Moretti Design MONODESIGN 60 User manual

1
USE AND MAINTENANCE
MANUAL
MONODESIGN 60 - 70 - 80 - 90 - 120
LATODESIGN 60 RH - 90 RH
LATODESIGN 60 LH - 90 LH
TRIODESIGN 90
WOOD

3
4
4
5
6
6
8
11
12
12
12
12
13
14
15
16
16
16
17
17
18
18
21
21
22
22
23
23
23
26
27
27
28
28
28
29
30
31
32
32
33
33
34
TABLE OF CONTENTS
1 - Introduction
2 - General warnings
3 - Warranty conditions
4 - Technical and dimensional characteristics
4.1 - Technical characteristics
4.2 - Technical Drawings
5 - Safety warnings
6 - Product identification and technical characteristics
7 - Installation
7.1 - Waste disposal
7.2 - Unpacking and sliding unit movement
7.3 - Minimum safety distances
7.4 - Flue pipe connection
7.5 - The chimney
7.6 - Air intakes
7.6.1 - Natural convention air intake (OPTIONAL art. MORKRX)
7.6.2 - Primary air intake (OPTIONAL art. MORKERM)
7.6.3 - Intakes for heating air
7.6.4 - Decompression nozzle
7.7 - Installation of ventilation kit (OPTIONAL item MORKV720)
7.7.1 - Assembly phases
7.7.2 - Centrifugal fan
7.7.3 - Air grilles
7.7.4 - Hot air ducting
7.7.5 - Control unit
7.7.6 - Installation of thermostatic probe
7.7.7 - Control unit electrical connections
7.8 - Positioning of the fumes deflectors
7.8.1 - Removing the upper deflectors
8 - Use and maintenance of the firebox
8.1 - Recommended fuels
8.2 - Air registers
8.2.1 - Combustion air register
8.2.2 - Combustion air register - FIRE TECH MODE
8.3 - First ignitions
8.4 - Sliding door adjustment
8.5 - Daily use
8.6 - Cleaning and Maintenance
8.6.1 - Daily operations
8.6.2 - Cleaning of the fire pit
8.6.3 - Cleaning of the glass
8.6.4 - Supplied keys (cold hand)

4
1 - INTRODUCTION
Dear customer, thank you for choosing a MORETTI DESIGN product, a cutting-edge product in the field of wood-
burning fireplaces for heating. The great attention to detail during the design phase, the use of advanced technology,
the quality of the materials and the extreme care taken during the processing phase, are the best guarantee of an
efficient, functional, safe and suitable product to fully meet your heating needs.
Moretti DESIGN vented fireboxes are made in compliance with current standards, in accordance with the provisions
of the EN 13229 directive, using certified components, checking the appliance for safety and functionality, and car-
rying out the checks required by law. Moretti is in line with European legislation that allows each product to bear the
CE marking.
For a correct installation of the appliance, for its optimal and safe use and for suitable maintenance, we invite you to
read this manual very carefully, paying particular attention to the warnings below.
2 - GENERAL WARNINGS
This manual has been prepared to allow simple and safe use of the appliance, and is an integral part of MORETTI
DESIGN vented fireboxes; therefore, it is recommended to store it carefully and to always keep it near the appliance
so that it can be consulted when necessary. In case of loss or damage, ask your dealer for a copy.
Installation and maintenance must be carried out by qualified personnel, in compliance with the relevant regulations
and laws in force. All local regulations, including those referring to national and European standards, must be re-
spected when installing and using the appliance.
When installing the firebox, it is mandatory to pay the utmost attention to the instructions provided in this manual.
The installer will assume full responsibility for the final installation and subsequent proper functioning of the installed
product.
For the ordinary operation of the fireplace, the user must apply all the indications obtained from a thorough reading
of this manual. To get started, it's important to know that:
• It is forbidden to install the firebox in environments such as garages, warehouses of combustible material, envi-
ronments at risk of fire or with an explosive atmosphere, rooms where there are liquid fuel heating appliances that
withdraw the vented air from the same room, or in environments where there are type B gas appliances intended
for heating.
• The vented firebox as an incinerator or in any other manner other than that for which it was designed for. No fuel
other than those expressly recommended in this manual should be used. It is absolutely forbidden to use liquid
fuels.
• Some surfaces of the hearth, especially the glazed area, are subject to severe overheating and can cause serious
burns on touch alone. For this reason, together with the fireplace, a special handle is provided for handling the
door and levers. In the absence of the handle, use a special protective glove.
• The use of the firebox by children or persons with reduced physical, sensory and mental capabilities is prohibited,
unless they are supervised and instructed in the use of the appliance by a person responsible for their safety.
Children should be supervised to make sure they are not playing with the appliance.
• Do not perform any unauthorized modifications to the hydro stove. Only use original spare parts recommended by
the manufacturer.
MORETTI FIRE srl is not responsible for the failure of the customer or the installer to comply with the in-
structions, obligations and prohibitions contained in this manual. Any liability of the manufacturer for dama-
ge to persons, animals or property resulting from incorrect installation, incorrect and/or approximate main-
tenance or improper use of the product, not in accordance with the purposes for which it was built, is exclu-
ded.

5
3 - WARRANTY CONDITIONS
The consumer (user of the goods for private use) is the holder of the rights provided for by the Consumer Code - Le-
gislative Decree 206/2005 articles 128-15 (implementation of Directive 1999/44/EC of 25/05/99) and this does not
affect these warranty rights.
The company guarantees the product, with the exception of elements subject to normal wear and tear, for a pe-
riod of 2 (two) years from the date of purchase, which is proven by:
• A supporting document (invoice and/or tax receipt) showing the name of the seller and the date on
which the sale was made.
• Product registration on the website www.morettidesign.it/registrazione-prodotto/
In addition, to make the warranty valid and operational, the installation and commissioning of the appliance must be
carried out exclusively by qualified personnel, who in the cases provided for must issue the user with a declaration of
conformity of the system and proper operation of the product.
If defects of conformity are detected within 2 (two) years of purchase, the seller undertakes to repair the product.
The seller will restore the conformity of the product within a reasonable period of time, taking into account the nature
of the product, the purpose for which it was purchased and the methods to be adopted to restore conformity.
The right to resolve of any non-conformities is not applicable in the following situations:
• failure to comply with the installation and use requirements;
• accidental causes and negligence of the buyer;
• modifications or repairs carried out by unauthorised personnel;
• improper maintenance;
• operation or storage not within the environmental conditions specified for the product;
• damage caused by anomalies on the electrical system, by atmospheric phenomena or by any other cause exter-
nal to the product;
• use in conjunction with accessories not marketed by the seller and/or parts not designed to be used with the pro-
duct.
Parts and materials subject to wear and tampering are excluded from the warranty. Masonry works of any kind, inclu-
ding those for disassembling and reassembling the product, are excluded. In the event of a malfunction, the firebox
will not be replaced but repaired. Moretti Design shall not be held responsible for incorrect assembly or unauthorised
tampering and interventions.
Installations that do not comply with current regulations void the product warranty, such as improper use and non-
maintenance as provided by the manufacturer
Objects NOT covered by warranty
• Iron and vermiculite deflectors;
• Glass;
• Thermostatic probe;
• Centrifugal fan;
• Cast iron slabs;
• Refractory ceramic;
• Control unit if it is opened or tampered with;
• Labour of all kinds;
•

