SAS ST-550 zPID, Руководство пользователя

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User’s manual
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Damping
This function is used to damp down the fire and clear the furnace. Damping must be carried out be-
fore the disconnected from the power supply. . Such an order must be kept to ensure that all the
fuel is burnt and the remaining ash is removed.
WARNING :
Do not switch off the CH boiler at the power strip before carrying out the damping process
Once the damping function is activated, the feeder stops feeding the fuel to the furnace and the fan
operates until the flue gas temperature drops below 50 o C (default setting).
d) CH boiler operation schedule
Using ST-66P module the user may configure CH boiler operation schedule in the main menu of the
controller. It involves selecting days of the week and time of CH boiler operation. Outside these periods
the CH boiler remains damped.
e) Grate
It is another option available for pellet-fired CH boilers. . It is used to set the frequency of grate
activation, separately for
operation mode and sustain mode .
f) Sustain
Function available when ST-66P module is used, only when zPID control is disabled. It enables the user
to pre-program CH boiler damping to be conducted every time the CH boiler temperature exceeds the
pre-
set temperature value by o 5°C. When the temperature drops by a pre -defined value, the fire-up
process is initiated again.
g) Fire-up function
If this function is active, the damping process is initiated when the pre-set room temperatures of the
controlled devices have been reached. The controlled devices may be e.g. room regulator (if
connected and activated), DHW water tank and buffer (if connected and activated). It means that the
CH boiler is damped in the following situations:
- in summer mode, when the pre-set DHW temperature has been reached;
- in the remaining operation modes (house heating, water tank priority, parallel pumps), when all
controlled (connected) devices have reached their pre-set temperatures.
After completing the damping process, the controller constantly monitors the temperature of the
controlled devices. If any of these values drops to a pre-defined level, the controller starts the fire-up
process again.
h) Ash removal (optional)
NOTE :
This function is available only for CH boiler offering automatic ash removal function. It is
necessary to activate this function in Service menu.
This function enables the user to set the time and frequency of ash removal procedure.
VIII. Protections
In order to ensure safe and failure-free operation, the regulator has been equipped with a range of
safeguards. In case of alarm, a sound signal is activated and the display shows an appropriate message.
In order for the controller to return to the operation mode, press pulser knob . In the event of ‘CH
temperature too high’ alarm, it is necessary to wait until the temperature drops below the alarm value.