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Danfoss VLT 3500 HVAC Manual

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MG.35.B1.02 - VLT is a registered Danfoss trademark
Section 1
Section 2
Section 3
Section 4
VLT
®
3500 HVAC
1.1 Safety warnings ............................................... 2
1.2 Literature description ....................................... 3
®
3500 HVAC .................... 4
2.1 Installation related product data ...................... 5
®
2.3 Machanical installation .................................. 10
2.4 Electrical installation ...................................... 13
2.5 CE-labelling ................................................... 17
2.6 EMC-correct installation ................................ 19
2.7 Installation examples ..................................... 24
3.1 Display and keypad ....................................... 33
3.3 Parameter overview ....................................... 39
3.5.1 PID-controller .............................................. 47
4.1 Status messages ........................................... 75
4.2 Warnings ....................................................... 76
4.3 Alarm messages ............................................ 77
4.4 Fault messages ............................................. 78
4.5 Special conditions ......................................... 80
4.6 EMC test results ............................................ 82
4.7 Factory settings ............................................. 85
4.8 Customer parameter setting .......................... 88
Index ..................................................................... 89
3500 HVAC ................... 8
1

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Summary of Contents for Danfoss VLT 3500 HVAC

  • Page 1: Table Of Contents

    4.3 Alarm messages ..........77 4.4 Fault messages ..........78 4.5 Special conditions ......... 80 4.6 EMC test results ..........82 4.7 Factory settings ..........85 4.8 Customer parameter setting ......88 Index ..............89 MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 2: Product Introduction

    Touching the electrical parts may be fatal - even after the equipment has been disconnected from mains. Using VLT 3502-3562 HVAC: wait 4 minutes Using VLT 3542-3562 (230 V) HVAC: wait 14 minutes Using VLT 3575-3800 HVAC: wait 14 minutes MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 3: Literature Description

    This manual is a tool for installation and programming the VLT 3500 HVAC frequency converters. HVAC stands for Heating Ventilation Air-Conditioning. This manual is valid for all VLT 3500 HVAC units with software version 3.0 and version 3.11. The unit size and voltage is automatically identified when VLT 3500 HVAC is started...

  • Page 4: Principle Of The Vlt 3500 Hvac

    Selection of options and accessories Danfoss offers a wide range of options and accessories In order to obtain satisfactory operation of the for the VLT 3500 HVAC. For additional information please frequency converter it is highly important to select contact Danfoss.

  • Page 5: Mechanical And Electrical Installation

    In the range -10 to 0°C, the equipment can start and run; however, the display values and certain operating characteristics will not fulfil the specifications. Bussmann rapid type JJS integrated. If mains contactors are used, the following Danfoss types are recommended: Max. ambient temperature + 40°C MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 6 In the range -10 to 0°C, the equipment can start and run; however, the display values and certain operating characteristics will not fulfil the specifications. Bussmann rapid type JJS integrated. If mains contactors are used, the following Danfoss types are recommended: Max. ambient temperature +40°C VLT 3502-3505 fswitch > 4,5 kHz; max. 40 m motor cable.
  • Page 7 In the range -10 to 0°C, the equipment can start and run; however, the display values and certain operating characteristics will not fulfil the specifications. Bussmann rapid type JJS integrated. If mains contactors are used, the following Danfoss types are recommended: Max. ambient temperature +40°C MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 8: Cabinet Sizes Of Vlt 3500 Hvac

    308 296 IP 54 400 280 70 690 3562 IP 20 308 296 IP 54 400 280 70 690 * Only for 380 - 415 V ** Only for 440 - 500 V MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 9 Please note that the door opens to the left, while the option door opens to the right. Type C cabinet MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 10: Machanical Installation

    The base must be fastened to the floor by means of 4 bolts before installing the frequency con- VLT 3500 HVAC can be installed with the flanges side by verter. Unscrew the front plate of the base to fasten side.
  • Page 11 (t ) and its outlet temperature (t ∆t= 45° C-t The bases for VLT 3500 HVAC and options have been updated to fit VLT 3625-3800 with its detachable 3. Calculate the required bottom plate. Please note that the ventilation slits ΣP...
  • Page 12 Model 3625-3700 3750-3800 The sidewards distance to the next VLT 3500 HVAC must be 130 mm to allow the base to take in air at the side. VLT type 3575-3800 HVAC has a fan in the front door which cools down the internal components.

