Immergas Zeus Superior User manual

ZEUS
Superior kW
Wall-hung, room sealed boilers
with storage tank
ZEUS Superior kW

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ZEUS Superior kW
Wall-mounted boiler with storage tank with fan
assisted sealed chamber
ZEUS Superior 24 kW
ZEUS Superior 28 kW
ZEUS Superior 32 kW
General features.
ZEUS Superior kW is a wall-mounted fan assisted generator
with sealed chamber (type C) for the heating and production
of domestic hot water with storage tank.
e boiler is type approved for installation outside of the
building in a partially protected place.
N.B.: A partially protected place is one in which the appliance
is not exposed to the direct action of the weather (rain, snow,
hail, etc..).
e boiler can also be installed in B22 conguration using the
relevant kit (optional).
It is equipped with a stainless steel storage tank coil with total
capacity of 60 litres and a standard 2 litre domestic hot water
expansion vessel.
e ZEUS Superior kW series boilers are available with useful
heat output of 24 kW (20,640 kcal/h), 28 kW (24,080 kcal/h)
and 31.7 kW (27,250 kcal/h) with useful eciency exceeding
90%.
Adjustment and control are managed by an integrated P.C.B.
with microprocessor with continuous ame modulation by
means of two sensors (domestic hot water and heating).
e new electronics allow the connection of the appliance
to the CAR and to the Super CAR; both allow remote ma-
nagement and control of the boiler with extreme simplicity.
Moreover, the Super CAR allows the display of the relative
humidity of the room and the envisioned weather.
Using the Super CAR it is possible to indierently change
some settings of the boiler control panel and the Super CAR
control panel, such as: Summer Winter selection, domestic
water set-point, domestic water comfort status, Reset.
e boiler has a standard anti-freeze device that protects it to
a minimum temperature of -5°C (optional to -15°C).
e hydraulic circuit is provided with a copper water-
gas heat exchanger, which is characterised for the high
circulation available in the primary circuit and uses the new
hydraulic unit in composite material.
e circulation pump, the electric three-way valve and the
hydraulic circuit control devices are housed on this unit
(absolute system pressure switch, 3 bar safety valve, system
adjustable by-pass, etc...).
e intake of combustion air inside the sealed chamber and
the discarge of ue are ensured by a fan, ues functioning is
contolled by ow meter.
e boiler operating parameters are set using the buttons and
knobs while the status display, the functioning mode and the
malfunctions, takes place using a back-lit digital display.

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Main dimensions and connections.
Key:
G - Gas supply
R - C.H. return
M - C.H. ow
RC - D.H.W. re-circulation (option)
AC - D.H.W. ow
AF - Domestic cold water inlet
V - Power supply connection
Height
(mm)
Width
(mm)
Depth
(mm)
900 600 466
ATTACHMENTS
GAS SYSTEM DOMESTIC
WATER
G R M AC AF
1/2” 3/4” 3/4” 1/2” 1/2”

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ZEUS Superior kW control panel.
Key:
- Stand-by button - On
A- Functioning mode selection button
summer ( ) and winter ( )
B- Domestic hot water priority button ( )
C- Reset (RESET) / exit menu (ESC) button
D- Menu entry (MENU) / data conrmation (OK) button
1 - Domestic hot water temperature selector
2 - Set domestic hot water temperature
3 - Heating temperature selector
4 - Set heating temperature
5 - Anomaly presence
6 - Boiler operating status display
8 - Flame presence symbol and relative power scale
9-7 Primary heat exchanger outlet water temperature
10 - Boiler in Stand-by
11 - Boiler connected to remote control (Optional)
12 - Operating in summer mode
13 - Anti-freeze function in progress
14 - Operating in winter mode
15 - Operation with priority domestic hot water active
16 - Connection to external tools for technician
17 - Menu entries display
18 - Operation with external temperature active probe
19 - Data conrmation or menu access display
20-7- External temperature display
with external probe connected (optional)
21 - Reset request or menu exit display
22 - Chimney sweep function in progress
23 - Boiler manometer
24 - Muliti-function display

