HEYLO HL 400 Design Air Cleaner

EC Declaration of Conformity, IIA
In conformity with EC Machine Directive 2006/42/EC,
For device series: Air cleaner
Type: HL 400
HEYLO GmbH, Im Finigen 9, 28832 Achim, Germany, declares that, if they are fitted, maintained and used in conformity with the operating instructions and the generally accepted engineering standards, the machines mentioned are in keeping with the fundamental safety and health requirements of the “Machine Ordinance” as well as with the regulations and standards mentioned hereinafter.
Applicable EC directives:
- Safety of machines 2006/42/EC
- Electro-Magnetic Compatibility (EMC) 2014/30/EU
- RoHS 2011/65/EU
The declaration loses its validity in case of unauthorized changes to the machines.
Applied or partly applied standards:
DIN EN 60 335-1
DIN EN 60 335-2-65
Achim, 27.07.2020
General aspects
ATTENTION: Always read before commissioning!
Please carefully follow the instructions in the operating manual. Non-observance will invalidate the warranty. The manufacturer accepts no liability for any damage or consequential damage arising from this.
The HL 400 is a mobile air filtration unit. The air is drawn in from the environment and passed through a multi-stage filtration system. The filter stages consist of a pre-filter, two 2in1 combi-filters for gases and particles as well as a plasma generator and a UV lamp. The individual stages have the following functions:
Stage 1
Pre-filter
An aluminium filter is used as a pre-filter. The pre-filter filters coarse dust particles of more than 5 micrometres, such as house dust, dandruff, pollen. The filter can be washed out with water and can therefore be used several times. HEYLO recommends replacing the pre-filter annually
2nd + 3rd stage
Charcoal filter:
The formaldehyde filter with activated carbon cleans the air of unwanted odours, gases and substances. It also cleans the air of harmful formaldehyde. The substances are absorbed by the activated carbon.
Variant 1: H14 filter according to EN1822
HEPA filters of class H14 are used, among other things, in medical areas such as intensive care units and laboratories, in clean rooms and in other hygienic areas. The respective application is decisive for the selection of the filter class. The filters are EN-compliant and certified. H14 filters catch 99.995 % of all suspended particles from a size of 0.1 µm, so that virus filtering is possible and e.g. coronaviruses are rendered harmless.
Variant 2: E11 filter according to EN1822
EPA filters of class E11 are used in living and working areas, among others. The respective application is decisive for the selection of the filter class. The filters are EN-compliant and certified. E11 filters capture 99.5 % of all suspended particles from a size of 0.1 µm, thus enabling dust, bacteria and pollen filtration.
4th stage
Sterilising UVA light
UV sterilisation with 365 nanometre UV wavelength light can kill a variety of airborne bacteria. The UV disinfection lamp is usually used for air, surface and water disinfection. It can purify the air, eliminate musty odours as well as produce a limited amount of anions. This makes the air fresh and avoids the spread of viruses in the air or on surfaces viruses. According to the World Health Organization, the corona virus, bird flu virus, influenza virus and legionella bacteria are all larger than 20 nanometers.
5th stage
Ionisation
By applying strong electric fields, ionisers can electrically charge individual air particles and thus increase the ion concentration in the room air. The charged particles are more reactive and can thus destroy odour molecules and other pollutants. At the same time, differently charged particles attract each other and form larger clumps that sink to the ground faster and are easier to filter out of the air.
Scope of delivery
- 1 x HL 400 filter unit
- 1 x prefilter
- 1 x remote control
- 1 x instruction manual
(combi filter is not included in the scope of delivery)
Safety instructions
Target group: The manual is intended for the user who sets up and operates the device. Copyright: Reproduction of the manual in whole or in part is only permitted with the written consent of HEYLO GmbH!
Reservation: HEYLO GmbH reserves the right to make changes and improvements to the product and manual at any time without prior notice.
Disposal: The device is designed for many years of operation. If it is to be disposed of, this must be done in an environmentally friendly manner in accordance with the relevant legal regulations. Keep away from children: Do not allow children to play with or near the device.
Electrical connection: The HL 400 air purifier is designed for operation with 230 V / 50 Hz and 60 Hz. The connection must be fused with 16 A.
Use only with Schuko plugs and Schuko sockets! Sockets used must be grounded and protected by a residual current circuit breaker with at least 30 mA.
Protect the power cable from damage: Never use the instrument with a damaged power cable. If the power cable is damaged, it must be replaced with a cable of the same type and rating.
Extension cords: Use only approved extension cords!
Handle with care: Do not drop or throw the unit, as damage to components or wiring may result. Work on a solid surface: Always place the device on a firm, level surface.
Keep dry: Do not operate the unit in puddles or standing water. Do not store or operate outdoors. If the electrical wiring or any part of the unit becomes wet, dry the unit thoroughly before reuse. Keep air openings clear: Do not cover or block the air inlets and outlets.
