Potterton EC three 125 Installation, Operation And Maintenance Manual page 111

Sensor inputs BX1/BX2/BX3
(5930 bis 5932)
Function inputs H1/H4/H5
(5950, 5970, 5977)
7308536-02 06.13
- Status information K36: The output is set, when the burner operates.
- Flue gas damper K37: This function activates the flue gas damper control. If the
flue gas damper control is activated the burner will only start operating, when
the flue gas damper is open.
- Fan shutdown K38: This output serves to stop the fan. The output is activated,
when the fan is needed; otherwise it is not activated. The fan should be switch-
ed off as often as possible, to minimize the total energy consumption of the sys-
tem.
Functions in addition to the basic functions will be possible by configuring the
sensor inputs.
- None: Sensor inputs deactivated.
- DHW sensor B31: second DHW sensor, which is used for through loading of the
legionella function.
- Collector sensor B6: first solar collector sensor in a collector field.
- DHW circulation sensor B39: Sensor for return line of DHW circulation.
- Buffer st tank sensor B4: lower buffer storage tank sensor.
- Buffer st tank sensor B41: centre buffer sensor.
- Common flow sensor B10: common flow sensor for boiler cascades.
- Solid fuel boiler sensor B22: Sensor for the acquisition of the temperature of a
solid fuel boiler.
- DHW charging sensor B36: DHW sensor for DHW charging system.
- Buffer st tank sensor: upper buffer storage tank sensor.
- Common return sensor B73: Return sensor for the function return diversion.
- Cascade return sensor B70: common return sensor for boiler cascades.
- Swimming pool sensor B13: Sensor for measurement of swimming pool temp.
- Solar flow sensor B63: this sensor is required for the solar usage measurement.
- Solar return sensor B64: this sensor is required for the solar usage measure-
ment.
- None: No function.
- Optg mode change HCs+DHW: Changeover of the operating modes of the heat-
ing circuits to reduced operation or protecting operation (program numbers
900, 1200, 1500) and locking of domestic hot water charging in case of closed
contact at H1/H4/H5/H2.
- Optg mode changeover HC1 to HC3: Changeover of operating modes of the
heating circuits to protective operation or reduced operation.
Locking of domestic hot water charging is only possible under the setting Optg
mode change HCs+DHW.
- Heat generation lock: locking of the boiler in case of closed contact at H1/H4/
H5/H2.
- Error/alarm message: Closing the inputs H1/H2 gives a control unit-internal
fault message, which will also be signalled via a relay output, programmed as an
alarm output or in the remote management system.
- Consumer request VK1/VK2: The set flow temperature setpoint is activated via
the connecting terminals (e.g. a ventilation heater function for door curtain
units).
Note: The setpoint is set under programme number 1859/1909.
Condensing gas boiler Eurocondense three125-300 kW
Programming
111