User Manual
WD2145-WD1160-WD4060-WD4190
Page 79 - 85
Nota per prevenire i rischi di intasamento o danneggiamento
: se la tubazione dell’acqua è nuova o è rimasta a lungo
inattiva, prima di procedere all’allacciamento idrico assicurarsi che l’acqua sia limpida e priva d’impurità.
10.5.4
REQUISITI IMPIANTO IDRAULICO
Preliminary checks
1.
The water supply pressure must be within the required limits: min. 2 bar - max 5 bar.
2.
The water supply taps must be accessible.
WATER SUPPLY CHARACTERISTICS
Cw: MAINS WATER - essential
The appliance must be connected to “potable” mains water having hardness 42°f max. and with
total dissolved iron content, Fe2+ e Fe3+, not exceeding 0.5 ppm.
For models equipped with a steam condenser, the use of purified water, preferably with hardness
below 20°f, is recommended.
N.B.:
If the water supply contains more than 0.5 ppm of iron (Fe2+/Fe3+) and/or the hardness of the
water supply exceeds 42°f (French degrees), the water must be pretreated by installing an iron
removal and/or softening system upstream of the appliance.
WARNING - MAINS WATER HARDNESS
User’s responsibility: the hardness of the mains water must be checked prior to installation.
The authorized engineer will not be able to set the parameters of the appliance’s integral water
softener unless the hardness of the intake water is known.
Regular checks must be made
(e.g. every 6 months/year) on the intake water to ensure that the
initial values are maintained, to allow the appliance parameters to be corrected if the characteristics
change.
Dw: DEMINERALISED WATER - optional connection but strongly recommended
If available, the use of demineralised water (conductivity < 30 µS) is recommended to ensure that
washing is optimal from the chemical point of view, through better removal of the chemical
residues in the water supply; however, dirt residues will still be effectively removed even if
ordinary mains water is used.
WARNING - NO DEMI WATER
If demineralised water is not available, do not connect the relative hose to hot and/or cold water
intakes. Leave the “demineralised water" hose disconnected.
The appliance’s SETTINGS must be corrected accordingly by the Authorised Service Centre.
10.5.5
PAD ACCESSORY FOR UNPRESSURISED DEMI WATER
Connection to a non-pressurised demineralised water line (e.g. a tank operating by gravity) is only possible if a special
demineralised water pump is installed. Specific PAD model for WD1160, WD4060, WD4190: “PAD1”.
WARNING
- WHEN INSTALLING THE “PAD” ACCESSORY, MAKE SURE THAT:
The supply pressure of the PAD is less than 1 bar and greater than 0.1 bar.
- "PAD" IN COMBINATION WITH AN UNPRESSURISED TANK
With reference to the illustration below, the tank must be at a height L such that:
L > 100 cm
