Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual
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Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual

90–315 kw d-frame
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See also: Programming Manual , Operating Instructions Manual
MAKING MODERN LIVING POSSIBLE
Operating Instructions
VLT® AutomationDrive FC 302
90–315 kW D-Frame
vlt-drives.danfoss.com

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  • Page 1 MAKING MODERN LIVING POSSIBLE Operating Instructions VLT® AutomationDrive FC 302 90–315 kW D-Frame vlt-drives.danfoss.com...

  • Page 3: Table Of Contents

    4.8.4 Voltage/Current Input Selection (Switches) 4.8.5 Safe Torque Off (STO) 4.8.6 RS485 Serial Communication 4.9 Installation Check List 5 Commissioning 5.1 Safety Instructions 5.2 Applying Power 5.3 Local Control Panel Operation 5.4 Basic Programming MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 4 8.5 Cable Specifications 8.6 Control Input/Output and Control Data 8.7 Fuses 8.8 Connection Tightening Torques 8.9 Power Ratings, Weight and Dimensions 9 Appendix 9.1 Symbols, Abbreviations, and Conventions 9.2 Parameter Menu Structure Index Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 5: Introduction

    This manual is regularly reviewed and updated. All suggestions for improvement are welcome. Table 1.1 shows the document version and the corresponding software version. Edition Remarks Software version MG34U4xx Replaces MG34U3xx 7.42 Table 1.1 Document and Software Version MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 6 NEMA 1/12) heater 13 (IP 20/Chassis) Illustration 1.1 D1 Interior Components Illustration 1.2 Close-up View: LCP and Control Functions NOTICE For location of TB6 (terminal block for contactor), see chapter 4.6 Motor Connection. Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 7 (to de-energise the frequency converter) and remove the cover of the options cabinet. For frequency converters purchased with a disconnect, contactor or circuit breaker, the nameplate label includes a type code for a replacement that does not include the MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 8: Approvals And Certifications

    Raise the power factor More approvals and certifications are available. Contact the reflected back to the line. local Danfoss partner. Frequency converters of enclosure • Reduce harmonics on the AC type T7 (525–690 V) are UL certified for only 525–600 V.

  • Page 9: Safety

    3x400 90–250 • Only qualified personnel must perform instal- 3x400 110–315 lation, start-up, and maintenance. 3x500 110–315 3x500 132–355 3x525 55–250 3x525 90–315 3x690 55–250 3x690 110–315 Table 2.1 Discharge Time MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 10 An internal failure in the frequency converter can result in serious injury, when the frequency converter is not properly closed. • Ensure that all safety covers are in place and securely fastened before applying power. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 11: Mechanical Installation

    Retain damaged parts are met. for clarification. Voltage [V] Altitude restrictions Automation Drive www.danfoss.com 380–500 At altitudes above 3000 m, contact Danfoss regarding PELV T/C: FC-302PK37T2E20H1BGXXXXSXXXXA6BKC4XXXD0 525–690 At altitudes above 2000 m, contact Danfoss P/N: 131X3537 S/N: 010122G430 regarding PELV 0.37kW/ 0.50HP...
  • Page 12 Always lift the frequency converter using the dedicated Ensure the access to open the door. lifting eyes. Use a bar to avoid bending the lifting holes. Ensure the cable entry from the bottom. Illustration 3.2 Recommended Lifting Method Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 13: Electrical Installation

    POTENTIAL EQUALISATION Risk of electrical interference, when the ground potential between the frequency converter and the control system is different. Install equalising cables between the system components. Recommended cable cross-section: 16 mm MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 14: Wiring Schematic

    *Terminal 37 (optional) is used for Safe Torque Off. For Safe Torque Off installation instructions, refer to the Safe Torque Off ® Operating Instructions for Danfoss VLT Frequency Converters. **Do not connect cable screen. Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 15 Failure to isolate power, motor and control cables can result in unintended behaviour or reduced performance. Minimum 200 mm (7.9 in) clearance between mains input, motor and control cables is required. MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 16: Access

