MAXA R407C Technical Manual
  1. Manuals
  2. Brands
  3. MAXA Manuals
  4. Air Conditioner
  5. R407C
  6. Technical manual

MAXA R407C Technical Manual

Modular air-cooled chiller system
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
R407C
MODULAR AIR COOLED LIQUID CHILLERS AND HEATPUMPS
WITH AXIAL FANS AND SCROLL COMPRESSORS FROM 30 kW
TO 520 kW.
A21

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the R407C and is the answer not in the manual?

Questions and answers

Related Manuals for MAXA R407C

Summary of Contents for MAXA R407C

  • Page 1 R407C MODULAR AIR COOLED LIQUID CHILLERS AND HEATPUMPS WITH AXIAL FANS AND SCROLL COMPRESSORS FROM 30 kW TO 520 kW.
  • Page 2 CD 30 ÷ 520...

  • Page 3: Table Of Contents

    CD 30 ÷ 520 CONTENTS Modular Air-cooled Chiller System 1- Modular air-cooled Chiller System 1. Summarization ................5 2. Nomenclature ................6 Outlook view................6 4. System principle figure ..............7 Specification ................11 Sound pressure level..............15 7. Digital scroll compressor ............19 8. The capacity control of the new modular chiller......21 9.
  • Page 4 CD 30 ÷ 520 2- Electric control 1. Outlook view ................51 2. parts descriptions..............52 3. Failure & protections codes ............57 3- Wire controller 1. Outlook view ................59 2. Pattern & buttons description............60 3. Basic operating conditions ............62 4. Function description..............63...

  • Page 5: Summarization

    & outlet pipeline in series. The whole unit consists of 1-8 modules (or 2-16 units) and the max capacity is 480kW(520kW). Maxa Commercial Digital scroll air-cooled heat-pump module unit can be used widely in civil construction of AC engineering and industrial engineering, such as hotel, villa, restaurant, hospital, factory, etc.

  • Page 6: Nomenclature

    CD 30 ÷ 520 2. Nomenclature C D – M 30 Cooling capacity (kw) A: Auxiliary unit M: Main unit Digital Chiller 3. View of 30kW module (composed by just one basic unit)
  • Page 7 CD 30 ÷ 520 View of 65kW module (composed by two basic unit) 4. Principle of system Basic unit “Main and Auxiliary” from 30kW of cooling capacity is equipped with two independent refrigerant circuits, with two compressors (1 digital, 1 fixed), just one plate heat exchanger and just one control main board.
  • Page 8 CD 30 ÷ 520 Numbers of modules can be assembled together into a large unit by connecting each own inlet & outlet pipeline in series; can be connected together modules from 30kW and from 65kW of cooling capacity until 16 units and 520kW of cooling capacity; here below you can see the connection principle: Two modules 30kW connected in series...
  • Page 9 CD 30 ÷ 520 Two modules 65kW connected in series Two modules, one of 65kW and one of 30kW connected in series...
  • Page 10 CD 30 ÷ 520 To correctly operate the unit and ensure normal and safe running when the outdoor Temp is under 0°C in winter, the following should be noticed: If the unit will not be used for a long time, please drain water away to prevent the plate heat- exchanger from freezing.

  • Page 11: Specification

    30kW master+65kW master+ 1+0+0 0+1+0 1+0+1 0+1+1 1+0+2 0+1+2 1+0+3 0+1+3 65 kW auxiliary modules Compressor input kW 18.5 27.5 55.5 64.5 Refrigerant R407C Refrigerant kg 4.5*2 4.5*4 4.5*6 4.5*8 4.5*10 4.5*12 4.5*14 4.5*16 Water flow volume 1.45 3.11 4.56 6.62 7.67 9.33...
  • Page 12 30kW master+65kW master+ 1+0+4 0+1+4 1+0+5 0+1+5 1+0+6 0+1+6 1+0+7 0+1+7 65 kW auxiliary modules Compressor input kW 92.5 101.5 129.5 138.5 Refrigerant R407C Refrigerant kg 4.5*16 4.5*20 4.5*22 4.5*24 4.5*26 4.5*28 4.5*30 4.5*32 Water flow volume 13.89 15.56 18.67 20.11 21.78 23.22...

