
Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
MAICO Ventilatoren
Steinbeisstraße 20
D-78056 VS-Schwenningen
: +49(0)7720/694-0
www.maico-ventilatoren.com
CONTENTS
1 SAFETY REGULATIONS AND INSTRUCTIONS 2
1.1 Symbols and safety notices 2
1.2 Personnel requirements (qualifications) 2
1.3 Safety regulations 2
1.4 Electrical current 2
1.5 Electro-magnetic radiation 2
1.6 Storage 2
1.7 Disposal 3
2 INTENDED USE 3
3 TECHNICAL DATA 3
3.1 Rated values 3
3.2 Mounting data 3
3.3 Device drawings 3
3.4 Transport and storage conditions 4
4 CONNECTION AND COMMISSIONING 4
4.1 Make mechanical connection 4
4.2 Make electrical connection 4
4.2.1 Requirements 4
4.3 Check connections 4
4.4 Switch on device 4
4.5 Switch off device 4
4.6 Procedure 5
5 MALFUNCTIONS, CLEANING, SERVICING 6
5.1 Malfunctions 6
5.2 Cleaning 6
5.3 Maintenance 6
6 CIRCUIT DIAGRAMS 6
6.1 Wire allocation 6
6.2 Version with EC 3 7
6.3 Version with EC 010 7
6.4 Version with EC 230 8

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
DANGER!
... indicates an imminently dangerous situation
that could lead to death or serious injuries if
not avoided.
WARNING!
... indicates a potentially dangerous situation
that could lead to death or serious injuries if
not avoided.
CAUTION!
... indicates a potentially dangerous situation
that could lead to minor or slight injuries if not
avoided.
NOTE!
... highlights useful tips and recommendations
as well as information for efficient and troublefree operation.
DANGER!
Danger of lethal electrocution from elec-
trical current!
There is an immediate danger to life if any
current-carrying components are touched.
Damage to the insulation or to individual components can be life-threatening.
Therefore:
Switch off immediately and have repair
work carried out in the event of any damage to the insulation of the power supply.
Employ only specialist electricians to carry
out work on electrical systems.
For all work on the electrical system,
disconnect the power supply and determine that no voltage is present.
Switch off the power supply and secure it
against being switched on again before
any maintenance, cleaning and repair
work.
Do not bypass or put any fuses out of
operation. Comply with the correct currents when changing fuses.
Keep humidity away from current-carrying
components. This can lead to a short circuit.
When carrying out any work on the de-
vice, place it on a rubber mat.
CAUTION!
The motor starts up automatically again if a
control voltage is applied or speed setpoint is
stored, e.g. following a power outage. Risk of
injury!
1 SAFETY REGULATIONS AND INSTRUCTIONS
These instructions are a component of the device and
must be kept in the immediate vicinity of the device and
accessible to personnel at all times. The personnel
must have read through these instructions carefully and
understood them before beginning any work.
The operating instructions must be handed on if the
device is sold or passed on.
These operating instructions can be duplicated and
distributed to provide information about any potential
hazards.
1.1 Symbols and safety notices
Safety instructions in these instructions are labelled via
symbols and key words that provide information about
the level of hazard involved.
1.4 Electrical current
1.2 Personnel requirements (qualifications)
The device must be transported, unpacked, operated,
maintained and used in any other manner only by specialist personnel who have been instructed and are
authorised to do so.
Only specialist electricians may install the device and
carry out the test run and any work on the electrical
systems.
1.3 Safety regulations
The device is used in the commercial sector. The operator of the device is thus subject to the statutory obligations on occupational safety.
Alongside the safety regulations in these instructions,
the safety, accident prevention and environmental safety regulations that are applicable for the area of use of
the device must be complied with.
Alterations, extensions or modifications are not
permitted without the permission of the manufacturer.
1.5 Electro-magnetic radiation
Influence from electro-magnetic radiation is possible e.g.
in connection with control and regulation devices.
Suitable shielding arrangements should be carried out
on site.
1.6 Storage
Store the packages under the following conditions:
Store dry and free of dust.
Do not expose to any aggressive media.
Avoid mechanical shocks.
Recommended storage period:
max. 1 year

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
WARNING!
Danger from non-intended use!
Every application that goes beyond intended
use and / or other use of the device can lead
to dangerous situations. Therefore:
Use the device only for its intended pur-
pose.
Strictly comply with all information in
these operating instructions.
1.7 Disposal
If no return or disposal agreements have been made,
bring the dismantled components to recycling:
Have metals scrapped.
Give plastic elements to recycling.
Bring electronic components to the appropriate
disposal centre.
Dispose of the remaining components sorted by
the material characteristics.
2 INTENDED USE
The device is designed and constructed exclusively for
the intended purpose described here.
The fan is exclusively used for transporting normal,
dust-free and air-conditioned air and other nonaggressive and non-flammable, non-explosive gases.
Additional applications approved by the manufacturer
that arise from the fan’s optional equipment are described in the customer specification.
3.3 Device drawings
Claims of any kind for damage that have arisen from
non-intended use are excluded.
The operator alone shall be liable for all damage arising
from non-intended use.
3 TECHNICAL DATA
3.1 Rated values
3.2 Mounting data
Screw the fan baseplate on a suitable base using the
four corner holes (max. M12).

