Immergas VICTRIX ZEUS 20 User manual

Page
Victrix Zeus 20/27 Instructions
Instruction Booklet
Eco-friendly wall-hung condensing boilers
with stainless steel storage tank
For Technical assistance, spare parts or service call:
RVR Limited, Kenmare, Co Kerry Tel: [phone], Fax: [phone]
Doc Ref : ALT112/171207
Read these instructions completely before using or installing the
Victrix Zeus 20/2 gas boilers
LEAVE THESE INSTRUCTIONS WITH THE USER
VICTRIX ZEUS 20/27

Page 2
Victrix Zeus 20/27 Instructions
The Victrix Zeus 20/27 boilers are condensing wall hung, room sealed combination boilers incorporating a
54 litre unvented hot water storage cylinder This boiler has the highest efficiency possible for a gas boiler,
ie 4 stars (****) in conformity with European Directive 92/42 EEC
The boiler, providing both central heating and domestic hot water supply, is designed for use with a fully
pumped, sealed and pressurised heating system using Natural Gas or LPG The boiler is supplied for use
with one of these gas types and must be converted before it can be used on another gas A boiler equipped
for natural gas must not be used on LPG or vice versa
The boiler is supplied with a pump, diverter valve, automatic bypass, pressure relief valve, expansion vessel
and pressure gauge fully assembled and tested
As supplied, the boiler will automatically modulate to provide central heating outputs between 4 7 and
23 5kW ( 6 2 to 31 4kW for Victrix Zeus 27 model) The maximum output available for domestic hot water is
23 5 kW (31 4kW for Victrix Zeus 27 model) and provides hot water at temperatures of up to 60°C
I PORTANT
All gas appliances must be installed by a competent and qualified person, in accordance with relevant
clauses of applicable standards and recommendations These include but may not be limited to the the fol-
lowing:-
I S 813 Domestic Gas Installations
I S, 820 Non-Domestic Gas Installations
All relevant Building Regulations
Local Water Bye Laws
IEE Wiring Regulations
Health & Safety legislation
This appliance meets the requirements of IPX4D, ie degree of protection against moisture
Failure to install this appliance correctly could lead to prosecution It is in your own interest and that of
safety to ensure that the law is complied with Manufacturer's instructions must NOT be taken in anyway as
over-riding statutory obligations
Introduction
Boiler Operating Instructions
Using the Boiler
Before lighting, make sure that the system is full of water and that the manometer (9) indicates a pressure
of 1 - 1 2 bar
-Open the gas valve on the gas supply to the boiler
-Turn main switch (5) to Hot Water or Hot Water/Heating
N.B.: With the switch set to the central Heating temperature setting is not active, and the domestic
water temperature is controlled by selector (3) With the switch set to the central heating tempera-
ture is set using selector (2) while selector (3) is used for the domestic hot water Turn the selectors clock-
wise to raise the temperature, anticlockwise to lower it Boiler operation is now automatic
Gaudium Magnum System - When the Gaudium Magnum switch (6) is in the position, the flow rate
possible for domestic hot water is increased when the storage temperature is more than 50°C If the tem-
perature of the stored hot water drops below 41°C, the system is automatically disabled Please see page
14 for further information on operating the boiler

Page 3
Victrix Zeus 20/27 Instructions
PERFOR ANCE: Victrix 20 Victrix 27
Nominal Heat Input Kw 24 0 32 6
Min Heat Input Kw 5 0 6 6
Nominal Heat Output (useful) Kw 23 5 32
Min Heat Output Kw 4 7 6 3
GAS: G20 G30 G31 G20 G30 G31
Nozzle diameter mm 5 0 3 8 3 8 7 0 5 0 5 0
Supply Pressure Mbar 20 29 37 20 29 37
HEATING SYSTEM:
Max Operating Pres of Heating Unit bar 3 3
Max Operating Temp of Heating Unit ºC 90 90
Adjustable Heat Temp (range 1) ºC 25 - 85 25-85
Adjustable Heat Temp (range 2) °C 25 - 45 25-45
Total Volume of expansion vessel l 10 10
Expansion Vessel preloading bar 1 0 1 0
Generator Water Content l 60 60
Available head capacity 1000 l/h kPa 14 7 35 28
Working Heat Output d h w production Kw 23 5 32 0
DHW adjustable temperature ºC 30-60 30-60
Flow Limiting Device l/min 8 12
DHW circuit minimum pressure bar 0 3 0 3
DHW circuit max operating pressure bar 8 8
Continuous service supply capacity with∆30ºC l/min 11 2 15 2
Capacity with ∆T 30ºC (10 mins) l/min 19 3 23 3
Minimum pressure for flow limiting device
rated capacity
bar 1 0 1 0
Full boiler Weight kg 129 128
Empty boiler weight kg 75 74
ELECTRICAL:
Power Connection v/hz 230/50 230/50
Rated Power Input A 0 59 0 90
Installed Electrical Power W 128 205
Power absorbed by circulator W 83 110
Power absorbed by fan W 20 43
Appliance electrical system callout - IPX4D IPX4D
FLUE GASES: G20 G30 G31 G20 G30 G31
Rated power fume mass flow kg/h 39 33 33 51 46 53
Minimum power fume mass flow kg/h 8 7 9 11 10 11
CO2 at nominal output % 9 2 12 5 10 6 9 44 12 2 10 35
CO2 at minimum output % 9 0 11 9 9 7 8 9 11 5 10 0
CO at O% O2 at minimum output ppm 5 6 8 5 5 6
NOx at 0% of 02 at nominal output ppm 36 268 61 37 115 21
NOx at 0% of O2 at minimum output ppm 12 19 14 9 20 12
Temperature of fumes at rated output (50/30) ppm 43 47 45 53 65 54
Temperature of fumes at min output (50/30) ppm 38 46 44 44 45 43
Boiler Dimensions: inimum Clearances for servicing:
Height 900mm Top 200mm
Depth 450mm Bottom 150mm
Width 600mm Side 20mm
Gas Connection ½” Front 600mm
CH Connection ¾”
DHW Connection ½”

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Victrix Zeus 20/27 Instructions
ain Boiler Components
Gas System
Return
System
Flow
DHW
Outlet
1 Intake sockets (A= air)
(F=fumes)
13 System filling cock 25 3-bar safety valve
2 Combustion chamber cover 14 Expansion vessel 26 8-bar safety valve
3 Ignition electrodes 15 Combustion chamber 27 Gaudium Magnum device
4 Detection electrode 16 SS storage tank 316L 28 Boiler emptying cock
5 Heating and limit NTC probe 17 Condensation module 29 Flue hood
6 Venturi duct 18 Fan 30 +ve signal pressure point
7 Air inlet pipe 19 Ignition & detection unit 31 -ve signal pressure point
8 Overheat safety thermostat 20 Max flow limit thermostat 32 Burner
9 Automatic air vent 21 DHW NTC probe 33 Gas valve outlet pres test
10 Circulator 22 Voltage transformer 34 DHW expansion vessel
11 Motorised 3 way valve 23 Water trap (siphon) 35 System emptying cock
12 Gas Valve 24 No water safety flow switch 36 System adjustable bypass
Cold
DHW
Inlet

