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© STULZ GmbH, Hamburg
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Supply connection
4.2 Characteristics of the drain water
Inside the humidifier the water boils and is transformed into steam, without the addition of any substances. The drain water,
as a result, contains the same substances that are dissolved in the supply water, yet in greater quantities, depending on the
concentration in the supply water and the set draining cycles, and may reach temperatures of 100 °C and an instant flow-
rate of 5 l/min; not being toxic, it may be drained into the sewage system. The drain connection has an external diameter of
40 mm. As well as resisting high temperatures, the drain must guarantee the correct downflow of water, and as a result a
downwards slope of at least 5° is recommended.
4.3 Pipe connections
The installation of the humidifier requires connection to the water supply and drain pipes.
Fig. 4.3.1
Fig. 4.3.2
Units up to 15 kg/h steam production
Units from 25 kg/h up to 65 kg/h steam production
With reference to Fig. 4.3.1, 4.3.2 which represents the lower view of the base of the machine, the supply water may be
connected using a rigid or flexi ble pipe with a minimum recommended internal diameter of 6 mm. This must be fitted with
a shut-off tap to allow the appliance to be disconnec ted during maintenance operations. To simplify the installation it is
recommended to use the fast connector 3/4"G (K87247) or the 90 ° curved connector (K87243) or a 90° copper-connector
(K87244) (available on request).
A mechanical filter should be installed to trap any solid impurities; other types of filters are not recommended.
The drain water is connected using a section of rubber or plastic tubing resistant to 100 °C, with a recommended internal
diameter of between 36 and 40 mm.
This section of pipe must be fastened using metal pipe clamps:
• above, to the outlet of the appliance;
• below, onto the rigid pipe, so as to create a minimum slope of 5°.
Supply connection
Drain connection
Drain connection
