Immergas VICTRIX ZEUS Superior kW I User manual

VICTRIX ZEUS Superior kW I
Wall-mounted condensing boiler
with domestic hot water
storage tank
VICTRIX ZEUS Superior kW I

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VICTRIX ZEUS Superior 26-32 kW I
Wall-mounted, fan-assisted condensing boiler
with domestic hot water storage tank
VICTRIX ZEUS Superior 26 kW I
VICTRIX ZEUS Superior 32 kW I
VICTRIX ZEUS Superior kW I is a wall-mounted, sealed
chamber, fan-assisted generator (type C) for central heating and
the production of domestic hot water with storage tank.
e VICTRIX ZEUS Superior kW I range are type-approved
for installation outside the building in a partially protected
place.
N.B.: A partially protected location 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 the B23 conguration using
the relevant kit (optional).
e appliance is available with useful heat output of 21.0
kW(25.8 kW in DHW mode) and 32 kW which, thanks to
condensing technology, distinguishes itself due to its high
eciency and large eld of modulation (from 20 % to 100 %
of the nominal heat output).
e boiler has a total premix combustion system that gua-
rantees particularly reduced pollutant emissions and allows
functioning with natural gas or LPG.
Adjustment and control are entrusted to an integrated P.C.B.
with micro processor with continuous ame modulation by
means of 3 sensors (1 DHW and 2 CH).
e new electronics allows the connection of the appliance
to the Comando Amico Remoto remote control and to the
Super Comando Amico Remoto remote control; both allow
to easily manage and check the boiler at a distance. Moreover,
the Super CAR allows the display of the relative humidity of
the room and the weather forecast.
General features.
Using the Super CAR it is possible to indierently vary some
settings from the boiler control panel and from the Super CAR
control panel, such as: selection of Summer Winter, DHW set
point, DHW comfort status, Reset.
e boiler has an anti-freeze safety device as per standard
that protects it to a minimum temperature of -5°C (optional
to -15°C).
e hydraulic circuit has a water-gas heat exchanger with
coil in STAINLESS STEEL and uses the new hydraulic unit
composite material which, as well as the pump and electric
3-way valve that according to necessity allow boiler water
to circulate in the CH system or in the storage tank coil for
the production of DHW, also houses the hydraulic control
devices (absolute system pressure switch, 3 bar safety valve, system
adjustable by-pass, etc...).
e boiler functioning parameters are set using the buttons
and knobs while display of the status, functioning mode and
anomalies takes place on the back-lit digital display.
e VICTRIX ZEUS Superior kW I boiler must be installed
using the intake/exhaust kits or the ducting systems (Ø 60 mm
rigid, Ø 80 mm rigid and Ø 80 mm exible) realised in plastic
and designed expressly for Immergas condensing boilers.

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VICTRIX ZEUS Superior kW I main components and connections.
Key:
V - Electric connection
G - Gas supply
SC - Condensate drain (minimum internal diameter
Ø 13 mm)
R - System return
M - System ow
RC - Domestic hot water pump (optional)
AC - Domestic hot water outlet
AF - Domestic hot water inlet
Height (mm) Width (mm) Depth (mm)
900 600 466
CONNECTIONS
GAS DOMESTIC
HOT WATER SYSTEM
GAC AF R M
1/2” 1/2” 1/2” 3/4” 3/4”

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VICTRIX ZEUS Superior kW I control panel.
Key:
- Stand-by - On Button
A- Summer ( ) and winter ( ) functioning mode selection
button
B- Domestic hot water priority button ( )
C- (RESET) / menu exit (ESC) reset button
D- Menu entry button (MENU)/ data conrmation (OK)
1 - Domestic hot water temperature selector switch
2 - Domestic hot water temperature set
3 - Central heating water temperature selector switch
4 - Central heating temperature set
5 - Anomaly presence
6 - Display of boiler functioning status
8 - Flame presence symbol and relative power scale
9 and 7 - Primary heat exchanger output water temperature
10 - Boiler in Stand-by
11 - Boiler connected to remote control (Optional)
12 - Functioning in summer mode
13 - Anti-freeze function in progress.
14 - Functioning in winter mode
15 - Functioning with DHW priority active
16 - Connection to external tools for technician
17 - Display of menu items
18 - Functioning with external temperature probe active
19 - Display of data conrmation or menu access
20 and 7- External temperature display
with external probe connected (optional)
21 - Display of reset or exit menu request
22 - Chimney sweep function in progress
23 - Boiler manometer
24 - Multifunction display

