MCZ HYDRO Guide

Introduction Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
*Some installation advice given in this manual could
contravenes UK building regulations guidelines.
A supplementary instruction manual in provided to
give correct advice for installations within the UK”
8901137200
USE AND MAINTENANCE
MANUAL*
EN

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 2
Introduction Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
INTRODUCTION ....................................................................................................................................4
1. WARNINGS AND GUARANTEE CONDITIONS.....................................................................................5
1.1.SAFETY INSTRUCTIONS..................................................................................................................5
1.2.OPERATING WARNINGS..................................................................................................................6
1.3.WARNINGS FOR THE CORRECT DISPOSAL OF THE PRODUCT............................................................7
1.4.GUARANTEE CONDITIONS ..............................................................................................................7
1.4.1.Limitations...............................................................................................................................7
1.4.2.Exclusions................................................................................................................................8
2. THEORETICAL NOTIONS FOR INSTALLATION ..................................................................................9
2.1.Pellets............................................................................................................................................9
2.2.PRECAUTIONS FOR INSTALLATION................................................................................................10
2.3.OPERATING AREA.........................................................................................................................11
2.4.CONNECTION TO THE EXTERNAL AIR INTAKE................................................................................11
2.5.CONNECTION OF SMOKE DISCHARGE PIPE....................................................................................12
2.6.CONNECTION TO THE FLUE PIPE...................................................................................................13
2.7.CONNECTION TO AN EXTERNAL FLUE WITH INSULATED OR DOUBLE-WALL PIPE.............................13
2.8.CONNECTION TO THE FLUE PIPE...................................................................................................13
2.9.OPERATING PROBLEMS CAUSED BY DRAUGHT DEFECTS IN THE FLUE.............................................14
2.10.PLUMBING CONNECTION...........................................................................................................15
3. INSTALLATION AND ASSEMBLY......................................................................................................16
3.1.DRAWINGS AND TECHNICAL CHARACTERISTICS............................................................................16
3.1.1.EGO HYDRO Dimensions.........................................................................................................16
3.1.2.STAR HYDRO Dimensions .......................................................................................................16
3.1.3.Dimensions of the HYDRO 15-22 version CLUB without domestic hot water production kit............17
3.1.4.Dimensions of the HYDRO 22 version CLUB equipped with kit for domestic hot water production..17
3.1.5.Dimensions of the HYDRO 15-22 version SUITE without domestic hot water production kit ..........18
3.1.6.Dimensions of the HYDRO 22 version SUITE equipped with kit for domestic hot water production.18
3.1.7.Dimensions of the HYDRO 15-22 version MUSA without domestic hot water production kit...........19
3.1.8.Dimensions of the HYDRO 22 version MUSA equipped with kit for domestic hot water production. 19
3.1.9.Technical characteristics .........................................................................................................20
3.2.PREPARATION AND UNPACK ING...................................................................................................23
3.3.LATERAL CLADDING ASSEMBLY.....................................................................................................26
3.3.1.Assembly of profiles for inserting the steel sides-EGO................................................................26
3.3.2.Assembly of profiles for inserting the ceramic and soapstone sides-STAR....................................27
3.3.3.Assembly of the lower panel – Suite and Club Stoves ................................................................28
3.3.4.Installation of side tiles - Suite and Club Stoves ........................................................................29
3.3.5.Installation of ceramic top - Suite and Club Stoves....................................................................29
3.3.6.Assembly of sides on the MUSA stove ......................................................................................30
3.4.PLUMBING SYSTEM CONNECTION .................................................................................................31
3.4.1.Connections to the system......................................................................................................33
3.4.2.System filling .........................................................................................................................34
3.4.3.Water characteristics..............................................................................................................34
3.5.KIT FOR DOMESTIC HOT WATER PRODUCTION (Optional) Only for Suite/Club/Musa stoves...............35
3.6.EXAMPLE INSTALLATION DIAGRAMS .............................................................................................36
3.6.1.Installation diagram for heating system without domestic hot water kit
(EGO/STAR/SUITE/CLUB/MUSA)...........................................................................................................36
3.6.2.Installation diagram for heating system with domestic hot water kit (SUITE/CLUB/MUSA)............37
3.6.3.Heating installation diagram in combination with a boiler...........................................................38
3.6.4.Heating installation in combination with a storage tank..............................................................38
3.7.INSTALLATION OF AIR FILTER ......................................................................................................39
3.8.OPENING/CLOSING THE DOOR......................................................................................................39
3.9.MAKING THE ELECTRICAL CONNECTIONS......................................................................................39
4. OPERATION .....................................................................................................................................40

