Biasi Advance Plus 16S User Manual And Installation Instructions page 53

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Fig. 7.2
• Before slackening the main condensing
breather pipe exchanger 19 in Fig. 7.3
connect a small draining pipe to the hose
nozzle to drain water out.
19
Fig. 7.3
• 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.
• Purge the air from the pump by unscrew-
ing the pump plug 26 (Fig. 7.2); release
COMMISSIONING
the pump shaft by turning in the direction
indicated by the arrow on the information
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plate.
• Replace the pump plug.
• 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.
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