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

www.AKTOBIS.de

 

Email: [email protected] 

 
 
 
 

This unit has parts that must not be replaced or repaired ! 

 

The refrigerant cannot be renewed or replaced ! 

 

Do not carry out any independent repairs or modifications to your unit ! 

 

Maintenance and repair work requiring the assistance of other qualified persons must be 

carried out under the supervision of specialists in the use of flammable refrigerants.

 

 
 

 

 
 
 

Important safety instructions for repairing a unit with refrigerant R290: 

 

1. 

check the environment 

Before starting work on systems containing flammable refrigerants, safety checks are required 
to ensure that the risk of ignition is minimised. When repairing the refrigerant system, the 
following safety precautions must be observed and adhered to before any work is carried out on 
the system. 

Procedure 

Work must be carried out under a controlled procedure to minimise the risk of flammable gases 
or vapours being present during the execution of the work. 

 

2. general work area 

All maintenance personnel and other persons in the vicinity must be instructed on the type of 
work to be carried out. Work in confined spaces must be avoided. The area around the work 
area must be partitioned off. Make sure that the conditions in the work area have been made 
safe by controlling the flammable material. 

 

3. check for the presence of refrigerants 

The area must be checked with a suitable refrigerant detector before and during work to ensure 
that the technician is aware of possible flammable atmospheres. Ensure that the refrigerant 
detector used is suitable for working with flammable refrigerants, e.g. non-sparking, adequately 
sealed and intrinsically safe. 

 

4. presence of a fire extinguisher 

If hot work is to be carried out on the refrigerant equipment or associated parts, suitable fire 
extinguishing equipment must be readily available. Make sure that a dry powder fire 
extinguisher or a CO2 fire extinguisher is nearby. 

 
 
 
 

Summary of Contents for WDH-930EEW

Page 1: ...ransport can sometimes occur despite careful instructions on the carton Therefore we ask you to let it stand upright for at least4 hours before using it for the first time so that the refrigerant in t...

Page 2: ...and in the worst case to overheating and or fire Make sure that no moisture gets to the electrics of the unit Only use the recommended voltage for operating the unit Make sure that the power cable is...

Page 3: ...es 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 ventil...

Page 4: ...trolled procedure to minimise the risk of flammable gases or vapours being present during the execution of the work 2 general work area All maintenance personnel and other persons in the vicinity must...

Page 5: ...t and the ventilation outlets are running properly and are not blocked 8 testing of the electrical equipment Before repairing and maintaining electrical components preliminary safety checks and inspec...

Page 6: ...re considered acceptable for systems containing flammable refrigerants Electronic leak detectors must be used to detect flammable refrigerants but their sensitivity may not be sufficient or they may n...

Page 7: ...filling but before commissioning A verification leakage test must be carried out before leaving the site 16 decommissioning Before performing this procedure it is necessary for the technician to be fu...

Page 8: ...reprocessing The reprocessing plant shall be in good working order with appropriate instructions concerning the respective equipment and shall be suitable for the reprocessing of flammable refrigerant...

Page 9: ...r 20 D 63110 Rodgau Germany www AKTOBIS de Email info aktobis de Description of the unit parts Air filter Castors Condensation tank Carrying handle Air intake Control panel Blower Output Connection po...

Page 10: ...back in place and wait approx 30 minutes so that the internal coolant can settle again 1 2 Insert the mains plug properly into the socket 1 3 Check that the condensation tank is properly seated in th...

Page 11: ...itches to standby mode and the signal light stops flashing To reactivate the WLAN function switch off the unit and then press and hold the On Off button for 5 seconds until you hear a tone confirming...

Page 12: ...orsigstr 20 D 63110 Rodgau Germany www AKTOBIS de Email info aktobis de 3 6 Proper drainage of condensation water with hose connection Make sure that the hose always has a slight slope see the followi...

Page 13: ...liance This is dangerous 5 Cleaning 5 1 Cleaning the housing a Please disconnect the mains plug before cleaning the construction dryer b Only use mild cleaning agents to clean your construction dryer...

Page 14: ...ay from walls and ceilings because otherwise the humidity value determined for the room air will be falsified As with all building dryers the dehumidification performance is decisively influenced by t...

Page 15: ...mpletely or partially dismantled units Conformity The construction dryer has been tested and itself and or parts thereof have been manufactured under the following safety standards T V Rheinland GS te...

Page 16: ...____________________________ _________________________________________________________ _________________________________________________________ _______________________________________________________...

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