DOL 278AT
Emergency Opening
Technical Manual
603923 • 2023-10-13
DOL 278AT
2 Technical Manual
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.
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.
DOL 278AT
1 Product description ....................................................................................................................................... 4
2 Procedure........................................................................................................................................................ 5
3 Product survey ............................................................................................................................................... 6
4 Mounting guide............................................................................................................................................... 7
4.1 Mounting of climate sensors .................................................................................................... 8
5 Installation guide............................................................................................................................................ 9
5.1 Installation of battery................................................................................................................. 9
5.2 Installation of the TEST supply separator ............................................................................... 9
5.3 Cable dimensions for 24V DC depending on length ............................................................ 10
5.4 Setting the supply voltage on the power supply .................................................................. 10
5.5 Connection to the house controller ....................................................................................... 11
5.5.1 Setting of jumpers ...................................................................................................................... 12
5.5.1.1 Jumper setting for Combi-Tunnel mode..................................................................................... 12
5.6 Setup options at high power consumption ........................................................................... 13
5.7 Cable plan................................................................................................................................. 14
5.8 Wiring diagrams....................................................................................................................... 15
5.8.1 Emergency opening - Medium ................................................................................................... 15
5.8.2 Emergency opening - Large....................................................................................................... 16
5.8.3 Emergency opening - Temperature controlled and with DOL 278 ON/OFF ............................. 17
5.9 Number of fans and actuators on emergency opening........................................................ 18
5.10 Setting of house controller ..................................................................................................... 18
5.10.1 Active functions when the control fails ....................................................................................... 18
6 Testing........................................................................................................................................................... 20
6.1 Lamp indications ..................................................................................................................... 20
6.2 Testing the installation............................................................................................................ 21
6.3 Testing battery capacity.......................................................................................................... 22
6.3.1 Testing battery voltage............................................................................................................... 22
6.3.2 Testing the battery capacity with disconnected supply voltage/phase break............................. 22
6.4 Temperature Sensor Control Table........................................................................................ 23
6.4.1 Table relating to DOL 12 temperature sensor control................................................................ 23
7 Troubleshooting guide ................................................................................................................................ 24
8 Technical data .............................................................................................................................................. 25
8.1 Dimensioned sketch ................................................................................................................ 26
Technical Manual
DOL 278AT
4 Technical Manual
1 Product description
DOL 278T is an advanced emergency opening unit providing optimum safety in connection with technical fail-
ures. This is achieved by means of a separate temperature sensor and manual setting of the temperature limit
for emergency opening. DOL 278T opens only as much as needed.
DOL 278T is specially designed for harsh livestock house environments. This applies to both climatic and elec-
trical influences. The system has a built-in 24 VDC motor power supply unit, maintenance-free battery and
charger.
DOL 278T regulates every three minutes. If the house temperature exceeds the setting of the temperature but-
ton by e.g. one degree, the shutters open only for a few seconds every three minutes. If the house temperature
exceeds the setting of the temperature button by e.g. six degrees, the shutters open for several seconds every
three minutes.
With it own outside temperature sensor DOL 278T takes high summer temperatures into consideration. Thus,
when the house is already open due to summer temperatures, the DOL 278T does not trigger an emergency
opening alarm.
DOL 278T and its settings are monitored by the house controller. It triggers an alarm, for example if DOL 278T´s
temperature button for emergency opening has been set too high or if the battery voltage is too low.
Emergency operation the first 3 minutes after supply voltage is restored
If the supply voltage is interrupted DOL 278T takes over the control system from the house controller and DOL
278T can open the shutters if necessary (emergency operation). When the supply voltage returns and the
house controller starts up again, there will be a risk heat loss during cold periods (outside temperature of less
than 20°C) when shutters are opened during start-up.
To lower this heat loss the DOL 278T controls the winch motors during the first 3 minutes after the supply volt-
age is restored, while the house controller starts up again. After this period the house controller resumes con-
trol.
On the other hand, during hot periods (outside temperature over 20°C) the DOL 278T makes sure that the cli-
mate control is restored as soon as possible by starting the fans as the house controller starts up.
DOL 278T in warm climates/Combi-Tunnel
When DOL 278T is used with a Combi-Tunnel house controller the jumper is to be set to WARM, so that un-
wanted emergency opening is avoided when the house controller runs in tunnel mode.
