Tweco 1000 CE Merlin - Manuel (Page 39)

Manual 0-2731 4-5 OPERATION
12. Gas will flow for 20 seconds (post-flow).
a. Gas solenoid closes.
b. Gas flow stops.
c. GAS indicator turns OFF.
13. Place the ON/OFF power switch on the front panel of
the unit to OFF
a. AC Power indicator turns OFF.
b. Fans turn OFF.
14. Place the main power disconnect to open.
a. Main AC power is removed from the system.
4.05 Preparations for Operating
Follow this set-up procedure each time the system is operated:
WARNING
Disconnect primary power at the source before
assembling or disassembling power supply, torch
parts, torch and leads assemblies or adding cool-
ant.
A. Coolant Level Inspection
Check the coolant level in the coolant reservoir at the
rear of the unit. If the coolant is down from the top
of the reservoir more than 2 inches (50mm), add cool-
ant.
B. Deionizer Bag Inspection
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 Selection
Check the torch for proper assembly. Install proper
torch parts for the application (refer to Maximizer
300 Torch Instruction Manual, Catalog No. 0-2710).
D. Input Power
Check the power source for proper input voltage.
Close main disconnect switch or plug unit in to sup-
ply primary power to the system.
E. Work Cable Connection
Check for a solid and clean work cable connection to
the workpiece. The area must be free from paint and
rust.
F. Torch Connection
Check that the torch is properly connected.
G. Plasma Gas Supply
Connect desired plasma gas. Make sure gas sources
meet requirements (refer to appropriate Torch Instruc-
tion manual). Check connections and turn plasma
gas supply on.
H. Secondary Gas Supply
Connect desired secondary gas. Make sure gas
sources meet requirements (refer to Torch Instruction
Manual). Check connections and turn secondary sup-
plies on.
Select the desired secondary gas per the following:
1. If gas secondary is desired, set secondary mode
selector switch to gas cylinder symbol position.
NOTES
Tap water should only be used for secondary gas
on machine torches.
If tap water pressure is over 100 psi (6.9 bar) there
must be a Water Regulator (Catalog No. 8-6118)
installed between the water source and the Power
Supply.
2. If tap water secondary is desired, set secondary
mode selector switch to water tap symbol posi-
tion and connect tap water to the Power Supply
rear panel at the secondary water connection. 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.
I. Plasma Gas Purge
Move the Power Supply ON/OFF switch to the ON
position.
An automatic gas purge will remove any condensa-
tion that may have accumulated in the torch and leads
while the system was shut down. The gas purge du-
ration is 20 seconds. After the purge is complete, if
the RUN/SET switch is in SET position, gases will
flow. If the switch is in RUN position there will be no
gas flow.
J. Current Output Level Selection
Select the desired current output level from 30-100
amps for the operation.