Lincoln Electric COOLARC 35 K2630-1 Operator's Manual page 7

Connect the welding power source to the COOL-ARC
with the 4 screws provided. Make sure the COOL-ARC
is securely connected to the welding power source
before lifting.
Front Panel Connections and
Commands Location
A: Coolant Outlet.
B: Coolant inlet.
C: Display.
D: Push button.
Output Connections
Before connecting a water-cooled torch, disconnect all
power to the power source.
The coolant inlet and outlet connections are found on the
front of the COOL-ARC.
Starting from the left side:
st
The 1 connection is the water outlet:
connect here the blue water pipe to supply
coolant to the welding equipment.
nd
The 2 connection is the water inlet:
connect here the red water pipe to return
the hot coolant to the COOL-ARC.
Connect the twist-mate connectors from the torch to the
power source.
Do not switch on the welding power source with the
COOL-ARC applied if the torch pipes (or a bypass pipe)
are disconnected from the cooling unit.
observance of this warning may be cause internal
damages at the COOL-ARC unit.
Fill the coolant tank; the type of
coolant and the quantity are
indicated in the Technical
Specification section of this manual.
Make the connections, check the
flow and the pipes color for most
efficient operation.
Turn the Power ON to the power source.
The Cooler display will illuminate and go through
initialization. The Cooler will enter into standby if a Stick
welding mode is selected.
Press the push button on the Cooler to begin priming
procedure. The Cooler display wiil show dashed lines
moving in a circular motion.
WARNING
WARNING
The non-
NOTE: If E43 alarm codes are encoured, the torch has
not been properly primed. Run the priming procedure
again by pressing the Cooler push button.
The system Power source / Cooleer / Torch is now ready
for water-cooled welding applications.
Controls and Operational Features
This new COOL-ARC is an intelligent cooling unit
equipped with a variable speed three phase rotary pump
and an embedded microprocessor PC board which
controls the pump operation, fan operation, and the
overall functioning of the unit.
The cooler operation is enabled by the power source
and utilizes a "cool as needed" approach, so the pump
and fan speed vary based on real coolant temperature.
Furthermore, error signals and related codes are
managed by the power source.
This COOL-ARC unit manages both the coolant
temperature and pressure in order to maximize the
cooling of the torch, while using as little energy as
possible. If the coolant temperature goes above the
maximum limit 185°F (85°C) or the coolant flow is
stopped or the coolant is missing, an alarm is generated
and an error code is sent to the power source. The
power source,consequently, displays the alarm ID code
on the user interface and places the power source and
cooler in a safe condition in order to avoid any damage
being done to the cooling components or to the welding
torch. Any alarm condition must be reset by the user by
clearing the alarm code at the power source user
interface before restarting operation, otherwise; the
overall welding system is kept in a standby condition
(safety mode). If a coolant over temperature is detected,
welding is stopped and the cooler is programmed to run
at maximum speed in order to recover from the high
temperature condition as soon as possible. Welding
operation cannot be restarted before the coolant
temperature has reached a temperature value below
175°F (80°C).
The COOL-ARC is enabled only when DC TIG or AC
TIG modes are selected. The cooler does not operate
when STICK modes are selected.
Due to the "cool as needed" functionality (when the
coolant temperature increases passed the maximum set
point) the pump speed is modulated by coolant
temperature feedback. This keeps the cooler noise
levels to a minimum.
The pump starts operating when any TIG welding mode
has been selected and the welder output is enabled.
The pump is kept on until the coolant temperature goes
below 175°F (80°C) or for at least 3minutes after welding
has ceased if the cooler was running while welding.
The 7-segments display shows the coolant temperature
during normal operation, but also displays additional
Cooler status information.
A-2