Maintenance
Maintenance on the ball valve
30
© Lutz-Jesco GmbH 2015
BA-24721-02-V01
Chlorine gas changeover unit C 7523
Operating instructions
12.6 Maintenance on the ball valve
Precondition for action:
ü
The system has been prepared for maintenance (see 12.3).
ü
The changeover unit is free of stress.
Resources required:
@
Ball valve grip (part of the maintenance set)
@
Silicone grease
Perform the following working steps:
1.
Note the switching position of the ball valve. (left open or right open)
2.
Remove the four screws below on the motor. Remove the motor from
the wall console.
3.
Remove the four screws above on the ball valve.
4.
Remove the two screws from the side on the pressure gauge
connection.
5.
Remove the ball valve and the pressure gauge connection from the
wall console.
6.
Disconnect the ball valve and the pressure gauge connection.
7.
Dismantle the ball valve. The screw-in part (2) has a leftwards thread
and the hand lever (12+13) serves as a tool.
Fig. 19: Individual components of the ball valve
8.
Clean all components of the ball valve e.g. with warm water or
isopropyl alcohol. Allow all components to dry well.
9.
Fit the ball valve with new elastomer. Both of the seals are lightly
rubbed with silicone grease.
i
The ball in the ball valve can be fitted in a mirror inverted
fashion. Set the coupling to the control rod to check. The arrow
on the coupling points the correct position of the ball.
10.
Pull the screw-in part (2) sensitively. The control rod (6) must be
rotatable with a little resistance.
11.
Remove the O-ring from the pressure gauge connection using a
plastic tool. Clean the pressure gauge connection and insert a new
O-ring. Silicone grease is rubbed in to the O-ring.
12.
Slide the pressure gauge connection onto output of the ball valve
connection with a rotating movement.
13.
Fit the assembly in the wall console. Slide the pressure gauge cable
through the slot in the pressure gauge connection. Pull the 4 screws
above on the ball valve sensitively.
14.
Insert the coupling piece between the ball valve and motor on the
control rod of the ball valve. It will only fit in a single direction.
15.
Turn the ball valve into the same position which it had before the
maintenance.
16.
Install the servomotor.
ü
Maintenance performed on the ball valve
12.7 Functional control
Precondition for action:
ü
The changeover unit is ready for operation.
Perform the following working steps:
1.
Switch the selector switch on the motor to AUTO
2.
Switch on the voltage supply.
3.
Quit all fault messages by pressing the OK button repeatedly until
both cylinders signal green.
4.
Remove the screw cap on the pressure gauge.
5.
Simulate empty supply batteries: Carefully move the pressure gauge
pointer in an anti-clockwise direction past the red marking and allow
it to turn in the starting position.
6.
In this way, check the display in all operating situations and if
necessary, the position of connected notification equipment.
7.
Then fit the screw cap on the pressure gauge and tighten it carefully
by hand. Ensure the correct position of the seal.
ü
Functional check performed.
12.8 Finishing maintenance
Perform the following working steps:
1.
Make a note of the date and scope of the maintenance performed.
2.
Attach a sticker displaying the maintenance date to the device.
3.
Fit the connections to the device.
4.
Close the control.
5.
Pull all the cable screw connections to the control.
6.
To restart the system, proceed in accordance with the instructions in
chapter 9 "Start-up" on page 24.
ü
Maintenance completed.
