Hypertherm HT4400 Plasma Arc Cutting System Gas Panel - Manual (Page 21)

Leak Tests
After installing the system and before adjusting plasma and shield gas levels, perform the following leak tests.
Leak Test 1
1. Open all gas panel valves, MV1-MV7.
2. Set the Gas Select 1 lever on the gas panel to the proper plasma gas.
3. Set the Gas Select 2 lever on the gas panel to the proper shield gas.
Note: If the shield gas is a mixture, set Gas Select 2 to the non-plasma portion of the mixture.
4. Choose Leak Test 1 on the valve select thumb-wheel switch.
5. Turn the supply gases on.
6. Turn on the power supply by positioning the CONTROL POWER circuit breaker on the rear of the power
supply to the UP (I) position.
7. When the system is pressurized, turn off the supply gases and view the supply gas pressure gauge. If the
system is losing pressure, troubleshoot by using the gas schematic on page 3-6.
Leak Test 2
1. Open all gas panel valves, MV1-MV7.
2. Set the Gas Select 1 lever on the gas panel to the proper plasma gas.
3. Set the Gas Select 2 lever on the gas panel to the proper shield gas.
Note: If the shield gas is a mixture, set Gas Select 2 to the non-plasma portion of the mixture.
4. Choose Leak Test 2 from the valve select thumb-wheel switch.
5. Turn the supply gases on.
6. Turn on the power supply by positioning the POWER circuit breaker on the rear of the power supply to the
UP (I) position.
7. When the system is pressurized, turn off the supply gases and view the supply gas pressure gauge. If the
system is losing pressure, troubleshoot by using the gas schematic on page 3-6.
OPERATION
HT4400 with Titan Gas Panel Instruction Manual 3-5
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WARNING
CUTTING WITH OXYGEN CAN CAUSE FIRE OR EXPLOSION
Cutting with oxygen as the plasma gas can cause a potential fire hazard due to the oxygen-enriched
atmosphere that it creates. As a precaution, Hypertherm recommends that an exhaust ventilation
system be installed when cutting with oxygen.