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YMGI VRFO-72VP-U2C(55)5, Installation Instructions & User Manual

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YMGI VRFO-72VP-U2C(55)5 Installation Instructions & User Manual Download Page 13

YMGI 

•

 Your Modern Green Idea 

 

 

 13 

 

Product Introduction  

YMGI Multi VRF Modular System adopts inverter compressor technology. According to changes in the displacement of 
the compressor, stepless capacity regulation within range of 10%-100% can be realized. Various product configurations 
are provided with capacity range from 72kBtu/h to 360kBtu/h, which can be widely used in working area and especially 
applicable to the place with variable load change. YMGI air conditioners are your best choice. 

 

Names of Main Parts 

 

Fig.1 

No. 

1 

2 

3 

4 

5 

Name 

Fan, Motor 

Electric Box 

Assembly 

Valve interface 

Power cord 

through-hole 

Communication 

code through-hole 

 

Combinations of Outdoor Units

 

Model (Single) 

VRFO-144VP-U2C(55)5

 

VRFO-168VP-U2C(55)5

 

VRFO-192VP-U2C(55)5

 

Model  
(Combined)  

VRFO-72VP-U2C(55)5

 

+ VRFO-72VP-U2C(55)5

 

VRFO-72VP-U2C(55)5

 

+ VRFO-96VP-U2C(55)5

 

VRFO-96VP-U2C(55)5 

+ VRFO-96VP-U2C(55)5 

Model (Single) 

VRFO-216VP-U2C(55)5

 

VRFO-240VP-U2C(55)5

 

VRFO-264VP-U2C(55)5

 

Model  
(Combined)  

VRFO-96VP-U2C(55)5 

+ VRFO-120VP-U2C(55)5 

VRFO-120VP-U2C(55)5 

+ VRFO-120VP-U2C(55)5 

VRFO-72VP-U2C(55)5

 

+ VRFO-96VP-U2C(55)5 
+ VRFO-96VP-U2C(55)5 

Model (Single) 

VRFO-288VP-U2C(55)5

 

VRFO-312VP-U2C(55)5

 

VRFO-336VP-U2C(55)5

 

Model  
(Combined)  

VRFO-96VP-U2C(55)5 

+ VRFO-96VP-U2C(55)5 
+ VRFO-96VP-U2C(55)5 

VRFO-96VP-U2C(55)5 

+ VRFO-96VP-U2C(55)5 

+ VRFO-120VP-U2C(55)5 

VRFO-96VP-U2C(55)5 

+ VRFO-120VP-U2C(55)5 
+ VRFO-120VP-U2C(55)5 

Model (Single) 

VRFO-360VP-U2C(55)5 

 

Model  
(Combined)  

VRFO-120VP-U2C(55)5 

+ VRFO-120VP-U2C(55)5 
+ VRFO-120VP-U2C(55)5 

 

 

Summary of Contents for VRFO-72VP-U2C(55)5

Page 1: ...ate or Local Codes and all related documents manuals provided by YMGI Failure to follow and adhere to all codes and documentation can cause damage to equipment property or even personal injury Install...

Page 2: ...stallation Site 14 Installation Instructions 16 Dimensions of Outdoor Unit s 16 Piping Work Requirements 21 Connection Pipe 23 Allowable Pipe Length and Drop Height 25 Fitting Pipe between Outdoor Uni...

Page 3: ...MGI Group believes that responsible refrigerant practices are important to our customers the HVAC R industry and the environment All HVAC R technicians who handle refrigerants must be certified The Fe...

Page 4: ...r units if all indoor units must operate at their peak capacities all the time Otherwise the heating and cooling operation will be diminished and less efficient which could damage the units Any person...

Page 5: ...ensed personnel to install Reading and following YMGI Group recommendations and requirements contained in the following pages and other documents is the first step to help ensure a smooth installation...

Page 6: ...oil P trap in the copper suction line where the indoor unit is located 18 feet or more below the outdoor unit 3 Cross piping and or cross wiring of any units including more than one single zone or a...

Page 7: ...ines and wiring cable sets to keep from cross piping or cross wiring in multiple zone installations or where pipes for different single zone systems are close to one another Secure the wiring cables t...

Page 8: ...s as of original shipping date from YMGI Group whichever comes first This is a standard limited liability warranty and DOES NOT cover the following Any damage or repairs to properties or persons as an...

Page 9: ...gly 3 YMGI will ground ship the parts ASAP Expedited shipping is available at the customer s expense 4 Replacement parts that have an approved warranty registration are to be warrantied for the remain...

