ENR 20 - Fan Maico - Free user manual and instructions

Product type	Reversible wall fan
Model	ENR 20
Brand	Maico
Main functions	Reversible air extraction and supply
Power supply	230 V ~ 50 Hz
Maximum fluid temperature	+40 °C
Motor protection	Thermal overload protection (automatic reset)
Mounting	Wall or ceiling, surface-mounted or recessed
Minimum wall thickness	105 mm (EN/ENR 20)
Compatible accessories	External shutters MK, BK, AS
Main spare parts	Interior cover, impeller, motor, capacitor, terminal strip
Maintenance	Clean with a dry cloth or vacuum cleaner; do not use aggressive detergents
Cleaning frequency	As needed, at least once a year
Safety	Disconnect the power supply before any intervention; do not insert objects
Intended use	Offices, commercial premises, bars, restaurants, medical practices

Frequently Asked Questions - ENR 20 Maico

How to install the Maico ENR 20 fan?

Installation must be carried out by a qualified professional. Drill the mounting holes, insert the wall plugs, fix the flange sleeve to the wall, then connect the power cable according to the connection diagrams (pages 16-19 of the manual). Mount the external shutter and replace the interior cover.

What is the difference between EN 20 and ENR 20?

The EN 20 model is a simple extraction fan, while the ENR 20 is reversible: it can both extract and supply air, thanks to a reversing switch.

How to clean the ENR 20 fan?

Before any cleaning, disconnect the mains fuse. Remove the interior cover without tools (see figure 2C). Clean the interior parts with a dry cloth or a vacuum cleaner. Never use aggressive or flammable detergents, and do not immerse the device in water.

What to do if the fan suddenly stops?

This may be due to overheating or a motor blockage. The fan restarts automatically after cooling. If the problem persists, disconnect the power supply and have the device checked by a qualified electrician.

Can I install the ENR 20 in a bathroom?

Yes, provided that safety distances are respected and a suitable external shutter is used. The installation must comply with standard VDE 0100 (part 701 for wet rooms).

What accessories are necessary for operation?

The device must be used with an external shutter (MK, BK or AS). For control, a switch, thermostat, hygrostat or transformer can be added as needed.

How to reverse the air flow direction?

Use a reversing switch (FS6, FS7, W/WU1 or S1 according to the diagram). Connect the conductors to terminals 5 (extraction) and 6 (supply) on the terminal strip.

What is the operating voltage?

The device operates at a voltage of 230 V ~ 50 Hz, as indicated on the rating plate.

How to replace a defective part?

Spare parts (motor, impeller, capacitor, etc.) are listed in the exploded view of the manual. To order, specify the manual edition number and the position number. Replacement must be carried out by a professional.

Can the fan be used continuously?

Yes, it is designed for continuous use. However, ensure compliance with the maximum fluid temperature (40 °C) and regular maintenance.

USER MANUAL ENR 20 Maico

Close-up of a white square fan with a circular vent, showing internal horizontal slats and a central hole (no text or symbols)

Technical diagram of a multi-stage air conditioning system with labeled components and parts, including fan, fan blade, and fan blade assembly.

2E 3 2G 5 6 D 2F 9 1 3 9.3 S 9.4 T5 1 1 Nm (3x) 2 2.1 2G MAICO 2H

1. Warning symbols in this manual

DANGER

Danger to life!

Non-observance can lead to death or serious bodily injuries.

CAUTION

Danger of injury/Property damage!

Non-observance can lead to minor or more serious bodily injuries or property damage.

2. Product information

Equipment overview, Figure 1

Spare parts are printed bold. With spare part orders, please quote the manual print number (see rear of envelope), the unit type and the corresponding item number.

1 Internal cover, complete

1.1 Protective bar

2 Terminal box complete

2.1 Sealing

2.2 Screws (3 pieces)

3 Connecting flange complete

4 Capacitor (ENR..)

5 Terminal block (EN.. 3-pin, ENR.. 4-pin)

6 Terminal block (3-pin)

7 Motor, complete

8 Impeller, complete

9 External shutters (= accessory)

Shutter "MK" (see figure) Shutter "BK" or airstream-operated external shutter "AS" (no picture)

9.1 Lamella

9.2 Gear motor

9.3 Connecting cable

9.4 Cable conduit

D Dowel (to be supplied by the customer)

S Fixing screw (to be supplied by the customer)

X Rating plate

Acknowledgements

© Maico Elektroapparate-Fabrik GmbH. This instruction is a translation of the German original operating instructions. We are not responsible for mistakes or printing errors and retain the right to make technical modifications without giving prior notice.