The following occurs when DOL 278T is set to WARM:
• Emergency opening is not triggered for high livestock house temperatures at outside temperatures over
20°C.
• Emergency opening is still triggered at power failure.
• At outside temperatures below 20°C the DOL 278T works as normal.
DOL 278T in normal climate
The following occurs when DOL 278T is set to NORM:
• Emergency opening is triggered even if the outside temperature is over 20°C.
• Emergency opening is still triggered at power failure.
At high power consumption
When a high power consumption exceeding 8 A is required, the DOL 278T can be extended with DOL 278 ON/
OFF of 4.2 A, 8 A or 10 A. See section Setup options at high power consumption [}13].
A mini UPS Mini Power unit is available as an accessory. This unit enables the house controller to regulate ven-
tilation for a short period during a power failure so that emergency control via the emergency opening unit does
not need to take over. The mini UPS module can be connected to an alarm system so that alarms will be gener-
ated when the module is active.
DOL 278AT
Technical Manual 5
2 Procedure
This manual describes the mounting, installation and commissioning of a DOL 278T controlled emergency
opening system and is aimed primarily at the technicians and electricians who will be mounting, installing and
testing the emergency opening system.
The following checklist indicates the main points of the work flow regarding set up of the emergency opening
system.
Mounting
1. DOL 278T.
2. Temperature sensors.
Installation
1. Battery.
2. Test supply separator.
3. Setting the supply voltage.
4. Connect cables according to the wiring diagram.
5. Connection to the house controller.
6. Connecting supply voltage.
7. Setting of house controller.
Testing
1. DOL 278T.
2. Battery.
3. Temperature sensors.
Start-up
1. Setting
DOL 278AT
6 Technical Manual
3 Product survey
134692 DOL 278AMT-1 EmergencyOpen Temp Medium 4.2A
Temperature-controlled emergency opening in a one-house version.
Max. power consumption: 4.2 A
Battery: 4 Ah
Two temperature sensors are included (1 inside temperature sensor + 1
outside temperature sensor).
134693 DOL 278AMT-2 EmergencyOpen Temp Medium 4.2A
Temperature-controlled emergency opening in a two-house version.
Max. power consumption: 4.2 A
Battery: 4 Ah
Three temperature sensors are included (2 inside temperature sensors + 1
outside temperature sensor).
134694 DOL 278ALT-1 EmergencyOpen Temp Large 8A
Temperature-controlled emergency opening in a one-house version.
Max. power consumption: 8 A
Battery: 7 Ah
Two temperature sensors are included (1 inside temperature sensor + 1
outside temperature sensor).
134695 DOL 278ALT-2 EmergencyOpen Temp Large 8A
Temperature-controlled emergency opening in a two-house version.
Max. power consumption: 8 A
Battery: 7 Ah
Three temperature sensors are included (2 inside temperature sensors + 1
outside temperature sensor).
134792 Mini-UPS, Mini-Power, Universal
Five minutes' battery backup of house computer via emergency opening
battery.
For fitting or retrofitting in a emergency opening unit.
Used in areas where 230V mains failures frequently occur.
Use one Mini UPS per house controller.
Two Mini UPS can be mounted in an emergency opening unit.
134784 DOL 278 connecting cable 354 cm
The cable is used to connect the emergency opening to the house con-
troller if the supplied 134 cm cable is not long enough.
DOL 278AT
Technical Manual 7
4 Mounting guide
1. Drill holes in the bottom of the cabinet (A).
2. Place the emergency opening unit:
- close enough to the house controller for the rubber sleeve supplied (B) to fit neatly between them (the
emergency opening unit can be placed on either side of the house controller).
- so that there is enough space, particularly above the emergency opening unit for service setting (C) of the
front panel.
3. Knock out large knock-out pieces (D) from the house controller and the emergency opening unit and mount
the rubber sleeve in one of the holes.
4. If the ventilation plug (H) is removed, move it to the left side (I) to maintain the battery ventilation.
5. Mount the emergency opening unit using Ø5 screws and, if necessary, Ø8 wall plugs (E), so that the rubber
sleeve is squeezed approx. 10 mm.
6. Mount the rubber sleeve (B) so it is waterproof.
7. Run the cables through the rubber sleeve (B).
If space is inadequate right next to the house controller, the rubber sleeve can be left out, and the cables can be
extended and routed through M25 screwed cable connections (F).