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VICTRIX ZEUS Superior kW I main components.
Key:
1 - System lling valve
2 - Condensate drain trap
3 - System draining valve
4 - Gas valve
5 - ree-way valve (motorised)
6 - 3 bar safety valve
7 - System pressure switch
8 - Boiler pump
9 - Air vent valve
10 - Fan
11 - Gas nozzle
12 - Venturi
13 - Detection electrode
14 - Condensation module
15 - Flue safety thermostat
16 - Air intake pipe
17 - Sample points (air A) - (ue F)
18 - Negative signal pressure point
19 - Burner
20 - Positive signal pressure point
21 - Manual air vent valve
22 - Ignition electrodes
23 - System expansion vessel
24 - Delivery probe
25 - Safety thermostat
26 - Domestic hot water probe
27 - D.H.W. expansion vessel
28 - Return probe
29 - Stainless steel storage tank
30 - 8 bar safety valve
31 - Storage tank unit draining valve

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e hot water used for central heating and domestic hot water
is produced via a primary and a secondary circuit (DHW)
which are aected according to necessity.
VICTRIX ZEUS Superior kW I hydraulic diagram.
Key:
1 - Condensate drain trap
2 - Stainless steel coil for storage tank
3 - Magnesium anode
4 - Stainless steel storage tank
5 - Gas valve
6 - Gas valve outlet pressure point (P3)
7 - Air/gas Venturi manifold
8 - Fan
9 - Gas nozzle
10 - Detection electrode
11 - Flue safety thermostat
12 - Air intake pipe
13 - Condensation module
14 - Manual air vent valve
15 - Flue hood
16 - Air sample point
17 - ∆p gas pressure point
18 - Flue sample point
19 - Flow probe
20 - Safety thermostat
21 - Burner
22 - Ignition electrodes
23 - Condensation module cover
24 - Venturi negative sign (P2)
25 - Venturi positive sign (P2)
26 - Return probe
27 - System expansion vessel
28 - Boiler pump
29 - Adjustable by-pass
30 - System pressure switch
31 - System draining valve
32 - 3-way valve (motorised)
33 - Domestic hot water probe
34 - 3 bar safety valve
35 - System lling valve
36 - Domestic hot water expansion vessel
37 - 8 bar safety valve
38 - Cold water inlet non-return valve
39 - Storage tank drain cock
G - Gas supply
SC - Condensate drain (minimum internal diame-
ter Ø 13 mm)
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System ow

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Primary circuit (boiler circuit).
e primary circuit, with relative control and safety devices,
is started every time there is a central heating or domestic
hot water request.
Operation (see hydraulic diagram).
e heat contained in the combustion products is absorbed
by the pipes of the water-gas primary heat exchanger with
coil (13) which then gives the heat up to the water made to
circulate inside the boiler pump (28).
e water is introduced directly into the system or can be
diverted inside the storage tank coil (2).
is depends on the position of the motorised 3-way valve
Head (kPa)
Flow rate Litres/h
A = Head available to the system on the third speed with by-pass excluded (adjustment screws tightened fully home)
B = Head available to the system on the second speed with by-pass excluded (adjustment screws tightened fully home)
C = Head available to the system on the rst speed with by-pass excluded (adjustment screws tightened fully home)
D = Total head available to the plant on the third speed (screws tightened by 1.5 revs with respect to the completely loose adjustment screws).
E = Total head available to the plant on the second speed (screws tightened by 1.5 revs with respect to the completely loose adjustment screws).
F = Total head available to the plant on the rst speed (screws tightened by 1.5 revs with respect to the completely loose adjustment screws).
Head (m H2O)
VICTRIX ZEUS Superior 26 kW I
Head (kPa)
Flow rate Litres/h
Head (m H2O)
VICTRIX ZEUS Superior 32 kW I
A
C
(32), which depending on request, allows ow towards the
system ow (M) and return (R) pipes or causes diversion
towards the coil (2).
Head-ow rate graphics.
e progress of the curve that represents the ow rate-head ratio
available to the system, depends on the functioning speed of the
pump and adjustment of the system by-pass which, according
to the position, allows to set greater or less head on he system.
e graphs below show the characteristic curves.
E
F
A
CB
F
E
B
D
D

