2
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Product description
10
BA ROTEX A1 BO - 10/2007
Burner setting and limiting
output
The oil burner is set to a specific output in the factory (see tab. 7-3).
To optimise the burner output, the heating expert can:
– change the pump pressure,
– adapt the air volume,
– regulate the combustion quality,
– if big adjustment has been made to output: change oil nozzle and air nozzle.
Controlling the flow temperature
The control system installed in each case continuously determines the required flow temperature and, if required, sends a burner
demand to the automatic firing unit DKO 974 of the oil burner.
Automatic firing unit DKO 974
The automatic oil firing unit DKO 974 controlled by a microprocessor and monitors the firing programme. It features the following
properties:
– Stable programme times, independent of the fluctuations in the mains voltage or ambient temperature.
– Operating safety, even in the event of power failures. The automatic firing unit switches off in the event of a power failure
without a fault signal and on again once the normal voltage has been resumed.
An LED in the reset button of the automatic firing unit indicates the burner control processes. In
normal operating mode
the
LED sends a short flashing signal followed by an extended pause. In the event of
malfunction
, a flashing code provides
information on the cause of the fault (see chapter 6 "Faults and malfunctions").
2.4
Connections
Integrated connection group
The integrated connection group is a compact unit for connecting a heating circuit and a hot water tank to the oil condensing
boiler ROTEX A1 BO.
The integrated circulation pump allows the required water to flow through the oil condensing boiler and the active circuit (hot
water storage tank or heating circuit). The 3-way diverter valve switches between the heating circuit and the hot water storage
tank as required by the boiler control.
Temperature sensor
The oil condensing boiler has a weather-driven control for the flow temperature. This function requires an external temperature
sensor. A 3 m flexible cable is already connected inside the unit and placed in the control panel on the connecting circuit board.
The temperatures captured by the unit's internal temperature sensors (flow and return flow temperature sensor, flue gas
temperature sensor) are used for the output control of the burner and for fault detection. The temperature sensors are already
factory-connected and can be plugged directly to the respective sensor, if they need to be swapped.
If a hot water storage tank is used, the connected storage tank temperature sensor must be mounted at the suitable position in
the hot water storage tank (observe installation instructions for the hot water storage tank). The mixer circuit flow sensor
(
TMKF
,
15 60 62
) is required to control the mixer circuit
.
Information on the dimensions and connection dimensions can be taken from chapter 7 "Technical data".
The electronic control unit detects the existing sensor configuration automatically when switching on the oil
condensing boiler for the first time.
You will find more instructions and an exact description in the documentation "ROTEX Control". It is included
in the scope of supply of the particular electronic control to be ordered separately.