    IP21 (NEMA1/12) and higher units. • Do not wire a starting or pole-changing device (for example Dahlander motor or slip ring induction motor) between the frequency converter and the motor. Illustration 4.3 Motor Connection Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 17 SECTION A-A MOTOR TERMINALS AND MAINS TERMINALS BRAKE TERMINALS MAINS TERMINAL MOTOR TERMINAL 331.2 211.1 GROUND 168.4 168.4 GROUND GROUND 143.4 143.4 GROUND 4X M10x20 STUD WITH NUT Illustration 4.5 Terminal Locations, D2h MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 18 MOTOR TERMINALS AND BRAKE BRAKE TERMINALS BRAKE TERMINAL 11.5 MAINS TERMINAL MOTOR TERMINAL Illustration 4.6 Terminal Locations, D3h [2.0] [3.9] [7.5] [3.0] Front view Side view Illustration 4.7 Loadshare and Regeneration Terminals, D3h Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 19 TERMINALS BRAKE / REGEN TERMINAL MAINS TERMINAL 14.8 12.6 MOTOR TERMINAL Illustration 4.8 Terminal Locations, D4h [3.7] [4.9] [3.0] [7.5] Front view Side view Illustration 4.9 Load Share and Regeneration Terminals, D4h MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 20 Electrical Installation VLT® AutomationDrive FC 302 9 [ ] 0 [ ] Mains terminals Brake terminals Motor terminals Earth/ground terminals Illustration 4.10 Terminal Locations, D5h with Disconnect Option Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 21 Electrical Installation Operating Instructions 28.6 24.5 20.4 20.1 0 [ ] Mains terminals Brake terminals Motor terminals Earth/ground terminals Illustration 4.11 Terminal Locations, D5h with Brake Option MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 22 MAINS SIDE CABLE ENTRY 25.83 33.8 [1.3] 17.5 [8.8] [0.4] [0.6] [0.4] [0.7] 34.5 10.3 16.5 [1.4] [0.4] [1.2] 50.5 [0.7] 67.5 BOTTOM VIEW [2.7] [4.4] Illustration 4.12 Oversized Wiring Cabinet, D5h Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 23 Electrical Installation Operating Instructions 18.0 Mains terminals TB6 terminal block for contactor Brake terminals Motor terminals Earth/ground terminals Illustration 4.13 Terminal Locations, D6h with Contactor Option MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 24 Electrical Installation VLT® AutomationDrive FC 302 Brake terminals TB6 terminal block for contactor Motor terminals Earth/ground terminals Mains terminals Illustration 4.14 Terminal Locations, D6h with Contactor and Disconnect Options Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 25 Electrical Installation Operating Instructions 18.4 Mains terminals Brake terminals Motor terminals Earth/ground terminals Illustration 4.15 Terminal Locations, D6h with Circuit Breaker Option MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 26 Electrical Installation VLT® AutomationDrive FC 302 21.4 20.3 16.2 15.6 14.7 0 [ ] Mains terminals Motor terminals Earth/ground terminals Brake terminals Illustration 4.16 Terminal Locations, D7h with Disconnect Option Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 27 Electrical Installation Operating Instructions 1260 49.6 1202 47.3 1082 42.6 1034 40.7 1009 39.7 0 [ ] Mains terminals Brake terminals Motor terminals Earth/ground terminals Illustration 4.17 Terminal Locations, D7h with Brake Option MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 28 CABLE ENTRY CABLE ENTRY [6.6] 33.8 25.3 [1.7] [1.3] 17.5 [0.6] [0.7] [0.6] [8.7] [0.4] 34.5 16.5 10.3 [1.4] [0.7] [0.4] [1.2] 67.5 50.5 117.1 [4.6] Illustration 4.18 Oversized Wiring Cabinet, D7h Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 29 16.5 15.8 14.9 0 [ ] 1 TB6 terminal block for contactor 4 Brake terminals 2 Motor terminals 5 Mains terminals 3 Earth/ground terminals Illustration 4.19 Terminal Locations, D8h with Contactor Option MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 30 VLT® AutomationDrive FC 302 22.3 1 TB6 terminal block for contactor 4 Motor terminals 2 Mains terminals 5 Earth/ground terminals 3 Brake terminals Illustration 4.20 Terminal Locations, D8h with Contactor and Disconnect Options Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 31 Electrical Installation Operating Instructions 23.8 1 Mains terminals 3 Motor terminals 2 Brake terminals 4 Earth/ground terminals Illustration 4.21 Terminal Locations, D8h with Circuit Breaker Option MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 32: Ac Mains Connection