Page 10: ...YMGI Your Modern Green Idea 10...

Page 11: ...ermine if they are reputable Use only a reputable licensed certified HVAC installation professional to prevent any unexpected charges because of unethical business practices Check their references ver...

Page 12: ...set the indoor unit room temperature too low Keeping the temperature difference between indoor and outdoor unit within 41 5 YMGI Group recommends that only properly trained and authorized personnel b...

Page 13: ...hole Combinations of Outdoor Units Model Single VRFO 144VP U2C 55 5 VRFO 168VP U2C 55 5 VRFO 192VP U2C 55 5 Model Combined VRFO 72VP U2C 55 5 VRFO 72VP U2C 55 5 VRFO 72VP U2C 55 5 VRFO 96VP U2C 55 5 V...

Page 14: ...al capacity of indoor units should be within 50 135 of that of outdoor units 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...

Page 15: ...location where the floor is adequate and can withstand the weight of the unit and ensure the unit will not shake or fall off 2 Never expose the unit under direct sunshine and rainfall Install the uni...

Page 16: ...ern Green Idea 16 When the outdoor unit is totally surrounded by walls please refer to following figures for space dimension Space dimension for single module unit Fig 3 Space dimension for dual modul...

Page 17: ...ll 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 a...

Page 18: ...imension for multiple module unit To ensure good ventilation make sure there is no obstruction above the unit When the unit is located in a half open space front and left right side is open install th...

Page 19: ...YMGI Your Modern Green Idea 19 Fig 9 Considering the seasonal wind in outdoor unit installation Anti monsoon installation requirements for unit not connecting exhaust duct Fig 10 Fig 11...

Page 20: ...YMGI Your Modern Green Idea 20 Anti monsoon installation requirement for unit connecting exhaust duct Fig 12 Considering snow in outdoor unit installation Fig 13...

Page 21: ...l Thickness mm in Type 6 35mm 1 4 0 8mm 1 32 0 9 52mm 3 8 0 8mm 1 32 0 12 7mm 1 2 0 8mm 1 32 0 15 9mm 5 8 1 0mm 3 76 0 19 05mm 3 4 1 0mm 3 76 1 2H 22 2mm 7 8 1 2mm 1 21 1 2H 28 6mm 1 1 8 1 2mm 1 21 1...

Page 22: ...YMGI Your Modern Green Idea 22 Outline and Physical Dimension of VRFO 96VP U2C 55 5 and VRFO 120VP U2C 55 5 unit Fig 15...

Page 23: ...YMGI Your Modern Green Idea 23 Connection Pipes Fig 16...

Page 24: ...YMGI Your Modern Green Idea 24 Schematic Diagram of Piping Sequence VRFO 72VP U2C 55 5 Fig 17 VRFO 96VP U2C 55 5 and VRFO 120VP U2C 55 5 Fig 18...

Page 25: ...dopted to connect indoor and outdoor units Connecting method is shown in the figure below Remark Equivalent length of one Y type manifold is about 0 5 m 1 3 4ft Fig 19 L10 Length from the first branch...

Page 26: ...rst branch of IDU to the farthest IDU and the pipe length from the first branch of IDU to the nearest IDU L10 L11 40m 131 1 4ft When the outdoor unit is at upper side and height difference is more tha...

Page 27: ...r Modern Green Idea 27 Connection Pipe among Outdoor Modules Fig 20 Fig 21 When the distance between outdoor units exceeds 2m 6 1 2ft U type oil trap should be added at low pressure gas pipe A B 10m 3...

Page 28: ...or unit Fig 22 Basic Module Pipe between ODU and the first branch of IDU Gas Pipe mm in Liquid Pipe mm in VRFO 72VP U2C 55 5 19 05 3 4 9 52 3 8 VRFO 96VP U2C 55 5 22 2 7 8 9 52 3 8 VRFO 120VP U2C 55 5...

Page 29: ...apacity C kBtu h Model Select the branch of outdoor module 144 C ML01 A Fitting pipe between two manifolds from basic modules Pipe size between two manifolds from basic modules is based on the total c...

Page 30: ...Fig 25 Basic Module Pipe between ODU and the first branch of IDU Gas Pipe mm in Liquid Pipe mm in VRFO 72VP U2C 55 5 19 05 3 4 9 52 3 8 VRFO 96VP U2C 55 5 22 2 7 8 9 52 3 8 VRFO 120VP U2C 55 5 28 6 1...

