Lincoln Electric IM723-A Operator'S Manual Download Page 17

D-3

MAINTENANCE

D-3

Disinfect the cooling system:

• Prepare the disinfectant: Make a quantity of only is

needed to avoid an excess.

• Bulk preparation (for coolers serviced in quantity):

2.325 gals. (8.775 liters) of pure, fresh water per
cooler 1.625 ml of additive per cooler

• Example: for 100 coolers, add 162.5 ml to 232.5

gals. of pure fresh water Pour 2.0 gals. (7.55 liters)
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 system and circulate disinfectant through it
for 10 to 15 minutes.

• Drain disinfectant from the cooling system. Do not

reuse this solution.

• Add new, fresh coolant to the cooling system. Add

0.325 gals. (1.225 liters) of fresh disinfectant to the
system by pouring it into the reservoir, then reduce
the concentration to the nominal 30 ppm:

• Add the balance 1.675 gals. (6.325 liters) 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 0.125 gal. (0.475
liters) of pure water to prevent diluting the coolant
additive.

Additive:

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

PUMP INLET FILTER 

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

• Voiding of cooler service warranty
• Cavitation damage to the pump heads inlet areas
• Welding accessory damage from overheating due to

insufficient coolant flow rate.

A new or properly cleaned pump inlet filter should
restore the cooler’s performance.

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

PROCEDURE

Preparation:

• Always switch off the Precision TIG  machine power
• Always disconnect the Under-Cooler cart from the

Tig  machine receptacle.

• Always allow the coolant in the system to cool

enough to avoid burn injuries.

• Avoid contact with contaminated coolant. Wear

waterproof gloves and protective eyewear.

• Do not remove the pump relief valves 3/4 in. acorn

hex nut or attempt to adjust the relief valve setting.

Inspect condition of coolant:

a. 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.

b. 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.

Removing Coolant:

a. Drain coolant from the reservoir using clean

siphoning equipment.

b. Coolant level should be drained below the filter’s

pressure fitting:

• This prevents coolant from streaming out of unit

when filter nut is removed.

UNDER-COOLER CART

Summary of Contents for IM723-A

Page 1: ...rt DO NOT INSTALL OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL AND THE SAFETY PRECAUTIONS CONTAINED THROUGHOUT And most importantly think before you act and be careful For use with mac...

Page 2: ...WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING Read and understand the following safety highlights For additional safety information it is strongly recommended that you purchase a copy of...

Page 3: ...cal earth ground 3 f Maintain the electrode holder work clamp welding cable and welding machine in good safe operating condition Replace damaged insulation 3 g Never dip the electrode in water for coo...

Page 4: ...vent the welding sparks from starting a fire Remember that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas Avoid welding near hydraulic...

Page 5: ...appropri s et non inflammables 4 Des gouttes de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libres de l huile tels que les gants en cuir chemise paiss...

Page 6: ...ion below for future reference This information can be found on your machine nameplate Product _________________________________________________________________________________ Model Number __________...

Page 7: ...____________________________________ Maintenance Section D Safety Precautions D 1 Routine D 1 Periodic D 1 Pump D 1 Pump Motor D 1 Heat Exchanger D 1 Reservoir Coolant Level D 2 Coolant Treatment Reco...

Page 8: ...or de ionized water For Use Below Freezing 50 water and 50 pure ethylene glycol mixture Recommended Coolant DO NOT USE Automotive anti freeze that contains rust inhibitors or leak stoppers These coola...

Page 9: ...er of the unit A 2 INSTALLATION UNDER COOLER CART A 2 Save the instruction manual and service directory sup plied with the Under Cooler cart for parts orders and future maintenance service FILLING COO...

Page 10: ...have hose to make replacement hose assem blies but need to order the fittings and hardware see below for the correct part numbers to mate with the Under Cooler cart and the Precision TIG Machine Then...

Page 11: ...tions on compressed gas cylinders associated equipment and CGA publication P 1 Precautions for Safe Handling of Compressed Gases in Cylinders available from the Compressed Gas Associate 1235 Jefferson...

Page 12: ...with this Precision TIG Under Cooler cart is explained in the Precision TIG machine literature The torch does not directly attach to the cooler but through a connection box mounted on the TIG machine...

Page 13: ...G machine fan By using this receptacle the duty cycle of the cooler is greatly reduced and lets the cooler run only when needed RECOMMENDED EQUIPMENT The Under Cooler cart is designed for use with the...

Page 14: ...to hear the fan running and feel air flow out of the back of the unit when the cooler is operating The cooler will run continuously unless it is plugged into the switched receptacle on the power sour...

Page 15: ...ger completely from the cooler and clean the fins with soap and water Use care to avoid damaging the fins UNDER COOLER CART SAFETY PRECAUTIONS Have qualified personnel do the maintenance work In some...

Page 16: ...Parts Pages of this manual c Cooling system the entire system including cool er and accessories torch all connecting hoses etc d Disinfectant A user prepared mixture of fresh pure water and additive...

Page 17: ...mp inlet filter This is a user serviceable item and can be cleaned and reused or replaced Continued pump operation with a blocked filter can cause Voiding of cooler service warranty Cavitation damage...

Page 18: ...ris into pump e Reinstall strainer and acorn nut tighten to 75 in lbs 8 5N m of torque Hold pump head to apply counter torque when loosening strainers 7 8 acorn nut f Wipe dry all areas wetted by cool...

Page 19: ...IBLE CAUSE lists the obvious external possibilities that may contribute to the machine symptom Step 3 RECOMMENDED COURSE OF ACTION This column provides a course of action for the Possible Cause genera...

Page 20: ...ed 2 Power harness damaged 3 Water lines blocked or crimped 4 Leak in gun or water hoses 5 Coolant reservoir empty 6 The system needs to be primed 1 Hose clamp loose on one of internal hoses 2 Interna...

Page 21: ...e on one of the enclosure panels If the diagram is illegible write to the Service Department for a replacement Give the equipment code number M19812 UNDER COOLER CART ELECTRICAL SYMBOLS PER E1537 COLO...

Page 22: ...2 DIAGRAM F 2 UNDER COOLER CART M19724 3 0 1 HEAT IN WELDING TORCH OR GUN HEAT EXCHANGER FAN AIR FLOW PUMP COOLANT RESERVOIR K1828 1 Under Cooler Cart Water Cooler Flow Diagram COOLANT OUT COOLANT IN...

Page 23: ...NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual The specific diagram for a particular code is pasted inside the machine on one of the enclosure...

Page 24: ...NOTES UNDER COOLER CART...

Page 25: ...NOTES UNDER COOLER CART...

Page 26: ...NOTES UNDER COOLER CART...

Page 27: ...electrically live parts or electrode with skin or wet clothing Insulate yourself from work and ground No toque las partes o los electrodos bajo carga con la piel o ropa moja da Aislese del trabajo y...

Page 28: ...e Be und Entl ftung des Arbeitsplatzes Mantenha seu rosto da fuma a Use ventila o e exhaust o para remover fumo da zona respirat ria Turn power off before servicing Desconectar el cable de ali mentaci...

Page 29: ...and Service through Subsidiaries and Distributors Worldwide Cleveland Ohio 44117 1199 U S A TEL 216 481 8100 FAX 216 486 1751 WEB SITE www lincolnelectric com World s Leader in Welding and Cutting Pr...

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