Lennox VEP Series Installation & Operation Instructions Download Page 7

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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

VEP306N432K

VEP330N432K

VEP342N432K

VEP360N432K

VEP381N432K

VEP402N432K

VEP420N432K

VEP438N432K

VEP456N432K

VEP480N432K

VEP498N432K

VEP516N432K

VEP540N432K

VEP552N432K

VEP570N432K

VEP591N432K

VEP612N432K

VEP630N432K

VEP648N432K

VEP669N432K

VEP690N432K

VEP708N432K

VEP726N432K

VEP750N432K

VEP762N432K

VEP780N432K

VEP801N432K

VEP822N432K

VEP840N432K

The total capacity of indoor units should be within 50%~135% of that of outdoor units.

Lennox

VRF Unit

Summary of Contents for VEP Series

Page 1: ...Certification Status N ETL 220V and 460V Refrigerant Type 4 R 410A Voltage K 220V 3Ph 50 60Hz G 460V 3Ph 60Hz N 380 415V 3Ph 50 60Hz Future Use Internal Use Only 32 Internal Use Nominal Cooling Capaci...

Page 2: ...ct inspection and operational test before leaving the factory In order to avoid damage due to improper disassembly and inspection which may impact the normal operation of unit please do not disassembl...

Page 3: ...2 Connection Pipe 15 4 3 Installation of the Connection Pipe 26 4 4 Air Purging and Refrigerant Charge 31 4 5 Electric Wiring 34 4 6 System Communication 37 4 7 Connection Method and Steps for System...

Page 4: ...turn of the compressor 12 Do not allow children operate this unit 13 Do not operate this unit with wet hands 14 Turn off the unit or cut off the power supply before cleaning the unit otherwise electri...

Page 5: ...going the unit might be damaged and lead to electric shock or fire Lennox will not assume responsibility of personal injury or equipment damage caused by improper installation and commission unnecess...

Page 6: ...Model Combined VEP120N432K VEP210N432K VEP210N432K VEP132N432K VEP210N432K VEP210N432K VEP150N432K VEP210N432K VEP210N432K VEP171N432K VEP210N432K VEP210N432K Model Single VEP612N432K VEP630N432K VEP...

Page 7: ...P306N432K 53 VEP330N432K 56 VEP342N432K 59 VEP360N432K 63 VEP381N432K 64 VEP402N432K 64 VEP420N432K 64 VEP438N432K 64 VEP456N432K 64 VEP480N432K 66 VEP498N432K 69 VEP516N432K 71 VEP540N432K 74 VEP552N...

Page 8: ...when all IDUs stop ODU will also stop 2 4 The Range of Production Working Temperature Cooling Heating When the indoor units are all VRF fresh air processor the unit operating range is as follows Cool...

Page 9: ...1 Install the unit at a place where is adequate to withstand the weight of the unit and make sure the unit would not shake or fall off 2 Never expose the unit under direct sunshine and rainfall Instal...

Page 10: ...t 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...

Page 11: ...8 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 Lennox VRF Unit...

Page 12: ...mm 59in or above See Fig 7 When space is limited within 1500mm 59in or the unit is not set in an open space air return pipe is required to be installed in order to keep good ventilation See Fig 8 Unit...

Page 13: ...10 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 Lennox VRF Unit...

Page 14: ...ing work requirements R410A Refrigerant System Outer Diameter mm in Wall Thickness mm in Type 6 35 1 4 0 8 1 32 O 9 52 3 8 0 8 1 32 O 12 70 1 2 0 8 1 32 O 15 9 5 8 1 0 3 76 O 19 05 3 4 1 0 3 76 1 2H 2...

Page 15: ...12 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 Lennox VRF Unit...

Page 16: ...13 Outline and Physical Dimention of VEP120N432K VEP132N432K and VEP150N432K unit Unit mm in Fig 16 Lennox VRF Unit...

Page 17: ...14 Outline and Physical Dimention of VEP171N432K VEP192N432K and VEP210N432K unit Unit mm in Fig 17 Lennox VRF Unit...

Page 18: ...15 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 Lennox VRF Unit...

Page 19: ...32K 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: ...j Equivalent length 190 623 1 4 Difference between the pipe length from the first branch of IDU to the farthest IDU and the pipe length from the first branch of IDU to the nearest IDU 40 131 1 4 L10...

Page 21: ...No need to enlarge pipe size VEP096N432K No need to enlarge pipe size 12 7 1 2 VEP120N432K 28 6 1 1 8 15 9 5 8 VEP132N432K 28 6 1 1 8 15 9 5 8 VEP150N432K 31 8 1 1 4 15 9 5 8 VEP171N432K 31 8 1 1 4 1...

Page 22: ...4 1 VEP822N432K 51 4 2 25 4 1 VEP840N432K 51 4 2 25 4 1 If the length between an IDU and its nearest branch is above 10m 32 4 5ft then increase the size of the liquid pipe of IDU only for the pipe si...

