODU is totally surrounded by walls, please refer to the following figures for space dimension: Fig 3.2.1 3.3 Piping Work Requirements Refer to the table below for piping work requirements: R410A Refrigerant System Outer diameter (mm/inch) Wall thickness (mm) Φ6.35(1/4) -
Page 11: Dimension Of Outdoor Unit And Mounting Hole
DC Inverter Multi VRF System 4.1 Dimension of Outdoor Unit and Mounting Hole Unit Outline and Installation Dimension(mm). Fig 4.1.1 Unit:mm Model VEC048N432U VEC055N432U 1345 VEC060N432U Fig 4.1.2... -
Page 12: Connection Pipe
DC Inverter Multi VRF System Unit:mm Model VEC027N432U VEC034N432U VEC042N432U 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.4.2.1.1 4.2.2 Allowable Length and Height Difference of Connection Pipe Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in the figure below: NOTE! Equivalent length of one Y-type branch is 0.5m. - Page 13 DC Inverter Multi VRF System Allowable Fitting pipe value ODU at upper side —— Height difference between ODU and ODU at lower side —— Height difference between IDUs —— Piping parameters of VEC048N432U, VEC055N432U, VEC060N432U. Allowable Fitting pipe value Total length (actual length) of fitting pipe 300m L1+L2+L3+a+b+c+d Actual length...
- Page 14 DC Inverter Multi VRF System 4.2.3 Dimension of Pipe (Main Pipe) from ODU to the 1st Indoor Branch Dimension of pipe from ODU to the 1st indoor branch will be determined by the dimension of outdoor connection pipe. Fig 4.2.3.1 Dimension of outdoor connection pipe.
- Page 15 DC Inverter Multi VRF System R410A Refrigerant system Total capacity of downstream indoor units X (kW) Model X<20 VEBC01A 20≤X≤30 VEBC01B Y type branch 30<X≤70 VEBC02A 70<X≤135 VEBC03A 135<X VEBC04A 4.2.5 Dimension of Pipe between Indoor Branches Select pipe between indoor branches according to the capacity of downstream indoor units; if the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails.
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Page 16: Installation Of Connection Pipe
DC Inverter Multi VRF System Rated capacity of IDU C(kW) Gas pipe (mm) Liquid pipe (mm) C≤2.8 Φ9.52 Φ6.35 2.8<C≤5.0 Φ12.7 Φ6.35 5.0<C≤14.0 Φ15.9 Φ9.52 14.0<C≤16.0 Φ19.05 Φ9.52 16.0<C≤28.0 Φ22.2 Φ9.52 NOTE! If the distance between IDU and its nearest branch is over 10m, then the liquid pipe of IDU (rated capacity ≤5.0kW) shall be enlarged. - Page 17 DC Inverter Multi VRF System (2) Do not bend the pipe over 90°. (3) If pipe is repeatedly bent or stretched, it will get hard and difficult to bend and stretch again. Therefore, do not bend or stretch the bend for over 3 times. (4) In case that direct bending will open cracks to the pipe, first use sharp cutter to cut the insulating layer, as shown in Fig.4.3.3.2.
- Page 18 DC Inverter Multi VRF System Below is the piping diagram of VEC027N432U, VEC034N432U, VEC042N432U, VEC048N432U, VEC055N432U, VEC060N432U. According to customer requirement or space limit, outlet pipe can be installed from the front, right or rear side. Fig 4.3.5.1 Fig 4.3.5.2 4.3.6 Installation of Y-type Branch (1) Y-type Branch.
- Page 19 DC Inverter Multi VRF System Fig 4.3.6.2 (4) Branch shall be isolated by insulating material that can bear 120°C or even higher temperature. The attached foam of branch cannot be taken as insulating material. 4.3.7 Thermal Insulation for Pipeline (1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection. (2) At the branch inlet, leave at least 500mm straight pipe section.
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Page 20: Disassembly Of Compressor Feet
DC Inverter Multi VRF System 4.3.8 Support and Protection of Pipeline (1) Support should be made for hanging connection pipe. Distance between each support cannot be over 1m. (2) Protection against accidental damage should be made for outdoor pipeline. When pipeline exceeds 1m, a pinch board should be added for protection. - Page 21 DC Inverter Multi VRF System (3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor valve, as shown below. Fig 4.5.1.1 4.5.2 Refrigerant Adding (1) Refrigerant quantity of outdoor unit before delivery: Model VEC027N432U VEC034N432U VEC042N432U...
