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7
ENGLISH
6. Carry on with the sequence until only water leaks out of the manual
air vent valve, and the air fl ow has stopped. Close the manual air vent
valve.
7. Check the system pressure level is correct (the ideal level is 1 bar).
8. Turn off the system fi lling tap.
9. Turn on the gas tap and ignite the boiler.
3.11 Flue gas discharge and air suction
Observe local legislation regarding fl ue gas discharge.
Flue gases are discharged from a centrifugal fan located inside the combus-
tion chamber and the
control board
constantly checks that this is working
correctly. The boiler is supplied without the fl ue gas discharge/air suction kit,
since it is possible to use the accessories for appliance with a forced draught
sealed chamber that better adapts to the installation characteristics.
For
fl ue gas extraction and the restoration of boiler combustion air, it is essen-
tial to only use certi fi ed piping. Connection must be carried out correctly as in-
dicated in the instructions supplied as standard with the fl ue gas accessories.
Multiple appliances can be connected to a single smoke pipe provided that
each is a sealed chamber-type appliance. The boiler is a Type C appliance
(sealed chamber), and must therefore have a safe connection to the
fl ue
gas discharge pipe and to the combustion air suction pipe; these both carry
their contents outside, and are essential for the operation of the appliance.
POSSIBLE OUTLET CONFIGURATIONS (FIG. 24)
B23P/B53P
Suction indoors and discharge outdoors
C13-C13x Discharge via concentric wall outlet. The pipes may leave the
boiler independently, but the outlets must be concentric or suf fi ciently close
together to be subjected to similar wind conditions (within 50 cm)
C23 Discharge via concentric outlet in common smoke pipe (suction and
discharge in the same pipe)
C33-C33x Discharge via concentric roof outlet. Outlets as for C13
C43-C43x Discharge and suction in common separate smoke pipes, but
subjected to similar wind conditions
C53-C53x Separate discharge and suction lines on wall or roof and in areas
with different pressures. The discharge and suction lines must never be
positioned on opposite walls
C63-C63x Discharge and suction lines using pipes marketed and certi fi ed
separately (1856/1)
C83-C83x Discharge via single or common smoke pipe and wall suction line
C93-C93x Discharge on roof (similar to C33) and air suction from a single
existing smoke pipe
“FORCED OPEN” INSTALLATION (TYPE B23P/B53P)
Flue gas discharge pipe ø 80 mm (
fi g. 20)
The fl ue gas discharge pipe can be directed to the most suitable direction
according to installation requirements. For installation, follow the instruc-
tions supplied with the kit. In this con
fi guration, the boiler is connected to
the fl ue gas discharge pipe (ø 80 mm) through an adaptor (ø 60-80 mm).
The B23P/B53P con fi guration is forbitten in case of installation in
pressurised collective chimney (3CEp).
In this case, the combustion air is picked up from the boiler instal-
lation room (which must be a suitable technical room with proper
ventilation).
Uninsulated fl ue discharge outlet pipes are potential sources of danger.
Arrange the fl ue gas discharge pipe so it slopes by 1% towards the boiler.
The boiler automatically adapts the purging to the type of installation
and the length of the pipe.
maximum length* of the fl ue gas
discharge pipe ø 80 mm
pressure drop
45° bend 90° bend
70 m 1 m 1,5 m
*“Straight length” means without bends, drainage terminals or joints.
“SEALED” INSTALLATION (TYPE C)
The boiler must be connected to concentric or twin fl ue gas discharge pipes
and air suction pipes, both leading outdoors. The boiler must not be oper-
ated without them.
Concentric pipes (ø 60-100 mm) ( fi g.21)
The concentric pipes can be placed in the most suitable direction according
to installation requirements, complying with the maximum lengths indicated
in the table.
Arrange the fl ue gas discharge pipe so it slopes by 1% towards the
boiler.
Non-insulated outlet pipes are potential sources of danger.
The boiler automatically adapts the purging to the type of installation
and the length of the pipe.
Do not obstruct or choke the combustion air suction pipe in any way.
For installation, follow the instructions supplied with the kit.
Horizontal
straight length *
concentric pipe ø 60-100 mm
pressure drop
45° bend 90° bend
5,85 m 1,3 m 1,6 m
*“Straight length” means without bends, drainage terminals or joints.
Vertical
straight length *
concentric pipe ø 60-100 mm
pressure drop
45° bend 90° bend
6,85 m 1,3 m 1,6 m
*“Straight length” means without bends, drainage terminals or joints.
If the boiler must be installed with drainage below, use the special elbow (kit
available on request – see Parts Catalogue).
In this type of installation, the inner pipe of the elbow must be cut at the
point shown in
fi g. 22 to allow the elbow itself to be inserted more easily into
the fl ue gas discharge on the boiler.
Concentric pipes (ø 80-125)
For this con fi guration, the special adaptor kit must be fi tted. The concentric
pipes can face in the direction most suitable for installation requirements.
For installation, follow the instructions supplied with the speci
fi c condensing
boilers kits.
straight length *
concentric pipe ø 80-125 mm
pressure drop
45° bend 90° bend
15,3 m 1,0 m 1,5 m
*“Straight length” means without bends, drainage terminals or joints.
Twin pipes (ø 80 mm) ( fi g. 23)
The twin pipes can face in the direction most suited to the installation re-
quirements. For installation, follow the instructions supplied with the spe-
ci
fi c accessory kit for condensing boilers.
To use the combustion air suction pipe, one of the two inlets (A and B) must
be selected. Remove the closure plug which is
fi xed using screws, and use
the speci fi c adaptor relating to the inlet selected (C air inlet adaptor ø 80 - D
air inlet adaptor from ø 60 to ø 80) available as an accessory.
Arrange the fl ue gas discharge pipe so it slopes by 1% towards the
boiler.
The boiler automatically adapts the purging to the type of installation and
the length of the pipes. Do not obstruct or choke the pipes in any way.
Refer to the graphs to fi nd the maximum lengths of the single pipe.
The use of longer pipes reduces the boiler output.
maximum straight length *
twin pipes ø 80 mm
pressure drop
45° bend 90° bend
45+45 m 1,0 m 1,5 m
*“Straight length” means without bends, drainage terminals or joints.
PRESSURISED COLLECTIVE CHIMNEY 3CEP
3CEp installations are available only with the dedicated accessory
(optional).
The B23P/B53P con fi guration is forbitten in case of installation in
pressurised collective chimney.
Maximum pressure of the pressurised collective chimney must not
exceed the 35 Pascal.
Maintenance in case of pressurised collective chimney must be
performed as indicated in the speci fi c chapter “Maintenance in-
structions”.
For 3CEp installations with dedicated accessory, it is necessary
change the setting of minimum fan speed according the accessory
instructions.