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1
4
35
Boiler pump (1).
Operates on the primary circuit return immediately after the
3-way valve to which it is connected. It is part of the integrated
multifunction unit realised in composite material.
e pump leaves the factory with the speed set at "AUTO".
is means that the pump functions at three variable speed
in a way to keep the temperature dierence between ow and
return constant.
ere is a seat on the body where the automatic air vent valve
(2) is housed.
Primary heat exchanger
(condensation module).
It is formed by a casing that contains 4 (version 26 kW) and 5
(version 32 kW) coil-shaped elements.
Each element is made up from 5 elliptical spirals (3).
e entire module is realised in stainless steel and its internal
part makes up the sealed combustion chamber and the con-
densation chamber (2).
VICTRIX ZEUS Superior 26 kW I.
e rst three elements are aected directly by the action of
the cylindrical burner applied to the front, while the fourth is
arranged in the condensation chamber, which is separated from
the combustion chamber by sheet steel (see ue circuit).
To reduce head losses to a minimum and increase the ow rate
available to the system, the ow is made up from the parallel
connection of the rst two elements, the return instead, is made
up from the parallel connection of the last two elements.
VICTRIX ZEUS Superior 32 kW I.
e rst four elements are aected directly by the action of
the cylindrical burner applied to the front, while the fth is
arranged in the condensation chamber, which is separated from
the combustion chamber by sheet steel (see ue circuit).
To reduce head losses to a minimum and increase the ow
rate available to the system, the ow is made up from the
parallel connection of the rst three elements, the return,
instead is made up from the parallel connection of the last
two elements.
For both versions, the heat exchanger inlet is connected to
the pump ow and the outlet, on which the NTC central
heating probe is positioned (1), is connected to the primary
circuit ow.
e primary circuit return and ow pipes are coupled using
threaded ttings with at gasket.
e ue hood (4) is connected to the rear using a relevant
gasket blocked by a metal ring.
e condensate drain is also found in the lower part.
To ease the escape of any air bubbles still present in the coils,
there is a manual air vent in the upper part of the module
(5).
1
2
COMBUSTION
PRODUCTS
RETURN
FLOW
CONDENSATE
DRAIN

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Motorised 3-way valve.
It is an electric 3-way valve operating on he primary circuit
return that allows, according to request o (DHW or CH),
to introduce boiler water into the CH system or the storage
tank coil.
is depends on the position of the shutter (5) which, closes
the passage towards the system opening it at the same time
towards the storage tank (DHW position) or vice versa (CH
position).
e shutter (5) is moved into both positions by powering the
motor (1).
e hydraulic part is made up from a group of composite
material (2) that also integrates the pump and is put into
action thanks to a motor (1) that causes movement according
to necessity.
Operation.
When it is necessary to reach the CH or DHW position, the
motor (1) is activated by the P.C.B.
Functioning of the motor leads to the movement of the shutter
(5) at every 180° rotation and compresses (CH position) or lea-
ves (DHW position) the shutter contrast spring to release (4).
Both the spring (4) and the shutter (5) are situated inside the
3-way cartridge (3).
e hydraulic arrival at the requested position alternatively
causes the opening and closure of one of the two end run micro
switches (6) organised inside the motor box (1).
is allows to remove voltage to the motor blocking it in the
position reached and to enable motor functioning only in the
presence of a dierent request (DHW or CH signal).
Storage tank
coil
return
Flow
Pump
System
Return
PUMP
RETURN
SYSTEM
RETURN
COIL RETURN

