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ProNordic
L270R
INSTALLATION AND MAINTENANCE INSTRUCTION
Air handling unit
118227EN-01
2022-10
ART.NR. 153200
INSTALLATION
INSTRUCTIONS

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Summary of Contents for Flexit ProNordic L270R

  • Page 1 118227EN-01 2022-10 ProNordic L270R ART.NR. 153200 INSTALLATION AND MAINTENANCE INSTRUCTION Air handling unit INSTALLATION INSTRUCTIONS...
  • Page 2 L 2 7 0 R Symbols used These products bear a number of symbols used for labelling the actual product and in installation and user documentation. Supply air Extract air DANGER! DANGER! ELECTRICITY DO NOT TOUCH Exhaust air Outdoor air EXAMPLE OF NIPPLE LOCATIONS EXAMPLE OF NIPPLE LOCATIONS (shown as a right model)
  • Page 3: Safety Instruction

    118539 wiring diagram • The unit must not be operated For spare parts, see www.flexit.com without the filters being in place. • All plumbing work must be carried out by an authorised plumber.
  • Page 4 L 2 7 0 R Our products are subject to continuous development and we therefore reserve the right to make changes. We also disclaim liability for any printing errors that may occur.
  • Page 5: Table Of Contents

    Contents Items included ......................6 Inward transport ......................7 2.1. Transport using lifting straps ................7 2.2. Transport using pallet truck ................7 2.3. Operating the door locks ..................8 2.4. If a door needs to be removed ................8 ..................9 Assembly ........................12 Connection of sensors ....................15 5.1.
  • Page 6: Items Included

    L 2 7 0 R Items included 118227 - installation and maintenance instructions 118076 - automatic control manual 118109 - wiring diagram...
  • Page 7: Inward Transport

    Inward transport 2.1. Transport using lifting straps The unit must must be stored in a dry environment to avoid damage to the electronics. Unit and control cabinet are always to be locked. 2.2. Transport using pallet truck < 1700mm > 1700mm L 2 7 0 R...
  • Page 8: Operating The Door Locks

    L 2 7 0 R 2.3. Operating the door locks Unit and control cabinet are always to be locked. UNLOCKED LOCKED 2.4. If a door needs to be removed The dimensions and component weights for each individual model, see chap. 9. Referance data page 22.
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  • Page 12: Assembly

    L 2 7 0 R Assembly The unit must be placed in a dry location protected from the weather. INFO! The space required for the servicing of the model is described in chap. 9.2. Space requirements page 22. must should...
  • Page 13 Duct Insulation Support required. Outdoor air and exhaust ducts The unit cannot support the must be insulated to avoid con- weight. densation. If the unit is in a cold location, the supply air and extract air ducts must also be insulated. Electrical power connection Any cable tray must be connected with vibration...
  • Page 14 L 2 7 0 R Ceiling Hovedlydfelle Main sound insulation Bør plasseres i nærheten av Should be positioned close aggregat. to the unit. Wall Dukstusser Fabric bosses Forhindrer overføring av støy. Prevents transmission of noise. Technical room Distance to wall Floor The unit should be placed in Risk of the transmission of...
  • Page 15: Connection Of Sensors

    The sensors must not be positioned in, or in the vicinity of a duct bend. L 2 7 0 R...
  • Page 16: Supply Air Sensor (B1)

    L 2 7 0 R 5.1. Supply air sensor (B1) INFO! Refer to the separate connection instructions on the inside of the sensor box. 5.2. Outdoor air sensor (B4) and extract air sensor (B3) 65mm Ø10mm Ø2,5mm...
  • Page 17: Electrical Work

    3 mm switching distance. This is not part of the supply from Flexit. 6.1. Main supply (mains cable) See chap. 14. Technical data page 29 for dimensions of fuses and connection cables. See also chap. 7. Main connection page 18 for more information about connection to 3N~400 V versus 3~230 V.
  • Page 18: Main Connection

    L 2 7 0 R Main connection The F2 fuse is a glass fuse, 6.3A, 250V. Incoming electrical cables are connected to the terminal The main fuse is a miniature circuit breaker of type below, which is adapted to the relevant mains network. MCB C10 3P 10 kA.
  • Page 19: Commissioning

    The unit must not be started until all documentation has been studied and all electrical fitting and plumbing work has been performed. Refer to guideline 118076 for more information on start up and use of the control system. Familiarise yourself well with the documentation for the automatic control system Check that the network settings are correct.
  • Page 20: Adjustment Of Throttle Dampers

