Lincoln Electric IM438-B Pump Failure, Cooling Efficiency, Result the GUN or Torch Feels COOL- ER

B-3 OPERATION B-3

-Abrasion failure due to particulate in coolant.

-Corrosion failure due to deionized water and pure glycol mixtures.

-Cavitation failure due to air bubbles introduced by an intake screen ( or any other source).

-Dry operation failure due to the reservoir being emp- tied.

-Over pressure failure due to crimping or blocking of water hoses.

-Catastrophic sudden failure due to wear of carbon vanes in turbine pumps.

The spring actuated normally closed pressure switch is located at the top of the pump head. The springs sense a pressure buildup in the pump head and, with a buildup of pressure above the operating pressure, enable the switch which shuts off power to the fan motor and pump motor. The pressure switch allows the Cooler to run intermittently “On Demand” when connected to a water valve or solenoid only providing cooling water when it is needed. This feature saves energy, but more importantly, drastically increases pump and fan motor life. For best operation, no delay time should exist from the time flow stops and when the pump is turned off. (Refer to “Magnum System Monitor” Section).

PUMP FAILURE

Magnum Cooler pumps are designed to fail “soft” so that welding can continue until a repair is made. In the unlikely event of a “soft” pump failure, water will slowly leak from the pump head and drip out the case sides of the unit. The internal electrical components are iso- lated away from the pump and are in no danger from the leak. S20095-1 and S20095-3 Pump Replacement Kits and S20095-2 Pump Rebuild Kit are available for repair of the pump. The only tool required is a Phillips head screwdriver.

COOLING EFFICIENCY

The high cooling efficiency of Magnum Coolers offers a cooler, more comfortable gun or torch than conven- tional air cooled procedures as well as leading com- petitors water cooled systems. The heat exchanger’s corrugated fin improves heat convection transfer while minimizing air flow restriction. This design offers a durable construction capable of withstanding impact of objects through air slots. Table 3 states the recom- mended use and cooling rate for 10-I and 20-I Cooler models. Refer to Figure 9 for a description of how Magnum Coolers perform.

The Magnum Cooler effectively removes the heat of the arc away from the gun or torch handle and places it into the exiting air flow at the back of the Cooler. Outside temperature can affect the cooling perfor- mance of a Magnum Cooler.

For example:

A.COOL day (50°F, 10°C): More HEAT is trans- ferred from the water in the heat exchanger to the air. The water is COOLER and more HEAT is transferred from the gun or torch to the water.

RESULT: THE GUN OR TORCH FEELS COOL- ER

B.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 trans- ferred from the gun or torch to the water.

RESULT: THE GUN OR TORCH FEELS HOT- TER.

Unlike other water coolers that depend on bulky reser- voir size, the high efficiency components of Magnum Coolers allows the reservoir size to be small. The result is a lightweight, portable unit.

MAGNUM COOLER 10-I & 20-I