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©2018 Lennox Industries Inc.
Dallas, Texas, USA
MODEL NUMBER IDENTIFICATION
V = Variable Refrigerant Flow (VRF)
26 = 22 Tons
.25
288 = 24 Tons
096 = 8 Tons
= 25.5 Tons
120 = 10 Tons
3
= 27.5 Tons
132 = 1 Tons
3
= 28.5 Tons
150 = 12 5 Tons
360 = 30 Tons
171 = 14
Tons
38 = 32 Tons
192 = 16 Tons
210 = 17.5 Tons
40 = 33.5 Tons
4
= 35 Tons
228 = 19 Tons
438 = 36.5 Tons
246 = 20.5 Tons
Thank you for selecting Lennox VRF. Please read this manual
carefully before operation and keep it for further reference.
Brand/Family
=
Nominal Cooling Capacity - Tons
= 38 Tons
= 54 Tons
= 40 Tons
= 56 Tons
= 41.5 Tons
= 57.5 Tons
= 43 Tons
= 59 Tons
= 45 Tons
= 60.5 Tons
= 46 Tons
= 62.5 Tons
= 47.5 Tons
= 63.5 Tons
= 49 Tons
= 62 Tons
= 51 Tons
= 67 Tons
30 = 52.5 Tons
= 68.5 Tons
= 70 Tons
INSTALLATION/OPERATION
INSTRUCTIONS
VEP Heat Pump
VRF SYSTEMS
OUTDOOR UNITS
VEP075N432K
VEP096N432K
VEP120N432K
VEP132N432K
VEP150N432K
VEP171N432K
VEP192N432K
VEP210N432K
1
Internal Use Only
32 = Internal Use
Refrigerant Type
4 = R-410A
Certification Status
N = ETL (220V and 460V)
6 - 70 Tons
Future Use
Voltage
K = 220V/3Ph/50-60Hz
G = 460V/3Ph/60Hz
N = 380-415V/3Ph/50-60Hz
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Table of Contents
Related Manuals for Lennox VEP Series
Summary of Contents for Lennox VEP Series
- Page 1 = 67 Tons 438 = 36.5 Tons 246 = 20.5 Tons 30 = 52.5 Tons = 68.5 Tons = 70 Tons Thank you for selecting Lennox VRF. Please read this manual carefully before operation and keep it for further reference.
- Page 2 We have the right to make necessary revision to the product from time to time due to the reason of sales or production, and reserve the right to revise the contents without further notice. (8) The final right to interpret for this instruction manual belongs to Lennox.
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Page 3: Table Of Contents
Contents 1 Safety Precautions ......................1 2 Product Introduction ......................2 2.1 Names of Main Parts ......................2 2.2 Combinations of Outdoor Units ....................3 2.3 Combinations of Indoor and Outdoor Units ................4 2.4 The Range of Production Working Temperature ..............5 3 Preparation before Installation .................... -
Page 4: Safety Precautions
(18) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please contact Lennox appointed service center for help. (19) Before installation, please check if the power supply is in accordance with the requirements specified on the nameplate. -
Page 5: Product Introduction
(26) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main power supply, and then immediately contact Lennox appointed service ce nter. If abnormality keeps going, the unit might be damaged and lead to electric shock or fire. -
Page 6: Combinations Of Outdoor Units
Lennox VRF Unit 2.2 Combinations of Outdoor Units Model(Single) VEP228N432K VEP246N432K VEP267N432K VEP288N432K VEP096N432K VEP096N432K VEP096N432K VEP096N432K Model(Combined) + VEP132N432K + VEP150N432K + VEP171N432K + VEP192N432K Model(Single) VEP306N432K VEP330N432K VEP342N432K VEP360N432K VEP096N432K VEP120N432K VEP132N432K VEP150N432K Model(Combined) + VEP210N432K + VEP210N432K... -
Page 7: Combinations Of Indoor And Outdoor Units
Lennox VRF Unit 2.3 Combinations of Indoor and Outdoor Units (1)The following table indicates the number of IDU for ODU ODU Model Max number of connectable IDU (unit) VEP075N432K VEP096N432K VEP120N432K VEP132N432K VEP150N432K VEP171N432K VEP192N432K VEP210N432K VEP228N432K VEP246N432K VEP267N432K VEP288N432K... -
Page 8: The Range Of Production Working Temperature
Lennox VRF Unit Fig.2 Fig.2 is the combination view of the ODU of Modular DC Inverter Multi VRF System and the IDU of Multi VRF System. IDU can be cassette type, one-way cassette type, wall-mounted type, duct type, etc. When any one IDU receives operation signal, ODU will start to work according to the capacity;... -
Page 9: Preparation Before Installation
Lennox VRF Unit 3 Preparation before Installation NOTICE! The picture is only used for reference and the actual product prevails. Unit: mm(in.). 3.1 Standard Parts Please use the following standard parts supplied by Lennox. Parts for Outdoor Unit Number Name Picture... - Page 10 Lennox VRF Unit 3.2.1 When the outdoor unit is totally surrounded by walls, please refer to following figures for space dimension. 3.2.1.1 Space dimension for single-module unit Unit: mm(in.) Fig.3 3.2.1.2 Space dimension for dual-module unit Unit: mm(in.) Fig.4...