    L 2 7 0 R 8.1. Adjustment of throttle dampers Adjust the pressure balance over the rotor To set the correct pressure balance over the rotor and minimise the risk of leakage between extract air and prevent extract air from leaking over to the supply air via the rotor.
  • Page 21 Connect the pressure gauge with the –hose to A (blue hose in the unit) and the +hose to B (red hose in the unit). Run the unit at the correct operating point for the system in question. The negative pressure in the extract air part must be 0–20Pa higher than in the supply air part (the instrument must display negative pressure).
  • Page 22: Referance Data

    L 2 7 0 R 9.1. Weight Gross unit weight Heat recovery system Doors Net inward transport 361 kg 2 x 19 kg 78 kg 4 x 17 kg 177 kg 9.2. Space requirements This is a minimum requirement that only relates to space for service needs.
  • Page 23: General Drawing

    No. Abbreviation Description Supply air fan Extract air fan HR-R Rotary wheel-type heat exchanger Heating battery, water Heating battery, electrical L 2 7 0 R...
  • Page 24: System Drawing

    L 2 7 0 R Abbreviation Description Abbreviation Description Supply air fan Overheating thermostat, manual reset Extract air fan Overheating thermostat, automatic reset Rotor motor Exhaust air damper Outdoor air damper Damper, pressure equalisation HR-R Rotary wheel-type heat exchanger Heating battery, water Supply air fan pressure relay Heating battery, electrical Supply air external pressure sensor...
  • Page 25: Dimensioned Drawing

    Dimensions in mm. 1215 1100* 1700 *without door water connection points 1000 The dimensions are the same on both end sides. L 2 7 0 R...
  • Page 26: Maintenance

    L 2 7 0 R 13. Maintenance If a water battery is used to heat the air, check the system for water 13.1. General maintenance leaks. All electrical power to the unit must be shut off before carrying out Listen for abnormal sounds and service or maintenance.
  • Page 27 Component Action Interval Rotor Where required clean the rotor. If it should however be necessary, dust can be removed with a soft brush. Further cleaning is possible by removing the rotor, spraying it with a grease solvent and then blowing it clean from the opposite side. Distance approximately 60 mm and max. pressure are intact and tight.
  • Page 28 L 2 7 0 R 13.2. 1-2 times a year UNLOCKED LOCKED...
  • Page 29: Technical Data

    1 335 mm Depth (without doors) 1 100 mm 1 100 mm ProNordic L270R: K factor for supply air fan: 152,2 K factor for extract air fan: 143,1 K factor for extract air fan (top oulet): 142,9 L 2 7 0 R...
  • Page 30: Capacity And Sound Data

    L 2 7 0 R 15. Capacity and sound data For control and calculation of SFTINT and SFPLimit use FlexitSelect. Lw(A) is below 70 dB(A). 15.1. Supply air side 1100 SFP < 1,0 1400 2000 1800 1200 1600 100% 1000 1400 1200 1000...
  • Page 31: Correction Factor For Lw

    Using the capacity diagram: 1. Capacity curves (blue) 4. Sound curves (red) These curves show the total available pressure and the These curves indicate values for the sound power level the sound power level of the duct in the various octave /h at the bottom of the diagram and in l/s at the top of the diagram.
  • Page 32: Complaints

    L 2 7 0 R 16. Complaints Warranty claims will only be valid if the instructions in the manuals have been followed. This product is covered by warranty in accordance with the current terms of sale, provided that the product is used correctly and properly maintained.
  • Page 33: Ce Declaration Of Conformity

    2009/125/EC Ecodesign Directive Our products have been tested in accordance with parts of: 1253/2014/EC Ecodesign Regulation Producer: FLEXIT AS, Televeien 15, 1870 Ørje, Norway Type: ProNordic L270R Ventilation Unit Compliance with valid versions of the following standards on the date on which the declaration of...
  • Page 34: Product And Environmental Declaration

    L 2 7 0 R 19. Product and Environmental Declaration Materials: Materials with which the user or treated air come into contact: • steel. • The rotary wheel-type heat exchanger is made of aluminium. • Miscellaneous electric cables with PVC insulation. •...
  • Page 35 L 2 7 0 R...
  • Page 36 The product is listed in the database for building products that can be used in Nordic Swan Ecolabelled buildings. Flexit AS, Moseveien 8, N-1870 Ørje www.flexit.no...