In the case of an external sensor the desired CH supply temperature is
determined by the heating line programmed in the burner manager. For
the latter two, however, the maximum is the temperature set on the
display.
The CH operation the requested CH supply temperature is indicated on
the operating panel.
The CH supply temperature can be set between 30°C and 90°C. (See
section 8.1).
The actual CH supply temperature can be read by pressing the service
button during CH operation.
When the DHW comfort function is switched on (See code
7
) any
OpenTherm request for heat of less than 40°C is ignored.
The resistance R may be removed if the room thermostat does not need
anticipation current. (See section 11.2)
6
DHW operation
The hot water supply takes priority over the heating. If the flow switch
detects a need for more than 2 l/min of DHW, any demand for CH will be
interrupted. After the fan has reached speed (code
3
) and ignition has
taken place (code
4
) the manager goes to DHW mode (code
6
).
During DHW operation the fan speed, and hence the power of the
appliance, are controlled by the burner manager so that the DHW water
temperature reaches the DHW temperature setting.
The water temperature can be set between 40°C and 65°C (See section
8.1) and is displayed on the operating panel during DHW operation.
The actual DHW temperature can be read by pressing the service button
during DHW operation.
7
Pre heating exchanger
To enable fast delivery of domestic hot water the burner manager is
equipped with the DHW comfort function. This function maintains the
temperature of the heat exchanger to an adjustable temperature (See
section 8.1.). The DHW comfort function has the following settings:
• On: ( LED on) The appliance’s DHW comfort function is
switched on continuously. The appliance always delivers hot water
immediately.
• Eco: ( LED on) The appliance’s DHW comfort function is self
learning. The appliance will adapt to the pattern of use of the hot
water tap. As a result, the temperature of the heat exchanger will
not be maintained during the night or in the case of longer period
of absence.
It is possible to control the comfort mode by means of an Open Therm
room thermostat.
• Off: (Both LEDs off) The temperature of the heat exchanger is not
maintained, as a result of which the delivery of domestic hot water takes a
little time. If there is no need for fast delivery of hot water, the DHW
comfort function can be switched off.
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