Operation Manual

68
GT 530A DDR_G30A/AE _IO_V4.0 09/2013
Connections
Filling the system
Filling shall be performed with a low ow 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 lling
(included shunt pump(s)).
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Refer to the water quality Manual
CAUTION
Instructions for starting up the boiler for the rst
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 lled
system is free of air before the burner is turned on.
CAUTION
Do not add cold water suddenly into the boiler when
it ishot.
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 rell the system after the
operation.
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Never replace a boiler in an existing system
without carefully rinsing the system rst.
Install a sludge decanting pot on the return
pipe, very close to the boiler.
1
2” tapped sludge removal hole