- Page 11 Lennox VRF Unit 3.2.1.3 Space dimension for three-module unit Unit: mm(in.) Fig.5 3.2.1.4 Space dimension for four-module unit Unit: mm(in.) Fig.6...
- Page 12 Lennox VRF Unit 3.2.2 When there is wall (or similar obstruction) above the unit, keep the distance between the unit top and the wall at least 3000mm (118-1/8in.) or above. When the unit is located in a totally open space with no obstructions in four directions, keep the distance between the unit top and wall at least 1500mm (59in.) or above (See...
- Page 13 Lennox VRF Unit Fig.10 3.2.4 Take seasonal wind into consideration when installing the outdoor unit （1）Installation requirements for unit not connecting exhaust duct: Fig.11 Fig.12...
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Page 14: Piping Work Requirements
Lennox VRF Unit （2）Installation requirements for unit connecting exhaust duct: Fig.13 3.2.5 Take snow into consideration when installing the outdoor unit Fig.14 3.3 Piping Work Requirements Refer to the table below for piping work requirements. R410A Refrigerant System Outer Diameter (mm/in.) Wall Thickness mm(in.) -
Page 15: Installation Instruction
Lennox VRF Unit 4 Installation Instruction 4.1 Physical Dimension of the Outdoor Unit and Mounting Hole Outline and Physical Dimention of VEP075N432K and VEP096N432K unit. Unit: mm(in.) Fig.15... - Page 16 Lennox VRF Unit Outline and Physical Dimention of VEP120N432K, VEP132N432K and VEP150N432K unit. Unit: mm(in.) Fig.16...
- Page 17 Lennox VRF Unit Outline and Physical Dimention of VEP171N432K, VEP192N432K and VEP210N432K unit. Unit: mm(in.) Fig.17...
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Page 18: Connection Pipe
Lennox VRF Unit 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.18 4.2.2 Schematic Diagram of Piping Sequence VEP075N432K and VEP096N432K Fig.19... - Page 19 Lennox VRF Unit VEP120N432K, VEP132N432K and VEP150N432K Fig.20 VEP171N432K, VEP192N432K and VEP210N432K Fig.21 4.2.3 Allowable pipe length and drop height among indoor and outdoor units Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in the figure below.
- Page 20 Lennox VRF Unit Unit: m(ft.) Fig.22 L10: Length from the first branch to the farthest IDU; L11: Length from the first branch to the nearest IDU; Equivalent length of branch of IDU is 0.5m(1-3/4ft.). Allowable Value R410A Refrigerant System Fitting Pipe m(ft.)
- Page 21 Lennox VRF Unit ①. Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m (131-1/4ft.). Under the following conditions, the length can reach 90m (295-1/4ft.). a) Actual length of pipe in total: L1+L2x2+L3x2+L4x2+…+L9x2+a+b+…+i+j≤1000m (3280-3/4ft.).
