Tech Controllers ST-979, Руководство пользователя

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ST-979 user’s manual
19
VI.b) Additional pump 1, Additional pump 2
This submenu includes parameters of an additional pump connected to the controller. Once the
type of additional pump is selected in the additional pump submenu (next to Pump type function),
the following parameters appear in the menu, enabling the user to configure the pump operation.
VI.b.1) CH pump
Once this option is selected, the additional pump serves as the CH pump. The pump is activated
when the sensor temperature exceeds the temperature threshold. The following parameters need
to be configured for this function to work correctly:
 Pump switch on temperature
This parameter defines the activation time of the additional pump which serves as the CH pump.
When a selected sensor reaches this temperature, the pump is activated.
 Hysteresis
This parameter defines the hysteresis of the additional CH pump threshold temperature. It is the
difference between the threshold temperature and the temperature of deactivation.
Example: the threshold temperature is 40°C and hysteresis is 5°C. When the threshold
temperature is reached, CH pump is activated. It is switched off when the temperature drops to
35°C.
 Sensor selection
It allows the user to decide which sensor should provide data for activation of the additional CH
pump.
 Room regulator
This option enables the user to select the room regulator which will automatically disable the
additional pump serving as CH pump once the regulator pre-set temperature is reached.
VI.b.2) DHW pump
When this function is active, the additional pump serves as DHW pump. The pump is activated
when the sensor 1 temperature exceeds the temperature threshold. It remains active until the
temperature measured by sensor 2 reaches the pre-set value. Additionally, it is possible to set
the alarm temperature for sensor 2. When this value is reached, the emergency procedure is
activated. The following parameters need to be configured for DHW pump to work correctly:
 Pump switch on temperature
This option is used to set the DHW pump activation temperature (the temperature measured by
sensor 1 which reads the temperature of the heat source – the CH boiler). Below this temperature
the pump remains inactive whereas above this temperature it is enabled and operates until the
pre-set temperature is reached.
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Pump type
Pump OFF
CH pump
DHW pump
Circulating pump
Floor pump
CH boiler protection