Red Heating MALVA HYDRO 12 User manual

INSTALLATION GUIDE GB
PELLET STOVE
MALVA HYDRO 12
PART 1 - REGULATIONS AND ASSEMBLY
Instructions in English

II
TABLE OF CONTENTS
TABLE OF CONTENTS .................................................................................................. II
INTRODUCTION ..........................................................................................................1
1WARNINGS AND WARRANTY CONDITIONS .................................................................2
2INSTALLATION.........................................................................................................9
3DRAWINGS AND TECHNICAL FEATURES....................................................................18
4INSTALLATION AND ASSEMBLY ...............................................................................20
5CLADDING ASSEMBLY.............................................................................................23
6OPENING THE DOOR OF THE FIREBOX ......................................................................26
7INSTALLATION AND ASSEMBLY ...............................................................................27
8LOADING THE PELLETS ...........................................................................................29
9HYDRAULIC CONNECTION.......................................................................................31
10ELECTRICAL CONNECTION.....................................................................................35

1
INTRODUCTION
Technical Dept. - All rights reserved - Reproduction prohibited
Dear Customer,
our products are designed and manufactured in compliance with European reference standards for construction products (EN13240 for
wood-burning stoves, EN14785 for pellet-burning appliances, EN13229 for replaces/wood-burning inserts and EN 12815 for wood-
burning range cookers), with high quality materials and extensive experience in transformation processes. The products also meet the
essential requirements of Directive 2006/95/EC (LowVoltage) and Directive 2004/108/EC (Electromagnetic Compatibility).
To get the best performance, we suggest you read the instructions in this manual carefully.
This installation and use manual forms an integral part of the product: ensure that the manual is always supplied with the appliance, even
if it changes owner. If the manual is lost, you can request another copy from the local Technical Department or download it directly from
the company website.
All local regulations, including those referring to national and European standards, must be observed when installing the appliance.
In Italy, for the installation of systems with biomass below 35KW, refer to ministerial decree D.M. 37/08, and the qualied installation
technician with the appropriate requisites must issue a certicate of compliance for the system installed. (By system we intend
Stove+Flue+Air vent)
REVISIONS TO THE PUBLICATION
The content of this manual is strictly technical and the property of RED.
No part of this manual may be translated into other languages, adapted or reproduced, even in part, in other mechanical or electronic
forms, photocopies, recordings or other, without the prior written authorisation from RED.
The company reserves the right to make changes to the product at any time without prior notice. The proprietary company reserves its
rights according to law.
CARE OF THE MANUAL AND HOW TO CONSULT IT
• Take care of this manual and keep it in an easily and rapidly accessible place.
• Should the manual be misplaced or ruined, request a copy from your Retailer or directly from the Manufacturer, specifying the
product identication data.You can also download it directly from the company website.
• “Bold text”requires particular attention.
• “Italicised text”is used to call your attention to other paragraphs in the manual or for any additional clarications.
• “NOTE”provides the reader with additional information.
SYMBOLS USED IN THE MANUAL
ATTENTION:
Read the corresponding message with care because failure to observe the information provided could
result in serious damage to the product and danger to the persons who use it.
INFORMATION:
failure to comply with these provisions will compromise use of the product.
OPERATING SEQUENCES:
sequence of buttons to be pressed to access the menus or change settings.
MANUAL
carefully read this manual or the relative instructions.

