Tweco 6000 CE Merlin - Manual (Page 42)

OPERATION 4-6 Manual 0-2601
J. Additional Gas Purging
If additional purging of the plasma gas line is neces-
sary, move the RUN/SET/PURGE switch to PURGE
position. In PURGE mode, the GAS indicator will be
OFF because only plasma gas flows and the secon-
dary gas flow switch is not satisfied.
K. Ready for Operation
Return the RUN/SET/PURGE switch to RUN posi-
tion.
The system is now ready for operation.
NOTE
Refer to Appendix 2 for a detailed block diagram of
the Sequence Of Operation.
4.05 Operating Unit With Gas
Control Option
NOTE
This Subsection describes the normal operation of
the system with the Gas Control Option installed.
Refer to Section 4.04 for systems without the Gas
Control Option installed.
This procedure should be followed at the beginning of
each shift:
WARNING
Disconnect primary power at the source before as-
sembling or disassembling power supply, torch
parts, or torch and leads assemblies, or adding cool-
ant.
A. Coolant Level
Check the coolant level at the coolant reservoir at the
rear of the Power Supply. If the coolant is down from
the top of the reservoir more than 2 inches (50mm)
add coolant.
B. Deionizer Bag
Check the condition of the deionizer bag in the reser-
voir basket. If the bag is a yellowish brown (straw
color) then replace the bag.
C. Torch Parts
Check the torch for proper assembly. Install proper
torch parts for the application (refer to Maximizer
300 Torch Instruction Manual, Catalog No. 0-2573).
D. Input Power
Check the power source for proper input voltage.
Make sure that Power Supply is set for the proper
voltage. Close main disconnect switch or plug unit
in to supply primary power to the system.
E. Plasma Gas Supply
NOTE
Refer to the Gas Control Option Instruction
Manual 0-2477 for more information.
Connect the desired plasma gases to the gas mani-
fold at the rear panel of the Power Supply. Make
sure plasma gas sources meet requirements (refer to
Torch Instruction Manual). Check connections and
turn plasma gas supplies on.
Select the desired plasma gas at the Gas Control Op-
tion front panel PLASMA gas switch.
F. Secondary Gas Supply
NOTE
Refer to the Gas Control Option Instruction
Manual 0-2477 for more information.
Connect the desired secondary gases to the gas con-
nections at the rear of the Power Supply. Make sure
gas sources meet requirements (refer to Torch Instruc-
tion Manual). Check connections and turn secondary
supplies on.
NOTE
For all secondary gases set the Power Supply front
panel gas selector mode switch to the gas cylinder
symbol position.
Select the desired secondary gas at the Gas Control
Option front panel SECONDARY gas switch.
NOTE
To use tap water there must be a Water Regulator
(Catalog No. 8-6118) installed between the water
source and the Gas Control Option
When using water as the secondary it may take two
or three minutes for the water to start flowing out
the front of the torch.
NOTE
Refer to the Torch Instruction Manual for proper
secondary gas selection.
G. Plasma Gas Purge
Enable the system by doing one of the following: