Mark MISTRAL MDX 33 Technical Manual
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Mark MISTRAL MDX 33 Technical Manual

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Summary of Contents for Mark MISTRAL MDX 33

  • Page 1 Technical manual...
  • Page 3 General Application Appliance type MISTRAL MDX 33 is solely suitable for the free and direct intake of the air to be heated and the free discharge of heated air into the room. If areas are to be heated in which corrosive vapours are present (chlorinated hydrocarbons in particular),...

  • Page 4: Technical Specifications

    Technical specifications Technical specifications Type MDX 33 Power Nominal capacity 33,5 Absorbed power 15,3 2,19 Nominal capacity 37,5 Absorbed power 9,08 Nominal capacity 30,7 Absorbed power 10,79 SCOP 4,05 Electrical data Power supply Ph/V/Hz 3/380-415/50 Maximum current 19,60 Fuse Refrigerant features Refrigerant R410A Quantity refrigerant pre-load...

  • Page 5: Heating Capacities

    Heating capacities Outdoor air Indoor air temp. ºC DB temp. ≤ 16 ºC DB ºC WB -19.8 30.71 10.79 30.60 10.91 30.48 11.03 30.48 11.09 30.48 11.16 30.36 11.29 -18.8 31.19 10.82 31.07 10.94 30.96 11.05 30.95 11.11 30.95 11.17 30.83 11.30 -16.7...
  • Page 6 Unit Placement and Installation Acceptance and unpacking When units are delivered check whether any damage occurred during shipment. » If there is damage to the surface or outside of a unit, submit a written report to the shipping company. Check that the model, specifications and quantity of the units delivered are as »...
  • Page 7 Figure 3.1 Single unit installation (unit: mm) Figure 3.2 Parallel connect the two units or above (unit: mm) Figure 3.3 Parallel connect the front with rear sides (unit: mm) 3.2.3 Base structures Outdoor unit base structure design should take account of the following considerations: A solid base prevents excess vibration and noise.

  • Page 8: Indoor Units

    A drainage ditch should be provided to allow drainage of condensate that may form » on the heat exchangers when the units are running in heating mode. The drainage should ensure that condensate is directed away from roadways and footpaths, especially in locations where the climate is such that condensate may freeze.

  • Page 9: Refrigerant Piping Design

    Refrigerant Piping Design Design Considerations Refrigerant piping design should take account of the following considerations: The amount of brazing required should be kept to a minimum. » On the two inside sides of the first indoor branch joint the system should, as far »...
  • Page 10 difference requirements that apply are summarized in the tables below. The max height drop (m) The length of The number refrigerant pipe (m) of bends Outdoor unit is above Outdoor unit is below max 90 / min 2 ≤ 10 Equivalent lenght of all liquid pipes Equivalent lenght of all liquid pipes and gas pipes <...