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Safety devices and controls.
System adjustable by-pass (2).
Guarantees the circulation of water in the primary circuit
(between ow and return) also when the high resistance of the
system does not allow it.
It is mounted on the ow manifold unit (1) and can be adju-
sted by a screw that can be accessed from the lower part of the
valve support plate.
System ling unit (3).
It is a ball valve positioned between the boiler circuit and the
domestic cold water inlet that allows to pressurise the CH
system.
e valve is connected to a lling tting (4), which is then
connected to the motorised 3-way valve unit.
System pressure switch (5).
Detects the pressure inside the primary circuit.
Its seat is in the ow manifold unit (1) and is coupled to a
micro switch that prevents functioning of the burner when
the pressure detected is below 0.3 bar.
Prevents overheating of the main heat exchanger.
Automatic air vent valve (6).
Allows the automatic expulsion of the gaseous substances that
may be present in the boiler circuit.
It is mounted on the pump ow directly on the hydraulic
unit.
3 bar safety valve (7).
Prevents the safety pressure in the primary circuit from being
exceeded (3 bar).
It is engaged in the front part of the ow manifold unit (1)
and is xed onto the external side using a clip.
Its intervention causes water to escape from the ow pipe.
System expansion vessel (8).
It compensates the volume variation consequent to heating
the water, thus limiting the pressure variations.
It has a capacity of 10 litres (useful 7.1 litres) and a factory-set
pressure of 1.0 bar.
It is positioned in front of the storage tank in the area in front
of the appliance.
46
3
Flow
System
8

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GIM Multifunction Integrated Unit.
3
2
1
45
9
8
14
13
11
7
6
12
10
15
Before replacing the various components present on the GIM
unit, the water present inside the primary circuit must be
drained by opening the system draining valve (15).
Before draining, ensure that the system lling valve is closed.
ree-way valve cartridge replacement.
To replace the 3-way cartridge (1) slide the blocking clip out
(2) and extract the small electric motor (3) and then unscrew
the screw fasteners (4) that x the cartridge (1) to the com-
posite body (6).
N.B.: when re-mounting the cartridge, pay particular atten-
tion to correctly insert the two small sheet steel reinforcement
plates (5).
Pump motor replacement.
To replace the pump body, remove the 4 screws (8) that x the
motor (7) to the composite body (6).
Replacement of the automatic air vent valve.
To replace the air vent valve, the relative blocking clip must
be removed and the valve extracted (9) paying attention not
to damage the relative OR gasket.
N.B.: when re-mounting the air vent valve, pay particular
attention to insert the relative OR gasket correctly.
By-pass cartridge replacement.
To replace the by-pass cartridge, loosen the relevant 2 screws
(12) that x the cartridge body (11) to the ow manifold
(10).
N.B.: when re-mounting the by-pass cartridge body pay par-
ticular attention not to damage the gasket.
3 bar safety valve replacement.
To replace the 3 bar safety valve (13) slide the relative blocking
clip out.
N.B.: when re-mounting the 3 bar valve, pay particular atten-
tion to insert the relative OR gasket correctly.
System pressure switch replacement.
To replace the system pressure switch (14) the relative blocking
clip must be removed.
N.B.: when re-mounting the system pressure switch, pay par-
ticular attention to insert the relative OR gasket correctly.

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Secondary circuit (domestic hot water circuit).
e DHW circuit is aected every time it is necessary to take
the temperature of the water contained in the storage tank to
the desired temperature (2) and is measures using the DHW
NTC probe (9).
is can take place in the case of a domestic hot water with-
drawal or to restore the losses due to heat loss.
Operation.
Following a DHW request, the P.C.B. starts the boiler pump
(7) and powers the electric 3-way valve motor (8).
e consequent shifting of the valve into the DHW position
(see electric 3-way valve functioning) leads to the closure of the
system return pipe (R) and the simultaneous opening of the
passage towards the storage tank coil (4).
In this way circulation inside the CH system is prevented,
while it is allowed in the coil (4) which allows the cold water
to absorb the heat contained in the primary circuit water
through its walls.
e CH phase is excluded in this phase over which the pro-
duction of DHW has priority.

