Operation Manual

User instructions 15 – 30 – 40 EN
3
Is there an (unusual) interruption in the gas supply? Check by
seeing whether a gas cooker in the kitchen is working. If it is not
working, call the gas company. The gas flow can also be
blocked because the gas filter of the boiler is contaminated; this
is a problem for the service man.
The unit also lets the pump regularly run outside the heating
season to prevent it from sticking. If the mains supply outside is
interrupted several times during the heating season, the pump
can stick. Solution: turn the shaft of the pump a few times by
hand (screwdriver).
Water and air
If the water pressure in the installation falls below a minimum
level, the burner will be off.
Solution: Top up with water.
It is possible to read the water pressure directly from the
display.
Reading: Press the + button in for a minimum of 5 seconds.
From the menu back to normal operation: Press the - button in
briefly (or automatically after about 5 minutes).
During filling, the unit must be connected to the mains and be
switched on.
Fully open all radiator taps.
Connect the water supply to the filling connection of the
installation.
Open the tap to fill the system with water.
When the water pressure is sufficient (> 1.3 bar), close the
filling tap again.
If there is air in the installation, the boiler can switch on, but the
radiators remain cold.
Follow the instructions from the manufacturer/installer for the
venting of possible other elements of the heating installation,
such as floor heating.
Fully open all radiator taps.
Vent the radiators after the pump is switched off.
Open the air bleed cocks of the radiators one at a time. Use an
air bleed key for this.
As soon as water comes out of the air bleed cock, shut the cock
off again.
If the central heating boiler is at the highest point of the
installation, air can collect in the boiler. This can cause a
malfunction in the boiler. Also vent the internal tap pot (only with
a Combi-unit).
Other causes
There must be heat demand from the room thermostat or other
control, otherwise the boiler will not switch on. Set the
thermostat to demand heat and check whether the boiler
switches on; this can take a minute or so.
If there is little water circulation because too many radiator taps
are closed, the boiler will not function or will function
insufficiently. In this case, open more radiator taps or ask your
installer to fit a bypass valve.
Adjustment heating curve
( in case of an outdoor temperature sensor)
Adjustment
By pressing the set/reset button in for longer than 5 seconds,
you go to the ‘mode’ menu.
To change the subsequent "Letter in menu" parameter, the user
must press the Set/Reset button.
To change the “Range” setting in the parameter, the user must
press the “+” or the “–“ button.
O/b-value: The setting of the minimal Heating flow temperature
( value in °C).
O/S-value : The setting for the sloop of the curve.
( change of Flow temperature depending on the change of the
outside temperature).
O/d-value : The setting of the flow temperature at an outside
temperature of 20°C ( value in °C).
Parameter „C“
The setting in the menu „C“ makes the maximal heating flow
temperature ( default 82°C).
Letter
in
menu
Description Range default
O/b Basic temperature 10 –70 °C 20 °C
O/S Slope 1 – 100 20
O/d Flow temperature at
outside = 20°C
0 –70 °C 20°C
C Max. Flowtemp. for
heating
25 –90 °C 82°C
O/S=20 [default]
Parameter C=82°C [default]
Outside temperature [°C]
Supply temperature [°C]
O/d=20°C [default]
O/b=20°C [default]