S-CB
+
Boiler Range Manual
90
12
COMMISSIONING THE BOILER
12.1 First: flushing the boiler with water
After installation of the boiler the first step, before commissioning, is to flush the boiler and the whole heating instal-
lation with fresh water to remove pollution, debris and other materials that might cause a blocking. This must also
be done with heating installations, where only the boiler is replaced.
12.2 Second: filling & venting the boiler and the system
After flushing the boiler and the installation the system can be filled with fresh water. Fill the boiler and the heating
system by using the appropriate filling valve. The water pressure of the system normally lies between 1,5 and 2,0
bar
– see § 6.14 ‘Water pressure’ on page 20.
NOTICE: Use the following aspects to prevent corrosion of the central heating system:
Filling water: Do not use any additives for the water of the central heating system. The pH value of the water
should be more than 5 (If this pH value is less, please contact the supplier).
Ensure that
any used “plastic” pipes are oxygen diffusion-proof in accordance with DIN 4726/4729. If not, make
sure that the boiler circuit is separated from the heating circuit by a plate heat exchanger. This way no oxygen
that entered the heating system through these pipes can reach the boiler.
Check the total heating system for any leaks. This to prevent oxygen entering the system through these leaks.
The boiler has an automatic air vent situated on top. This vent must be opened during the filling of the boiler and
the heating system to make sure that no air/oxygen is trapped in the heat exchanger of the boiler. NOTICE: Check
that the screw cap has been loosened at least one twist. Shortly after putting the boiler into operation, check the
water pressure and add or lose some water to obtain the required pressure.
During these proceedings, make sure that no water can enter the boiler and make contact with the electrical parts.
12.3 Third: check the water flow
Before the boiler will be started it must be sure that the boiler pump is functioning and that there is a water flow
over the heat exchanger. Check the electrical power supply of the boiler; if this is connected correctly, the display
will show:
Display message
B o i
l
e r
o f f
Reason
Boiler is not active. To activate the boiler press [ON/OFF] button for six
seconds.
Display message
H E A T I
N G : b o i
l
e r
o f f
> > > : 1 2 3 .
4 ° C ( 1 2 3 .
4 ° C )
Reason
Boiler is standby. To activate the boiler press [ON/OFF] button for three
seconds.
Activate the boiler by pressing the [ON/OFF] button for six resp. three seconds. After this the following display will
appear:
Display message
H E A T I
N G : N o
d e m a n d
> > > : 1 2 3 .
4 ° C ( 1 2 3 .
4 ° C )
Reason
Boiler is active, but there is no heat demand.
When no water is present in the boiler or the water pressure is too low or high, the boiler will go into lock-out and
will show a corresponding message in the display.
Summary of Contents for S-CB+ Series
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