Page 5
Victrix Zeus 20/27 Instructions
Gas Supply
The meter and supply pipes must be sized to deliver the gas rate and pressure given on page 3 The
boiler requires at least a 22 mm (3/4”) gas supply pipe The complete installation, including the meter, must
be tested for gas soundness and purged as described in IS 813:2002
Electrical Installation
The boiler requires a 220/240 V ~ 50
Hz mains supply, fused at 3 A The
boiler must be earthed. The polar-
ity of the supply must be correct as
otherwise the boiler will not operate
properly
There must only be one common iso-
lator, providing complete electrical
isolation, for the boiler and any
external controls Using PVC
insulated cable not less than 0 75
mm² (24 x 0 2 mm) to BS 6500
Table 16, the boiler should be
connected to a fused three pin plug
and unswitched shuttered socket out-
let (both complying with BS 1363), or
a fused double pole
switch with a contact separation of
at least 3 mm in both poles
Wiring external to the boiler must
be in accordance with the current IEE
Wiring Regulations
Note: External controls connected to the boiler must be of the volt free type and are connected to
terminals 40 and 41 as shown above.
Weather Compensation
A temperature sensor for outdoors is available as an optional accessory for the boiler This should be fitted
in an outdoor location which is not exposed to direct sunlight A north facing wall is a good location
If the optional weather compensation sensor is used, it should be connected to terminals 38 and 39 as
shown above using a two core cable If this cable is routed in close proximity to cables carrying mains volt-
ages, then screened cable should be used Contact RVR for more information
When the sensor is connected, the boiler adapts it’s flow temperature to suit the prevailing weather condi-
tions This results in lower energy usage and enhanced comfort
WARNING ! - Connection of a voltage to any boiler terminals other than the mains
lead will result in destruction of the boiler control panel. The product warranty
does not cover this type of damage.
Clearances and Air Supply
The boiler does not require any air vents for cooling in the room in which it is installed or when installed in a
cupboard or compartment The minimum clearances for servicing must always be maintained Please see
table on page 3 Note: A cupboard or compartment used to enclose the boiler must be designed and con-
structed specifically for the purpose
General Installation Information
Optional Immergas
Remote controller
(CAR)
Replace link with volt free
contact from CH controls
Do not connect 220V!
External weather com-
pensation sensor

Page 6
Victrix Zeus 20/27 Instructions
Flue Systems
When the boiler is installed on an external wall, the standard horizontal concentric 60/100 flue kit will normally
be used to flue the boiler This is shown in the diagram
It is often necessary to install a longer flue system to cater for site conditions There are several different flue
system sizes available for the Victrix Zeus 20/27 boiler
Horizontal concentric kit 60 /100
Install the bend with flange (2) on the central hole of the boiler in-
serting the seal (1) with the round protrusions facing downwards in
contact with boiler flange and tighten using the screws supplied
with the kit
Fit the smooth male end of the 60/100 concentric terminal pipe (3)
until it reaches to the stop on the female end of the bend (2), mak-
ing sure the internal and external sealing rings are fitted; this will
ensure the connection is properly sealed Additional extensions
and bends may be installed if required using the same method
Ensure that all seals are fitted and that the outer and inner pipes
are installed so that all joints are perfectly sealed Ensure that the
terminal is installed the right way up
A lubricant may assist in overcoming the friction of the seals Oils
and conventional greases are not compatible with the EPDM seals
used and should never be used for this purpose Silicone sprays
are compatible with EPDM and may be used Please contact RVR
for more information
A supporting clamp should be installed every three meters The flue system should be slightly inclined so that
any condensate flows towards the boiler This avoids any drips from the external flue terminal
The maximum possible overall length after the first bend (2) is 12.9 straight and horizontal meters. See
the section on extended flue design for more information.
Vertical concentric kit 60 /100
Install the concentric flange (2) on the central hole of the boiler
inserting the seal (1) with the round protrusions facing down-
wards in contact with boiler flange and tighten using the screws
supplied with the kit
Fit the male end (smooth) of the adapter (3) in the female end of
the concentric flange (2) until it reaches the stop on the female
end of the flange, making sure the internal and external sealing
rings are fitted; this will ensure the connection is properly sealed
Additional extensions and bends may be installed if required us-
ing the same method
Installing the flashing- Replace tiles with the aluminium sheet (5),
shaping it to ensure that the rainwater runs off Position the fixed
half-shell (7) on the aluminium tile and insert the intake/exhaust
pipe (6) Fit the male end (6)(smooth) of the 60/100 concentric
terminal up to the stop on the female end of the adapter(3), mak-
ing sure that the ring (4) is already fitted; this will ensure hold and
joining of the elements making up the kit
Ensure that all seals are fitted and that the outer and inner pipes
are installed so that all joints are perfectly sealed A lubricant may
assist in overcoming the friction of the seals Oils and conventional greases are not compatible with the EPDM
seals used and should never be used for this purpose Silicone sprays are compatible with EPDM and may be
used Please contact RVR for more information
A supporting clamp should be installed every three meters
The maximum possible overall length including the terminal is 13.4 straight and horizontal meters.
NB: If the terminal or extension pipes need shortening ensure that the inner pipe protrudes by 5mm with
respect to the external pipe.

