Product description
8
© Lutz-Jesco GmbH 2021
BA-22404-02-V03
Chlorine changeover unit
C 7520
Operating instructions
4 Product description
4.1 Scope of delivery
The chlorine gas changeover unit C 7520 is delivered either as a ready-
to-connect unit with a mounting plate or an assembly kit for integration in
the pipe line.
Please compare the delivery note with the scope of delivery. The follow-
ing items are part of the scope of delivery:
Plate-mounted changeover unit
n
2x motor ball valves
n
Contact pressure gauge
n
Control with fitted cables (2 m)
n
1.5 m power cord with Europlug
n
Installation material for wall fixing
n
Plastic wall panel
n
Operating instructions
Assembly kit
n
2x motor ball valves
n
Chlorine gas changeover unit installation kit (pipework with contact
pressure gauge)
n
Control with fitted cables (2 m)
n
1.5 m power cord with Europlug
n
Installation material for wall fixing
n
Operating instructions
C 7520 with 5 service valves
n
Welded piping system with 2 motor ball valves and a contact pressure
gauge
n
Control with fitted cables (2 m)
n
1.5 m power cord with Europlug
n
Installation material for wall fixing
n
Operating instructions
4.2 Design and function
Chlorine gas dosing systems in a water treatment system must be per-
manently ready for operation so that the water can be disinfected at any
point. This explains the fitting of the systems with two supply batteries -
one side in operation, the other on stand-by. The electrical chlorine
changeover unit, type C 7520, ensures the automatic changeover be-
tween both batteries (cylinder or drum batteries). The chlorine can either
be liquid or gaseous.
22700003_1
PL-Bild Elektrischer Chlorgasumschalter C 7520
für Überdrucksysteme
1
2
3
Fig. 1: Structure of the device
The control (1) of the C 7520 employs the contact pressure gauge (2) in
order to detect when the power supply from the operating battery comes
to an end, in which case the control activates the motor ball valves (3).
The battery, which has been in use up to that point in time and has now
become discharged, is disconnected and the standby battery is connect-
ed.
The control signals the operating state with coloured LEDs in the flow
chart (see section 8 „Control“ on page 18). The most important operat-
ing signals are available for remote indication via relay contact if re-
quired. Manual changeover can be triggered by the push of a button. Me-
chanical changeover by hand is possible given a power outage. The
residue discharge function can be activated on the control. This function
resets at periodic intervals to the battery registered as empty following
the changeover. In this way, any remaining residue is used from the chlo-
rine cylinder, but the cylinder cannot permanently cover the chlorine re-
quirements alone.
The C 7520 is available in one version, in a welded pipe system with 5
service valves integrated. This variant allows the chlorinator to be operat-
ed even during maintenance of the changeover unit.
