Tech Controllers EU-427i User Manual page 8

Temperature operation
1. Turning-on
-Turn-on sensor – sensor should be defined to provide the pump with current temperature which will
determine the pump turn-on threshold.
-Turn-on threshold – allows setting the turn-on threshold temperature; the pump will operate if the
actual temperature exceeds the threshold value.
-Temperature alarm – the setting allows turning the temperature alarm function on or off. Once the
option is selected the turn-on threshold temperature should be set and it needs to be indicated whether
the pump will operate after the alarm is produced.
2. Turning-off
-Room controller – should the option be selected the pump will be turned off only after the room
controller signal is received.
-Turn-off sensor - sensor should be defined to provide the pump with current temperature which will
determine the pump turn-off threshold temperature
-Turn-off threshold - allows to set the turn-off threshold temperature
-Temperature alarm - the setting allows turning the temperature alarm function on or off. Once the
option is selected the turn-on threshold temperature should be set and it needs to be indicated whether
the pump will operate after the alarm is produced.
3. Hysteresis – applies to both turn-on threshold and turn-off threshold. The option is used to delay the
controller response to temperature change when the temperature is fluctuating around the said
thresholds.
4. Sensor alarm operation - allows defining if the pump operation should be triggered by an alarm of
any of the sensors.
5. Anti-freezing - the setting allows turning the anti-freezing function on or off. Once the function is
activated the anti-freezing threshold has to be defined i.e. the temperature below which the anti-
freezing function is to be enabled.
6. Anti-stop - the setting allows turning the anti-stop function on or off. Once the function is activated
the user needs to define the interval at which the pump will turn on (range: 1 - 30 days)
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