Maico ERK 100 ST Service manual

Duct fans
ERK 100
ERK 100 T
ERK 100 S
ERK 100 ST
ERK 125
ERK 125 T
ERK 150
ERK 160
ERK 200
Mounting and
operating instructions
www.maico
-ventilatoren.com

VENTILATOREN

en │Table of contents
2
ERK ...
Table of contents
Additional information...................................2
1. Scope of delivery...................................... 3
2. General notes........................................... 3
3. Product information.................................. 4
3.1 Equipment overview, Fig. A...............4
3.2 Product description ........................... 4
3.3 Intended use ..................................... 5
3.4 Predictable misuse............................5
4. Technical data.......................................... 5
5. Safety instructions....................................6
5.1 General ............................................. 6
5.2 Safe and correct practices during
operation.................................................6
6. Transportation, storage............................ 7
6.1 Transport........................................... 7
6.2 Storage ............................................. 7
7. Installation preparations........................... 7
8. Mounting.................................................. 8
8.1 Installing fan...................................... 8
8.2 Electrical connection ......................... 8
8.3 Speed control with speed controller .. 9
8.4 Operation with step transformer...... 10
8.5 Commissioning ............................... 10
9. Maintenance .......................................... 10
10. Fault rectification.................................. 10
11. Dismantling.......................................... 12
12. Disposal............................................... 12
13. Wiring diagrams................................... 12
Additional information
Go directly to the product
with a
smartphone.
In the Internet under
maico-ventilatoren.com.
Acknowledgements: © MaicoElektroapparate-Fabrik
GmbH.
English translation from the original German operating
instructions.We cannot be held responsible for mistakes
or printing errors and retain the right to make technical
modifications without giving prior notice
. The brands,
brand names and protected trade marks that are
referred to in this document refer to their owners or
their products.

1. Scope of delivery
ERK duct fan including mounting foot ●
(pre-installed)
Accessories bag containing fastening ●
material
(4 fastening screws and 4 dowels) in the
terminal box
Mounting and operating instructions ●
2. General notes



Read these installation and
operating instructions carefully
before using the fan for the first
time. Follow the instructions. Keep
these instructions safe for use later
on.

