63
4.4
Hydraulic connection
Before connecting the machine to the mains water supply, the water must be tested and should comply
with the following requirements:
pH:
6.5 - 7.5
Total hardness
of the water:
5 - 10
⁰
fH (French degrees)
Impurities:
Ø < 0.08 mm
3.5 - 7
⁰
fH (English degrees)
Chlorides:
max. 150 mg/l
2.8 - 5.6 ºdH (German degrees)
Cl:
0.2 - 0.5 mg/l
50 - 100 mg CaCO3/l
Conductivity:
400 - 1,000 µS/cm
If the water quality does not meet the specified requirements, contact a professional able to advise on the
water treatment systems necessary to make the water suitable and to provide a solution.
If the water hardness is higher than that indicated, a descaler should be installed to prevent the build-up of
lime on the machine and to permit optimum cleaning and drying. It is also possible to install a SOFT model
with built-in descaler (in this case if the water hardness is higher than 45 ºfH / 31.5 ºeH / 25.2 ºdH, it will
still be necessary to install an external descaler).
In addition to water quality, the pressure of the mains water supply must be considered. This is important
to ensure the machine operates correctly. The dynamic pressure of the water inlet must be within the values
indicated in the following table.
DYNAMIC PRESSURE OF WATER INLET
MOD “A”
Min.
200 kPa
2 bar
2
kg/cm
2
29 psi
Max.
400 kPa
4 bar
4.1 kg/cm
2
58 psi
MOD “B”, “C”
Min.
100 kPa
1 bar
1 kg/cm
2
14.5 psi
Max.
400 kPa
4 bar
4.1 kg/cm
2
58 psi
If the water pressure is higher than the recommended pressure, a pressure regulator must be mounted.
If the water pressure is lower than the recommended pressure, a pressure pump must be mounted (
Fig.
3)
. Please contact your supplier or the manufacturer to request the PRESSURE PUMP KIT.
The water inlet temperature is also important. Hot water should be used to optimise the machine operation,
as the use of cold water will increase the times required to reach the operating temperatures and
productivity will be reduced. If using hot water, the water temperature must not exceed 60 ºC / 140 ºF.
WATER INLET
TEMPERATURE
Min.
Max.
Cold Water
15 ºC / 59 ºF
40 ºC / 104 ºF
Hot Water
40 ºC / 104 ºF
60 ºC / 140 ºF
For the correct hydraulic installation of the machine, you must:
•
Connect the appliance to a water supply which complies with the requirements specified above
(
Fig. 2
. Direct connection /
Fig. 3
. Pressure pump connection).
All the machines have a ¾” screw-
on water hose connection. Old or used hoses must
NOT
be used.
•
Install a shut-off valve on the water supply close to the machine in an accessible position
S
(
Fig. 2
/
Fig. 3
).
•
Check that the mains pressure is within the range indicated above.
•
Check that there are no leaks
UK Only
IRN R160
: A compliant double check valve or some other no less effective device providing backflow
prevention protection to at least fluid category three shall be fitted at the point of connection(s) between the
water supply and the fitting or appliance.
Summary of Contents for AD-125
Page 14: ...14 MOD A CO 142 MOD B COP 144...
Page 15: ...15 MOD C...