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ZEUS Superior kW main components.
Key:
1 - Filling valve
2 - Draining valve
3 - Motorized 3 - way valve
4 - Gas valve
5 - System pressure switch
6 - Boiler pump
7 - Automatic vent valve
8 - Fume ow meter
9 - Primary heat exchanger
10 - Fan
11 - Sample points (air A) - (ue F)
12 - System expansion vessel
13 - D.H.W. probe
14 - D.H.W. expansion vessel
15 - Stainless steel storage tank
16 - 3 bar safety valve
17 - 8 bar safety valve
18 - Storage tank draining valve
19 - Sealed chamber
20 - Flue hood
21 - Safety thermostat
22 - Flow probe
23 - Combustion chamber
24 - Ignition and detection electrodes
25 - Burner
26 - Adjustable by-pass

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e hot water used for heating and DHW is produced by a pri-
mary and secondary (DHW) circuit according to demand.
ZEUS Superior kW hydraulic layout.
18 - System pressure switch
19 - Draining valve
20 - Motorized 3 - way valve
21 - Flow probe
22 - 3 bar safety valve
23 - Filling valve
24 - D.H.W. expansion vessel
25 - 8 bar safety valve
26 - Cold inlet one - way valve
27 - Storage tank drain valve
G - Gas supply
AC - D.H.W. ow
AF - Domestic hot water inlet
R - C.H. return
M - C.H. ow
Key
1 - Gas valve
2 - Stainless steel storage tank coil
3 - Magnesium anode
4 - Stainless steel storage tank
5 - Fume ow meter
6 - Burner
7 - Combustion chamber
8 - Primary heat exchanger
9 - Flue hood
10 - Fan
11 - Sealed chamber
12 - Flow probe
13 - Safety thermostat
14 - Automatic vent valve
15 - System expansion vessel
16 - Boiler pump
17 - Adjustable by-pass

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Primary circuit (boiler circuit).
e primary circuit (and its relative control and safety devices)
is enabled every time there is a heating or DHW request.
Operation.
e heat in combustion exhaust is transferred by copper ns
to the water-gas exchanger (8). e water-gas exchanger then
transfers such heat to the water circulating inside it thanks to
the boiler pump (16).
e water is then pushed directly into the system or it can be
diverted to the storage tank coil (2).
is depends on the position of the electric 3-way valve (20)
Head (kPa)
Flow rate Litres/h
A
A = Head available to the system at maximum speed with by-pass excluded (adjusting screw completely tightened)
B = Head available to the system at maximum speed (screw tightened by 1.5 revulution with respect to the completely loose adjusting screw)
C = Head available to the system at maximum speed with by-pass open (adjusting screw completely loose)
Head (m H2O)
ZEUS Superior 24 kW
Head (kPa)
Flow rate Litres/h
Head (m H2O)
ZEUS Superior 28 kW
B
C
A
B
C
which, according to the type of request, either allows water to
ow through the central heating ow system (M) and return
(R) pipes or diverts the water towards the coil (2).
Flow rate - head graph.
e shape of the curve representing the ow rate-head ratio
will depend on how the system by-pass is adjusted; thus, the
position of the by-pass will provide more or less head to the
system. e graph below illustrates the characteristic curves
according to the by-pass adjustment.

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Boiler pump (1).
e boiler pump operates on the primary circuit return, im-
mediately downstream of the 3-way valve which is connected
to. It is part of the integrated multi-function group made out
of composite material.
e automatic vent valve (2) is also housed in the hydraulic
group casing.
Primary heat exchanger (1).
e primary heat exchanger is a lamellar water-gas heat ex-
changer with copper pipes and ns (No. 77 ns on the 24 kW,
No. 89 ns on the 28 kW version and No. 105 ns on the 32 kW
version). e NTC central heating ow probe (2) and the safety
thermostat (3) are positioned on its outlet pipe (ow).
Primary heat exchanger is assembled with four tubes connected
in series (4).
Pipes with threaded ttings connect it to the pump ow and
the primary circuit ow.
Return
A = Head available to the system at maximum speed with by-pass excluded (adjusting screw completely tightened)
B = Head available to the system at maximum speed (screw tightened by 1.5 revulution with respect to the completely loose adjusting screw)
C = Head available to the system at maximum speed with by-pass open (adjusting screw completely loose)
ZEUS Superior 32 kW
Head (m H2O)
Head (kPa)
Flow rate Litres/h
A
B
C
1
3
4
2
1
2
Flow

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Motorized 3-way valve.
e electric 3-way valve operates on the primary circuit re-
turn and, according to the type of request (DHW or central
heating), it either directs hot water to central heating system
or storage tank coil.
Such operation depends on the position of the shutter (5),
which either closes the way toward the system opening the way
toward the storage tank (DHW position) or vice-versa (central
heating position).
e shutter (5) can be shifted to either position by powering
the motor (1).
e hydraulic part consists in a group made of composite
material (2) (which includes the pump), driven by a motor (1)
which shifts the valve as necessary.
Operation.
When central heating or DHW position is required, the motor
(1) is switched on by the P.C.B.
Every 180° turn of the motor, shifts the shutter (5) and either
compresses (central heating position) or releases (DHW position)
the shutter opposing spring (4).
Both the spring (4) and the shutter (5) are located inside the
3-way cartridge (3).
When the requested position is reached, it alternatively opens
and closes one of the two limit micro-switches (6) inside the
motor casing (1).
Such procedure makes it possible for disconnection of power
supply to the motor, locking the motor in the position it is in
and enable motor function only when a dierent request is
received (DHW or central heating request).
PUMP
RETURN
SYSTEM
RETURN
COIL
RETURN
Storage
tank coil
return
Pump
ow
System
return

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Safety devices and controls.
Adjustable system by-pass (2).
e adjustable system by-pass guarantees water circulation in
the primary circuit (between ow and return) even when high
resistance in the system would not allow circulation.
By-pass is assembled on the ow manifold group (1) and can be
adjusted by acting on a screw to be accessed from underneath
the valve support plate.
System lling valve group (3).
e system lling valve group consists in a ball valve located
between the boiler circuit and the cold domestic water inlet,
which allows the central heating system to be pressurized.
e cock is connected to a lling tting (4) which is connected
to the 3-way valve group.
Absolute pressure switch (5).
Detects the pressure inside the primary circuit.
It is housed in the ow collector unit(1) and is coupled to a
micro switch that prevents burner operating when the pressure
detected is lower than 0.3 bar.
It prevents over-heating of the main heat exchanger.
Automatic vent valve (6).
e vent valve automatically expels any gaseous substances
from the boiler circuit.
e valve is located on the pump ow pipe directly on the
hydraulic group.
3-bar safety valve (7).
e safety valve ensures 3-bar safety pressure not to be ex-
ceeded.
It is inserted on the front of the ow manifold group (1) and
it is secured by a clip.
When triggered, the safety valve releases water from the ow
pipe.
System expansion vessel (8).
e expansion vessel compensates the variations in volume
caused when water is heated, and therefore it changes in
pressure.
e vessel has a 10-litre capacity (7.1 liter useful capacity) and
a 1.0 bar factory set pressure.
It is located above the storage tank and is connected to the
3-way valve group by a copper pipe.
System ow
8
46
3

