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6. Maintenance
6.1 Safety instructions
Warning
Cleaning and maintenance must only be carried out
by authorised and qualified staff.
Shut down the whole system before any work at the
system components and lines!
The system must be pressureless!
Wear the stipulated personal protective equipment
(protective clothing, goggles, respirator etc.) when
handling chemicals!
Observe the chemical manufacturer's safety data
sheets (MSDS) and safety instructions of the used
chemicals!
Safety installations, which have been disabled during
maintenance, must be enabled again immediately
after maintenance.
6.2 Cleaning
If necessary, clean all product surfaces with a dry and clean cloth.
6.3 Regular maintenance
The tightness of the whole system must be checked monthly. See
section
4.2 Checking the
tightness.
6.4 Maintenance interval
Maintenance should be carried out at least every two years, or in
case of malfunction. During maintenance, the parts included in
the spare parts set are replaced (see section
set). The intervals for replacement depend on different factors,
such as flow rate, operating time, pollution and ambient
temperature.
6.5 Perform maintenance
This section describes the replacement of the parts included in
the spare parts set. For details on the spare parts set, see section
6.6 Spare
parts.
6.5.1 Dismantling
Clean removed parts thoroughly with warm water
Caution
immediately after dismantling.
1. Shut down the whole system and make sure, that no residual
gas is in the system and lines.
2. Disconnect the vacuum change-over device from the inlet and
outlet lines.
3. Dismantle the inlet connections and the outlet connection.
10
The following steps refer to fig. 4.
4. Remove thrust collar (1) using an appropriate face spanner.
5. Remove glass (2).
6. If the optional indication body with signal transmitter (B) is
mounted:
– Disconnect electrical connection at control panel.
– Remove fixing screw (6).
– Remove transmitter body (4). Make sure, that the cable is
– Unscrew and remove magnet pin (5).
Fig. 4
The following steps refer to fig.
7. Push down the indication body (8) against the spring pressure
and remove the four screws (7).
8. Remove indication body (8).
6.6.1 Spare parts
9. Remove the spring bushing (10) and the spring (51.7).
10. Remove nuts (9) and remove the foot.
– Don't pull out the bolts.
7
Fig. 5
Fig. 6
not damaged.
A
1
2
51.3
29.5
Dismantling the indication body, part 1
5
Dismantling the indication body, part 2
51.7
10
Dismantling the indication body, part 3
B
4
5
6
and 6.
8
51.3
9
51.8
8
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