Immergas VICTRIX 50 Product manual

VICTRIX 50
Instruction and
warning booklet IE
*1.034454IE*

Immergas S.p.A. declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and commercial
documents without forewarning.
CE DECLARATION OF CONFORMITY
Under the "Gas Appliances" Directive 2009/142/EC, "Electromagnetic Compatibility (EMC)" Directive 2004/108/EC, "Boiler Eciency" Directive
92/42/EC and "Low Voltage" Directive 2006/95/EC.
e Manufacturer: Immergas S.p.A. v. Cisa Ligure n° 95 42041 Brescello (RE)
DECLARES THAT: the Immergas boiler model:
Victrix 50
is in compliance with the same European Community Directives
Mauro Guareschi
Research & Development Director
Signature:
Dear Client,
Our compliments for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Immergas customer
you can also count on a qualied aer-sales service, prepared and updated to guarantee constant eciency of your boiler. Read the following pages carefully: you
will be able to draw useful suggestions regarding the correct use of the appliance, the respect of which, will conrm your satisfaction for the Immergas product.
Contact our area authorised aer-sales centre as soon as possible to request commissioning. Our technician will verify the correct functioning conditions; he
will perform the necessary calibrations and will demonstrate the correct use of the generator.
For any interventions or routine maintenance contact Immergas Authorised Centres: these have original spare parts and boast of specic preparation directly
from the manufacturer.
General recommendations
All Immergas products are protected with suitable transport packaging.
e material must be stored in dry environments protected against bad weather.
e instruction book is an integral and essential part of the product and must be consigned to the new user also in the case of transfer or succession of ownership.
It must be stored with care and consulted carefully, as all of the warnings provide important safety indications for installation, use and maintenance stages.
is instruction manual provides technical information for installing the Immergas kit. As for the other issues related to the kit installation (e.g.: safety in
worksites, environment protection, injuries prevention), comply with the provisions specied in the current regulation and technical standards.
In compliance with legislation in force, the systems must be designed by qualied professionals, within the dimensional limits established by the Law. Installation
and maintenance must be performed in compliance with the regulations in force, according to the manufacturer's instructions and by professionally qualied
sta, intending sta with specic technical skills in the plant sector, as envisioned by the Law.
Improper installation or assembly of the Immergas appliance and/or components, accessories, kit and devices can cause unexpected problem to persons, animals
and objects. Read the instructions provided with the product carefully to ensure a proper installation.
Maintenance must be carried out by skilled technical sta. e Immergas Authorised Aer-sales Service represents a guarantee of qualications and
professionalism.
e appliance must only be destined for the use for which it has been expressly declared. Any other use will be considered improper and therefore potentially
dangerous.
If errors occur during installation, operation and maintenance, due to non compliance with technical laws in force, standards or instructions contained in this
book (or however supplied by the manufacturer), the manufacturer is excluded from any contractual and extra-contractual liability for any damages and the
appliance warranty is invalidated.
For further information regarding legislative and statutory provisions relative to the installation of gas heat generators, consult the Immergas site at the
following address: www.immergas.com

INDEX
USER pageINSTALLER page MAINTENANCE TECHNICIAN page
1 Boiler installation .......................................5
1.1 Installation recommendations. ................. 5
1.2 Position of the appliances. ........................5
1.3 Aeration and Ventilation of the
installation rooms. .....................................5
1.4 Outdoor installation. .................................6
1.5 Anti-freeze protection................................6
1.6 Main dimensions. .......................................6
1.7 Attachments. ...............................................7
1.8 Commands for heat adjustment
(Optional). ..................................................8
1.9 Installation of the air intake and ue
exhaust terminals........................................ 9
1.10Boiler installation in type “C”
conguration. ............................................11
1.11Boiler installation in type “B23”
conguration. ............................................12
1.12Ducting of existing ues. .........................13
1.13Flue exhaust with boilers in cascade. .....14
1.14System lling. ............................................14
1.15Filling the condensate trap. .....................14
1.16Gas system start-up. .................................15
1.17Boiler start up (ignition)..........................15
1.18Circulation pump......................................15
1.19Kits available on request. .........................15
1.20Boiler components....................................16
1.21Hydraulic diagram con optional.............17
1.22Hydraulic Diagram for No. 2 boilers in
cascade with optional...............................18
1.23Hydraulic Diagram for No. 3 boilers in
cascade with optional...............................18
1.24Installation examples of individual
boiler...........................................................19
1.25Installation examples of boiler in
cascade. ......................................................20
2 Instructions for use and maintenance....21
2.1 Cleaning and maintenance......................21
2.2 Aeration and Ventilation of the
installation rooms.....................................21
2.3 General warnings......................................21
2.4 Control panel.............................................21
2.5 Restore heating system pressure .............23
2.6 Draining the system. ...............................23
2.7 Anti-freeze protection. ............................23
2.8 Case cleaning. ...........................................23
2.9 Decommissioning.....................................23
3 Boiler commissioning (initial check).....24
3.1 Hydraulic Diagram...................................24
3.2 Wiring diagram.........................................25
3.3 Appliance functioning parameters.........26
3.4 Functioning anomalies with manual
rearm. .........................................................27
3.5 Functioning anomalies with electric
rearm. .........................................................28
3.6 Converting the boiler to other
types of gas.................................................29
3.7 Checks following conversion to another
type of gas. .................................................29
3.8 Possible adjustments ................................29
3.9 Adjustment of the air-gas ratio. .............29
3.10Check combustion parameters. ..............29
3.11Regulation of the CH nominal output...29
3.12Regulation of the CH minimum output.29
3.13Regulation of the heat output in
DHW mode...............................................29
3.14Pump operating mode. ............................30
3.15“Chimney sweep function”. .....................30
3.16Pump anti-block function. ......................30
3.17Radiators anti-freeze function. ...............30
3.18Maximum ow temperature value in
central heating mode................................30
3.19Casing removal. ........................................31
3.20Yearly control and maintenance of the
appliance. ...................................................32
3.21Variable heat power. .................................32
3.22Combustion parameters. .........................33
3.23Technical data. ..........................................33