2
1-WARNINGS ANDWARRANTY CONDITIONS
SAFETY PRECAUTIONS
• Installation, electrical connection, operating test and maintenance
must only be carried out by authorised and qualied personnel.
• Installthe product inaccordancewith alllocal andnationallegislation
and regulations in force in the region or state.
• A bad use or unproper maintenance of the product can bring to a
serious risk of explosion in the combustion chamber.
• Only use the fuel recommended by the manufacturer. The product must not be
used as an incinerator. It is strictly forbidden to use liquid fuel.
• Do not put any fuel other than wood pellets in the hopper.
• The instructions provided in this manual must always be complied with to
ensure the product and any electronic appliances connected to it are used
correctly and accidents are prevented.
• This appliance can be used by children aged 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack
of experience and knowledge if they have been given supervision
or instruction concerning use of the appliance in a safe way and
understand the hazards involved. Children must not play with the
appliance. Cleaning and user maintenance shall not be carried out by
children without supervision.
• The user, or whoever is operating the product, must read and fully understand
the contents of this installation guide before performing any operation. Errors
or incorrect settings can cause hazardous conditions and/or poor operation.
• Do not climb on or lean on the product.
• Do not put linen on the product to dry. Any drying racks or the like must be kept
at a safe distance from the product. Fire hazard.
• All liability for improper use of the product is entirely borne by the user and relieves
the Manufacturer of any civil and criminal liability.
• Any type of tampering or unauthorised replacement with non-original spare
parts could be hazardous for the operator’s safety and relieves the company of
any civil and criminal liability.
• Many of the surfaces of the product get very hot (door, handle, glass, smoke

3
1-WARNINGS ANDWARRANTY CONDITIONS
Technical Dept. - All rights reserved - Reproduction prohibited
outlet pipes, etc.). Avoid coming into contact with these parts, without
adequate protective clothing or suitable implements, such as gloves
with thermal protection or“cold handle”operating systems.
• It is forbidden to operate the product with the door open or the glass
broken.
• The product must be powered by an electrical system that is equipped with an
eective earthing device.
• Switch the product o in the event of a fault or malfunction.
• Accumulated unburned pellets in the burner after each “failed start-up” must
be removed before lighting again. Check that the burner is clean and positioned
properly before lighting again.
• Shut the stove down in the event of a breakdown or bad running and
contact the specialised technician immediately.
• Pellets must not be fed manually into the burner – this wrong
behaviour can generate an abnormal amount of unburned gas, with a
risk of explosion in the chamber.
• Accumulated unburnt pellets in the burner after a failed ignitions
must be removed before lighting.
• Failure to clean and maintain the brazier can result in improper running and
explosions within the stove. Make sure you remove and clear the holes in the
brazier and any loose encrustations every time you empty the ash from the
stove or every time you have a failed ignition. Make sure that the holes in the
brazier are never reduced in size as this will aect the safe performance of the
stove if not maintained.
• Do not washtheproduct with water.Water could get insidetheunitanddamage
the electrical insulation and cause electric shocks.
• If there is a re in the ue pipe, extinguish the stove, disconnect it from the
power supply and never open the door.Then contact the competent authorities.
• Do not light the stove with ammable materials if the ignition system breaks
down.
• Do not stand for a long time in front of the product in operation. Do not overheat
the room you are in and where the product is installed.This could cause injuries

4
1-WARNINGS ANDWARRANTY CONDITIONS
and health problems.
• Install the product in a location that does not present a re hazard and is
equipped with power and air supplies and smoke outlets.
• In the event of re in the chimney, turn o the device, disconnect it from the
mains electricity and do not open the hatch. Then contact the competent
authorities.
• The product and the cladding must be stored in a dry place and must not be
exposed to weathering.
• It is recommended not to remove the feet that support the product in order to
guarantee adequate insulation, especially if the ooring is made of ammable
materials.
• In the event of a malfunction of the ignition system, do not force it to light by
using ammable materials.
• Special maintenance must only be performed by authorised and qualied
personnel.
• Assess the static conditions of the surface on which the weight of the product
will rest and provide suitable insulation if it is made of ammable material (e.g.
wood, tted carpet or plastic).
• Live electrical parts: only power the product once it has been fully assembled.
• Disconnect the product from the 230V power supply before performing any
maintenance operations.
• IF ANY SMOKE SPILLAGE IS SEEN WITHIN THE ROOM OR THE APPLIANCE
SUFFERS FROM AN EXPLOSIVE IGNITION PLEASE TURN OFF THE
APPLIANCE, VENTILATE THE ROOM AND CONTACT THE INSTALLER/
SERVICE TECHNICIAN IMMEDIATELY.
INFORMATION
• If there are any issues, contact the retailer or a qualied technician authorised by MCZ. In the event of a repair, request the use of
original spare parts.
• Only use types of fuel recommended by MCZ (for Italy, pellets with a 6 mm diameter and pellets with a 6-8 mm diameter for other
European countries), which must only be loaded with an automatic feed system.
• Periodically check and clean the smoke outlet duct (connection to the ue).
• Accumulated unburnt pellets in the burner after a series of failed ignitions must be removed before lighting it again.
• The pellet stove is not a cooking appliance.
• Always keep the cover of the fuel hopper closed.
• Keep this instruction manual, which will be an integral part of the stove for the whole of its service life. If the product is sold or

