Lincoln Electric COOL ARC IM911 - 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 bac-
terial 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
• The 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
substances.
• 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 compat-
ible 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 L (2.325 gals.) of pure, fresh water per cooler
1.625 ml of additive per cooler. Example: for 100 cool-
ers, add 162.5 ml to 232.5 gals. of pure fresh water
Pour 7.55 L (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 reser-
voir to thoroughly coat all of its surfaces. Remove the
tape from the reservoir cap. Prime the cooling system
by positioning cooler horizontally and circulate disin-
fectant through it for 10 to 15 minutes. Drain disinfec-
tant from the cooling system. Do not reuse this solu-
tion. Add new, fresh coolant to the cooling system.
Add 1.225 L (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 L (1.675 gals.) of fresh, pure
water to the reservoir to create the treated coolant
concentration. Prime the cooling system.
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 filter 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 new:
• 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
Check coolant level. Add more fresh, pure water if
required, without adding more than 0.475 L (0.125
gal.) of pure water to prevent diluting the coolant addi-
tive.