user instructions TWIN80C_EN
7
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?
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.