Maintenance Of Classified Parts - Siemens PGC 302 Edition II Manual

MAINTENANCE
OF CLASSIFIED PARTS
According to regulations, the following operations must
only be carried out by:
1 Experienced Siemens maintenance specialists on
the user's premises
2 User's maintenance personnel with assessment by
authorized inspector according to regulations
3 factory according to manufacturing
SIEMENS
diagram
4 Factory of respective manufacturer
Part
Purging time monitoring equipment
Classified solenoid valves
Restrictors for protective gas
Heater for oven, FDV, line
Temperature limiter
Temperature class, modify limiter type
Diaphragm valve
TCD
FID
Methanizer
Window, electronics door lock
Classified cable gland,
Cassified terminals
Purging hose for protective gas
Gaskets for pressurized inclosure
Fuses for classified solenoid valves
Isolating relay: Modex, line contactor
Isolating amplifier
Numbers in brackets refer to notes in brackets.
1EXPLO.CHP, Stand Dezember 22, 1999
WARNING:
The regulations must be observed during
maintenance and repairs! According to the
regulations for maintenance on components
relevant to the explosion protection, work is
only permissible in line with the table below.
Adjustment Replacement
Upgrading
1 2 4 1 2
1 2
3 1 2
1 2
1 2 3+4 1 2
(1) (2)
1 2
1 2
(1) 2
1 2
1 2
1 2 1 2
1 2
1 2
1 2
1 2
Explosion protection
Repair Limitations
Notes
4
(1) (2) (Clean valve)
3
3 (Advice from 3)
Permissible
temperature ≤ 160 °C
3
1 2
3 (w. expert's opinion)
4
11