Installation instructions E-SHR series page 16
9
Filling and venting the boiler
and installation
Filling of the system is carried out in the normal way. In
order to read out the central heating water pressure the
electrical supply must be switched on.
The circulation pump will not begin to operate as long as
the operating lamps are off. The control display will show
a
indication, which means that the control is
signalling insufficient water pressure. If the installation is
filled and the water pressure rises then the water pressure
will automatically be shown with an alternating
text.
If the water pressure rises to above 1.5 bar then after a short
“stop” text the
indication will appear, which means
the water pressure is sufficient and the boiler is ready for
operation.
In order to be able to read out a constant water pressure the
Step key should be pressed in and in order to obtain a
constant
readout the Step key should be pressed
briefly again.
If the water pressure in the boiler becomes to high (>2,8
bar) a
text appears, by which means the burner is
switched off. After draining the water from the installation,
by which means the water pressure arrives below 2,5 bar,
the
text disappears and the burner is activated.
In order to go from a
read-out to a technical
readout the Step key should be pressed for 5 seconds.
This read-out can be selected if the user requires a
technical read out. In order to return to the
read-
out the Step key must be pressed again for 5 seconds.
9.1 Central heating system
To fill the central heating system use the filling and drain
valve provided.
Fill the system as follows.
- Turn on the electrical supply and leave the operational
lamps off;
- Connect the mains filling loop (not supplied);
- Open the cold water supply tap on the filling loop and
allow the system to fill slowly;
- The boiler has an automatic vent which removes the air
which is present;
- Bring the installation pressure up to between 1.5 and
2.0 bar after all radiators and pipes have been vented;
- Close the mains filling loops main inlet tap, remove
filling loop and cap supplies;
- Activate the automatic venting program by pressing
the pump
key which means the pump lamp will be
illuminated. Allow the control to finish its venting
program. The pump will circulate a number of times
around the boiler as well as the central heating
installation.
Also, if a three-way valve is present, this will be
adjusted to the boiler and central heating installation
a number of times. The pump will be stopped regularly
in order to allow possible present air to escape.
- Check the water pressure and if required top up. The
working pressure in the installation should be between
1.5 and 2 bar in cold state.
- After finishing the automatic venting program the key
can be switched off again.
It can take several days before all the air is
removed from a freshly filled installation.
Especially in the first week noises can be
heard which indicate the presence of air. The
automatic air vent in the boiler will eventually
remove the air, from the system during this
period the water pressure in the system may
be deduced, if so it would be necessary to top
up the system with water to the nominal
pressure (1.5-2.0 bar) when cold.
9.2 Hot water supply
Open the main cold water supply valve to the DHW facility
and open the safety group.
Vent the plate exchanger and the hot water installation by
opening a hot water tap. Leave the tap open for as long as
required until all air has disappeared from the cylinder and
the pipes and only water is flowing from the tap.
