Nordmende 2401935EN0801 Water intake and drainage, Electrical connections, Safety instructions

4.2 Water intake and drainage

Please observe the local regulations concerning the connection of appliances to the pressure and drainage system. The humidifier is designed to operate on ordinary tap water only. If you intend to use treated or de-mineralised water, consult your NORDMANN representative beforehand.

Where the water pressure is between 1 and 10 bar (0.1–1 MPa) the unit can be connected directly to the water supply. If it is over 10 bar (1 MPa), connection must be made via a pressure-reduction valve (set to 4 – 6 bar or 0.4–0.6 MPa).

Tap provided by customer

Drainage cup 3/4“

In any case the water feed pipes must be flushed thoroughly before connecting them to the humidifier. You should use copper piping only.

Note that the drainage facility should provide the possibility for cleaning and maintenance. The drainage pipe should have a decline of at least 5 %.

A fine filter should be fitted at the water intake to the humidifier to prevent the rapid built-up of impediments in the fine filter of the inlet valve.

3/8“ Fine filter provided by customer

5 Electrical connections

5.1 Safety instructions

All work pertaining to the electrical installation must be carried out by qualified personnel only.

Before performing any electrical work, all power to the humidifier must be disconnected. Please observe local regulations concerning electrical installations.

The installation must be fitted with a device which disconnects the unit (with a contact opening of at least 3 mm) 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 "protection class 1" for electrical equipment.

The connection details are provided in the wiring diagrams for each type of unit. Each unit is supplied with the appropriate wiring diagram.

5.2 Control voltage

The standard control voltage of 220-240 V is taken from terminals L1 and N of the heating voltage. A 1.6 A Fuse (F1) is located on the electronic control board.

5.3 Heating voltage

The cross-section of the electrical wires and the minimum fuse size should be chosen in accordance with the connection requirements (cf. technical specifications) of the type of humidifier employed. The electric supply cables must be connected to the unit’s terminals correctly. We recommend to re-tighten the screw terminals after a few days.

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