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Page 22: Electric Wiring
DC Inverter Multi VRF System (3) Calculation example. Fig 4.5.2.1 IDU: IDU ① IDU ② IDU ③ IDU ④ Duct type Duct type Duct type Duct type Model VESD024N432U VESD017N432U VESD012N432U VESD008N432U Liquid pipe: Pipe size Φ9.52 Φ9.52 Φ9.52 Φ6.35 Length Pipe size Φ9.52... - Page 23 DC Inverter Multi VRF System (7) An all-pole disconnection device which has at least 3mm clearances in all poles, and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules. (8) Details of type and rating for fuse: Model: VEC048N432U, VEC055N432U, VEC060N432U.
- Page 24 DC Inverter Multi VRF System Circuit breaker Number of ground wire Number of power cord Model Power supply capacity × Min sectional area × Min sectional area 220~240V 50Hz VEC055N432U 1×6.0 2×6.0 208~230V 60Hz 220~240V 50Hz 1×6.0 2×6.0 VEC060N432U 208~230V 60Hz NOTES! ①...
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Page 25: Check Items After Installation And Test Operation
DC Inverter Multi VRF System Fig 4.6.3.2 Engineering Wiring View of VEC048N432U, VEC055N432U, VEC060N432U 5 Check Items after Installation and Test Operation 5.1 Check Items after Installation Check items Possible conditions due to improper installation Check Each part of the unit is installed securely? Unit may drop, shake or emit noise. - Page 26 DC Inverter Multi VRF System (2) All control circuits and wires are correctly and securely connected. (3) Check whether the fixing loops for compressor foots are removed. (4) All small pieces, especially metal chips, thread ends and forceps holder, must be removed from the unit.
- Page 27 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status “00~16” displays the quantity of indoor unit identified by the Display system. “CL” means the amount of indoor unit is very little 00~16/CL circularly (amount of indoor unit<2), at this moment, all buttons are...
- Page 28 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status System is lack of refrigerant and display will be as in the left. Please cut off power of IDU and ODU and check if there is leakage on pipeline.
- Page 29 DC Inverter Multi VRF System 5.2.3 Appendix: Reference of Normal Operation Parameters Debug item Parameter name Unit Reference Outdoor temperature °C —— When compressor starts, discharge temp in cool mode is within 70~105°C and at least 10°C higher than the Compressor discharge high pressure saturation temp.
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Page 30: Common Malfunctions And Troubleshooting
Too many heat resources in the room. Reduce heat resources. Filter is blocked and dirty. Clean the filter. NOTE! If problem cannot be solved after checking the above items, please contact LENNOX service center and describe the cases and models. -
Page 31: Error Indication
DC Inverter Multi VRF System (2) Following circumstances are not malfunctions. Malfunction Reason Unit starts up immediately after it is Overload protection switch makes it run after a 3-min turned off. delay. Unit doesn’t run. Power is just turned on. Standby operation lasts for about 1min. - Page 32 DC Inverter Multi VRF System Error Code Content Error Code Content High discharge temperature protection Malfunction of DC motor of compressor High discharge temperature protection Malfunction of outdoor ambient of compressor 1 temperature sensor Drop protection of discharge Malfunction of defrosting temperature temperature sensor of compressor 1 sensor 1 Over-current protection of compressor...
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Page 33: Maintenance And Care
DC Inverter Multi VRF System Error Code Content Error Code Content Wrong setting of ODU’s capacity Alarm because project code of IDU is code/jumper cap inconsistent Refrigerant-lacking protection Emergency status of compressor Wrong address for driving board of Emergency status of fan compressor Alarm because valve is abnormal Rated capacity is too high... -
Page 34: Drain Pipe
Otherwise, it may lead to danger. Use nitrogen or refrigerant to conduct the tests. 9 After-sales Service If there’s quality defect or other problems in the product, please contact LENNOX local after-sales service department for help. Warranty must be based on the following conditions: (1) Product’s initial startup must be performed by professional technicians from LENNOX service... - Page 36 &RQWDFW XV DW OHQQR[JOREDOKYDF#OHQQR[LQWOFRP /HQQR[ ,QGXVWULHV ,QF )RU D FRPSOHWH OLVW RI WKH UHJLVWHUHG DQG FRPPRQ ODZ WUDGHPDUNV RZQHG E\ /HQQR[ ,QGXVWULHV ,QF SOHDVH YLVLW ZZZOHQQR[FRP...