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 3
Introduction Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
4.1.PRE-LIGHTING WARNINGS............................................................................................................40
4.2.PRE-LIGHTING CHECK ..................................................................................................................41
4.3.LOADING THE PELLETS.................................................................................................................41
4.4.SUPPLEMENTARY HOPPER CONDUIT (accessory)............................................................................41
4.5.DISPLAY PANEL AND COMMANDS..................................................................................................42
4.5.1.Control panel logic..................................................................................................................42
4.6.SETTINGS TO CARRY OUT BEFORE FIRST LIGHTING ......................................................................44
4.6.1.Setting current day and time...................................................................................................44
4.6.2.Setting the language ..............................................................................................................45
4.6.3.Procedure for recipe selection .................................................................................................46
4.7.CONTROL OF WATER TEMPERATURE IN BOILER ............................................................................46
4.8.FIRST LIGHTING ..........................................................................................................................47
4.8.1.Start-up/shutdown from the control panel................................................................................47
4.8.2.Note on first ignition...............................................................................................................47
4.9.OPERATING MODE........................................................................................................................48
4.9.1.Operating concept..................................................................................................................48
4.9.2.Automatic mode.....................................................................................................................48
4.9.2.1. Room sensor ...................................................................................................................48
4.9.2.2. Connecting an external room thermostat (3) or storage tank (3) ..........................................49
4.9.3.Automatic mode with AUTO-ECO.............................................................................................50
4.9.3.1. Activation /de-activation of AUTO-ECO mode .....................................................................51
4.10.HOT AIR VENTILATION SUITE-CLUB-MUSA 22 KW......................................................................52
4.11.SLEEP FUNCTION......................................................................................................................53
4.12.TIMER......................................................................................................................................53
4.12.1.Current date and clock ........................................................................................................53
4.12.2.TIMER activation and selection of a programme. ...................................................................54
4.12.3.TIMER de-activation............................................................................................................55
4.13.PRE-SET WEEKLY AND DAILY PROGRAMMES...............................................................................55
4.13.1.Weekly programmes............................................................................................................55
4.13.2.Daily programmes...............................................................................................................57
4.14.PRACTICAL EXAMPLE OF DAILY PROGRAMMING..........................................................................58
4.14.1.Setting of a daily programme...............................................................................................58
4.15.SAFETY DEVICES.......................................................................................................................59
4.16.ALARM SIGNALLING ..................................................................................................................60
4.17.Exiting alarm condition...............................................................................................................62
4.17.1.Shutdown of the stove ........................................................................................................62
5. MAINTENANCE AND CLEANING ......................................................................................................63
5.1.DAILY OR WEEKLY CLEANING PERFORMED BY THE USER ...............................................................63
5.1.1.BEFORE EACH IGNITION ........................................................................................................63
5.1.2.Check every 2/3 days .............................................................................................................63
5.1.3.Clean the exchanger and the undergrate space every 2/3 days..................................................64
5.1.4.Cleaning the glass..................................................................................................................65
5.1.5.Cleaning of the air filter ..........................................................................................................65
5.1.6.Cleaning of stainless steel and satin-finish surfaces...................................................................65
5.1.7.Cleaning of painted parts........................................................................................................65
5.2.CLEANING TO BE PERFORMED BY SPECIALIZED TECHNICIAN..........................................................66
5.2.1.Cleaning the heat exchanger and the pipe unit .........................................................................66
5.2.1.1. CLEANING THE EXCHANGER AND PIPE UNIT (EGO/STAR) ..................................................66
5.2.1.2. CLEANING THE EXCHANGER AND PIPE UNIT (SUITE/MUSA and CLUB): ...............................67
5.2.2.Shutting the stove down (end of season) .................................................................................68
5.3.CHECK OF INTERNAL COMPONENTS..............................................................................................68
6. PROBLEMS / CAUSES / SOLUTIONS ...............................................................................................70
7. ELECTRICAL DIAGRAMS .................................................................................................................73
7.1.HEATING-ONLY VERSION..............................................................................................................73
7.2.VERSION THAT PRODUCES DHW..................................................................................................74

