COMMERCIAL AIR CONDITIONERS M Type Air Cooled Screw Chiller 2012

Transcription

1 MCAC COMMERCIAL AIR CONDITIONERS 2012 Commercial Air Conditioner Business Units Midea Air Conditioning and Refrigeration Sector Add: West region of Midea commercial air conditioner department, Industry Avenue, Beijiao, Shunde, Foshan, Guangdong, P.R. China Postal code: Tel: Fax:

2 Corporate Introduction Midea Group From its humble beginnings in 1968, Midea has developed into a large corporation, covering HVAC, appliances, lighting, industrial components, logistics, and real estate. Its 40 years of relentless growth has brought its global turnover to $14 billion USD in Consequently, Midea has created over,000 jobs both within China and all over the world. In addition to providing affordable goods to consumers worldwide, Midea is a responsible corporate citizen, and has contributed to several social causes. Midea believes in creating value through rapid response to market demands, cost-efficient operations and consumer satisfaction. As a result, Midea wields vast production capacities to meet these demands, a fully integrated manufacturing process, and a comprehensive range of affordable, high-quality products to serve its global customers. Midea CAC (MCAC) As a key part of Midea Group, the Midea Central Air Conditioner (CAC) Business Unit is a professional CAC products supplier and commercial products solution expert. Since 1999 Midea central air-conditioner contributes to the commercial product R&D and technology innovation. By cooperating with the international enterprises plus the independent R&D, Midea CAC achieves big success in the commercial air-conditioner market and has established thousands of sample projects all over the world. Right now Midea CAC is one of the most professional CAC products supplier as well as the professional project solution provider in marketing, sales, project design and after service etc. MCAC Chongqing factory with 14 product lines concentrates on the water cooled centrifugal / screw/ scroll chillers, Air cooled screw/ scroll chillers, AHU/FCU etc. MCAC Shunde factory with 31 product lines concentrates on the VRF (DC inverter product/ Digital scroll product), split product, heat pump water heater, AHU/FCU etc. Today, Midea is a home appliance leader in China. The company continues to actively globalize its operation by opening plants in Vietnam, Belarus and Egypt. Additionally, Midea has several forthcoming plants in order to offer enhanced products and services closer to the market.

3 07 R410A (25kW-250kW) 50Hz 04 MIDEA CHILLER MANUFACTURING-BASE INTRODUCTION CONTENTS With 46 years experience in chiller industry, Midea Chongqing chiller manufacturing base is becoming one of the largest chiller company in China. It covers an area of 800 Mu (137 acre), with a registered capital of 12.5 million US $ and a total investment of over 0.6 billion US$. There are 6 product series and over 100 model products including centrifugal chiller, screw water chiller, scroll water chiller, water-cooled packaged unit, and central air-conditioning indoor terminal device(ahu/fcu). Five chiller manufacturing shops with 14 flexible production lines lead an anual manufacturing capacity of 250 units centrifugal chiller, 1000 units of air cooled screw chiller, 2000 units of water cooled screw chiller and units of AHU product. Strong R&D and manufacturing capacity makes Midea Chongqing general become the fastest developing company in chiller industry. The chiller test lab which is certified by China National Refrigeration Equipment Inspection Center is the largest refrigeration test capacity in Asia. The engineer team with 100 top engineers and 2 chiller experts who were awarded by the central government in structure, electricity, performance testing and software aspect makes Midea the headship in chiller industry. In the year of 2011 Midea refrigeration group invests another million RMB for test lab as ARI test floor, big capacity air cooled screw life span testing room, 0kW compressor motor test floor, etc Nomenclature Brief introduction Mechanical components Specification Dimension PLC controller Field wiring diagram Concentrating on energy-saving and ejection-decreasing, Midea Chongqing chiller factory commits itself to the reliable and high efficiency products for the world. The chiller products are widely used in different countries and obtain good public praise from the clients. The solutions for the Beijing capital international airport,jakarta international airport, China rapid transit station won good feedback and commendation. Continuing with the past and opening up the future, Midea chiller brand will go further and create an illustrious future.