6
4 - TECHNICAL AND DIMENSIONAL CHARACTERISTICS
4.1 Technical characteristics
WARNING: For installation without a ventilation kit, the flue must be positioned at a minimum height greater
than or equal to 21 cm between the support surface and the fire surface. (see page 7)
VENTILATION KIT ART. MORKV720 (OPTIONAL)
WARNING: For the installation of the ventilation kit, MORKV720 (optional), the flue must be positioned at a
minimum height greater than or equal to 36 cm between the support surface and the fire surface. (see page
7)
Description U.M. MONODESIGN LATODESIGN TRIODESIGN
90
60 70 80 90 120 60 RH 60 LH 90 RH 90 LH
Thermal power input kW 19.50 21.80 23.00 24.60 24.60 19.50 19.50 24.60 24.60 24.60
Nominal thermal power kW 17.00 19.00 20.00 21.40 21.40 17.00 17.00 21.40 21.40 21.40
Yield %87.00 87.00 87.00 87.00 87.00 87.00 87.00 87.00 87.00 87.00
CO (13% O2) at nominal power mg/m3 290.00 498.00 498.00 498.00 498.00 290.00 290.00 498.00 498.00 498.00
Exhaust gas temperature C° 198.10 210.30 216.40 225.00 225.00 198.10 198.10 225.00 225.00 225.00
Primary particulate (13% O2)mg/m3 10.0 15.0 15.0 15.0 15.0 10.0 10.0 15.0 15.0 15.0
NOx (13% O2) at nominal
power
mg/m3 79.00 79.00 79.00 72.00 72.00 79.00 79.00 72.00 72.00 72.00
OGC (13% O2) at nominal
power
mg/m3 19.1 29.0 29.0 29.0 29.0 19.1 19.1 29.0 29.0 29.0
Lena consumption Kg/h 4.59 5.15 5.43 5.81 5.81 4.59 4.59 5.81 5.81 5.81
Forced draft Pa 10 10 10 10 10 10 10 10 10 10
Weight Kg 230 245 280 280 290 210 210 280 280 300
Fumes outlet tube mm 202 202 202 202 202 202 202 202 202 202
Primary air inlet duct mm 80 80 80 80 80 80 80 80 80 80
DEC. 186 - 5 Stars 5 Stars 5 Stars 5 Stars 5 Stars 5 Stars 5 Stars 5 Stars 5 Stars 5 Stars
Eco Design - A+ A+ A+ A+ A+ A+ A+ A+ A+ A+
Fuel WOOD LOGS
Minimum distance from flam-
mable and non-flammable
materials
Lateralmm 450 450 450 450 450 450 450 450 450 450
Frontmm 800 800 800 800 800 800 800 800 800 800
Rearmm 450 450 450 450 450 450 450 450 450 450
Description U.M. MONODESIGN LATODESIGN TRIODESIGN
90
60 70 80 90 120 60 RH 60 LH 90 RH 90 LH
Nominal electrical power kW 75 75 75 75 75 75 75 75 75 75
Nominal voltage V230 230 230 230 230 230 230 230 230 230
Nominal frequency Hz 50 50 50 50 50 50 50 50 50 50

7
MINIMUM DISTANCE WITH VENTILATION KIT INSTALLATION
ART. MORKV720 (OPTIONAL)
MINIMUM DISTANCE WITHOUT INSTALLATION OF VENTILATION KIT
(WITH STANDARD FOOT)
360
210
Accessory not supplied. Place a thickness of the
height of 150mm to position the MORKV720 venti-
lation kit box

