- 60 -
INST
ALLA
TION
COMMISSIONING
Fig. 7.2
26
•
Gradually open stopcock at the filling point
connection to the
C.H. system until water is
heard to flow; do not open fully.
•
Open each radiator air vent starting at the
lowest point of the system and close it only
when clear water, free of bubbles, flows out.
•
Continue filling the system. The actual read
-
ing should ideally be 1,3 bar and not less
than 0,3 bar.
• Close all air release valves on the
C.H.
sys-
tem.
•
Inspect the boiler and the system for water
tightness and remedy any leaks discovered.
•
Cold flush the system to remove any loose
particles and any system debris before start
-
ing the boiler for the first time.
The flushing procedure must be in line
with BS7593:2006 Treatment of Water in
D.H.W. & C.H. Systems.
When the installation and second filling
are completed turn on the C.H. system and
run it until the temperature has reached the
boiler operating temperature. The system
must then be immediately flushed through.
This procedure must be repeated twice
more.
During this operation a C.H.
flushing de
-
tergent must be used in the quantities as
specified by the appropriate manufacturer,
whose function it is to dissolve any foreign
matter which may be in the system.
INHIBITION (Primary Heating Circuit)
On the final refilling of the heating system it
is important to ensure the system water is
treated with a suitable scale and corrosion in
-
hibitor in accordance with the manufacturers
instructions.
Only inhibitors that carry the Buildcert ap-
proved label should be used.
Check pump operation/pump release
The pump electronic control circuit automati
-
cally releases the pump.
•
Electrically power the boiler by switching on
the double pole isolation switch. The LCD
will display, the
symbol (Fig. 7.3).
Fig. 7.3
•
Press the 16 key for 2 seconds until both
and
symbols appear on the dis
-
play (Fig. 7.4).
Fig. 7.4
14
15
16
17
18
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