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 4
Introduction Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
INTRODUCTION
Dear Customer,
We wish to thank you for choosing an MCZ product, specifically a stove
of the MCZ pellet line.
In order to get the best performance from your stove and to
enjoy to the full the warmth and the sense of well-being which
the flame will diffuse through the home, we recommend that
you read this booklet carefully before lighting the s
tove for the first time.
While thanking you again, may we remind you that the stove MUST
NOT be used by children, and that they must always be kept at a safe
distance from it!
Revisions to the publication
In order to improve the product, to keep this publication up to date the
manufacturer reserves the right to make modifications without any
advance notice. Any reproduction, even in part, of this manual without
the consent of the manufacturer is prohibited.
Care of the manual and how to consult it
Take good care of this manual and keep it in a place which can
easily and quickly be reached.
If this manual should be lost or destroyed, or if it is in poor
condition, ask for a copy from your retailer or directly from the
manufacturer, providing product identification data.
Information which is essential or that requires special attention is
shown in bold text.

Italic text is used to call your attention to other paragraphs in the
manual or for any additional clarifications.
SYMBOLS USED IN THE MANUAL
ATTENTION
This warning sign indicates that the message to which it
refers should be carefully read and understood, because
failure to comply with what these notices say can cause
serious damage to the stove and put the user's safety at
risk.
INFORMATION
This symbol is used to highlight information which is
important for proper stove operation. Failure to comply with
these provisions will compromise use of the stove and its
operation will not be satisfactory.
OPERATING SEQUENCES:
Indicates a sequence of buttons to be pushed to access
menus or to make adjustments.
MANUAL
Indicates that you should carefully read this manual or the
related instructions.

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 5
Warnings and guarantee conciliations Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
1. WARNINGS AND GUARANTEE CONDITIONS
1.1. SAFETY INSTRUCTIONS
Installation of the stove, making the electrical
connections, checking its operation, and
maintenance are all tasks which should be carried
out by qualified and authorised personnel.
Install the stove in accordance with the
regulations in force in your local area, region and
country.
This apparatus cannot be used by people
(including children with limited physical,
sensorial or mental abilities or with little
experience and know-how unless they have been
viewed or instructed on the use of the apparatus
by the person responsible for its safety.
For the correct use of the stove and of the electronic
apparatus connected to it, and to prevent accidents, the
instructions given in this booklet must always be
followed.
Use, adjustment and programming must be carried out
by adults. Errors or incorrect settings may cause
hazardous conditions and/or poor operation.
Before beginning any operation, the user, or whoever is
preparing to operate on the stove, must have read and
understood the entire contents of this instruction
booklet.
The stove is to be used only for its intended purpose.
Any other use is to be considered improper and
therefore hazardous.
Do not use the stove for standing on or as any kind of
support.
Do not put clothes to dry on the stove Any clothes
hangers and suchlike must be kept a suitable distance
from the stove. Danger of fire.
All responsibility for improper use is taken entirely by
the user and such use relieves MCZ of any civil or
criminal responsibility.
Any kind of tampering or unauthorised substitution of
non-original spare parts can be hazardous for the safety
of the operator and relieves MCZ of any civil or criminal
responsibility.
Most of the surfaces of the stove are extremely hot (the
door, the handle, the glass, smoke discharge pipes etc.).
Avoid coming into contact with these parts, therefore,
without adequate protective clothing or suitable
implements, such as gloves with thermal protection or
implements which keep the hands cool.
Under no circumstances should the stove be run
with the door open or the glass broken.
Do not touch the stove with wet hands, in view of the
fact that it is an electrical appliance. Always disconnect
the supply cable before doing anything to the unit.
Before carrying out any cleaning or maintenance
operation, make sure in advance that the stove is
disconnected from the mains electricity supply, by
turning off the main switch located on the back of the