8
4.2 Technical drawings
MONODESIGN 60
MONODESIGN 70
MONODESIGN 80

9
MONODESIGN 90
MONODESIGN 120
LATODESIGN 60 RH

10
LATODESIGN 90 LH
LATODESIGN 60 LH
LATODESIGN 90 RH

11
TRIODESIGN 90
5 - SAFETY WARNINGS
1. WARNING!!! For the correct use of this appliance and its electrical components, the instructions given in this
manual must always be observed.
2. WARNING!!! This appliance CANNOT be used on a shared flue
3. WARNING!!! Installation, electrical connections, verification of operation, maintenance and repairs are ope-
rations that must be carried out exclusively by qualified personnel
4. WARNING!!! This appliance must only be used for the purpose for which it was designed and built.
5. WARNING!!! In the event of a fire in the flue, it is necessary to turn off the appliance, closing the combustion
air intake and calling the Fire Department, then also check that the smoke channel and the flue have no visi-
ble damage. Perform a repair before reactivating the combustion plant.
6. WARNING!!! During combustion, the fireplace door can only be opened when there is an embers bed and
not on a high flame to avoid fumes leaking into the environment.
7. WARNING!!! It is important not to light the fire near the glass to avoid its deterioration (whitening). It is advi-
sable to always stay inside the log guard.
8. WARNING!!! Never use flammable liquids (alcohol, nitro or gasoline) to accelerate the ignition of a wood fire:
it is extremely dangerous. Alcohol or petrol vapours can easily catch fire and run the risk of serious burns.
9. WARNING!!! It is not allowed to load a greater weight of wood into the combustion chamber that what is indi-
cated in paragraph 4.1 (technical characteristics).
10. WARNING!!! During operation, some surfaces of the appliance may reach high temperatures, therefore it is
advisable to take the appropriate precautions especially in the presence of children, the elderly and the di-
sabled.
11. WARNING!!! Refractories inside the combustion chamber may turn black during ignition and in the first
hours of operation, they will clean up later during normal operation.
12. WARNING!!! It is forbidden to wash the product with jets of water.
13. WARNING!!! The door should be opened slowly, holding it in place for a few seconds as soon as it is lifted
before fully opening.
14. WARNING!!! Unpleasant smells may occur during the first lighting of the fireplace. Air the room for a few
hours.
15. WARNING!!! It is forbidden to operate the appliance with the door open, without the glass or with the damaged glass
to avoid accidental smoke leakage into the environment.

12
6 - PRODUCT IDENTIFICATION AND TECHNICAL CHARACTERISTICS
The standard range of MORETTI DESIGN vented burners includes 14 different models. To allow the identification of
the model and the related technical data, a plate like the one shown below is placed on each firebox.
The plate is located on the upper side of the sliding unit
front, and contains the model identification code, the se-
rial number, the main technical data, the minimum safety
distances and the reference regulations.
To avoid that, once the covering of the firebox has been
installed, the absence of inspections makes it difficult for
the end user to read the serial number (useful for exam-
ple during maintenance by the technical assistance for
any order of spare parts), it is advisable to note the serial
number and the identification code of the model on the
manual.
It is absolutely forbidden to modify or alter the identifica-
tion plate in any way.
7 - INSTALLATION
Before installing the firebox, it is essential to check the load capacity of the floor. The appliance must be mounted on
flooring with adequate bearing capacity and if an existing construction does not meet this preliminary condition, ap-
propriate measures must be taken (for example, placing the firebox above a load distribution plate). To check the
weight of the firebox, refer to the data shown on the identification plate, or to the table containing the technical speci-
fications in Appendix I of this manual.
All local regulations, including those referring to national and European standards, must be respected at the time of
installation of the appliance. The firebox must be installed by qualified and authorised personnel, in compliance with
Ministerial Decree no. 37 of 22 January 2008.
Before installing the firebox, make sure that the chosen place meets the characteristics required by the manufactu-
rer, which will be indicated below, and by current regulations with particular reference to minimum safety distances.
7.1 - WASTE DISPOSAL
The products that make up the packaging are neither toxic nor harmful, therefore they do not require particular dispo-
sal processes. The management of packaging residues, which may include storage, disposal or possibly recycling,
will be the responsibility of the user, in accordance with the regulations in force in the countries where the operation
is carried out.
Warning: do not leave the elements of the packaging within reach of children because they are potential
sources of danger.
7.2 - UNPACKING AND SLIDING UNIT MOVEMENT
At the time of delivery, the firebox is anchored on a wooden pallet and wrapped in a heat-shrinking nylon cover. The
firebox is equipped with 1 (one) hook that allows the insertion of a carabiner for lifting and moving from the ground
(fig. 1); the chains or any accessories used for this type of movement must be suitable to support the weight of the
firebox.
All handling operations must be carried out by two or more persons, in accor-
dance with current regulations, and with suitable means. It is recommended
to carry out each procedure with extreme caution (do not tilt to avoid tipping,
perform slow and gradual movements, etc.), making sure that there are no
unskilled persons in the range of action.
Fig. 1
Hooking hole

