Elettro CF 492 Spare Parts page 10

3.1 Assembly and arrangement
Unpack the unit and assemble the handle with the
supplied spanner. Place the unit in properly ventilated if
possible not dusty room making sure that the air inlet
and outlet from cooling slots are not obstructed. Fit
torch on the unit Pict. 3 as follows:
1) Unscrew the screws M6X16 on the front panel. Slip
the flange (1) on the torch (2) and screw the torch in
the adapter (3). Insert the flange positioning the insert
with the spring in the corresponding hole on the panel
of the machine. Block the flange with the screws
M6X16 in the holes with the thread inserts.
2) For the replacement of the torch, unscrew the screw
M6X16, take away the flange (1) and unscrew the torch
(2) from the adapter (3). For the assemblage of the new
torch follow the instructions at the point 1. Pay
particular attention not to dent the power pin and not to
bend the adapter pins; a dented pin cannot be
disconnected, once fit from the fixed fitting R (pict. 1) a
bent pin prevents the adapter from being correctly
mounted on the fixed fitting R (pict.1) and the unit from
working. These machines are suitable only for
ELETTRO CF torches type P150 (and, only art. 496,
also type P50) either manual or automatic, and
ELETTRO CF do not assume any responsibility in
case that a different kind of torch is used.
N.B. Never lift the machine by the handle, but
always by the equipped eyebolt.
3.2 Setting at work
Skilled personnel must install the unit. All fittings
must be in conformity with the existing rules and in
full compliance with safety regulations. Connect the
air feed to fitting on the air pressure reduction unit I
(pict. 2) making sure that pressure is 88PSI (6bar or
KPaX100) at least with a minimal capacity of 420 CFH
(200 litres/min). Should air feed come from a pressure
reducing unit of a compressor or of a centralised plant,
the reducing unit should be adjusted at the highest out
put pressure which should not exceed 120 PSI (8bar
or KPa x100). Should air feed come from a
compressed air bottle, this should be provided with a
pressure regulator; never connect compressed air
bottles directly to the reducing unit! Pressure may
exceed the reducing unit capacity and then
explode! Check that the mains power supply matches
that indicated on the technical date plate. Connect
supply cable L (pict.2): the yellow-green wire of the
cable must be connected to an efficient earth plug of
the system, the remaining wires should be connected
to the feed line by means of a switch placed, if
possible, close to the cutting area so as to switch the
unit off quickly if necessary. The magnetothermic
switch capacity or of fuses in series with switch should
be equal or above the current I
Current I absorbed is known by reading the technical
1
specifications on the unit i.e. feed voltage U
Any extensions should have adequate sections for
current absorbed I .
1
10
absorbed by the unit.
1
available.
1
3.3 Use
Switch the unit on by turning knob A (pict.1) (light B
pict.1 lights up).
By pressing for a second the torch button, the
compressed air flow is opened. Check that, under this
condition, the pressure shown on gauge D (pict. 2) is
about 75 PSI (4,5 ÷ 4,7 bar or KPaX100), otherwise
adjust it by means of knob of reducing unit I (pict. 2),
then lock this knob by pressing it down. Connect work
clamp to the piece to be cut. Set the cutting current by
means of the knob H (pict.1).
A) 90A Version.
Aluminium: up to 6 mm 60A position;
up to 16mm 90A position.
Stainless steel and mild steel:
up to 8/10 mm 60A position;
up to 20/22 mm 90A position.
N.B. At 60 and 90 positions use nozzle D. 1,3.
B) 120A Version.
Aluminium: up to 4 mm 50A position;
up to 10/12 mm 80A position;
up to 20/22 mm 120A position.
Stainless steel and mild steel:
up to 6 mm 50A position;
up to 15 mm 80A position;
up to 30 mm 120A position.
N.B. At 50A and 80A positions use nozzle D. 1,3, at
120A position use nozzle D.1,6.
C) 150A Version.
Aluminium: up to 3/4 mm 40/50A position;
up to 8/10 mm 80/90A position;
up to 15/18mm 110/120A position;
up to 22/25 mm 150A position.
Stainless steel and mild steel:
up to 5 mm 40/50A position;
up to 12 mm 80/90 A position;
up to 25 mm 110/120A position;
up to 35 mm 150A position.
N.B. Cut quality is greatly improved if the nozzle is
kept at a distance of approx. 2 mm from the
workpiece. Often for practical reasons, however,
cutting is performed with the nozzle in contact with
the workpiece. Cutting with the nozzle in contact
with the workpiece must not be performed at
currents above 50A as this leads to rapid
(sometimes even instantaneous) destruction of the
nozzle hole; this in turn leads poor cutting quality.
Clean the work piece to ensure good electrical contact
of the work clamp. Do not connect work clamp to the
material to be removed. Press torch button to start pilot
arc, if cutting does not start after 4 seconds, the pilot
arc turns off and the button should be pressed again to
repeat the operation. When possible, the torch should
be pulled. Pulling is easier than pushing. Keep torch in
vertical position when cutting. Once cutting is over and
after releasing button, air continues to flow out of the
torch for about 1 minute so it enables torch to cool
down. It is recommended not to turn the unit off before
that time. Should holes be drilled or should the piece
be cut starting from its centre, torch should be tilted
and then slowly straighten to prevent molten metal from