Related Manuals for Lennox VEP034N432US
Summary of Contents for Lennox VEP034N432US
- Page 1 DC Inverter Multi VRF System User Manual Thank you for selecting LENNOX air conditioners. Please read this manual carefully before operation and keep it for further reference.
- Page 2 (7) The final right to interpret for this instruction manual belongs to LENNOX.
- 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 ......................4 2.2 Combinations of Indoor and Outdoor Units ............... 5 2.3 Operating Range ......................5 3 Preparation before Installation ................. 6 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 Diameter of power cord must After the power cord is be large enough. Damaged connected, please install the power cord or connecting wire cover of electric box to avoid must be replaced by danger. specialized electric cable. Short circuit is forbidden.
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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: Names Of Main Parts
Fig.1 ① ② ③ ④ ⑤ Electric box Name Motor Fan blade Gas pipe valve Liquid pipe valve assembly VEP027N432US VEP034N432US VEP042N432US Fig.2 ① ② ③ ④ ⑤ Electric box Name Motor Fan blade Gas pipe valve Liquid pipe valve... -
Page 9: Combinations Of Indoor And Outdoor Units
(1) See below the number of indoor units that can be connected to the outdoor unit. (2) The total capacity of indoor units should be within 50%~135% of that of the outdoor unit. Model Max sets of connectable IDUs VEP034N432US VEP042N432US VEP048N432US VEP042N432U... -
Page 10: Preparation Before Installation
Must be connected to the Wiring (match with last IDU of communication resistance) connection Corrugated pipe Chassis gluey plug Drainage joint VEP027N432US Tube Connector VEP034N432US Sub-assay VEP042N432US NOTE: Some accessories are not available for some models. Please refer to the present product for details. -
Page 11: Installation Site
DC Inverter Multi VRF System 3.2 Installation Site Forbidden item! Improper operation might lead to personal injury or even death. Item needs to be followed. Improper operation might lead to personal injury or property damage. Select a location which is strong The installation position should enough to hold unit’s weight so withstand strong wind, typhoon... -
Page 12: Installation Instruction
DC Inverter Multi VRF System 4 Installation Instruction NOTE: Graphics here are only for reference. Please refer to actual products. Unspecified dimensions are all in mm. 4.1 Dimension of Outdoor Unit and Mounting Hole Unit Outline and Installation Dimension(mm). Fig.5 Unit: mm Model VEP042N432U... - Page 13 DC Inverter Multi VRF System Fig.6 Unit: mm Model VEP027N432US VEP034N432US VEP042N432US VEP048N432US...
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Page 14: Connection Pipe
DC Inverter Multi VRF System 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.7... - Page 15 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. Fig.8 Allowable Length and Height Difference of Connection Pipe Piping parameters of VEP027N432US, VEP034N432US, VEP042N432US. Allowable Fitting pipe value Total length (actual length) of fitting pipe...
- Page 16 Dimension of pipe from ODU to the 1st indoor branch will be determined by the dimension of outdoor connection pipe. Fig.9 Dimension of outdoor connection pipe. Pipe dimension Basic module Gas pipe (mm) Liquid pipe (mm) Φ15.9 Φ9.52 VEP027N432US VEP034N432US Φ15.9 Φ9.52 VEP042N432US Φ15.9 Φ9.52 Φ15.9 Φ9.52 VEP048N432US Φ15.9 Φ9.52 VEP042N432U Φ15.9...
- Page 17 DC Inverter Multi VRF System 4.2.4 Selection of Indoor Branches Select indoor branches according to the total capacity of downstream indoor units. If the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails. Fig.10 R410A Refrigerant system Total capacity of downstream indoor units X (kW) Model X<20...
- Page 18 DC Inverter Multi VRF System 4.2.6 Dimension of Pipe between Indoor Branch and IDU Dimension of pipe between indoor branch and IDU should be consistent with the dimension of indoor pipe. Fig. 12 Rated capacity of IDU C(kW) Gas pipe (mm) Liquid pipe (mm) C≤2.8 Φ9.52...
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Page 19: Installation Of Connection Pipe
DC Inverter Multi VRF System 4.3 Installation of Connection Pipe 4.3.1 Precautions for the Installation of Connection Pipe (1) Conform to the following principles during pipe connection: Connection pipe should be as short as possible, so is the height difference between indoor and outdoor units. Keep the number of bends as little as possible. - Page 20 DC Inverter Multi VRF System 4.3.4 Indoor Pipe Connection (1) Remove pipe cover and pipe plug. (2) Direct the flared part of copper pipe to the center of screwed joint. Twist on the flared nut tightly by hand, as in Fig.16 (Make sure indoor pipe is correctly connected. Improper location of the center will prevent flared nut from being securely twisted.
- Page 21 DC Inverter Multi VRF System Below is the piping diagram of VEP027N432US, VEP034N432US, VEP042N432US, VEP048N432US, VEP042N432U, VEP048N432U, VEP060N432U. According to customer requirement or space limit, outlet pipe can be installed from the front, right or rear side. Fig. 18 Fig.19 4.3.6 Installation of Y-type Branch...