  • Page 13: Sound Pressure Level

    CD 30 ÷ 520 3. surrounding Temp. of unit work is shown as follows Name Cooling operation Heating operation Water-outlet temperature 7°C ÷ 12°C 45°C ÷ 50°C Air-side heat-exchanger 17°C ÷ 43°C -10°C ÷ 21°C Air-inlet temperature 6. Sound pressure level A ir o u tle t C e n te r D C e n te r B...
  • Page 14 CD 30 ÷ 520 Noise specification(30KW & 65KW) Noise dB(A) Capacity range (kW) Center A Center B Center C Center D Surface average noise CD 30 Octave bandwidth analysis Center A Center B Audibility limits of Audibility limits of continuous white continuous white sound sound...
  • Page 15 CD 30 ÷ 520 CD30 Average sound pressure level on surface Audibility limits of continuous white sound Octave band center frequency [Hz] CD 65 Octave bandwidth analysis Center A Center B Audibility limits of Audibility limits of continuous white continuous white sound sound Octave band center frequency [Hz]...
  • Page 16 CD 30 ÷ 520 Center C Center D Audibility limits of Audibility limits of continuous white continuous white sound sound Octave band center frequency [Hz] Octave band center frequency [Hz] CD65 Average sound pressure level on surface Audibility limits of continuous white sound Octave band center frequency [Hz]...

  • Page 17: Digital Scroll Compressor

    CD 30 ÷ 520 7. Digital scroll compressor Digital scroll compressor is made up of following components: fixed vortex plate, movable vortex plate, motor, suction and discharge pipe PWM(Pulse Width Modulation) solenoid valve and so on. It differs from ordinary scroll compressor: the compressor utilizes the axial flexible sealed technology and PWM solenoid valve to precisely adjust the axial moving range of the stator scroll plate.
  • Page 18 CD 30 ÷ 520 7.4 Principle of Digital Scroll Compressor The fixed vortex plate on the top is allowed to move upwards about 1 mm during the operation of the Digital Scroll. Lifting the top vortex plate ensures that there is no pumping through the vortex plate, and there is no mass flow through the compressor.

  • Page 19: The Capacity Control Of The New Modular Chiller

    CD 30 ÷ 520 unloading state time is 16 sec.the rest can be deduced by analogy. The following is schematic diagram when output capacity is respectively 10%, 50% and 100%. 8. The capacity control of the new modular chiller (1) Capacity adjustment of the system. Only the main unit can control the capacity output according to the temperature of total output water (Ts).
  • Page 20 CD 30 ÷ 520 unit will calculate 2 =Ts-45 then adjust the capacity output according T T=44 45 46 47 48 + 2 (T means the real temperature of total outlet water). The detail of heating capacity adjustment is as following chart: Heating capacity adjustment For example If the system have 11 sets of units, when T reduce to 45 in HEATING mode,...
  • Page 21 CD 30 ÷ 520 Temperature of plate heat exchanger Cooling capacity adjustment with digital control unit Temperature of plate heat exchanger Heating capacity adjustment with digital control unit 8.1. Heating and cooling capacity mod. 30 Kw Cooling capacity Power input Outlet water temperature Outlet water temperature Ambient temp.
  • Page 22 CD 30 ÷ 520 Cooling capacity 5ºC 7ºC 9ºC 12ºC The diagram shows the capacity progress among ambient temperature and outlet water temperature of 5°C, 7°C, 9°C, 12°C 25ºC 28ºC 30ºC 32ºC 35ºC 38ºC 40ºC Ambient temperature Power input in cooling The diagram shows the power input progress among ambient temperature and outlet water...
  • Page 23 CD 30 ÷ 520 Heating capacity 39ºC 42ºC 45ºC 48ºC 50ºC The diagram shows the capacity progress among ambient temperature and outlet water temperature of 39°C, 42°C, 45°C, 48°C, 50°C 13ºC 10ºC 7ºC 2ºC -2ºC -6ºC -10ºC Ambient temperature Heating capacity 39ºC 42ºC 45ºC...
  • Page 24 CD 30 ÷ 520 Cooling capacity 5ºC 7ºC 9ºC 12ºC The diagram shows the capacity progress among ambient temperature and outlet water temperature of 5°C, 7°C, 9°C, 12°C 25ºC 28ºC 30ºC 32ºC 35ºC 38ºC 40ºC Ambient temperature Power input The diagram shows the power input progress among ambient temperature and outlet water 5ºC...
  • Page 25 CD 30 ÷ 520 Heating capacity 39ºC 42ºC 45ºC 48ºC The diagram shows the capacity 50ºC progress among ambient temperature and outlet water temperature of 39°C, 42°C, 45°C, 48°C, 50°C 13ºC 10ºC 7ºC 2ºC -2ºC -6ºC -10ºC Ambient temperature Power input 39ºC 42ºC 45ºC...

