Phau Ntawv Qhia

Instruction manual switches with circular electronic unit 06 December 2021
LED indication
4 x red LED´s indicate liquid/oil detection.
4 x green LED´s flashing indicate no detection, but sensor is active.
4 x red flashing LED´s indicate no connection to mechanical unit.
Irrespective of the output function (NO/NC) LED´s are activated
when liquid is detected.
Mechanical installation
The switch is installed in a vessel or compressor, using Teflon tape or liquid sealant, for those with NPT thread.
Switches with a straight tread is delivered with a washer kept in place by an O-ring or a plastic spring. The O-ring or a plastic
spring should be removed before installation.
Switches installed in ammonia, water and alcohol has a mechanical element covered with PTFE. This is a part of the switch and
should remain on when installed.
All switches can be installed horizontally except for switches in cold conditions, where the liquid has high viscosity. For these
switches, make sure liquid can drain from the switch. This can be done by sloping the switch 0- 5 degrees downwards.
Long weld adapters should be avoided because gas pockets can build up and disturb the measurement.
Switches pointing upwards can collect liquid which disturb the measurement.
Apply Teflon tape or liquid gasket on sensors with a conical
thread. For other thread types, a washer is used.
Fasten the mechanical part with the shifting spanner
(tightening torque 80-150 Nm, depending on thread type).
Red and Green
LED’s
Disconnect the electronic unit by loosening the
treaded union or the two set screws.
In cold conditions the switches can be installed
with a downward slope.