Page 7
Victrix Zeus 20/27 Instructions
Separated 80/80 flue kit
This kit enables separation of the exhaust and air intake
pipes as shown in the figure
Combustion products are expelled from pipe (A) (in
plastic material resistant to acidic condensates) Air is
taken in through pipe (B) (also in plastic material) for
combustion
Intake pipe (B) can be installed either on the right or left
hand side of the central exhaust pipe (B) Both pipes
can be oriented in any direction
Ass mbly:
Install the flange (4) on the central hole of the boiler in-
serting the seal (1), positioning it with the round protru-
sions downwards in contact with the boiler flange and
tighten using the screws supplied with the kit
Remove the sealing plate from the air intake and re-
place it with flange (3)inserting seal (2) which is already
fitted on the boiler and tighten using the screws sup-
plied
Insert bends (5) with the male end (smooth) in the fe-
male end of the flanges (3&4) Fit the male end of the
intake terminal (6) up to the stop on the female end of
the bend (5), making sure that the relevant internal and
external sealing rings are fitted Fit the male of the ex-
haust pipe up to the stop on the female end of the bend,
making sure that the internal sealing ring is fitted; this
will ensure a seal and joining of the elements making up
the kit
Separated Flue Systems
A lubricant may assist in overcoming the friction of the seals Oils and conventional greases are not com-
patible with the EPDM seals used and should never be used for this purpose Silicone sprays are compati-
ble with EPDM and may be used Please contact RVR for more information
A supporting clamp should be installed every three meters The flue system should be slightly inclined so
that any condensate flows towards the boiler This avoids any drips from the external flue terminal
The maximum possible overall length without any bends is 36 straight, horizontal meters or 41
straight, vertical meters regardless of whether they are used in intake or exhaust. See the section
on extended flue design for more information.

Page 8
Victrix Zeus 20/27 Instructions
Each component of the air inlet/flue system has a resistance factor These are given in the following tables
The resistance factor varies depending on whether the component in question conveys fresh inlet air or hot
combustion gases All boilers have a maximum resistance factor of 100 The sum of all components in the
flue system must not exceed the maximum overall resistance factor of 100
Flue calculations for more complex systems

Page 9
Victrix Zeus 20/27 Instructions
Example:
Flue system consists of 9m of 80mm air intake pipe with 3 x 90˚ bends and 6m of exhaust pipe with 2 x 90˚
bends
Component Resistances:
Component Resistance Quantity Total
80mm Intake pipe 0 87 9 7 83
90˚ air intake bend 1 9 3 5 7
80mm Flue pipe 1 2 6 7 2
90˚ Flue bend 2 6 2 5 2
25 93
Total Flue Resistance
In this case the total resistance of the
system is less than 100 The flue de-
sign is acceptable

Page 10
Victrix Zeus 20/27 Instructions
Terminal Position in. Distance
A Directly below an opening, air brick, windows, etc
B Below gutters, soil pipes or drain pipes
C Below eaves
D Below balconies or car port roof
E From a vertical drain pipe of soil pipe
F From an internal or external corner
G Above ground, roof or balcony level
H From a surface facing the terminal
I From a terminal facing a terminal
J From an opening in the car port (door, window) into dwelling
K Vertically from a terminal on the same wall
L Horizontally from a terminal on the same wall
M Horizontally from an opening, air brick, window etc
Below horizontally hinged windows where exhaust is directed upwards
Below horizontally hinged windows where exhaust is not directed upwards
300 mm
75mm
75mm
75mm
75mm
75mm
300mm
600mm
1200mm
1200mm
1500mm
300mm
300mm
3000mm
1000mm
The flue terminal must be exposed to the external air and the position must allow the free passage of air
across it at all times In certain weather conditions the terminal may emit a plume of steam Avoid position-
ing the terminal where this may cause a nuisance If the terminal is fitted within 850 mm of a plastic or
painted gutter or 450 mm of painted eaves or 300 mm of a plastic car port roof, an aluminium shield at least
1 m long should be fitted to the underside of the gutter or painted surface If the terminal is fitted less than 2
m above a surface to which people have access, the terminal must be protected by a terminal guard
I PORTANT— Failure to install flue systems correctly may lead to serious injury or death. Ensure
that:
• Only flues specifically designed for condensing boilers and provided by RVR Energy Technology
Limited are used
• The flue slopes slightly towards the boiler by between 1 and 2 degrees to ensure any condensate
flows towards the boiler Failure to do this will result in condensate dripping from the flue terminal
• The flue is adequately supported along it’s length so that it is straight and cannot be moved without
using a tool
• The flue system has no low points where condensate can collect
• All flue terminals are securely fixed
• No chemicals, detergents, solvents or liquids of any kind are used in the assembly of the flue system
Talc may be used as a lubricant where necessary
• All joints and connections are properly assembled to prevent leakage and all seals are properly
seated
• The flue is thoroughly tested for leaks after installation

