DA 820F VFD
Fan High Pressure
Technical User Guide
604474 • 2022-05-23
DA 820F VFD
Technical User Guide 3
Product and Documentation Changes
SKOV A/S reserves the right to change this document and the product herein described without further notice.
In case of doubt, please contact SKOV A/S.
The date of change appears from the front and back pages.
IMPORTANT
Notes concerning alarm systems
Breakdowns, malfunctions or faulty settings may cause substantial damage and financial losses when regulat-
ing and controlling the climate in a livestock house. It is therefore essential to install a separate, independent
alarm system that monitors the house climate concurrently with the climate and production controller. According
to EU-directive No. 98/58/EU, an alarm system must be installed in all mechanically ventilated houses.
We would like to draw your attention to the fact that the product liability clause of general terms and conditions
of sale and delivery specifies that an alarm system must be installed.
Note
• All rights belong to SKOV A/S. No part of this manual may be reproduced in any manner whatsoever without
the expressed written permission of SKOV A/S in each case.
• All reasonable efforts have been made to ensure the accuracy of the information contained in this manual.
Should any mistakes or imprecise information occur in spite of this, SKOV A/S would appreciate being noti-
fied thereof.
• Irrespective of the above, SKOV A/S shall not accept any liability with regard to loss or damage caused or
alleged to be caused by reliance on any information contained herein.
• Copyright by SKOV A/S.
DA 820F VFD
Technical User Guide
1 Product description ....................................................................................................................................... 6
2 Product survey ............................................................................................................................................... 7
2.1 DA 820F VFD high pressure ..................................................................................................... 7
2.1.1 Accessories.................................................................................................................................. 7
3 Mounting guide............................................................................................................................................... 8
3.1 Recommended tools.................................................................................................................. 8
3.2 Mounting the ring with fan suspension in the exhaust unit .................................................. 9
3.3 Mounting the fan in the exhaust unit ..................................................................................... 10
3.4 Mounting the fan in the wall exhaustion................................................................................ 11
3.4.1 Mounting support kit................................................................................................................... 12
3.5 Safety distance......................................................................................................................... 13
3.6 Position of motor controller/frequency converter ................................................................ 13
3.7 Mounting distances for the motor controller/frequency converter..................................... 13
3.8 Position of frequency converter............................................................................................. 14
4 Installation guide.......................................................................................................................................... 15
4.1 Electrical connection............................................................................................................... 15
4.1.1 Disclaimer at retrofitting fans ..................................................................................................... 15
4.1.2 Mains supply dimensioning regarding harmonic distortion ........................................................ 15
4.1.3 Overvoltage protection............................................................................................................... 15
4.1.4 Cabling in the exhaust unit......................................................................................................... 16
4.1.5 Cabling into the motor controller/frequency converter ............................................................... 16
4.2 Connection in the LPC motor controller................................................................................ 17
4.2.1 Terminals for power supply........................................................................................................ 18
4.2.2 Terminals for power supply of fan.............................................................................................. 19
4.2.3 Signal terminals ......................................................................................................................... 19
4.2.4 Terminals on relay module......................................................................................................... 20
4.3 LED indication on the motor controller/frequency converter.............................................. 21
4.4 Alarms....................................................................................................................................... 21
4.5 Adjusting the jumper and connecting the shutter................................................................ 22
4.6 General information about circuit diagrams ......................................................................... 23
4.6.1 Color code.................................................................................................................................. 23
4.6.2 Power supply isolator................................................................................................................. 23
4.6.3 Letter Code ................................................................................................................................ 23
4.7 Cable plans and circuit diagrams........................................................................................... 24
4.7.1 DA 820F VFD 400 V with DA 74CO ON/OFF ........................................................................... 24
4.7.1.1 Cable plan.................................................................................................................................. 24
4.7.1.2 Terminals in VFD 400 V fan....................................................................................................... 24
4.7.1.3 Terminals in DA 74CO ............................................................................................................... 25
4.7.1.4 Circuit diagram........................................................................................................................... 25
4.7.2 DA 820F VFD 400 V with DA 74CV stepless ............................................................................ 26
4.7.2.1 Cable plan.................................................................................................................................. 26
4.7.2.2 Terminals in VFD 400 V fan....................................................................................................... 26
4.7.2.3 Terminals in DA 74CV ............................................................................................................... 27
4.7.2.4 Circuit diagram........................................................................................................................... 27
4.7.3 DA 820F VFD/DA 74CV stepless with reverse ......................................................................... 28
4.7.3.1 Cable plan.................................................................................................................................. 28
4.7.3.2 Circuit diagram........................................................................................................................... 29
4.7.4 DA 820F VFD/DADA 74CV stepless with alarm relay .............................................................. 30
4.7.4.1 Cable plan.................................................................................................................................. 30
4.7.4.2 Circuit diagram........................................................................................................................... 31
5 Maintenance instructions ............................................................................................................................ 32
5.1 Cleaning.................................................................................................................................... 32
DA 820F VFD
5.1.1 Fan............................................................................................................................................. 32
5.1.2 Motor controller/frequency converter ......................................................................................... 32
5.2 Recycling/Disposal .................................................................................................................. 32
6 Troubleshooting guide ................................................................................................................................ 33
7 Technical data .............................................................................................................................................. 35
7.1 DA 820F VFD 3x400 V .............................................................................................................. 35
7.1.1 Erp/Ecodesign DA 820F VFD 3x400 V ..................................................................................... 37
7.2 Dimensioned sketch ................................................................................................................ 38
7.2.1 DA 820F VFD ............................................................................................................................ 38
Technical User Guide
DA 820F VFD
6 Technical User Guide
1 Product description
The ON/OFF fan is controlled with a sturdy frequency converter for
three-phase fans.