  • Page 26: Features

    CD 30 ÷ 520 Widen capacity range from 10% to 100%; Stepless energy adjustment with higher SEER and lower energy consumption; The PWM solenoid valve can be used 40 million times on average, about 30 years; High reliability and compressing ratio by utilizing axial flexible sealing technology; Outstanding SEER approved by JIS and ARI;...
  • Page 27 CD 30 ÷ 520 Easy control, energy saving When unit is running, the controller can automatically adjust each module’s capacity output or turn on, shut down the corresponding modules according to the system requirement. Each unit applies dual compressors that can achieve the best effect of energy saving by further elaborated adjustment.

  • Page 28: Unit Installation

    CD 30 ÷ 520 10. Unit installation Transportation Be sure that the package will be transported safely, unpack until arrive at installation site The leaning angle during the transportation should be smaller than 15 degree to prevent the module from rolling over. When transporting the module with rolling bars, it is recommended to use 6 bars under the module, each one should be a bit longer than the width of basement to keep the module’s in balance.
  • Page 29 CD 30 ÷ 520 Required installation places Clean, bright and well ventilated place such as roof, balcony or courtyard. Places without the interference of lampblack, steam and other kind of heat source. Places where it is convenient for pipeline installation and water draining with the least influence to surroundings, which is caused by noise and cool or heat wind.

  • Page 30: Water System Installation

    CD 30 ÷ 520 Installation reference The installation basement for main module is shown as follows; the auxiliary module is the same as the main one. 60mm distance should be left between modules. The weight that the concrete can support should be 1.5 to 2 times of the weight of modules when the modules are installed on the ground.
  • Page 31 CD 30 ÷ 520 In the cold winter, if the unit stops at night, the water in plate heat exchanger and pipeline may freeze, which will damage the device and pipeline. To prevent freezing, it is absolutely forbidden to switch off the power of the unit (the unit has auto anti-freeze function). If it is still likely to freeze, it must drain away all water in the water pipe.
  • Page 32 CD 30 ÷ 520 rating. If it is unavailable to shorten the wire, thicker wire is available. All wire must conform to concerning national standards and well insulated. The insulation between terminals and modules should be Queryed by 500v high resistance meter and its insulation resistance should be not less than 10 For safety, according to the concerning standards, unit should be grounded well to prevent electric shock.

  • Page 33: Debugging

    CD 30 ÷ 520 Auxiliary electric heater control wire connection: the control wire of AC contactor must pass the main unit’s H1, H2 terminals as below: Water pump control wire connection: the control wire of AC contactor must pass P1 P2 terminals of main unit as below: Notice: Water flow switch, water pump and auxiliary electric heater can just be connected to the main unit controller which is set as 0 addresses.
  • Page 34 CD 30 ÷ 520 Warning: address switch setting must be done without any electric supply and when the unit is electrified, setting is absolutely forbidden. Corresponding table between Unit address setting address code and unit address Address Unit address code NO.
  • Page 35 CD 30 ÷ 520 “00” presents to select digital compressor (as the main unit.) “11” presents to select constant compressor (as the auxiliary unit.) Please turn on the main power 12 hours before staring to preheat the compressor. If the compressor is not preheated enough, it maybe damaged.
  • Page 36 CD 30 ÷ 520 Models High-pressure Reset automatically unadjusted switch Cut off Close Low-pressure Reset automatically unadjusted switch 0.03 Cut off 0.15 Close Controlled by micro- controller When the Temp. is lower than 125 , compressor will not work. When the Temp. is higher than 125 Temp Sensor inside the , the capacity output of digital compressor will digital compressor...