  • Page 11: Refrigerant Piping Installation

    Figure 4.1 Potential refrigerant leak scenario MISTRAL MDX MISTRAL MDX outdoor unit indoorunit Figure 4.2 Mechanical ventilator controlled by refrigerant leak detector OUTSIDE AIR AIR VENT LEAKAGE DETECTOR CONNECTED TO MECHANICAL VENTILATOR Refrigerant Piping Installation Procedure and Principles 5.1.1 Installation procedure Installation of the refrigerant piping system should proceed in the following order: Pipe Pipe brazing and...
  • Page 12 5.1.2 Three principles for refrigerant piping Reasons Measures Particles such as oxide produced Seal piping during storage » during brazing and/or building Flow nitrogen during brazing » CLEAN dust can lead to compressor Pipe flushing » malfunction Moisture can lead to ice formation Pipe flushing »...
  • Page 13 Insert the expanding head of the pipe expander into the pipe. After completing » pipe expansion, rotate the copper pipe a few degrees to rectify the straight line mark left by the expanding head. CAUTION! Ensure that the expanded section of piping is smooth and even. Remove »...
  • Page 14 surfaces of the flared opening to facilitate the connection and rotation of the flare nut, ensure firm connection between the sealing surface and the bearing surface, and avoid the pipe becoming deformed. 5.3.5 Bending piping Piping bending methods Hand bending is suitable for thin copper piping ( 6.
  • Page 15 expansion and shrinkage of the refrigerant piping. Piping should therefore not be fixed too tightly, otherwise stress concentrations may occur in the piping, with the potential for rupturing. Brazing Care must be taken to prevent oxide forming on the inside of copper piping during brazing.
  • Page 16 Figure 5.5 Flowing nitrogen from shorter side during brazing Piping orientation during brazing Brazing should be conducted downwards or horizontally to avoid filler leakage. Figure 5.6 Piping orientation during brazing Piping overlap during brazing The table below specifies the minimum permissible piping overlap and the range of permissible gap sizes for brazed joints on piping of different diameters.
  • Page 17 Filler Use a copper/phosphorus brazing alloy (BCuP) filler that does not require flux. » Do not use flux. Flux can cause corrosion of piping and can affect the performance » of compressor oil. Do not use anti-oxidants when brazing. Residue can clog piping and damage »...
  • Page 18 9. Once flushing is complete, seal all openings to prevent dust and moisture from entering. Figure 5.8 Pipe flushing using nitrogen liquid pipe gas pipe Outdoor unit Indoor unit A Gas tightness test 5.7.1 Purpose To prevent faults caused by refrigerant leakage, a gas tightness test should be performed before system commissioning.
  • Page 19 (temperature at observation – temperature at pressurization) x 0.01MPa. Compare the observed pressure with the adjusted reference pressure. If they are the same, the piping has passed the gastightness test. If the observed pressure is lower than the adjusted reference pressure, the piping has a micro leakage. If the leakage is detected, refer to 5.7.3 “Leak detection”.
  • Page 20 system would cause abnormal operation, whilst particles of oxidized copper can cause compressor damage. The presence of non-condensable gases in the system would lead to pressure fluctuations and poor heat exchange performance. Vacuum drying also provides additional leak detection (in addition to the gas tightness test).

  • Page 21: Drain Piping

    After vacuum drying, keep the blue and red hoses connected to the pressure gauge » and to the outdoor unit stop valves, in preparation for refrigerant charging (see Chapter 8 “Charging Refrigerant”). Figure 5.10 Vacuum drying Drain Piping* * If the MISTRAL MDX is only used in heating mode, a condensation drain is not necessary.
  • Page 22 Figure 6.2 Drain piping joints – correct and incorrect configurations Branch drain piping should join main drain piping from the top, as shown in Figure » 6.3. Recommended support/hanger spacing is 0.8 – 1.0m for horizontal piping and 1.5 – 2.0m for vertical piping. Each vertical section should be fitted with at least two supports.
  • Page 23 Figure 6.5 Drain piping water traps Selecting Piping Diameters Select branch drainage piping (the drain piping connection to each unit) diameters according to indoor unit flow volume and select main drainage piping diameters according to the combined flow volume of the upstream indoor units. Use a design assumption of 2 liters of condensate per horsepower per hour.
  • Page 24 considerations: A downward sloping section should immediately follow the vertically rising section » adjacent to the unit, otherwise a water pump error will occur. Refer to Figure 6.6. Air vents should not be installed on vertically rising sections of drain piping, »...

  • Page 25: Refrigerant Piping Insulation

    Water flow test (natural drainage test) Slowly fill the drainage pan of each indoor unit with at least 600ml of water through » the inspection port and check that the water is discharged through the outlet of the drain piping. CAUTION! The drain plug in the drainage pan is for removing accumulated water prior to »...
  • Page 26 7.1.4 Installation of piping insulation With the exception of joint insulation, insulation should be applied to piping before fixing the piping in place. Insulation at joints in refrigerant piping should be applied after the gas tightness test has been completed. Installation of insulation should be carried out in a manner suited to the type of »...