    14-50 RFI Filter is set to [0] Off to avoid damage to the intermediate circuit and to reduce ground capacity currents. Mains connection (R, S, T) Motor connection (U, V, W) Illustration 4.22 Connecting to AC Mains Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 33: Control Wiring

    Connector 3 provides 2 analog inputs, 1 analog output, 10 V DC supply voltage, and commons for the inputs and output. • Connector 4 is a USB port available for use with the MCT 10 Set-up Software. MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 34: Wiring To Control Terminals

    16-63 Terminal 54 Switch Setting). NOTICE Keep control wires as short as possible and separate NOTICE from high power cables to minimise interference. Disconnect power to the frequency converter before changing switch positions. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 35: Safe Torque Off (Sto)

    See the option card documentation for installation and operation instructions. Connect RS485 serial communication wiring to terminals (+)68 and (-)69. • Use screened serial communication cable (recommended). • See chapter 4.3 Grounding for proper grounding. MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 36: Installation Check List

    POTENTIAL HAZARD IN THE EVENT OF INTERNAL FAILURE Risk of personal injury if the frequency converter is not properly closed. • Before applying power, ensure all safety covers are in place and securely fastened. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 37: Commissioning

    Confirm that the input voltage is balanced within 3%. If not, correct the input voltage imbalance before proceeding. Repeat this procedure after the voltage correction. Ensure that any optional equipment wiring, matches the installation application. MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 38 0-20 Speed [RPM] 0-21 Motor Current Table 5.4 Legend to Illustration 5.1, Indicator Lights (LEDs) 0-22 Power [kW] 0-23 Frequency 0-24 Reference [%] Table 5.1 Legend to Illustration 5.1, Display Area Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 39 Press [OK]. A progress bar shows the uploading or downloading progress. Press [Hand On] or [Auto On] to return to normal operation. MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 40: Basic Programming

    If a jumper wire is in place between control terminals 12 and 27, leave parameter 5-12 Terminal 27 Digital Input at factory default. Otherwise, select No Operation in parameter 5-12 Terminal 27 Digital Input. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 41: Checking Motor Rotation

    Press [Off]. Note any deceleration problems. In the event of acceleration or deceleration problems, see chapter 7.6 Troubleshooting. See chapter 7.5 List of Warnings and Alarms for resetting the frequency converter after a trip. MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 42: Application Set-Up Examples

    * = Default Value A IN Notes/comments: D IN 37 is an option. A OUT -10 - +10V Table 6.1 AMA with T27 connected U - I Table 6.3 Analog Speed Reference (Voltage) Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 43 * = Default Value Speed down ( 32 ) A IN Notes/comments: D IN 37 is an option. A OUT Illustration 6.1 Speed Up/Down U - I Table 6.5 Speed Reference (Using a Manual Potentiometer) MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 44 Table 6.8 Pulse Start/Stop Table 6.7 Start/Stop Command with Safe Stop Option Speed Speed Latched Start (18) Start (18) Stop Inverse (27) Illustration 6.2 Start/Stop Command with Safe Stop Illustration 6.3 Latched Start/Stop Inverse Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 45 Use only thermistors with reinforced or double D IN insulation to meet PELV insulation D IN requirements. D IN D IN +10 V A IN A IN A OUT Table 6.10 External Alarm Reset MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 46 5 s, the frequency converter continues and the warning disappears. But relay 1 is still triggered until pressing [Reset] on the LCP. Table 6.13 Using SLC to Set a Relay Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 47 Notes/comments: Table 6.14 Mechanical Brake Control (Open Loop) 1-76 Current Speed Time 1-71 2-21 1-71 2-21 Start (18) Start reversing (19) Relay output Open Closed Illustration 6.4 Mechanical Brake Control (Open Loop) MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 48: Maintenance, Diagnostics And Troubleshooting

