TECH EU-391 ZPID, Руководство пользователя

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V. Principle of operation - operation stages
1. Fire-up
This phase starts when the fi re-up function is selected in the controller menu, and lasts
until CH temperature reaches at least 400C and the fl ue gas temperature reaches at least
1000C (default fi re-up threshold), provided that the temperature does not drop below
these values for 4 minutes (default fi re-up time). If these conditions are met, the controller
enters operation mode. If the controller fails to reach proper parameters to enter operation
mode within the pre-defi ned time, an icon indicating fi re-up failure is displayed in the left
upper corner of the screen (see: table above). In such a case, the fi re-up process must be
started again.
2. Operation
Once the fi re-up process is completed, the controller enters operation mode. It is the
primary mode of controller functioning when the throttle operation is regulated with PID
algorithm, oscillating around the pre-set temperature defi ned by the user. Instead of
Fire-up function, Throttle ON/OFF appears in the menu. The throttle may be disabled if
necessary (e.g. while adding fuel) - then the throttle closes completely.
3. Supervision
This mode is activated automatically when the temperature exceeds the pre-set value
by more than 50C in operation mode. In such a case, the controller closes the throttle
completely to reduce the temperature of circulating water.
4. Damping
If damping conditions are met, the controller enters blow-by phase and the throttle closes
completely. After blow-by phase, the controller enters damped mode. Damping process
may also be activated by disabling the throttle in the main menu.
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EU-391 z PID