- Page 22 Lennox VRF Unit Outdoor Model Gas pipe size mm(in.) Liquid pipe size mm(in.) VEP648N432K Φ51.4(2) Φ25.4(1) VEP669N432K Φ51.4(2) Φ25.4(1) Φ51.4(2) Φ25.4(1) VEP690N432K Φ51.4(2) Φ25.4(1) VEP708N432K Φ51.4(2) Φ25.4(1) VEP726N432K VEP750N432K Φ51.4(2) Φ25.4(1) Φ51.4(2) Φ25.4(1) VEP762N432K Φ51.4(2) Φ25.4(1) VEP780N432K Φ51.4(2) Φ25.4(1) VEP801N432K VEP822N432K Φ51.4(2)
- Page 23 Lennox VRF Unit 4.2.5 Fitting pipe between Outdoor Unit and the First Manifold 4.2.5.1 For single module system, pipe size (between outdoor unit and the first manifold)is determined by that of outdoor unit. Fig.25 Pipe size of basic outdoor module is shown as follows:...
- Page 24 Lennox VRF Unit Pipe between module and branch of ODU Basic Module Gas Pipe mm(in.) Liquid Pipe mm(in.) VEP075N432K Φ19.05(3/4) Φ9.52(3/8) VEP096N432K Φ22.2(7/8) Φ9.52(3/8) VEP120N432K Φ25.4(1) Φ12.7(1/2) VEP132N432K Φ25.4(1) Φ12.7(1/2) VEP150N432K Φ28.6(1-1/8) Φ12.7(1/2) VEP171N432K Φ28.6(1-1/8) Φ15.9(5/8) VEP192N432K Φ28.6(1-1/8) Φ15.9(5/8) VEP210N432K Φ28.6(1-1/8)
- Page 25 Lennox VRF Unit 4.2.5.4 Fitting pipe between the first manifold from indoor unit and the end manifold from outdoor unit Single module unit Fig.28 Pipe between ODU and the first branch of IDU Basic Module(single module) Gas Pipe mm(in.) Liquid Pipe mm(in.) VEP075N432K Φ19.05(3/4)
- Page 26 Lennox VRF Unit Pipe between ODU and the first branch of IDU Total rated capacity of outdoor modules (multi-modular system) Gas Pipe mm(in.) Liquid Pipe mm(in.) VEP228N432K Ф28.6(1-1/8) Ф15.9(5/8) VEP246N432K Ф31.8(1-1/4) Ф19.05(3/4) VEP267N432K Ф31.8(1-1/4) Ф19.05(3/4) VEP288N432K Ф31.8(1-1/4) Ф19.05(3/4) VEP306N432K Ф31.8(1-1/4) Ф19.05(3/4)
- Page 27 Lennox VRF Unit 4.2.5.5 Manifold at indoor unit side Manifold at indoor unit side can be selected as per total capacity of downstream indoor unit(s). Refer to the following table. Fig.30(a) Fig.30(b) Total capacity of downstream R410A Refrigerant System Model indoor unit(s) - kW (Btu) C＜20.0 (68000)
- Page 28 Lennox VRF Unit 4.2.5.6 Fitting pipe between manifolds Pipe size (between two manifolds at indoor unit side) is based on the total capacity of upstream indoor unit(s). Fig.31 Dimension of the pipe of indoor branch Total capacity of downstream indoor unit(s) - kW (Btu/h) Gas Pipe mm(in.)
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Page 29: Installation Of The Connection Pipe
Lennox VRF Unit Pipe between indoor branch and IDU Rated capacity of indoor unit C - kW (Btu/h) Gas Pipe mm(in.) Liquid Pipe mm(in.) C≤2.8 (9000) Φ9.52(3/8) Φ6.35(1/4) 2.8(9000)＜C≤5.0 (17000) Φ12.7(1/2) Φ6.35(1/4) 5.0(17000)＜C≤14.2 (48000) Φ15.9(5/8) Φ9.52(3/8) 14.2(48000)＜C≤22.4 (76000) Φ19.05(3/4) Φ9.52(3/8) 22.4(76000)＜C≤28.0 (96000) - Page 30 Lennox VRF Unit 4.3.2 Manifold (1) Y-type manifold, See the Fig.34(a). T-type manifold, See the Fig. 34(b) Fig. 34(a) Fig. 34(b) (2) Manifold has serveral pipe sections with different pipe size, which facilitates to match with various copper pipe. Use pipe cutter to cut in the middle of the pipe section with different pipe size and deburr as well.