Page 11
Victrix Zeus 20/27 Instructions
Boiler Location
The boiler is not suitable for external installation
The boiler must be installed on a flat vertical wall which is capable of supporting the weight of the boiler
The boiler can be fitted to or adjacent to a wall comprising of a combustible material without the need for a
special thermal insulation barrier
The boiler may be installed in any room or internal space, although particular attention is drawn to the re-
quirements of the current IEE Wiring Regulations Where a room sealed boiler is installed in a room con-
taining a bath or shower, it must not be possible for a person using the bath or shower to touch any electri-
cal switch or boiler control utilising mains electricity
The boiler may be installed in a cupboard or compartment, provided it is correctly designed for that pur-
pose
NB: Adequate clearances are required to allow servicing of the boiler. Please see page 3.

Page 12
Victrix Zeus 20/27 Instructions
The boiler is designed for use in a sealed central heating system The system should be designed to oper-
ate with flow temperatures of up to 80°C When designing the system, the pump head, expansion vessel
size, mean radiator temperature, etc must be taken into account
The pressure losses in the system must be compatible with the boiler circulation pump See pump perform-
ance graph below:
Central Heating System
System volume - The 10 litre expansion vessel incorporated into the boiler is pre-charged to 1 0 bar and is
suitable for a sealed heating system with a maximum water content of 100 litres Above 100 litres, consid-
eration should be given to fitting an additional expansion vessel To check correct operation of the expan-
sion vessel(s) the system pressure should not be more than 2 5 bar when the system is at maximum operat-
ing temperature
The boiler is supplied with the following components built in:-
Central Heating Pressure relief valve - complying with BS 6759 and set to operate at 3 bar The discharge
pipe must be routed clear of the boiler to a drain, so that it can be seen, but cannot cause injury to persons
or property
A Pressure gauge is included to indicate the pressure of the central heating system
Pump performance curves
Flow—Head Graph:
The pump head depends on how the system bypass is adjusted
A Head available at max pump speed with by-pass closed (adjustment screw fully screwed in)
B Head available at max pump speed (screw tightened 4 to 5 turns - bypass partially open)
C Head available at max pump speed with by-pass open (adjustment screw fully unscrewed)
Victrix 27 Victrix 20

Page 13
Victrix Zeus 20/27 Instructions
The most important components of the system are shown in the diagram below
• The cold water supply for the water heating side of the system may come from a booster pump or the
cold water mains where this is permitted by the local authority
• A non-return valve must be installed on the cold feed to the boiler This prevents expanding hot wa-
ter back-feeding into the cold side of the system
• The boiler includes an automatic bypass It is not necessary to make any further provision for system
bypasses
• The boiler condensate outlet must be connected to a drain Metal pipes must not be used for this
purpose as the slightly acidic condensate will lead to rapid corrosion Plastic must be used for this
purpose
Filling the central heating system
The system design pressure (cold) should be set to 1 0 bar This pressure is equivalent to a static head of
10 2 metres of water Provision should be made to replace water lost from the system This can be by
manual or automatic means
Filling of the system must be carried out in a manner approved by the local authority Where allowed, the
system may be filled via a temporary connection as shown below or by using the integrated filling valve in
the boiler After filling, always disconnect the flexible hose of the filling loop if used and close the filling
valve in the boiler
All fittings used in the system must be able to withstand pressures up to 3 bar Drain taps (to BS 2879)
must be used to allow the system to be completely drained The heating system should be thoroughly
flushed before the boiler is connected and again after the first heating If it is necessary to add inhibitor to
the central heating system, contact RVR Ltd for guidance

