Tweco 3000 Merlin - Manual (Page 45)

Manual 0-2532 5-1 SERVICE
SECTION 5:
SERVICE
5.01 Introduction
This Section describes basic maintenance procedures
performable by operating personnel. No other adjust-
ments or repairs are to be attempted by other than prop-
erly trained personnel.
For major troubleshooting and parts replacement proce-
dures refer to the Power Supply Service Manual 0-2533.
5.02 General Maintenance
NOTE
Refer to Appendix IX for a recommended main-
tenance schedule for water cooled plasma
cutting systems.
A. Routine Maintenance
Routine maintenance for the Power Supply should in-
clude an occasional thorough cleaning and inspection.
The frequency depends on the usage and the operating
environment.
WARNING
Disconnect primary power at the source be-
fore assembling or disassembling power sup-
ply, torch parts, or torch and leads assemblies.
Remove both Side Panels of the Power Supply and blow
out any accumulated dirt and dust with compressed air.
The unit should also be wiped clean. If necessary, sol-
vents that are recommended for cleaning electrical ap-
paratus may be used.
While the side panels are off, inspect the wiring in the
unit. Look for any frayed wires or loose connections that
should be corrected.
B. Coolant Filter Assembly (Rear Panel)
The rear panel filter screen should be cleaned periodi-
cally. Remove the filter screen by unscrewing the filter
holder from the Coolant Filter Assembly. Clean the filter
screen by rinsing with hot soapy water. Remove soap
residue by rinsing with clean hot water. Be sure that all
the soap has been removed and the screen is dry of wa-
ter before re-installing in the Coolant Filter Assembly.
Coolant Filter Assembly
Filter Screen
Filter Holder A-01018
Figure 5-1 Coolant Filter Assembly (Rear Panel)
C. In-Line Filter Assembly
The in-line filter screen should be cleaned periodically.
To gain access to the In-Line Filter Assembly remove
the Left Side Panel (viewed from the front of unit) of the
Power Supply. Remove the filter screen by unscrewing
the filter holder from the In-Line Filter Assembly. Clean
the filter screen by rinsing with hot soapy water. Re-
move soap residue by rinsing with clean hot water. Be
sure that all the soap has been removed and the screen
is dry of water before re-installing in the In-Line Filter
Assembly.