- Page 31 Lennox VRF Unit Fig. 36(a) Fig. 36(b) (4) Manifold is isolated by insulating material that can bear 120℃ or higher temperature. Manifold attached foam can not be taken as insulating material. 4.3.3 Installation and thermal insulation for pipeline (1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
- Page 32 Lennox VRF Unit Unit: mm(in.) Fig. 37 (3) There must be three fixing point for both horizontal and vertical installation of the Y-type manifold. See Fig. 38. Fixing point 1: 100mm(4in) on the main inlet manifold from the welding point Fixing point 2: 200mm(7-7/8in.) on the main branched pipe from the welding point...
- Page 33 Lennox VRF Unit Fig. 39 (5) Thermal insulation for pipeline 1) To avoid condensate or water leakage on connecting pipe, the gas pipe and liquid pipe must be wrapped with thermal insulating material and adhesive pipe for insulation from the air.
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Page 34: Air Purging And Refrigerant Charge
Lennox VRF Unit 4) Manifold attached foam can not be taken as insulating material. 5) When wrapping the tape, the later circle should cover half of the former one. Don’t wrap the tape so tightly, otherwise the insulation effect will be weakened. - Page 35 Lennox VRF Unit Diameter of liquid pipe mm( in.) 28.6(1-1/8) 25.4(1) 22.2(7/8) 19.05(3/4) 15.9(5/8) 12.7(1/2) 9.52(3/8) 6.35(1/4) kg/m 0.680 0.520 0.350 0.250 0.170 0.110 0.054 0.022 OZ/in. 0.61 0.47 0.31 0.22 0.15 0.10 0.05 0.02 ∑Refrigerant charging amount B of every module...
- Page 36 Lennox VRF Unit Suppose that A (Quantity of refrigerant added to connection pipe) = ∑ Length of liquid pipe x Quantity of refrigerant added to liquid pipe per meter) = 5kg(11lbs) R (Quantity of added refrigerant in total) = 5+0=5kg(11lbs) Modular combination of outdoor unit subjects to combinations that are currently available.
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Page 37: Electric Wiring
Lennox VRF Unit ① Flow direction of refrigerant leakage. ② Room for refrigerant leakage. Since the concentration of refrigerant is greater than that of air, pay attention to the spaces where the refrigerant may residue, for example, the basement. 4.5 Electric Wiring 4.5.1 Wiring precautions... - Page 38 Lennox VRF Unit Maximum Minimum Circuit Power Supply Fuse Capacity Overcurrent Ampacity Outdoor units Protection V/Ph/Hz VEP075N432K 208V/230V 3~ 60Hz VEP096N432K 208V/230V 3~ 60Hz VEP120N432K 208V/230V 3~ 60Hz VEP132N432K 208V/230V 3~ 60Hz VEP150N432K 208V/230V 3~ 60Hz VEP171N432K 208V/230V 3~ 60Hz...
- Page 39 Lennox VRF Unit VEP630N432K 208V/230V 3~ 60Hz 150+150+150 113+113+113 150+150+150 60+90+125+ VEP648N432K 208V/230V 3~ 60Hz 38+65+99+113 60+90+125+150 60+110+125+ VEP669N432K 208V/230V 3~ 60Hz 38+89+99+113 60+110+125+150 60+125+125+ VEP690N432K 208V/230V 3~ 60Hz 38+99+99+113 60+125+125+150 60+125+150+ VEP708N432K 208V/230V 3~ 60Hz 38+99+113+113 60+125+150+150 60+150+150+ VEP726N432K...