1-1
5 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1BOILER INSTALLATION
1.1 INSTALLATION
RECOMMENDATIONS.
Only professionally qualied heating/plumbing
technicians are authorised to install Immergas
gas appliances.
e “Victrix 50” range boilers can be installed
outdoors or in a suitable room (heating control
unit).
e place of installation of the appliance and
relative Immergas accessories must have suitable
features (technical and structural) such to allow
(always in safety, eciency and easy conditions):
- installation (according to the provisions of
technical legislation and technical regulations);
- maintenance operations (including scheduled,
periodic, routine, special);
- removal (to outdoors in the place for
loading and transporting the appliances
and components) as well as the eventual
replacement of those with appliances and/or
equivalent components.
Attention: these boilers must be used to heat
rooms and the like; they are for heating water
to a temperature lower that boiling point at
atmospheric pressure. erefore, they must be
connected to a heating system that is suitable for
their performance and their power.
Before installing the appliance, ensure that it is
delivered in perfect condition; if in doubt, contact
the supplier immediately.
Packaging materials (staples, nails, plastic bags,
polystyrene foam, etc.) constitute a potential
hazard and must be kept out of the reach of
children.
Keep all flammable objects away from the
appliance (paper, rags, plastic, polystyrene, etc.).
In the event of malfunctions, faults or incorrect
operation, turn the appliance o immediately
and contact a qualified technician (e.g. the
Immergas Technical Aer-Sales Centre, which
has specically trained sta and original spare
parts).
Do not attempt to modify or repair the appliance
alone.
Failure to comply with the above implies personal
responsibility and invalidates the warranty.
• Installation Standards: these boilers have not
been designed to be installed on plinths or
oors (Fig. 1-1), but for wall installation. e
wall surface must be smooth, without any
protrusions or recesses enabling access to the
rear part. Wall mounting of the boiler must
guarantee stable and ecient support for the
boiler. e plugs (standard supply) are to be used
only in conjunction with the mounting brackets
or xing template to x the appliance to the wall;
they only ensure adequate support if inserted
correctly (according to technical standards)
in walls made of solid or semi-hollow brick or
block. In the case of walls made from hollow
brick or block, partitions with limited static
properties, or in any case walls other than
those indicated, a static test must be carried out
to ensure adequate support. e boilers must
be installed in a way to prevent collisions and
tampering.
N.B.: the hex head screws supplied in the blister
pack are to be used exclusively to x the relative
mounting bracket to the wall.
1.2 POSITION OF THE APPLIANCES.
e "Victrix 50" range boilers can be installed:
- outdoors;
- in outdoor environments, also adjoining the
building served, located in uncovered space, as
long a structurally separated and without walls
in common, or situated on the at covering of
the building served, always without walls in
common;
- in buildings also destined for other use or in
places inserted in the volume of the building
served.
ese places must be destined exclusively for
heating plants.
Attention: the installation of appliances powered
with gas with a greater density than 0.8 (L.P.G.)
is only allowed in places out of the ground,
also communicating with places that are on the
ground. In both cases the walkway must not have
hollows or depressions such to create gas pockets
that determine dangerous conditions.
Height of the installation room.
Installation of an individual appliance: the
minimum height of the room must be 2 m.
Installation of several appliances in cascade (2 or
3 Victrix 50): considering the dimensions of the
boiler, of the ue collector (to be installed with
gradient of 3%) and hydraulic collectors, the
minimum height of the room must be 2.30 m.
e above-mentioned heights allow the correct
installation of the appliances.
Position of the appliances in the room.
Individual appliance: the distances between
any external point of the boiler and the vertical
and horizontal walls of the room must allow
accessibility to the regulation, safety and control
elements for routine maintenance.
Several appliances, not connected to each other, but
installed in the same room: the minimum distance
to maintain between several boilers installed
on the same wall must be 200 mm, in order to
allow accessibility to the regulation, safety and
control elements and routine maintenance of all
appliances installed.
Installation in cascade (2 or 3 Victrix 50): see the
indications supplied in par. 1.13.
1.3 AERATION AND VENTILATION OF
THE INSTALLATION ROOMS.
e rooms must have one or more permanent
openings for aeration on external walls. The
openings used for aeration can be protected
using metal grills, meshes and/or rain-proof ns
as long as the net aeration surface is not reduced.
The aeration openings must be realised and
located in a way to prevent the formation
of pockets of gas, independently from the
conformation of the covering.
Aeration for installation in outdoor places. e
minimum free surfaces, in relation to the overall
heat input must not be below:
a) above-ground rooms (S ≥ Q x 10)
S > 510 cm2for No. 1 individual Victrix 50
S > 1,020 cm2for No. 2 Victrix 50 in cascade
S > 1,530 cm2for No. 3 Victrix 50 in cascade
b) basements and underground rooms up to a
height of -5 m from the reference surface (S
≥ Q x 15)
S > 765 cm2for No. 1 individual Victrix 50
S > 1,530 cm2for No. 2 Victrix 50 in cascade
S > 2,290 cm2for No. 3 Victrix 50 in cascade
c) underground rooms at quota between -5 m
and -10 m from the reference surface (S ≥ Q
x 20 with a minimum of 5000 cm2)
S > 5000 cm2for all congurations
In all cases each opening must not have a net
surface area less than 100 cm2.
Attention: in the case of installation of appliances
powered with gas with greater density than 0.8
(L.P.G.) in outdoor places, above-ground, at least
2/3 of the aeration surface must be ush with the
oor, with a minimum height of 0.2 m.
e aeration openings must be at least 2 m for
heating capacities not exceeding 116 kW and
4.5 m for higher heating capacities, cavities,
depressions or openings communicating with
rooms below the walkway surface or draining
ducts.
Aeration for installation in building also
destined for other use or in places inserted in
the volume of the building served. e aeration
surface must not be less than 3000 cm2in the case
of natural gas and must not be less than 5000 cm2
in the case of L.P.G.
YES NO

