Skov DOL 278A User manual

2016.01.27 • 603918
DOL 278A ON/OFF
User Manual
For other language variants of this
document we refer to your local
dealer or http://docs.skov.com/1061.
Available from April 2016.

DOL 278A ON/OFF
Version
It was released in 2016.
Product and Documentation Changes
SKOV A/S reserve the right to change this manual and the product described herein without further notice. In
case of doubt, please contact SKOV A/S.
Latest date of change appears from the back page.
Note
•All rights reserved. No part of this manual may be reproduced in any manner whatsoever without the
expressed written permission of SKOV A/S in each case.
•SKOV A/S have made reasonable efforts 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 notified thereof.
•Irrespective of the above, SKOV A/S shall not have any liability with respect to loss or damage
caused or alleged to be caused by reliance on any information contained herein.
•Copyright 2016 by SKOV A/S.

4 User Manual
DOL 278A ON/OFF
1Product Description................................................................................................. 5
2User Guide................................................................................................................ 5
2.1 Battery Lamp.......................................................................................................................5
2.2 Function...............................................................................................................................5
2.3 Weekly Testing....................................................................................................................6
3Maintenance Instructions........................................................................................ 6
3.1 Battery Voltage Check........................................................................................................6
3.2 Cleaning...............................................................................................................................6
3.3 Removal for Recycling........................................................................................................6
EU - DECLARATION OF CONFORMITY.....................................................................7

User Manual 5
DOL 278A ON/OFF
1 Product Description
This manual describes the operation of the DOL 278A ON/OFF emergency opening unit. The manual
provides the user with the basic knowledge about the functions of DOL 278A ON/OFF, which are
necessary for optimum operation.
DOL 278A ON/OFF is a simple emergency opening unit, which in combination with the climate
computer can emergency open in case of simple types of error. In case of emergency, the system
opens completely. Emergency opening is not available for all types of control failures.
A 24 V DC motor power supply, battery and charger are incorporated into DOL 278A ON/OFF.
Available in the following variants:
•DOL 278A ON/OFF, medium (4.2 A)
•DOL 278A ON/OFF, large (8 A)
2 User Guide
2.1 Battery Lamp
The green battery lamp remains lit as long as battery voltage is >16 V and there is
sufficient voltage for opening the flaps.
Red battery lamp emits light, when the battery is discharged <16V or blue battery fuse
is blown.
2.2 Function
DOL 278A ON/OFF provides a 24 V DC supply to the climate computer where extra or heavy duty winch
motors are to be used.
The built-in battery and charging circuit of DOL 278A ON/OFF provide standby power to open up the
ventilation system in an emergency situation. This will be triggered by:
•power failure
•high temperature
•absolute high temperature
•absolute high humidity
•defects in the inside temperature sensor connected to the climate computer
If the climate computer is a two-house computer supplied by the same incoming phase, power failure will open
both houses. The other emergency opening alarms, mentioned above, will operate the emergency opening in the
affected house only.
If the climate computer is supplied by two different incoming phases, the emergency opening upon power
failure acts in house 1 only. House 2 emergency opening will be triggered only by the other emergency
openings (not by power failure).

6 User Manual
DOL 278A ON/OFF
2.3 Weekly Testing
The emergency opening system MUST be tested once a week in order to ensure that the
emergency opening system works faultlessly.
During the summer season, the test is carried out early in the morning when the flaps have
not yet opened completely.
1) Disconnect the mains voltage to the climate computer and DOL 278A ON/OFF on the common
external TEST mains switch.
2) Check that:
•the inlets open completely (with a two-house computer they must open simultaneously in both
houses).
•the green battery lamp remains on during the entire test as a sign that the battery voltage is
sufficient (i.e. > 16 V).
3) Connect the mains voltage again.
The inlets must close again.
3 Maintenance Instructions
Replace the battery module at least every three years.
Replace the ventilation plugs at the same time as the battery.
3.1 Battery Voltage Check
Battery voltage can be measured by carrying out “Weekly testing” several consecutive times until the battery
can no longer open the motors. This way, a realistic measurement is achieved of how many times the connected
houses can be opened emergency-wise using the battery.
It should be possible to open the houses at least twice in a row using the battery when it is fully charged.
Charging the battery fully takes 3-5 hours.
3.2 Cleaning
Clean DOL 278A ON/OFF with a firmly wrung cloth, do not use solvents. Do not expose it to water jets or
high-pressure cleaning.
As for all electronic equipment, it is best for DOL 278A ON/OFF to be connected all the time as this will keep
it dry and free from condensation.
If power is to be switched off for several hours, disconnect the battery, as otherwise it will be damaged.
3.3 Removal for Recycling
SKOV A/S products, which are suited for recycling, are marked with a pictogram showing
a refuse bin that is crossed out. See the picture.
It will be possible for a customer to deliver SKOV products to local collection sites/recycling stations according
to local instructions. The recycling station will then send the products to an approved plant for recycling and
reuse.

User Manual 7
DOL 278A ON/OFF
EU - DECLARATION OF CONFORMITY
Manufacturer: SKOV A/S
Address: Hedelund 4, DK-7870 Roslev, Denmark
Telephone: [phone]
This declaration of conformity is issued under the sole responsibility of the manufacturer.
Product: DOL 278
Type, model: Emergency Opening
EU directives: 2014/35/EU (Low Voltage Directive (LVD))
2014/30/EU (Electromagnetic Compatibility (EMC))
2006/42/EC (Directive on Machinery)
Standards: EN 61000-6-2:2005 + AC:2005
EN 61000-6-4:2007 + A1:2011
We declare as manufacturer
that the products meet the requirements of the listed directives and standards.
Location: Hedelund 4, DK-7870 Roslev
Date: 2016.01.27
Jesper Mogensen
CTO

SKOV A/S • Hedelund 4 • Glyngøre • DK-7870 Roslev
Tel. [phone] • Fax [phone] • www.skov.com • E-mail: [e-mail]
2016.01.27 • 603918 • 05.02.05 • EN • Made in Denmark