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Page 40: System Communication
Lennox VRF Unit 4.6 System Communication 4.6.1 Communication system include: Communication among outdoor basic modules. Communication between ODU and IDU. Communication among IDUs. Communication between IDU and wired controller. Connection between IDU and light board receiver. Communication between different refrigeration systems. - Page 41 Lennox VRF Unit the communication wire between IDU and IDU/ODU must use shielded twisted pair. Select communication wire between IDU and wired controller Total length of communication line Material type between IDU unit and Wire size Remarks wired controller L m(ft.)
- Page 42 Lennox VRF Unit Fig.47 Fig.48 Fig.49...
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Page 43: Connection Method And Steps For System Communication
Lennox VRF Unit All communication wires of VRF are connected by screws. Fig.50 If a single communication wire is not long enough and needs to be connected, the connected joint must be welded or pressure-welded. Do not simply twist the wires together. - Page 44 Lennox VRF Unit Fig.51 Fig.52 For modular outdoor units, if there are multiple outdoor modules, then the master unit must be the first outdoor module on the communication wire and should not connect with IDU (master unit is set by SA8 of the outdoor main board).
- Page 45 Lennox VRF Unit 4.7.2 Communication connection between IDU and wired controller There are 4 kinds of connection between IDU and wired controller, as shown below Fig.53 One wired controller controls one IDU Fig.54 Two wired controllers control one IDU Fig.55 One wired controller controls multiple IDUs Fig.56 Two wired controllers control multiple IDUs...
- Page 46 Lennox VRF Unit No matter when unit is turned on or off, slave controller can be set. How to set a slave controller: hold “function” button on the designated controller for 5s, and temperature zone displays C00. Continue holding “function” button for 5s and setting screen of controller parameter will come out.
- Page 47 Lennox VRF Unit 4.7.4 Communication connection of central controlling units NOTICE! The centralized controller can be installed when it is necessary. Port connection G1 and G2 on the wiring board XT2 of master unit among each multi VRF system (see below)
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Page 48: External Electrical Wiring Diagram
Lennox VRF Unit 4.8 External Electrical Wiring Diagram Each unit should be equipped with a circuit breaker for short circuit protection and exceptional overload protection. Besides, a main circuit breaker shall be prepared for IDUs and ODUs in order to connect or disconnect power of the entire system. - Page 49 Lennox VRF Unit 4.8.2 External wiring diagram of modular connection Fig.60 NOTICE! Maximum number of ODU (N) and maximum number of IDU (n) are based upon the combination type of ODU. For details, please refer to the introduction of units’ combination.
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Page 50: Check Items After Installation And Trial Run
Lennox VRF Unit 5 Check Items after Installation and Test Run 5.1 Check Items after Installation Check Items Conditions Might Happen Check Has the unit been fixed firmly? The unit may drop, shake or emit noise. It may cause insufficient cooling/heating Have you done the gas leakage test? capacity. - Page 51 Lennox VRF Unit Check the valve: For single-module unit, fully open the gas and liquid valve and close oil balance valve; For dual/three module unit, fully open the gas, liquid valve and oil balance valve. 5.2.2 Test run 5.2.2.1 Notices Before test operation, make sure unit is power on and compressor has been preheated for more than 8 hours.
- Page 52 Lennox VRF Unit Description of each stage of Commissioning Cycle progress: Description of each stage of Commissioning Cycle progress Cycle Progress —— Status code code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status...
- Page 53 Lennox VRF Unit Description of each stage of Commissioning Cycle progress Cycle Progress —— Status code code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status No error in indoor components. light light light Start next step.
- Page 54 LED2 and LED3 display “OF”. 5.2.2.2 Commissioning Cycle operation mode LENNOX VRF system has two Commissioning Cycle modes: one is direct operation on main board of outdoor units while the other is PC operation via Commissioning software. In PC software Commissioning Cycle, indoor/ outdoor parameters can be displayed and historical data can be recorded and inquired.
- Page 55 Lennox VRF Unit button on the master module for at least 5s to enable Commissioning Cycle; Step 6: Wait. Unit will then start progress 01 and 02; in progress 01, if master unit is not correctly set, progress 01 will show the following errors:...
