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Aktobis AG, Borsigstr. 20, D-63110 Rodgau / Germany 

www.AKTOBIS.de

 

Email: [email protected] 

 
 

 

Allow the air filter screen to dry and then put it back into its holder on the inside of the front fairing from above. 

 

Then push the retaining rods back through the outer and inner holes of the metal frame/front panel from above. 

 

Now check the cooling fins and clean them with a soft hand brush or a hoover if necessary. 

 

Finally, insert the front cover with the integrated air filter screen back into the holder of the building dryer from 
above and close/fasten it to the unit with a slight tug.  DONE !!! 

 
 

7.  Other notes 
 

Do not expose the compressor to temperatures above 45°C. Please do not do this even if the unit is not switched 
on/connected. This could damage the compressor ! 

 

The exhaust air of the building dryer is 2°C - 3°C warmer than the supply air (room temperature). This can lead to 
greatly increased room temperatures in smaller and well-insulated rooms, this is quite normal. 

 

For an effective and economical dehumidification operation, please close all doors and windows in the operating 
room of the building dryer, if possible ! 

 
 

Technical data 

 

Model name:   

 

 

 

WDH-500AH 

 

Voltage: 

 

 

 

 

220-240V ~ 50Hz 

 

Normal power consumption:

   

 

700 W (3.2 A) 

 

 

Maximum power consumption:

 

 

820 W (3.7 A)

 

 

Dehumidification capacity (optimal):   

50 ltr./day (30°C / 80% r.h.) 

 

Air circulation: 

 

 

 

 

Approx. 350 

m3/h

 

 

Compressor:   

 

 

 

Rotary compressor 

 

Dimension (H/W/D):

 

 

 

 

925 x 605 x 462 mm 

 

Weight:

 

 

 

 

 

31 kg

 

 

Waterproofness:

 

 

 

 

IPx0 

 

 

Cooling pressure (max.): 

 

 

2.5 MPa

 

 

Vapour pressure (max.):

 

 

 

1.0 MPa

 

 

Refrigerant: 

 

 

 

 

R290 (230 g)

 

 

Range of use:

   

 

 

 

5°C - 32°C

 

 

For the technical data, deviations are reserved ! 

 
 

Troubleshooting 
 

The unit is icing up. 
 
At cold temperatures or during long periods of continuous operation, the unit may freeze up despite the defrost 
sensor. In this case, we recommend that you manually defrost the unit by switching it off and then only operate it 
with a target humidity value of 60% r.l. for the time being, or warm up the room a little. The target humidity value 
can then be gradually lowered each day (e.g. 50%, then 40%, etc.).  
 
The unit does not dehumidify enough. 
 
Please remember that the primary objective is not to extract as much condensation water as possible, but to dry 
and/or keep dry the room air or ceilings, walls and inventory ! 
Furthermore, bear in mind that the building dryer can only extract moisture from the air and only indirectly from 
materials (screed/plaster). Depending on the condition of the ceilings, walls and fixtures, it can take several weeks 
before they release the stored moisture back into the air! For this reason, we also recommend that if you use your 
own humidity meter (hygrometer), you place it as freely as possible and somewhat away from walls and ceilings, 
because otherwise the determined humidity value of the room air will be falsified !!! 
 
 

Summary of Contents for WDH-500AH

Page 1: ...ct To ensure that you get a lot of enjoyment from this product here are a few more tips In case of any problems We hope that the unit meets your expectations If despite the greatest possible care ther...

Page 2: ...e base plate of the building dryer using the 10 mm spanner C Insert one axle clamp on each side through the small holes at the level of the outside of the dryer housing and then bend them up or apart...

Page 3: ...supply to the unit otherwise it can lead to a reduction in performance and in the worst case to overheating and or fire Please always keep a distance of approx 20 cm to the wall to avoid possible ove...

Page 4: ...mes heat Please note that the refrigerant is odourless and therefore a leak cannot be detected immediately by an emerging odour If refrigerant leaks it may ignite or explode especially in poorly venti...

Page 5: ...OFF SWITCH Increase button the target moisture Lowering button the target moisture 1 Air intake front panel 2 Filter behind the front panel 3 Transport handle 4 Display and control panel 5 Electricit...

Page 6: ...lights up automatically The target humidity value is already preset to 60 r l by default The unit is programmed so that the compressor switches on for dehumidification as soon as the selected target h...

Page 7: ...ensuring higher efficiency Too much dust and dirt in the filter sieve or on the cooling fins reduces the dehumidification performance and can lead to a loss of efficiency in the In the worst case this...

Page 8: ...50 ltr day 30 C 80 r h Air circulation Approx 350 m3 h Compressor Rotary compressor Dimension H W D 925 x 605 x 462 mm Weight 31 kg Waterproofness IPx0 Cooling pressure max 2 5 MPa Vapour pressure ma...

Page 9: ...authorised customer service To To make your warranty claim please enclose the original sales receipt with date of sale Excluded from the guarantee are Normal wear Improper applications such as overloa...

Page 10: ...____________________________ _________________________________________________________ _________________________________________________________ _______________________________________________________...

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