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02/04/08 - 300016859-001-A P 520
5.3 Filling the system
Filling shall be performed with a low flow rate from a low point in the
boiler room in order to ensure that all the air in the boiler is bled from
the high point of the system.
All the pumps must be stopped before filling (included shunt
pump(s)).
VERY IMPORTANT : Instructions for starting up the boiler
for the first time after the system is fully or partly drained :
If all the air is not bled naturally to an expansion vessel
which opens out onto the air, the system must include
manual bleeder valves, in addition to automatic bleeder
valves with the capability to bleed the system by
themselves when it is operating; the manual bleeder valves
are used to bleed all the high points of the system and to
make sure that the filled system is free of air before the
burner is turned on.
Do not add cold water suddenly into the boiler when it is
hot.
5.4 Sludge removal
A tapped Ø 2’’ hole with a plug has been provided on the bottom of
the front of the boiler.. Fit a 1/4 turn valve (not supplied) on the
opening to remove the sludge.
Sludge removal leads to the draining of large quantities of water, so
remember to refill the system after the operation.
Comments :
never replace a boiler in an existing system without carefully rinsing
the system first. Install a sludge decanting pot on the return pipe, very
close to the boiler.
2’’ tapped sludge removal hole
M000036
1
58 mm6
150mm
13


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