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6. HYDRAULIC CONNECTIONS
The hydraulic connections for the supply and the draining of the unit must be made by specialist and
qualified personnel, who are capable of performing the work correctly and according to local standards.
Before making the connections, ensure that the machine is disconnected from the mains power.
6.1 Supply water characteristics
The supply water for the electrical heater humidifier not must be corrosive, must not emit bad odours, must not contain too
much lime to avoid excessive deposits.
The water, supplied from mains drinking water or demineralised water, must have the following characteristics:
pressure between 1 and 8 bar
temperature between 1 and 50°C
phosphate content < 5mg/l
Note that treating the water with softeners or polyphosphates does not decrease the quantity of dissolved salts, and can lead to
the formation of foam and hence irregular operation.
Not recommended:
1. the use of well water, industrial water or water from cooling circuits and, in general, water which may be chemically or
bacteriologically contaminated;
2. the addition to the water of disinfectants or anticorrosion compounds, as these may cause irritation.
Note: no relationship can be proven between water hardness and conductivity; nonetheless, as an indication only, water with a
hardness of 40°fH should have an approximate conductivity of around 900-1000 S/cm at 20
6.2 Characteristics of the drain water
Inside the humidifier water boils and steam is produced, without the addition of any kind of substance. The drain water,
therefore, contains the same substances as those dissolved in the supply water, yet in a greater proportion, depending on the
concentration in the supply water and the set drain cycles; it can also reach a temperature of 100°C. Not being toxic, it can be
drained into the backwater collection system. The drain tubing, as well as being resistant to high temperatures, must also
guarantee the correct downflow of the water; a downward slope of at least 5° is therefore recommended.
6.3 Technical specifications
The installation of the humidifier requires connection to the supply and drain water tubing.
Fig. 6.3.1
plastic tubing resistant to temperatures of 100 °C, with a recommended internal diameter of 36 mm.
This section of tubing must be fastened using metal clamps:
above, onto the appliance outlet pipe coupling;
below, onto the rigid tubing, with a minimum slope of 5°.
Carel code +030221761
chloride content < 50mg/l
low chlorine content
low CO
content
2
The connection of the supply water can be made using rigid or
flexible tubing with a minimum recommended internal diameter
of 6mm, fitted with a shut-off tap to allow the appliance to be
disconnected during maintenance operations.
To simplify installation it is recommended to use Carel flexible
tubing with an internal diameter
diameter of 8mm (code 1312350APN) and the rotating ¾"G
straight (code 9995727ACA) or elbow connector (code
9995728ACA), available upon request.
It is recommended to install a mechanical filter to trap any
solid impurities.
The drain water connection is made using a section of rubber or
11
hardness not greater than 40°fH (equal to 400 ppm as
CaCO
)
3
absence of organic compounds
0
C.
of 6mm and an external
preliminary version - rel. 2.0 - 03/09/99
heaterSteam
Tab. 6.1.1
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