VRF D4 PLUS System Digital Scroll Series GD Midea Heating & Ventilating Equipment Co., Ltd. Is certified under the ISO 9001 International standard for quality assurance. NO.01 100 019209 GD Midea Heating & Ventilating Equipment Co., Ltd. Is certified under the ISO 14001 International standard for environmental management. Certificate No.15912E10020R0L Dealer information Commercial Air Conditioner Business Units Midea Group Add: West region of Midea commercial air conditioner department,lndustry Avenue, Beijiao,Shunde,Foshan,Guangdong,P.R.China Postal code:528311 Tel:+86-757-22390820 Fax:+86-757-23270470 http://global.midea.com.cn http://www.midea.com Note:The data in this book may be changed without notice for further improvement on quality and performance. Highlights
Midea is proud to introduce its D4 PLUS SERIES VRF. Designed to optimize the system and better meet the market s needs. D4 PLUS SERIES VRF offers a capacity up to 64HP in 2HP increments by combining 4 outdoor units. It also incorporates a range of outstanding features, wide-range outdoor and indoor units, high external static pressure, and energy saving technologies. It supports an incredible piping length of 1,000m and a level difference of 110m, making it perfect for large high-rise buildings. There are two series: T1 series is suitable for cooling in -15~48, T3 series is suitable for cooling in -15~54 01 02
DC Inverter fan motor, high efficiency Energy saving DC inverter fan motor, stepless adjustment according to operation changing, ensure the system pressure in optimal status, running more efficient, more stable and lower noise. EFFICIENCY (%) 100 80 60 40 20 DC motor MOTOR SPEED (RPM) 18 steps vector control Increased by High 45% 200 1000 Low High efficiency heat exchanger Hydrophilic blue fins + inner-groove copper tube achieve a high efficiency heat exchanger. High IPLV value New design Original design IPLV value up to 5.1, higher than the industrial level of energy efficiency stands. Optimized hydrophilic blue fin design, be faster for water to drain after defrosting. The IPLV is derived from the equipment efficiency while operating at various capacities. IPLV = 0.01A+0.42B+0.45C+0.12D A = COP or EER at 100% Load; B = COP or EER at 75% Load; C = COP or EER at 50% Load; D = COP or EER at 25% Load. Inner-groove copper tube, enlarge the heat exchange area inside the tube. High efficiency inner-threaded pipe, enhance heat transfer. Hydrophilic film fins + inner-threaded pipes Step-less adjustment, wide capacity output Sub-cooling technology Thanks to digital scroll compressor, 10%-100% capacity output range, step-less adjustment, quickly reach setting temp, high EER, more energy saving. Capacity Output (%) 10(%) Digital scroll system Inverter system 100 (%) The heat exchanger is "δ" refrigerant flow way design, makes the outlet temperature lower, and the inlet high temperature gas hardly affects the sub-cooling. 12 C sub-cooling technology increase heat exchange efficiency. Common Design Sub-cooling Technology Load (%) 03 04
Precise refrigerant flow adjustment High precise electronic expansion valve(exv) is used to High reliability ensure precise control o refrigerant flow and indoor temperature. Internal and external refrigerant distribution, patent technology. Refrigerant saving at low load by accumulator, guarantee system precision operation SV EXV-A EXV-B connect to indoor unit High efficiency oil return technology Low pressure design of compressor The low pressure chamber design of the compressor is perfectly suited for high ambient conditions: the internal pressure and temperature of the compressor is kept low and stable, thus maximizing performance and efficiency. a. Effectively cools the compressor motor by suction gas; b. Creates stronger resistance to the compressor liquid hammer; c. Provides strong reliability in high ambient temperature. Discharge Suction Compressor motor Four stages oil control technology ensure every outdoor s and compressor s oil always keep in the safe level, completely avoid being oil shortage. 