ESAB PCM-750i, Инструкция по эксплуатации

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SECTION 4 MAINTENANCE
17
4.4 FLOW SWITCH (FIGURE 4-2)
When excessive contamination is found in the air, the
flow switch (FS-4 or FS-5) should be disassembled and
cleaned as follows:
NOTE
It is not necessary to remove the flow switch from
the system for cleaning.
A. Ensure the system is shut down and there is no
trapped air under pressure in the piping.
B. Remove the piston plug.
C. Remove the spring (FS-4 only). Use care when
handling spring to prevent distortion.
D. Remove the piston.
E. Clean all parts with cleaning agent.
NOTE
Ensure cleaning agent does not contain solvents
which can degrade polysulfone.
Reassemble the flow switch in reverse order.
PISTON PLUG
PISTON
SPRING
FLOW SWITCH
Figure 4-2. Disassembly / Assembly of Flow Switch
The valve pin is a crucial member of the system. Its function is to open the gas flow check
valve that is permanently assembled within the torch head. If the pin is not correctly
placed in the electrode, the valve will not open and the system will not function.
VALVE PIN
ELECTRODE
PLACE LARGE END OF PIN INTO
OPENING IN ELECTRODE AS
SHOWN.
DO NOT REVERSE. Inserting the pin
upside down will restrict air flow.