Contactor or auxiliary relay (G) must not be installed in an emergency opening unit, as the battery
may explode in the event of a fault.
DOL 278AT
8 Technical Manual
4.1 Mounting of climate sensors
• Never use a plug on the DOL 12 temperature sensor as a bad connection here could have disas-
trous results.
• Never use shrink-on sleeves when splicing wires inside the livestock house. Use a contact box.
Placing of sensors inside the house
• Place the sensor in the middle of the livestock house.
• In case of animals on floor the sensor is placed 1 meter over the animals (make sure the animals cannot
reach sensors).
• In cages (poultry) the sensor is placed in the middle of the cage height 100 mm from the edge of the cage.
• When using Tunnel place the DOL 10 tunnel cooling sensor ¼ in the front zone see drawing.
Tunnel cooling sensor
• Remember that temperature, humidity, alarm and emergency sensors should be placed together, if possible
use board for sensors (are available as accessory).
Do not place the sensor Cause
Above housing equipment. The pigs can reach them.
Near cooling system. Water and humidity will affect the sensors.
In a drafty area.
So it is directly affected by the air intake.
Measures the wrong temperature in the live-
stock house.
Where sunrays can shine on the sensor through windows.
Take into account that the altitude of the sun varies with the
season/time of day.
Measures a too high temperature. Ventilation
level too high.
Above or in a position where it is otherwise affected by the
heating system/heating pipe.
The heat moves up towards the sensors.
Placing of sensors outside the house
• In Combi-Tunnel systems radiation shield must be mounted, in LPV and tunnel systems it is recommended
to mount the radiation shield (available as accessories). Sensor with radiation shield must be placed in the
open air.
• Sensor without radiation shield must be placed on the shady side of the house to avoid the sun. Take into
account that the altitude of the sun varies with the season/time of day.
• As much in the open as possible, but protected from rain and snow.
DOL 278AT
Technical Manual 9
5 Installation guide
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.
5.1 Installation of battery
Use only VRLA battery set 18 V (3 x 6 V) as the battery otherwise may explode.
Battery module 4 Ah for emergency opening unit Medium.
Tick and attach the supplied battery date label to the outside of the cabinet.
Place the battery on the shelf in the cabinet.
Battery module 7 Ah for emergency opening unit Large.
5.2 Installation of the TEST supply separator
Place the TEST supply separator next to the emergency opening unit and the house controller for weekly testing
of the emergency opening unit.
A two-pole supply separator must be used if the two-house controller is supplied from separate phases. A three-
pole supply separator must be used at several house controllers for the same emergency opening unit.
The emergency opening unit must be supplied from the same phase as the house controller.
DOL 278AT
10 Technical Manual
5.3 Cable dimensions for 24V DC depending on length
2 A motor 4 A motor 8 A motor 10 A motor
AWG Cross
section
Length Length Length Length
16 1.5 mm20 - 41 m 0 - 20 m - -
14 2.5 mm242 – 68 m 21 – 34 m 0 – 17 m -
11 4 mm269 - 109 35 – 54 m 18 – 27 m 0 – 22 m
88 mm2110 - 217 55 – 109 m 28 – 54 m 23 – 43 m
Example Note the limited maximum distance between emergency opening/house controller and motor of
max. 22 meters by 4 mm2 cable at 10 A motor.
5.4 Setting the supply voltage on the power supply
Before you connect supply voltage, it is important to set the voltage in the power supply so that it
corresponds to the voltage level in the local house.
1. Set the voltage in the power supply.
2. Connect the supply voltage.
200-230 V Leave the plug in (factory setting)
100-115 V Move the plug to 100-115 V
Emergency opening Medium 4 A: Supply voltage must be set on one module.
Emergency opening Large 8 A: Supply voltage must be set on two modules.
DOL 278AT
Technical Manual 11
5.5 Connection to the house controller
1. Remove the jumper plug (A) (place it in the bottom of the cabinet).
2. Connect the enclosed connecting cable (B).
3. Fasten the six conductors in the terminal block (C) Q1-Q5 and F6.
4. Connect the thirteen-pole cable in the emergency opening (D) in the terminal block F6 and T1-T12 (the ca-
ble can be replaced by a longer one (max. 3 m.), run it through the cable glands). Connect wire 1 to T1 etc.
See sectionWiring diagrams [}15].
