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The machine is delivered with hoses with 3/4" connections (HF455-575) and with
1x3/4" + 3x1" connections (HF730-900). These hoses t the water inlet valves of the
machine and the main water inlet taps. All the inlet valves have to be connected.
To ensure the optimal functioning of the water inlet valves, the water pressure on the
inlet should be between 3 and 5 bar (40 and 80 psi). If the pressure is too low, the cycle
time will increase considerably.
Inlet ow capacity per minute (gallons / liters): 7.93 + 13.2 / 30 + 50.
In case of boiler fed machines, a minimum of hot water of 90°C - 194°F should be
available per unit. (See Table 1)
MODEL
Min Contents Boiler
METRIC US
For the HF455, IHF455, IHF100, CHF100 350 l. 12.36 ft³
For the HF575, IHF575, IHF135, CHF135 445 l. 15.72 ft³
For the HF730, IHF730, IHF165, CHF165 566 l. 19.99 ft³
For the HF900, IHF900 566 l. 19.99 ft³
Water connection
The diameter of the main drain should be adapted to the water ow and the number
of machines. It should be sufcient to handle at least 80 l/min - 21.13 gal./min
(HF455-575) and 160 l/min - 42.26 gal./min (HF730-900) per machine.
It is necessary to connect the main drain at least on one side to an open air-brake to
allow ventilation.
When the main drain has not been sufciently deodorized, every machine should be
installed separately with a deodorizer.
The machine is equipped with a drain valve with 3" outer diameter (80 mm) for HF455-
575 and with 2x3" outer diameter (2x80 mm) for HF730-900. This drain valve should be
connected to the drain by means of the drain elbow which is delivered with the machine.
Water drain
Table 1
To comply with the WRAS water regulations: an 'approved' single check valve or
some other no less effective backow prevention device shall be tted at the point of
connection(s) between the supply and the tting (IRN R150).