4 05 06 NOMENCLATURE BRIEF INTRODUCTION LS BLG C W XXX A Midea C series air cooled screw chillers are the premium solution for industrial and commercial applications where installers, consultants and building owners require optimal performances and optimized quality. Midea C series air cooled screw chillers are designed to meet current and future requirements in terms of reliability, energy efficiency and intelligent control. We use the best technologies available today: Twin-rotor screw compressor with a variable capacity valve is ideally matched to evaporator and condenser optimally configured for superior heat transfer and unit efficiency. Environmentally friendly refrigerants R134a. Low-noise,low-vibration high efficiency fans,high-efficiency rifled pipe with aluminum fin heat exchangers. Touchable screen with PLC control system is user-friendly operator interface. Completely assembled, factory wired, evacuated, charged, tested, ready for installation. A: CE certification Nominal cooling capacity (kw) Air cooled condenser Refrigerant type C R134a; Omit for R22 Compressor structure type BLG Semi-hermetic screw comp. Water chiller

5 07 08 FEATURES AND BENEFITS Environmental Care R134a refrigerant Refrigerant of the HFC R134a group with zero ozone depletion potential. It is environmentally safe and does not have a phase-out date. Economical Operation Cost Extremely high full load and partial load energy efficiency. New twin-rotor screw compressor equipped with a high-efficiency motor and a variable capacity valve that can adjust the capacity of 25%, 50%, 75% and 100% in 4 stages (Stepless control as an option) and permits exact matching of the cooling capacity to the actual load. Electronic expansion device permits the operation at a lower condensing pressure and improve the utilization of the evaporator heat exchange surface (superheat control). Automatic scheduling of the compressor allows the chiller to match the fluctuating cooling load and conserve energy. PLC Technology Accuracy Control The sensors related to control and other assemblies are equipped by factory and strictly tested. Intelligent control:the unit is controlled by micro-controller(plc) with has the automatic control functions of fault diagnosis, energy management and anti-freezing monitoring ensure the high-efficiency operation and more convenient in use. The unit with RS485 open protocol communication interface is BMS compatible. The startup and shutdown of each unit is controlled by the host computer, reducing the running cost to the lowest. Complete and safe control system: All electrically control elements are designed and selected with stable quality and reliable function; The unit designed with multiple security measures ensure the safe and reliable running witch including high and low pressure protection, oil feed pressure difference protection, anti-freezing protection, water flow protection, converse default phase protection, Overload protection etc. Lower Operating Noise The twin-screw compressor adopts the strong points of gapless-loss, high- efficiency cubage, low-noise, few easy workout parts. Double-wall structure not only compensates the pressure, but also significantly reduces the noise. Cast iron casing and oil separator can reduce the noise significantly. Low-noise fans, made of a composite material are even quieter and do not generate intrusive low-frequency noise. Rigid fan mounting is preventing start-up noise. Multiple direct drive dynamically balanced propeller fans operate at low tip speeds for maximum efficiency and minimum noise and vibration. A heavy-gauge vinyl-coated fan guard protects each fan. Outstanding Reliability Fully factory testing of all the units ensures a trouble free start-up. The unit has passed full factory test before being delivered to ensure the reliable working on the site. Transport test ensure the chiller in good condition after reach the site. Simple Structure Easy Installation The unit can be placed in service after being connected with power supply and water supply during field installation.standard flange connection and wire mesh to the electrical panel make the installation easy and simple.