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Multi-function integrated group GIM.
Before replacing the various components present on the GIM,
the water present inside the primary circuit must be discharged
by loosening the system draining valve (15).
Before carrying out this operation, check that the system lling
valve is closed.
Replacement of the three-way valve cartridge.
In order to replace the three-way cartridge (1) remove the
blocking clip (2) and extract the electric motor (3), then
loosen the two fasteners screw (4) that x the cartridge (1) to
the composite body (6).
N.B.: on re-mounting the cartridge, pay particular attention
that the two sheet steel reinforcement plates are introduced
correctly (5).
Replacement of the circulation pump motor.
In order to replace the pump body remove the four screws (8)
that x the motor (7).
Replacement of the automatic air vent valve.
In order to replace the air vent valve remove the relevant
blocking clip and extract the valve (9) paying attention not to
damage the relative O-ring.
N.B.: when remounting the air vent pay particular attention
that the O-ring is inserted correctly.
Replacement of the by-pass cartridge.
To replace the by-pass cartridge loosen the two screws (12) that
x the cartridge body (11) to the ow collector (10).
N.B.: on re-mounting the by-pass cartridge body pay particular
attention not to damage the gaskets.
Replacement of 3 bar safety valve.
In order to replace the 3 bar safety valve (13) remove the
relative blocking clip.
N.B.: on re-mounting the 3 bar valve, pay particular attention
that the relative O-ring is inserted correctly.
Replacement of system pressure switch.
In order to replace the system pressure switch (14) remove the
relative blocking clip.
N.B.: on re-mounting the system pressure switch pay particular
attention that the relative O-ring is inserted correctly.
3
2
1
45
9
8
14
13
11
7
6
12
10
15

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Secondary circuit (domestic water circuit).
DHW circuit is activated every time it is necessary to adjust
the temperature of water in the storage tank (2) to desired
temperature measured by the DHW NTC probe (9).
Such procedure is due to DHW being drawn from a tap or to
compensate for heat loss in the water heater itself.
Operation.
Following a request for DHW, the integrated P.C.B. activates
the boiler pump (7) and enables the electric 3-way valve mo-
tor (8).
e valve then shifts to DHW position (see electric 3-way
valve operation paragraph), the system return pipe (R) closes
and at the same time the way toward the storage tank coil
opens up (4).
e above arrangement prevents circulation within the central
heating circuit and allows for circulation within the coil (4).
e coil surface allow for absorbing of heat in the primary
circuit by the domestic cold water.
erefore, during this phase, central heating function is halted
and DHW production is given priority.

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Storage tank.
It is a storage tank with coil and total capacity of 60 litres (useful
54 litres) built entirely out of stainless steel and is completely
insulated with self-extinguishing polystyrene.
It is made up of an external liner enclosed in the lower part by
a ange xed using12 screws.
A stainless steel pipe (4) is located inside the tank, shaped like
a concentric spiral (coil) which develops through the lower
part of the boiler. e heat exchange between the hot water
in the primary circuit and the water in the storage tank takes
place through the coil surface.
is keeps the water in the storage tank at a constant tem-
perature and guarantees instantaneous production of DHW
whenever water is drawn.
If necessary, the coil can be removed from the storage tank after
the lower inspection ange has been removed.
Storage tank integrity and function are guaranteed by the
following devices:
Anode (1).
e anode is inserted in the storage tank and protects it against
corrosive actions of galvanic currents.
It is screwed onto the lower ange.
Polyphosphate dispenser (optional).
e polyphosphate dispenser prevents the formation of scale
on the coil surface. e kit is assembled on domestic cold
water inlet pipe.
Recirculation kit (option).
Recirculation kit allows for DHW recirculation system pipes
to be connected.
It consists in a pipe, which is inserted in the boiler after the
anode and relative plug have been removed.
When the kit is installed, the anode is screwed onto the end
of the pipe.
An additional kit is available (option) which includes a pump
for DHW recirculation system.
e kit is not protruding outside the boiler clearance while the
pump slightly extends beyond the plastic grille at the bottom
of the appliance.
DHW NTC probe (B2) (9).
e DHW probe allows integrated P.C.B. to read temperature
of water inside the storage tank.
It is secured to the external wall of the water tank and it is
inserted in an sample point.
Safety valve group (13).
e safety valve group is located in the lower part of the storage
tank near the domestic cold water inlet.
As well as an 8-bar valve (10) which prevents the storage tank
safety pressure from being exceeded, it includes:
- a lter, a 12 l/min ow limiter (24 kW version and 28 kW
version) and14 l/min (32 kW), a storage tank draining valve
with hose union (12) and a one-way valve (see hydraulic cir-
cuit paragraph, detail “5”) in order to ensure that increased
pressure DHW does return toward water mains supply.
11
Domestic hot water expansion vessel (11).
DHW expansion vessel compensates for any variations in
volume caused by water in the storage tank.
It is connected to the safety valve group and has a 2-litre ca-
pacity with a 3.5-bar factory set pressure.
Coil ow
9
14
10
13
12
Cold
water
inlet
Hot
water
outlet
Coil return

