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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.
4 Sludge removal
A tapped Ø 1Rp 2 1/2 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.
After this operation, go ahead and fill the installation.
The high-performance features of modern boilers and their use in
specific conditions as a result of the advance in burner technology
(e.g. first-stage or low modulation range operation) lead to very low
flue gas temperatures (<160°C).
For this reason :
- Use flue gas pipes designed to enable the flow of condensates
which may result from such operating modes in order to prevent
damage to the chimney.
1 Flue size
France: Refer to applicable regulations while determining the size of
the flue.
2 Connection to the flue gas pipe
The connection shall be removable, and offer minimum load losses,
i.e. it must be as short as possible with no sudden change in section.
Its diameter shall always be at least equal to that of the boiler outlet,
i.e.:
Ø 180 mm : for 4 to 6 sections
Ø 200 mm : for 7 to 9 sections
Fit a measuring point (Ø 10 mm hole) on the flue, in order to adjust
the burner (combustion check).
10/04/06 - 300007650-001-A
Do not add cold water suddenly into the boiler when it is
hot.
(voir "Refilling the installation")
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.
Chimney connection
- Install a draining tee at the bottom of the chimney.
The use of a draught moderator is recommended as well.
- As a last resort (old, outside, badly insulated chimney), the baffle
plates in the 4 upper flue ways can be partially removed, resulting
in an insrease in the flue gas temperature
Please note that GT 330 boilers have pressurised and tight furnaces
and that the pressure at the nozzle must not exceed 0 mbar, unless
special sealing precautions have been taken, for instance in order to
connect a static condenser/regenerator.
GT 330
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