13
Sliding unit movement
To allow the sliding unit to be closed, unscrew the door locking screw (fig. 2) only on the MONODESIGN
60, 70, 80, 90 & 120 models
Fig. 2
The door locking screw prevents any vibrations
during the transport of the firebox from causing
the glass to break. The door locking screw is
indicated on the firebox by a special label.
After removing the locking screw, check the
correct sliding of the sliding door. In case of
sliding problems, report it immediately to your
dealer or installer.
7.3 - MINIMUM SAFETY DISTANCES
When installing the firebox, it is mandatory to respect certain minimum safety distances. In particular:
• the firebox must always be installed at least 5 cm from the surrounding walls;
• the flue must protrude about 20 cm from the ceiling (if it is already present in the house);
In the event that the firebox is installed near flammable materials, the following minimum safety distances
must be respected:
• FLAMMABLE WALLS: if you want to install the firebox near flammable walls, it is necessary to insu-
late the wall itself with an insulating material with a thickness of at least 10 cm (e.g. against a fire-
proof plasterboard wall with rock wool). The firebox must be placed at a distance of at least 5 cm
from the fireproof wall;
• FLAMMABLE CEILING: if the ceiling is made of flammable material (e.g. wooden beams), it is neces-
sary to create a false ceiling with thermal insulation that is at least 10 cm thick; the chimney must ne-
cessarily protrude about 20 cm from the false ceiling.
• FLAMMABLE FLOOR: if the floor is made of flammable material, it is necessary to insulate it with a
thickness of non-flammable material of about 3 cm.
•
Unscrew the
unlocking
It is forbidden to place flammable ob-
jects (e.g. carpets, wooden furniture,
flammable liquids, fire-lighting pro-
ducts, etc.) in the radiating area of the
fireplace, i.e. within one metre of the
sliding door.
It is forbidden to fix or place any type
of material on the walls of the firebox
(e.g. plasterboard, marble, adhesive
tapes, etc.). It is absolutely forbidden
to place, in any way, covering on the
structure of the firebox, including the
front of the appliance.
A minimum space of at least 5 cm
must be left between the covering and
the front of the firebox: this will allow
the normal expansion of the fireplace
structure over an open fire, thus avoi-
ding damage to the covering and/or
the firebox itself.
Fig. 3
Insulation material, 10 cm thickness
Minimum distance 5 cm from the sides and back