3. Product information │en
4
Installation staff
Installation may only be carried out by
specialists who have the necessary
knowledge and experience in ventilation
engineering. Only qualified electricians are
permitted to make the electrical connections.
They are trained in electrical engineering and
are aware of the risks and consequences of
an electric shock.
Symbols used
DANGER
Direct risk of danger. Failure to
observe will result in severe
injury or death.
CAUTION
Possibly dangerous situation
which could result in minor to
moderate injuries.
NOTICE
Possible situation which could
cause damage to the product or
its surroundings.
INFO symbol indicating
important information and tips.
● Bullet point for information on the
corresponding subject.
1.
Instructions. Follow the
instructions given in the order
stated.
3. Product information
3.1 Equipment overview, Fig. A
1 Fan housing with motor and impeller
2 Connection socket
3 Terminal box
4 Terminal box cover
5 Mounting foot
6 Clamp with screw and retaining ring
P Air flow direction arrow
T Rating plate
3.2 Product description
Models
ERK ..: Duct fans with guide vanes, units ●
with nominal sizes of DN 100, DN 125,
DN 150, DN 160 or DN 200.
ERK 100 T, ERK 125 T: like ERK .., also ●
with follow-up relay (timer),
adjustable from 3 to 15 minutes. Units with
nominal size of DN 100 or DN 125.
ERK 100 S, ERK 100 ST: Duct fans with ●
guide vanes, powerful model. ST model
with follow-up relay
(timer), adjustable from 3 to
15 minutes. Units with nominal size DN
100.
Product features
Fans for air extraction or ventilation, ●
depending on installation position (air
flow direction arrow).
For the supply of small up to medium air ●
volumes.
With inlet and outlet side connection ●
couplings for direct installation in the
ventilation ducts.
With diagonal impeller and downstream ●
stator. Type ERK 100 with axial impeller.
Asynchronous motor, with 1, 2 or 3 speeds ●
depending on unit type.
●1 level: ERK 100, ERK 100 T
●2 levels: ERK 100 S, ERK 100 ST, ERK
125, ERK 125 T, ERK 150, ERK 160
●3 levels: ERK 200
Alternatively speed can be controlled
using a speed controller (phase angle) or
step transformer.
The high performance level should
be connected when using speed
controllers/transformers.
The speed of timer versions ERK
100 T, ERK 100 ST and ERK 125 T
cannot be controlled.
The unit is switched on or off with an ●
optional switch.
ERK .. T: Unit overrun time can be
●
adjusted. Setting range is 3…15 minutes.
After being switched off with the optional
switch, the fan continues to run for the set
time and then switches off automatically.
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en │3. Product information
5
Thermal overload protection
The fan motor has thermal protection
(temperature sensor in the motor winding).
The overload protection automatically
switches the fan off in the event of
overheating.
The fan must remain switched off long
enough for the motor and temperature limiter
to cool down, before starting the fan back up.
Depending on size and temperature
conditions, it may take up to 10 minutes to
cool down. Only then can the unit be
switched back on.
3.3 Intended use
ERK are duct fans for usage similar to that ●
found in domestic properties.
They can be installed in any position. ●
The fans are used for air extraction or ●
ventilation, for example in productions
sites, workplace applications, storage
rooms, labs, workshops, rest rooms or
rooms without windows.
IP X4 type protection is only satisfied ●
when installed in ventilation ducts, on the
inlet and outlet sides with at least 1 m of
duct.
They can only be operated with an ●
ERK fan installed directly in the duct.
Folded spiral-seam ducts of a nominal size
appropriate to the unit are permitted for
the duct.
The ERK fan must be permanently ●
installed and the electrical supply cable
permanently laid.
A mounting foot [5] should be used for ●
installation. The mounting location must
demonstrate sufficient load-bearing
capacity.
3.4 Predictable misuse
Maico is not liable for damages caused by
use contrary to the intended purpose. Under
no circumstances should the unit be
used:
for conveying steam-saturated air or ●
greasy air,
for conveying solid particles which may ●
stick to the fan.,
close to flammable materials, liquids or ●
gases,
for conveying chemicals, aggressive ●
gases or vapours,
in explosive atmospheres, ●
outdoors, ●
with a free air entry or exit, if there is no ●
protection against accidental contact with
the impeller
in accordance with EN ISO 13857.
IP X4 type protection is not satisfied
when the ventilation duct on the air
outlet side points straight up and
there is no duct bend to prevent the
supply of moisture.
4. Technical data
For technical data, refer to the rating plate.
Degree of protection IP X4
Temperature class B
Weight 1.2 to 4.5 kg,
depending on unit
variant
Temperature of air
medium up to 40 °C
Information
Dimensions and characteristic curves ●
Internet, catalogue.
Internet maico-ventilatoren.com or ●
using the QR code on page 2.
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5. Safety instructions │en
6
5. Safety instructions
5.1 General
Read these operating ●
instructions carefully before
mounting and commissioning.
Assembly and electrical ●
connection may only be
undertaken by trained
specialists in accordance with
Chapter 2.
The unit may only be ●
operated using the voltage
and frequency shown on the
rating plate.
The degree of protection ●
stated on the rating plate is
only guaranteed if installation
is undertaken correctly and if
the cables are correctly
guided into the terminal box.
Only connect unit to ●
permanently wired electrical
installations with NYM-O or
NYM-J, (3 x 1.5 mm²) cables.
Additionally, a mains isolation
device with contact openings
of at least 3 mm at each pole
must be installed.
Only operate the unit when it ●
is completely installed.
Ensure that foreign bodies
●
cannot be sucked into the unit
and duct.
Never operate the device
●
without a protective grille
(Maico SGR) with a free
inlet/outlet. The impeller must
have protection against
accidental contact (EN ISO
13857).
Ensure a sufficient supply air ●
intake.
Modifications and alterations ●
to the unit are not permitted
and release the manufacturer
from any guarantee and
liability.
5.2 Safe and correct practices
during operation
Danger of injury from
objects in the impeller.
Do not insert any objects
in the unit.
Danger of injury from
rotating impeller. Do not
get too close to the unit,
to avoid hair, clothing or
jewellery being drawn into
the unit.