  • Page 13: Electrical Installation

    An earth fault can introduce a DC current in the dis- charge current. If FI relays are used, local regulations must be complied with. The relays must be suitable for protecting 3-phase equipment with bridge rectifier and a short discharge on power-up. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 14 VLT 3750-3800 Motor connection All types of three-phase asynchronous standard mo- tors can be used together with VLT 3500 HVAC. In general, smaller motors (220/380 V, ∆/ Y) are star- connected. Larger motors (380/660 V, ∆/ Y) are delta- connected.
  • Page 15 3575 - 3800 HVAC, 380/500 V 3542 - 3562 HVAC, 230 V Parallel connection of motors VLT 3500 HVAC can control several motors connec- ted in parallel. If the motor speeds are to be different, motors of different rated speeds must be used. The...
  • Page 16 *) In UL versions: Max. 240 V AC, 2A. NB: If a thermistor is used for motor protection, it must be wired from terminal 50 to terminal 16 (see description of choice in parameter 400). MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 17: Ce-Labelling

    This frequency converter On this basis a conformity declaration is issued in must be CE-labelled in accordance with the EMC accordance with the EMC directive. directive. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 18 As an aid to the installer, Danfoss has prepared EMC in- stallation guidelines for the Power Drive System. The If cable jaws are used, sensitive signal cables are not to...

  • Page 19: Emc-Correct Installation

    In those cases where the screen is to be connected of the motor cable - together with a high du/dt from to a mounting plate for VLT 3500 HVAC, the mounting the motor voltage - generates noise. plate must be made of metal, because the screen currents are to be taken back to the unit.
  • Page 20 (230V) rate module/option. See product range. 1. Remove the access plate and the Philips screws in the right-hand side of the VLT 3500 HVAC (save the VLT 3575-3800 and 3542-3562 (230 V) screws for the access plate for later use).
  • Page 21 They can be avoided by making a tight fit with the cabinet chassis rear plate, thereby ensuring that any equalising currents will run via the chassis rear plates and their joints, not via the cable screens. VLT 3502-3511 MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 22 ® 3500 HVAC VLT 3516-3562 VLT 3575-3800 and VLT 3542-3562, 230 V MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 23 Section 3 Section 3 Section 4 Section 4 Section 4 Section 4 Section 4 Section 2 Section 2 Section 2 Section 2 Section 2 Section 3 Section 3 Section 3 Section 1 Section 1 Section 1 Section 1 Section 1 2.6 EMC correct installation...

  • Page 24: Installation Examples

    (parameters 104, 105 and 107) (or the Quick Set-up menu items 1, 2 and 3) are to be adjusted to the motor connected. 1 = Start/Stop 2 = 1 K Ω potentiometer MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 25 1 = Start/Stop 2 = Reversing 3 = 4-20 mA 4 = 4-20 mA The following must be programmed: Function Parameter no. Parameter value Data value no. = 4-20 mA [20] Reference 4-20 mA MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 26 1 = Start/Stop 2 = Thermistor 3 = 1 k Ω Potentiometer The following must be programmed: Function Parameter no. Parameter value Data value no. Thermistor on terminal 16 THERMISTOR MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 27 4 = 0-10 V control signal (0-100% speed) The following must be programmed: Function Parameter no. Parameter value Data value no. STOP STOP START LATCH START 0-20 mA [25] Reference 0-10 V DC MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 28 Data value no. Speed up FREEZE REF. and down Speed up SPEED UP/DOWN and down Frequency warning OUT FREQ RGE [11] on relay Frequency too low 10 Hz Frequency too high 45 Hz MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 29 Digital reference 2 Digital reference 3 "1" means that 24 V DC is connected to the terminal. Digital reference 4 Set-up 2 Max. frequency 60 Hz Digital reference 1 Digital reference 2 100% MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 30 VLT 3500 HVAC. the pressure drops. (Digital reference = 50%). The min. speed must be 10 Hz and the max.
  • Page 31 0-50°C 4-20 mA. In order to carry The selected temperature must be kept constant, and out inverse regulation, VLT 3500 HVAC is program- the internal PID regulator is to be used. The regulation med to convert the temperature transmitter signal (4- required is of the inversed type;...
  • Page 32 VLT 3500 HVAC, external switching between hand "Hand-Off-Auto". The "Hand" reference is a 0-10 V operation "Hand" and remote operation "Auto" on the signal on a potentiometer. When VLT 3500 HVAC runs frequency converter is required. in the Auto mode, the frequency converter is control- led using a 4-20 mA reference.