5
1-WARNINGS ANDWARRANTY CONDITIONS
Technical Dept. - All rights reserved - Reproduction prohibited
transferred to another user, ensure the manual is also handed over.
• If lost, contact MCZ or the authorised dealer to request a copy.
INTENDED USE
The product only works with wood pellets and must be installed indoors.
WARRANTY CONDITIONS
The rm covers the product,with the exception of the parts prone to normal wear that are listed below, for a period of 2 (two)
years from the date of purchase as proved by:
• a document to serve as proof of purchase (invoice and/or receipt) that shows the name of the vendor and the date on which the
purchase was made;
• forwarding of the completed warranty certicate within 8 days of purchase;
Furthermore, in order for the guarantee to be valid, the device must be installed and calibrated by qualied personnel, and where
necessary, the user must be issued with a declaration of conformity and correct functioning of the product.
We recommend performing a functional test of the product before completion with the relative nishes, if applicable (claddings, painting
of walls, etc.).
Installations that do not meet the current standards, improper use and lack of maintenance as expected by the manufacturer, void the
product warranty.
The warranty is valid on the condition that the instructions and warnings contained in the user and maintenance manual are observed,
and therefore the product is used correctly.
The replacement of the entire system or the repair of one of its components does not extend the warranty period, and the original expiry
date remains unchanged.
The warranty covers the replacement or free repair of parts recognised as being faulty at source due to manufacturing defects.
In the event of a fault, to benet from the warranty, the customer must keep the warranty certicate and provide it with the document
given at the time of purchase to the Service Centre.
EXCLUSIONS
The warranty does not cover malfunctions and/or damage to the appliance that arise due to the following causes:
• Damage caused during transportation and/or handling
• all parts that develop faults due to negligence or improper use, incorrect maintenance, installation that does not comply with the
manufacturer’s instructions (always refer to the installation guide provided with the appliance)
• incorrect sizing with regard to the use or faults in the installation or failure to adopt the necessary devices to guarantee proper
execution
• improper overheating of the equipment, use of fuels not conforming to the types and quantities indicated in the instructions provided
• further damage caused by incorrect user interventions in an attempt to x the initial fault
• worsening of the damage caused by the user continuing to operate the appliance even after the fault has been noticed
• in presence of a boiler, any corrosion, incrustations or breakages caused by water ow, condensation, hardness or acidity of the water,
improperly performed descaling treatments, lack of water, mud or limescale deposits
• ineciency of chimneys, ues or parts of the system aecting the appliance
• damage caused by tampering with the appliance, atmospheric agents, natural disasters, vandalism, electrical discharges, res, faults
in the electric and/or hydraulic system.
• Failure to have the annual stove maintenance performed by an authorised technician or qualied personnel will result in the loss of
the warranty.
Also excluded from this warranty are:
• parts subject to normal wear such as gaskets, glass, cladding and cast iron grilles, painted, chrome-plated or gilded parts, handles
and electric cables, bulbs, indicator lights, knobs, all parts which can be removed from the rebox.
• Variations in colour of the painted or ceramic/serpentine parts and crazed ceramics as they are natural characteristics of the material

