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ManualsBrandsTECH CONTROLLERS ManualsPump ControllersTECH CONTROLLERS EU-427i Central Heating Pump Controllers
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9
Delta
When connected in that mode the pump will operate based on the temperature difference between two
selected sensors with the turn-on threshold on the source sensor and the turn-off threshold on the receiver
(or a signal from the room controller). The following conditions have to be met for the pump to be operating:
turn-on delta has been reached and the temperature difference is maintained above the turn-off delta
turn-on threshold temperature has been reached on the source sensor
temperature on the receiver sensor is maintained below the turn-off threshold or the room sensor indicates
that the preset temperature has not been reached.
1. Turn-on delta – the option allows to define the temperature difference between two sensors (source
sensor temperature less receiver sensor temperature) which, when reached, will turn the pump on.
2. Turn-off delta - the option allows defining the temperature difference between two sensors (source
sensor temperature less receiver sensor temperature) below which the pump will turn off.
3. Source
- Sensor – sensor should be defined to provide the source with current temperature.
- Turn-on threshold – the option allows setting the temperature threshold for source activation i.e. the
minimum temperature below which the pump will not turn on even if the remaining conditions are
met.
- 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.
4. Receiver
- Sensor – sensor should be defined to provide the receiver with current temperature value.
- Room controller – the option allows turning the receiver pump off after it receives the signal from
the room controller.
- Turn-off threshold – the option allows setting the receiver 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