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Storage tank.
It is a 54 litre stainless steel storage tank with coil (useful 51
litres) and insulated using self-extinguishing polystyrene.
It has an external casing enclosed in the lower part by a ange
xed using 12 screws.
A stainless steel double concentric coil is inserted in a pipe
(4) (coil) that passes through the entire height of the storage
tank and through the walls of which heat exchange takes place
between the hot water in the primary circuit and the water
contained in the storage tank.
is allows to keep the storage tank water at a constant tem-
perature and in the presence of a withdrawal guaranteed the
instant production of DHW.
If necessary, it is possible to extract the coil from the storage
tank after having removed the lower inspection ange.
Its regular functioning and its integrity are guaranteed by the
following devices:
Anode (1).
It is inserted into the storage tank and protects it from the
action of galvanic currents.
It is screwed onto the lower ange.
Polyphosphate dispenser (optional).
Prevents the deposit of lime scale on the walls of the coil.
is kit is mounted at the inlet of the domestic cold water.
Pump kit (optional).
Allows to connect the pipes of any DHW pump system.
It consists in a pipe that is inserted in the boiler after the anode
and relative cap have been removed.
With the installation of the kit the anode must be screwed to
the end of the pipe.
A further kit is available (optional) including (pumpe) for the
DHW circulation system.
e kit is installed within the clearance of the boiler and the
pump projects slightly below the appliances lower plastic
grid.
DHW NTC probe (B2) (9).
It allows the P.C.B. to detect the temperature of the water
contained in the storage tank.
It is xed to the external wall of the storage tank and is inserted
inside an immersion sample point.
Safety valve unit (13).
It is a unit situated in the lower part of the storage tank in
correspondence of the domestic cold water inlet.
As well as an 8 bar valve (10) that prevents the safety pressure
in the storage tank from being exceeded, it includes:
- a lter, a 10 l/min ow limiter (26 kW version) and 14 l/min
(32 kW), a storage tank draining valve with hose union tting
(12) and a one-way valve (see hydraulic circuit part. “5”) to
prevent the consequent pressure increase due to heating of
the DHW causes return towards the water network.
11
9
14
10
13
12
DHW expansion vessel (11).
It compensates the volume variation consequent of heating of
the water contained in the storage tank.
It is connected to the safety valve unit and has a capacity of 2
litres with factory-set pressure of 3.5 bar.
Cold
water
inlet
Hot
water
outlet
Coil ow
Coil
Return

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Air-gas circuit.
e circuit consists of a total premix combustion system com-
posed of a fan (5), a pneumatic gas valve (7), a Venturi pipe
(3) and a special cylindrical burner (8) that operates inside the
condensation module.
Operation.
e fan (5) is controlled by the integrated P.C.B. that varies
its speed depending on the output requested.
Its functioning allows to withdraw combustion agent air from
outside of the sealed chamber and introduce it into a pipe
where a Venturi pipe is inserted (3).
At the inlet to the Venturi (3) there is a positive pressure signal
(P1) variable in a directly proportional manner to the amount
of air taken in by the fan (5) and which is detected by a pressure
point connected to the pneumatic gas valve (7).
e electric power supply of the valve main coils causes both
internal shutters to open and allows the passage of gas, whose
outlet pressure is regulated by the same pneumatic valve in a
1:1 ratio to pressure “P1”.
e gas is injected at the entry of the Venturi pipes (3) throu-
gh a nozzle (4), where the premix starts with the combustion
agent air.
e mixture obtained in this way is ignited on the surface
of the cylindrical burner (8) by the discharge of the ignition
electrodes (9).
Gas valve.
e gas valve is equipped with two main coils controlled by
the electric circuit and with a pneumatic unit that modulates
the outlet gas pressure in 1:1 ratio to the pressure (P1) detected
on the inlet of the Venturi pipe.
e calibration of the ratio between the air and gas pressures
are carried out on the valve (o-set) (see gas regulations).
Electric coils (4).
ere are two ON-OFF coils that are powered (24 V DC) by
an integrated P.C.B. when the burner must be ignited.
ey are connected in series and powered by a voltage of 24
V through a connection connector (3).
Pneumatic unit (2).
Allows to vary the outlet pressure in 1:1 ratio with the pressure
(P1) detected at the inlet of the Venturi pipe that is taken back
to the valve using a small silicone pipe (1).
anks to this system, the percentages in the air-gas mixture
are maintained constant at optimal values on the entire range
of modulation, thus guaranteeing a more or less constant
combustion eciency.
e air-gas ratio calibration can be performed using the o-set
adjusting screw (2).
is is necessary only when, after having performed ue
analysis, incorrect combustion parameter values are detected
(see air-gas ratio regulation).
1
2
34

