General information
17
AUTOMATIC LEVEL REGULATOR AND SAFETY LEVEL SWITCH
The detection and control principle of the level is based on the electrical conductivity of the water.
The following conditions must be met to ensure the proper operation of the level switch:
–
Water conductivity: >250 μS/cm
–
Generator temperature: <210°C
–
Pressure: <20 bar
(See the "Operating water" paragraph).
The appliance consists of a part located in the control panel (electronic relays) and probes of different length immersed in the
generator body.
The operation includes:
–
Automatic start and stop of the pump:
it is managed with two probes inserted in the generator, one longer (2) to start the
pump and one shorter (1) to stop it, connected to a single adjustment relay in the control panel
–
Burner stop for low level:
it is managed with two probes (3 and 4) of the same length, inserted in the generator and
connected to two separate adjustment relays in the control panel. They generate a burner stop if the water level drops below
the minimum limit allowed.
Probes in the generator:
1
Pump stop
2
Pump start
3
1st minimum level safety (burner lock and
alarm insertion)
4
2nd minimum level safety (burner lock and
alarm insertion)
5
Maximum level
N.B.: In addition to the ringing of the alarm
in the installation room, it is advisable to
add an acoustic or visual signal in a regularly
attended place.
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz
