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6.1.3
Operating mode "Emptying": Level control for emptying
Both PTC thermistor probes "Probe 1" and "Probe 2" are connected. The
following applies to both probes:
If the PTC thermistor is submerged in the liquid, the yellow LED of the cor-
responding probe goes out. If the PTC thermistor of a probe is exposed
to air or if the probe is not connected or is short-circuited, the yellow LED
of the corresponding probe lights up.
The two probe signals are logically linked to provide an output signal in
the following way:
If both probes are submerged in liquid, the green LED "Release Relay"
lights up and the relay is energised. If both probes are no longer sub-
merged in liquid, the green LED "Release Relay" goes out and the relay
is de-energised.
6.1.4
General
In case of a power outage, the relay is de-energised in all operating
modes. When power is available again, both probes must either be
exposed to air or submerged in the liquid before release is possible. A
start delay of approximately 15 seconds prevents a release before the
heat-up process is completed.
The product can be operated with or without additional external equip-
ment. The following external equipment can be used:
• Visual and audible alarms
• Remote alarm equipment
• Building control systems
• Pumps
• Valves
Commissioning
RG 210
EN
26
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