5. Set jumpers (E) in the house controller, see section Setting of house controller [}18].
Additional I/O module type 3
For additional I/O module type 15,
the jumper is factory set to ON.
DOL 278AT
12 Technical Manual
5.5.1 Setting of jumpers
Jumper adjustment should be carried out while there is no voltage across the PCB.
Function Jumper Setting (period for air inlet)
Outside tempera-
ture compensa-
tion
J7 (F) OFF: Outside temperature compensation not active
ON: Outside temperature compensation active (fac-
tory setting)
Run time
(For complete
opening of inlet)
J8 (G) 2 min. (minutes) for: DA 74, DA 75-1, DA 75-3 winch
motors (factory setting)
4 min. (minutes) for: DA 175, DA 75-6, DA 75-12
(slow) winch motors
5.5.1.1 Jumper setting for Combi-Tunnel mode
In areas with a hot climate, the emergency opening is often used in combination with Combi-Tunnel house con-
trollers. In such a situation emergency opening in Tunnel mode is not desired as that will destroy the ventilation
chill effect.
The setting can be found on the PCB at the top of the cover.
NORM = Normal
WARM = Combi-Tunnel-mode (for warm climatic zones)
The jumper should be installed while there is no voltage across the PCB. Remove the supply voltage by
dismantling the flat cable from the relay panel to the cover.
Ensure that the jumper is positioned correctly, as it otherwise can damage the printed circuit board when power-
ing up.
Check setup:
1. Connect voltage
2. Light-emitting diodes for battery voltage:
•WARM/Combi-Tunnel mode: Red light-emitting diode. Flashes rapidly (0.5 sec.) after start-up.
•NORM/Normal emergency opening: Green light-emitting diode. Flashes rapidly (0.5 sec.) after start-up.
In the WARM/Combi-Tunnel mode the DOL 278T does not allow for emergency opening for high inside temper-
ature when the outside temperature is above 20 °C. It will, however, still allow for emergency opening at power
failure.
DOL 278AT
Technical Manual 13
5.6 Setup options at high power consumption
When the distance between the climate controller and wall fan or actuator is long, you can avoid long, thick low-
power cables by placing DOL 278 ON/OFF close to the power-consuming units.
An unlimited number of DOL 278 ON/OFF can be installed close to wall fans and actuators to supply 24 V DC.
DOL 278 ON/OFF at wall fan
DOL 278T at climate controller
24V / 4A, 8A or 10A supply for actuators
If fans and actuators use DOL 278T, the jumper for ‘Emergency opening ON/OFF’ must be set to ON on the re-
lays in the climate controller.
On additional I/O module type 15 all relays for ‘Emergency opening ON/OFF’ are set to ON from the factory.
If fans and actuators use DOL 278 ON/OFF, the jumper for ‘Emergency opening ON/OFF’ must be set to OFF
on the relays in the climate controller.
Use additional I/O module type 3 with jumper settings option when expanding number of relays in the climate
controller.
DOL 278AT
14 Technical Manual
5.7 Cable plan
House 1 House 2 Shady side
DOL 12 outside temperature
DOL 12 temperature
DOL 114
temperature /
humidity
DOL 114
temperature / humidity
DOL 12 temperature
Service room
Controller Emergency opening
Power supply
Only two-house
DOL 278AT
Technical Manual 15
5.8 Wiring diagrams
5.8.1 Emergency opening - Medium
Emergency opening
- Medium
Winch motor - chimney
Winch motor - wall
House controller
DOL 278AT
16 Technical Manual
5.8.2 Emergency opening - Large
Emergency opening -
Large
Winch motor - chimney
Winch motor - wall
House controller
DOL 278AT
Technical Manual 17
5.8.3 Emergency opening - Temperature controlled and with DOL 278 ON/
OFF
DOL 278T placed at climate controller and DOL 278 ON/OFF placed at fan. DOL 278 ON/OFF is used as extra
power supply.
