Immergas VICTRIX Zeus 26 1 I User manual

VICTRIX Zeus 26 1 I
Condensation-type wall-hung room
sealed fan-assisted boiler with
stainless steel storage tank
VICTRIX Zeus 26 1 I

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VICTRIX Zeus 26 1 I
Wall-mounted, fan-assisted condensing boiler
with domestic hot water storage tank
VICTRIX Zeus 26 1 I
VICTRIX Zeus 26 1 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 26 1 I range is type-approved for installa-
tion 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 23,6 kW
(20.296 kW in DHW mode) in CH mode and 26 kW (22.360
kcal/h) which, thanks to condensing technology, distinguishes
itself due to its high eciency and large eld of modulation
(from 12 % 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.
e regulation and control are entrusted to a P.C.B. with inte-
grated microprocessor with continuous ame modulation via 2
sensors (DHW and CH), which through a backlit display shows
the functioning state of the boiler (temperatures, safety devices,
etc.) and allows the connection (optional) to the Comando
Amico Remoto remote control, which allows to manage and
control the boiler at a distance easily, to the external probe, to
the relay interface (for coupling to any valves), to the control
unit for area systems and to the Multi-system Distribution
Manifold.
General features.
e boiler has 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 a 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 VICTRIX Zeus 26 1 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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Main dimensions ad VICTRIX Zeus 1 I connections
Key:
V - Electrical 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
N.B.: Connection group (Optional)
Height (mm) Width (mm) Depth (mm)
890 580 380
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 1I control panel
Key:
1 - Boiler status signal display
2 - Stand-by-Domestic water / Remote Control - Domestic water and Heating-Reset Selector
3 - Domestic hot water temperature selector
4 - Central heating temperature selector
5 - Boiler manometer

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VICTRIX Zeus 1I main components
Key:
1 - System lling valve
2 - Condensate drain trap
3 - Gas valve
4 - /way valve (motorised)
5 - 3 bar safety valve
6 - System pressure switch
7 - Boiler pump
8 - Vent valve
9 - Fan
10 - Gas nozzles
11 - Venturi
12 - Detection electrode
13 - Condensation module
14 - Flue safety thermostat
15 - Air intake pipe
16 - Sample points (air A) - (ue gas F)
17 - Negative signal pressure point
18 - Burner
19 - Positive signal pressure point
20 - Manual air vent valve
21 - Ignition electrode
22 - System expansion vessel
23 - Delivery probe
24 - Safety thermostat
25 - Control panel
26 - Domestic hot water probe
27 - Stainless steel storage tank
28 - V8 bar safety valve
29 - Storage tank unit draining valve
30 - System draining valve
N.B.: Connection group (Optional)

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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 1I 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 - Delivery probe
20 - Safety thermostat
21 - Burner
22 - Ignition electrodes
23 - Condensation module cover
24 - Venturi negative sign (P2)
25 - Venturi positive sign (P2)
26 - System expansion vessel
27 - Boiler pump
28 - Adjustable by-pass
29 - System pressure switch
30 - System draining valve
31 - ree-way valve (motorised)
32 - Domestic hot water probe
33 - 3 bar safety valve
34 - System lling valve
35 - 8 bar safety valve
36 - Cold water inlet non-return valve
37 - Storage tank unit draining valve
G - Gas supply
SC - Condensate drain (minimum internal
diameter 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 (27). 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
A = Head available to the plant at third speed (with by-pass excluded)
B = Head available to the plant at third speed (with by-pass inserted)
C = Head available to the plant at second speed (with by-pass excluded)
D = Head available to the plant at second speed (with by-pass inserted)
Head (m c.a.)
VICTRIX Zeus 1I
Head (kPa)
Flow rate Litres/h
A
C
(31), 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.
B
D

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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.
ere is a seat on the body where the automatic air vent valve
(2) is housed.
Primary heat exchanger
(condensation module).
It is formed from a casing that contains 4 elements with a
coil shape.
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).
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).
PTo 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.
e 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).
FLUE GAS
RETURN
FLOW
EXHAUST
CONDENSATE
2
1
4
35
1
2

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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 (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).
Return
coil
storage tank
Flow
Pump
Return
system
RETURN
PUMP
RETURN
SYSTEM
RETURN
COIL

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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.
Flow
System
8
46
3

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GIM Multifunction Integrated Unit
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 locking clip out (2)
and extract the small electric motor (3) and then unscrew the
screw fasteners (4) that x the cartridge (1) to the composite
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 locking clip must be
removed and the valve extracted (9) paying attention not to
damage the relative O-ring.
N.B.: when re-mounting the air vent valve, pay particular
attention to insert the relative O-ring 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 locking
clip out.
N.B.: when re-mounting the 3 bar valve, pay particular atten-
tion to insert the relative O-ring correctly.
System pressure switch replacement.
To replace the system pressure switch (14), slide the relevant
locking clips out.
N.B.: when re-mounting the system pressure switch, pay par-
ticular attention to insert the relative O-ring correctly.
3
2
1
45
9
8
14
13
11
7
6
12
10
15