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Fan.
Operates upstream from the combustion chamber and is
positioned under the condensation module.
It is controlled by the integrated P.C.B. with a positive square
wave signal with variable ON-OFF (duty-cycle) ratio.
Its speed is adjusted (from about 1100 to about5100 rpm)
depending on the power requested and is controlled using a
sensor with Hall eect, which detects the number of revs.
e fan withdraws the combustion agent air through a plastic
pipe (1), which contributes to reducing the noise and optimises
burner ignition.
e variation of the air ow rate that is introduced into the
mixing pipe, leads to the change of the pressure signal (P1) at
the inlet of the Venturi pipe and allows the pneumatic valve
to regulate the pressure of the outlet gas.
Venturi.
Ie Venturi pipe (1) is inserted into a sealed pipe, inside which
the combustion agent air and the gas are mixed.
e air is introduced by the fan in the lower area of the pipe,
while the gas exiting the valve is injected by a nozzle (2) in
correspondence with the Venturi pipe inlet (1).
e passage of air in the pipe creates a depression (“Venturi
eect”) which, through the 4 holes (3) present at its base, allow
to “drag” the gas inside and to mix it with the air.
e nozzle (2) has a dierent diameter depending on whether
natural gas or LPG is used as, working with both gases with
more or less constant pressure, its section establishes the correct
gas ow rate.
ere are two pressure points at the ends of the Venturi pipe,
used to detect the inlet (P1) and outlet (P2) signals.
Using two small silicon pipes, these signals are taken respecti-
vely to the pneumatic gas valve, which must regulate the gas
pressure and to the negative pressure point (P2) arranged in
the upper part of the sealed chamber.
Burner.
It is a cylindrical burner (5) made up from 2 concentric sheet
steel sections, appropriately perforated and built using special
steel that is particularly resistant to high temperatures and
corrosion.
It is inserted inside the condensation module, in a sealed
combustion chamber closed by a ange (4) onto which the
burner is xed, which in the meantime guarantees its direct
connection to the air-gas mixing pipe (6).
e premixing, the lack of secondary air and the construction
features of the burner ensure high combustion eciency and
particularly reduced pollutant emissions (see technical data
depending on the model).
e material's high resistance to temperature, allows to work
with a very low ame at a minimum power of:
VICTRIX ZEUS Superior 26 kW I = 4.7 kW (4,042 kcal/h)
(20 % of the nominal output).
VICTRIX ZEUS Superior 32 kW I = 6.9 kW (5,934 kcal/h)
(20 % of the nominal output).
Ignition takes place by means of an integrated P.C.B. that
controls the ignition (7) and detection electrodes (9).
1
1
2
3
6
9
P1
P2
7
8
4
5
AIR
GAS

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Ignition electrodes (7).
ey are controlled by an igniter (activated by the integrated
P.C.B.) that causes an electrical spark between the two electro-
des on which, on contact, the air-gas mixture ignites.
e electrode (8) has no ceramic insulation and is connected
directly to earth (blind electrode).
ey are positioned on the right side of the burner and xed
onto the ange (4) of the same.
Note: If the igniter must be replaced, for correct connection
of the ignition electrodes, follow the lay-out given below
(otherwise no discharge is obtained).
Detection electrode (9).
It is controlled by the integrated P.C.B. and detected burner
ignition.
It also acts as a ue safety device when any air intake problems
or problems with the evacuation of combustion products make
the burner function below minimum output.
In this case the ame block due to no detection by the elec-
trode.
In order to protect the combustion circuit, the same type of
block prevents the module from lling with water when there
is diculty draining condensate (trap blocked, etc).
It is xed onto the left side of the burner ange (4).
Note:In the case of ignition block, check the distances of the
ignition and detection electrodes keeping to the heights stated
in the gure below.
IGNITER DRAWING
1
2
3
6
9
P1
P2
7
8
4
5
AIR
GAS