en │5. Safety instructions
7
This fan unit can be used by ●
children aged 8 and above,
and by people with reduced
physical, sensory or mental
capabilities or by persons with
insufficient experience or
knowledge provided they are
supervised by a person
responsible for their safety, or
they have been instructed
about the safe operation of
the unit and can understand
the resulting risks thereof.
Children must not play with
the unit. Cleaning and
maintenance must not be
carried out by children without
supervision.
6. Transportation, storage
6.1 Transport
Information
Use appropriate means of transport for ●
transport purposes.
Maico accepts no indemnification or ●
warranty claims in the event of improper
transport.
6.2 Storage
Only store fan horizontally in a suitable, ●
dry room: ambient temperature
- 10 to + 60 °C.
Before installing, check that the motor ●
bearing is working properly.
Maico accepts no liability for corrosion ●
damage caused by improper storage, e.g.
storage in a damp room.
7. Installation preparations
Information
For installation, we recommend flexible ●
fixing cuffs (type ELR). These prevent the
transmission of vibrations to the duct
system.
If duct system is already in place, ●
cut through folded spiral-seam duct at
installation location. Take account of
spacing for fixing cuffs.
Dispose of packaging material in ●
accordance with Chapter 12.
Lay a permanent power cable to the ●
installation location.
With free inlet, fit a SGR type protective ●
grille appropriate for the unit.
Always note the relevant specifications for ●
electrical installations and when fitting
equipment. In Germany, observe DIN VDE
0100 and the corresponding parts in
particular.
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8. Installation ‒Electrical connection │en
8
8. Mounting
8.1 Installing fan
CAUTION
Danger from incorrect
installation location or incorrect
attachment.
1. Only fit in places with sufficient
load-bearing capacity.
2. If necessary, the customer
should provide fastening
material suitable for the
installation location.
1. Remove pre-installed mounting foot [5] by
opening both clamps and taking out fan
housing [1] and connection sockets [2].
2. Fit mounting foot [5] at installation location
using appropriate fastening material.
Make sure that there is free access
to terminal box [3].
3. Slide folded spiral-seam ducts suitable for
the diameter of the connection sockets
onto the two connection sockets on the
inlet and outlet sides. If necessary, first
attach flexible fixing cuffs onto connection
sockets.
4. Insert fan housing and two connection
sockets in grooves of the two clamps.
Close the clamps and screw down.
Ensure that the components do not
twist and are inserted correctly in the
clamp grooves in order to prevent
leakages.
5. Fit suitable insulation, sound-deadening
and installation material.
8.2 Electrical connection
DANGER
Danger to life from electric
shock.
Prior to accessing the
connection terminals, switch off
all supply circuits. Switch off
mains fuse, secure against
being accidentally switched back
on and position a visible warning
sign.
NOTICE
Risk of damage to unit in the
event of short-circuits.
Insulate any unnecessary cable
cores.
Information
ERK fans are not approved for ●
operation with frequency converters.
Speed can be controlled using a speed ●
controller (phase angle) or step
transformer. For speed controller
accessories online or valid Maico
catalogue.
Units with ERK 100 T, ERK 100 ST and ●
ERK 125 T timers have an extra PCB with
potentiometer in the terminal box. This can
be used to set the follow-up relay (timer)
from 3 to 15 minutes.
The speed of timer units cannot be
controlled.
The high performance level should be ●
connected when using speed
controllers/transformers.
1. Switch off mains fuse and prevent from
being started up again. Attach warning
sign.
2. Remove terminal box cover [4] and
accessories bag.
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en │8. Installation ‒Electrical connection
9
NOTICE Danger of short-circuits and
damage to the unit.
Water/dampness may
penetrate the terminal box if
the power cable is
introduced incorrectly
(leaking) or if the cable
grommet is not fitted
correctly.
Pierce cable grommet such
that it can fully surround the
power cable and makes close
contact in the terminal box.
3. Pierce cable grommet [8] in terminal box
with a nozzle pin.
4. Guide the power cable into the terminal
box such that the cable grommet fits
around the cable sheathing completely.
If necessary, seal the cable grommet on-
site.
5. Wire fan to the terminal block according to
the wiring diagram (chapter 13). Note
the screws' tightening torque of 0.7 Nm.
6. Secure power cable with tension relief [7]
to ensure that the power cable is seated
firmly.
7. On ERK .. T units, set the unit overrun
time with potentiometer [9] (setting range 3
to 15 minutes).
8. Fit optional on/off switch.
9. Connect other optional accessory
components (chapters 8.3 and 8.4).
NOTICE
Unit damage due to moisture
in the event of improperly
attached terminal box cover.
1. The terminal box cover
sealing must be flush all the
way round the terminal box.
2. Tighten screws to a tightening
torque of 1.0 Nm.
10. Fit terminal box cover.
8.3 Speed control with speed
controller
ERK units (other than ERK .. T units) can be
controlled in an infinitely variable manner
using a speed controller appropriate to the
unit type (online, catalogue).
The technology used in the phase
angle controller may cause humming
noises.
NOTICE
The fan will stop and suffer
functional problems if the
output voltage on the speed
controller is too low.
1. Observe information in the
speed controller operating
instructions.
2. Always set the minimum
speed on the speed controller
such that the fan motor starts
up again after power failure.
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8. Installation ‒Electrical connection │en
10
8.4 Operation with step transformer
The speed of ERK units (other than ERK .. T)
can be set gradually with a 5-step transformer
(type TR or TRE) appropriate to the unit type
(online, catalogue).
ERK unit:
1 level: ERK 100, ERK 100 T ●
2 levels: ERK 100 S, ERK 100 ST, ERK ●
125, ERK 125 T, ERK 150, ERK 160
3 levels: ERK 200 ●
8.5 Commissioning
1. Check that all screw connections are tight.
2. Check air channel for dirt and clean if
necessary.
3. Check that connection data matches
technical data on the unit (rating plate 
unitinstructions envelope).
4. Remove protection against switching back
on and switch on mains fuse.
5. Run function test. Check that the impeller
runs quietly and ensure this if necessary. It
is also important that the air can flow
unhindered.
6. Switch off unit.
9. Maintenance
The unit is maintenance-free.
10. Fault rectification
Call on the services of a trained electrician ●
any time there is a fault.
Repairs should only be carried out by a ●
trained electrician.
DANGER
Danger to life from electric
shock.
Prior to accessing the connection
terminals, switch off all supply
circuits. Switch off the mains
fuse, secure against being
accidentally switched back on
and position a visible warning
sign.
Fault Cause, measure
Fan does
not switch on. No mains voltage.
Check whether the mains
fuse has failed. Switch on if
necessary.
Motor's thermal
overload
protection
switches the fan
off.
Motor too hot.
Leave the unit switched off
until the motor and the
temperature limiter cool
down. Cool-down time can
be up to 10 minutes. Only
then, switch the unit back
on.
Fan does
not switch on.
Impeller blocked.
Repairs may only be
carried out by a trained
specialist: Check impeller
and
clean if necessary.
Deposits on the
impeller and in
the housing
caused by dust
in the air.
Call on the services of a
trained electrician. Install air
filter in the duct system.
Under no circumstances
should the inside of the unit
be cleaned with water or a
high-pressure cleaner.
Impeller not
turning. Switch off unit. Ensure that
the impeller is not blocked
by foreign bodies.

