Lincoln Electric COOLARC-50 Manuel D'utilisation page 7

Cooling Efficiency
1. COOLANT RETURN
2. COOLANT IN TAKE
3. PUMP
4. FAN
5. HEAT EXCHANGER
6. HEATED AIR OUT
7. COOLANT IN
8. COOLANT OUT
9. RESERVOIR
FIGURE 3
Circulation of COOLARC-50
The high cooling efficiency COOLARC-50 offers a
cooler, more comfortable weld than conventional air-
cooled procedures as well as leading competitors water
cooled systems. Radiator improves heat convection with
minimal air flow restriction.
The COOLARC-50 cooler effectively removes the heat
of the arc away from the torch handle and places it into
the exiting air flow at the back of the cooler. Ambient air
temperature can affect the cooling parameters of the
COOLARC-50.
For example:

COOL day (50°F, 10°C): More HEAT is transferred
from the water in the heat exchanger to the air. The
water is COOLER and more HEAT is transferred
from the torch to the water.
RESULT: THE TORCH FEELS COOLER

HOT day (100°F, 38°C): Less HEAT is transferred
from the water in the heat exchanger to the air. The
water is HOTTER and less HEAT is transferred from
the torch to the water.
RESULT: THE TORCH FEELS HOTTER.
Troubleshooting
This Troubleshooting Guide is designed to be used by the machine Owner/Operator. Unauthorized repairs performed on
this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty. For
your safety, please observe all safety notes and precautions detailed in the Safety Section of this manual to avoid
electrical shock or danger while troubleshooting this equipment.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact
your local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
English
Unlike other water coolers that depend on bulky
reservoir size, the high efficiency components of
COOLARC-50 cooler allows the reservoir size to be
small. The result is a lightweight, portable unit.
Cooling Efficiency - Recommended Values
COOLARC-50 ref: K14050-1
Max welding current TIG 100% duty cycle
Max welding current MIG 100% duty cycle
Maintenance
For any maintenance or repair operations it is
recommended to contact the nearest Technical Service
Center or Lincoln Electric.
performed by unauthorized service centers or personnel
will null and void the manufacturer's warranty.
Heat Exchanger Maintenance
To maintain maximum efficiency, the heat exchanger
should be kept clean from dust and dirt buildup. Clean
the heat exchanger periodically using a vacuum hose or
low pressure air line. Avoid placing the unit near a flux
hopper or a flux waste container. A clean heat
exchanger offers better cooling performance and longer
product life. If extremely dirty conditions exist, it may be
necessary to remove the heat exchanger completely
from the cooler for a through soap and water cleaning of
the cooling fins. Use care to avoid damaging the fins.
Reservoir Maintenance
The reservoir volume should be checked daily before
using the cooler. You can do it by observation the level
of the coolant in the front panel. The unit is full when the
coolant level reaches upper part of reservoir. Keep the
reservoir full especially after changing the water lines.
The cooler should always be operated with the reservoir
fill cap on. In areas where dust can be introduced into
the reservoir through water lines or reservoir fill cap
removal, periodically flush the unit out. Dump the old
coolant and rinse the inside of the reservoir. Add new
coolant when finished. A reservoir free from particle
buildup and dirt offers better cooling efficiency and
longer pump, gun and torch life.
WARNING
4
500A
500A
WARNING
Maintenance or repairs
English