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e gas circuit consists in an atmospheric burner and a modu-
lating gas valve, which respectively allow gas combustion and
adjustment of gas ow.
Operation.
When electricity is supplied to the main coils (3) both shutters
inside the valve open, allowing gas to ow toward the burner.
e outlet ow rate/pressure is adjusted by acting on the gas
valve stabilizer through the modulation coil (1).
Fuel is injected through the burner nozzles (7) into the hori-
zontal Venturi pipes (ramps). A mixture of air and gas forms
inside the pipes and is then ignited by the spark generated by
ignition electrodes (5).
Modulating gas valve.
Gas valve (SIT 845) is equipped with two main coils (3) and a
modulating coil (1) managed by the integrated P.C.B.
It acts on the gas valve stabilizer and proportionally adjusts the
outlet pressure to the continuous current running through it
(see Gas adjustments).
Main electric coils (3).
ere are two ON-OFF type coils powered (230 V AC) by the
integrated P.C.B. when burner ignition is required.
e coils are connected in parallel and supplied by mains power
supply via a connector (2).
Modulation coil (1).
e modulation coil is a low voltage coil managed by the
integrated P.C.B.
Gas circuit.
It acts on the gas valve stabilizer and proportionally adjusts
the outlet pressure to the continuous current running through
it.
Burner.
e burner consists in horizontal Venturi pipes (6) into which
the gas is injected through the same number of nozzles (7)
assembled on the manifold (8).
e diameter of the nozzles varies according to the type of gas
used (see technical data sheet).
ere are 11 nozzles on 24 kW version, 13 nozzles on 28 kW
version and 15 nozzles on 32 kW version.
Ignition takes place thanks to an integrated electronic P.C.B.,
which controls the ignition (5), and detection (4) electrodes.
Ignition electrode (5).
e ignition electrodes are controlled by the integrated P.C.B.,
which triggers an electric spark between the electrodes, and
the air-gas mixture ignites as soon as it comes into contact
with the spark.
e electrodes are located at the front of the burner.
Detection electrode (4).
e detection electrode is controlled by the integrated P.C.B.
and it detects whether the burner has been ignited.
It is located at the front of the burner near the ignition elec-
trodes.
COIL POWER SUPPLY RESISTANCE
EV1 230 V AC 6.25 kΩ
EV2 230 V AC 860 Ω
Modulation coil 9 V DC 22 Ω
Modulation
coil
Gas valve
connector
EV1
EV2
Common
4
5
6
7
8




