Nobis FLAT Service manual

EN - Installation, use and
maintenance manual
FLAT - ZENITH - CLASSIC
ZENITH 400

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
2
Dear Customer, Thank you for choosing a product from our range.
To make the most of the stove and all its features in total safety, we invite you to read this manual carefully
before starting to use the product.
This manual contains all information necessary for correct installation, start-up, use, cleaning and maintenance
of the product.
Keep this manual in a suitable place after reading it carefully.
Improper installation, maintenance or use of the product indemnify the Manufacturer from any liability deriving
from damages caused to people or things.
All rights reserved. No part of this instruction manual may be reproduced or transmitted by any electronic or
mechanical means - including photocopying, recording or any other storage system - for any purpose other
than the purchaser's personal use only without express permission for manufacturer's member.
W A R N I N G
SURFACES CAN BECOME EXTREMELY HOT - ALWAYS OBSERVE
DUE PRECAUTIONS AND WEAR SUITABLE PROTECTIONS.

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INDEX
1 INTRODUCTION 4
1.1 SYMBOLS 4
1.2 INTENDED USE 4
1.3 IMPROPER USE 4
1.4 IMPORTANCE OF THE MANUAL 4
1.5 GENERAL SAFETY WARNINGS 4
1.6 LEGAL WARRANTY 5
1.7 WARRANTY EXCLUSIONS 5
1.8 SPARE PARTS 6
1.9 IDENTIFICATION PLATE 6
1.10 PRODUCT DISPOSAL 6
1.11 HERMETIC PRODUCT 6
2 WOOD FEATURES 6
3 INSTALLATION 7
3.1 INSTALLATION ROOM 7
3.2 VENTILATION - AMBIENT AIR INTAKE 8
3.2.1 VENTILATION DUCTING 8
3.3 SMOKE CHANNEL AND FITTINGS 8
3.4 FIREPLACE/FLUE 9
3.5 CHIMNEY TOP 10
3.5 HERMETIC PRODUCT INSTALLATION 10
3.6 EXAMPLES OF PROPER INSTALLATION 11
3.7 DOCUMENTS TO BE ISSUED 11
3.8 UNPACKING THE PRODUCT 11
3.9 FUME EXHAUST ASSEMBLY 12
3.10 VENTILATION/CANALIZATION KIT 13
3.11 ELECTRICAL CONNECTION 14
4 TESTING AND MAINTENANCE 14
4.1 TESTING AND START-UP 14
4.2 MAINTENANCE OF THE FLUE SYSTEM 14
4.3 PRODUCT MAINTENANCE 14
5 PRODUCT TECHNICAL DATA 15
5.1 PRODUCT DETAILS 15
5.2 TECHNICAL FEATURES 15
5.3 PRODUCT DIMENSIONS 15
5.4 SAFETY DISTANCES 17
6 OPERATING PROCEDURES 17
6.1 COMMAND FUNCTIONS 17
6.2 PRODUCT SWITCH-ON 18
6.3 COMBUSTION ADJUSTMENT 19
7 PRODUCT CLEANING 19
7.1 CLEANING THE FIRE COMPARTMENT AND DRAWER 19
7.2 CLEANING THE GLASS 21
8 WIRING DIAGRAM 21