Product description

EN.. Fans for air extraction. Only in combination with external shutter "MK", "BK" or "AS".

ENR.. Fans with reversing mode for air extraction or ventilation. Only in combination with external shutter "MK" or "BK".

● EN.. and ENR.. fans are equipped with a thermal motor overload protection.
● Fans are switched on or off with a switching component that is to be provided by the customer, see wiring diagrams on page 16 to 19.

3. Technical Data

See rating plate.

4. Environmental conditions and operating limits

● Maximum permitted temperature of the air medium: +40°C
- Sufficient supply air intake must be ensured during operation with air-ventilated fireplaces. The maximum permitted pressure difference is 4 Pa.

5. Essential safety instructions

General safety instructions

• Read the safety instructions through carefully before commissioning.
• Keep the instructions.
  ● The device should not be used as a toy.
  ● Installation is only permitted when carried out by trained specialists.
  ● Electrical connections and repairs only permitted when carried out by trained specialists.
• With electrical and equipment installation the relevant regulations must be observed, particularly VDE 0100 with the corresponding parts. In rooms with baths or shower units, for example, this would be Part 701.
• Only connect the unit to a permanent electrical installation with a supply cable from 1.5...2.5 mm ^2 . This must be equipped with a mains isolation device with contact openings of at least 3 mm at each pole.

● The fan unit may only be operated using the voltage and frequency shown on the rating plate.
- Disconnect the unit completely from the power supply before removing the terminal box cover [2]. Also switch the mains fuse in the fuse box off.
● Modifications and alterations to the unit are not permitted and release MAICO from any guarantee obligations and liability.
● Never operate the fan without the internal cover and only when the external shutter is completely installed (protection against accidental contact with the impeller in accordance with EN 294).

Intended use

• EN.. and ENR.. fans for air extraction at offices, business and commercial premises, restaurants, doctors practices, etc.
  ● ENR.. fans, also for ventilation.
  ● For surface installation on walls, ceilings or pitched roofs.

Predictable misuses

The fan unit should not be used:

• close to flammable materials, liquids or gases.
  ● for the conveying of chemicals, aggressive gases or vapours.
  ● in explosive atmospheres.

Safe and correct practices during operation

● Danger of injury Do not insert any objects in the unit.
● Danger from self-turning impeller Do not get too close to the unit to avoid hair, clothing or jewellery being drawn into the unit.

6. Installation

Faulty operation and unit damage caused by a rubbing impeller with incorrect installation.

Install the connecting flange so that it is not under tension.

Make sure there is a level seating.

Important notes

● Wall thickness EN/ENR 20, EN/ENR 25 = min. 105 mm

Wall thickness EN/ENR 31 = min. 130 mm

● Make sure there is sufficient space to the wall or ceiling.
- In order to guarantee the degree of protection (IP value), the cable grommets [T...] must be drilled through/pierced correctly, i.e. with a circular hole that is somewhat smaller than the cable diameter.
● Never dismantle the external shutter.
- Only mount the external shutter on a level surface in order to guarantee the shutter function.

Wall mounting (Figures 2A and 2H)

A Mark and drill the holes for the plugs. Please refer to Figure 2A for the correct hole spacing for the connecting flange.
B Wall breakthrough, install power cable [L] (surface mounted „AP“ or recessed mounted „UP“) and wall sleeve „WH“, as required). Lay an empty ducting [9.4] with a slight incline towards the outside, for an electrically operated external shutter.
C Remove the internal cover [1]; the cover can be removed from the connecting flange [3] without using any tools. To do this, hold onto the connecting flange, open the internal cover [1] from the bottom (see ①) and move it upwards (see ②). Then remove the terminal box cover [2]. Remove the protective bar [1.1] first in the case of surface connection.
D Make a circular hole in the corresponding grommet [T...] in the connecting flange and feed the power cable through it.
E Fix the connecting flange [3] to the wall with suitable fixing material.
F Install the external shutter in line with the corresponding instructions. Feed the connection cable through the conduit [9.4] in the connecting flange and then through the black grommet [T5]

into the terminal box, in the case of an electrically operated external shutter. In order to stop moisture getting into the terminal box, make sure that the hole in the grommet is circular and slightly smaller than the diameter of the connection cable.

G Connect up the unit electrics, see wiring diagrams on Pages 16 to 19.

