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Procedure for replacing the steam cylinder
• Open the drainage valve using the manual drainage switch (key T1); the cylinder then empties itself completely.
Let the cylinder cool down.
• Before proceeding further, disconnect the unit from the mains.
• Loosen the clamp on the steam hose, pull off the hose and remove the electrical plug from the cylinder; the cylinder
itself can now be removed.
• To fit the new unit, reverse the above procedure. It is advisable to wet slightly either the O-ring seal on the drainer or
the outside of the cylinder’s drainage aperture, since this makes it easier to fit the new cylinder.
The humidifier is re-started in accordance with the recommendations detailed in the chapter entitled «Putting the
humidifier into operation».
5.2 Drainage strainer in the steam cylinder
All NORDMANN steam cylinders are fitted with a removable drainage strainer which can be extracted easily for
cleaning.
The drainage strainer and the cylinder can then be put back into place and the humidifier put back into operation.
5.3 Removing the electronics unit
All work pertaining to the electrical installation must be carried out by qualified personnel only. The customer is
responsible for verifying the qualifications of the technicians concerned.
Before removing the electronics unit, all power to the humidifier must be switched off.
The electronics unit comprises a processor pcb (printed circuit board) and a display pcb. All pcbs have plug-in
connections, which facilitates their replacement. After a replacement of the processor pcb make sure that the print is
coded according to the type of unit.
5.4 Taking the humidifier out of operation
Should you wish to take the humidifier out of operation for a long period of time (e.g. in summer or when the air-
conditioning system is not operated), the steam cylinder must be emptied.
Before proceeding, switch off all power to the humidifier.
Fig. 35
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