Page 31: ...8 15 9 5 8 VRFO 264VP U2C 55 5 34 9 1 3 8 19 05 3 4 VRFO 288VP U2C 55 5 34 9 1 3 8 19 05 3 4 VRFO 312VP U2C 55 5 34 9 1 3 8 19 05 3 4 VRFO 336VP U2C 55 5 34 9 1 3 8 19 05 3 4 VRFO 360VP U2C 55 5 41 3...

Page 32: ...eam indoor unit s C Btu h Dimension of the pipe of indoor branch Gas Pipe mm in Liquid Pipe mm in C 17100 12 7 1 2 12 7 1 2 17100 C 48500 15 9 5 8 15 9 5 8 48500 C 72000 19 05 3 4 19 05 3 4 72000 C 96...

Page 33: ...tched with fitting pipe of indoor unit Fig 29 Rated capacity of indoor unit C Btu h Pipe between indoor branch and IDU Gas Pipe mm in Liquid Pipe mm in C 7500 9 52 3 8 6 35 1 4 7500 C 17100 12 7 1 2 6...

Page 34: ...t the same position 4 Please use a torque wrench to connect union nut on the indoor unit See Fig 30 Fig 30 1 Align the expansion end of copper pipe with the center of threaded joint Tighten the flare...

Page 35: ...ery 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 T...

Page 36: ...above 3 Joints at indoor and outdoor units should be wrapped with insulating material and leave no clearance between pipe and wall See Fig 35 Fig 35 4 Manifold attached foam cannot be taken as insulat...

Page 37: ...refrigerant should be charged Total refrigerant charging amount R Pipeline charging amount A charging amount B of every module 1 Pipeline charging amount Added refrigerant quantity A for piping Liqui...

Page 38: ...rigerant charging amount of every 1m or 1in liquid pipe 25kg 55 1 pounds Total refrigerant charging amount R 25 12 37kg 55 1 26 4 81 5pounds Example 2 Outdoor unit is a 72kBtu h module and the indoor...

Page 39: ...rical work should be performed by professional personnel as per local laws regulations and this manual 6 Connect the unit to the special grounding device and make sure the unit is grounded properly 7...

Page 40: ...core cable must be used 4 The above sectional area is suitable for a maximum distance of 15m 49 1 5ft If it s over 15m 49 1 5ft sectional area must be expanded to prevent overload current from burning...

Page 41: ...ith the cross through rubber ring on the opening Then lead the cable through the opening Connect L1 L2 L3 of power cord and ground wire separately to the positions on wiring board for power supply tha...

Page 42: ...mong outdoor basic modules 2 Communication between ODU and IDU 3 Communication among IDUs 4 Communication between IDU and wired controller 5 Connection between IDU and light board receiver 6 Communica...

Page 43: ...Remarks Light Ordinary polyvinyl chloride sheathed cord L 250 820 1 5 2 AWG18 2 AWG16 1 Total length of communication line can t exceed 250m 820 1 5ft 2 The cord should be Circular cord the cores sha...

Page 44: ...44 Fig 42 All of the selected communication wire must be consistent with local laws and regulations Connection mode of communication 1 All communication wires of VRF must be connected in series rather...

Page 45: ...ng technology is adopted for VRF IDU and ODU No need to set address codes manually Only the addresses of the master unit and central control need to be set address of central control is only needed wh...

Page 46: ...System Communication Communication connection between IDU and ODU The centralized controller can be installed when it is necessary Connect IDU and ODU via terminal D1 D2 of wiring board XT2 Below are...

Page 47: ...tdoor main board 2 For modular outdoor 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...

Page 48: ...between IDU and wired controller There are 4 kinds of connection between IDU and wired controller as shown below Fig 49 One wired controller controls one IDU Fig 50 Two wired controllers controls one...

Page 49: ...button to switch to setup of parameter values The parameter value will blink Press button or button to select code 02 And then press confirm cancel to finish setting Press confirm cancel to return to...

Page 50: ...I Your Modern Green Idea 50 Fig 53 1 Wired controller and light board remote receiver can be used at the same time 2 When light board remote receiver is used please use remote controller at the same t...

Page 51: ...Communication connection of central controlling units 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 mult...

Page 52: ...n general circuit breaker is at OFF status 2 During operation all indoor units and outdoor units belonging to the same system must be kept energized status Otherwise the unit can t operate normally Ex...

Page 53: ...Idea 53 External wiring diagram of modular connection Fig 56 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 introductio...

