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• 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
reading should ideally be 1,3 bar and not
less than 0,3 bar.
• Close all air release valves on the C.H.
system.
• Inspect the boiler and the system for wa-
ter tightness and remedy any leaks dis-
covered.
• Cold flush the system to remove any
loose particles and any system debris be-
fore starting 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 fill-
ing are completed turn on the C.H. sys-
tem and run it until the temperature has
reached the boiler operating tempera-
ture. The system must then be immedi-
ately 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 manu-
facturer, 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
inhibitor in accordance with the manufactur-
ers instructions.
Only inhibitors that carry the Buildcert
approved label should be used.
- 52 -
COMMISSIONING
Check pump operation/pump release
The pump electronic control circuit automat-
ically releases the pump.
• Electrically power the boiler by switching
on the double pole isolation switch. The
LCD will display, the
7.3).
Fig. 7.3
• Press the 12 key for 2 seconds until both
7.4).
Fig. 7.4
The LCD display displays the boiler tem-
perature (primary circuit) and the
symbol; the
7.5).
Fig. 7.5
• Make sure that the ambient thermostat is
in the "heat demand" position.
• Check that the boiler with the gas cock
shut-off goes into ignition lockout (Er01)
symbol appear on the display (Fig.
15
12
symbol slowly flashes (Fig.
°C
symbol (Fig.
14
13
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