Water Connections; Water Quality; Electrical Connections - Nordmann MinAir Betriebsanleitung

2.5 Laying the condensate hose (see Fig. 6)
The condensate hose has to be laid as near to the vertical as possible fed directly into an open funnel or below the
siphon. When fitting the steam distribution pipe above the humidifier, the condensate can be fed directly to the unit by
placing the end of the hose in the filling cup.

3. Water connections

3.1 Water quality

NORDMANN humidifiers use ordinary tap water for the production of pure steam. The electrical conductivity should be
between 125 and 1250 microsiemens per cm. The hardness of water is measured in accordance with the international
unit millimol, calcium and magnesium ions per litre (mmol/l), previously known as degree of German hardness (DH):
Soft water:
Fairly hard water:
Hard water:
Very hard water:
Other international units:
NORDMANN's electrode steam humidifiers use water ranging from soft to very hard, without the need for prior
treatment.
3.2 Water intake and drainage (see Fig. 6)
National and local regulations must be observed.
Please observe local regulations concerning the connection of appliances to the pressure and drainage water systems.
The humidifiers are designed to operate on ordinary tap water only. If you intend using treated water, consult your
NORDMANN representative.
Where the water pressure is between 1 and 10 bar (0,1 to 1 MPa), the unit can be connected directly to the water
supply. If it is over 10 bar (1MPa) connection must be via a pressure reduction valve, set to 4–6 bar (0,4–0,6 MPa).
Water feed pipes must be thoroughly flushed before connecting them to the humidifier. Copper piping only should be used.
It is recommended to use a fine filter in the water intake line to the humidifier. This prevents the rapid build –up of
sediments in the filter of the inlet valve.
Please ensure the drainage facility allows the humidifier to perform correctly and provides clear access for cleaning and
maintenance. The drainage pipe should have a decline to the drainage system of at least 5%.

4. Electrical connections

4.1 Safety instructions
Only qualified personnel must carry out the electrical installation.
Before performing any electrical work, all power to the humidifier must be disconnected!
The installation must be fitted with a device that disconnects the unit (with contact opening of at least 3mm) on all
phases from the mains power supply.
NORDMANN humidifiers are designed to be connected to the earth lead and are categorised as belonging to Class 1
Protection for electrical equipment.
Please observe local regulations concerning the execution of electrical installations.
The connection details are provided in the wiring diagram supplied with each unit.
10
up to 1.3 mmol/l; up to 7° DH
1.3 to 2.5 mmol/l; 8 to 14° DH
2.5 to 3.8 mmol/l; 14 to 21° DH
more than 3.8 mmol/l; more than 21 ° DH
1° DH = 1.78° FH (French hardness)
1° DH = 1.25° EH (English hardness)
1° DH = 1.05° AH (American hardness)
1° DH = 10mg/l CaO
1° DH = 17.9 mg/l Ca(HCO3)2