Page 23: ...st branch of IDU Gas Pipe mm in Liquid Pipe mm in VEP075N432K 19 05 3 4 9 52 3 8 VEP096N432K 22 2 7 8 9 52 3 8 VEP120N432K 25 4 1 12 7 1 2 VEP132N432K 25 4 1 12 7 1 2 VEP150N432K 28 6 1 1 8 12 7 1 2 V...

Page 24: ...anifolds from basic modules Pipe size between two manifolds from basic modules is based on the total capacity of upstream modules Fig 27 Total capacity of upstream modules Q kW Btu h Pipe size between...

Page 25: ...m in Liquid Pipe mm in VEP075N432K 19 05 3 4 9 52 3 8 VEP096N432K 22 2 7 8 9 52 3 8 VEP120N432K 25 4 1 12 7 1 2 VEP132N432K 25 4 1 12 7 1 2 VEP150N432K 28 6 1 1 8 12 7 1 2 VEP171N432K 28 6 1 1 8 15 9...

Page 26: ...8 1 1 1 2 19 05 3 4 VEP456N432K 38 1 1 1 2 19 05 3 4 VEP480N432K 41 3 1 5 8 19 05 3 4 VEP498N432K 41 3 1 5 8 19 05 3 4 VEP516N432K 41 3 1 5 8 19 05 3 4 VEP540N432K 41 3 1 5 8 19 05 3 4 VEP552N432K 41...

Page 27: ...30 a Fig 30 b R410A Refrigerant System Total capacity of downstream indoor unit s kW Btu Model Y type Manifold C 20 0 68000 VEBC01A 20 0 68000 C 30 0 102000 VEBC01B 30 0 102000 C 70 0 238000 VEBC02A...

Page 28: ...9 52 3 8 14 2 48000 C 22 4 76000 19 05 3 4 9 52 3 8 22 4 76000 C 28 0 96000 22 2 7 8 9 52 3 8 28 0 96000 C 40 0 136000 25 4 1 12 7 1 2 40 0 136000 C 45 0 150000 28 6 1 1 8 12 7 1 2 45 0 150000 C 68 0...

Page 29: ...or unit Please strictly conform to the requirements for welding process Rosin joints and pin holes are not allowable 3 When laying the pipes be careful not to deform them The radius of bending parts s...

Page 30: ...with various copper pipe Use pipe cutter to cut in the middle of the pipe section with different pipe size and deburr as well See Fig 35 Cut from the center Fig 35 3 Y type manifold can be installed...

Page 31: ...very copper pipe should be labeled so as to avoid misconnection 2 Manifolds can be laid in the following ways The length of a straight pipe between two manifolds cannot be less than 500 mm 19 11 16in...

Page 32: ...inlet manifold from the welding point Fixing point 2 200mm 7 7 8in on the main branched pipe from the welding point Fixing point 3 250mm 9 5 6in on the branched pipe from the welding point Unit mm in...

Page 33: ...air 2 For heat pump unit liquid pipe should bear 70 or above and gas pipe should bear 120 or above For cooling only unit both liquid pipe and gas pipe should bear 70 or above Example Polyethylene foam...

Page 34: ...rging 1 Confirm outdoor liquid and gas valves are closed Air puring from the nozzel located on liquid and gas valves by vacuum pump See Fig 41 2 When there are more than 2 outdoor units air purging fr...

Page 35: ...m of rated cooling capacity of outdoor unit If all of the indoor units are fresh air indoor units the quantity of refrigerant added to each module is 0kg If outdoor air processor is connected with nor...

Page 36: ...nt which is nonflammable and nontoxic However the space for refrigerant leakage must be sufficient to ensure that the refrigerant concentration does not exceed that specified in the safety requirement...

Page 37: ...The damaged power cord and connecting wire should be replaced by exclusive cable 5 All the electrical work should be performed by professional personnel as per local law regulation and this manual 6...

Page 38: ...0 43 113 60 150 VEP342N432K 208V 230V 3 60Hz 80 150 60 113 80 150 VEP360N432K 208V 230V 3 60Hz 90 150 65 113 90 150 VEP381N432K 208V 230V 3 60Hz 110 150 89 113 110 150 VEP402N432K 208V 230V 3 60Hz 125...

Page 39: ...rical appliances they must be reliably grounded 3 Ground resistance must be in accord with requirements of local standard 4 The green yellow wire within units are ground wire Do not use it for other p...

Page 40: ...ferent refrigeration systems 7 Graphics of general communication connection Fig 44 4 6 2 Communication mode CAN bus mode is taken for communication between IDU and ODU and communication among IDUs 4 6...

Page 41: ...ic of connection between IDU and wired controller Fig 45 2 Select communication wire between ODU and IDU Material Type Total Length L m of Communication Cable between IDU Unit and IDU ODU Unit m ft Wi...

Page 42: ...39 Fig 47 Fig 48 Fig 49 Lennox VRF Unit...

Page 43: ...trol is only needed when there are multiple refrigeration systems NOTICE When installing remote monitor or central controller displacement on indoor units project codes must be made Otherwise there wi...