  • Page 37: Maintenance

    CD 30 ÷ 520 13. Maintenance To ensure the unit can reliably run for a long time, debugging and maintenance should be done by the qualified persons. The items below should be noticed especially. Warning If it is on fire, switch off the main power at once and eradicate the fire with extinguisher. The unit can’t be operated near the flammable gas to prevent fire or explosion.
  • Page 38 Query water pump, adjust switch and other devices of the water system. Tighten all the wire connections. Accessory replacement Only MAXA accessory can be used and please don’t use any different one. Refrigeration system Query the discharge and suction pressure to determine whether the unit needs to recharge or not.
  • Page 39 CD 30 ÷ 520 2) Vacuum refrigerant pipeline more than 15 minutes and confirm it achieve -1.0 10 -76cmHg . 3) After having achieved the designated vacuity, add refrigerant to the system from the cylinder, corresponding volume of the refrigerant can be got from the nameplate and parameters table.
  • Page 40 CD 30 ÷ 520 Remove compressor If it is necessary to remove the compressor, please operate with the sequence below: 1) Switch off the power 2) Remove the electric wire 3) Remove the suction and discharge pipeline 4) Loosen the fixing bolts. 5) Remove the compressor.

  • Page 41: Troubles And Solutions

    CD 30 ÷ 520 14. Troubles and solutions Troubles Possible reasons Solutions Air or other gas enter the system Discharge the gas from refrigerant charging hole, re-vacuuming Fins are dirty or jammed by some necessary obstacles Clean the fins of condenser High discharge condenser wind...
  • Page 42 CD 30 ÷ 520 Low discharge Low Temp of cooling water Query the Temp of cooling water pressure Refrigerant leak or insufficient Leak hunting or recharging (Heating) Low suction pressure Refer to “low suction pressure” part High suction High surrounding Temp Measure the surrounding Temp pressure Refrigerant over-charged...
  • Page 43 CD 30 ÷ 520 Temp protection. Query the inner Temp sensor, when the motor is cool Filter jammed before (or after) Replace filter Compressor stop electric expansion valve by the Low-pressure switch failure If failure confirmed, replace it. low-pressure Low suction pressure Refer to “low suction pressure”...
  • Page 44 CD 30 ÷ 520 15. Electric control figure (main unit) BLUE BLUE YELLOW ORANGE BLACK BLUE BLACK WHITE WHITE BLUE BLUE BLACK...
  • Page 45 CD 30 ÷ 520 16. Electric control figure (auxiliary unit)
  • Page 46 CD 30 ÷ 520 17. Unit electric control & communication figure for 30KW unit...
  • Page 47 18. Unit electric control & communication figure for 65KW unit...