  • Page 27: Charging Refrigerant

    Ducting Insulation Suitable insulation should be added to ducting in according with all applicable » legislation. Charging Refrigerant Calculating Additional Refrigerant Charge The additional refrigerant charge required depends on the lengths and diameters of the outdoor and indoor liquid pipes. The table below shows the additional refrigerant charge required per meter of equivalent pipe length for different diameters of pipe.

  • Page 28: Electrical Wiring

    After vacuum drying (see Part 5.8 “Vacuum Drying”), the blue and red pressure » gauge hoses should still be connected to the pressure gauge and to the master unit stop valves. Connect the yellow hose from the pressure gauge to the R410A refrigerant tank. »...

  • Page 29: Communication Wiring

    parallel. However, the communication wiring should not be bound together with the refrigerant piping or power wiring. To prevent signal interference, the power wiring and communication wiring should not be run in the same conduit. If the power supply is less than 10A, a separation of at least 300mm between power wiring and communication wiring conduits should be maintained;...

  • Page 30: Wiring Example

    Wiring example For the electrical diagram of the indoor unit, please see the technical manual of the indoor unit Mistral MDX.

  • Page 31: Placement And Installation

    Installation in Areas of High Salinity 10.1 Caution Do not install outdoor units where they could be directly exposed to sea air. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance. Outdoor units installed in seaside locations should be placed such as to avoid direct exposure to the sea air and additional anticorrosion treatment options should be selected, otherwise the service life of the outdoor units will be seriously affected.

  • Page 32: Pre-Commissioning Checks

    Commissioning 11.1 Pre-commissioning Checks Before turning on the power to the indoor and outdoor units, ensure the following: 1. All indoor and outdoor refrigeration piping and communication wiring has been connected to the correct refrigeration system and the system to which each indoor and outdoor unit belongs is clearly marked on each unit or recorded in some other suitable place.
  • Page 33 0-9 on ENC1 indicate 16-25 indoor units; A-F on ENC1 indicate 26-31 indoor units indoor units The number of indoor units is in the range 16-31 Number of The number of indoor units is in the range 16-31 ENC3 0-9 on ENC1 indicate 16-25 indoor units; A-F on ENC1 indicate 26-31 indoor units The number of indoor units is in the range 16-31 0-9 on ENC1 indicate 16-25 indoor units;...
  • Page 34 There are five priority mode options: 1. Auto priority mode (default): In auto priority mode, the outdoor unit will operate in heating priority mode or cooling priority mode according to the outdoor ambient temperature. a. When the outdoor ambient temperature is below 13ºC, the outdoor units run in heating priority mode.
  • Page 35 3. First on priority mode: The outdoor unit operates in the mode of the first on indoor unit is being requested. Indoor units that are in a mode different to the first on unit display the mode conflict error. 4. Heating only mode: The outdoor unit only operates in heating mode. Indoor units requesting heating operate in heating mode.

  • Page 36: Error Code Table

    12 Error Code Table Error Remarks Manual restart Content code required Phase sequence error Displayed on the outdoor unit PCB Communication error between indoor and Displayed on the outdoor unit PCB outdoor units Outdoor heat exchanger temperature sensor (T3) Displayed on the outdoor unit PCB error or outdoor ambient temperature sensor (T4) error Abnormal power supply voltage...
  • Page 40 FAX +31 (0)598 624584 TELEFAX +49 (0)2822 97728-10 info@mark.nl info@mark.de www.mark.nl www.mark.de MARK EIRE BV MARK POLSKA Sp. z o.o COOLEA, MACROOM UL. JASNOGÓRSKA 27 CO. CORK 42-202 CZĘSTOCHOWA (POLSKA) P12 W660 (IRELAND) PHONE +48 34 3683443 PHONE +353 (0)26 45334...

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