SAS ST-550 zPID, User Manual

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User’s manual
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Sensor selection
Option available only for valve 1 and valve 2.
When two mixing valves are used, this option enables the user to specify which sensors should be used
to provide temperature data for the valve (for external temperature sensor and return sensor). The
temperature values may be read from the sensors of the selected valve (Own) or valve 2 sensors
(module2).
Room regulator
This option is used to define how the room regulator settings will influence particular valve status.
Room regulator – the user should select the type of a room regulator cooperating with the valve. The
following options are available:

OFF – room regulator status does not influence valve settings;

TECH regulator – a regulator with RS communication;

Proportional regulation – option available only with TECH regulators offering RS communication
function. It is necessary to configure two options: change of pre-set valve temp. and room temper-
ature difference.
Room reg. temp. lower - When the room regulator reaches the pre-set temperature, the pre-set valve
temperature drops by the value defined in this parameter.(Option unavailable when Proportional
regulation is selected.)
Change of pre-set valve temperature – This setting determines by how many degrees the valve
temperature is to increase or decrease with a single unit change in room temperature (see: Room
temperature difference). This function is active only with TECH room regulator and it is closely related to
the Room temperature difference parameter.
Room temperature difference - This setting is used to define the single unit change in the current
room temperature (with the accuracy of 0.1°C) at which a predefined change in the set temperature of
the valve will be introduced (function available only with TECH room regulator).
Maximum floor temperature
This function is used to define the maximum temperature of the valve sensor which does not damage
the underfloor heating system. It is used when
floor valve is selected as the valve type. Once this
temperature is reached, an alarm is activated and the valve is closed completely. When maximum floor
temperature is reached, CH boiler protection function is deactivated. In such a case, protection of the
underfloor heating system is given a higher priority.
External temperature correction
Option available only for additional valves 1 and 2.
This function is used to calibrate the external temperature sensor.
Factory settings
This function enables the user to restore the factory settings for a particular valve. Restoring factory
settings does not change the selected valve type (CH or floor).
Valve removal
Function available only for additional valves 1 and 2.
This option is used to remove the valve from the controller memory. Valve removal is used e.g. at
disassembling the valve or module replacement (re-registration of a new module is necessary).