MAINTENANCE | ||
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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%
PUMP INLET FILTER
Poor cooler performance can usually be traced to a partially or completely blocked pump inlet filter. This is
a
•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
•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.