1-2
6 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
Discharge of combustion products.
e boiler must be connected to an individual
safe and ecient chimney.
N.B.: in the event of individual installation,
“Victrix 50” can be combined with the System
for Ø80 mm flexible piping for condensing
boilers (par. 1.12).
As an alternative, the boiler can discharge
combustion products directly to the outside,
using the relevant ue exhaust kit described in
this book (par. 1.9, 1.10 and 1.11).
If the “Victrix 50” boilers are installed in cascade,
the fume collector (supplied by Immergas) must
be connected to a correctly dimensioned and
ecient chimney (par. 1.13).
1.4 OUTDOOR INSTALLATION.
The boiler has an IPX5D electric insulation
rating and can also be installed outdoors, without
additional protections.
Attention: all optional kits that can be potentially
connected to the boiler must be protected on the
basis of their electrical protection rating.
1.5 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler comes
as standard with an anti-freeze function that
activates the pump and burner when the system
water temperature in the boiler falls below 3°C.
e anti-freeze function is only guaranteed if:
- the boiler is correctly connected to gas and
electricity power supply circuits;
1.6 MAIN DIMENSIONS.
Height (mm) Width (mm) Depth (mm)
950 600 525
Connections
GAS SYSTEM
G R M
3/4” 1”1/2 1”1/2
Key:
V - Electrical connection
G - Gas supply
R - System return
M - System ow
SC - Condensate drain (minimum
internal diameter Ø13 mm)
- the boiler is powered constantly;
- the main switch is engaged;
- the boiler is not in failed ignition block;
- the boiler essential components are not faulty.
In these conditions the boiler is protected against
freezing to an environmental temperature of -5°C.
Minimum temperature -15°C. If the boiler is
installed in a place where the temperature falls
below -5°C and in the event there is no gas (or
the boiler goes into failed ignition block), the
appliance can freeze.
To prevent the risk of freezing follow the
instructions below:
- protects the central heating circuit from
freezing by introducing a top quality anti-freeze
liquid into this circuit, which is not noxious to
health. e instructions of the manufacturer
of this liquid must be followed scrupulously
regarding the percentage necessary with
respect to the minimum temperature at which
the system must be kept. An aqueous solution
must be made with potential pollution class of
water 2.
e materials used for the central heating circuit
of Immergas boilers resist ethylene and propylene
glycol based antifreeze liquids (if the mixtures are
prepared perfectly).
For life and possible disposal, follow the supplier's
instructions.
- Protect the condensate drain trap and P.C.B.
against freezing by using an accessory that is
supplied on request (anti-freeze kit) comprising
two electric resistances, the relevant cables
and a control thermostat (carefully read the
installation instructions contained in the
accessory kit pack).
Boiler anti-freeze protection is thus ensured only if:
- the boiler is correctly connected to the power
supply circuit;
- the main switch is engaged;
- the anti-freezing kit components are ecient.
In these conditions the boiler is protected against
freezing to temperature of -15°C.
The warranty does not cover damage due to
interruption of the electrical power supply and
failure to comply with that stated on the previous
page.

1-3 1-4
1-5
7 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.7 ATTACHMENTS.
Gas connection (Appliance category II2H3B/P).
Our boilers are built to function with methane
gas (G20) and L.P.G. e supply piping must be
the same or greater than the 3/4” G boiler tting.
N.B.: the gas supply pipe must be suitably
dimensioned according to current regulations
in order to guarantee correct gas ow to the
boiler even in conditions of maximum generator
output and to guarantee appliance efficiency
(technical specications). e coupling system
must conform to standards.
Before connecting the gas line, carefully clean
inside all the fuel feed system pipes to remove any
residue that could impair boiler eciency. Also
make sure the gas corresponds to that for which
the boiler is prepared (see boiler data-plate).
If dierent, the appliance must be converted
for operation with the other type of gas (see
converting appliance for other gas types). e
dynamic gas supply (methane or LPG) pressure
must also be checked according to the type used
in the boiler, which must be in compliance, as
insucient levels can reduce generator output
and cause malfunctions.
Ensure correct gas cock connection by following
the mounting instructions (Fig. 1-3).
A manual cut-off valve with quick closure
manoeuvre for 90° rotation and end run stops
in the all open or all closed positions must be
installed on the gas supply pipe in a visible and
easily reachable position outside the room where
the appliance is installed.
N.B.: the internal gas supply system must be
in compliance with the provisions of the local
Laws in force.
Fuel gas quality. The appliance has been
designed to operate with gas free of impurities;
otherwise it is advisable to fit special filters
upstream from the appliance to restore the
purity of the gas.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance casing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
Hydraulic connection.
Important: in order not to void the warranty
before making the boiler connections, carefully
clean the heating system (pipes, radiators, etc.)
with special pickling or descaling products to
remove any deposits that could compromise
correct boiler operation.
A chemical treatment of the thermal system
water is required, in compliance with the
technical standards in force, in order to protect
the system and the appliance from deposits (e.g.,
lime scale), slurry or other hazardous deposits.
It is recommended to prepare a filter in the
system to collect and separate any impurities
present in the system (slurry remover lter). In
order to avoid deposits, scaling and corrosion in
the central heating system, the provisions given
in the regulations on water treatment in heating
systems for civil use must be respected.
Water connections must be made in a rational
way using the couplings on the boiler template.
e discharge of the boiler safety valve must be
connected to a discharge funnel that is present in
the boiler but not installed and then connected
to a sewer. Otherwise, the manufacturer declines
any responsibility in case of ooding if the drain
valve cuts in.
Important: to preserve the duration of appliance
eciency features, we recommend installation of
a suitable device for water treatment in presence of
water whose characteristics can lead to the deposit
of lime scale.
Condensate drain. To drain the condensate
produced by the appliance, it is necessary
to connect to the drainage system by means
of acid condensate resistant pipes having an
internal diameter of at least 13 mm. e system
connecting the appliance to the drainage system
must be carried out in such a way as to prevent
freezing of the liquid contained in it. Before
appliance start-up, ensure that the condensate
can be correctly removed. Also, comply with
national and local regulations on discharging
waste waters.
Electrical connection: The electrical system
must be made in compliance with the local laws
in force. e boiler has an IPX5D protection
rating for the entire appliance. Electrical safety of
the appliance is reached only when it is correctly
connected to an efficient earthing system as
specied by current safety standards.
Attention: Immergas S.p.A. declines any
responsibility for damage or physical injury
caused by failure to connect the boiler to an
ecient earth system or failure to comply with
the reference standards.
Also ensure that the electrical installation
corresponds to maximum absorbed power
specications as shown on the boiler data-plate.
Boilers are supplied complete with an “X” type
power cable without plug. e power supply
cable must be connected to a 230V ±10% /
50Hz mains supply respecting L-N polarity and
earth connection . is network must also
have an omnipolar circuit breaker with class III
over-voltage category. e main switch must be
installed outside the rooms in a position that
is indicated and accessible. When replacing
the power supply cable, contact a qualified
technician (e.g. the Immergas After-Sales
Technical Assistance Service). e power cable
must be laid as shown in the gure below.
In the event of mains fuse replacement on the
connection terminal board, use a 2A fast fuse. For
the main power supply to the appliance, never
use adapters, multiple sockets or extension leads.
If during connection the L-N polarities are
not respected, the boiler does not detect ame
presence and goes into ignition block.
Key:
1 - Gas cock (EN 331)
2 - Flat gasket
3 - Gas pipe
4 - Nut
Cable for
Power Supply
External relay
(optional)
External
pump
(optional)
230 VAC coil
MAX 0.1 A
External probe
(optional)
Heat adjuster
(OPTIONAL)
Room thermostat
(OPTIONAL)
3-Way Valve
(OPTIONAL)
Summer Switch
(OPTIONAL)
Analogue
input
Clip in for cascade
addresses management
Data download
serial interface
Boiler probe
(OPTIONAL)
FUSE

