Configuration - Potterton EC three 125 Installation, Operation And Maintenance Manual

Programming
Min start temp diff Q33
(5148)
Excess interm circ temp del
(5151)
Heating circuit 1,2
(5710, 5715)
DHW sensor
(5730)
DHW control element Q3
(5731)
Basic pos DHW div valve
(5734)
108
This parameter determines switch on delay of the intermediate circuit pump de-
pending on the boiler temperature. The intermediate circuit pump is switched on
as soon as the boiler temperature has reached the boiler setpoint plus the value
set here. The setting -5 °C has the effect that the intermediate circuit pump will
be switched on as soon as the boiler temperature has reached the boiler setpoint
up to 5 °C.
Control of the burner output on the charging temperature is activated if the time
set here has elapsed since switching on the intermediate circuit pump.

8.4.17 Configuration

The heating circuits can be switched on or off by this setting. The parameters for
the heating circuits are hidden in the switched off state.
This adjustment directly affects the heating circuits and has no influence on the
operating unit!
- None: No DHW sensor available.
- Sensor B3: It exists a DHW storage tank sensor. The controller calculates the
switching points with the corresponding switching difference from the DHW
setpoint and the measured DHW storage tank temperature.
- Thermostat: Control of domestic hot water temperature as a function of the
switching status of a thermostat connected to DHW sensor B3.
Note: When using a DHW thermostat no reduced mode is possible. This means if
reduced mode is active, the DHW preparation is blocked with the thermostat.
Caution! No frost protection for DHW !
The domestic water frost protection cannot be guaranteed.
- Sensor B38: An instantaneous heater discharge sensor is present. The controller
calculates the switching points with corresponding switching difference from
the instantaneous heater setpoint and the measured DHW discharge tempera-
ture.
- None: DHW-charge de-activated via Q3.
- Charge pump: DHW-charging via the connection of a charge pump to Q3/Y3.
- Deflecting valve: DHW-charging via connection of a deflecting valve at Q3/Y3.
The base position of the diverting valve is the position in which the diverting
valve (DV) is in if no request is active.
- Last request: The diverting valve (DV) remains after the last request has ended
in this last position.
- Heating circuit: The diverting valve (DV) goes into the heating circuit position
after the last request has ended.
- DHW: The diverting valve (DV) goes into the DHW position after the last re-
quest has ended.
Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13