If the fault still continues or occurs
again, disconnect the fan from the
power supply at all poles.
Let a certified electrician determine
the cause of the fault and eliminate
it.
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en │11. Dismantling
12
11. Dismantling
Dismantling may only be undertaken
by a trained electrician (chapter
2).
DANGER
Danger to life from electric
shock.
Prior to accessing the connection
terminals, switch off all supply
circuits. Switch off the mains
fuse, secure against being
accidentally switched back on
and position a visible warning
sign.
1. Switch off mains fuse, secure and fit
warning sign.
2. Remove folded spiral-seam ducts from
fan.
3. Remove the terminal box cover.
4. Remove all cables.
5. Remove fan.
12. Disposal
Do not dispose of in domestic
waste. The unit contains in part
materials that can be recycled and in
part substances that should not end
up in the domestic waste.
Dispose of the unit once it has reached the
end of its service life according to the
regulations valid where you are.
13. Wiring diagrams
ERK 100
ERK 100 S, ERK 125,
ERK 150, ERK 160
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13. Wiring diagrams │en
13
ERK 100 T
ERK 100 ST, ERK 125 T
ERK 200

de │gb
Maico Elektroapparate-Fabrik GmbH • Steinbeisstr. 20 • 78056 Villingen-Schwenningen •
Germany • Service [phone] • [e-mail]
07.14_Es
0185.1173.0000_RLF.4_07.14_DSW