1-6 1-7 1-8
45
31
58
8 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
Attention: also in the case in which the L-N
polarity is not respected, if there is temporary
residual voltage exceeding 30V on the neutral,
the boiler could function all the same (but
only temporarily). Measure the voltage using
appropriate instruments, without trusting the
voltage tester screwdriver.
1.8 COMMANDS FOR HEAT
ADJUSTMENT OPTIONAL.
e boiler is prepared for the application of a
cascade and zone regulator, zone manager and
external probe.
ese components are available as separate kits
to the boiler and are supplied on request.
Carefully read the user and assembly instructions
contained in the accessory kit.
• e cascade and zone regulator (Fig. 1-6) is
connected to the boiler using only two wires,
powered at 230 V and allows to:
- manage a hydraulic circuit with 2 mixed
zones (mixing valve); 1 direct zone; 1 Storage
tank unit and relative pumps;
- self-diagnosis system to display any boiler
functioning anomalies;
- to set two room temperature values: one for
day (comfort temperature) and one for night
(lower temperature);
- to manage the temperature of the DHW (with
a storage tank unit);
- to manage the boiler flow temperature
depending on the external temperature;
- to select the desired operating mode from
the various possible alternatives for each
individual hydraulic circuit:
- permanent operation in comfort temp;
- permanent operation in lower temp;
- permanent operation in adjustable anti-freeze
temp.
• Zone manager (Fig. 1-7). In addition to the
functions described in the previous point, the
zone manager panel allows to control all the
important information regarding operation
of the appliance and the heating system with
the opportunity of easily intervening on the
previously set parameters without having to
go to the place where the appliance is installed.
e climate chrono-thermostat incorporated
into the remote panel enables the system ow
temperature to be adjusted to the actual needs
of the room being heated, in order to obtain
the desired room temperature with extreme
precision and therefore with evident saving
in running costs. It also allows to display the
eective room temperature and the external
temperature (if external probe is present).
e zone manager is powered directly by the
cascade heat adjuster via 2 wires.
• External temperature probe (Fig. 1-8). e
probe can be connected directly to the boiler
electrical system and allows the max. system
ow temperature to be automatically decreased
when the external temperature increases,
in order to adjust the heat supplied to the
system according to the change in external
temperature. The external probe always
operates when connected, regardless of the
presence or type of heat adjuster used and can
work in combination with both heat adjusters.
e electric connection of the external probe
must take place on clamps G and J on the X86
connection of the boiler. (Fig. 1-4).
Cascade and zone regulator electric connection
or On/o chrono-thermostat (Optional). e
operations described below must be performed aer
having removed the voltage from the appliance.
Any thermostat or On/O environment chrono-
thermostat must be connected to clamps “E” and
“F” eliminating jumper X40 (Fig. 1-4). Make
sure that the On/O thermostat contact is of the
“clean” type, i.e. independent of the mains supply,
otherwise the P.C.B. would be damaged. Any
cascade and zone regulator must be connected
using clamps 37 and 38 to clamps “M” and “O”
on the X86 connection terminal board (in boiler)
respecting the polarity eliminating jumper X40,
(Fig. 1-4) the connection with incorrect polarity,
even if not damaging the heat adjuster, does not
allow its functioning.
Important: if the Digital Remote Control is used,
arrange two separate lines in compliance with
current regulations regarding electrical systems.
No boiler pipes must ever be used to earth
the electric system or telephone lines. Ensure
elimination of this risk before making the boiler
electrical connections.
Installation with system operating at direct
low temperature. e boiler can directly feed a
low temperature system, varying the maximum
ow temperature of the boiler and setting a value
between 20 e 85°C. To vary the maximum ow
temperature of the boiler, modify the maximum
ow temperature of the boiler of parameter No. 4
according to the "parameters mode" procedure.
In this situation it is good practice to insert a
safety device in series with the power supply and
boiler. is device is made up from a thermostat
with a temperature limit of 55°C. e thermostat
must be positioned on the system ow pipe at a
distance of over 2 metres from the boiler.

(A)
(B)
1-9
9 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.9 INSTALLATION OF THE AIR
INTAKE AND FLUE EXHAUST
TERMINALS.
Immergas supplies various solutions separately
from the boilers regarding the installation of air
intake terminals and ue extraction, which are
fundamental for boiler operation.
Attention: the boiler must be installed
exclusively with an original Immergas “Green
Range” air intake and fume extraction system
in plastic, as envisioned by Standard in
force. This system can be identified by an
identification mark and special distinctive
marking bearing the note: “only for condensing
boilers”.
For type B 23 boilers:
e plastic pipes cannot be installed outdoors,
for tracts longer than 40 cm, without suitable
protectionfrom UVraysandother atmospheric
agents.
• Resistance factors and equivalent lengths. Each
ue extraction system component is designed
with a Resistance Factor based on preliminary
tests and specified in the table below. The
Resistance Factor for individual components is
independent from the type of boiler on which
it is installed and has a dimensionless size. It is
however, conditioned by the temperature of the
uids that pass through the pipe and therefore,
varies according to applications for air intake
or ue exhaust. Each individual component has
a resistance corresponding to a certain length
in metres of pipe with the same diameter; the
so-called equivalent length. All boilers have an
experimentally obtainable maximum Resistance
Factor equal to 100. e maximum Resistance
Factor allowed corresponds to the resistance
encountered with the maximum allowed pipe
length for each type of Terminal Kit. This
information allows calculations to be made to
verify the possibility of setting up various ue
congurations.
Gasket for "green series" flue extraction
elements. In the event component lubrication
(already carried out by the manufacturer) is not
sucient, remove the residual lubricant using a
dry cloth, then to ease tting spread the elements
with common or industrial talc.