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1 INTRODUCTION
This manual must be considered as an integral
part of the product. The generator is designed and
built with high-quality materials and in compliance
with the reference standards for construction
products (EN13240 wood stoves, EN14785 pellet
appliances, EN13229 replaces/wood inserts,
EN12815 wood cookers). The products also
comply with the essential requirements of Directive
2014/35/EU (Low Voltage) and Directive 2014/30/
EU (Electromagnetic Compatibility).
Printing, translation and reproduction - even
partial - of this manual must be authorized by
the manufacturer. Also, contents related to the
product functioning and illustrations are not for
reproduction.
Always consult authorized technicians in case of
doubts and/or perplexities about the functioning
of the product.
The manufacturer reserves the right to modify
specications and technical and/or functional
characteristics of the product at any time without
prior notice.
1.1 SYMBOLS
This manual contains symbols highlighting the
importance of particular descriptions or concepts:
INFORMATION: Complying with the instructions
contained in this manual guarantees the correct
functioning of the product.
WARNING: Symbol used to identify information of
particular relevance.
DANGER: This symbols require utmost attention, to
guarantee user safety and product integrity.
1.2 INTENDED USE
The product covered by this manual is a replace
for domestic use, fuelled exclusively by wood
(manual loading).
The product is designed and built to work safely
under the following conditions:
• installation performed by specialized technicians
in compliance with specic reference standards;
• use within the limits stated on the product sheet
and in this manual;
• compliance with the technical procedures
described in the manual;
• carrying out ordinary maintenance as per
instructions illustrated in this manual;
• timely execution of extraordinary maintenance in
case of need (malfunctioning);
• activity and maintenance of safety devices (do
not remove or deactivate these devices).
1.3 IMPROPER USE
The product must not be intended for uses
other than that for which it was expressly made.
Otherwise, the manufacturer cannot be held
liable for any damages to people, animals or
things.
“Improper use” means:
• using the product as an incinerator;
• using the product with fuel other than that
described in the paragraph “Wood features";
• using the product with liquid fuels;
• using the product with the re door open and/or
broken glass and/or ash pan removed.
Any other use of the appliance other than that
envisaged must be previously authorized in writing
by the Manufacturer.
Furthermore,theManufacturerdeclinesanyliability
related to improper installation, adjustments, use
and maintenance of the product.
1.4 IMPORTANCE OF THE MANUAL
This manual aims at providing the basic rules for
proper installation, use and maintenance of the
product.
STORAGE: Keep the manual in an easily accessible
place;
DETERIORATION OR LOSS: Visit Nobis’ ofcial
website to download a digital version;
TERMINATION OF USE: In case of private sale of the
product, it is mandatory for the owner to deliver
the generator together with this manual, as it is an
integral part of the product.
1.5 GENERAL SAFETY WARNINGS
Failure to comply with the instructions in this
manual can cause damage to people, animals
or things.
• Installation, system check and product functional
test must be carried out by qualied and
authorized personnel only;
• The product must be connected to a single ue
duct which guarantees the draft declared by
the Manufacturer and which complies with the
installation standards envisaged in the place of
assembly of the same;
• The room where the product is installed must be
suitably oxygenated (air intake);

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• To avoid burns, always wear suitable safety
equipment before touching the hot surfaces of
the product;
• When in operation, the external surfaces of the
product reach high temperatures;
• It is prohibited to make changes to the product
unless expressly authorized in writing by the
Manufacturer;
• In the event of re in the ue, contact the Fire
Brigade immediately;
• The product cannot be used by a minor, a person
incapable of giving consent, or by a person with
reduced sensory, physical or mental capabilities.
Furthermore, it must not be used by persons who,
despite the aforementioned capacity, have not
had adequate training on use and maintenance,
or who - in any case - have not read this manual
in its entirety.
• Children must be kept away from the generator,
especially during operation and maintenance,
and they must be prevented from accessing the
product to play, even if the appliance is switched
off and cold.
• Cleaning and ordinary maintenance which can
be carried out by the user must not be performed
by a minor, persons not capable of giving consent
or persons with reduced sensory, physical or mental
capabilities. Furthermore, it must not be carried
out by persons who, despite the aforementioned
capacity, have not had adequate training on use
and maintenance, or who - in any case - have not
read this manual in its entirety.
• Do not place clothes or linen on the product,
neither dry nor wet. - Fire hazard;
• Any combustible or heat-sensitive material (e.g.,
sofas, tables, chairs, curtains, etc.) must be kept
at a safe distance from the product (see the
table in the "Safety distances" chapter for further
information) - Fire hazard.
• Do not place the drying rack in front of the
generator at a distance lower than that indicated
in the "Safety distances" chapter - Fire hazard.
• While in operation, the product’s replace door
must always be closed;
• The product must be electrically connected to
a system equipped with an effective earthing
system;
• Do not touch the generator if you are barefoot
and/or with wet and/or damp parts of the body;
• Do not pull, disconnect, or twist the electric cables
connected to the product - where present - even
if disconnected from the power grid, and avoid
contact with hot parts and/or smoke outlet;
• The product can be installed in a suitable room
with a minimum volume of 50 m3.
• For the non-airtight product, it is prohibited to
install the product in bedrooms, bathrooms, toilets
and studio apartments;
• It is prohibited to install the product in environments
with explosive atmosphere, places exposed to re
hazard, warehouses of combustible materials.
• Installation in rooms for which there is no heating/
not to be heated is not permitted;
• Check the product for any clogging before using
it following a long period of non-use.
1.6 LEGAL WARRANTY
In order to enforce the legal guarantee, the
user must scrupulously observe the instructions
indicated in this manual. In particular, the user
must:
• always operate within the limits of use of the
product;
• carry out routine maintenance in due time;
• authorize use to people of proven ability, aptitude
and adequately trained for the purpose;
• use original spare parts specic for the product
model.
It is also necessary to provide the following:
• scal receipt proving the date of purchase;
• certicate of conformity of the installation, issued
by authorized staff.
Failure to comply with the instructions contained
in this manual will result in immediate forfeiture
of the warranty, both of the product and of any
spare parts tted at a later time.
1.7 WARRANTY EXCLUSIONS
All malfunctions and/or damage to the appliance
due to the following causes are excluded from
the warranty:
• damage caused by transport and/or handling;
• negligence, careless use, improper maintenance,
or installation which does not comply with the
manufacturer's specications (always refer to this
manual);
• further damages caused by wrong interventions
by the user in an attempt to remedy the initial
malfunctioning;
• increased damage caused by further use of
the appliance by the user once the defect has
occurred;
• damage deriving from using the product as a
chang dish;
• inefciency of chimneys, ues, or parts of the
system on which the appliance depends and
which generate condensate;
• damage caused by tampering, atmospheric
agents, natural disasters, acts of vandalism,
electric shocks, res, defects in the electrical and/
or hydraulic system;
• damage caused by prolonged excessive fuel
load (see the paragraph “Wood features” for
more information).

