Instruction Manual

Spirit II User’s Manual Section 3: Installation

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3-17

Gas Supply Connections

Perform the following steps to connect the gas supply lines to the AGC. See Section 2

for gas supply requirements. Mating hose barbs and connectors are supplied with the

system and are sized for 3/8 inch inside diameter hose. Do not change the inlet gas

supply fittings to quick-connect fittings. Using quick-connect fittings to connect

and disconnect pressurized hoses may cause damage to the system.

Note: When making hose connections, only tighten the brass fittings enough to

make gas seals. The fittings are subject to damage if over tightened.

Air Inlet (ISO 3821 hose color - black)

• Air must be supplied to the unit at all times, regardless of the cutting current or

material type.

Oxygen Inlet (ISO 3821 hose color - blue)

• Oxygen must be supplied to the unit at all times, unless stainless steel is being cut

with H17 plasma.

Nitrogen Inlet (ISO 3821 hose color - black)

• Nitrogen must be supplied to the unit at all times, regardless of the cutting current or

material type.

H17 Inlet (ISO 3821 hose color - red)

• H17 must be supplied to the unit when stainless steel is being cut with H17 as the

plasma gas. See cutting charts in Section 5 for more information.

Argon Inlet

• Argon is optional and provides improved marking capabilities. If not used, this inlet

should be capped.