Page 14
Victrix Zeus 20/27 Instructions
Mains water pressurised unvented system are generally not permitted in Ireland A cold water storage tank
and a pressure boosting pump will normally provide a pressurised cold water supply The pressurisation
pump should provide a water pressure of between 1 and 3 bar However, all taps and mixing valves used
with the hot water system must be suitable for operating at a pressure of up to 5 5 bar The use of fittings
designed for open, low pressure systems should be avoided as this will lead to excessive water flow rates
To ensure economic use, the pipe runs between the boiler and taps should be in 15 mm copper pipe and be
as short as possible Where possible the pipe work should be insulated to reduce heat loss
Before the cold water supply pipe is connected to the boiler, it should be thoroughly flushed out to avoid the
danger of dirt or foreign matter entering the boiler
The stored water temperature is adjustable to a maximum of 55°C In hard water areas this should avoid
possible scale build-up However, if descaling is necessary contact RVR Limited for guidance
Unvented Hot Water Storage System
The installation is subject to Building Regulations and the Water Bye Laws of the Local Authority
The Victrix Zeus 20/27 boiler is supplied with all the components required for a safe and efficient unvented
hot water system An air cushion which is present at the top of the 54l storage vessel provides some of the
expansion for the domestic hot water system The balance is provided by the additional DHW expansion
vessel installed within the boiler casing
NOTE: In the Dublin City Council area, the council requires that the minimum internal diameter of
pipes connected to the boiler DHW connections should not be less that 13mm. As 1/2” thermoplas-
tic pipe does not provide the minimum diameter, the minimum suitable thermoplastic pipe size is
3/4”
Discharge pipe - The discharge pipes from the expansion relief valves must be routed to a tundish in
1/2” (or 15 mm )pipe The discharge pipe work from both relief valves may be joined together in the same
sized pipe, providing at least 3/4” (or 22 mm) pipe work is connected downstream of the tundish
Tundish - The tundish must be positioned within 500 mm of the appliance, so that it is visible to the User
and away from electrical devices The minimum size of the discharge pipe downstream of the tundish is
given in the following table
Domestic Hot Water System
15mm (1/2”)
22mm (3/4”)
28mm (1”)
35mm (11/4”)

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Victrix Zeus 20/27 Instructions
The discharge pipework from the tundish:-
1 Shall fall continuously through its length
2 Shall be of a heat resistant material, e g metal
3 Shall not be fitted with any valves or taps
4 Shall discharge to a safe visible position, e g onto the surface of an external wall or into a gulley
5 Shall have a minimum of 300 mm straight pipework directly from the tundish
Note: Where children may play or otherwise come into contact with discharges, a wire cage or similar
guard must be positioned to prevent contact whilst maintaining visibility
Please see the diagrams below for suggested methods of terminating the discharge pipe safely Where a
single pipe serves a number of discharges, such as in blocks of flats, the number served should be limited
to not more than 6 systems so that any installation can be traced reasonably easily The single common
discharge pipe should be at least one pipe size larger than the largest individual discharge pipe to be con-
nected If the system is installed where discharges from safety devices may not be apparent, i e in dwell-
ings occupied by blind, infirm or disabled people, consideration should be given to the installation of an
electronically operated device to warn when discharge takes place
High Level Termination
At high level, discharge onto a roof is acceptable pro-
viding the roof is capable of withstanding high tem-
peratures and there is a distance of 3 m from any
plastic guttering systems that would collect such dis-
charge
Example:-
The example below is for a G½ temperature relief valve with a
discharge pipe (D2) having four elbows and a length of 7 m from the
tundish to the point of discharge
From Table :-
Maximum resistance allowed for a straight length of 22 mm copper discharge pipe (D2) from a G½ tempera-
ture relief valve is 9 m Subtract the resistance for four 22 mm elbows of 0 8 m each = 3 2 m Therefore the
maximum permitted length equates to 9 - 3 2 = 5 8 m
5 8 m is less than the actual length of 7 m therefore calculate the next largest size
Maximum resistance allowed for a straight length of 28 mm pipe (D2) from a G½ temperature relief valve
equates to 18 m
Subtract the resistance for four 28 mm elbows at 1 0 m each = 4 m
Therefore the maximum permitted length equates to 18 - 4 = 14 m
As the actual length is 7 m, a 28 mm (D2) copper pipe will be satisfactory
Tundish installation