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The following are also excluded from the product
warranty:
• parts subject to normal wear and tear such as
gaskets, glasses, coverings and cast-iron grids,
painted, chromed or gilded details, handles,
electric cables, lamps, ignition resistors, lights,
knobs, and all parts that can be removed from the
replace (e.g., refractory panels, brazier) and/or
directly exposed to re;
• colour changes in the paint of ceramic parts, as
well as cracks of the ceramic, as they are natural
features of the material and naturally deriving
from normal use;
• masonry;
• other system details (if any) not supplied by the
manufacturer.
Any technical interventions aimed at restoring
the product must be agreed with the Authorized
Technical Assistance Centre, which reserves the
right to accept the assignment or not. Technical
interventions are subject to fees according to the
rates in force.
Moreover, any expenses needed for remedying
incorrect technical interventions, tampering or, in
any case, factors harmful to the appliance and
not attributable to manufacturing defects will also
be charged to the user.
Without prejudice to the limits imposed by laws
or regulations, any guarantee of containment of
atmospheric and noise pollution is also excluded.
1.8 SPARE PARTS
Use only original spare parts.
Do not wait for components to wear out before
replacing them.
In the event of product malfunction, this helps to
prevent accidents caused to people, animals or
things.
To replace spare parts, consumables, and to carry
outextraordinary maintenance,itisrecommended
to contact an authorized technician.
1.9 IDENTIFICATION PLATE
An identication plate, to be found on the back
of the product, shows all the product technical
information, including the Manufacturer's data,
serial number and CE marking.
1.10 PRODUCT DISPOSAL
Responsibility for the demolition and disposal of the
product is borne solely by the owners, who must
act in compliance with the laws in force in their
country with regard to safety and environmental
protection.
At the end of its useful life, the product must not
be disposed of together with municipal waste.
It can be delivered to the local separate waste
collection centres provided by the municipal
administrations, or to the retailers providing such
service.
Disposing of the product through separate waste
collection helps to avoid possible negative
consequences for both environment and health
which can derive from inappropriate disposal.
This also allows the recycling of materials and
obtain signicant savings in terms of energy and
resources.
1.11 HERMETIC PRODUCT
The products built with a perfectly air-tight structure
do not consume room oxygen, as they take the
air from outside the building (if properly installed)
and can, therefore, be placed inside all houses
with a high degree of insulation, such as “passive
houses" or highly energy-efcient. Thanks to such
technology, there is no risk of smoke emissions into
the environment and, therefore, there is no need
for ventilation grids.
Hermetic products can also be installed in the
presence of forced ventilation or in rooms where
pressure can be lower if compared to the outside.
2 WOOD FEATURES
Permitted fuels: wood logs. Only dry wood logs
(max. water content: 20%) must be used. It is
recommended to employ a maximum load of 2-3
wood logs. Also, the logs must be approx. 20-30
cm long and have a maximum diameter of 30-35
cm.
The combustion chamber max. dimensions are:
width 32 cm.
height 45 cm.
depth 35 cm.
Use these dimensions as a reference to purchase
wood logs no larger than 33 cm. It is recommended
to use long-lasting essences such as beech, oak
or elm. Avoid very aromatic essences or essences
with high content of resin (myrtaceae, eucalyptus,
pine, r) which can cause problems, even serious
ones, to the product.