  • Page 33: Operation And Programming

    Local Mode. two light diodes, which indicate: The key can be de-activated in parameter 010, green (On): VLT 3500 HVAC is connected to see page 41. supply mains red (Alarm): in case of an alarm.
  • Page 34 Quick Set-up Menu from any Mode. The combination of "Menu" with the "+" and "-" keys must be activated simul- taneously to avoid unwanted leaps to other Modes. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 35 Display Mode In parameter 605, see page 74, it is possible to pro- In normal operation, VLT 3500 HVAC starts up in the gramme a different display layout, in which 2 different Display Mode, in which there is an option of choosing read-outs can be defined at the same time.
  • Page 36 Quick Set-up Data Mode Flashing, selected data value ENGLISH Parameter name LANGUAGE Quick Set-up Menu number Extended Menu Ex. of display read- 0.0Hz out incl. unit 0..OPERATION Flashing group AND DISPLAY number Data value MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 37 If the display reads LOCKED, the mains supply to VLT ter will have stopped. It is necessary to press 3500 HVAC must be cut out and cut back in. the "Reset" key to restart VLT 3500 HVAC. Then press the "Reset" key to restart VLT 3500 HVAC.

  • Page 38: Initialisation, Return To Factory Setting

    Reset of operating data such as kWh and total number of running hours (parameter 600), as well as alarm memory (parameter 602). • Initialisation of all other parameters, as described under initialisation via parameter 604. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 39: 3.3 Parameter Overview

    Section 3 Section 3 Section 4 Section 4 Section 4 Section 4 Section 4 Section 2 Section 2 Section 2 Section 2 Section 2 Section 3 Section 3 Section 3 Section 1 Section 1 Section 1 Section 1 Section 1 3.3 Parameter overview...

  • Page 40: Parameter Group 0, Operation And Display

    The choice in this parameter defines the set-up num- sing the "Menu" key, or left automatically after 20 sec- ber you want to control VLT 3500 HVAC. The para- onds. meters that can be changed are stated on page 85- Line 3 in the display flashes while copying is in pro- 86.
  • Page 41 Data changes in parameter 004 are blocked if para- There is a choice of three different Local/remote meter 010 is programmed as DISABLE. control modes for controlling VLT 3500 HVAC: Use keypad, use keypad w/external stop and External H- The motor may start without warning if pa- O-A.
  • Page 42 VLT 3500 HVAC receives its start signal. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 43 (whose data are to be changed) during operation. The 4 menu set-ups can be programmed indepen- dently of the set-up in which VLT 3500 HVAC is running (selected in parameter 001). This concerns programming via the keyboard and the serial bus (RS 485).