6
1-WARNINGS ANDWARRANTY CONDITIONS
and product use.
• masonry work
• plant parts (if present) not supplied by the manufacturer
Any technical interventions on the product to eliminate the above defects and consequent damages must be agreed upon with the
Service Centre, who reserves the right to accept the relative appointment or not. However, said interventions will not be carried out under
warranty but as technical assistance to be granted as part of any eventual and specic agreed conditions and in accordance with the fee
in force for the work to be carried out.
The user will also be charged for any costs incurred to remedy the incorrect technical interventions, tampering or damage to the appliance,
not attributable to original faults.
Save for the legal or regulatory limits, the warranty does not cover the containment of atmospheric and acoustic pollution.
The company declines all liability for any damage which may be caused, directly or indirectly, to persons, animals or objects as
a consequence of non compliance with any provision specied in the manual, especially warnings regarding installation, use
and maintenance of the appliance.

7
1-WARNINGS ANDWARRANTY CONDITIONS
Technical Dept. - All rights reserved - Reproduction prohibited
SPARE PARTS
In the event of a malfunction, consult the retailer who will forward the call to the Technical Assistance Department.
Only use original spare parts. The retailer or service centre can provide all necessary information regarding spare parts.
We do not recommend waiting for the parts to get worn out before having them replaced. It is important to perform regular maintenance.
The company declines all liability if the product and any other accessory is used improperly or modied without
authorisation.
All parts must be replaced with original spare parts.
WARNINGS FORTHE 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 dierentiated waste collection centre set up by the local authorities or to a retailer that provides this service.
Separating and recycling prevents potential negative eects on the environment and health (often caused by inappropriately disposing of
product parts). It also allows materials to be recovered in order to obtain signicant savings in energy and resources.

8
1-WARNINGS ANDWARRANTY CONDITIONS
RULES FOR INSTALLATION
The product in question is a stove that uses wood pellets.
Below is a list of the European regulations regarding the installation of the product:
EN 12828 Heating systems design.
IEC 64-8 Electrical systems with rated voltage not exceeding 1000 V AC and 1500 V DC.
EN 1443 General chimney regulation
EN 1856-1 metal smoke ducts
EN 1856-2 metal smoke extraction channels
EN 1457 chimneys - Interior terracotta / ceramic ues
EN 13384-1 Chimneys - Thermal and dynamic uid calculation methods - Part 1: Chimneys connected to a single appliance
Below are some applicable regulations for Italy:
UNI10683:2012Heatgeneratorsfuelledby woodorothersolidbio-fuels-Test,installation,controlandmaintenance(forthermochemical
power at the rebox lower than 35kW)
UNI/TS 11278 general technical regulation for the choice of smoke duct/ue
UNI 10847:2000 Smoke extractor systems for liquid and solid fuelled generators - Maintenance and control - Guidelines and procedures
UNI 8065 water treatment in civil plants.
UNI 9182 Hot and cold (domestic) water supply and distribution systems.
Installation must be carried out with reference to the diagram of the heating system prepared in accordance with the
standards and local recommendations in force:
In any case, respect:
For the heating system -
Local requirements concerning the chimney connection.
Local requirements for re-ghting standards.
For electrical parts - EN 60335 ‘’Safety of electrical household appliances and similar’’
Part 1 - General requirements
Part 2 - Special regulations for appliances with gas, gas oil and solid fuel burners with electrical connections.