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 6
Warnings and guarantee conciliations Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
stove, or by unplugging the supply cable.
The stove must be connected to an electrical system
which is equipped with an earth conductor.
The system must be of adequate rated capacity for the
stated electrical power of the stove.
Incorrect installation or faulty maintenance (not
conforming to the requirements set out in this booklet)
can cause harm to people, animals or property. In such
cases MCZ is absolved from any civil or criminal
responsibility.
Live electrical parts: only power the product after
completing assembly.
Disconnect the product from the 230V power supply
before performing any maintenance operation.
1.2. OPERATING WARNINGS
Shut the stove down in the event of a breakdown or
bad running.
Pellets must not be fed manually into the burner.
Accumulated unburnt pellets in the burner after
repeated failed ignitions must be removed before
lighting.
Do not wash the inside of the stove with water.
Do not wash the stove with water. The water could get
inside the unit and damage the electrical insulation and
cause electric shocks.
Do not expose your own body to hot air for extended
periods. Do not overheat the room you are in and
where the stove is installed. This could cause injuries
and health problems.
Do not expose plants or animals directly to a current of
hot air. Both plants and animals could be harmed by it.
Do not put any fuels in the hopper but wood pellets.
Install the stove in a location which is suitable for
firefighting, and equipped with all services such as air
and electricity supply and provision for discharging
combustion gases.
If there is a fire in the flue pipe, extinguish the stove,
disconnect it from the power supply and never open
the door. Then contact the competent authorities.
If the stove and the ceramic cladding are in storage, it
should be in a place that is free of damp, and they
should not be exposed to extremes of temperature.
It is inadvisable to base the stove directly on the floor,
and if the floor is made of flammable material, it must
be suitably insulated.
Do not light the stove with flammable materials if the
ignition system breaks down.
INFORMATION
In case of any problems, get in touch with your dealer, or
a qualified engineer authorised by MCZ, and if a repair is
necessary, insist on the use of original spare parts.
Use only the fuel recommended by MCZ (for Italy pellets
with a diameter of 6 mm and for other European
countries with a diameter of 6-8 mm) and provided only
with an automatic supply system.

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 7
Warnings and guarantee conciliations Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
Periodically check and clean the smoke outlet ducts
(connection to the flue pipe).
Accumulated unburnt pellets in the burner after
repeated failed ignitions must be removed before
lighting.
The pellet stove is not a cooking appliance.
Always keep the cover of the fuel hopper closed.
Keep this instruction manual carefully because it must
stay with the stove throughout its working life. If the
stove is sold or transferred to another user, always
make sure that the booklet goes with the product.
If it gets lost, ask MCZ or your authorised dealer for
another copy.
1.3. WARNINGS FOR THE CORRECT DISPOSAL OF THE PRODUCT
The owner is the sole party responsible for demolishing and disposing
of the product. This must be performed in compliance with laws related
to safety and environmental protection in force in his/her country.
At the end of its working life, the product must not be disposed of as
urban waste.
It must be taken to a special differentiated waste collection centre set
up by the local authorities or to a retailer that provides this service.
Separating and recycling prevents potential negative effects on the
environment and health (often caused by inappropriately disposing of
product parts). It also allows materials to be recovered in order to
obtain significant savings in energy and resources.
1.4. GUARANTEE CONDITIONS
MCZ guarantees the stove, excluding the components
which are subject to normal, for a period of two years
from the date of purchase, as proved by a supporting
document which gives the name of the vendor and the date
on which the sale took place. The guarantee is conditional
on the guarantee certificate being filled in and returned
within 8 days, and requires that the product be installed and
tested by a specialised installer, according to the detailed
instructions given in the instruction booklet supplied with the
product.
The term 'guarantee' is to be understood to denote the free-
of-charge replacement or repair of parts recognised to
have been defective at the start by reason of
manufacturing defects.
1.4.1. Limitations
The above guarantee does not cover components relating to electrical
and electronic parts, or fans, on which the guarantee period is 1 year
from the purchase of the product, documented as specified above. The
guarantee does not cover parts subject to normal wear such as
gaskets, glass, and any parts with can be removed from the firebox.
The replacement parts will be guaranteed for the remainder of the
guarantee period starting from the date of purchase of the product.

PELLET STOVES Chapter 1
INSTALLATION AND USE MANUAL page 8
Warnings and guarantee conciliations Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
1.4.2. Exclusions
Variations in colour in the painted or ceramic parts, and crackling of the
glaze on the ceramics, do not constitute grounds for a claim under the
guarantee, as they are natural characteristics of the material and of the
use of the product.
The guarantee does not cover any parts which may be found to be
faulty as a result of negligence or carelessness in use, or of incorrect
maintenance, or of installation not complying with MCZ's specification
(see the relevant chapters in this user manual).
MCZ refuses to accept any responsibility for any damage which may be
caused, directly or indirectly, by persons, animals or things in
consequence of the failure to observe all the prescriptions laid down in
the instruction booklet, especially those concerning warnings on the
subject of installation, use and maintenance of the appliance.
If the product does not perform correctly, contact your local retailer
and/or importer.
Damage caused by transport and/or handling is excluded from the
guarantee.
For installation and use of the product, reference must be made
exclusively to the booklet supplied.
The guarantee will be invalidated in the event of damage caused by
tampering with the appliance, atmospheric agents, natural disasters,
electrical discharges, fire, defects in the electrical system, and caused
by lack of, or incorrect, maintenance in terms of the manufacturer's
instructions.
CLAIMS UNDER THE GUARANTEE
the request for action under the guarantee must be
addressed to the retailer, who will forward the claim
to MCZ's technical assistance service.
MCZ refuses to accept any responsibility in the event
that the stove or any other accessory have been
improperly used or modified without authorisation.
For all replacement of parts, only original MCZ spare
parts must be used.

PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL page 9
Theoretical notions for installation Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
2. Theoretical notions for installation
2.1. Pellets
Wood pellets are manufactured by hot-extruding compressed sawdust which
is produced during the working of natural dried wood. The compactness of
the material comes from the lignin which is contained in the wood itself, and
allows the production of pellets without the use of glues or binders.
The market offers different types of pellet with characteristics which
vary depending on what mixture of woods is used. The diameter varies
between 6 mm and 8 mm, with a standard length in the range 5 mm to
30 mm. Good quality pellets have a density which varies between 600
kg/m3 and 750 kg/m3, with a moisture content which varies from 5%
to 8% by weight.
Besides being an ecological fuel (exploiting timber residues to the
maximum and achieving cleaner combustion than is possible with fossil
fuels), pellets also have technical advantages. While good-quality
timber has a calorific power of 4.4 kW/kg (with 15% moisture,
therefore after about 18 months' seasoning), the equivalent figure for
pellets is 4,9 kW/kg.
To ensure good combustion, the pellets must be stored in an area that
is free of humidity and protected from dirt. The pellets are usually
supplied in 15 kg. sacks, so storing them is very convenient.
Good quality pellets ensure good combustion, thus lowering the
emission of harmful agents into the atmosphere.
The poorer the quality of the fuel, the more
frequently will intervention be necessary for cleaning
the internal parts, such as the grate and the
combustion chamber.
The main certifications of quality for pellets in the European market are
DINplus and Ö-Norm M7135;these ensure respect of:
Calorific power: 4.9 kW/kg
Water content: max 10% of weight
Percentage of ashes: max 0,5% of weight
Diameter: 5 – 6mm
Length: max 30mm
Contents: 100% untreated wood, with no added bonding
substances (bark percentage 5% max)
Packaging: in sacks made from ecologically compatible or
biologically decomposing material
Fuel pellets
15 Kg sack of fuel

PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL page 10
Theoretical notions for installation Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
MCZ strongly recommends using certified fuel in its
stoves (DINplus e Ö-Norm M7135).
The use of fuel of inferior quality or not conforming
to the specification given above compromises the
running of your stove and can therefore lead to the
termination of the guarantee and of the
manufacturer's responsibility for the product.
MCZ pellet stoves run exclusively on pellets with a
diameter of 6 mm (only for Italy) and 6-8 mm
(European countries) with lengths that go from 5
mm to 30 mm.
2.2. PRECAUTIONS FOR INSTALLATION
IMPORTANT!
Installation and assembly of the stove must be
carried out by qualified personnel.
The stove must be installed in a suitable position to allow the normal
operations of opening and ordinary maintenance.
The site must be:
capable of providing the environmental conditions for operation
equipped with power supply 230V 50 Hz
capable of taking an adequate system for smoke discharge
provided with external ventilation
provided with an earth connection complying with CEI
The stove must be connected to a flue pipe or an internal or
external vertical duct conforming to current standards UNI
7129 - 7131 9615.
The stove must be positioned in such a way that the electrical
plug is accessible.
IMPORTANT!
The stove must be connected to a flue pipe or a
vertical duct which can discharge the fumes at the
highest point of the building.
The fumes are however derived from the combustion
of wood products, and if they come into contact with
or close to walls, they can make dirty marks.
Also take care because the fumes are very hot but
almost invisible, and can cause burns on contact.
The holes for the passage of the smoke pipe and for
the intake of air from outside should be made before
positioning the stove unit.

PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL page 11
Theoretical notions for installation Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
2.3. OPERATING AREA
For proper functioning and a good temperature distribution, the stove
should be positioned in a location where it is able to take in the air
necessary for combustion of the pellets (about 40 m3/h must be
available), as laid down in the standard governing the installation and
in accordance with local national standards.
The volume of the room must not be less than 30 m3.
The air must come in through permanent openings made in walls (in
proximity to the stove) which give onto the outside, with a minimum
cross-section area of 100 cm2.
These openings must be made in such a way that it is not possible for
them to be obstructed in any way.
Alternatively, the air can be taken from rooms adjacent to the one
which needs ventilating, as long as they are provided with an air intake
from the outside, and are not used as bedrooms or bathrooms, and
provided there is no fire risk such as there is for example in garages,
woodsheds, and storerooms, with particular reference to what is laid
down in current standards.
It is not permissible to install the stove in bedrooms,
bathrooms, or in a room where another heating
appliance is installed (fireplace, stove etc.) which
does not have its own independent air intake.
Locating the stove in a room with an explosive
atmosphere is prohibited.
The floor of the room where the stove is to be
installed must be strong enough to take its weight.
If walls are flammable, maintain a minimum distance of 10cm at the
rear (A), 10cm at the side (B) and 100 cm at the front.
If the room contains objects which are believed to be particularly
delicate, such as drapes, sofas and other furniture, their distance from
the stove should be considerably increased.
If the flooring is made of wood, provide a floor
protection surface in compliance with current
national standards.
2.4. CONNECTION TO THE EXTERNAL AIR INTAKE
It is essential that at least as much air must be able to flow into the
room where the stove is installed as is required for proper combustion
in the appliance and for the ventilation of the room. This can be
effected by means of permanent openings in the walls of the room to
be ventilated, which give onto the outside, or by single or collective
ventilation ducts.
For this purpose, on the external wall near the stove, a hole must be
made with a minimum free cross-section of 100 cm². (equivalent to a
round hole of 12 cm diameter or a square hole 10x10 cm), protected by
a grille on the inside and the outside.
The air intake must also:
communicate directly with the room where the stove is installed
be protected by a grille, metal mesh or suitable guard, as long as
this does not reduce the area below the minimum.
Example of pellet stove installation
Example of pellet stove installation

PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL page 12
Theoretical notions for installation Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
2
1
be positioned in such a way as to be impossible to obstruct
It is not compulsory to connect the air intake directly
with the stove (so that it draws air directly from
outside), but it is essential at all events to ensure an
airflow of 50 cubic metres per hour by the use of a
hole of the dimensions given.
See standard UNI 10683.
2.5. CONNECTION OF SMOKE DISCHARGE PIPE
When making the hole for the passage of the smoke discharge pipe, it
is necessary to take into account the possible presence of flammable
materials. If the hole will be going through a wall made of wood or any
other material which is sensitive to heat, the INSTALLER MUST first
of all use the special wall union (diam.13cm 13cm minimum) and
properly insulate the pipe of the stove that passes through it, using
adequate insulation materials (thickness 1.35cm with minimum thermal
conductivity of 0.07 W/m°K).
The same is true if the stove pipe must run through vertical or
horizontal stretches passing in proximity (min.20cm) to the heat-
sensitive wall
As an alternative we recommend the use of insulated pipe, which can
also be used on the outside to avoid condensation.
The combustion chamber works in low pressure. The smoke duct for
the discharge of fumes will also be under low pressure when connected
to an efficient flue pipe as directed.
Pipes and unions with suitable gaskets must always
be used, to guarantee a hermetic seal.
All sections of the smoke duct must be inspectable and
removable to enable periodic internal cleaning. Tee
connectors with inspection caps should be used.
Position the stove bearing in mind all the instructions and
considerations above.
IMPORTANT!
All 90 degree changes of direction in the flue pipe
must be fitted with suitable tee connectors to allow
the possibility of inspection. (see accessories for
pellet stove)
It is absolutely prohibited to fit a grille on the end of
the discharge pipe, because it could lead to poor
running of the stove.
FOR CONNECTION TO THE FLUE PIPE, NOT MORE
THAN 2-3 METRES OF HORIZONTAL PIPE MUST BE
USED AND NOT MORE THAN THREE 90° CURVES
MUST BE USED
IT IS ALSO ADVISABLE NOT TO EXCEED 6 METRES IN
LENGTH WITH THE PIPE Ø 80 mm
Rear view of a pellet stove
1) Combustion air intake
2) Smoke outlet
Example of pellet stove installation

PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL page 13
Theoretical notions for installation Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
2.6. CONNECTION TO THE FLUE PIPE
The flue pipe must have internal dimensions not larger than 20 x 20
cm, or diameter 20 cm. In the event of larger dimensions, or of the
flue pipe being in poor condition (for example cracks, poor insulation,
etc.), it is advisable to fit a stainless steel pipe of suitable diameter
inside the flue pipe throughout its length, right up to the top.
Check with suitable instruments that there is a minimum draught of 10
Pa.
At the bottom of the flue pipe, provide an inspection cap to allow
periodic checking and cleaning, which must be done annually.
Make a gas-tight connection to the flue pipe, using pipes and
connectors as recommended by us.
You must ensure that a windproof cowl should be fitted which complies
with the standards in force.
This type of connection ensures the evacuation of the
fumes even in the event of a temporary power cut.
2.7. CONNECTION TO AN EXTERNAL FLUE WITH
INSULATED OR DOUBLE-WALL PIPE
The external fluepipe must have internal dimensions of minimum
10x10 cm or 10 cm diameter, and maximum 20x20 cm or 20 cm
diameter.
Check with suitable instruments that there is a minimum draught of 10 Pa.
The only type of pipe which is permissible is insulated (double-walled)
stainless steel, smooth on the inside, fixed to the wall. Flexible stainless
steel pipe must not be used. At the bottom of the flue pipe, provide an
inspection cap to allow periodic checking and cleaning, which must be
done annually. Make a gas-tight connection to the flue pipe, using
pipes and connectors as recommended by us.
You must ensure that a windproof cowl should be fitted which complies
with the standards in force.
This type of connection ensures the evacuation of the
fumes even in the event of a temporary power cut.
2.8. CONNECTION TO THE FLUE PIPE
For proper functioning, the connecting pipe between the stove and the
chimney or flue duct must have a slope of not less than 3% in the
horizontal stretches, the length of which must not exceed 2/3
metres, and the vertical distance between one tee connector and
another (change of direction) must not be less than 1.5m.
Check with suitable instruments that there is a minimum draught of 10
Pa.
At the bottom of the flue pipe, provide an inspection cap to allow
periodic checking and cleaning, which must be done annually.
Make a gas-tight connection to the flue pipe, using pipes and
connectors as recommended by us.
You must ensure that a windproof cowl should be fitted which complies
with the standards in force.
This type of connection ensures the evacuation of the
fumes even in the event of a temporary power cut.
0,5 mt.
1
2
3
1) Windproof cowl
2) Flue pipe
3) Inspection
0,5 mt.
2
1
3
1) Windproof cowl
2) Flue pipe
3) Inspection
3-5 %
2 - 3 mt. MAX
0,5 mt.
H>1,5mt.
3
2
1
1) Windproof cowl
2) Flue pipe
3) Inspection

PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL page 14
Theoretical notions for installation Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
2.9. OPERATING PROBLEMS CAUSED BY DRAUGHT
DEFECTS IN THE FLUE
Of all the weather and geographical conditions which affect the
operation of a flue pipe (rain, fog, snow, altitude a.s.l., exposure to
sunlight, direction of facing), the wind is unquestionably the most
decisive. In fact, along with thermal depression caused by the
difference in temperature inside and outside of the chimney, there is
another type of depression or over-pressure: dynamic pressure caused
by the wind. An updraft always increases depression and hence
draught. A crosswind increases depression provided the cowl has been
installed properly. A downdraft always decreases depression, at times
inverting it.
Besides the direction and force of the wind, the position of the flue and
the cowl with respect to the roof of the building and the surrounding
landscape is important.
The wind also influences the operation of the chimney indirectly by
creating high-pressure and low-pressure zones, not only outside the
building but inside as well. In rooms directly exposed to the wind (2),
an indoor high-pressure area can be created which can augment the
draught in stoves and fireplaces, but it can be counteracted by the
external high pressure if the cowl is situated on the side exposed to the
wind (1). On the other hand, in the rooms on the opposite side from
the direction of the wind (3), a dynamic depression can be created
which competes with the natural thermal depression developed by the
chimney, but this can be compensated for (sometimes) by locating the
flue on the opposite side from the direction of the wind (4).
IMPORTANT!
The operation of the pellet stove is noticeably
sensitive to the conformation and position of the flue
which is adopted.
Hazardous conditions can only be overcome by
suitable setting-up of the stove carried out by
qualified MCZ personnel.
1
2 3
4
E.g. Crosswind 2: 8 m/sec
Depression of 30Pa
E.g. Downdraft at 45° of
8m/sec. Overpressure of 17
Pa
1-2 = High-pressure zones
3-4 = Low-pressure zones
WIND
Least favourable points Most favourable position
WIND
Downdraft
High-pressure Low-pressure zone