Page 16
Victrix Zeus 20/27 Instructions
An annual maintenance of the boiler and heating system is recommended This ensures that the optimal
safety, performance and operation characteristics of the boiler remain unchanged over time
Warnings
Never expose the wall-mounted boiler to direct vapours from a cooking surface Use of the boiler by un-
skilled persons or children is strictly prohibited
Never touch the flue extraction terminal (if fitted) due to the risk of burning caused by high temperatures;
For safety purposes, check that the concentric air intake/flue exhaust terminal (if fitted), is not blocked If
temporary shutdown of the boiler is required, proceed as follows:
a) drain the heating system if anti-freeze is not used;
b) shut off all electrical, water and gas supplies
When building or renovation work is carried out in the vicinity of the flue outlet, switch off the boiler and on
completion of work ensure that a qualified technician checks the safety of the installation Never clean the
appliance or connected parts with flammable substances Never leave containers or flammable substances
in the same environment as the appliance
Electrical Safety
- never touch the appliance with wet hands or other parts of the body and never touch when barefoot
- never pull electrical cables or leave the appliance exposed to atmospheric agents (rain, sunlight, etc );
- the appliance power supply cable must never be replaced by the user;
- in the event of damage to the cable, switch off the appliance and contact a qualified service technician
- in the event of prolonged periods when the boiler is not in use, turn off the main power switch
Operation and aintenance Instructions
Using the Boiler
Before lighting, make sure that the system is full of water and that the manometer (9) indicates a pressure
of 1 - 1 2 bar
-Open the gas valve on the gas supply to the boiler
-Turn main switch (5) to Hot Water or Hot Water/Heating
N.B.: With the switch set to the central Heating temperature setting is not active, and the domestic
water temperature is controlled by selector (3) With the switch set to the central heating tempera-
ture is set using selector (2) while selector (3) is used for the domestic hot water Turn the selectors clock-
wise to raise the temperature, anticlockwise to lower it Boiler operation is now automatic
Gaudium Magnum System - When the Gaudium Magnum switch (6) is in the position, the flow rate
possible for domestic hot water is increased when the storage temperature is more than 50°C If the tem-
perature of the stored hot water drops below 41°C, the system is automatically disabled Please see page
14 for further information on operating the boiler
Antifreeze functions:
The boiler is equipped with an anti-freeze system in both central heating and hot water modes:
When the temperature measured in the central heating system falls below 4 C, the boiler is automatically
fired until a boiler temperature of 35ºC is achieved
When the temperature measured in the hot water tank falls below 4 C, the boiler is automatically fired until
a boiler temperature of 8ºC is achieved

Page 17
Victrix Zeus 20/27 Instructions
DL1 - Green LED that comes on when the boiler is operating in heating or antifreeze mode
DL2 - Green LED that comes on when the boiler is working in domestic hot water mode
DL3 - Orange LED that comes on when the burner is operating
LCD Display unit
Depending on conditions, the LCD display indicates:
- The boiler supply temperature
- The value set during heating and DHW temperature adjustment (for a time of 5 seconds after setting the
temperature using the selector switch)
- the wording EC (external controls) with the optional CAR remote control is used
- Fault conditions, the code number corresponding to the fault is displayed:
01 = Lockout due to ignition failure
02 = Lockout due to overheat thermostat triggering
05 = breakage of heating NTC sensor (NR)
10 = no-water safety device
12 = NTC DHW sensor failure (storage tank)
14 = incorrect ignition unit and board connection / faulty ignition unit
16 = fan failure (faulty fan)
17 = incorrect fan speed
26 = no-water safety switch closed with pump not working
31 = incompatible remote control
Reset Button
The Reset button is used to reset certain faults A reset will occur when the button is pressed
Operation and aintenance Instructions
Boiler display and indicators