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Gas adjustments.
In order to adjust maximum and minimum gas pressure it is
necessary to act on the valve. Any adjustments must comply
with the values indicated in the charts regarding each boiler
for the type of used gas (see the technical data sheets).
Use a dierential gauge to carry out any measurements. Con-
nect the positive pressure point to the gas valve outlet (4) and
to the positive pressure point present in the ue ow meter
support found under the sealed chamber (see gure).
Key:
1 - Coil
2 - Minimum power regulation screws
3 - Maximum power regulation nut
4 - Gas valve outlet pressure socket
5 - Gas valve inlet pressure socket
6 - Protective hood
SIT 845 valve
SIT 845 gas valve.
Maximum pressure adjustment.
Set the DHW temperature selector to maximum output and
then open a tap.
Turn the brass nut (3) clockwise to increase the burner pressure
and anti-clockwise to decrease.
Minimum pressure adjustment.
(First, adjust maximum pressure and then minimum pressu-
re). Disconnect power supply from the modulation coil; then
turn the screw (2) clockwise to increase the burner pressure
and anti-clockwise to decrease it.
Gas transformation.
e adaptation to the type of gas dierent to that for which
the boilers are prepared as per standard is performed using the
relevant kit (natural gas or LPG).
e transformation consists in the replacement of the burner
nozzles and modication of the "P56" parameter, which can
be programmed on the integrated circuit board (see integrated
P.C.B. programming).
e domestic hot water minimum and maximum pressures
are therefore adjusted on the gas valve in the way described
above.
e adjustments of the maximum and minimum powers in the
heating phase can be set through the parameters (see integrated
P.C.B. functioning).
e ignition pressure of the burner is not adjusted as the
particular functioning of the boarddoes not require this type
of calibration (see integrated P.C.B. functioning).

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Flue circuit.
Operation.
After going through the water-gas exchanger (2), the combu-
stion products are conveyed into a hood (4) topped by a ue
extractor (5) (fan).
e fan ensured forced discharge of any ue gas and at the
same time creates a depression in the sealed chamber (3) which
allows combustion air intake from the outside.
Correct ue exhaust ow is ensured by a pressure switch (6)
which enables (or does not) burner ignition.

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pipe (11) which is connected to the negative pressure point
of the ue pressure switch (6) and to the pressure point on
the fan.
e positive pressure point (10) is connected directly to the
inside of the sealed chamber.
Flue ow meter (6).
It is positioned in the lower external part of the sealed chamber
and detects, through the relevant point, the pressure dierence
between the inside of the fan (negative signal) and the inside
of the sealed chamber (positive signal).
e signal generated by the ue ow meter (6) is managed by
the circuit board in order to adjust fan speed (5), in a way to
maintain the pressure dierence constant at a value between
60 and 90 Pascal (between 6.1 and 9.2 mm. H2O), which can
be measured by the relevant pressure sockets (9-10).
When the pressure reaches the value set on the integrated
P.C.B. the burner can be ignited.
Fan (5).
e ue discharging fan operates downstream from the com-
bustion chamber and is physically installed on the upper part
of the ue hood (4) from where it extracts ue and directs
them to the ue system ducts the boiler is connected to. At
the same time, it ensures combustion air ow into the sealed
chamber.
e fan is controlled by the integrated P.C.B. and its function
essentially follows the burner operation.
Air/ue sample points (7-8).
ere are two sample points on the upper side of the sealed
chamber (they are accessible from the front), which can be used
to take samples of combustion air (7) and ue (8).
e two sample points are closed by one single plastic plug.
(13).
Flue pressure switch signal pressure points
(9-10).
In the lower external part of the sealed chamber, there are two
pressure points, which can be used to verify the signal on either
end of the ue pressure switch (6).
e negative pressure point (9) is connected to a silicone
78
42
610
9
511
11
13

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Intake and exhaust systems.
(see intake and exhaust terminals instructions).
e ZEUS Superior kW boiler is arranged for connection to
the appropriate push-tting intake/exhaust pipes and can be
installed inside the home or outside the home (in a partially
protected place) in the following congurations.
Outdoors (in a partially protected place):
- sealed chamber and fan assisted with direct intake (type C)
using a compulsory upper cover kit (optional);
- with sealed chamber and forced draught (type C) using
the vertical or horizontal concentric kits, keeping the cap
mounted, without the obligation to use the upper cover
kit.
Indoors:
- open chamber and fan assisted (type B22) using a compulsory
upper cover kit (optional);
- sealed chamber and fan assisted (type C) using the vertical
or horizontal concentric kits or the Ø80/80 separator kit.
For that regarding the head losses relative to each accessory,
for the various combinations that can be performed, see the
instructions relative to the intake and exhaust terminals
(boiler instruction book).
e coupling of the accessories (curves, extensions, terminals)
is the push-tting type and sealing is ensured by appropriate
gaskets with silicone lip seals.
Sealed chamber and forced draught
conguration with direct intake for installation
outdoors in a partially protected place (see
gure at the side).
Using an appropriate cover (1) to be positioned on the upper
part of the sealed chamber, the boiler can be installed outdoors
in a partially protected place.
Intake.
Mounting of the cover (1) envisions the removal of the cap
(3) closing the hole present in the upper part of the sealed
chamber.
Attention:
For model 28 kW shaped sheet steel must be mounted (5)
instead of the cap (3).
For model 32 kW at sheet steel must be mounted (4) instead
of the cap (3).
e intake of combustion air takes place directly from the
environment making use of the free space between the lowerp
art of the cover (1) and the upper part of the boiler.
Exhaust.
e connection to the exhaust pipes with diameter of 80 mm
is obtained using the ange (2) used in the divided systems.
e use of the appropriate accessories aloows the horizontal
discharge (A) or vertical discharge (B).
To prevent condensate problems, the exhaust pipe must be
limited to 5 straight metres for normal pipes and 12 straight
metres for insulated pipes.
e maximum length accepted is 12 straight metres.
Open chamber and forced draught congura-
tion (type B22) for indoor installation (see gure
above).
e previously-described cover kit is used.
By removing the cap (3) present on the selaed chamber, air
intake takes place directly from the room in which the boiler
is installed.
e ues are discharged through special pipes wih a diameter
of 80 in an individual ue or directly to the outside.
BA
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STZSkW ed 12/07 ZEUS Superior kW
Technical DocumentationTechnical Documentation
Sealed chamber and forced draught conguration
(type C).
Exhaust.
e connection to the exhaust pipes takes place using a ange
(1) or a anged bend to attach to the tting (4) present on the
upper part of the sealed chamber by placing a shaped gasket
between them (2).
e ange diers depending whether the divided or concentric
system is used.
In the rst case the passage for combustion air intake (5) is
closed while it is used in the second case.
Intake.
Using the divided system, the connection to the intake pipes
takes place in a similar way to the exhaust pipes, they being
connected to the hole with diameter of 80 mm (3) present in
the upper part of the sealed chamber.
If coaxial pipes are used, intake of the combustion air using
the concentric hole outsideof the exhaust tting (5).
Intake/exhaust kit.
e kits with relative accessories allow the use of four concentric
systems and two divided systems.
For that regarding head losses relative to each accessory, the
various combinations that can be carried out, follow the
instructions relative to the intake and exhaust terminals
(see boiler instructions book).
e coupling of the accessories (curves, extensions, terminals)
is snap-t type and sealing is ensured by the relevant silicone
lip seals.
Ø 60/100 push-t horizontal concentric kit.
e ue duct (Ø 60 mm) is inserted directly in the intake
duct (Ø 100 mm).
Connect to the boiler using a 90° bend (2) which can be turned
and face any direction. Use the required extensions in order to
reach air and ue terminal (3).
Maximum allowable overall length without considering the
rst bend (2) is 3 straight horizontal meters.
Ø 80/125 push-t horizontal concentric kit.
e ue duct (Ø 80 mm) is inserted in the intake duct (Ø
125 mm).
Connect to the boiler using a 90° bend with a 60/100 diameter
(2) which can be turned in order to face any direction. Using
the 60/100-80/125 adapter (3) and the appropriate extensions,
connect to the air and ue terminal (4).
Maximum allowed overall length without considering the rst
bend (2) is 7.3 straight horizontal meters.
1
25
4
3
1
26
4
35
1
45
2
3