Maintenance - Nordmann Engineering MinAir Operating Instructions Manual

6. Maintenance

Regular servicing helps to maintain the operation of the humidifier.
!
Only qualified personnel must carry out following work.
6.1. Regular Checks
• Inspect the steam cylinder:
Are there any deposits in the steam cylinder?
Remove the drainage strainer and flush the cylinder thoroughly with tap water (without using
chemical substances). Replace the strainer after cleaning.
Are the electrodes worn?
Replace the steam cylinder.
• Inspect the steam, condensate and water hoses (also inside the humidifier):
Is the installation still correct?
Are the clamps still fastening tight?
• Inspect the intake and drainage valves:
If worn, or covered in scale deposits, the valves must be replaced.
Check the drainage cup. If necessary clean or replace.
6.2 Rectifying faults
The humidifier produces insufficient or no steam. Following causes are possible:
• The humidity controller is not demanding any steam production
• There is no water in the steam cylinder because the water supply has been interrupted (e.g. stop cock is closed etc.)
• The filter or the nozzle in the inlet valve is blocked or damaged
• The steam cylinder is worn out and needs to be replaced
• The power relay is defective
• The humidity sensor is not connected properly.
6.3 Replacing the cylinder
The serviceable life of the steam cylinder is dependent on the hardness of the tap water used and the unit's actual ope
rating hours.
The cylinder should be replaced when the system message U1 appears on the LED display. Under certain circumstances
the cylinder can still be used before it has to be replaced.
It has to be proceeded as follows:
a) Empty the cylinder by pressing button T2 for at least two seconds. Let the cylinder cool down.
For the following work procedures the equipment must be separated from power supply!
b) Loosen the clamp on the cylinder head and then remove the steam hose and the electrode plugs from the cylinder.
Push up and remove.
c) Check the Seal (O-ring) in the cylinder admission and replace if necessary.
d) To fit the new unit reverse the above procedure.
Re-start in accordance with section 5.3
6.4 Taking the humidifier out of operation
If the humidifier is out of operation for a long period of time e.g. in summer or when the air conditioning system is not
operating, the steam cylinder must be emptied.
13