9
2-INSTALLATION
Technical Dept. - All rights reserved - Reproduction prohibited
The instructions in this chapter refer explicitly to the Italian installation regulation UNI 10683. In any case, always
observe the regulations in force in the country of installation.
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 is guaranteed by the lignin contained in the wood itself and allows pellets to be produced without glue or
binders.
The market oers dierent types of pellets with characteristics that vary according to the wood mixtures used. The diameter varies
between 6 and 8 mm, with a standard length ranging from 3 to 40 mm. A good quality pellet has a density of between 600 and 750 or
more kg/metres cubed and a moisture content that accounts for 5 to 8% of its weight.
Pellets have technical advantages besides being an ecological fuel, as the wood residue is used completely, thereby achieving cleaner
combustion than that of fossil fuels.
While good-quality wood has a caloric value of 4.4 kW/kg (15% moisture, after about 18 months of seasoning), whereas that of pellets
is around 4.9 kW/kg. To ensure good combustion, the pellets must be stored in a dry place and protected from dirt. Pellets are usually
supplied in 15 kg bags, therefore, storing them is very convenient.
Good quality pellets guarantee good combustion, thereby decreasing harmful emissions into the atmosphere.
The poorer the quality of the fuel, the more often the internal parts of the brazier and combustion chamber must
be cleaned.
The main quality certications for pellets currently available on the European market guarantee that the fuel complies with class A1/A2
according to ISO 17225-2 (ex EN 14961). These certications include, for example, ENPlus, DINplus, Ö-Norm M7135, and in particular,
guarantee the following characteristics:
• caloric value: 4.6 ÷ 5.3 kWh/kg.
• Water content: ≤ 10% of the weight.
• Percentage of ash: max 1.2% of the weight (A1 less than 0.7%).
• Diameter: 6±1/8±1 mm.
• Length: 3÷40 mm.
• Content: 100% untreated wood without the addition of binding agents (max 5% bark).
• Packaging: in sacks made from ecologically compatible or biologically decomposing material.
The company strongly recommends using certied fuel for its products (ENplus, DINplus, Ö-Norm M7135).
Poor quality pellets or others that do not comply with the characteristics specied previously may compromise the
operation of your product and can therefore make the guarantee and product liability invalid.
BAG OF PELLETS 15 kg

A
B
10
2-INSTALLATION
FOREWORD
The installation position must be chosen according to the room, smoke extraction system and ue. Check with local authorities whether
there are any restrictive regulations in force regarding the combustion air inlet, the smoke outlet system, the ue or the chimney pot.The
manufacturer declines all responsibility in the event of installations that do not comply with the laws in force, incorrect room air exchange,
electrical connection non-compliant with the standards and inappropriate use of the appliance. The installation must be carried out by a
qualied technician, who must issue a declaration of conformity of the system to the purchaser and will assume full responsibility for nal
installation and consequent good operation of the product.
In particular one must ensure that:
• there is a suitable combustion air inlet and smoke outlet in compliance with the type of product installed
• other stoves or devices installed do not cause negative pressure in the room where the product is installed (for sealed appliances only,
a maximum of 15 Pa of negative pressure in the room is allowed)
• when the product is switched on there is no reux of smoke in the room
• smoke extraction takes place in total safety (sizing, smoke seal, distances from ammable materials..).
We especially recommend to check the data tags of the ue for the safety distances that must be observed in presence
of combustible materials and the type of insulating material to be used. These indications must be followed strictly to
prevent serious harm to people and the integrity of the home. The installation of the appliance must ensure easy access to
clean the appliance itself, the smoke outlet pipes and the ue. It is forbidden to install the stove in rooms with a re hazard.
Installation in studio ats, bedrooms and bathrooms is only allowed with sealed or closed appliances equipped with
suitable combustion air ducting directly outside. Always maintain adequate distance and protection in order to prevent
the product from coming into contact with water.
In the event there are several appliances installed, the external air inlet must be sized accordingly.
MINIMUM DISTANCES
It is recommended to install the stove detached from any walls and/or furniture, with a minimum clearance to allow eective aeration
of the appliance and a good distribution of heat in the room. Comply with the distances from ammable or heat-sensitive objects (sofas,
furniture, wood panelling, etc.) as specied below. The frontal distance from ammable materials must be at least as specied in the
product’s technical data table.
If particularly delicate objects are present, such as furniture, curtains or sofas, increase the stove clearance accordingly.
If the oor is made of wood, it is recommended to t a oor protection sheet in compliance with the Standards in
force in the country of installation.
MALVA
HYDRO 12
Non-ammable walls Flammable walls
A = 5 cm
B = 5 cm
A = 20 cm
B = 20 cm
If the oor is made of combustible material, it is recommended to use protection made of non-combustible material (steel, glass...) that
also protects the front from falling combusted material during cleaning operations.
The appliance must be installed on a oor with adequate load capacity.
If the existing construction does not meet this requirement, one must take appropriate measures (for example a load distribution plate).