10 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
Tables of Resistance Factors and Equivalent Lengths.
DUCT TYPE
Resistance
Factor
(R)
Equivalent
length in m of
concentric pipe
Ø80/125
Equivalent
length in metres
of pipe Ø80
Concentric pipe Ø80/125 m 1 Intake
and
exhaust
4.9
m 1.0 Exhaust
m 4.0
Concentric bend 90° Ø80/125 Intake
and
exhaust
9.5
m 1.9 Exhaust
m 7.9
Concentric bend 45° Ø80/125 Intake
and
exhaust
6.8
m 1.4 Exhaust
m 5.6
Terminal complete with
concentric horizontal
intake-exhaust Ø80/125
Intake
and
exhaust
26.8
m 5.5 Exhaust
m 22.3
Concentric horizontal intake-
exhaust terminal Ø80/125 Intake
and
exhaust
22.9
m 4.7 Exhaust
m 19.0
Terminal complete with
concentric vertical intake-exhaust
Ø80/125 Intake
and
exhaust
16.7
m 3.4 Exhaust
m 13.9
Concentric vertical
intake-exhaust terminal Ø80/125 Intake
and
exhaust
13.3
m 2.7 Exhaust
m 11.0
Pipe Ø80, 1 m Exhaust
1.2 m 0.24 Exhaust
m 1.0
Complete exhaust terminal Ø80, 1 m
Exhaust
3.1 m 0.63 Exhaust
m 2.6
Exhaust terminal Ø80 Exhaust
1.9 m 0.38 Exhaust
m 1.6
Bend 90° Ø80
Exhaust
2.6 m 0.53 Exhaust
m 2.1
Bend 45° Ø80
Exhaust
1.6 m 0.32 Exhaust
m 1.3
Terminal complete with vertical
exhaust Ø80 Exhaust
3.6 m 0.73 Exhaust
m 3

C13 C12
1-11
2
1
3
47
5
6
2
1
3
4
5
8
7
6
C33 C33
1-13 1-14
1-121-10
11 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
e kit includes:
N° 1 - Adapter Ø80/125 (1)
N° 1 - Gasket (2)
N° 1 - Concentric bend Ø80/125 at
87° (4)
N° 1 - Concentric intake-exhaust
terminal Ø80/125 (5)
N° 1 - Internal wall sealing plate (6)
N° 1 - External wall sealing plate (7)
1.10 BOILER INSTALLATION IN TYPE
"C" CONFIGURATION.
e "Victrix 50" boiler leaves the factory with
"B23" configuration (open chamber and fan
assisted), to change the configuration of the
boiler to type "C" (sealed chamber and fan
assisted), disassemble the Ø80 adapter, the
bracket and the gasket present on the boiler cover.
Horizontal intake-exhaust kit Ø80/125
Kit assembly (Fig. 1-10): install the Ø80/125
adapter (1) on the central hole of the boiler fully
home. Slide the gasket (2) along the adapter (1)
up to the relevant groove, Fix it to the lid using
the previously disassembled sheet steel plate (3)
Engage the bend (4) with the male side (smooth)
until it is fully home on the adapter (1). Fit the
Ø80/125 (5) concentric terminal pipe with the
male end (smooth) to the female end of the bend
(4) (with lip seals) up to the stop; making sure
that the internal (6) and external wall sealing
plates (7) have been tted, this will ensure sealing
and joining of the elements making up the kit.
• Coupling extension pipes and concentric
elbows Ø80/125. To push-t extensions with
other elements of the ue extraction elements,
operate as follows Install the concentric pipe
or elbow with the male side (smooth) on the
female section (with lip seal) to the end stop
on the previously installed element. is will
ensure sealing and joining of the elements
correctly.
e kit Ø80/125 can be installed with the rear,
right side, le side or front outlet.
• Extensions for horizontal kit. e horizontal
intake-exhaust kit Ø80/125 can be extended up
to a max. horizontal distance of 14 m (Fig. 1-11)
including the terminal with grid and excluding
the concentric bend leaving the boiler. is
conguration corresponds to a resistance factor
of 100. In these cases the special extensions
must be requested.
N.B.: during the installation of pipes it is
necessary to keep a minimum inclination of 3%
and a dividing strip with gusset must be installed
every 3 metres.
• External grille (Fig. 1-12). The Ø80/125
intake/exhaust terminal, if properly installed,
is pleasant to look at on the outside of the
building. Make sure that the external silicone
sealing plate is properly inserted in the wall.
N.B.: for safety purposes, do not obstruct the
boiler intake-exhaust terminal, even temporarily.
Vertical kit with aluminium tile Ø80/125.
Kit assembly (Fig. 1-13): install the Ø80/125
adapter (1) on the central hole of the boiler fully
home. Slide the gasket (2) along the adapter (1)
up to the relevant groove, Fix it to the lid using
the previously disassembled sheet steel plate (3)
Imitation aluminium tile installation: replace
the tile with the aluminium sheet (5), shaping
it to ensure that rainwater runs o. Position
the xed half-shell (6) on the aluminium tile
and insert the intake-exhaust pipe (7). Fit the
Ø80/125 concentric terminal pipe with the male
end (smooth) to the female end of the adapter
(1) (with lip gaskets) up to the stop; making sure
that the wall sealing plate (4) has been tted, this
will ensure sealing and joining of the elements
making up the kit.
• Coupling extension pipes and concentric
elbows Ø80/125. To snap-t extensions with
other elements of the ue extraction elements,
operate as follows: Install the concentric pipe
or elbow with the male side (smooth) on the
female section (with lip seal) to the end stop
on the previously installed element in order to
ensure sealing eciency of the coupling.
Attention: if the exhaust terminal and/or
extension concentric pipe needs shortening,
consider that the internal duct must always
protrude by 5 mm with respect to the external
duct.
e kit includes:
N° 1 - Adapter Ø80/125 (1)
N° 1 - Gasket (2)
N° 1 - Wall sealing plate (4)
N° 1 - Aluminium tile (5)
N° 1 - Fixed half-shell (6)
N° 1 - Concentric intake-exhaust
terminal Ø80/125 (7)
N° 1 - Mobile half-shell (8)
MAXIMUM LENGTH 18000 mm

