Fagor CCO-180, Service Manual

Page: 31 / 79

02/05/2020 30
SERVICE MANUAL
CONVEYOR BELT
DISHWASHERS
19.4. 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
eH (English degrees)
Chlorides: max. 150 mg/l
2.8 - 5.6
⁰
dH (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.
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
Min. 200 kPa 2 bar 2 kg/cm 2 29 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 it should
not be connected as shown in Fig. 6 but without the pressure reducer.
If the water pressure is lower than the recommended pressure, a pressure pump must be mounted ( Fig. 7) . Please
contact your supplier or the manufacturer to request the PRESSURE PUMP KIT .
If the mains pressure is within the values shown, the installation is as shown in Fig. 5.
The temperature of the water entering the appliance is also important. Depending on the version purchased, the
appliance will be prepared to operate with cold water (CW) or hot water (HW). The required temperatures are
shown in the following table.
WATER INLET TEMPERATURE Min. Max.
Cold Water (CW version) 15 ºC / 59 ºF 50 ºC / 122 ºF
Hot Water (HW version) 50 ºC / 122 ºF 60 ºC / 140 ºF
Each model is designed to operate within a temperature range for the incoming water. Therefore if the incoming
water does not fulfil the specified requirements, the wash and rinse temperatures may not be reached in the
required time or may not be correct.
The temperature of the hot water must not exceed 60
⁰
C / 140 ºF and the cold water temperature must not be less
than 15 ºC / 59 ºF.