    There are 5 or 9 screws depending on the size of the frequency converter. Reinstall in reverse order of this procedure and tighten fasteners according to chapter 8.8 Connection Tightening Torques. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 49: Status Messages

    Parameter 2-16 AC brake Max. Current was feedback limit set in parameter 4-56 Warning selected in parameter 2-10 Brake Function. The Feedback Low. AC brake overmagnetises the motor to achieve a controlled slow-down. MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 50 Mains supply to the frequency converter was motor starts in forward or reverse direction removed, and the control card is supplied by depending on which corresponding terminal is the external 24 V. activated. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 51: Warning And Alarm Types

    • Remove the wiring from terminal 50. If the frequency converter. warning clears, the problem is with the wiring. If the warning does not clear, replace the control card. MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 52 If an external fan is in use, check that it is • Activate the functions in parameter 2-10 Brake selected in parameter 1-91 Motor External Fan. Function. • Running AMA in parameter 1-29 Automatic Motor Adaptation (AMA) tunes the frequency converter Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 53 If extended mechanical brake control is selected, a trip can There is short-circuiting in the motor or motor wiring. be reset externally. Troubleshooting • Remove the power to the frequency converter and repair the short circuit. MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 54 The fan warning ALARM 31, Motor phase V missing can be disabled in parameter 14-53 Fan Monitor ([0] Motor phase V between the frequency converter and the Disabled). motor is missing. Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 55 Danfoss Service Department. • Check for loose or missing wiring. Table 7.4 Internal Fault Codes It may be necessary to contact the Danfoss supplier or service department. Note the code number for further ALARM 39, Heat sink sensor troubleshooting directions.
  • Page 56 14-80 Option Supplied by External 24VDC, [0] No. ALARM 50, AMA calibration failed A change in parameter 14-80 Option Supplied by External Contact the Danfoss supplier or Danfoss Service 24VDC requires a power cycle. Department. ALARM 45, Earth fault 2...
  • Page 57 The control card and power card are incompatible. To The output frequency has reached the value set in check compatibility, contact the Danfoss supplier with the parameter 4-19 Max Output Frequency. Check the type code of the unit from the nameplate and the part application for possible causes.
  • Page 58 F14 or F15. KTY sensor is connected to analog input terminal 54. 5 = Rectifier module. ALARM 99, Locked rotor 6 = Right rectifier module in enclosure sizes F14 Rotor is blocked. or F15. Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 59 Reset to remove the warning and resume normal operation. WARNING 250, New spare part A component in the frequency converter has been replaced. Troubleshooting • Reset the frequency converter for normal operation. MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 60: Troubleshooting

    Check if a reversing command is programmed running in Active reversing signal. for the terminal in parameter group 5-1* Deactivate reversing signal. wrong Digital inputs. direction Wrong motor phase See chapter 5.5 Checking Motor Rotation. connection. Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 61 3-42 Ramp 1 Ramp Down Time. chapter 7.5 List of Warnings and Alarms. deceleration incorrectly. Enable overvoltage control in Check that motor data are entered correctly. problems parameter 2-17 Over-voltage Control. Table 7.5 Troubleshooting MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 62: Specifications

    0–590 Hz Heatsink overtemperature trip 110 °C Control card ambient trip 75 °C *High overload=150% current for 60 s, Normal overload=110% current for 60 s. Table 8.1 Mains Supply 3x380–500 V AC Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 63: Mains Supply 3X525-690 V Ac

    0–590 Hz Heatsink overtemperature trip 110 °C Control card ambient trip 75 °C *High overload=150% current for 60 s, Normal overload=110% current for 60 s. Table 8.2 Mains Supply 3x525–690 V AC MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 64 1) Applies for dimensioning of frequency converter cooling. If the switching frequency is higher than the default setting, the power losses may increase. LCP and typical control card power consumptions are included. For power loss data according to EN 50598-2, refer to www.danfoss.com/ vltenergyefficiency.