2
1
1-15
B23 B23 B23
1-16 1-17
12 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
is specic terminal enables ue exhaust and
air intake, necessary for combustion, in a vertical
direction.
e Ø80/125 vertical kit with aluminium tile
enables installation on terraces and roofs with a
maximum slope between 25% and 45% (24°), the
height between the terminal cap and half-shell
(260 mm) must always be respected.
The vertical kit with this configuration can
be extended up to a maximum of 18 vertical
rectilinear metres (Fig. 1-14), including the
terminal. is conguration corresponds to a
resistance factor of 100. In this case the special
extensions must be requested.
1.11 BOILER INSTALLATION IN TYPE
"B23" CONFIGURATION.
e "Victrix 50" boiler leaves the factory with
type "B23" configuration (open chamber and
fan assisted).
Air intake takes place directly from the
environment in which the boiler is installed
via relevant slots made in the back of boiler and
ue exhaust in individual ue or to the outside.
e boiler in this conguration the boiler is
classied as type B23.
With this conguration:
- air intake takes place directly from the room
in which the appliance is installed;
- the ue exhaust must be connected to its own
individual ue or channelled directly into the
external atmosphere.
- Type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours
or substances (e.g. acid vapours, glues, paints,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of
wood, coal nes, cement, etc.), which may be
damaging for the components of the appliance
and jeopardise functioning.
Vertical kit Ø80.
Kit assembly (Fig. 1-15): install the Ø80 terminal
(2) on the central hole on the boiler up to stop,
making sure that the wall sealing plates (1) have
been tted. is will ensure the sealing eciency
of the kit components.
• Coupling of extension pipes and elbows. To
install push-fitting extensions with other
elements of the ue, proceed as follows: Couple
the pipe or elbow with the male side (smooth)
in the female side (with lip seal) to the end stop
on the previously installed element. is will
ensure sealing eciency of the coupling.
• Extensions for vertical exhaust kits. The
maximum vertical straight length (without
bends), used for Ø80 exhaust pipesis 30 metres
(Fig. 1-16).
Using the Ø80 vertical terminal for direct
discharge of the combustion products, the
terminal must be shortened (see quotas g. 1-17).
e wall sealing plate (1) must also be inserted
in this case going up to stop on the boiler cover.
e kit includes:
N° 1 - Wall sealing plate
(1)
N° 1 - Exhaust terminal
Ø80 (2)
MAXIMUM LENGTH 30 m

13
2
SCARICO
14
3
2
SCARICO
1-18
B23
1-19
B23
1-20
B23 B23
1-21
13 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
Ø80 horizontal kit with wall ue exhaust.
Kit assembly (Fig. 1-18): install the bend Ø80 (1)
with the male side (smooth) fully home on the
central hole of the boiler. Fit the exhaust terminal
(2) with the male end (smooth) to the female
end of the bend (1) up to the stop; making sure
that the internal (3) and external (4) wall sealing
plate has been tted. is will ensure sealing and
joining of the elements making up the kit.
• Coupling of extension pipes and elbows. To
install push-fitting extensions with other
elements of the ue, proceed as follows: Couple
the pipe or elbow with the male side (smooth)
in the female side (with lip seal) to the end stop
on the previously installed element. is will
ensure sealing eciency of the coupling.
Horizontal kit Ø80 with exhaust in ue. Kit
assembly (Fig. 1-20): install the bend Ø80 (1)
with the male side (smooth) fully home on the
central hole of the boiler. Fit the exhaust pipe (2)
with the male end (smooth) to the female end of
the bend (1) up to the stop; making sure that the
internal wall sealing plate (3) has been tted. is
will ensure sealing and joining of the elements
making up the kit.
• Coupling of extension pipes and elbows. To
install push-fitting extensions with other
elements of the ue, proceed as follows: Couple
the pipe or elbow with the male side (smooth)
in the female side (with lip seal) to the end stop
on the previously installed element. is will
ensure sealing eciency of the coupling.
e kit includes:
N° 1 - Bend 90° Ø80 (1)
N° 1 - Exhaust pipe Ø80 (2)
N° 1 - Internal wall sealing plate (3)
e kit includes:
N° 1- Bend 90° Ø80 (1)
N° 1- Exhaust terminal Ø80 (2)
N° 1- Internal wall sealing plate (3)
N° 1- External wall sealing plate (4)
• Extensions for exhaust kits. e maximum
horizontal straight length (without bend in
exhaust), used for Ø80 exhaust pipes is 30
metres (Fig. 1-21).
N.B.: to favour the removal of possible
condensate forming in the exhaust pipe, tilt the
pipes towards the boiler with a min. slope of
1.5%. When installing the Ø80 ducts, a section
clamp with pin must be installed every 3 metres.
1.12 DUCTING OF EXISTING FLUES.
Ducting is an operation through which, within
the context of restructuring a system and
with the introduction of one or more special
ducts, a new system is executed for evacuating
the combustion products of a gas appliance,
starting from an existing ue (or a chimney)
or a technical slot. Ducting requires the use of
ducts declared to be suitable for the purpose by
the manufacturer, following the installation and
user instructions, provided by the manufacturer
and the requirements of the standards in force.
Immergas ducting system Ø80. The "Green
Series" Ø80 exible ducting system must only be
used with Immergas condensing boilers.
In any case, ducting operations must respect
the provisions contained in the standard and in
current technical regulations; in particular, the
declaration of conformity must be compiled at
the end of work and on commissioning of the
ducted system. e instructions in the project
or technical report must likewise be followed, in
cases provided for by the standard and current
technical regulations. e system or components
of the system have a technical life complying with
current standards, provided that:
- It is used in average atmospheric and
environmental conditions, according to
current regulations (absence of combustion
products, dusts or gases that can alter the
normal thermophysical or chemical conditions;
existence of temperatures coming within the
standard range of daily variation, etc.).
- Installation and maintenance must be
performed according to the indications
supplied by the manufacturer and in
compliance with the provisions in force.
- e maximum length of that the Ø80 exible
ducted tract can run is equal to 30 m. is
length is obtained considering the terminal
complete with exhaust, 1m of Ø80 pipe in
exhaust. The two 90° Ø80 bends on boiler
outlet for connecting the ducting system and
two direction changes of the exible pipe inside
the chimney/technical slot.
MAXIMUM LENGTH 30 m
Minimum slope 1.5%
EXHAUST
EXHAUST