No. 2
No. 1
No.
xx
Fuse
DOL 278 ON/OFF no. 2
BF 50 LPC actuator
(ON/ OFF emergency opening)
DA 1700 dual actuator
(ON/OFF emergency opening)
DOL 278 ON/OFF no. 1
Supply for
actuators
24 V DC supply cables
See table 5.3 cable dimensions
Control signal
1.5 mm2 (16AWG)
DA 600/ 820 with
DA 74C winch motor
(Temperature controlled
emergency opening)
DA 175 actuator
(Temperature controlled
emergency opening)
Emergency opening
Jumper in climate controller
Climate controller
Fuse
Supply for
actuators
Fuse
DOL 278AT
18 Technical Manual
5.9 Number of fans and actuators on emergency opening
The table states the maximum number of fans and actuators that can be connected to DOL 278 ON/OFF, when
DOL 278 ON/OFF is used as additional 24 V DC power supply.
DOL 278AM emergency
opening ON/OFF
Medium,
4.2A
DOL 278AL emergency
opening ON/OFF Large,
8A
DOL 278AXL emergency
opening ON/OFF X-
Large,
10A
BF 50 LPC fan 5 10 12
BF 50 ON/OFF fan 4 8 10
DA 1700 LPC and ON/OFF
dual actuator
3* 6* 7
DA 1700 LPC and ON/OFF
winch motor
30* 60* 70
DA 600/ 820 – 74C 40 80 100
DA 75A-6 245
DA 175-300 actuator 4 8 10
DA 175-600 actuator 245
* DA 1700 shutter and actuators must not be controlled by signal from temperature controlled emergency open-
ing. They must always be configured as ON/OFF emergency opening.
DA 75 winch motors are special and cannot be used when placing the DOL 278 ON/OFF next to the winch mo-
tor. DA 75 must be connected and supplied via thick cables from the relays of the climate controller. This is
most efficiently done by or placing the DOL 278 ON/OFF or DOL 278T next to the climate controller.
The documentation for the individual products shows the power consumption to be used when calculating the
total power consumption for the emergency opening system. It is important that the maximum consumption for
DOL 278 ON/OFF and DOL 278T is and not exceeded.
5.10 Setting of house controller
5.10.1 Active functions when the control fails
Jumpers for emergency opening
In connection with the installation of the emergency opening
system, the jumpers of the main module and the I/O module
must be set as indicated at the end of the house controller’s
menu Technical | Setup | Show connection.
The emergency opening system overrules functions only where the jumper is set to ON (e.g. winch mo-
tors and MultiStep steps).
When installing MultiStep air outlet and side cooling, you must decide how these functions is to react in an
emergency situation, see Technical Manual for the house controller.
MultiStep air outlet
DOL 278AT
Technical Manual 19
Yes: When the control fails, the air outlet is active.
No: When the control fails, the air outlet is inactive.
Side cooling
Yes: When the control fails, side cooling is active and runs until
the emergency situation is over.
No: When the control fails, the side cooling is not active.
DOL 278AT
20 Technical Manual
6 Testing
6.1 Lamp indications
Flashing sequence Cause
2 sec. - endless
Outdoor temperature compensation active:
Switches on in the relevant side(s) (yellow).
0.1 sec./1 sec. - 3 sec.
Misplaced outside sensor:
Move the outside sensor away from the sunlight.
Flashes in both sides (yellow).
0.1 sec./1 sec.
Short-circuited or disconnected outdoor tempera-
ture sensor:
Flashes in both sides (yellow).
1 sec./1 sec.
Blocked by falling inside temperature:
Flashes on the relevant side(s) (yellow).
0.1 sec./1 sec.
Short-circuited or disconnected indoor temperature
sensor:
Flashes on in the relevant side(s) (red).
2 sec. - endless
Emergency opening:
Switches on in the relevant side(s) (red).
As long as the emergency opening is active.
2- 80 sec.
Opens:
Switches on in the relevant side(s) (green).
While motor is opening.
0.1 sec./0.5 sec.
Power-ON indication NORM / WARM setting:
Flashing (green) Power-ON = NORM = Normal cold cli-
mate.
Flashing (red) Power-ON = WARM = Combi-Tunnel
warm climate.
5- 10 sec. 1 sec./1 sec.
Phase break/mains failure 115/230 V:
The relevant battery lamp is flashing (green, yellow or
red) after 5-10 sec.
Both emergency opening lamps switches on (red).
0.5 sec./0.5 sec.
0.5 sec./0.5 sec.
3 min.
3 min.
Maintain emergency opening for 3 minutes
After phase break/power failure has been restored
(when outside temp. is < 20’C).
In the meantime emergency opening lamps lit (red).
The relevant battery lamp is flashing (green, yellow or
red).
Opening lamps are flashing on both sides (green).
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