  • Page 48: Installation System Figure

    CD 30 ÷ 520 19. Installation system figure...
  • Page 49 CD 30 ÷ 520 Unit electric controller 1. Outlook view 10 9 8 Notice: Failure When main unit fails, the unit stops as well as the others stop too. When auxiliary unit fails, this unit stops while the others keep running. Protection When main unit’s protection acts, the unit stops while the others keep running.
  • Page 50 CD 30 ÷ 520 2. Components description 1——Compressor B current detection (Protection code P5) 2——Compressor A current detection (Protection code P4) The current will not be detected at the first 5 seconds when starting, after that, if the current is exceeds the pre-set protection standard, (18A for both of digital and constant), compressor will stop, and restart 3 minutes later.
  • Page 51 CD 30 ÷ 520 plate heat exchanger both in cooling and heating modes Adjusting range: OFF, 40%, 60%, 80% and 100%. 7——QUERY It can be achieved by QUERY to observe the running condition of the outdoor systems. The corresponding data will be shown as follows:...
  • Page 52 CD 30 ÷ 520 8——DIGIT Digital compressor selecting switch. “00” presents selecting digital compressor (as the main unit.) “11” presents selecting constant compressor (as the auxiliary unit. 9——ADDRESS 0 presents NO. 0 main unit 1 F presents NO 1 15 auxiliary units respectively 10——COM(O)485 communication port (failure code E2).
  • Page 53 CD 30 ÷ 520 System B low-pressure protection (protection code P3) Constant compressor: discharge Temperature switch is connected in series with high-pressure switch. Digital compressor: double protection of discharge Temperature Switch and discharge Temperature Sensor, discharge Temperature Switch is connected in series with high-pressure switch, and the discharge Temperature Sensor has its own interface.
  • Page 54 CD 30 ÷ 520 18—— WATER PUMP Notice: the actual figure of controller of the pump is not the 220V power supply but the ON/OFF switch! Water pump will start at once after receiving the opening order and keep running during the whole running term of the system.
  • Page 55 CD 30 ÷ 520 failure then the corresponding code will be displayed until the power get right. Notice: phases sequence failure or phases absent failure are just Queryed at the beginning of electrifying. During the running, they will not be detected. 27——Transformer output 3.
  • Page 56 CD 30 ÷ 520 Wire controller 1. Outlook view Figure of display (front view) Figure of buttons arrangement (front view) Dimension: Notice: Wire controller earthing mark on the rear of the controller. The P, Q, E terminals of main unit and wire controller are connected one-to-one. Three-core wire is used as the electric wire, and the model is RVV-300/500 3×1.5mm Dual-core shield wire is used as the communication wire, and the model is RVVP-300/300 2×0.5mm...
  • Page 57 CD 30 ÷ 520 2. Pattern& buttons description Pattern description 1——Running state (display on all pages). If there are more than one unit working, these will display in cycle: No display, when unit is off. 2——Communication state (display on all pages) While communicating normally with main unit, these will display in cycle: (blank), No display, when communication with main unit fails.
  • Page 58 CD 30 ÷ 520 display when pressing, if current page is 1 , the last page will display when pressing again. 4——Page down Just be available on the main page and Query page, the data on the next page will display when pressing, if current page is the last, the 1ST page will display when pressing again.
  • Page 59 CD 30 ÷ 520 invalid. On the other hand, if there are some units running (including manual/auto state), pressing ON/OFF means OFF, and Mode, Manual/Auto, Address Up/Down buttons are invalid; if unit is off, pressing ON/OFF means ON, and Mode, Manual/Auto, Address Up/Down buttons are valid.
  • Page 60 CD 30 ÷ 520 mode and the indicator lights will be off, then return to home page. 2——Mode setting 1) Mode setting page can be selected by the local wire controller button operation, and under this page, you can set the number of the unit which needs to operate. A) On Auto mode, the mode setting is for the whole unit.
  • Page 61 CD 30 ÷ 520 2) Host Computer mode setting (preserved) Epigyny If the mode information sent by host computer is appropriate to the current mode, then the mode setting information will be sent to main unit and computer will get the response. On the contrary, if it is conflict with current mode or mode setting fails;...
  • Page 62 CD 30 ÷ 520 Outdoor temperature T4 Available displaying range: -15 ~70 , display 70 if it is higher than 70 , if there is no valid data to show, display “--” and turn on . 2) Current display System A compressor current IA System B compressor current IB Available displaying range: 0A~99A, display 99A if it is more than 99A, if there is no valid data to show, display “--”...
  • Page 63 CD 30 ÷ 520 Available range is 0~16. 4——Home page display Home page consists of numbers of pages, and have no definite number. 1) Display page 1 as Default, show other pages in cycle by pressing page up/down button. 2) The total outlet water temp is shown on page 1 in the upper area. Then the total outlet water temp and T4 display in cycle according to the page sequence.
  • Page 64 CD 30 ÷ 520 Area 1 Area 2 5——Query page display Query pages consist of definite numbers of pages. 1) 0# unit is selected as default when entering Query page at the first time, then page 1 will be displayed. Other pages could be achieved by pressing page up/down. 2) Following information are shown in the upper area from page 1 to 5 respectively: plate heat exchanger outlet water Temp.
  • Page 65 CD 30 ÷ 520 4) Failure codes of current unit are shown in the lower area from page 3. 4 failure codes can be displayed by paging down. If there are more than 4, the rest will not be displayed. If there are no failure, then only one page displays “E-“...
  • Page 66 CD 30 ÷ 520 6——Running mode setting page display Only one page for this situation. 1) Usually, the upper area is blank. After setting the running mode, it will show whether the mode setting is successful or not. It will turn blank when the displaying time is over. 2) In manual mode, lower display area shows current running units address from 1 to current online units’...
  • Page 67 CD 30 ÷ 520 and the locking state will be sent to computer. 9——Failure alarm operation When there is protection or failure, wire controller indicator light will flash with 5Hz’ frequency. Pressing QUERY and PAGE UP/DOWN can inquiry the corresponding module and codes.
  • Page 68 CD 30 ÷ 520...
  • Page 69 CD 30 ÷ 520...
  • Page 70 Verona - Italy Tel. +39 - 045.76.36.585 r.a. Fax +39 - 045.76.36.551 r.a. www.maxa.it e-mail: maxa@maxa.it The data indicated in this manual is purely indicative. The ma- nufacturer reserves the right to modify the data whenever it is considered necessary.

Table of Contents