Table of Contents
Advertisement
Quick Links
INSTALLATION INSTRUCTIONS & USER'S MANUAL
DC Inverter Multi Variable Refrigerant Flow (VRF) System
8, 10 & 12 Ton Top Discharge Outdoor Unit
For Model Numbers:
VRFO-72VP-U2C(55)5
VRFO-96VP-U2C(55)5
VRFO-120VP-U2C(55)5
Thank you for choosing this YMGI product. Please read the user's manual carefully before installation/operation and retain for your
records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to
download a current electronic version.
This product is designed and manufactured to be free from any defects in material and workmanship during normal use and
maintenance. Installation, operation, maintenance and repairs must follow all standards and professional practices for regular
cooling and heating equipment, such as NEC, State, 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.
Installer: Must be currently licensed/certified HVAC technicians only. Must Read the manual and all provided documents prior
to installation. Complete and fill out all required information on the Warranty Registration Card.
User: Retain this manual and all supplied documents for your records and future reference.
Servicer: Use this manual for information concerning servicing and maintenance of this product.
Only qualified technicians should install and service this equipment. The installation, startup, operation and servicing of this
equipment can be hazardous and requires a HVAC professional who has been trained, licensed and certified. Installations,
adjustments or any equipment alterations done by an unqualified person could result in serious injury and even death. When
working on the equipment, observe all precautions in the provided documents, on the tags, stickers, and labels that are attached
to or placed on the equipment.
YMGI: Engineered Comfort Products for An Efficient
and Sustainable Green World!
VRF Heat Pump Ultra Heating
NOTICE
SAFETY WARNING
YMGI • Your Modern Green Idea
1
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Summary of Contents for YMGI VRFO-72VP-U2C(55)5
- Page 1 VRFO-96VP-U2C(55)5 VRFO-120VP-U2C(55)5 Thank you for choosing this YMGI product. Please read the user’s manual carefully before installation/operation and retain for your records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download a current electronic version.
-
Page 2: Table Of Contents
Limited Product Warranty ........................8 Limited Product Warranty Registration Card ................... 10 Why Does YMGI Group Require Installation and Service to Be Performed 100% by Currently Licensed or Certified HVAC Technicians/Contractors ..........11 Suggestions to Aid You in Hiring an HVAC Contractor ................11 Safety Precautions ........................... -
Page 3: Introduction
Chlorine, Fluorine and Carbon (HCFCs), may affect the ozone layer. Not all refrigerants have the same potential impact on the environment. YMGI Group advocates for the responsible handling of all refrigerants including industry replacements for CFCs such as HCFCs and HFCs. - Page 4 Copyright This document and the information contained therein are the sole property of YMGI Group and shall not be used or reproduced in whole or in part, without the written permission of YMGI Group. YMGI Group reserves the right to revise this manual at any time and to make changes to its content without obligation to notify anyone about any modifications, revisions or changes.
-
Page 5: Note From Ymgi - Must Read
YMGI Group is the MEDIA AUTHORITY: YMGI Group, located in O'Fallon, MO 63366 is the author of all media produced for its products and is the only party able to give any additional explanation for any data, definitions and or descriptions found within any of its media, including but not limited to YMGI product brochures, manuals, pamphlets, catalogs, and videos. - Page 6 With the information provided above, you will know some things to look for and questions you can ask. If at any time you feel there may be an issue with the installation, please have your technician contact YMGI at (866)833-3138 x 703 with any questions, issues or concerns you may have.
-
Page 7: Installing Technician/Contractor's Responsibilities
Make sure you have all the materials you need to properly, completely and correctly finish the installation. The YMGI units and accessories may be just a portion of what you will need for the project. When support issues arise, remember YMGI employees and YMGI distributors/sales, dealers and agents are not installers and may only provide suggestions. -
Page 8: Limited Product Warranty
Compressor: YMGI will warrant the compressor of a YMGI-validated and approved warranty filing, for a period of 10 years from the date of successful installation at its original installation location. Parts: YMGI will warrant parts of a YMGI-validated and approved warranty filing, for 5 years from the date of successful installation at original installation location. - Page 9 YMGI Technical support the exact part(s) needed to fix the problem(s). YMGI will check the customer's warranty filing. There will be no charge for Parts with a validated and approved warranty. Any Parts needed for warranties that have not been validated and approved or have an invalid warranty filing (resulting in an unapproved warranty request), will be charged accordingly.