B23
1-22
1-23
14 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.13 FLUE EXHAUST WITH BOILERS IN
CASCADE.
e "Victrix 50" boilers installed in cascade (set)
composed of 2 or 3 boilers, can be manifolded
to a unique ue exhaust pipe, which ows into
a ue.
Immergas supplied an appropriate and original
ue exhaust system separately to the boilers.
For correct assembly of the kit, the following
indications must be considered.
- the distance between the boilers (2 or 3) must
be 800 mm (Fig. 1-23);
- the boilers must be positioned on the same
horizontal line;
- the Ø125 exhaust collector must have a
minimum inclination of 3°;
- the discharge of the condensate water produced
by the appliances must be made to ow into a
sewer system;
- the ue gas evacuation collector kit cannot
be installed outdoors (the pipes must not be
exposed to the ultraviolet rays of the sun).
N.B.: check and if necessary regulate the heating
capacity of each individual appliance (see heat
output regulations par.).
Flue exhaust collector assembly (Fig. 1-23):
for proper installation refer to the relative
instructions sheets.
1.14 SYSTEM FILLING.
When the boiler has been connected, ll the
system. Filling is performed at low speed to
ensure release of air bubbles in the water via the
boiler and heating system vents.
The boiler has a built-in automatic venting
valve on the circulator. Check if the cap is loose.
Open the radiator vent valves. Close radiator
vent valves when only water escapes from them.
N.B.: during these operations start up the
circulation pump at intervals, acting on the main
switch positioned on the control panel. Vent the
circulation pump by loosening the front cap and
keeping the motor running. Tighten the cap aer
the operation.
Attention: the "Victrix 5" boiler is not equipped
with an expansion vessel on the system. It
is mandatory to install a closed expansion
vessel to guarantee correct boiler operation.
The expansion vessel must comply with the
European Standards in force. e dimensions of
the expansion vessel depend on the data relative
to the central heating system. Install a vessel
whose capacity responds to the requisites of the
Standards in force.
1.15 FILLING THE CONDENSATE TRAP.
On first lighting of the boiler combustion
products may come out the condensate drain;
aer a few minutes’ operation check that this no
longer occurs. is means that the trap is lled
with condensate to the correct level preventing
the passage of combustion products.
Exhaust
INCLINATION 3°
Exhaust

1-24
A
C
B
D
15 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
Head available to the system.
1.16 GAS SYSTEM STARTUP.
To start up the system, make reference to the
Standard: is divides the systems and therefore
the start-up operations into three categories: new
systems, modied systems, re-activated systems.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked ames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to the regulations in force.
1.17 BOILER START UP IGNITION.
For issue of the Declaration of Conformity
provided for by Italian Law, the following must
be performed for boiler start-up:
- check that the internal system is properly sealed
according to the regulations in force;
- ensure that the type of gas used corresponds to
boiler settings;
- switch the boiler on and ensure correct ignition;
- check that the no. of fan revs is that indicated
in the book (Par. 3.21);
- ensure that the safety device is engaged in the
event of gas supply failure and check activation
time;
- check activation of the master switch located
upstream from the boiler and in the boiler;
- check that the concentric intake-exhaust
terminal (if tted) is not blocked.
e boiler must not be started up even if only
one of the checks should be negative.
N.B.: the boiler preliminary check must be carried
out by a qualied technician. e conventional
boiler warranty is valid as of the date of testing.
e test certicate and warranty is issued to the
user.
1.18 CIRCULATION PUMP.
e “Victrix 50” series boilers are supplied with
a built-in circulation pump with 3-position
electric speed control. e boiler does not operate
correctly with the circulation pump on first
speed. To ensure optimal boiler operation, in the
case of new systems (single pipe and module) it
is recommended to use the pump at maximum
speed. e circulation pump is already tted
with a capacitor.
Pump release. If, aer a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor sha
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
1.19 KITS AVAILABLE ON REQUEST.
• Cascade and zones heat adjuster kit.
• Support kit for xing the heat adjuster to the
wall.
• Zone manager kit.
• Modulating room thermostat kit.
• External probe kit.
• System ow probe kit.
• DHW probe kit for external storage tank.
• Anti-freeze kit with -15°C resistance.
• Individual boiler safety devices stub pipes kit.
• Boilers in cascade safety devices stub pipes kit.
• Three-way valve kit for coupling external
storage tank unit.
• Individual boiler hydraulic circuit breaker kit.
• Hydraulic connection collectors kit with two
boilers in cascade.
• Additional boiler in cascade hydraulic collector
kit.
• Flue exhaust collector kit with ue adjusting
devices with two boilers in cascade.
• Flue exhaust collector kit with ue adjusting
device with additional boiler in cascade.
• Ø80/125 horizontal concentric kit.
• Ø80/125 vertical concentric kit.
• Ø80 horizontal kit with ue exhaust.
• Ø80 horizontal terminal kit with wall flue
exhaust.
• Ø80 vertical terminal kit.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
A = Head available to the system on the individual boiler maximum speed
B = Head available to the system on the individual boiler second speed
C = Head available to the system on maximum speed with non-return valve for boilers in cascade (set)
D = Head available to the system on second speed with non-return valve for boilers in cascade (set)
Head (m H2O)
Flow rate (l/h)
Head (kPa)