Page 44: ...utdoor units if there are multiple outdoor modules then indoor units must be connected with the last slave module of ODU slave module is set by SA8 of the outdoor main board 3 Communication wire and p...

Page 45: ...ontroller controls multiple IDUs Fig 56 Two wired controllers control multiple IDUs When two wired controllers control multiple IDUs the wired controller can be connected to any one IDU provided that...

Page 46: ...Parameter code Parameter name Parameter scope Default value Remark P13 Set up address for wired controller 01 master wired controller 02 slave wired controller 01 When 2 wired controllers control one...

Page 47: ...ion 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 se...

Page 48: ...circuit breaker shall be prepared for IDUs and ODUs in order to connect or disconnect power of the entire system 4 8 1 External wiring diagram of a single unit Fig 59 NOTICE Maximum number of IDU is b...

Page 49: ...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 Power supply for the unit sh...

Page 50: ...un normally Communication malfunction might happen Has the communication line been connected correct The unit can not run normally Communication malfunction might happen Is the piping connection and v...

Page 51: ...nder the guide of professional technicians Fig 61 2 When Commissioning Cycle starts system will operate according to the ambient temperature 1 When outdoor temperature is above 20 C 68 F Commissioning...

Page 52: ...has confirmed the quantity of modules Start next step 04_Confirm the quantity of IDU s db light 04 light 01 8 0 blink LED3 displays the quantity of IDUs Confirm the number manually db light 04 light...

Page 53: ...open db light 10 light U6 light Outdoor valves are closed or not fully open db light 10 light OC light Outdoor valves open Start next step 11_Calculate refrigerant quantity manually db light 11 light...

Page 54: ...tandby condition LED1 displays module address 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 bo...

Page 55: ...y mode Current status Display mode db light 02 light L7 blink At this time all buttons are ineffective Set master IDU in 1min via Commissioning software If master IDU is not set in 1min system will se...

Page 56: ...Meaning progress LED1 LED2 LED3 Code Display status code Display status Code Display status 05_Check ODU internal communication db Light 05 Light OC Light Detection is finished Start next step If erro...

Page 57: ...as below and then start next step Cycle code Progress code Status code Meaning progress LED1 LED2 LED3 Code Display status code Display status Code Display status 07_Detect indoor components db Light...

Page 58: ...13 step 09 is Refrigerant judgments before startup If the refrigerant quantity inside the system meets the requirement of operation startup system will display as below and start next progress Cycle...

Page 59: ...ts If unit detects that valve status is normal it will display as below and start next step Cycle code Progress code Status code Meaning progress LED1 LED2 LED3 Code Display status code Display status...

Page 60: ...e Progress code Status code Meaning progress LED1 LED2 LED3 Code Display status code Display status Code Display status 15_Cooling Test Run db Light 15 Light AC Light Test Run is enabled in cooling mo...

Page 61: ...o 100 has U8 error then LED3 displays like this 01 2s later 00 2s later U8 and repeat again Step 18 if there s no error during operation for about 40 60 min system will automatically confirm that Comm...

Page 62: ...high pressure C F System s normal high pressure value is within 20 25 C 68 77 F According to the change in ambient temp and system operational capacity system s high pressure value is 10 40 C 50 104 F...

Page 63: ...om the calculated voltage 18 System parameters ODU Operating freq of fan motor 1 Hz Adjusts in 0 65Hz according to system pressure 19 Current of fan motor 1 A 20 Operating freq of fan motor 2 Hz Adjus...

Page 64: ...wireless remote controller or wired controller Fan speed is set too low Adjust setting at wireless remote controller or wired controller Wind direction is not correct Adjust setting at wireless remot...

Page 65: ...unit is operating and after operating That s sound caused by expansion of panel and other parts due to temperature change The unit blows out duct When unit runs after no operation for a long period D...

Page 66: ...IDU is inconsistent dH PCB of wired controller is abnormal LA For single control over multiple units IDU series is inconsistent dC Setting capacity of DIP switch code is abnormal LH Alarm due to bad...

Page 67: ...sor 6 b2 Malfunction of defrosting temperature sensor 1 J7 Gas mixing protection of 4 way valve b3 Malfunction of defrosting temperature sensor 2 J8 High pressure ratio protection of system b4 Malfunc...

Page 68: ...inverter fan PE Phase lacking of inverter compressor H6 Drive IPM module protection of fan PF Malfunction of charging loop of driven of compressor H7 Malfunction of drive temperature sensor of fan PJ...

Page 69: ...ger and IDU UL Emergency operation DIP switch code of compressor is wrong CF Malfunction of multiple main control units UE Charging of refrigerant is invalid CJ Address DIP switch code of system is sh...

Page 70: ...d lock status nn Length modification of connection pipe of ODU 8 Maintenance and Care Regular check Maintenance and care should be performed every six months by professional personnel which will prolo...

Page 71: ...ion circuit In case of hazard it s better to use nitrogen or refrigerant to accomplish such test 9 After sales Service In case the air conditioning unit you bought has any quality problem or you have...

Page 72: ...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 installati...

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