Lincoln Electric COOL ARC IM670-A - Manual (Page 17)

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:
• 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
WARNING