  • Page 65: Mains Supply

    55 °C - with derating maximum 50 °C - with full output power of typical EFF2 motors (up to 90% output current) maximum 45 °C - at full continuous FC output current MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 66: Cable Specifications

    Voltage mode Switch A53/A54=(U) Voltage level -10 V to +10 V (scaleable) Input resistance, R approximately 10 kΩ Maximum voltage ±20 V Current mode Switch A53/A54=(I) Current level 0/4 to 20 mA (scaleable) Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 67 Maximum capacitive load at frequency output 10 nF Minimum output frequency at frequency output 0 Hz Maximum output frequency at frequency output 32 kHz Accuracy of frequency output Maximum error: 0.1 % of full scale MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 68 1:100 of synchronous speed 30–4000 RPM: Maximum error of ±8 RPM Speed accuracy (open loop) All control characteristics are based on a 4-pole asynchronous motor Control card performance Scan interval 5 ms Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 69: Fuses

    31.550 N200 170M4016 LA50QS600-4 L50S-600 FWH-600A 20 610 A50QS600-4 6,9URD31D08A0630 A070URD31KI0630 31.630 N250 170M4017 LA50QS800-4 L50S-800 FWH-800A 20 610 A50QS800-4 6,9URD32D08A0800 A070URD31KI0800 31.800 Table 8.6 Fuse Options for 380–500 V Frequency Converters MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 70 450 A max fuse size for D6h and 900 A max fuse size for D8h. 2) Must use Class J or L branch fuses for UL approval. 450 A max fuse size for D6h and 600 A max fuse size for D8h. Danfoss A/S © 06/2015 All rights reserved. MG34U402...

  • Page 71: Connection Tightening Torques

    [mm (inch)] Depth 381 (15) 381 (15) 386 (15) 406 (16) Maximum weight [kg (lb)] 449 (990) 449 (990) 530 (1168) 530 (1168) Table 8.12 Power Ratings, Weight, and Dimensions, Enclosure Size D5h-D8h MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 72: Appendix

    Table 9.1 Symbols and Abbreviations Conventions Numbered lists indicate procedures. Bullet lists indicate other information. Italicised text indicates: • Cross reference • Link • Parameter name All dimensions are in [mm]. 9.2 Parameter Menu Structure Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 73 Appendix Operating Instructions MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 74 Appendix VLT® AutomationDrive FC 302 Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 75 Appendix Operating Instructions MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 76 Appendix VLT® AutomationDrive FC 302 Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 77 Appendix Operating Instructions MG34U402 Danfoss A/S © 06/2015 All rights reserved.

  • Page 78: Index

    Feedback................32, 34, 47, 53 Closed loop..................... 32 Floating delta..................30 Communication option..............53 FLUX......................45 Conduct....................34 Fuse..................11, 34, 53, 67 Control card....................... 50 word time-out................... 52 Ground connection................34 Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 79 Parameter menu structure..............71 Main menu....................36 PELV....................43, 66 Mains supply (L1, L2, L3)..............63 Phase loss....................50 Mains voltage.................. 36, 47 Potential equalisation................. 11 Maintenance..................46 Power connection................11 Manual initialisation................38 MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 80 Weight...................... 69 Speed reference............... 32, 39, 40, 47 Windmilling....................8 Speed reference, analog..............40 Wire size.................... 11, 14 Start/stop command................42 Start-up....................38 Status display..................47 Status mode................... 47 STO......................33 Storage......................9 Danfoss A/S © 06/2015 All rights reserved. MG34U402...
  • Page 81 Index Operating Instructions MG34U402 Danfoss A/S © 06/2015 All rights reserved.
  • Page 82 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies.

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