SAS ST-550 zPID, Руководство пользователя

Страница: 9 / 36

ST-550 zPID
9
TEST RESULTS - TECH controller without PID control:
IV.4. Controller operation without zPID control
zPID control may be disabled at any time using Operation algorithm selection parameter.
Additional submenu will appear in the controller menu, allowing the user to configure boiler operation
parameters.
Once zPID control is disabled, the principle of operation is changed - after the fire-up stage the
controller enters operation mode which is followed by sustain mode:
Operation – once the controller is switched on, it enters operation mode and OPERATION appears on
the display. It is the primary mode of controller operation in which the fan operates continuously and the
fuel feeder operation is adjusted according to user’s settings. The user defines both the operation time
and pause time.
Sustain mode – this mode is activated automatically if the temperature is equal or higher than the pre-
set temperature value. Fuel feeding process slows down in order to smoothly reduce the temperature of
the circulating water.
SUSTAIN appears on the display. In order for the temperature to decrease properly,
it is necessary to configure operation and pause time in sustain mode as well as the fan speed.