- Page 56 Lennox VRF Unit Step 8: in step 04, the quantity of IDUs needs to be confirmed manually. Main board of each module will display: Cycle code Progress code Status code LED1 LED2 LED3 Progress Display Display Display Code Code Code...
- Page 57 Lennox VRF Unit Cycle —— Progress code Status code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status 06_Detect No error is detected in outdoor outdoor Light Light Light components. Start next step. components If error is detected, system will stay at current step.
- Page 58 Lennox VRF Unit If more than 8 hours of preheat time is detected, system will display as below and start next step. Cycle —— Progress code Status code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code...
- Page 59 Lennox VRF Unit If master unit displays below, status judgments are enabled. Cycle —— Progress code Status code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status 10_Status check of Light Light Light Outdoor valves are open.
- Page 60 Lennox VRF Unit If it’s confirmed, press SW7 confirmation button. Unit will display as below and start next progress. Cycle —— Progress code Status code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status...
- Page 61 Lennox VRF Unit B If heating mode is selected, relevant display is as below: Cycle —— Progress code Status code code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status Test Run is enabled in heating...
- Page 62 Lennox VRF Unit 5.2.3 Appendix: judgment reference of normal operational parameters Reference of Commissioning Parameters of VRF System Debug item Parameter name Unit Reference Outdoor ambient temp —— ºC(°F) ● When system compressor starts up, temp of Discharge tube temp of ºC(°F)
- Page 63 Lennox VRF Unit Reference of Commissioning Parameters of VRF System Debug item Parameter name Unit Reference Normal bus voltage is 1.414 times of power voltage. For example, if 3-phase power voltage is 220V, then Inverter compressor 1 the bus voltage after rectification is: 220V X driven bus voltage 1.414=311V.
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Page 64: Common Malfunction And Troubleshooting
Otherwise, there will be collision malfunction of the project codes. For detail operation methods, please refer to the VRF Installation and Maintenance Manual. (2) If problem can not be solved after checking the above items, please contact Lennox VRF with model and serial numbers of equipment and detailed description of malfunction. - Page 65 Lennox VRF Unit Following circumstances are not malfunction: Description Reason When unit is started immediately after it is Overload protection switch makes it run just turned off after 3 minutes delay Unit doesn’t run When power is turned on Standby operating for about 1 minute...
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Page 66: Error Indication
Lennox VRF Unit 7 Error Indication Inquiry method of malfunction display: combine division number and content number to check the corresponding malfunction. Indoor: Error Code Content Error Code Content Malfunction of lower water Malfunction of IDU temperature sensor of water tank... - Page 67 Lennox VRF Unit Outdoor: Error Code Content Error Code Content Current sensor of compressor 2 is Malfunction of ODU abnormal Current sensor of compressor 3 is High-pressure protection abnormal Discharge low-temperature Current sensor of compressor 4 is protection abnormal Current sensor of compressor 5 is...
- Page 68 Lennox VRF Unit Error Code Content Error Code Content Current sensor of compressor 1 is Drive PFC protection of compressor abnormal Over-current protection of inverter Malfunction of temperature sensor of compressor oil-return 2 Drive IPM module protection of Malfunction of temperature sensor of...
- Page 69 Lennox VRF Unit Commissioning Cycle Error Codes: Error Code Content Error Code Content Preheat time of compressor is Alarm because ODU quantity is insufficient inconsistent Wrong setting of ODU’s capacity Abnormal communication of code/jumper cap converter Power supply phase sequence...
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Page 70: Maintenance And Care
After long period of shutdown, open the main power switch 8 hours before reoperating the unit so as to preheat the compressor crankcase. Check if the outdoor unit is installed firmly. If there is something abnormal, please contact the Lennox appointed service center. -
Page 71: Maintenance After Seasonal Use
Lennox. Warranty should meet the folowing requirements: First run of the unit should be operated by professional personnel from Lennox appointed service center. Only Lennox manufactured accessories can be used on the machine. - Page 72 For a complete list of the registered and common law trademarks owned by Lennox Industries Inc., please visit www.lennox.com NOTE - Due to Lennox’ ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability. Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.