Page 54: ...as the communication line been connected correctly The unit cannot run normally Communication malfunction might happen Is the piping connection and valve status correct The unit cannot run normally Is...

Page 55: ...will operate according to the ambient temperature a When outdoor temperature is above 20 C 68 F debugging shall be in cooling mode b When outdoor temperature is below 20 C 68 F debugging shall be in...

Page 56: ...tween master unit and inverter compressor db light 05 light C3 light System detects driven communication error between master unit and inverter fan db light 05 light CH light IDU ODU high proportion o...

Page 57: ...ng mode db light 15 light U9 light Outdoor pipeline and valves are not normal db light 15 light XXXX U8 light System detects error in indoor pipeline XXXX is the project no of the faulted IDU 3s later...

Page 58: ...odule for at least 5s to enable debugging 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 Debugging Co...

Page 59: ...aster unit to confirm it Unit will start next progress Debugging Code Progress Code Status Code Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 04_Confirm the quant...

Page 60: ...thods of above error can be found in Troubleshooting Step11 progress 07 is Detect indoor components If no error is detected system will display as below and then start next progress Debugging Code Pro...

Page 61: ...ight Preheat time for compressor is less than 8h Step 13 progress 09 is Refrigerant judgments before startup If the refrigerant quantity inside the system meets the requirement of operation startup sy...

Page 62: ...press SW6 return button to restart the judgments If unit detects that valve status is normal it will display as below and start next progress Debugging Code Progress Code Status Code Meaning Progress...

Page 63: ...ng debugging in cooling mode db Light 15 Light U9 Light Outdoor pipeline and valves are not normal db Light 15 Light XXXX U8 Light System detects error in indoor pipeline XXXX is the project no of the...

Page 64: ...Code Display status Code Display status Code Display status Debugging finished 01 04 Light OF Light OF Light Debugging is finished System is on standby condition LED1 displays module address LED2 and...

Page 65: ...0 F system s high pressure value in heating mode is 40 52 C 104 125 6 F 8 System low pressure C F When ambient temp is 25 35 C 77 95 F system s low pressure value in cooling mode is 0 8 C 32 46 4 F Wh...

Page 66: ...tube temp will be 1 7 C 33 8 44 6 F lower than outlet tube temp For a same IDU under heating mode inlet tube temp will be 10 20 C 50 68 F lower than outlet tube temp 24 Outlet tube temp of indoor heat...

Page 67: ...is restarted immediately after it is turned off Overload protection switch lets it run after 3 minutes delay When power is turned on Standby operating for about 1 minute Mist comes from the unit In c...

Page 68: ...lfunction of ODU FC Current sensor of compressor 2 is abnormal E1 High pressure protection FL Current sensor of compressor 3 is abnormal E2 Discharge low temperature protection FE Current sensor of co...

Page 69: ...e protection for DC bus bar of drive of compressor H6 Drive IPM module protection of fan PE Phase lacking of inverter compressor H7 Malfunction of drive temperature sensor of fan PF Malfunction of cha...

Page 70: ...low distribution of IP address C2 Communication malfunction between main control and inverter compressor driver Cd Communication malfunction between mode exchanger and ODU C3 Communication malfunction...

Page 71: ...6 Check if the outdoor unit is installed firmly If there is something abnormal please contact the YMGI appointed service center Maintenance after Seasonal Use 1 Cut off main power supply of the unit...

Page 72: ...Idea 72 USER NOTES AND INSTALLATION SERVICE MAINTENANCE NOTES INSTALLATION NOTES Please list any questions or issues you may have with this unit No Date Notes Asked Your Technician for Help Did You A...

Page 73: ...n Green Idea 73 USER NOTES Please list any questions or issues you may have with this unit No Date Company Name Technician Name Phone HVAC License Job Not Performed by Technician Technician Checklist...

Page 74: ...odern Green Idea 74 SERVICE MAINTENANCE NOTES Please list any questions or issues you may have with this unit No Date Contents of Service Maintenance Technician s Company Name Technician Name Phone HV...

Page 75: ...YMGI Your Modern Green Idea 75...

Page 76: ...2 SEER 09 36K Btu h 58 4 78 1 Single Zone 18 23 SEER 09 36K Btu h Symphony CHOIR DC Inverter 59 2 DC Inverter Multiple Zone 16 SEER 2x09K to 5x12K Btu h 59 2S DC Inverter Multiple Zone 16 SEER 6x09K t...

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