Maintenance
Minor maintenance:
29
© Lutz-Jesco GmbH 2015
Subject to technical changes.
150413
BA-24721-02-V01
Chlorine gas changeover unit C 7523
Operating instructions
12.4 Minor maintenance:
Precondition for action:
ü
The system has been prepared for maintenance (see chapter 12.3).
ü
New connection seals are available.
Fig. 18: Connection seals
Perform the following working steps:
1.
Loosen the union nuts and remove the three connections. - Remove
the O-rings with a blunt tool.
2.
Clean the sealing surfaces with a soft cloth.
3.
Check the display of the contact gauge At atmospheric pressure, it
must display c. zero. Otherwise, it needs to be cleaned.
4.
Look into the interior of the ball valve. Should soiling be visible, the
ball valve requires cleaning from inside.
5.
Switch the motor to MAN and move the ball valve on the hand lever. It
must revolve evenly around 180° with slight resistance. Otherwise, it
will be necessary to perform maintenance on the ball valve. Switch
the motor to AUTO.
6.
Fit the new O-rings and the connections. The union nuts are
tightened by hand.
ü
Small maintenance performed.
12.5 Cleaning the contact gauge
Note
Damage to pressure gauges
Pressure gauges are measurement devices which are adjusted by
specialists when manufactured. Pressure gauges that have been
disassembled must be tested and readjusted by the manufacturer.
ð
Do not dismantle pressure gauges.
ð
pressure gauges are highly complicated which cannot be emptied
entirely.
ð
Do not allow any soiling to enter the pressure gauge.
ð
Do not allow any water to enter the pressure gauge.
The maintenance on the pressure gauge restricts itself to a visual check
and the cleaning of the connection.
Precondition for action:
ü
The system has been prepared for maintenance (see 12.3).
ü
The changeover unit is free of stress.
Resources required:
@
PTFE strip
@
Cotton swabs
Dismantling a pressure gauge
Perform the following working steps:
1.
Remove the pressure gauge cable from the control and remove it
from the cable entry point
a
.
2.
Unscrew the pressure gauge from the pressure gauge connection.
Remove the PTFE strip from the thread.
3.
Check the input of the pressure gauge for contamination. Remove the
contamination with isopropyl alcohol. At the same time, hold the
pressure gauge with the connection facing downwards so that soiling
cannot fall into the device. Do not use a pointed tool, so that the
protective film on the plate spring is not destroyed.
4.
If the pressure gauge is not immediately reconnected, seal the
connection airtight.
5.
Fit the pressure gauge with approx. 5 long PTFE strips.
6.
Return the cable to the control and reconnect it.
ü
Contact gauge cleaned.
1