Earth Leakage Circuit Breaker (Elcb); Water Connection; Air Connection; Supply Of Detergent - Nilfisk FOOD Hybrid Compact Mode D'emploi

6.6.

Earth Leakage Circuit Breaker (ELCB).

When using an earth leakage circuit breaker (ELCB) also
known as a residual current device (RCD) or a residual
current circuit breaker (RCCB) in a system that incorpo-
rates a variable speed drive connected to 3 phase 400 V.
The trip level of the ELCB has to be 300 mA.
(30 mA used in house hold will malfunction due to earth
leakage)
Service Switch:
The unit must always be connected to the main sup-
ply through a separate service switch.
NB! Installation must always be in accordence with
local legistration.
Mains.
3/PE 400 V +/- 10%
50 Hz +/- 2Hz
L1
L2
L3
PE
L1 L2 L3
Green/Yellow
Note: Phase sequence unimportant.
Earth leakage current > 30 mA
Pulse-current or universal-current
sensitive earth leakage circuit
breaker
Connecting cable.
Observe the following when using E.l.c.b:
• Installation of E.l.c.b only between supplying mains and controller.
• The E.l.c.b can be activated by:
- capacitive leakage currents between the cable screens during operation (especially with long,
screened motor cables)
- connecting several controllers to the mains at the same time
- RFI filters
Voltage:
Frequenz: 50/60 Hz 48 -0%...62 +0%
Motor load:
Nominal current:
Fuse:
L1, L2, L3, PE

6.7. Water Connection

• Before the unit is connected to the
water supply pipe, the supply line
should be rinsed carefully in order
to remove coarse impurities and
metal shavings.
• The connection for water must be
made at the top of the unit. (see
layout drawing).
• Minimum internal diameter of the
supply pipe must be at least 1 1/4"
external (ø36mm internal).
• The unit must be fitted with a clos-
ing valve for water on the inlet (see
drawing 110003601).
16
87 Hz
110002820
V2 W1
U2 V1
W2 U1
Motor connection (delta).
Connected as above.
MD421/MD422
3/PE 400 Vac ± 10%
5.5 kW
14.2 A
20 A
2.5 mm
2
• The pressure loss in the supply line
must be held as low as possible by
- avoiding long supply pipes
- mounting low pressure resistance
ball valves and
- avoiding fittings with high pressure
loss.
• When installing the piping, take care
to avoid air traps.
• All pipe connections to the unit must
be screwed connections ensuring
simple maintenance and dismantling
of the station.
Max. allowed temperature of supply water: 70°C
Max. allowed pressure of supply water:
Water consumption at rinsing mode:
For an optimum functioning of the
injector system, we recommend install-
ing a filter on the inlet to avoid impuri-
ties.
Water inlet

6.8. Air Connection

Before the unit is connected to the air
supply, the pipe system must be care-
fully rinsed in order to remove coarse
impurities.
• The unit requires an air supply boosting
- an inlet pressure of minimum 6 bar
- a minimum capacity of 200 l/min.
6.8.1.

Supply of detergent

Main Station with User Pack System
See drawing no 110003485.
• Place the specially designed User Pack in the
automatic holder.
• If changing to a different product when ending the
cleaning process, rinse the product inlet line with
clean water as follows:
2-8 bar
30 l/min
A
110003290