Operation Manual

User instructions 15 – 30 – 40 EN
2
User instructions
Central heating unit (suited for external cylinder).…………..15B
Central heating unit (suited for external cylinder).…………..30B
Central Heating Boiler (heating)...…….…………..…………..15C
Central Heating Boiler (heating)...…….…………..…………..30C
Central Heating Boiler (heating)...…….…………..…………..40C
Combi-unit (central heating + hot water).…..............………..30K
General
The unit combines a maximum of comfort with an extremely
easy operation.
As the user, you need do no more than set the desired
temperature on the room thermostat, no matter what time of the
year.
How the boiler works
A fan sucks the air required
for the combustion through
the air feed canal (A).
Because the combustion air
in the venturi sucks an under
pressure, the correct amount
of gas (G) is automatically
added to the combustion air.
The flammable gas/air
mixture thus obtained is fed
to the burner, via a mixing
chamber, to be ignited at the
surface of the burner by a
ceramic glow plug. The hot
combustion gases are
efficiently fed through the
heat exchanger, where they
give their heat to the water.
The flue gases are fed outside, through the flue tube (F), into a
flue tube exhaust canal.
The condensation water (H
2
O) thus obtained is discharged into
the sewer.
Burner is on
• when the room thermostat is closed (heat demand)
• and when the actual flow temperature is 5°C below the set
point (desired heating flow temperature)
• and after 3 minutes anti-reciprocital time, if applicable, after
a reciprocital stop
Burner is off
• when the room thermostat is open (end of heat demand)
• when the actual flow temperature is 3°C above the set point
(blocking)
• or when the actual flow temperature is 3°C above the
maximum permissible central heating temperature.
Tips
Depending on how much you value optimum comfort and the
lowest possible energy consumption, the following tips can help
you make optimum use of your unit:
To help limit the energy consumption, it is recommended to set
the room thermostat to a lower temperature a few hours before
going to bed.
Turn all radiator taps fully open in the rooms that you want to
heat.
Shut the radiator taps off in the rooms where you do not want
any heating.
Cleaning the unit
Regularly clean the outside of the unit with a soft, damp cloth. It
is not necessary to shut the gas tap off or switch the mains off
for this.
Never use aggressive or flammable cleaning agents.
Take note that the pipes can be at a high temperature.
Holidays
With long-term absence, for example in the holidays, it is
recommended to leave the unit continually switched on. The
reason is that the unit makes a number of checks every 24
hours.
If frost can be excluded, set the room thermostat to a lower
temperature.
If frost cannot be excluded, set the room thermostat to a
temperature of 12°C or higher.
Although the unit has an internal frost protection, this does not
protect the whole installation against freezing.
Brrrr, the central heating is not working
In the unlikely event that the central heating has let you down,
we have some tips for things that you can check and remedly
yourself before an installer.
The central heating boiler is a fairly complicated item that is
fitted with safety devices, which
prevent a dangerous situation.
There can be many reasons why
the central heating is not
working.
Electricity and gas
Is the connection of the green
block in the green socket correct
connected?
Is the main switch on the unit in the right position?
Or is the circuit to which the boiler is connected out of operation
because the fuse has blown or the earth leakage switch has
activated?