Lincoln Electric IM670-A manual Coolant Treatment Recommendation, Pump Inlet Strainer, Additive

D-2 MAINTENANCE D-2

COOLANT TREATMENT

RECOMMENDATION

This procedure is intended to provide a means of reducing the objectionable amount of fungal and bacterial contamination that has occurred in COOL ARC® 40 water coolers and cooling systems.

Additive:

The recommended additive can be purchased at local pool supply stores. An example is "Maintain Pool Pro 30% Non-Foam Algaecide".

Limitations:

•This additive should be used with fresh coolants con- taining only pure water.

•This additive should not be used with coolants con- taining any other substance, including antifreeze sub- stances.

•No other additives shall be used with the specified coolant that has been treated with the recommended additive.

•This procedure is no permanent substitute for a peri- odic maintenance schedule for the specified coolers

•A 1 quart bottle of additive is sufficient to disinfect and treat about 720 coolers.

•Check with the manufacturer of your guns or torches to be sure that this procedure is compati- ble with your equipment.

Prepare the disinfectant:

Make a quantity of only what is needed to avoid an excess Bulk preparation (for coolers serviced in quan- tity):

8.775 liters(2.325 gals.) of pure, fresh water per cool- er 1.625 ml of additive per cooler. Example: for 100 coolers, add 162.5 ml to 232.5 gals. of pure fresh water Pour 7.55 liters(2.0 gals.) of disinfectant into the empty reservoir. Recap the reservoir, tape over the air vent in the cap, roll disinfectant around the inside the reservoir to thoroughly coat all of its surfaces. Remove the tape from the reservoir cap. Prime the cooling sys- tem by positioning cooler horizontally and circulate dis- infectant through it for 10 to 15 minutes. Drain disin- fectant from the cooling system. Do not reuse this solution. Add new, fresh coolant to the cooling system. Add 1.225 liters(0.325 gals.) of fresh disinfectant to the system by pouring it into the reservoir, then reduce the concentration to the nominal 30 ppm:

Add the balance 6.325 liters(1.675 gals.) of fresh, pure water to the reservoir to create the treated coolant concentration. Prime the cooling system.

Check coolant level. Add more fresh, pure water if required, without adding more than 0.475 liters(0.125 gal.) of pure water to prevent diluting the coolant addi- tive.

PUMP INLET STRAINER

Poor cooler performance can usually be traced to a partially or completely blocked pump inlet strainer. This is a user-serviceable item and can be cleaned and reused, or replaced. Continued pump operation with a blocked strainer can cause:

•Voiding of cooler service warranty

•Cavitation damage to the pump headʼs inlet areas

•Welding accessory damage from overheating due to insufficient coolant flow rate.

A new or properly cleaned pump inlet strainer should restore the coolerʼs performance.

For additional service and periodic maintenance details and for recommended coolants, follow the rec- ommendations listed below.

Procedure and Preparation:

WARNING

•Always switch off the COOL ARC® 40 machine power

•Always disconnect the COOL ARC® 40 machine from service input power.

•Always allow the coolant in the system to cool enough to avoid burn injuries.

•Avoid contact with contaminated coolant. Wear waterproof gloves and protective eye wear.

•Do not remove the pump relief valveʼs 3/4 in. acorn hex nut or attempt to adjust the relief valve setting.

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INSPECT CONDITION OF COOLANT

If coolant is contaminated or old:

•Drain the system of coolant and dispose of it in an environmentally responsible manner.

•Flush system of old coolant.

•Fill with fresh tap or distilled water, run for ten min- utes, and drain.

•Proceed to adding coolant..

If coolant is clean and fresh:

•If clean, dedicated coolant handling equipment, including a clean siphon pump and a clean holding tank are available then proceed to servicing the Pump Inlet Strainer.

COOL ARC® 40