14
In the event that local, regional or supervening national regulations impose compliance with greater safety distan-
ces, or more stringent requirements in general, the installation must take place in compliance with the latter.
In any case, the responsibility for the works carried out in the firebox installation space is borne by the end user of
the appliance, who is also entrusted with the verification of the proposed installation solutions.
Moretti Design srl is not responsible for damage to persons, animals or property resulting from failure to comply
with the safety distances indicated above, or for installations that do not comply with local, regional, national and
European regulations.
INSULATION CHARACTERISTICS:
• Type: light insulation plates in calcium silicate for high temperature
• Density: 245 Kg/m3
• Thickness: 10cm
• Fire incombustibility
7.4 - FLUE PIPE CONNECTION
For connection to the flue pipe, we recommend the use of stainless steel pipes made in compliance with
current regulations, and with a maximum inclination of 45°.
It is FORBIDDEN to use flexible metal pipes and/or fibre-cement for the connection of the flue pipe.
A flue with insulated stainless steel pipe with material resistant to temperatures of about 400°C (high density rock
wool) is recommended. Insulation by expanded clay is prohibited.
The flue pipe must have a height and section such as to guarantee an optimal depression in order to dispose of the
mass of fumes resulting from combustion. A vertical trend must be maintained, minimising curves, whose maximum
inclination cannot in any case be greater than 45°. Bottlenecks and section changes capable of producing turbulen-
ce and pressure drops must be avoided. It must have airtight connections between the various elements which ma-
ke up the fumes channel, so as to ensure the seal of the fumes.
The flue pipe must have a preferably round section in order to minimise pressure drops and facilitate the evacuation
of fumes. If a duct with a square or rectangular section is used, it is preferable that the edges are rounded with a
ratio between the sides of 1.5. The internal walls must be smooth and impermeable, in order to avoid the deposit of
unburned materials and the absorption of condensation.
The section of the flue pipe for an ideal forced draft (about 10 Pascal) varies according to different parameters,
including the height of the flue pipe itself, the power of the fireplace, the presence of curves, the length of the sub-
horizontal sections and the height above sea level. Connect the flue pipe with stainless steel pipes of equal section
to the flue pipe (see Technical characteristics in par. 4.1) perfectly sealing the fitting itself.
Each flue pipe must be placed at the service of a single system. It is therefore forbidden to connect the firebox to a
flue already connected to other appliances.
Contact between the flue pipe and flammable or combustible materials must be avoided, either through the use of
suitable insulating materials or through the creation of an air gap.
Check the outlet of the flue pipe on the roof: the length of the flue must exceed the top of the roof by at least 50 cm.
In the case of side-by-side flue pipes, one flue pipe must exceed the other by at least 50 cm.
WARNING: In the event of a fire in the flue pipe, it is necessary to extinguish the fireplace and call the Fire
Department. After extinguishing the fire, check that the flue pipe has no visible damage. Before turning on
the fireplace again, make the necessary repairs.
INFO: A too wide opening of the flue pipe leads to a decrease in the speed of the fumes, a greater accumu-
lation of unburned substances on the walls, favours the cooling of the fumes and the formation of acid con-
densation along the walls, considerably slowing down the ignition of the wood and the combustion. On the
contrary, an undersized section causes the accumulation of fumes in the combustion chamber due to the
inability of complete disposal, leading to the extinguishing of the flame and the suffocation of the combu-
stion itself.
MORETTI DESIGN only guarantees the materials of its own production and declines all responsibility if the
instructions provided in the manual are not respected. Figures 8-9-10 and Table 1 indicate the measures to
be respected in the installation of the flue pipe.

15
7.5 - THE CHIMNEY
The chimney allows the forced draft of the fireplace, that is, the evacuation of fumes. When we talk about the
height of the chimney, we refer to the evacuation rings, excluding the size of the final rain cap.
A suitable dimensioning of the chimney is essential for a correct forced draft. In this regard, the useful outlet sec-
tion of the chimney must not be less than twice the section of the flue pipe, while the internal section must be iden-
tical to that of the fireplace. The chimney must also be easily inspected in order to facilitate maintenance and clea-
ning.
The chimney is also intended to protect the flue pipe and the entire fireplace from rainwater and must be able to
continue to perform its function even in the presence of wind from all directions. The images below show the cor-
rect positions of the chimney (Figures 3-4-5 and Table 1).
Fig. 3
Fig. 4
Fig. 5
YES
YES YES
YES
YES NO NO NO
NO
NO
RIDGE LINE
RIDGE LINE
50 cm over the ridge
RIDGE AXIS