- Page 22 DC Inverter Multi VRF System proper dimension and remove burrs as well. See Fig.20. (3) Y-type branch must be installed vertically or horizontally. Fig. 21 (4) Branch shall be isolated by insulating material that can bear 120° or even higher temperature.
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Page 23: Disassembly Of Compressor Feet
DC Inverter Multi VRF System 7) After wrapping the pipe, apply sealing material to completely seal the hole on the wall. 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. - Page 24 (3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor valve, as shown below. Fig. 24 4.5.2 Refrigerant Adding (1) Refrigerant quantity of outdoor unit before delivery: VEP027N432US VEP034N432US VEP042N432US Model Refrigerant Qty (kg) 1.80 1.80 2.00...
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Page 25: Electric Wiring
DC Inverter Multi VRF System (3) Calculation example. Fig. 25 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 26 Model: VEP048N432US, VEP042N432U, VEP048N432U, VEP060N432U. Ceramic 250V5A (front main board), ceramic 250V3.15A (back main board). Model: VEP027N432US, VEP034N432US, VEP042N432US. Ceramic 250V5A (front main board), ceramic 250V30A (front main board). (9) Connect the unit to specialized grounding device and make sure it is securely grounded. It’s a must to install air switch and current circuit breaker that can cut off the power of the entire system.
- Page 27 Min sectional × Min sectional area area (mm 220~240V 50Hz 1×2.5 2×2.5 VEP027N432US 208~230V 60Hz 220~240V 50Hz 1×2.5 2×2.5 VEP034N432US 208~230V 60Hz 220~240V 50Hz VEP042N432US 1×2.5 2×2.5 208~230V 60Hz 220~240V 50Hz 1×2.5 2×2.5 VEP042N432U 208~230V 60Hz 220~240V 50Hz 1×6.0...
- Page 28 If there are differences between the figure structure and actual unit, please refer to the actual unit. (4) For engineering wiring, please refer to the wiring diagram provided with the unit. Fig. 28 Engineering Wiring View of VEP027N432US, VEP034N432US and VEP042N432US Fig. 29 Engineering Wiring View of VEP048N432US...
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Page 29: Check Items After Installation And Test Operation
DC Inverter Multi VRF System Fig. 30 Engineering Wiring View of VEP042N432U, VEP048N432U, VEP060N432U, 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 30 8 hours. Touch the unit to check whether it’s normally preheated. If yes, start test operation. Otherwise, compressor might be damaged. 5.2.2 Test Operation and Debugging Description of test operation procedures and main board display of ODU VEP027N432US, VEP034N432US, VEP042N432US, VEP042N432U, VEP048N432U, VEP060N432U, Description of each stage of debugging progress ——...
- Page 31 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Progress code Status code Code meaning and operation LED1 LED2 LED3 method Progress Display Display Display Code Code Code status status status Allocation is finished. 2s later, next step starts.
- Page 32 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Progress code Status code Code meaning and operation LED1 LED2 LED3 method Progress Display Display Display Code Code Code status status status System detects no error on outdoor component.
- Page 33 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Progress code Status code Code meaning and operation LED1 LED2 LED3 method Progress Display Display Display Code Code Code status status status Outdoor valves are not fully turned on.
- Page 34 DC Inverter Multi VRF System VEP048N432US Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status System is not debugged, hold main board’s SW3 button for 5s to start debugging. 01_Set master unit 2s later, next step starts.
- Page 35 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status System detects error on indoor components. XX means the project code of IDU with error, e.g. no.1 IDU has d5 and d6 errors, meanwhile no.3 IDU displays error d6 and d7, then 07/XX/error Display...
- Page 36 DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Code meaning and operation method Progress Code Display status Debugging for cooling mode. If no malfunction occurs for Display 50min when compressor is running, then the system is 15/AC 15_ Cooling circularly...
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Page 37: Common Malfunctions And Troubleshooting
① If there is abnormal condition (e.g. unpleasant smell), turn unit off and disconnect power immediately. Then contact LENNOX authorized service center. If unit continues operation despite the abnormal condition, it may get damaged and lead to electric shock or fire hazard. -
Page 38: Error Indication
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. (2) Following circumstances are not malfunctions. Malfunction... - Page 39 DC Inverter Multi VRF System Outdoor: Error Code Content Error Code Content Malfunction of ODU (uniform) Main board of ODU is poor High-pressure protection Malfunction of high-pressure sensor Discharge low-temperature protection Malfunction of low-pressure sensor Malfunction of discharge temperature Low-pressure protection sensor of compressor 1 High discharge temperature protection of Malfunction of DC motor...
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Page 40: Maintenance And Care
DC Inverter Multi VRF System Debugging: Error Code Content Error Code Content Preheat time of compressor is insufficient Malfunction of lack of IDU 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... -
Page 41: 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 44 Contact us at +1-305-718-2901 lennoxglobalhvac@lennoxintl.com ©2020 Lennox Industries Inc For a complete list of the registered and common law trademarks owned by Lennox Industries Inc., please visit www.lennox.com...