Tech Controllers ST-979, Руководство пользователя

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ST-979 user’s manual
21
VI.b.5) Return protection
Once this option is selected, the additional device serves as return protection (protecting against
too low temperature of CH boiler return water). The pump is activated when the CH boiler reaches
pre-defined temperature and it is deactivated when the return temperature reaches a satisfactory
level. The following parameters need to be configured:
 Pump switch on temperature
This parameter defines the temperature of return pump activation (CH boiler temperature read
from sensor 1).
 Return temperature
This parameter defines the temperature of pump deactivation (temperature read from sensor 2).
 Sensor 1 selection
This option is used to select which temperature sensor should be used to provide data for return
pump activation.
 Sensor 2 selection
This option is used to select which temperature sensor should be used to provide data for return
pump deactivation.
VI.c) Room regulator
This function enables the user to set the operation parameters of the room regulator connected
to the pellet-fired boiler controller. It is necessary to activate the cooperation with the room
regulator after it has been connected, by selecting an appropriate type of room regulator. It is
possible to connect up to three room regulators to the controller.
VI.c.1) TECH regulator
Select this option if you connect a room regulator with RS communication. Such a regulator
enables the user to view current CH boiler parameters and change certain settings e.g. pre-set
CH boiler temperature, pre-set DHW temperature.
VI.c.2) Standard regulator 1/ Standard regulator 2
Select this option if you connect a two-state regulator. Such a regulator sends a signal to the main
controller informing if the pre-set room temperature has been reached or not.
VI.c.3) Room regulator CH pump
If this function is active, the CH pump is deactivated when the room regulator sends a signal
informing that the pre-set room temperature has been reached.
VI.c.4) Fire-up function
If this function is active, the damping process is initialized when the room regulator sends a signal
informing that the pre-set room temperature has been reached. The CH boiler remains damped
until the room temperature drops – the room regulator sends a signal to the main controller
informing about too low room temperature.
VI.d) Grate
This function enables the user to configure grate operation after it has been connected to the
device.
Select ON to activate the grate to be controlled. It is enabled during every periodical cleaning
(function configured in service menu which should be accessed only be qualified service staff). It
is necessary to define the complete operation time of the grate (opening and closing) using
Opening time function.