  • Page 44: Parameter Group 1, Load And Motor

    ® 3500 HVAC Load and motor, group 1.. This group of parameters has been reserved for the adjustments necessary to adapt VLT 3500 HVAC to the application and motor. 100 Load (LOAD TYPE) Value: Variable torque low (VT MODE-LOW) Variable torque medium (VT MODE-MED)
  • Page 45 5 seconds, even if the current limit setting is 0. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 46 By connecting the motors in paral- lel, the start voltage can be used to increase the start torque. The programmed value is not changed in the case of varying load. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 47: Pid-Controller

    The bandwith can only be reduced if there is a correlation between the feedback and the motor speed. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 48 Regulating accuracy PID (closed loop) ±0.1% 5-50 Hz: (-140 - +140% load change) Open loop (digital) ±0.01% 0,5-120 Hz (frequency stability) ±0.05% Frequency resolution (digital) MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 49 The feedforward function determines the start frequency proportional to the setpoint. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 50 200%, which means that the feedback signal is recorded as 50% (25% x 200% = 50%). = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 51: Parameter Group 2, References And Limits

    References and limits, group 2.. NB!: NB!: NB!: NB!: NB!: VLT 3500 HVAC distinguishes between different types The analogue reference type is programmed in of references. group 4. Unused references are set at 0, or switched out (parameters 205-208, 412-413). 201 Minimum frequency (f ) (MIN FREQUENCY) 204 Digital reference type (DIG.
  • Page 52 /analogue reference MAX. In parameter 310 the length of time can be program- med that VLT 3500 HVAC is to run at the current limit Function (parameter 205-208): before cutting out. Four different, internal, digital references can be The load range between 100 and 110% can be pro- programmed in parameters 205-208.
  • Page 53 (S CURVE 3) In this parameter the upper warning limit f of the HIGH output frequency can be set for VLT 3500 HVAC's Function: normal operating range. There is a choice of 4 types of ramps. The sine shapes...
  • Page 54 120 Hz Description of parameter 219 - 222 see parameter 223. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 55 4.5 kHz. This function imporves the stability of the motor. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 56: Parameter Group 3, Start/Stop Functions

    Programme the desired time delay before VLT 3500 HVAC starts to ramp up. Function: This parameter is used when VLT 3500 HVAC cuts in on a rotating motor (e.g. after a power failure). 303 High starting torque (HI START TORQ.) Value: 0.0 - 1 sec.
  • Page 57 The braking torque depends on the selected DC brake voltage (par. 308). = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 58 The motor may start without warning. Off (OFF) On (ON) Function: 310 Trip delay at current limit (TRIP DLY@C.LIM) VLT 3500 HVAC is able to check whether a motor has Value: been connected. 0 - 60 secs. (OFF) Description of choice:...
  • Page 59 See function under parameter 316. Description of choice: See description of choice under parameter 316. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 60: Parameter Group 4, Inputs And Outputs

    When the 24 V DC signal is removed from terminal 16 or 19, the frequency converter stays in "Hand" Mode, H-O-A desired externally from VLT 3500 HVAC but the inverter stops. Via the digital inputs, it is possible to choose between "Hand"...
  • Page 61 12 to terminal 16 for min. 20 msec. will effect a stop function. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 62 Pulse Start Hand is given via terminal 19 or ter- minal 29. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 63 If serial communication is used, the input status can be read and used by the master. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 64 When the connection from terminal 12, 24 V DC, to terminal 27 is broken, this leads to a Stop. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 65 = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 66 Reduce reference (parameters 215 and 216). = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 67 VLT,N is the motor size programmed in para- VLT,N meter 103. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 68 332), since the relay uses this information to indicate e.g. whether the V-belt has broken. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 69 It is possible to select how the output frequency is to depend on the analogue reference signal. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 70 Please contact Danfoss for a De- sign Guide. sign Guide. sign Guide. sign Guide. sign Guide. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 71: Parameter Group 6, Service And Diagnostics

    Number of cut-ins/Number of overheatings/Number of overvoltages are saved as they occur. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 72 0 if another trip occurs. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 73 = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 74 Extended display (EXT. DISPLAY) Function: Choose between two different Display Modes, see page 34. = factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 75: Diagnosis And Service