6 09 10 MECHANICAL COMPONENTS Advanced Twin-Rotor Screw Compressor Midea air screw chiller is equipped with the 3rd generation industrial semi-hermetic screw compressor which with the latest advanced 5-6 asymmetry dentiform rotors. The rotors are processed by high-precision CNC and each part is well-proportioned and none-gap matching, which minimizes the friction resistance and clearance lost, guarantees quiet running and good duration. The compressor motor is direct drive type with two poles to operate at 2960 rpm (50HZ) input speed. It is non-reversing, squirrel cage induction type suitable for the voltage shown on the equipment schedule. Compressors combined an balance piston with separated radial and axial force bearings, oil cooler connector, liquid injection & economizer connector, PTC motor coil protection and discharge temperature & it's controller, oil level switch and oil pressure differential switch, oil sight glass, oil strainer, crank case heater and other accessories. The bearing of compressor is from SKF, Sweden gurantee the continuously runing more than 60,000 hours Condenser Air cooled condenser coil consist of staggered rows of seamless inner groove copper tube, mechanically expanded onto the die formed aluminum fin to ensure optimum heat exchange capability. Grooved condenser fin and tube condenser coils of seamless, internally enhanced, high condensing coefficient, corrosion resistant copper tubes arranged in staggered rows and mechanically bonded to corrosion resistant aluminum alloy fins with full height fin collars. Blue fin and black epoxy-coated aluminum fin are options. Fan Condenser Fans with low noise, full airfoil cross section for maximum efficiency, statically and dynamically balanced for low vibration operation, and positioned in extended, formed steel orifices for low sound and maximum efficiency. Condenser fan motors are high efficiency, direct drive, 6-pole, 3-phase, Class- F insulation and IP54 protection, current overload protected, totally enclosed type with double sealed, permanently lubricated, ball bearings Suction cut-off valve 5 Suction filter net 2 Solenoid valve 6 Motor 3 Discharge cut-off valve 7 Oil heater 4 Oil filter 8 Oil separator filter net Evaporator Evaporator is tube-in-shell heat exchanger design, with internally-finned copper tubes roller expanded into the tube sheet. Units are fabricated with high-performance tubing, steel shell & tube sheets. Water boxes are nozzle-in-head type with victaulic for easy connections. High efficiency, direct-expansion type evaporator with refrigerant in tubes and chilled liquid through the baffled shell. Design working pressure for the shell waterside is 1Mpa, and 2.1Mpa for the refrigerant side. Water baffles fabricated from galvanized steel to resist corrosion. Removable heads allow access to internally-enhanced, seamless, copper tubes. Water vent and drain connections including. The 20MM thickness insulation covers all low temperature surfaces include the evaporator, water box, oil return line, chilled water flow switch piping etc.

7 B K&B Danfoss B K&B Danfoss B K&B Danfoss MICROPROCESSOR CONTROLS Throttling Device Famous brand electronic expansion valve which control by drive module control. The drive module controller controls the valve according to evaporator suction superheat. PID arithmetic control the open degree of the valve. EKC312 M AKS M AKS Controls housed in a powder painted steel cabinet enclosure with hinged, latched, and gasket sealed, door. Liquid crystal 40 character display with text provided on two lines and light emitting diode backlighting for outdoor viewing. Color coded, 32 button, sealed keypad with sections for Display, Entry, Set points, Clock, Print, Program and Unit On/Off. Standard controls include: automatic pump down, run signal Refrigerant Circuit Independent refrigerant circuit per compressor, each using copper refrigerant pipe formed on computer controlled bending machines. Less piping brazed joints result in a highly reliable and leak resistant system. Liquid line components include: Manual shut-off valve with contacts, demand load limit from external building automation system input, unit alarm contacts, evaporator pump control, automatic reset after power failure, automatic system optimization to match operating conditions, software stored in non-volatile memory (EPROM) to eliminate chiller failure due to AC power failure. Programmed setpoints retained in lithium battery backed RTC memory for a minimum 5 years. charging port, high adsorption removable core filter-drier, solenoid valve, sight glass with moisture-indicator, and reliable electronic expansion valves for R134a and a thermostatic expansion valves for remote barrel units. CONDENSER TEMPERATURE SENSOR ANGLE VALVE FILTER DRIER TEMPERATURE SENSOR BALL VALVE BALL VALVE HIGH PRESSURE GAUGE SIGHT GLASS DUAL PRESSURE SWITCH PRESSURE RELIEF VALVE SOLENOID VALVE PRESSURE SENSOR LOW PRESSURE SWITCH COMPRESSOR COMPRESSOR THERMAL EXPANSION VALVE SOLENOID VALVE ELECTRONIC EXPANSION VALVE LOW PRESSURE GAUGE PRESSURE SENSOR ANGLE VALVE TEMPERATURE SENSOR EVAPORATOR WATER OUTLET DRAIN VALVE TEMPERATURE SENSOR ANTIFREEZING SWITCH WATER INLET TEMPERATURE SENSOR