Environment: Do not use in potentially explosive atmospheres
Application / Areas of application
Numerous pathogens are normally found in untreated indoor air. This group includes mold spores, bacteria, animal hair and, above all, house dust allergens (mite feces, excrement), but also heavy metals, soot and mineral fibers. Particularly on warm days or during the heating period, large quantities of these suspended particles develop and are swirled around with the house dust in the room air. After being absorbed through the respiratory tract, the particles then come into contact with our mucous membranes and trigger the familiar allergy symptoms.
HEYLO air purifiers can significantly reduce the concentration of these suspended particles and gases to produce healthy indoor air.
The devices are typically used in the following areas:
Private homes, offices, conference and training rooms, schools and government offices, medical practices and fitness centers. In all areas where people are present, the devices can significantly improve air quality. In areas where pathogens such as bacteria and viruses may be present, the risk of infection can be reduced.
Putting into service / operation

![]() | To turn the device on/off, press the power button to start the device. Start it in automatic mode. In this operating mode, the motor speed is controlled by a sensor. The speed of the fan motor regulates itself automatically in three stages, depending on the air quality. The more particles there are in the air, the higher the speed of the fan motor. To switch off, press the key again and the device goes into stand-by mode | |
![]() | Press the “Speed” button to change the fan speed. You can select 3 air performance levels by tapping repeatedly. | |
![]() | Ionization function: The “Anion” button is used to switch the ionization function on and off. | |
![]() | The “UV” button is used to switch the UV sterilization function on and off. | |
![]() | Press the “Sleep” button to manually operate the unit at the quietest level. The automatic mode is then terminated. All lights and displays will switch off and the fan will run at the lowest speed. NOTE: The second function of the sleep button is to reset the filter replacement indicator. When it is on, press the button for 3-5 seconds and the filter indicator is reset. NOTE: the filter indicator is only active during operation. In stand-by mode, the light indicates the WIFI status. | |
![]() | When the unit is switched on, you can use the “Timer” button to let the unit run automatically for a certain time. The period can be selected from 30 minutes to 12 hours. You press the button repeatedly until the desired time appears in the display. 5 seconds after the last press, the unit switches back to the air quality display. (PM2.5 value). To switch the timer function off again, press the button for 5 seconds. If you only press briefly, you can read the remaining timer time. |
![]() | Press the “Child Lock” button to activate the child lock. Press and hold the “Child Lock” button for 5 seconds to cancel the function NOTE: To display the filter run time, press and hold the “Child Lock” (before entering an operating mode) to see that the filter has been used between 0- 1500 hours. After displaying for 5 seconds, it will automatically exit the display. | ||||
![]() | When the product is switched on, pressing the “AUTO” button activates the negative ion generator and the UV lamp and the working level is set depending on the sensor data. (The symbol lights up while the product operating in automatic mode and disappears otherwise). If the user changes the blower speed while the automatic mode is active, this mode is automatically terminated. | ||||
| Fan stage | PM2.5 value | Fan speed | Display colour | ||
| 1 | less than 120 | 430 | green | ||
| 2 | 121-250 | 600 | orange | ||
| 3 | 251-500 | 900 | red | ||
![]() | Light sensor: In automatic mode, the product is put into sleep mode when the ambient light falls below the value <5×. It exits the sleep mode again, after the ambient light exceeds <5× for 3 minutes and then returns automatic mode. | ||||
| WIFI | For the operation of the WIFI function, please refer to the WIFI quick start guide included with the device | ||||
![]() | This product comes with a remote control powered by 3V lithium cells. (Please remove the cells when not using the remote control for a long period of time). The controls on the user interface on the unit and on the remote control are directly similar: all functions and operating modes are basically identical.![]() | ||||
Display: 
Filter change (filter installation)
The filter change is indicated by the device.
At every 320 hours, the filter replacement light will light up (around 2x per month). After cleaning the prefilter, press and hold the “sleep” button for 5 seconds to clear the replacement reminder. When the timer reaches 1500 hours, the filter replacement light will flash (around 2x per year). After changing the main filter, hold the “sleep” button to clear the reminder and reset the timer function.
![]() | Remove the front cover. |
![]() | Remove the prefilter. Open the retaining screws (turn them upwards) and remove the filters. NOTE: Before first use, the filters must be removed from their protective packaging. |
![]() | First, insert the main filter (carbon filter/HEPA filter H14/E11). NOTE: Please make sure that the retaining strap points outwards. |
![]() | Second, insert prefilter (aluminium prefilter) NOTE: Please make sure that the retaining strap points outwards. |
![]() | When all filters are in place, tighten the two retaining screws in the upper section and close the front cover. |
Disposal of the filters: The filters can be disposed of in household waste.
If the unit has been used in polluted air, the used filters must be packed airtight in bags and disposed of properly. In case of contamination with viruses, please allow for a waiting period in which the viruses can die off or wear gloves and protective mask (min. FFP2) when changing the filter.
