Hydraulic Connection; Operation Of The Machine - grandimpianti 021 Manual Tecnico

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and PE terminals by means of a unipolar yellow-
green cable with the same section as the line
conductors.
PE U V
A
WARNING: Before making any electrical connection,
check that the main switch (tav.01-ref.10) is off "O".
After positioning the machine, connect by means of
electric cable maximum length 5 mtrs. and a suitable
cable guide, to the machine terminal box.
The characteristics of the feed cable are indicated on
the electric diagram.
For longer cable lengths consult technical service or
specialised service engineers.
The feed cable must be protected by a magneto-
thermal switch (see electric diagram).
The electrical system to which the machine is
connected must be provided with a highly sensitive
differential switch, to reach a suitable safety level and
the earthing system must be in conformity with national
regulations in the user's nation (within Europe in
conformity with IEC 364).
Make sure that the feed voltage/frequency corresponds
to the description on the machine plate.
Tolerance of feed oscillation:
± 10% for nominal voltage
± 1% for nominal frequency
Beyond the above values, the machine could get
damaged. Therefore, in cases where the local
electricity supply could exceed the above limits, the
user must arrange at his own expense, to stabilize the
line voltage to the machine.
Carefully follow the instructions on the attached
wiring diagram.
Installation of said protection is at the expense of the
user, who is responsible for correct installation.
Connection of the cable to the machine is carried out
as follows:
put the main switch (tav.01-ref.10) on "O" position;
open the panel;
connect the wires of the feed cable to the terminals
(do not use the yellow/green wire for this
connection);
the wire (yellow/green) must be connected to the
PE terminal.
The other end of the yellow/green wire of the cable
must be connected to the earthing system which must
be in conformity with national regulations in the user's
country.
The main switch (tav.01-ref.10) also acts as an
emergency stop; if necessary, turn the red handle to
the "O" position, thereby acting on the main supply to
the machine, which will be disconnected.

4.5 HYDRAULIC CONNECTION

Connect the fitting (tav.01-ref.13) as follows:
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W N
LINE
12
At about 50 cms from the machine attach a 3/8"
pipe to the water supply .
On the end of the pipe mount a tap with a 3/8" fitting.
Connect the two fittings by means of a pressure
hose (max 12 atm) with a diameter of 12 mm,
blocking the fittings with two clamps.
Connect the boiler drain tap (tav.01-ref.12) by
means of a pressure hose, if possible to a drain.
If direct connection is impossible, position a container
able to hold at least 20 litres near the machine and
ensure that it never gets empty.
CHARACTERISTICS OF FEED WATER
The efficiency of the generator, its reliability and
durability, depend for the most part on the condition of
the internal surfaces and consequently on the feed
water, which should have the following characteristics:
clear, transparent looking with no persistent
-
foaming;
total hardness mg/l CaCOз < 5;
-
PH at 25°C of 7,5÷9,5.
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4.6 AIR DISCHARGE CONNECTION
By means of the vacuum (tav.06-ref.10) the excess
steam produced during pressing is expelled.
Should this issue of steam prove to be troublesome,
this can be channelled towards the outside by means
of a suitable plastic or alluminium pipe with an internal
diameter of 80 mm.

OPERATION OF THE MACHINE

5
5.1 INITIAL SET-UP OF THE MACHINE
The machine is supplied after each component has
been tested and pre-set and is ready for correct
functioning.
Before use, the following checks must be made:
that machine is intact following transport;
that protection casings are correctly fitted;
positioning of safety plate;
connection of electrical feed;
tightening of clamps on hydraulic systems;
motor rotation direction.
5.2 START-UP (Tav.01)
Activate the main electric switch which feeds the
machine (ref.10).
Open the tap mounted at the water inlet to the machine
and check that the drain tap is tightly closed (ref.12).
Activate the boiler switch/warning lamp (ref.5).
The pump starts immediately and the warning lamp
(ref.3) comes on to indicate that water is entering the
boiler. The pump stops when the level probe which
establishes the correct amount of water in the boiler, is
activated and at the same time the warning lamp
(ref.3) goes off.
The boiler element warning lamp (ref.5) will come on a
few seconds before the water inlet lamp goes off (ref.3)
The boiler will reach pressure as indicated on the
pressure gauge (ref.14) and the elements will stay
activated until the steam pressure has reached 3 bar,
or until the pressure switch which ends the heating
operation, is activated.