8 13 14 OPTIONS APPEARANCE WATER FLOW SWITCH Water flow switch to protect the evaporator need to connect for upright mounting in horizontal pipe. (Field mounted) 360kW / 100RT unit VIBRATION ISOLATION Neoprene Isolation Recommended for normal installations and provides good performance in most applications for the least cost. (Field mounted) 1" Spring Isolators Level adjustable, spring and cage type isolators for mounting under the unit base rails. 1" nominal deflection may vary slightly by application. (Field mounted) 2" Seismic Spring Isolators Restrained Spring-Flex Mountings incorporate a rugged welded steel housing with vertical and horizontal limit stops. Housings designed to withstand a minimum 1.0g accelerated force in all directions to 50mm. Level adjustable, deflection may vary slightly by application. (Field mounted) 450kW / 120RT unit 600kW / 170RT unit EVAPORATOR 1.6Mpa or 2.0Mpa Waterside Working pressure - 1.6Mpa or 2.0Mpa of the evaporator waterside working pressure is optional. 30mm Insulation The thickness instulation provided for enhanced efficiency. Evaporator water pipe Flange connection CONDENSER Hydrophilic blue fins Anti-corrosion fins. This can provide corrosion resistance comparable to copper-fin coils in typical seashore locations. 720kW / 200RT unit POWER SUPPLY 415V-3P-50Hz 800kW / 225RT unit Note: For more application, please contact the local office. 900kW / 250RT unit

9 15 16 SPECIFICATION 1 Single compressor 2 Dual compressors Descriptions Unit Model LSBLGCW360A LSBLGCW450A LSBLGCW600 Descriptions Unit Model LSBLGCW720A LSBLGCW800A LSBLGCW900A capacity kw capacity kw supply V,3P+N+PE,50Hz supply 380V/3P/50Hz Rated power consumption kw Rated power consumption kw Compressor Type Quantity 1 Semi- hermetic, twin screw compressor 1 1 Compressor Type Quantity 2 Semi- hermetic, twin screw compressor 2 2 Energy adjustable range% 25%,50%,75%,100% 4-step ( 50%~100% stepless as option) Energy adjustable range% 25%,50%,75%,100% 4-steps ( 50%~100% stepless as option) Refrigerant Type Charge(kg) 80 R134a Refrigerant Type Charge(kg) 80 2 R134a Type Reversed M sharp Heat exchanger. High efficient exchanger tube + aluminum fins Type M type Heat exchanger, High efficient exchanger tube + Aluminum fins Air Side Heat-exchanger Fans Quantity Air Volume(m 3 /h) Air Side Heat-exchanger Fans Quantity Air Volume(m 3 /h) Motor input(kw) Motor input(kw) Type Shell-and-tube heat-exchanger Type Shell-and-tube heat-exchanger Water Volume(m 3 /h) Water Volume(m 3 /h) Water Side Heat-exchanger Water pressure drop(kpa) Water Side Heat-exchanger Water pressure drop(kpa) Inlet/outlet Pipe diameter(mm) DN125 DN125 DN125 Inlet/outlet Pipe diameter(mm) DN DN DN Water side fouling factor(m 2 C) (m 2.k) Water side fouling factor(m 2 C) Length(mm) Length(mm) Dimension width(mm) Dimension width(mm) height(mm) height(mm) Shipping weight(kg) Shipping weight(kg) Running weight(kg) Running weight(kg) Notes: 1) Nominal cooling capacities are based on the following conditions: Chilled water inlet/outlet temp: 12 C/7 C; Outdoor temp (DB/WB):35 C/24 C. 2) The applicable ambient temperature range of R134a air-cooled screw unit is 15 C~43 C. Notes: 1) Nominal cooling capacities are based on the following conditions: Chilled water inlet/outlet temp: 12 C/7 C; Outdoor temp (DB/WB):35 C/24 C. 2) The applicable ambient temperature range of R134a air-cooled screw unit is 15 C~43 C.