Page 18
Victrix Zeus 20/27 Instructions
aintenance Operations:
Lack of wate in boile .
Not enough water pressure detected in the heating circuit to guarantee correct boiler operation Make sure
that the pressure in the system is between 1and1 2 bar N B Close the valve on completion If pressure
valves reach around 3 bar the safety valve may be activated In this case contact a professional technician
for assistance In the event of frequent pressure drops, contact qualified personnel for assistance to elimi-
nate system leakage
System flow NTC senso fault.
If the unit detects a problem with the system delivery NTC sensor, the boiler will not start; call a qualified
technician
Domestic ci cuit NTC senso fault.
If the unit detects a problem in the domestic circuit NTC sensor, the boiler will not produce domestic hot
water; call a qualified technician
No wate ci culating.
This occurs if there is overheating in the boiler due to insufficient water circulation through the boiler - check
that no shutoff devices are closed and that the system is free of air Check that the circulating pump is run-
ning freely If necessary, remove the pump cover screw and manually rotate the pump impellor using a flat
bladed screwdriver If lockout occurs repeatedly, contact a qualified technician for assistance
D aining the system.
To drain the boiler, use the special drain cock Before draining, ensure that the filling valve is not connected
closed
D aining the boile .
To drain the boiler, use the special drain cock N B : Before carrying out this operation, close the boiler cold
water inlet cock and open any domestic circuit hot water cock to allow air to enter the boiler
Anti-f eeze p otection.
The boiler comes standard with an anti-freeze function that starts the pump and burner when the water tem-
perature inside the boiler falls below 4°C and stops on exceeding 35°C The anti-freeze function is guaran-
teed if the boiler is fully operative and not in “lockout” status, and is electrically connected with the main
switch set to Summer or Winter To avoid continued operation in the event of prolonged absence, the sys-
tem must be drained completely or anti-freeze substances should be added to the heating system water In
both cases the boiler domestic water circuit must be drained In appliances subject to frequent draining, the
system must be refilled with suitably treated water to eliminate hardness that may cause lime scale forma-
tion
Decommissioning:
In the event of permanent shutdown
of the boiler, contact professional
personnel for the procedures and
ensure that the electrical, water and
gas supply lines are shut off and
disconnected
Casing Cleaning:
Use damps cloths and neutral
detergent to clean the boiler
casing. Never use abrasive or
powder detergents.

Page 19
Victrix Zeus 20/27 Instructions
The following checks and maintenance should be performed at least once a year
- Clean the flue side of the heat exchanger
- Clean the main burner
- Make a visual inspection of the flue extraction hood for wear or corrosion
- Ensure correct ignition and operation
- Ensure correct settings of the burner in domestic water and heating modes
- Verify correct operation and adjustment of the boiler, in particular:
- operation of the electrical main switch on the boiler;
- operation of the system control thermostat;
- operation of the domestic water control thermostat
- Ensure gas soundness of the gas intake circuit; insert a “U” or digital type pressure gauge in the pressure
test point upstream of the gas valve and then close the boiler shutoff valve No pressure variation must
occur in the next five minutes on the gauge
- Ensure activation of the device for protection against the ionisation flame control gas; activation time must
be less than ten seconds
- Visually inspect to check for leakage of water or oxidation of fittings
- Check visually that the water safety valve outlets are not blocked and that the tundish is clear
- Check that the charge of the expansion vessel after discharging system pressure to the zero setting
(check via boiler pressure gauge), is at 1,0 bar
- Check that the system static pressure (in cold conditions and after system recharging via the filling valve )
is between 1 and 1 2 bar
- Check visually that the safety and control devices have not been tampered with and/or shorted, in particu-
lar:
- temperature safety thermostat;
- air pressure switch
- Check the integrity of boiler Magnesium Anode
- Ensure correct maintenance and condition of the electrical installation with particular reference to:
electrical cables must be correctly routed
no traces of black marking or burns
Annual maintenance procedures

Page 20
Victrix Zeus 20/27 Instructions
N B : Pressure values specified in the table indicate the difference of pressure values between the gas
valve outlet and the combustion chamber Adjustments are carried out using a differential pressure
gauge
Variable Heat Output:
Victrix 20:
Victrix 27: