Nilfisk-ALTO 7309021 user manual Installation requirements for water connection

1.5Installation requirements for water connection

The water tank is fitted with two water inlets, one for cold water (BLUE marking) and one for hot water (RED marking).This allows the operator to control the temperature of the water being used. If no temperature control is desired both water inlets may be attached to the cold pipeline.

At least 1 cold water inlet should always be connected and the hot inlet water should never exceed 80°C.

Each pipeline should be capable of supplying the system with at least the water volume that answers to the capacity of the system ( no. of pumps - l/min, cf. 1.3.3) and at min. 2 bar. The water pressure must not exceed 10 bar. If water is being drawn from the lines at other points, the line capacity should be equally bigger.

In order to achieve optimal temperature control the shut-off valves on both the hot and the cold pipeline should be adjusted so that the water volume of each line comes as close to the required water volume as possible.

Water should be connected at the inlet sockets with two 1" flexible hose connections (included in the MK-Mountig Kit). The two water inlet hoses are 1 m long and fitted with a 1" external taper pipe thread. Shut-off valves should be fitted right next to the connections on the supply lines, but no extra non-return valve is required as the system is fitted with an airgap type water tank.

If the water holds running sand or other impurities external filters should be fitted in addition to the internal filters.

The high-pressure connection to the pipe system should be by means of the 3/4" high-pressure hose supplied with the system. The hose is fitted with an Ø22 plain branch for connecting to cutting ring hose connection.

Liter/Min				Capacity diagram
350
300
250
200
150
100
50
0
0,3	0,4	0,5	0,6	0,7	0,8	0,9	1	1,5

EVSI 18 (Cold)

EVSI 20 (Hot)

Parallel

Max capacity ( 6-pumps)

Max capacity ( 3-pumps)

Differential pressure of solenoid valve measured in bar

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