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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 45 litre stainless steel storage tank with coil and totally
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 appropriate 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(circulator) 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:
- one lter, one 10 l/min ow limiter 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.
DHW expansion vessel (11) (optional).
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 2.5 bar.
11
9
10
12
4
2
1
13
Inlet
cold
water
Output
hot
water
Coil
ow
Return
coil

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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).
2
4
3
1

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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 about 5100 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.
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 3.0 kW (2.580
kcal/h) (10 % of the nominal output).
Ignition takes place by means of an integrated P.C.B. that
controls the ignition (7) and detection electrodes (9).
AIR
GAS
1
1
2
3
6
9
P1
P2
7
8
4
5

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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
AIR
GAS
1
2
3
6
9
P1
P2
7
8
4
5

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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.
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 gasket in graphite (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 (13), gas pipe gasket (25) and gasket between fan
ange and gas manifold (18).
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.: on re-mounting the ignition electrodes, make sure that
the gasket is also re-mounted correctly. For the detection elec-
trode check re-mounting of the O-ring. For both electrodes
scrupulously follow the minimum heights stated in the drawing
in the page at the side.
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
A

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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.
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).
- enter the calibration function by positioning the DHW regu-
lation selector switch on notch N° 6 and the CH regulation
selector switch on notch N° 9.
- turn the main selector switch to the Reset position for 15
seconds and then release it when "Id" (identication) appears
on the boiler display.
- once the calibration menu has been entered, the display
will show the DHW symbol and the ame with ashing
maximum power scale.
N.B.: If identication does not take place within 15 secon-
ds, the boiler will go into Stand-by and the error code E08
equivalent to "Reset selector switch fault" will be displayed.
To restore the appliance, turn the main selector switch to the
(Stand-by) . position.
- at this point the maximum power can be changed in DHW
mode by operating on the DHW regulation selector switch
regulating the fan speed until the pressure value is obtained
(P1-P2), which corresponds to the nominal output (notch
N° 9 corresponds to the maximum speed= 6000 revs, notch
N° 0 corresponds to the minimum speed = 4500 revs). During
regulation the display shows the speed of the fan in hundreds
of revs per minute.
- to conrm the parameter set, position the main selector
switch on Reset for 2 seconds.
N.B.: During the regulation of the maximum power in DHW
mode, the CH selector switch must be positioned at notch
N° 9.
- after having set the maximum power in DHW mode, the
minimum power can be set (DHW and CH) by operating
on the DHW regulation selector switch adjusting the fan
speed from 960 to 1200 revs until obtaining a pressure
value (P1-P2) corresponding to the minimum power (notch
N° 9 corresponds to the maximum speed = = 1200 revs, notch
Domestic
hot water
Central
heating
Domestic hot water
regulation of the nominal
maximum speed
Central heating
position on
notch 9
P1
P2

18
STVZ1I ed 10/09 VICTRIX Zeus 1 I
Technical DocumentationTechnical Documentation
N° 0 corresponds to the minimum speed = 960 revs). During
regulation the display shows the speed of the fan in hundreds
of revs per minute.
- to conrm the parameter set, position the main selector
switch on Reset for 2 seconds.
N.B.: During the regulation of the minimum power, the CH
selector switch must be positioned at notch N° 5.
- after having set the minimum power, the maximum power
must be set in CH mode by operating on the DHW regu-
lation selector switch, the travel of the power regulation in
CH mode varies from maximum to minimum. In this way,
fan speed can be regulated until a pressure value is obtained
(P1-P2) that corresponds to the nominal output in CH mode
(see heat output data). During regulation the display shows
the speed of the fan in hundreds of revs per minute.
- to conrm the parameter set, position the main selector
switch on Reset for 2 seconds.
N.B.: During the regulation of the maximum power in CH
mode, the CH selector switch must be positioned at notch
N° 0.
Important: e output relative to functioning in DHW
mode can be regulated up to a value equal to 26 kW, while
the functioning output in the CH phase must never exceed 24
kW (see technical data referring to the heat output).
- to conrm and memorise the settings made for each in-
dividual regulation (max. DHW, min. DHW/CH and
max. CH) always turn the main selector switch to the
Reset position for at least 2 seconds. e boiler will go into
chimney sweep mode and at this point it is possible to verify
the calibration values with burner on or exit the chimney
sweep function, by taking the main selector switch to the
Stand-by" position .
Domestic hot water
regulation of CH and
DHW minimum speed
Central heating
position on
notch 5
Domestic hot water
regulation of the maxi-
mum CH speed
Central heating
position on
notch 0
N.B.: If the values set are not conrmed, the calibration
values are not modied (the previous ones remain active). e
operation must be repeated from the start in order to modify
the values.
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 ue gases 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:
CO2at nominal output
(central heating)
CO2at minimum output
(central heating)
G 20 9,50% ± 0,2 9,00% ± 0,2
G 30 12,30% ± 0,2 11,80% ± 0,2
G 31 10,60% ± 0,2 10,20% ± 0,2
Important: the verication operations of the CO2must be
carried out with the casing mounted, while the gas valve cali-
bration operations must be carried out with the casing open.