    Bit 05 of the control word is "0". with the set ramping times. Stop (ENAB STOP .): Remote Control Mode ("Remote/Auto") is active and the frequency converter has been stopped via the keyboard or the control terminals. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 76: Warnings

    53 or 60), when a signal type with "live zero" has been chosen (4-20 mA, 1-5 V or 2-10 V). The warning is activated when the signal level is less than half the zero level (4 mA, 1 V or 2 V). MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 77: Alarm Messages

    Inverter fault (INVERT FAULT): than 7-11 secs. (Trip locked). Error code 1 Ground fault (GROUND FAULT): There is a fault in the power side of VLT 3500 HVAC. Error code 5 Please contact DANFOSS. There is a discharge from the output phases to ground, either in the cable between the frequency converter and the motor, or from inside the motor.

  • Page 78: Fault Messages

    ® 3500 HVAC Start-up test: Fault messages VLT 3500 HVAC carries out a self-test of the control • If an inactive key is pressed: card when the mains supply is cut in. The following KEY DISABLED KEY DISABLED KEY DISABLED...
  • Page 79 Fault messages Critical temperature Inverter fault The temperature inside VLT 3500 HVAC is too high. The power section of VLT 3500 HVAC is defective. Possible causes: Ambient temperature too high (max. 40/45°C), the heat sink ribs of the frequency conver- Overvoltage ter have been covered, or the fan is out of order.

  • Page 80: Special Conditions

    It is not frequency in an attempt to reduce the load. If the possible to damage VLT 3500 HVAC in any way by reduction of the output frequency does not reduce switching on the output. However, fault messages the load, a trip is activated when the output frequency may appear.
  • Page 81 Derating for ambient temperatur Derating for ambient temperatur Derating for ambient temperature e e e e Derating for ambient temperatur VLT 3500 HVAC has been designed to work using a The ambient temperature (T ) is the maximum AMB,MAX motor cable with a rated cross-section. If a cable with temperature allowed.

  • Page 82: Emc Test Results

    Acceptance criteria according to: IEC 22G/21/CDV, EN50082-2, 175R0740 CCC: Capacitive clamp coupling DNC: Direct coupling network Injection on cable shield 2.3 x Û max. test pulse e.g. 1350 V at 415 V peak MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 83 Section 3 Section 3 Section 4 Section 4 Section 4 Section 4 Section 4 Section 2 Section 2 Section 2 Section 2 Section 2 Section 3 Section 3 Section 3 Section 1 Section 1 Section 1 Section 1 Section 1 4.6 EMC teset results...
  • Page 84 According to experience, most installations represent only a slight risk of any interference from radiation. MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 85: Factory Settings

    Section 3 Section 3 Section 4 Section 4 Section 4 Section 4 Section 4 Section 2 Section 2 Section 2 Section 2 Section 2 Section 3 Section 3 Section 3 Section 1 Section 1 Section 1 Section 1 Section 1 4.7 Factory settings...
  • Page 86 NO LOAD CURR. Depending on unit ) Available in all 4 setups. #) Can only be changed in Stop Mode (motor stopped) *) For VLT 3542-3562 (230 V) and VLT 3575-3800 LOW SWFQ.LOW MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 87 OPERATION MODE Run normal DISPLAY SELECT Standard disp DISPLAY MODE Quick display VLT TYPE Dependning on unit ) Available in all 4 setups. #) Can only be changed in Stop Mode (motor stopped) MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 88: Customer Parameter Setting

    ® 3500 HVAC MG.35.B1.02 – VLT is a registered Danfoss trademark...

  • Page 89: Index

    Hand-Off-Auto ....... 60 Warning: Low current .... 53 Power Up Mode ....42 Heat emission ....... 11 Warning: Low frequency ..52 Pre-fuses ....... 13 High starting torque ....56 Proportional gain ....50 MG.35.B1.02 – VLT is a registered Danfoss trademark...
  • Page 90 ® 3500 HVAC MG.35.B1.02 – VLT is a registered Danfoss trademark...

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