1-25
16 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.20 BOILER COMPONENTS.
Key:
1 - P.C.B.
2 - Flow collector
3 - System pressure switch
4 - Air intake pipe
5 - Air fan
6 - Gas nozzle
7 - Venturi pipe
8 - Detection electrode
9 - Condensation module cover
10 - Sleeve with seats for Venturi pipe
11 - Condensation module
12 - Sample points (air A) - (ue gases F)
13 - Flue hood
14 - System return regulation NTC probe
15 - Flue safety thermostat
16 - Manual air vent valve
17 - System ow regulation NTC probe
18 - Over-heating safety thermostat
19 - Ignition electrode
20 - Burner
21 - Current transformer
22 - Air vent valve
23 - Pump
24 - Condensate siphon
25 - Gas valve
26 - 4 bar safety valve
27 - Draining funnel

1-26
17 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.21 HYDRAULIC DIAGRAM CON OPTIONAL.
Key:
1 - Generator
2 - ermometer pocket
3 - Probe for fuel shut-o valve bulb
4 - Manometer-holder cock
5 - ermometer
6 - Manual rearm thermostat
7 - Manual rearm pressure switch
8 - Boiler connection 3-way valve
9 - Hydraulic/mixing collector
10 - Attachment for expansion vessel
11 - Expansion vessel
12 - Fuel shut-o valve
13 - Slurry collection brass lter
14 - Damper coil
15 - Manometer
16 - Connection for minimum pressure switch
Attention: the sensitive elements of the automatic
regulation and block circuit breaker switches and
of the thermometer (not supplied as standard
with the boiler) must be arranged as described
in the installation instructions. Whenever the
generators are not installed in set according to the
instructions and the Immergas original kits, the
sensitive elements must be installed on the ow
piping to the central heating system, immersed in
the current of water at not more than 0.5 metres
from the boiler outlet.
the boilers must be installed in the congurations
and with their own Immergas original set
and safety kits.
Immergas S.p.a. declines all
liability whenever the installer does not use the
devices and Immergas original kits or uses them
improperly.

1-27
1-28
18 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.22 HYDRAULIC DIAGRAM FOR NO. 2 BOILERS IN CASCADE WITH OPTIONAL.
Attention: the modular boilers, i.e. installed
in cascade (set) with an Immergas original
Key:
1 - ermometer pocket
2 - ermometer
3 - Manual rearm thermostat
4 - Manometer-holder cock
5 - Probe for fuel shut-o valve bulb
6 - Manual rearm pressure switch
7 - Attachment for expansion vessel
8 - System return non-return valve
9 - System cut-o valves
10 - Generator
11 - ree-way draining valve
12 - Damper coil
13 - Manometer
14 - Connection for minimum pressure switch
1.23 HYDRAULIC DIAGRAM FOR NO. 3 BOILERS IN CASCADE WITH OPTIONAL.
Attention: the modular boilers, i.e. installed
in cascade (set) with an Immergas original
connection kit, must be considered a unique
appliance, which assumes the serial number
(factory number) of the boiler nearest to the
safety devices.
Key:
1 - ermometer pocket
2 - ermometer
3 - Manual rearm thermostat
4 - Manometer-holder cock
5 - Probe for fuel shut-o valve bulb
6 - Manual rearm pressure switch
7 - Attachment for expansion vessel
8 - System return non-return valve
9 - System cut-o valves
10 - Generator
11 - ree-way draining valve
12 - Damper coil
13 - Manometer
14 - Connection for minimum pressure
switch
connection kit, must be considered a unique
appliance, which assumes the serial number
N.B.: before closing one or both the system cut-
o cocks (9), the boiler must be switched o.
(factory number) of the boiler nearest to the
safety devices.

1-29
19 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.24 INSTALLATION EXAMPLES OF INDIVIDUAL BOILER.
Key: 1 - Generator 2 - Cascade and zone regulator 3 - Zone manager 4 - Modulating room thermostat 5 - External probe 6 - Zone 1 temperature probe (CMI-1) 7 - Zone 2 temperature probe (CMI-2) 8 - Common ow probe 9 - Storage tank unit temperature probe 10 - Zone 1 mixing valve (CMI-1) 11 - Zone 2 mixing valve (CMI-2) 12 - Zone 1 central heating circuit pump (CMI-1) 13 - Zone 2 central heating circuit pump (CMI-2) 14 - Zone 3 direct circuit pump (CD)
15 - Storage tank unit feeding pump 16 - Zone 1 safety thermostat (CMI-1) 17 - Zone 2 safety thermostat (CMI-2) 19 - Fuel shut-o valve bulb 20 - INAIL type-approved manometer-holder cock 21 - ermometer 22 - Manual rearm thermostat 23 - Manual rearm pressure switch 24 - Attachment for expansion vessel 25 - Expansion vessel 26 - Collector/mixer 27 - External storage tank unit 28 - Fuel shut-o valve 29 - Non return valve 30 - Slurry collection system lter 31 - ermometer pocket 32 - Damper coil 33 - Manometer 34 - Connection for minimum pressure switch
ZONE 1 ZONE 2 ZONE 3

1-30
20 - IE
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.25 INSTALLATION EXAMPLES OF BOILER IN CASCADE.
Key: 1 - Generator 2 - Cascade and zone regulator 3 - Zone manager 4 - Modulating room thermostat 5 - External probe 6 - Zone 1 temperature probe (CMI-1) 7 - Zone 2 temperature probe (CMI-2) 8 - Common ow probe 9 - Storage tank unit temperature probe 10 - Zone 1 mixing valve (CMI-1) 11 - Zone 2 mixing valve (CMI-2) 12 - Zone 1 central heating circuit pump (CMI-1)
13 - Zone 2 central heating circuit pump (CMI-2) 14 - Zone 3 direct circuit pump (CD) 15 - Storage tank unit feeding pump 16 - Zone 1 safety thermostat (CMI-1) 17 - Zone 2 safety thermostat (CMI-2) 19 - Fuel shut-o valve bulb 20 - Manometer-holder cock 21 - ermometer 22 - Manual rearm pressure switch 23 - Manual rearm thermostat 24 - Attachment for expansion vessel 25 - Expansion vessel 26 - Collector/mixer 27 - External storage tank unit 28 - Fuel shut-o valve 29 - Non return valve 30 - Slurry collection system lter 31 - ermometer pocket 32 - Flue circuit ue adjusting device 33 - Stub pipe drain trap 34 - System cut-o valve 35 - ree-way draining valve 36 - Damper coil 37 - Manometer 38 - Connection for minimum pressure switch
ZONE 1 ZONE 2 ZONE 3