-
Page 10: Limited Product Warranty Registration Card
YMGI • Your Modern Green Idea... -
Page 11: Why Does Ymgi Group Require Installation And Service To Be Performed 100% By Currently Licensed Or Certified Hvac Technicians/Contractors
Some contractors/technicians may not feel comfortable installing equipment that has been purchased by someone other than themselves. You can contact YMGI directly to check and see if there are contractors in your area who have installed our products or any similar products. -
Page 12: Safety Precautions
YMGI Group recommends that only properly trained and authorized personnel be allowed to repair or service the unit. Improper repairs or servicing can result in electric shock or fire hazards. Please contact YMGI Group if you need help locating a qualified repair or service technician. -
Page 13: Product Information
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. - Page 14 The Range of Production Working Temperature Cooling Ambient temperature: -5ºC(23ºF)~52ºC(125.6ºF) Heating Ambient temperature: -20ºC (-4ºF)~24ºC (75.2ºF) Running this system outside of the working temperature range may damage the unit and will invalidate the warranty. YMGI • Your Modern Green Idea...
-
Page 15: Preparation Before Installation
Preparation before Installation The picture is only used for reference and the actual product prevails. Unit: mm (in.). Standard Parts Please use the following standard parts supplied by YMGI. Number Name Picture Remarks Owner's Manual Wiring (match with resistance) Must be connected to the last... -
Page 16: Installation Instructions
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-module unit Fig.4 YMGI • Your Modern Green Idea... - Page 17 1500mm (59in.) or above (See Fig.6). 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.7). YMGI • Your Modern Green Idea...
- Page 18 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 the unit as per the same or opposite direction. Fig.8 YMGI • Your Modern Green Idea...
- Page 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 YMGI • Your Modern Green Idea...
- Page 20 Anti-monsoon installation requirement for unit connecting exhaust duct Fig. 12 Considering snow in outdoor unit installation Fig. 13 YMGI • Your Modern Green Idea...
-
Page 21: Piping Work Requirements
Φ28.6mm (1-1/8”) ≥1.2mm (1/21”) 1/2H Φ34.9mm (1-3/8”) ≥1.3mm (2/39”) 1/2H Φ41.3mm (1-5/8”) ≥1.5mm (1/17”) 1/2H Installation Instructions Physical Dimension of the Outdoor Unit and Mounting Hole Outline and Physical Dimensions of VRFO-72VP-U2C(55)5. Fig. 14 YMGI • Your Modern Green Idea... - Page 22 Outline and Physical Dimension of VRFO-96VP-U2C(55)5 and VRFO-120VP-U2C(55)5 unit. Fig. 15 YMGI • Your Modern Green Idea...
-
Page 23: Connection Pipe
Connection Pipes Fig. 16 YMGI • Your Modern Green Idea... - Page 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 YMGI • Your Modern Green Idea...
-
Page 25: Allowable Pipe Length And Drop Height
Remark: Equivalent length of one Y-type manifold is about 0.5 m (1-3/4ft.). Fig. 19 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.). YMGI • Your Modern Green Idea... - Page 26 No need to enlarge pipe size 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 size that is≤6.35mm (1/4in.). YMGI • Your Modern Green Idea...
- Page 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 (32-7/8ft.). YMGI • Your Modern Green Idea...
-
Page 28: Fitting Pipe Between Outdoor Unit And Manifolds
VRFO-96VP-U2C(55)5 Φ28.6(1-1/8) Φ12.7(1/2) VRFO-120VP-U2C(55)5 For multi-module unit, select appropriate manifold connected to outdoor module as per the pipe size of basic module. Pipe size of basic outdoor module is shown as follows: Fig. 23 YMGI • Your Modern Green Idea... - Page 29 Fig. 24 Total capacity of upstream modules Pipe size between manifolds Q(Btu/h) Gas pipe size mm(in.) Liquid pipe size mm(in.) Φ28.6(1-1/8) Φ12.7(1/2) 144000 Φ28.6(1-1/8) Φ15.9(5/8) 168000 Φ28.6(1-1/8) Φ15.9(5/8) 192000 Φ28.6(1-1/8) Φ15.9(5/8) 216000 Ф34.9(1-3/8) Φ15.9(5/8) 240000 YMGI • Your Modern Green Idea...
- Page 30 Φ19.05(3/4) Φ9.52(3/8) VRFO-72VP-U2C(55)5 Φ22.2(7/8) Φ9.52(3/8) VRFO-96VP-U2C(55)5 Φ28.6(1-1/8) Φ12.7(1/2) VRFO-120VP-U2C(55)5 For multiple modules, the piping from ODU to the first branch of IDU is based on the total rated capacity of outdoor modules. Fig. 26 YMGI • Your Modern Green Idea...
- Page 31 Manifold at indoor unit side can be selected as per total capacity of downstream indoor unit(s). Refer to the following table. Fig. 27 Total capacity of downstream R410A Refrigerant System Model indoor unit(s) C (KBtu/h) Y-type Manifold C＜68 VRFO-YtubeP-1AA 68≤C≤102 VRFO-YtubeP-1BA 102＜C≤239 VRFO-YtubeP-02A 239＜C VRFO-YtubeP-03A YMGI • Your Modern Green Idea...
- Page 32 C(Btu/h) Gas Pipe mm(in.) Liquid Pipe mm(in.) C≤17100 Φ12.7(1/2) Φ12.7(1/2) Φ15.9(5/8) Φ15.9(5/8) 17100＜C≤48500 Φ19.05(3/4) Φ19.05(3/4) 48500＜C≤72000 Φ22.2(7/8) Φ22.2(7/8) 72000＜C≤96000 Φ28.6(1-1/8) Φ28.6(1-1/8) 96000＜C≤144000 Φ28.6(1-1/8) Φ28.6(1-1/8) 144000＜C≤216000 Φ34.9(1-3/8) Φ34.9(1-3/8) 216000＜C≤240000 Φ34.9(1-3/8) Φ34.9(1-3/8) 240000＜C≤336000 Φ41.3(1-5/8) Φ41.3(1-5/8) 336000＜C YMGI • Your Modern Green Idea...
- Page 33 Fig. 29 Pipe between indoor branch and IDU Rated capacity of indoor unit C(Btu/h) Gas Pipe mm(in.) Liquid Pipe mm(in.) C≤7500 Φ9.52(3/8) Φ6.35(1/4) Φ12.7(1/2) Φ6.35(1/4) 7500＜C≤17100 Φ15.9(5/8) Φ9.52(3/8) 17100＜C≤48500 Φ19.05(3/4) Φ9.52(3/8) 48500＜C≤72000 Φ22.2(7/8) Φ9.52(3/8) 72000＜C YMGI • Your Modern Green Idea...
-
Page 34: Installation Of Connection Pipe
2. Y-type manifold has several 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. See Fig.32. YMGI • Your Modern Green Idea... - Page 35 3. There must be three fixing point for both horizontal and vertical installation of the Y-type manifold. See Fig.34. Fixing point 1: 100 mm on the main inlet manifold from the welding point Fixing point 2: 200 mm on the main branched pipe from the welding point YMGI • Your Modern Green Idea...
- Page 36 Support should be made for hanging connection pipe. Distance between each support cannot be over 1m (39- 3/8in.). Protection against accidental damage should be made for outdoor pipeline. When the pipeline exceeds 1m (39- 3/8in.), a pin. board should be added for protection. YMGI • Your Modern Green Idea...
-
Page 37: Air Purging And Refrigerant Charge
C N＜4 50%≤C≤90% N≥4 0.5(1.1) 0.5(1.1) 0.5(1.1) N＜4 1(2.2) 1(2.2) 1.5(3.3) 90%＜C≤105% 8＞N≥4 2(4.4) 2(4.4) 3(6.6) N≥8 4(8.8) 3.5(7.7) 4(8.8) N＜4 2(4.4) 2(4.4) 2.5(5.5) 105%＜C≤135% 8＞N≥4 4(8.8) 3.5(7.7) 4(8.8) N≥8 4.5(9.9) 4.5(9.9) 5(11.0) YMGI • Your Modern Green Idea... - Page 38 If required additional refrigerant cannot be quickly filled to increase the pressure in the pipe, set the unit to cooling mode at startup and then fill the refrigerant from gas valve of outdoor unit. If ambient temperature is low, the unit can be set to heating mode instead of cooling mode. YMGI • Your Modern Green Idea...
-
Page 39: Electric Wiring
8. Wiring diagram attached on the unit is the most accurate. Wiring of power cord Every unit should have corresponding short-circuit and overload protection. And also a main switch is required to control power supply or disconnection. See Fig.38. Fig. 38 YMGI • Your Modern Green Idea... - Page 40 3) Drainage pipe. 4) Other places that are considered by professionals as unreliable. Power cord and communication wire should be separated, with a distance of more than 20cm (7-7/8in.). Otherwise, system’s communication may not work well. YMGI • Your Modern Green Idea...
- Page 41 (for power supply) that are marked with L1, L2, L3 and the ground screw nearby. Use cable ties to tie the cable securely. Lead the power cord as instructed in the graphic below: Fig. 39 YMGI • Your Modern Green Idea...
-
Page 42: System Communication
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. Graphics of general communication connection. Fig. 40 YMGI • Your Modern Green Idea... - Page 43 2. The cord should be Circular cord (the cores shall be ≥2×AWG18 polyvinyl chloride L≤1000(3280-5/6) twisted together). sheathed cord. 3. If unit is installed in places with intense magnetic field or strong interference, it is necessary to use shielded wire. YMGI • Your Modern Green Idea...
- Page 44 All of the selected communication wire must be consistent with local laws and regulations. Connection mode of communication All communication wires of VRF must be connected in series rather than in star. Fig. 43 Fig. 44 YMGI • Your Modern Green Idea...
- Page 45 When installing remote monitor or central controller, displacement on indoor units’ project codes must be made. Otherwise, there will be collision malfunction of the project codes. For detail operation methods, please refer to the VRF Installation and Maintenance Manual. YMGI • Your Modern Green Idea...
- Page 46 The centralized controller can be installed when it is necessary. Connect IDU and ODU via terminal D1/D2 of wiring board XT2. Below are the connection graphics of single unit and modular units: Fig. 47 YMGI • Your Modern Green Idea...
- Page 47 4. Communication wire must be of proper length. Extension is not allowed. 5. IDUs must be connected in series. The last IDU must be connected with the communication matched resistance (supplied in the list of ODU spare parts). YMGI • Your Modern Green Idea...
-
Page 48: Communication Connection 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 IDU Fig.51 One wired controller controls multiple IDUs YMGI • Your Modern Green Idea... - Page 49 When the duct type IDU needs to be connected to light board remote receiver, it can be connected via Dsp1 and Dsp2 on the IDU main board. Main board interface of IDU type Connection wire corresponding IDU Dsp1 (direct to 8-core interface) Duct type IDU Between boards (17-core) Dsp2 (direct to 9-core interface) YMGI • Your Modern Green Idea...
- Page 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 time. YMGI • Your Modern Green Idea...
- 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 multi VRF system (see below) Fig.54 YMGI • Your Modern Green Idea...
- Page 52 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. External wiring diagram of a single unit Fig.55 The maximum number of IDU is based upon ODU capacity. For details, please refer to the introduction of unit combinations. YMGI • Your Modern Green Idea...
- Page 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 introduction of unit combinations. YMGI • Your Modern Green Idea...
-
Page 54: Check Items After Installation And Trial Run
Check if the terminals of electrical element are loose and the phase sequence is correct. Check the valve: For single-module unit, fully open the gas and liquid valve and close oil balance valve. For dual/three module units, fully open the gas, liquid valve and oil balance valve. YMGI • Your Modern Green Idea... - Page 55 Fig.58 Before debugging, make sure the needed amount of refrigerant has been added to the pipe or at least 70% of the needed refrigerant has been added. Description of each stage of debugging progress: YMGI • Your Modern Green Idea...
-
Page 56: Debugging
Outdoor valves are being turned on. judgments of light light light Outdoor valves are not fully turned on. outdoor valves light light light Outdoor valves are turned on normally. before startup YMGI • Your Modern Green Idea... - Page 57 01 (2s later) 00 (2s later) U8, and repeat again. Debugging is finished. System is on standby 17_Debugging 01~04 light light light condition. LED1 displays module address. finished LED2 and LED3 display “OF”. YMGI • Your Modern Green Idea...
- Page 58 Step 7: in progress 03, the quantity of modules needs to be confirmed manually. Main board of each module will display: Debugging Code Progress Code Status Code LED1 LED2 LED3 Progress Code Display status Code Display status Code Display status Quantity of 03_Quantity of modules light light blink modules YMGI • Your Modern Green Idea...
- Page 59 System detects “driven communication error Light Light Light internal between master unit and inverter fan”. communication IDU/ODU “high proportion of rated capacity”. Light Light Light IDU/ODU “low proportion of rated capacity”. Light Light Light YMGI • Your Modern Green Idea...
- Page 60 XXXX is the project no. of the faulted IDU. 3s later, relevant error code is displayed. For example, IDU no. 100 has d5 error, then LED3 displays like this: 01 (2s later) 00 (2s later) d5, and repeat again. Elimination methods of above error can be found in Troubleshooting. YMGI • Your Modern Green Idea...
- Page 61 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status 09_Refrigerant System refrigerant is not enough. System judgments Light Light Light downtime equilibrium pressure is lower than before startup 0.3MPa (4-2/5psig). YMGI • Your Modern Green Idea...
- Page 62 Progress Code Status Code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status 12_Status judgments of Light Light Blink Ready for units to start debugging. outdoor valves before startup YMGI • Your Modern Green Idea...
- Page 63 IDU. 3s later, XXXX/ error code U8 is displayed. For example, IDU Light Light Light no. 100 has U8 error, then LED3 displays like this: 01 (2s later) 00 (2s later) U8, and repeat again. YMGI • Your Modern Green Idea...
- Page 64 Step 19: after debugging is finished, some functions can be set up according to project’s actual needs. For specific details, please refer to System Functions Setup. If no special requirements, skip this step. Step 20: deliver the product to user and inform user about usage precautions. YMGI • Your Modern Green Idea...
-
Page 65: Appendix: Judgement Reference Of Normal Operational Parameters
Normal bus voltage is 1.414 times of power voltage. For example, Inverter compressor 2 if 3-phase power voltage is 220V, then the bus voltage after rectification is: 220V X 1.414=311V. It’s normal if actual voltage driven bus voltage varies 15v from the calculated voltage. YMGI • Your Modern Green Idea... - Page 66 Water of ODU can be —— — system drained completely through drainage pipe. No water drop from unit base. Compressor and indoor/outdoor fan motor has no strange —— Others ºC (°F) noise. Unit operates normally. YMGI • Your Modern Green Idea...
-
Page 67: Common Malfunction And Troubleshooting
For detailed operation methods, please refer to the VRF Installation and Maintenance Manual. If problem cannot be solved after checking the above items, please contact YMGI service center with issue(s) and model numbers of units. -
Page 68: Error Codes
Oil-return pipe is leaking Malfunction of oil-return temperature sensor 1 malfunction of driving board of compressor Clock of system is abnormal Driving board of compressor operates abnormally Malfunction of inlet tube temperature sensor of condenser YMGI • Your Modern Green Idea... - Page 69 Malfunction of jumper cap Failure startup of inverter fan Web address of IDU is abnormal AC current protection of inverter fan Current sensor of compressor 1 is abnormal AC input voltage of drive of inverter fan YMGI • Your Modern Green Idea...
-
Page 70: Debugging Codes
Long-distance emergency stop High temperature prevention when heating Emergency stop of operation Eliminate the long-distance shielding command of IDU Limit operation Bar code inquiry Child lock status Length modification of connection pipe of ODU YMGI • Your Modern Green Idea... -
Page 71: Maintenance And Care
5. After long period of shutdown, open the main power switch 8 hours before reoperating the unit so as to preheat the compressor crankcase. 6. Check if the outdoor unit is installed firmly. If there is something abnormal, please contact the YMGI appointed service center. -
Page 72: User Notes And Installation/Service/Maintenance Notes
USER NOTES AND INSTALLATION/SERVICE/MAINTENANCE NOTES INSTALLATION NOTES Please list any questions or issues you may have with this unit: Asked Your Did You Ask YMGI Date Notes Technician for Help? Tech. for Help? YMGI • Your Modern Green Idea... - Page 73 USER NOTES Please list any questions or issues you may have with this unit: Technician Company Name, Technician Name, Job Not Performed Date Checklist Phone & HVAC License # by Technician Completed Fully? YMGI • Your Modern Green Idea...
- Page 74 SERVICE / MAINTENANCE NOTES Please list any questions or issues you may have with this unit: Technician’s Company Name, Technician Date Contents of Service / Maintenance Name, Phone & HVAC License # YMGI • Your Modern Green Idea...
- Page 75 YMGI • Your Modern Green Idea...
- Page 76 YMGI is dedicated to designing, manufacturing and distributing the highest quality, energy saving and environmentally friendly air conditioner and heat pump products, while providing the best service and support to all of our customers. Our mission is to help build a sustainable, efficient and Green world.
Need help?
Do you have a question about the VRFO-72VP-U2C(55)5 and is the answer not in the manual?
Questions and answers