The frequency converter is controlled by a 10-0 V signal from a cli-
mate controller.
The fans are designed for mounting in exhaust units and wall exhaustion in livestock houses where the ventila-
tion system operates in the high pressure range.
The fans bear a CE marking and have a sturdy four-point suspension.
DA 820F VFD
Technical User Guide 7
2 Product survey
2.1 DA 820F VFD high pressure
445040 DA 820F VFD fan high pressure 400V3 50/60Hz
This product consists of a 3x400 V fan and a frequency converter.
The frequency converter is controlled via a 10-0 V signal.
The max. current consumption of the fan is 4.1 A.
The fan is supplied with a 5 m shielded cable to be used between the motor
and the frequency converter. The distance between the frequency converter
and the motor must not exceed 5 m. The supply to the frequency converter
does not require a shielded cable.
High pressure stability, high performance, and relatively high energy con-
sumption.
Is used where a high working pressure is required, up to 180 Pa. High
power consumption and noise level must be anticipated at maximum out-
put.
The fan may only be used in Dynamic MultiStep systems and must not be
combined with other fans. Standard MultiStep is not an option due to the
large pressure differences.
ErP 2015 approved.
2.1.1 Accessories
445076 LPC-2 relay module
Used for mounting in motor controller/frequency converter, if an alarm out-
put is required or reversing of fan is required.
1 x potential free output relay 1 A, 30 V DC/24 V AC.
1 x digital input.
DA 820F VFD
8 Technical User Guide
3 Mounting guide
3.1 Recommended tools
A list of the recommended tools for mounting purposes can be seen below.
Item Description
Cordless drill
Screwdriver bits
Drill kit
Multimeter
Utility knife
Side cutter
Pointed pliers
Screwdriver
Allen key kit
Ladder
DA 820F VFD
Technical User Guide 9
3.2 Mounting the ring with fan suspension in the exhaust unit
200 mm
Place the ring with fan suspension 200 mm from the top
edge.
Mark up the 8 holes.
Drill the 8 holes at the markings with an ø8 drill bit.
Mount the ring with fan suspension on the duct using:
• 8 x M8x30 screws
• 8 x ø8.4/ø16x1.6 washers
• 8 x M8 self-locking nuts
DA 820F VFD
10 Technical User Guide
3.3 Mounting the fan in the exhaust unit
The fans must face the fan blades downward.
Position the legs of the fan in the 4 fan suspension units.
Attach the fan suspension at all 4 legs using:
• 1 x M6x50 screw
• 1 x M6 self-locking nut
DA 820F VFD
Technical User Guide 11
3.4 Mounting the fan in the wall exhaustion
When the fan is used as wall exhaustion, the terminal
box on the fan must turn as shown in the picture and the
drain screw must be removed.
The fan must face the fan blades inwards.
The winch motor is placed as shown on the drawing.
Position the legs of the fan in the 4 fan suspension units.
Attach the fan suspension at all 4 legs using:
• 1 x M6x50 screw
• 1 x M6 self-locking nut
DA 820F VFD
12 Technical User Guide
3.4.1 Mounting support kit
(D)
(A)
(C)
(E)
(B)
Mount bracket (A) on fan duct using:
• 1 x M6x30 screw
• 1 x M6 self-locking nut
Replace the M8x20 screw in the fan suspension with
M6x30.
Mount threaded rod (B) in bracket (A).
Tilt the threaded rod against the wall and shorten it to the
correct length.
Mount 2 x M10 nuts (C) on the threaded rod.
Mount the wall fitting (D) on the threaded rod.
Mount the wall fitting (E) on the wall.
Adjust the support kit by screwing the 2 nuts (C) on the
threaded rod towards or away from the wall bracket.
DA 820F VFD
Technical User Guide 13
3.5 Safety distance
If the distance from the floor to the fan blade is less than
270cm, mounting a protective mesh in the inlet bell
mouth may be required to meet the statutory require-
ments.
3.6 Position of motor controller/frequency converter
Motor controller/frequency converter must not be built-in
or covered and must be mounted on a solid, level sur-
face.
In order to uphold protection classifications, access and
cooling, the motor controller/frequency converter must
be positioned as shown in section Mounting distances
for the motor controller/frequency converter [}13].