16
Table 1
αAHZ
Roof slope
Distance between
roof axis (ridge) and
upstream side of the
chimney
Minimum height out-
let from the roof(h
minimum)
Reflux zone height
15° 1.85 m 1.00 m 0.50 m
30° 1.50 m 1.30 m 0.80 m
45° 1.30 m 2.00 m 1.50 m
60° 1.20 m 2.60 m 2.10 m
7.6 - AIR INTAKES
7.6.1 - NATURAL CONVENTION AIR INTAKE
(OPTIONAL art. MORKRX)
According to current legislation, all appliances must be equip-
ped with air intake ducts to the firebox with adequate dimen-
sions to ensure efficient and complete combustion.
The appliance is designed to perform two functions: to generate
hot air by means of the "Natural Convection" or "Forced Ventila-
tion" system and at the same time to replenish the oxygen con-
sumed during combustion. The absence of a sufficient inflow of
combustion air from the outside that replenishes the oxygen
burned during the normal combustion of wood, causes the con-
sumption of oxygen inside the place of installation of the ap-
pliance and can therefore be a source of danger for people. In
addition, the lack of combustion air can cause poor combustion
and difficulties in the evacuation of fumes.
For the suction of external air, the appliance is equipped with 4
inlets Ø 12 cm (use only 2) no. 2 located on the back and no. 2
on the sides of the appliance for natural convection (see figure
6).
To allow the passage of aluminium flexible pipes to the outside
(or to a sufficiently ventilated environment), two holes must be
drilled in the wall that communicate with the outside (see figures
6 and 7). Place the appliance at a distance of about 15 cm from
the wall (or the protective structure, if the walls are flammable)
Adjust the height and levels using the adjustable feet (with a 17
mm hex key), which are accessible from outside the appliance.
Fig. 6
Fig. 7
Insert the two sections of aluminium flexible pipe into the holes previously made and cut them facing the outer
wall. Mount the two PVC grilles on the aforementioned hoses; the use of the air intakes provided ensures safe and
energy-efficient operation.
WARNING: Regularly check that the air intakes are not obstructed (through each grid, an air passage of at
least 170 cm² for natural convection appliances and 100 cm² for forced ventilation appliances must be
guaranteed).
7.6.2 - PRIMARY AIR INTAKE (OPTIONAL art. MORKERM)
The appliance can also be installed with only the primary air ducting. Place the joint behind the appliance and in-
sert the 8 cm length of aluminium flexible pipe, securing it with a hose clamp.

17
Fig. 8
Drill two holes in the wall communicating with the outside (or
with a sufficiently ventilated environment): one suitable for the
passage of the 8 cm aluminium flexible pipe and another 15 cm
in diameter inside the support structure (see figure 8). After cor-
rectly positioning the appliance as described above, insert the
manifold into the section of aluminium flexible pipe and secure it
with a hose clamp, then insert the section into the hole pre-
viously made. Finally, mount the two PVC grilles, one on the 8
cm diameter flexible pipe and the other on the 15 cm diameter
hole.
Precise installation and testing techniques are necessary in or-
der to guarantee the optimal thermal performance of the ap-
pliance (consumption, efficiency, emissions), in accordance
with the technical data declared and certified by the approval
laboratory. Excessive forced draft with respect to the specifica-
tions can cause defective operation with excessive fuel consu-
mption, overheating of the structure and annoying noises in the
combustion chamber.
WARNING: It is forbidden to take the combustion air from environments such as garages, warehouses of
combustible material, environments at risk of fire or with an explosive atmosphere, rooms where there
are liquid fuel heating appliances that withdraw the vented air from the same room, or in environments
where there are type B gas appliances intended for heating.
If in the room where the fireplace is installed there are suction hoods or other extraction fans, these must not be
in operation when the fireplace is lit. Failure to do so may result in malfunctions or smoke escaping into the room.
7.6.3 - INTAKES FOR HEATING AIR
For forced ventilation with the MORKV720 kit (optional) the motor box for heating air inlets of diameter Ø=120
mm (see figure 9-a) located one on the right and the other on the left. It is necessary to connect the two related
sections of aluminium flexible pipe to the aforementioned intakes and secure them with 2 hose clamps.
In the event that it is not possible to create a second external air intake for the heating air, it is possible to con-
nect one intake of the motor box to an internal air intake, while the other intake must be closed. This solution is
allowed solely and exclusively where the installation of the optional centrifugal fan is not provided.
In no case should the air intakes of the engine box be left open, to prevent the combustion air from the external
air intake from being sucked from them.
7.6.4 - DECOMPRESSION NOZZLE
In addition to the external air intake, a heat recovery grille (decompression nozzle) must be made on the firebox
covering. The grille allows the heat that accumulates inside the covering to escape, ensuring both protection
against excessive overheating in the firebox cavity and the recovery of otherwise unused heat. The nozzle must
be made at a distance of about 50 cm from the ceiling and must be positioned at the top of the fireplace hood,
compulsorily on the covering made, and must not be connected to any pipes (figure 9-b).
Fig. 9-b
DECOMPRESSION
NOZZLE
FIREBOX
OUTDOOR/INDOOR
AIR INTAKE TUBE
Fig. 9-a

