Daikin Europe NV
6
2
Selftest
Once every 24 hours, the boiler controller tests the connected sensors. During the
test, the controller will not carry out any other tasks.
3
Ventilating
When the unit is started, the fan is first brought up to its correct start rpm. When the
start rpm is reached, the boiler controller will be ignited. Code
3
is also visible when
there is post-fanning after the boiler controller is stopped.
4
Igniting
When the fan has reached the start rpm, the boiler controller will be ignited by means
of electrical sparks. During the ignition, code
4
is displayed. If the boiler controller
does not ignite, a new attempt will be made after approximately 15 seconds. If after 4
ignition attempts, the boiler controller has still not been ignited, the controller will go
into down-time.
5
CH-operation
An on/off thermostat, an OpenTherm thermostat, an outdoor sensor or a combination
thereof can be connected to the controller (see par. 10.1)
When there is a heat request from a thermostat, after the fan has started running
(code
3
), the ignition will take place (code
4
) followed by the CH operating mode
(code
5
).
During CH operation, the rpm of the fan and therefore the power of the unit can be
adjusted so the temperature of the CH water to the required CH supply temperature
can be controlled. If an on/off thermostat has been connected, this will be the CH
supply temperature set on the display. In case of an OpenTherm or wireless
thermostat, the required CH supply temperature is determined by the thermostat. In
case of an outdoor sensor, the required CH supply temperature is determined by the
fuel line programmed in the boiler controller. For the last two situations, the
temperature set on the display is the maximum.
During CH operation, the requested CH supply temperature will be displayed on the
operating panel.
The CH supply temperature can be set between 30 and 90°C (see par. 7.1). Caution:
for a low temperature system, a lower maximum setting may be required than the
standard setting of 80°C.
You can press the service button during CH operation to read the actual CH supply
temperature.
If the tap comfort function is switched on (see code
7
), an OpenTherm heat request
of less than 40 degrees will be generated.
6
Domestic hot water operation
The hot water supply takes precedence over the heating. If the flow switch senses a
request for more than 2 l/min of domestic hot water, any CH requests will be
interrupted. After the fan has switched on (code
3
) and there has been an ignition
(code
4
), the controller will switch to domestic water operation (code
6
). During
domestic hot water operation, the rpm of the fan, and therefore the power of the unit,
is controlled by the controller on the basis of the set tap water temperature.
The control system ensures the tap water temperature is correct. The water
temperature can be set between 40°C and 65°C (see par. 7.1).
The set tap water temperature is displayed on the operation panel. The standard
setting is 60°C.
You can press the service button during tap water operation to read the actual tap
water temperature.
7
Heating up unit
In order to provide a fast supply of domestic hot water, a so-called tap comfort
function has been installed in the unit. This function keeps the heat exchanger at the
right temperature (it can be set, see par. 7.2). The tap comfort function has the
following settings:
•
On:
( LED on)
The tap comfort function of the unit is continuously switched on.
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