Cleaning and filter change
Prefilter: Aluminium prefilter (coarse dust filter)
- Prefilter for the main filters
- Filter for specific large dusts up to 3 µm
- Deposition efficiency 85-98% at 10 µm and 30-55% at 1 µm
- Absorption of coarse dust
Cleaning and filter change:
Cleaning 2 x per month and filter change every 2 years
Optional H14 main filter: Virus filter (H14) and active carbon filter 
- HEPA H14 filter according to EN1822
- Filter for chemical compounds and gases
- separation efficiency 99,9%
Cleaning and filter change:
Filter change 1 x per year
Optional E11 main filter: Fine dust filter (E11) and active carbon filter 
- EPA E11 filter according to EN1822
- Filter for chemical compounds and gases
- separation efficiency 95%
Cleaning and filter change:
Filter change 1 x per year
Ionizer
The ionizer sits inside the unit and cannot be replace
If cracking noises occur during operation, you should remove dust from the head (as described in the picture) with a brush.
Particle sensor
For the air quality display, a sensor measures the particles in the room air. This sensor should also be cleaned regularly.
To do this, open the side flap (Fig. 1) and carefully wipe the sensor clean with a cotton bud
Installation guidelines
For commercial use, the legal regulations of the respective country must be observed for the installation and use of the HL 400 air purifier. In Germany, the following regulations, among others, must be observed:
- Workplace Ordinance §§ 5 and 14
- Workplace directive ASR 5
- Accident prevention regulations VBG 43
- Ordinance on Hazardous Substances from 01.01.2005
- BGR 128 (Employer’s Liability Insurance Association)
- TRGS 519 (for work with asbestos)
(available from: German Information Center for Technical Rules (DITR) at DIN, Burggrafenstraße 6, 10787 Berlin).
HEYLO does not accept any liability for damage which is caused by incorrect and irregular installation and use of the air cleaner HL 400.
Decommissioning and disposal
HEYLO devices are designed for many years of operation. Any disposal must be carried out in an environmentally friendly manner in accordance with the current relevant legal regulations. The device can be taken to any specialist dealer for disposal free of charge.
The devices must not be disposed of in the residual waste!
Technical data
| Type of unit | HL 400 |
| Air flow rate max. (m³/h) in standard / with H14 filter | 360 / 164 |
| CADR (Clean Air Delivery Rate) (m³/h) | 350 |
| CADR in terms of formaldehyde purified air (m³/h) | 85 |
| Anion concentration (mio/cm³)) | 1000 |
| Air quality display | green (good), yellow (bad), red (very bad) |
| Filter type / cleaning method | Pre-filter, UV light, ionization |
| Optional HEPA H14 filter | Combi filter consisting of pre-filter, carbon filter and H14 filter |
| Filter class (standard / with H14 filter) | EPA / HEPA |
| Room size* (at 5x and 3x air exchange rate) (m²) Room size* (at 5x and 3x air exchange rate) (m²) | 30 – 50 m² (standard filter) 14 – 23 m² (H14 filter) |
| Electrical connection (V/Hz) | 230 / 50 |
| Capacity (W) | 90 |
| Noise level min (dB(A) / 3 m) | 32 |
| Noise level max (dB(A) / 3 m) | 44 |
| Cable length (m) | 2,20 |
| IP class | 20 |
| Length/width/height (mm) | 400 / 200 / 600 |
| Weight (kg) | 9,8 |
- Roomsize calculated by 2,40m high
Attention:
The technical data can be changed in the course of further development without prior notice. Some values are approximate values.
Maintenance / Troubleshooting
Warning: Risk of electric shock
The device must be disconnected from the mains before maintenance work is carried out on it. Do not clean electrical components with a water hose or pressure washer, as water may enter the electrical part and cause an electric shock.
- When disassembling components, please turn the screws by hand to avoid damage to the retractable threads!
Search and fix errors
| Problem | Possible reason | Solution |
| The unit does not respond to switch-on |
|
|
| Air is polluted but the display shows clean (green) | Device position is unfavourable | Position the unit differently so that the air in the room can be better absorbed. |
| The air quality display is still very poor (red), even though the product has been switched on for a long time. | Air sensor is dirty | Clean the particle sensor with a cotton bud as described in “cleaning and filter change”. |
| If a strange noise (knocking, chirping) comes out of the device | Ionizer i s dusty | Clean the ionizer head with a brush as described in section “cleaning and filter change”. |
| If the product smells strange | Filter is saturated |
|
| If the product does not noticeably improve air quality even after a long period of operation |
|
|
| When the product is switched on and shortly after it is automatically put into sleep mode | Wrong operating mode | Please deactivate the sleep mode (night mode). |
Optional accessories
| Description | HEYLO item no. |
| Prefilter | 1771001 |
| Combi filter EPA E11 | 1771025 |
| Combi filter HEPA H14 | 1771023 |
| Replacement remote control | 1771004 |
Circuit diagram



































