Cloos GLC 553 MC3 User Manual

13
GLC 353/503/553 MC3
Operating instructions
Special safety devices
Temperature protection
The main transformer, main rectifier and
transistor cascade are protected from
overheating by thermal switches which cut off
the welding command. This is indicated by a
yellow control lamp and as plain text on the
display. The machine should remain switched
on so that cooling air can continue cooling.
Overload protection
The cooling fan and water cooling pump are
protected from overheating by thermal
switches. Overheating can be caused by
overcharging the motor windings. The thermal
switches cut off the welding command and the
tension from the motor winding. This is
indicated by a yellow control lamp and as plain
text on the display.
Switch the machine off and eliminate the
cause for overheating.
Service
The machine can be commissioned when the
welding machine, cable assembly, wire drive unit,
welding torch, earth cable, shielding gas cylinder with
reducing valve and welding wire have correctly been
connected and installed.
- It should be ensured that the flow and return
water hoses of the wire drive unit and the torch
are not mixed up (insufficient torch cooling). The
flow is marked blue.
- The cable assembly must be protected from
tension on the power source with the enclosed
hose clip on the upper part of the cylinder holder.
- The cable assembly must be protected from
tension of the wire drive unit at the baseplate with
the second hose clip.
The tank cap must always be screwed down to
prevent contamination of the cooling liquid!
The welding machine must always be switched off
when the torch cooling circuit is interrupted, for
example when the welding torch is removed. 'The
water connections then shut automatically to prevent
the coolant running out. The pump produces a
dynamic pressure of 3,8 bar. If this pressure exists
for a long period, the pump and the coolant heat up
to such an extent that damage and leakages may
occur.
WARNING!
The machine is provided with a water filter in front of
the suction side of the cooling water pump.
When the message "lack of water" occurs, this filter
must be checked for impurities, be removed, washed
and reinstalled.
Do not change the mounting direction! Arrow head
away from pump ! Do not install a water filter without
a flow control switch.
Water cooling device
When welding at high ambient temperature (greater
than 40°C) with high capacity (greater than 500 A)
it is recommended that the cooling water for the
torch is cooled by a separate water cooling device,
i.e. ST 157/2. This device prevents the ambient air
being warmed up by the components which are
being cooled, as is the case with an integrated
water cooling system.
Commissioning
The machine is switched on with the mains switch,
item 42.
Pum and fan are switched on after approx. 10 s for 1
minute. The cooling air is suctioned at the front side
and blown out at the rear side (gas cylinder).
Interval switch off for pump and fan!
Pump and fan are only switched on when welding.
After welding they run for approx. 5 more min. in
order to recool accordingly. This avoids that in the
case of longer downtimes dirty cooling air is sucked
into the machine. Furthermore, noises and current
consumption are reduced.
The GLC 553 MC3 fan is provided with two power
steps. Normally, the low step I is switched on. If
cooling is not sufficient, the stronger step II can be
used.

Cloos GLC 553 MC3 Specifications

General

Brand	Cloos
Model	GLC 553 MC3
Category	Welding System
Language	English