10 18 17 CAPACITY TABLE Model LSBLGCW360A LSBLGCW450A LSBLGCW Ambient temperature/ Outlet Temp. / Model LSBLGCW720A LSBLGCW800A LSBLGCW900A Ambient temperature/ Outlet Temp. /

11 19 20 DIMENSION (1)LSBLGCW360A units (2)LSBLGCW450A units DN DN DN DN

12 21 22 (3)LSBLGCW600 unit (4)LSBLGCW720 units Axial fan Control box Shell-and-tube heat exchanger 2430 Hoisting hole 610 Chilled water outlet 1100 DN Chilled water inlet DN125 Chilled water inlet DN Chilled water outlet DN Copper-fin heat exchanger Compressor

13 23 24 (5)LSBLGCW800 units (6)LSBLGCW900 units Chilled water inlet DN Chilled water outlet DN Chilled water inlet DN Chilled water outlet DN

14 25 26 INSTALLATION BASEMENT (1)LSBLGCW360A unit (3)LSBLGCW600 unit A B C B A Control box Unit bottom bolt M Control box Unit bottom bolt M14 C D F E D Model Weight to be supported by spring isolator(kg) A B C D Model Weight to be supported by spring isolator(kg) A B C D E F LSBLGCW360A LSBLGCW (2)LSBLGCW450A unit (4)LSBLGCW720A unit A B C A B C D Control box Unit bottom bolt M Control box Unit bottom bolt M E F G H D E F Weight to be supported by spring isolator(kg) Model A B C D E F LSBLGCW450A Weight to be supported by spring isolator(kg) Model A B C D E F G H LSBLGCW720A

15 27 28 (5)LSBLGCW800A unit Control box Unit bottom bolt M A B C D E 2180 Installation Requirements: 1. Be sure to take the base preparation and structure into consideration seriously during installation, especially avoid the intensity and noise of floor when the machine is installed on the top storey of buildings. It is recommended to discuss with the building designer before conducting installation. 2. The surrounding of the base shall be equipped with drainage ditch and make sure it can dewatering freely for convenient in drain. 3. Anti-vibration pad shall be placed between the base frame and fundation in order to avoid F G H I J transmitting vibration and noise during the runtime of the unit, and make sure the unit is aclinic during installation. Model LSBLGCW800A Weight to be supported by spring isolator(kg) A B C D E F G H I J Unit bottom Unit bottom (6)LSBLGCW900A unit Control box Unit bottom bolt M A B C D E F 2180 Spring shock absorber Rubber pad Steel Plate (thickness 5mm) G H I J K L Notes: 1) When adopting the fixing method as shown in Figure 2, reserve the space for the anchor bolt hole for installing shock absorber. Model LSBLGCW900A Weight to be supported by spring isolator(kg) A B C D E F G H I J K L ) When adopting the fixing method as shown in Figure 1, reserve the space for the mounting hole of the anchor bolt on the base frame according to the position of the mounting hole in installation drawing.