PELLET STOVES Chapter 3
INSTALLATION AND USE MANUAL page 15
Installation and assembly Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
2.10. PLUMBING CONNECTION
IMPORTANT!
The connection of the stove to the plumbing system
must be carried out ONLY by specialized personnel
who are capable of carrying out installation properly,
in compliance with current standards in the country
of installation.
If installation of the stove will involve interaction
with another, pre-existing system complete with
heating equipment (gas boiler, methane boiler, fuel
oil boiler, etc.), it is even more advisable to call in
qualified personnel, who subsequently will be
responsible for conformity of the system with current
applicable law.
MCZ will not be held responsible for damage to
persons or things in the event of failed or incorrect
operation if the aforementioned warnings are not
complied with.
For connection of the plumbing system to the stove, the user should
refer to chapter 3, INSTALLATION AND ASSEMBLY; specifically,
paragraph 3.4, CONNECTION TO PLUMBING SYSTEM

PELLET STOVES Chapter 3
INSTALLATION AND USE MANUAL page 16
Installation and assembly Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
3. INSTALLATION AND ASSEMBLY
3.1. DRAWINGS AND TECHNICAL CHARACTERISTICS
3.1.1. EGO HYDRO Dimensions
ØØ
3.1.2. STAR HYDRO Dimensions
ØØ

PELLET STOVES Chapter 3
INSTALLATION AND USE MANUAL page 17
Installation and assembly Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
3.1.3. Dimensions of the HYDRO 15-22 version CLUB without domestic hot
water production kit
3.1.4. Dimensions of the HYDRO 22 version CLUB equipped with kit for domestic
hot water production.
ØØ

PELLET STOVES Chapter 3
INSTALLATION AND USE MANUAL page 18
Installation and assembly Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
3.1.5. Dimensions of the HYDRO 15-22 version SUITE without domestic hot
water production kit
ØØ
3.1.6. Dimensions of the HYDRO 22 version SUITE equipped with kit for
domestic hot water production.

PELLET STOVES Chapter 3
INSTALLATION AND USE MANUAL page 19
Installation and assembly Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
3.1.7. Dimensions of the HYDRO 15-22 version MUSA without domestic hot
water production kit
3.1.8. Dimensions of the HYDRO 22 version MUSA equipped with kit for
domestic hot water production.

PELLET STOVES Chapter 3
INSTALLATION AND USE MANUAL page 20
Installation and assembly Technical service - Rights reserved MCZ GROUP S.p.A. - Reproduction prohibited
FOR THE HYDRAULIC PIPE OUTPUT DRAWINGS, SEE
PAGES 31-32
3.1.9. Technical characteristics
Technical characteristics Ego Hydro / Star Hydro
Nominal thermal power 11,6 kW (9976 kcal/h)
Nominal output power (H2O): 10,0 kW (8600 kcal/h)
Minimum output power 3,6 kW (3096 kcal/h)
Minimum output power (H20) 2,5 KW (2150 kcal/h)
Yield at maximum 91,5%
Yield at minimum 96,0%
Temperature of exhaust smoke at maximum 140°C
Temperature of exhaust smoke at minimum 70°C
Particulate/OGC / Nox (13%O2) 11 mg/Nm3 - 3 mg/Nm3 - 168 mg/Nm3
CO at 13%O² at minimum and maximum 0.034 — 0.011%
CO2at minimum and maximum 6.7% – 8.7%
Mass of smoke 9,4 g/sec
Maximum water pressure 2.5 bar - 250 kPa
Recommended draught at Max*** power 0.10 mbar – 10 Pa***
Minimum draft allowed at minimum power 0.00 mbar – 0 Pa
Hopper capacity 37 litres
Fuel pellet type Pellet diameter 6-8 mm. Length range 5-30 mm
Pellet consumption per hour Min ~ 0,8 kg/h * Max. ~ 2,5 kg/h *
Operating time between re-fuelling Al min ~ 36 h * Al max. ~ 10 h *
Heatable volume m3249/40 – 285/35 – 333/30 **
Combustion air inlet External diameter 50 mm.
Smoke outlet External diameter 80 mm.
Air intlet 80 Cm2
Rated electrical power (EN 60335-1) 120 W (Max 420 W)
Power supply frequency and voltage 230 Volts / 50 Hz
Net weight 175 kg
Weight with packaging 185 Kg
Distance from combustible material (rear): 100 mm
Distance from combustible material (sides): 100 mm
* Data that may vary depending on the type of pellets used
** Volume that can be heated, according to the power requirement per m3(respectively 40-35-30 Kcal/h per m3)
***Value recommended by the manufacturer (non-binding) for optimal product operation
Tested according to EN 14785 in accordance with European regulation for Construction Products (EU
305/2011).