1st stage: compressor internal oil separate; 2nd stage: high efficiency oil separator; 3rd stage: oil balance technology between compressors; 4th stage: system oil return program. To condenser Oil separator 2nd stage Compressor 1st stage Oil separator 2nd stage Refrigerant oil Oil return program 4th stage Compressor 1st stage Oil balance 3rd stage From evaporator Precise pressure control Double backup operation According the pressure real time detected by the pressure sensor, the unit will precisely A comparison between the system pressure and the optimum pressure value will be made every ten seconds to adjust the speed of DC motor timely. Outdoor unit adopt double backup function. If one module failed, the other module can be backup instead of the failed one, or if one of the compressors in one module is failed, the other one can backup for continuing operation. adjust the DC fan speed to make the system pressure always working at the best status, Pressure sensor to test the system pressure at any time. which makes the system more reliable and extend the unit lifespan effectively. 05 06
Cycle duty operation Adopt well-know brand key components. In one combination, any of the outdoor unit can run as the master unit and master unit can cycle in a period, to realize the equal lifespan among the outdoor units. As a result extend the system lifespan significantly. The outdoor unit cycle duty operation active once when running max. 125 min. Copeland digital scroll compressor, USA brand ABB contactor, NEC main chips, Maxim brand communication chips. Japanese brand Saginomiya EXV and 4 valves. Branded key components, more reliable. New generation Free scale calculation chip, faster calculate speed and higher memory space. Copeland (USA): Compressor ABB (USA): Contactor Mitsubishi (Japan): Inverter module NEC (Japan): Main IC and Auxiliary IC Maxim (USA): RS485 communication Chip Saginomiya (Japan): EXV & 4-way valve Special anti-corrosion treatment(can be customized) With the special anti-corrosion treatment on the heat exchanger, electronic parts and other components of the unit, Multi-protection functions, more safe and reliable which is about 5 times as anti-salt effective as the normal ones, it makes the unit more suitable for the project nearby the sea. With more than 30 protections, such as phase sequence protection, high pressure protection, voltage protection, etc. which make the system more safe and reliable. Electronic control protections: Phase sequence protection voltage protection over current protection etc. System protections: Indoor and outdoor environment temperature protection; perfect combination of pipe temperature, discharge pressure and motor, compressor, etc. Compressor protections: High pressure protection, low pressure protection, discharge temperature protection, etc. The plastic planting grille protects against salt. All panel parts are corrosion resistant to protect against brine. Corrosion resistant heat-exchange fins are suitable for seaside areas and areas exposed to acidic substances. All screws are anti-rust. All PCB parts in the unit are coated with double-sided moisture proof paint. The outer side of the control box metal cover is spray-painted. 07 08
Flexible piping length Flexible design Longest piping actual length 175m 90m Level difference between IDU~ODU 110m Level difference between IDU~IDU 30m Max. total piping length up to 1000m. Max. piping actual length up to 175m. When outdoor unit is up, level difference between outdoor unit and indoor unit is up to 70m. When outdoor unit is down, level difference between outdoor unit and indoor unit is up to 110m. Level difference between indoor units is up to 30m*. *: For the tropical type units, the max. level difference between indoor units is 15m. Modular combination design Outdoor units can be freely combined. Max. 64HP (4pcs of 16HP units) can be combined in one refrigerant system. Max. 64 indoor units with capacity up to 130% of total outdoor units Anti-electromagnetic interference Less electromagnetic interference/disturbance, no EMC problem. Electromagnetic Comparison between Digital and Inverter EMW Inverter EMC Standard 5 4 Digital 8, 10,12HP (7.2, 8, 9.5RT) 14, 16HP (11.4, 12.8RT) 18, 20, 22, 24, 26, 28, 30, 32HP (15.2, 16, 17.5, 19.4, 20.8, 22.8, 24.2, 25.6RT) 3 2 1 0 5th 7th 11th 13th 17th 19th th: frequency of harmonic (such as 5th=5*50Hz=250Hz, 50Hz is the basic frequency. ) A 34,36, 38, 40, 42, 44, 46, 48HP (27.4, 28.8, 30.3, 32.2, 34.2, 35.6, 37, 38.4RT) 50, 52, 54, 56, 58, 60, 62, 64HP (40.8, 41.6, 43.1, 45, 47, 48.4, 49.8, 51.2RT) Professional selection program Two version of free selection program for the designers, which can make a load calculation, A/C Selection, Piping Drawing, Controller Selection, Electrical Drawing, Report Output, and the building CAD drawing of devices layout. Wide range operation temperature No matter in extremely cold winter when outdoor temperature down to as low as -20 or in hot summer when temperature is up to 54, the D4 Plus series system will keep stable operation. -15 C COOLING MODE Outdoor Temperature 54 C -20 C HEATING MODE Outdoor Temperature 27 C -20-10 0 10 20 30 40-50 60 Outdoor temp. C(D.B.) 09 10
