Tweco GCM-6000 Gas Control - Manual (Page 26)

OPERATION 20 Manual 0-2641
9. PLASMA Gas Pressure Gauge
Indicates plasma gas pressure from 0 - 160 psi (0 - 11
bar).
10. PREFLOW Gas Regulator
Adjusts preflow gas pressure. Pull knob out and turn
clockwise to increase secondary pressure to desired
level.
11. PRELOW Gas Pressure Gauge
Indicates preflow gas pressure from 0 - 160 psi (0 -119
bar).
B. Rear Panel
The Gas Control Module GCM6000 rear panel includes
connections for the following interface cables and hoses.
A-01792
1
2
3
4
5
6
7
8
9
Figure 4-2 Rear Panel Connections
1. TO ARC STARTER BOX PLASMA
Connector for the Plasma RAS Gas Hose between the
Gas Control Module and the Arc Starter Box.
2. TO ARC STARTER BOX SECONDARY
Connector for the Secondary RAS Gas Hose between
the Gas Control Module and the Arc Starter Box.
3. TO ARC STARTER BOX PREFLOW
Connector for the Preflow RAS Gas Hose between the
Gas Control Module and the Arc Starter Box.
4. TO ARC STARTER BOX J57
Connector for the Arc Starter Control Cable between
the Gas Control Module and the Arc Starter Box.
5. Ground Stud
Connection used to attach a grounding wire to the
Gas Control Module.
6. FROM POWER SUPPLY J56
Connector for the Gas Control Cable between the Mas-
ter Power Supply and the Gas Control Module.
7. FROM POWER SUPPLY PLASMA
Connector for the Plasma Gas Hose between the Mas-
ter Power Supply and the Gas Control Module.
8. FROM POWER SUPPLY SECONDARY
Connector for the Secondary Gas Hose between the
Master Power Supply and the Gas Control Module.
9. FROM POWER SUPPLY PREFLOW
Connector for the Preflow Gas Hose between the Mas-
ter Power Supply and the Gas Control Module.
C. Optional Secondary Gas/Water Flow
Control
The Optional Secondary Gas/Water Flow Control must
be installed if the following applications are to be used
on Merlin 6000GST System:
• Use water as the secondary
• Use 'Square Cut' 50 amp parts
1. SECONDARY H
2
O Flowmeter Regulator and Gauge
Flowmeter used to adjust the flow of the secondary
water to the system.
2. SECONDARY H
2
O (Water) Connection
Connector for the Secondary Water Hose between the
Master Power Supply and the Gas Control Module.
3. GAS LOW-FLOW and HIGH-FLOW Switch
Switch used to select either LOW-FLOW or HIGH-
FLOW of the secondary gas. When using Square Cut
parts the switch must be in the LOW-FLOW position.
All other applications use HIGH-FLOW position.
4. Secondary Gas Flowmeter Regulator and Gauge
Flowmeter used to adjust the flow of the secondary
gas to the system.