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
NOTE!
Lodge a complaint for each defect as soon as
it is identified. Claims for compensation may
be lodged only within the applicable claim
periods.
WARNING!
Suspended loads pose a risk to life!
Raised loads present a risk to life as a result
of falling or parts swaying uncontrollably.
Therefore:
Never step under suspended loads.
Use only the anchor points provided.
Max. stop angle: 60°
Do not attach to protruding machine parts
or to the eyes of fitted components and
ensure that attachments are sitting securely.
Use only permitted hoists and attach-
ments with adequate load-bearing capacity.
Do not use any torn or abraded pulleys
and belts.
Do not place pulleys and belts on sharp
edges and corners, do not knot and do
not twist.
CAUTION!
Danger of cuts!
Wear safety shoes and cut-resistant pro-
tective gloves.
DANGER!
Danger of lethal electrocution from elec-
trical current!
Contact with live parts poses a risk to life.
Switched-on electrical components can
cause uncontrolled movements and lead to
the most severe injuries.
Therefore:
Switch off the power supply before start-
ing any work and secure against unintentional start-up.
Always fit protective conductor
Check protective conductor
Use only wires that satisfy the prescribed
installation requirements in terms of voltage, electricity, insulating material, capacity, etc.
Lay wires such that they do not come into
contact with any moving parts.
NOTE!
Connect the device only to electric circuits that
can be switched off using an all-pole disconnecting switch.
3.4 Transport and storage conditions
Check the delivery immediately upon receipt for completeness and for any transport damage.
In the event of any identifiable transport damage proceed as follows:
Do not accept delivery or only provisionally.
Note extent of damage on transport documents on
the haulier’s delivery note.
Lodge complaints.
4.2 Make electrical connection
4.2.1 Requirements
Check if the data on the type plate matches the
connection data.
Before connecting the device, make sure that the
supply voltage matches the device voltage.
Use only cables that are designed for the current
based on the type plate.
4 CONNECTION AND COMMISSIONING
4.1 Make mechanical connection
Lift the device carefully out of the packaging. Im-
pacts must be avoided.
Check the device for any transport damage. Dam-
aged devices may no longer be mounted.
Mount the undamaged device on a suitable base
based on its application.
Connect pressure line on the pressure tapping on
site (in the duct or pipeline)
4.3 Check connections
Ensure that there is a voltage-free status (in all
phases).
Secure against unintentional start-up.
Check that the connecting wires are fitted correctly.
4.4 Switch on device
Before switching it on, check the device for any externally identifiable damage and that the safety guards are
working.
Apply nominal voltage to the supply.
The device starts automatically.
4.5 Switch off device
Switch off the device via the mains connection.

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
Disconnect mounting bracket with a slight pressure
and turn to the side, as indicated. The nuts are preset and fastened on the bolt. Their purpose is to fix
the lid and may not be removed to release the
mounting bracket.
Remove mounting bracket and lid; store safely.
Feed cable, as shown, through the opening in the
outer coating (1) and the cable screw fitting in the
inner ring (2). Insert cable with suitable radius into
the junction box (3). Connect cable cores to the
appropriate terminals based on the wiring drawing
and colour coding. Tighten all cable screw fittings.
Fit leads based on circuit diagrams in Section 6.
4.6 Procedure

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
WARNING!
The motor starts up automatically again
if a control voltage is applied or speed
setpoint is stored, e.g. following a power
outage.
Risk of injury!
Do not remain in the hazard area of the
device.
Switch off the power supply when working
on the machine and secure against unintentional start-up.
Wait until the device has come to a stand-
still.
NOTE!
If the device has been left standing for a longer period, it is recommended that the device is
started up for at least two hours, to allow any
condensate that may have infiltrated to evaporate and the bearing to be moved.
Switch off, isolate from
the power supply and
remove mechanical
blockage.
Check power supply,
restore supply voltage.
Adjust connection, see
terminal assignment.
Temperature
sensor has
responded
Allow the motor to cool,
find cause of the defect
and rectify it, where
appropriate release
anti-pumping device.
Impeller is
running
untrue
Imbalance in
the moving
parts
Clean device. If there
continues to be an
imbalance after cleaning, replace device.
Improve cooling, if possible. Reset by switching off the supply voltage for
at least 20 s
Ambient temperature too
high
Lower ambient temperature
, if possible.
Inadmissible
operating point
NOTE!
Damage to the device through cleaning.
Malfunction possible.
Do not clean the device with a water jet or
high-pressure cleaner.
Do not use any acid, alkali cleaning
agents or cleaning agents containing solvents.
What needs to be
checked?
Periodic visual inspection
Check the device for damage
Periodic visual inspection
Periodic visual inspection
Secure the
connection leads
Periodic visual inspection
Secure the
protective conductor
Periodic visual inspection
Periodic visual inspection
Contamination, damage,
corrosion
Periodic visual inspection
Voltage output 10VDC, max
1.1mA, not short-circuitproof
Control interface connection
Potential-free status signalling contact, opener in the
event of fault (2A, max
250VAC)
Potential-free status signalling contact, opener in the
event of a fault
5 MALFUNCTIONS, CLEANING, SERVICING
Do not carry out any repairs to the device. Always send
the device to the manufacturer for replacement or repair.
5.2 Cleaning
5.3 Maintenance
5.1 Malfunctions
6 CIRCUIT DIAGRAMS
6.1 Wire allocation
Contact the manufacturer if you have further malfunctions.

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
6.2 Version with EC 3
6.3 Version with EC 010

Installation instructions
Centrifugal roof fan
DRD EC
Version 5 – 05.2014 – subject to errors and alterations
MAICO Ventilatoren · Steinbeisstrasse 20 · D-78056 VS-Schwenningen · www.maico-ventilatoren.com
6.4 Version with EC 230