3-4 MAX200 Instruction Manual
7-99
SETUP
Additional Air Filtration
When site conditions introduce moisture, oil, or other contaminants into the air line, additional filtration is required.
Refer to Appendix A for filtration components and mounting sequence.
Torch Coolant Requirements
The power supply is shipped without any coolant in the tank. A standard mixture of propylene glycol (30%),
deionized water (69.9%) and 0.1% benzotriazole is recommended. This mixture resists freezing to +10° F (-12° C)
and contains a corrosion inhibitor (benzotriazole) to protect copper surfaces in the coolant loop. This mixture is
available in one-gallon containers by ordering 028872. 100% propylene glycol is available by ordering 028873.
For operating temperatures colder than the temperature stated above, the percentage of propylene glycol must be
increased. Refer to graph on the next page. Failure to do so could result in a cracked torch head, leads, or other
damage to the torch coolant system due to the coolant freezing.
Observe the warning and cautions below. Refer to the Material Safety Data Sheets in Appendix B for data
on safety, handling, and storage of propylene glycol and benzotriazole.
Gas Supply
Use inert gas hoses to connect the plasma and shield gas supplies to the gas input connectors on the rear of the
power supply.
Plasma Gas
To use liquid nitrogen, liquid oxygen, or argon/hydrogen as the plasma gas, it must be supplied to the MAX200 at
these purities: nitrogen, 99.995% and oxygen, 99.5%. The gas supply source can be compressed gas cylinders or
liquid containers. It must be capable of delivering the required gas at a delivery pressure of 120 psi to the power
supply. Refer to Section 4, Cut Charts for detailed information. If the purity level of the gas is too low or if there are
leaks in the supply hoses or connections:
• Cut speeds can decrease
• Cut quality can deteriorate
• Cutting thickness capability can decrease
• Parts life can shorten
Shield Gas
To use liquid nitrogen or carbon dioxide (compressed or liquid) as the shield gas, it must be supplied to the
MAX200 at these purities: nitrogen,99.995% and carbon dioxide, 99.5%. The gas supply source can be
compressed gas cylinders or liquid containers. It must be capable of delivering the required gas at a delivery
pressure of 90 psi to the power supply. Refer to Section 4, Cut Charts for detailed information.
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