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Disassembly of combustion circuit main components.
Before disassembling the components, make sure the gas cock
is closed.
Gas nozzle replacement (19).
Loosen the gas pipe (16) in order to access the gas nozzle (19)
positioned at the entry of the Venturi pipe, then replace it with
the gas nozzle that has the suitable diameter for the type of gas
(see gas transformation).
N.B.: on re-assembly of the nozzle (19), pay particular atten-
tion to the correct positioning of the gas gasket.
Important: in the 32 kW model functioning with natural
gas (G20) the gas nozzle (19) is not present and must not be
installed.
Burner disassembly (10).
Loosen the gas pipe (16) and unscrew the two screws (21)
that x the manifold to the fan, then loosen the 6 blind nuts
(15) that block the gas manifold ange to the condensation
module (8). To replace the burner graphite gasket (11) loosen
the 4 screws (24).
N.B.: on re-mounting the burner/manifold unit, pay particular
attention to the correct positioning of the cord packing (23),
gas gasket (25), gas pipe gasket (16) and gasket between fan
ange and gas manifold (13).
Disassembly of the condensation module (8) and ue
hood (1).
Before carrying out the operation drain o all water present
inside the module.
Loosen the tightening bolts on the system ow and return pipes
and of the condensate discharge pipe positioned in the lower
part of the module. Loosen the two screws (7) and (9) that x
the condensation module to the support back using brackets
and sheet steel. Loosen the screws (2) positioned above the ue
hood and push the stub pipe down (4) in a way to release the
ue hood from the ange with sample points.
N.B.: when restoring the connection between the ue hood
and ange with sample points, check the status of the two
ue gaskets (3).
Flue hood disassembly from the condensation module.
Loosen the three nuts (26) that x the ue hood to the rear
of the condensation module (8) and then separate the hood
from the module.
N.B.: when restoring the connection between ue hood and
module, pay particular attention to the correct positioning of
the lip gasket (6) and the containment gasket (5).
Disassembly and replacement of ignition and detection
electrodes.
Loosen the two xing screws on the ignition electrodes unit
(22). Loosen the two xing screws on the detection electrode
(14).
N.B.: when re-mounting the detection electrodes be sure to
remount the gasket correctly. For the detection electrode be
sure to re-mount the OR gasket. For both electrodes scrupu-
lously follow the minimum heights stated in the drawing in
the page at the side.
A
13
9
11
12
7
6
10
14
1
8
16
17
18
19
20
21 22
23 24
15
5
25
2
4
3
9
26
26
26
A
3
7

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Technical Documentation Technical Documentation
Air-gas adjustments.
e calibration of the total premix combustion system, when
necessary, envisions the adjustment of the nominal heat output
and the air-gas ratio (o-set).
e two operations are only normally requested after a gas
transformation, after extraordinary maintenance (replacement
of a component of the air-gas circuit, replacement of the integrated
P.C.B. etc.) or when the appliance is not calibrated.
N.B.: e nominal output must also be adjusted during
the initial check.
Adjustment of nominal and minimum heat
output.
e availability of maximum output is linked to the length of
the intake and exhaust pipes which, increasing, slightly reduces
the amount (ow rate) of inlet air and consequently also la
pressure of the burnt gas.
e boiler is calibrated as per standard for functioning with
a Ø60/100 horizontal concentric kit with length of 1m and
therefore the use of the ue kit with greater head losses requi-
res a check and possible adjustment of the nominal output
according to the table give below.
Below nd the default settings present on the boiler (length
1 m):
VICTRIX ZEUS Superior 26 kW I
SPEED MAX. G20:
5060 (rpm)
GPL:
4400 (rpm)
MIN SPEED G20:
1240 (rpm)
GPL:
1440 (rpm)
MAX. CEN.
HEAT.
G20:
4700 (rpm)
GPL:
4100 (rpm)
MIN. CEN.
HEAT.
G20:
1240 (rpm)
GPL:
1140 (rpm)
VICTRIX ZEUS Superior 32 kW I
SPEED MAX. G20:
4700 (rpm)
GPL:
4200 (rpm)
MIN SPEED G20:
1260 (rpm)
GPL:
1160 (rpm)
MAX. CEN.
HEAT.
G20:
4700 (rpm)
GPL:
4200 (rpm)
MIN. CEN.
HEAT.
G20:
1260 (rpm)
GPL:
1160 (rpm)
e operation must be performed as follows and with respect
to the values stated in the heat output adjustment table:
- connect a dierential manometer to the pressure points P1
(positive point) and P2 (negative point) found in the upper
part of the sealed chamber (in this way the pressure dierence
at the ends of theVenturi pipes (P1-P2) is detected and a pressure
signal is measured that corresponds to the real ow rate of the
air-gas mixture at the burner).
- start the boiler in the chimney sweep phase by pressing key
"C" and then check maximum fan speed (with burner igni-
ted);
- after about 5 minutes check and, if necessary, modify the
maximum number of fan revs. in CH mode and in DHW
mode until a pressure value is obtained (P1-P2) correspon-
ding to the nominal output.
- to modify the maximum number of fan revs. enter the
"Congurations" menu and inside the “BOILER PAR."
item, modify the value of the "MAX VEL" parameter as
stated in the heat output adjustment table, until the pressure
value (P1-P2) corresponding to the maximum heat output
is obtained.
- N.B.: for the 26 kW version, the maximum number of
revs. in CH mode is lower than the absolute maximum
speed.
- to modify the maximum number of fan revs. in CH mode,
enter the "Congurations" menu and inside the "BOILER
PAR." item modify the value of the "MAX CH" parameter
as stated in the heat output adjustment table, until a pressure
value is obtained (P1-P2) that corresponds to the maximum
output in CH mode.
P1
P2