min.3,5 metri
AT
(A)
AP
(B)
11
2-INSTALLATION
Technical Dept. - All rights reserved - Reproduction prohibited
FOREWORD
The Chimney Flue chapter has been drawn up with reference to the provisions of European Standards (EN13384 - EN1443 - EN1856 -
EN1457).
The chapter provides indications for installing an ecient and correct ue but is under no circumstances to substitute the regulations in
force, which the qualied technician must be in possession of. Check with local authorities whether there are any restrictive regulations in
force regarding the intake of air for combustion, the smoke outlet system, the ue or the chimney pot.
The company declines all liability relating to the poor functioning of the stove if this is due to the use of an insuciently sized ue in
violation of the Standards in force.
FLUE
The ue or chimney is of great importance for the proper operation of a solid fuel-burning heating appliance with natural draught, as
modern heating appliances have high eciency with cooler ue gasses and consequently less draught, it is therefore essential that the
ue is built up to standard and always kept in perfect working order. A ue that serves a pellet/wood fuelled appliance must be at least
category T400 (or greater if the appliance requires so) and resistant to soot res. Smoke must be extracted through a single ue made of
insulated steel (A) or an existing ue that complies with the intended use (B).
A simple air shaft made of cement must be suitably lined. In both solutions there must be an inspection cap (AT) and/or inspection hatch
(AP) - FIG.1.
It is prohibited to connect more than one wood/pellet (*) or any other type of appliance (vent cowling...) to the same ue.
(*) unless there are national derogations (for instance in Germany), which under suitable conditions allow for the installation of several
appliances in the same replace. In any case, strictly follow the product/installation requirements of the relative regulations/legislation
in force in that country
FIGURE 1 - FLUE

ABC
D
E
A
B
C
D
15° E
F
A
B
C
D
E
30°
F
12
2-INSTALLATION
TECHNICAL CHARACTERISTICS
Have the eciency of the ue checked by an authorised technician.
The ue must be sealed against ue gasses, in a vertical direction without narrowing, be made with materials impermeable to smoke,
condensation, thermally insulated and suitable to resist normal mechanical stress over time (we recommend replaces made of A/316
or refractory material with insulated round section double chamber). Be suitably insulated externally to avoid condensation and reduce
smoke cooling. It should be separated from combustible or ammable materials with an air gap or insulating materials: check the distance
specied by the manufacturer of the replace according to EN1443. The chimney opening must be in the same room as the appliance, or
at most in the adjoining room, and have a soot and condensation collection chamber beneath the opening, and be accessible via a sealed
metal hatch.
FLAT ROOF
ROOF AT 15°
ROOF AT 30°
A = 0.50 metres
B = DISTANCE > 2 metres
C = DISTANCE < 2 metres
D = 0.50 metres
E = TECHNICAL VOLUME
A = MIN. 1.00 metres
B = DISTANCE > 1.85 metres
C = DISTANCE < 1.85 metres
D = 0.50 metres ABOVE HIGHEST
POINT
E = 0.50 metres
F = REFLUX AREA
A = MIN. 1.30 metres
B = DISTANCE > 1.50 metres
C = DISTANCE < 1.50 metres
D = 0.50 metres ABOVE HIGHEST
POINT
E = 0.80 metres
F = REFLUX AREA
FIGURE 2
FIGURE 3
FIGURE 4