3.7 Mounting distances for the motor controller/frequency converter
In order to ensure access of cables and cooling of the
motor controller/frequency converter, the distances to
the surroundings must be met.
DA 820F VFD
14 Technical User Guide
3.8 Position of frequency converter
The frequency converter is positioned so that the ambi-
ent temperature is between ÷ 40 °C and + 40°C and pro-
tected against direct sunlight.
Temperature, operating ÷ 40 °C to + 40.
Start temperature ÷ 40 °C to + 50.
Mount the frequency converter as close to the fan as
possible.
The 5 m cable included must not be extended.
The frequency converter can be mounted on a wooden
plate fastened to a rafter on the ceiling or directly on the
chimney.
DA 820F VFD
Technical User Guide 15
4 Installation guide
4.1 Electrical connection
Wait 10 minutes for the capacitors to discharge to a safe voltage level before servicing and trou-
bleshooting.
Failure to observe this precaution could result in serious injury or loss of life.
Installation, servicing and troubleshooting of all electrical equipment must be carried out by quali-
fied personnel in compliance with the applicable national and international standard EN 60204-1
and any other EU standards that are applicable in Europe.
The installation of a power supply isolator is required for each motor and power supply to facilitate
voltage-free work on the electrical equipment. The power supply isolator is not included.
4.1.1 Disclaimer at retrofitting fans
In the case of retrofitting fans in an existing house, regardless of ON/OFF fans, LPC fans or frequency convert-
ers SKOV recommends that a local expert is involved in checking the electrical installations. The focus should
be on cable dimensions, overload protections, local transformers, etc. It is of outmost importance to take the fan
specifications into account and, at the same time, ensure that local requirements are fulfilled.
4.1.2 Mains supply dimensioning regarding harmonic distortion
LPC motor controllers and frequency converters function like any other electronic power converter by converting
AC to DC. As this conversion produces a non-sinusoidal current, the mains supply for the controller is affected
by harmonic distortion.
The electrician or the user of the equipment must ensure, possibly through contact with the supply company,
that the equipment is connected to a properly sized mains supply.
4.1.3 Overvoltage protection
SKOV A/S equipment are protected for high level of surge transient, but in some cases, specially in areas with
frequent lightning strikes and power outage, additional protection is necessary. To reduce the risk of damaging
the electronic equipment by large surge overvoltage, it is therefore recommended, always to install Surge Pro-
tection Devices (SPD) in the mains supply.
As a minimum a Type 2/Class II device should be installed in each livestock house wiring box. A device of
8/20us - 40kA/phase or higher is recommended.
In areas with a high amount of surge overvoltage a Type 1/Class I device is reccomended to be installed at the
transformer/ATS as the first protection device, together with Type 2 in each livestock house wiring box as sec-
ond protection device. A Type 1 device of 10/350us - 25kA/phase or higher is are recommended.
Local electrical engineers must be consulted for correct dimensioning and installation of the SPD device.
Figure1: Example of installation of SPD
DA 820F VFD
16 Technical User Guide
4.1.4 Cabling in the exhaust unit
Drill a hole in the exhaust unit duct for the fan cable and
pull it along a support to the same side as the motor con-
troller/frequency converter.
4.1.5 Cabling into the motor controller/frequency converter
In order to prevent water from running into the motor
controller/frequency converter via cables and screwed
connections, the cabling must be carried out so that it
can stand water around the cable in the gasket of the
screwed connection.
DA 820F VFD
Technical User Guide 17
4.2 Connection in the LPC motor controller
1Motor connection terminals (U, V, W, PE)
2Connection terminals for braking resistor (not used)
3Connector for optional module
4Terminal block for programming interface
5RJ12 programming connector (2 x slave / 1 x master)
63-point strain relief for modbus cable
7Power supply terminals for 1-phase (L, N, PE) and 3-phase (L1, L2, L3, N, PE)
DA 820F VFD
18 Technical User Guide
4.2.1 Terminals for power supply
Power supply 3 x 400 V / 3 x 230 V.
Power supply 1 x 230 V.
DA 820F VFD
Technical User Guide 19
4.2.2 Terminals for power supply of fan
Remember to strip the cable so that the protective shield
from the fan can be connected to the motor controller
during mounting under the rail.
Connection from motor controller to fan motor.
4.2.3 Signal terminals
Not in use
Not in use
Ground
Not in use
Signal from controller
Ground
10-0 V = open
0-10 V = GND (Short-circuit connection between terminal 7 and
GND)
Stop = open
Start = GND (Short-circuit connection between terminal 8 and
GND)
Not in use
Ground
DA 820F VFD
20 Technical User Guide
4.2.4 Terminals on relay module
Relay module 445076 can be purchased as accessories.
Ground
Normal = open
Reverse = GND (Short-circuit connection between terminal 15
and GND)
Not in use
Alarm NO
Max. 30 V DC / 24 V AC
Alarm NC
Mount the relay module as shown in the picture.
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