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Regulation of the air-gas ratio (o-set).
e correct regulation of the air-gas ratio (1:1) takes place
in the factory and must be retouched only when carbon
dioxide (CO2) values are detected in the fumes that are
not optimal.
With this scope, during the initial check or following extra-
ordinary maintenance interventions, ue analysis must be
performed at maximum heat output and minimum heat
output, which attests the goodness of the combustion in
reference to the values indicated in the table below:
VICTRIX ZEUS Superior 26 kW I
CO2at nominal output
(central heating)
CO2at minimum output
(central heating)
G 20 9.40% ± 0,2 8.90% ± 0,2
G 30 12.10% ± 0,2 11.80% ± 0,2
G 31 10.70% ± 0,2 10.20% ± 0,2
VICTRIX ZEUS Superior 32 kW I
CO2at nominal output
(central heating)
CO2at minimum output
(central heating)
G 20 9.40% ± 0,2 8.90% ± 0,2
G 30 12.30% ± 0,2 11.90% ± 0,2
G 31 10.50% ± 0,2 10.30% ± 0,2
To carry out the control correctly and, if necessary, regulate
the air-gas ratio, proceed as follows:
VK 8115 gas valve
Calibration of the minimum CO2.
- start the boiler in chimney sweep functioning mode without
withdrawing DHW and adjust the C.H. temperature selec-
tor, present on the control panel, to minimum.
- withdraw the combustion products by inserting the analyser
probe fully home.
- check whether the value of carbon dioxide (CO2) is within
the limits indicated in the table regarding the minimum heat
output (see table);
- if the values are incorrect, take them within the limits by
acting on the o-set adjusting screws (3) of the gas valve.
By turning in a clockwise direction the CO2value decreases,
by turning in an anti-clockwise direction, it increases.
Calibration of the maximum CO2.
- take the C.H. temperature selector, present on the control
panel, to maximum and check the correspondence of the
carbon dioxide (CO2) value measured with that indicated
in the table regarding the nominal heat output (see table).
- if the values are incorrect, take them within the limits by
acting on the gas ow rate adjusting screws (12) of the gas
valve. By turning in a clockwise direction the CO2value
Key:
1 - Gas valve inlet pressure point
2 - Gas valve outlet pressure point
3 - O-Set adjustment screw
12 - Outlet gas ow rate adjuster
decreases, by turning in an anti-clockwise direction, it in-
creases.
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 (methane or LPG).
e transformation consists in the replacement of the gas noz-
zle positioned in correspondence with the inlet of the Venturi
pipe and adjustment of the maximum heat output (see nominal
and minimum heat output regulation).
Finally, check the carbon dioxide value (CO2) at maximum
and minimum power output which must be corrected if
necessary by regulating the o-set signal (see air-gas ration
regulation).