A
B
D
60°
E
C
FA
B
C
D
E
45°
F
13
2-INSTALLATION
Technical Dept. - All rights reserved - Reproduction prohibited
ROOF AT 60° ROOF AT 45°
SIZING
The negative pressure (draught) of a ue depends on its height. Check the negative pressure with the values indicated in the technical
characteristics.The minimum height of the chimney is 3.5 metres.
The interior cross-section of the ue can be round (best), square or rectangular (the ratio between the internal sides must be ≤1.5) with
the sides joined with a minimum radius of 20 mm. The dimension of the cross-section must be minimum Ø100mm.
The cross sections/lengths of chimneys must be correctly sized in accordance with the general method of calculation of UNI EN13384-1 or
other proven eciency methods.
Below is a list of some ues available on the market:
AISI 316 steel chimney with
double chamber insulated with
ceramic bre or equivalent
resistant up to 400°C.
Refractory chimney with
double insulated chamber and
external lightweight concrete
cladding with cellular material
such as clay.
Traditional square-section clay
chimney with insulating empty
inserts.
Avoid products with an internal
rectangular section where the
larger side is 1.5 times the
smaller side (e.g. 20x40 or
15x30).
EXCELLENT GOOD POOR VERY POOR
A = MIN. 2.60 metres
B = DISTANCE > 1.20 metres
C = DISTANCE < 1.20 metres
D = 0.50 metres ABOVE HIGHEST
POINT
E = 2.10 metres
F = REFLUX AREA
A = MIN. 2.00 metres
B = DISTANCE > 1.30 metres
C = DISTANCE < 1.30 metres
D = 0.50 metres ABOVE HIGHEST
POINT
E = 1.50 metres
F = REFLUX AREA
FIGURE 5 FIGURE 6

1
9
9
2
3
4
5
6
7
8
9
14
2-INSTALLATION
MAINTENANCE
The ue must be kept clean, since the deposit of soot or unburned oils reduces the cross-section reducing the draught and thus
compromising the ecient operation of the stove and, if large build-ups accumulate, can catch re. The ue and chimney pot must be
cleaned and checked by a qualied chimney sweep at least once a year. Once the inspection/maintenance has been performed, request a
written report that the system is safe.
Failure to perform cleaning jeopardises the system’s safety.
CHIMNEYPOT
The chimney pot is a crucial element for the heating appliance to work properly: we recommend a wind proof chimney pot (A), see
Figure 7. The area of the opening for smoke extraction must be at least double the cross-section of the ue/lined system, and arranged
so that smoke outlet is ensured even in
strong wind. The chimney must prevent
rain, snow or animals from entering the
chimney. The height of outow into the
atmosphere must be beyond the reux
area due to the shape of the roof or any
obstacles near the outlet (see Figures 2-3-
4-5-6).
CHIMNEY COMPONENTS
LEGEND:
(1) CHIMNEYPOT
(2) REFLUX CHANNEL
(3) SMOKE DUCT
(4) THERMAL INSULATION
(5) OUTSIDE WALL
(6) CHIMNEY FITTING
(7) SMOKE DUCT
(8) HEAT GENERATOR
(9) INSPECTION ACCESS PANEL
FIGURE 7
FIGURE 8

A
B B
A
C
MIN.1,5 m MIN.1,5 m
MIN.1,5 m
MIN.0,3 m
15
2-INSTALLATION
Technical Dept. - All rights reserved - Reproduction prohibited
FIGURE 9 A - DIRECTLY FROM OUTSIDE
FIGURE 10
FIGURE 9 B - INDIRECTLY FROM THE ADJACENT ROOM
A=AIR INLET
B=ROOM TO BE VENTILATED
C=INCREASE OF THE GAP UNDER THE DOOR
EXTERNAL AIR INLET
It is mandatory to provide an adequate external air inlet that supplies the combustion air required for the product to work properly. The
ow of air between the outside and the installation room may be direct, through an inlet in an external wall of the room (preferable
solution see Figure 9 a); or indirect, via air intake from adjoining rooms and connecting permanently with the installation room (see Figure
9 b). Adjoining areas may not include sleeping areas, garages or general areas with a re hazard. During installation one must check the
minimum clearances required for air intake from outside. Take into account the presence of doors and windows that could interfere with
the proper ow of air to the stove (see diagram below).
The air inlet must have a minimum net total area of 80 cm2: the surface must be increased accordingly if there are other active generators
(for example: electric fan for stale air extraction, hood, other stoves, etc.), which could cause a depression in the room. Make sure that,
with all appliances on, the pressure drop between the room and the outside does not exceed the value of 4 Pa (also for Oyster appliances
if the combustion air has not been suitably ducted outside). If necessary increase the intake section of the air inlet, which must be made
at oor level and always protected with a bird-proof outer protection grid and in such a way that it cannot be obstructed by any object.
It is possible to connect the air required for combustion
directly to the outside air inlet, with a pipe of at least
Ø50mm, with maximum length of 3linear metres;
each pipe bend shall be considered equivalent to a
linear metre. To attach the pipe see the back of the
stove.
For stoves installed in studio ats, bedrooms and
bathrooms (where allowed), it is mandatory to
connect the combustion air outside. In particular for
sealed stoves the connection must be sealed in order
not to compromise the overall sealed characteristic of
the system.