User friendly Intelligent defrosting Intelligent defrosting program to judge the defrosting time according the system real requirement, reduce the heating loss by unnecessary defrosting and make the indoor side more comfortable. Every time defrosting last only 4 min. due to the use of specialized defrosting valve. Heating capacity Intelligent defrosting Usual defrosting t mini Δt Time Precise temperature control By utilizing the benefits of digital compressor, less temperature fluctuation, better living enviroment. Fluctuation of room temperature Cooling operation Digital Non-digital 1 2 Anti-vibration fan impeller design Max. 40Pa external static pressure Five mode priority The fan adopts 3 blades + 4 blades design, can decrease the vibration affectively. Max. 40Pa * external static pressure can be customized, it s flexible to meet the requirements for outdoor installation on each floor. 40 Pa Five mode priority selection, provide convenience to match the customer needs. *: 0-20Pa is standard, 20~40Pa can be customized. Heating priority mode; Cooling priority mode; Vote/VIP indoor units priority mode; Only respond heating mode; Only respond cooling mode Various flexible management Heating priority mode (default) Cooling priority mode VIP priority or vote priority Only respond the heating mode Only respond the cooling mode Intelligent manager of Midea (IMM) software; Compatible with the main BMS systems (such as Johnson Controls, Siemens, Honeywell and Schneider), via BACnet, Lonworks, Modbus, KNX, etc. IMM System Long distance PC (IMM) Night silent operation IP/Ethernet Firewall Through VPN Local PC (IMM) Router High comfort outdoor unit s multi-choice of silent mode during the night. The minimum noise level is low to 46.8dB. A/C Units Noise db Load % Capacity % 100 50 noisc -Model 1 X: 6 hours, Y: 10 hours -Model 3 X: 6 hours, Y: 12 hours 08:00 Peak value of ambient temp. 8hrs -Model 2 X: 8 hours, Y: 10 hours -Model 4 X: 8 hours, Y: 8 hours 10hrs Night silent Mode Max.-10dB(10Hp) Start End 14:00 22:00 08:00 BMS system Modbus BACnet Lonworks BMS System P,Q,E CCM03 F1,F2,E K1,K2,E CCM02 P,Q,E Max.64 Indoor Units Outdoor Units Max.64 Indoor Units Notes: This function can be activated by setting at site. Temperature(load) curve shown in the graph is just an example. K1,K2,E Outdoor Units 11 12
C Convenient installation & maintenance Module design, easy transport Compact size and light weight design minimizes the installation footprint, reduces the installation floor load, and is easier for transportation. For some projects the unit can even be transported through the elevator or forklift, reduce access problem at the jobsite. Simple communication wiring Auto addressing Centralized controller (CCM03) can connect from indoor side or outdoor side (XYE terminals) at will. With one group of wire, we can realize the network communication and system communication. The simple communication wiring is more convenient for installation work. P Q E P Q E P Q E P Q E Outdoor unit can distribute address for each indoor automatically. Wireless controller and wired X Y E X Y E P Q E controller can enquire and modify each indoor units address. Universal and compatible PCB design PC board is the same for all the modules, it is easy to set the dial code for modules with different capacity at site. Convenient inspection window Reserved inspection window on electric control box for convenient spot checking and status enquiry. Self-diagnosis function helps service engineers locate faults quickly and easily. Inspection window on electric control box for convenient spot checking and status enquiry. 13 14
Professional structure design Memo Compressor is located near the outside panel, which is convenient for checking and enables valve or compressor parts to be replaced easily. Diagnosis software for after-sale maintenance With this diagnosis software, it s easy for checking parameters of outdoor unit, error information and history data. It s convenient for after-sales and maintenance work. 15 16