18
7.7 - INSTALLATION OF VENTILATION KIT (OPTIONAL art. MORKV720)
All MORETTI DESIGN fireboxes allow the installation (optional) of a ventilation kit that makes it possible, through
flexible pipes, to bring hot air also into adjacent rooms and/or away from the fireplace (heat distribution by forced
convection), thus ensuring the same comfort of the installa-
tion environment.
Optional ventilation kit contains:
• No. 1 Centrifugal fan - art. 251001101;
• No. 1 Control unit and thermostatic probe - art.
112000301;
• Mt 2 Power supply cable - art. 267000601;
• No. 1 Cable gland - art. 206000201
• No. 1 Decompression nozzle - art. 215000101;
• No. 2 Hot air nozzles - art. 215000801
• No. 4 Flexible pipes (Φ=120 mm; Lmax pipe = 1.5 m) -
art. FLEAL120;
• No. 2 White ABS round grille Φ=120 mm - art.
215000201;
• No. 4 Rings Φ=120 mm - art. 215000501
• No. 6 Connection clamps - art. 20FASC1113
• No. 1 Fan box with block - art. 620005401 & 2106000801
The technical specifications of the centrifugal fan are indicated in paragraph 4.1.
WARNING!!! For the installation of the ventilation kit, MORKV720 (optional), carry out the assembly near
the installation site considering a height equal to or greater than 36 cm between the support surface and
the fire surface. Raise the chimney above 4 (four) elements of building works of proven solidity and durabi-
lity. Take all safety precautions during installation
WARNING!!! The installation of the ventilation kit, MORKV720 (optional), must be carried out before the in-
stallation of the covering.
WARNING!!! The access from inside the combustion chamber allows only the assembly of the fan, not the
realisation of the necessary tubing for the recovery of the heating air.
7.7.1 ASSEMBLY PHASES
The next page shows the sequences for installing the MORKV720 kit
• Once the fireplace is positioned, remove the log guard, the refractory base and the cast iron of the firebox using
a hook. (seq. 1, 2 & 3)
• Remove the ash drawer (seq. 4)
• At the bottom of the fireplace you will see a rectangular plate fixed with 4 three-lobed screws, unscrew them with
a screwdriver and remove the cap. (seq. 5, 6 & 7)
Warning: Between the cap and the support surface there is a gasket that must not be removed.
• Install the 2 (two) nozzles on the FAN BOX (seq. 8)
• Insert the Fan Box on the bottom with the fan and screw the TCEI M6 screws from the inside (seq. 9, 10 & 11)
• Reinstall the plate at the bottom of the fireplace eliminating the 4 (four) pre-cut segments on the corners (seq.12,
13 & 14)
• Reposition the internal components. (seq. 15, 16, 17 & 18)
Warning: For the connection of the fan cable and the probe, see paragraph 4.6.6
• For the assembly of flexible pipes for hot air, follow the sequences 19, 20 & 21.
•

19
12
34
56
78

20
10
12
14
16
9
11
13
15