16
2-INSTALLATION
DISTANCE (metres) The air inlet must be at a distance of:
1.5 m BELOW Windows, doors, smoke outlets, cavities, ....
1.5 m HORIZONTALLY Windows, doors, smoke outlets, cavities, ....
0.3 m ABOVE Windows, doors, smoke outlets, cavities, ....
1.5 m AT A DISTANCE from smoke outlet
CONNECTION TO THE FLUE
The connection between the ue and the appliance must be via a smoke duct that conforms to EN 1856-2. The connecting section must
extend no more than 4 m horizontally, with a minimum slope of 3% and with a maximum of 3 90% bends (accessible for inspection - do
not count theT tting at the appliance outlet).
The diameter of the smoke duct must be equal to or greater than that of the outlet of the appliance (Ø 80 mm).
TYPE OF SYSTEM SMOKE DUCT
Minimum vertical length 1.5 metres
Maximum length
(with 1 accessible 90° bend)
6.5 metres
Maximum length
(with 3 accessible 90° bends)
4.5 metres
Maximum number of accessible 90° bends 3
Horizontal sections
(minimum slope 3%)
4 metres
Use a smoke duct according to the regulations in force in the country of installation and verify that it is compatible with the product and
installation characteristics.The temperature class of the smoke duct must exceed operating temperatures of the appliance.
It is prohibited to connect more than one appliance to the same smoke duct, or the discharge from hoods above it. It is forbidden to extract
the combustion products directly through the wall, whether into indoor spaces or outdoors.
Should there be ammable or heat-sensitive structures, the smoke duct must respect the safety distances specied in the data plate.

T
I
S
I
U
B
A
P
U
I
I
C
4
3
D
2
I
E
V
U
1
F
17
2-INSTALLATION
Technical Dept. - All rights reserved - Reproduction prohibited
EXAMPLES OF CORRECT INSTALLATION
1. Installation of Ø120mm ue with hole for the passage
of the pipe increased by:
minimum 100mm around the pipe if next to non
ammable parts such as cement, brick, etc.; or
minimum 300mm around the pipe (or as required by
rating plate) if next to ammable parts such as wood etc.
In both cases, install suitable insulation between the ue
and the ceiling.
Always check and respect the data tags on the ue,
in particular the minimum safety distances from
combustible materials.
The previous rules also apply for holes made in walls.
2. Old ue, minimum pipe Ø100mm with the inclusion of
an external access door for chimney cleaning.
3. External ue made of insulated stainless steel pipes,
i.e. with double walls minimum Ø100mm: all securely
mounted on the wall. With windproof chimney pot. See
g. 7 type A.
4. Ducting system using T ttings that allow easy access
for cleaning without having to remove the pipes
FIGURE 11
U = INSULATING
V = ANY REDUCTION FROM 100 TO 80 MM
I = INSPECTION CAP
S = INSPECTION ACCESS PANEL
P = AIR INLET
T = T JOINT WITH INSPECTION CAP
A = MINIMUM 40 MM
B = MAXIMUM 4 M
C = MINIMUM 3°
D = MINIMUM 400 MM
E = HOLE DIAMETER
F = SEE FIG.2-3-4-5-6

1036
498
525 68
Ø80
Ø50
229
155
198
352
Ø80
Ø50
18
3-DRAWINGS AND TECHNICAL FEATURES
DRAWINGS AND CHARACTERISTICS
STOVE DIMENSIONS MALVA HYDRO 12