16 29 30 INSTALLATION SPACE CONSTRUCTION >1.8m >1.8m 1 Electric control cabinet >1.0m 2 Start up cabinet 3 Condenser 4 Compressor >1.0m 5 Evaporator >1.0m >1.8m >1.8m >1.8m >1.0m 1 Electric control cabinet 2 Condenser 3 Evaporator >1.0m 4 Compressor 4

17 31 32 PLC CONTROLLER PLC controller Midea LSBLGCW chiller adopts PLC controller which enables the user to monitor and control the chiller with high-class accuracy. PLC control system guarantees high precision and stability. The control system is module-designed, easy for installation and maintenance. The chiller which reserved with RS485 port can be interfaced with BAS (Building Automation system). The remote monitoring and control of the chiller is possible. Color touchable screen The display of control regulation and operating parameters, diagnostics, and error messages is a 7 inch, colors TFT displayer with 800 X 480 distinguish ability. The screen can display error codes, settings of various set points, specified temperature and pressure values, and the status of operating parameters and options. Multiple self-protecting functions High/low pressure protection lack phase protection Anti-freeze protection under cooling mode Frequent startup protection Over current protection of Comp. Overheat protection of compressor Water flow protection Reverse protection controller(aprs) Guarantee the Comp. running in the right range and its lifespan Protect Comp. from damage under such situation of lack phase and anti-phase Protect the copper pipes of evaporator from damage due to water freeze Protect Comp. from getting burned by the overheated winding due to frequent startup Protect Comp. from getting burned due to too heavy current Protect Comp. from damage due to lack of refrigerant or lubricant oil Protect Comp. from getting burned due to failure of heat-exchange Guarantee the comp. motor running in the right direction -down memory function When power-down, the chiller will maintain preceding running mode and parameter set point. Weekly operation scheduling The user can set the chiller operation schedule in the weekly timetable to run and stop the chiller automatically. If sudden power down happens, the chiller will not restart until manual reset. Data acquisition & Storing Max. 256 records of latest alarms and 500 seconds chilled/cooling water temperature trend display. 3-class passwords 3-class passwords are for the user, for Installation and for the Debugging technician of factory. Unauthorized access to the control is protected with random-generated password. Self-Diagnosis Self-diagnosis is always performed before start-up to enable safe operation. Only all the requirements get satisfied,the chiller will start. Multiple self-protecting functions guarantee the safety of unit and running perfectly. Y-Δ start up cabinet standard model 1)Structure simple and reliable 2)Starting current is only % of full load current 3)Lower voltage start up can effectively protect the motor

18 33 34 FIELD WIRING DIAGRAM APPLICABLE RANGE Content Running range Ambient TEMP. T1 Condition:15 ~43 Out water TEMP. 5 ~15 Water flow volume Rating flow volume±20% Max inlet/outlet water TEMP. difference 8 Voltage tolerance Rating Voltage±10% Phase tolerance ±2% supply frequency Rating frequency±2% Evaporator max working pressure on water side 1.0MPa Compressor max. start count 4 times/h Environment quality High corrosive environment and high humidity should be avoid Drainage system The height of water drainage should not be higher than the base of the unit on the spot Remote Start Remote Stop Flow switch Multi-units communication interface Pump Alarm run output Indication PE L3 L2L1 N TYPICAL WATER PIPING LAYOUT Automatic Watering To Drain ExpansionTank ELECTRIC PARAMETER TABLE Collector Model Main power V Hz Range Compressor Fan Highest Lowest Quantity Start current/a Highest running current/a Rated current/a Rated power Fan quantity Rate of fan/rpm Rated current/a Highest running current/a Stop Valve Pressure Gauge Water Flow Switch 3-Way Valve Soft Joint Distributer LSBLGCW360A 380/ % -10% LSBLGCW450A 380/ % -10% LSBLGCW600 LSBLGCW720A 380/ / % +10% -10% -10% Refer to 360A Y-Shaped Filter Thermometer Water Pump Check Valve Air Vent Drain valve LSBLGCW800A 380/ % -10% 2 Refer to 360A+450A LSBLGCW900A 380/ % -10% 2 Refer to 450A