Danger to life from electric shock!

Switch the mains fuse off.

DANGER

Unit damage in the case of short-circuits!

CAUTION

Cut off and insulate PE conductor and individual cable cores that are not required.

Connect the fan to terminal block [5] and the external shutter to terminal block [6] by reference to the corresponding circuit diagram. The connections to terminal block [6] are not necessary in the case of „AS“ airstream operated external shutters.

The degree of protection (IP value) is only guaranteed if the cables are fed through correctly using the intended cable grommets [T1]...[T5].

H Put the terminal box cover [2] on and screw it into position, ensuring that the sealing [2.1] is correctly located.

Important: Tighten the 3 fixing screws of the terminal box cover with a torque of 1 Nm.

Locate the internal housing [1] into position. To do this, hang the internal housing on the top of the connecting flange [3] and then click it down into position. Don't bend or distort it.

- Switch the mains fuse on. Carry out a function test.

Ceiling installation (no picture)

- Carry out the ceiling installation as described in the wall mounting section.

Danger of short-circuits and unit damage by a build-up of condensation in the fan housing.

CAUTION

Thermally insulate the ventilation ducts correctly.

- Drill through the internal cover [1] at position [B] carefully and with a suitable drill bit. The hole prevents the build up of damp and bacteria in the fan housing.

B 20 M

Observe the dimensioned drawing. Drill hole [B] with a diameter of 3.5 mm, 20 mm to the left of the housing marking [M].

- Secure the internal cover [1] with the supplied screw at marking [M]. 3 × 10 ~mm screw is secured in the internal cover with sticky tape.

7. Maintenance

The unit is maintenance-free.

8. Cleaning

Danger to life! Unit is powered up.

Switch the mains fuse off. Do not flood the unit with liquid.

- Remove the internal cover [1] as shown in Figure 2C. The cover can be removed from the connecting flange without using any tools.

Under no circumstances should the internal cover be pulled from the top or by using the internal grille.

- Clean the internal part with a dry cloth or use a vacuum cleaner if required. Open the flaps upwards to clean the external shutter.

Never use any cleaning agents that may be injurious to health or that are abrasive or easily inflammable.

- Finally, position the internal cover [1] as shown in figure 2H.

Do not clean the internal cover in a dishwasher.

Danger to life! Unit is powered up.

Switch the mains fuse off.

A malfunction can occur, for example, if the airstream temperatures are too high or if the fan motor is blocked. The overload protection device reacts and switches the fan off.

- If the fan fails to operate, always check whether mains power is switched on. If necessary, have the fan's wiring checked by an electrician. Before starting such work, make sure the fan is completely disconnected from the mains.

- Allow the fan motor to cool down and then the fan will switch back on automatically (the thermal switch resets automatically).

- If the unit fails to restart or if it breaks down again, remove the power and call on the services of a specialist.

10. Disposal

Not in domestic waste.

The unit contains in part material that can be recycled and in part substances that should not end up as domestic waste.

- Dispose of the unit once it has reached the end of its working life according to the regulations valid where you are.

Ventilateurs muraux EN 20/ENR 20, EN 25/ENR 25 and EN 31/ENR 31

- Conserver la notice.

• switch
• TH.. thermostat
• HY5 hygrostat
• EAQ air quality controller

* Cable only for MK.. shutter

TRE 5-step transformer (On/Off, 5 speeds)

* Cable only for MK.. shutter

- with On/Off switch and reversing switch

extraction/ventilation
- Terminal 5: air extraction
- Terminal 6: ventilation

* Cable only for MK.. shutter

S1 Marche/Arrêt

FS6 Step switch (air extraction/ventilation, 2 speeds)

FS7 Reversing switch (air extraction - ventila

* Cable only for MK.. shutter

W/WU1 Reversing switch with On/Off

* Cable only for MK.. shutter

TRE 5-step transformer (On/Off, 5 speeds)

W/WU1 Reversing switch (air extraction - 0 - ventilation)

* Cable only for MK.. shutter

- with TRE... 5-step transformer and reversing switch

TRE 5-step transformer (On/Off, 5 speeds)

S1 Reversing switch (air extraction – ventilation)

* Cable only for MK.. shutter

- with TRE..S 5-step transformer and ESS 20 5-step switch

TRE...S 5-step transformer (switch cabinet installation)

ESS 20 5-step switch (On/Off, 5 speeds)

S1 Reversing switch (air extraction/ventilation)

* Cable only for MK.. shutter