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Suggested fuel: BEECHWOOD
• caloric value: about 4.6 kWh/kg;
• ideal humidity level: from 15% to 20%;
• maximum log length: 33 cm.
Wood logs must be stored in a dry and not
excessively cold place. It is also advisable to keep
a quantity of wood logs sufcient for 2/3 days of
operation in the room where the product is used,
so as to allow any moisture present to dry out.
Neglecting this aspect will result in lower thermal
potential of the fuel and, as a consequence more
maintenance to be carried out.
Be careful when using pressed logs as they have a
high caloric value: there is a risk of overheating,
which could damage the product.
Prohibited fuels
We recommend not to use the following fuels, as
they could be harmful to health and environment,
thus invalidating the warranty:
• very damp wood
• treated wood (chipboard, lacquered,
varnished, glued, etc.)
• treated paper and cardboard (varnished,
oiled, impregnated kitchen paper, etc.)
• woodworking residues, such as shavings and/
or sawdust
• liquid fuels
• coal and other fossil derivatives
• rubbish, plastic and/or - more generally -
anything that releases toxic and polluting
substances through combustion.
• Fruit pits, pomace, corn, shells, mixtures of
the above with wood pellets, pellets NOT
produced with sawdust only.
The declared technical data have been obtained
using class A1 beech essence (in compliance with
UNI EN ISO 17225-5) and humidity lower than 20%.
Using other essences could lead to the need for
specic adjustments and could cause the product
to obtain different yields.
3 INSTALLATION
Installation and use must take place in
compliance with all the respective ISO, EN, UNI
reference standards in force and pursuant local
and national laws.
Product installation and its connection to both the
ue and heating systems must be carried out by
a qualied technician, according to the laws in
force (in Italy, e.g., see Ministerial Decree 37/08
and subsequent amendments, and Legislative
Decree 28/11 and subsequent amendments).
The manufacturer is not liable for any claim for
compensation for damages due to installation
which does not comply with the technical
standards and all the legislative provisions in
force, or for installation carried out non-competent
and non-authorized persons, as indicated in the
previous paragraph.
3.1 INSTALLATION ROOM
• Product position (before assembly) must be
chosen according to the following: installation
environment; presence of a suitable ue or its
possibility to build one; presence of a compliant
electrical system; according to the presence of
an aeraulic or hydraulic system (if applicable); the
possibility to have direct, indirect ventilation or air
ducting (if applicable).
• The room must be suitable for installation (see also
the technical standards in force, e.g., UNI10683).
It must not be: a room exposed to the risk of
re, a potentially dangerous room, a deposit of
combustible material, a non-heatable room
(should the appliance heat the installation room).
• Evaluate the attic/oor capacity before placing
the product. If the existing construction does not
meet this requirement, appropriate measures
should be taken (e.g., installing a load distribution
plate). It is recommended to consult a professional
on the subject.
• The installation room must have a minimum
volume of 50 m3
• Minimum safety distances for re prevention
must be taken into consideration when installing
the appliance in the room. In the presence of
combustible materials and/or heat-sensitive
materials (furniture, curtains, sofas, wooden walls
and surfaces, building insulation, etc.) adjacent
to the generator, minimum free space must be
observed as per values shown in the relevant
table of the "Safety distances” chapter.
• The installation of the appliance must take
into consideration any presence of other heat
generators or suction systems (e.g., hoods,
extractor fans, etc.) for the following purposes:
• summation of the powers, for re-prevention
purposes;
• possible coexistence, e.g., with non-airtight
gas- and/or diesel-fuelled appliances (see
technical standard UNI10683). Remember that
it is forbidden to install non-airtight biomass
appliances in rooms connected with other
premises where there is a type A or type B gas or
diesel generator;
• suitability assessment of the direct and/or
indirect room ventilation system to serve the
suction systems and appliances installed;
• The installer must analyse the technical

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specications of the appliance to verify its
compatibility with the energy requirements of
the room(s) served and the coexistence with any
other appliances.
3.2 VENTILATION - AMBIENT AIR INTAKE
• The installation room of non-hermetic appliances
must be sufciently ventilated with special
openings, with particular attention to their position,
which has to ensure air to recirculate. Remember
that non-hermetic appliances feed the re by
consuming the oxygen present in the installation
room.
• Ventilation is considered sufcient when the room
is equipped with air intakes according to the table:
APPLIANCE
CATEGORY
REFERENCE
STANDARD
% NET CROSS-
SECTION COMPARED
TO STOVE SMOKE
OUTLET CROSS-
SECTION
VENT. DUCT
OPENING MIN. NET
VALUE
Fireplaces UNI EN 13229 50% 200 cm
2
Stoves UNI EN 13240 50% 100 cm
2
Cookers UNI EN 12815 50% 100 cm
2
• If the ventilation intake is made in an adjacent
room directly connected with the outside, the hole
between the ventilation room and the installation
room must be doubled at each passage (see
UNI10683). The hole to the external environment
must be equal to what is prescribed in the previous
point. Pay attention to any other suction systems
to prevent that negative pressure occurs in the
ventilation room and/or installation room.
• The maximum pressure difference allowed
between the outside and the installation room is
always and in any case 4Pa (that is, room negative
pressure).
• Ventilation air for the installation rooms cannot
be taken from rooms exposed to the risk of re,
e.g., garages, bedrooms, bathrooms and toilets,
shared premises.
• Combustion air cannot be drawn from crawl
spaces, or from less than half a metre from the
return/delivery vents of the crawl spaces.
• Ventilation holes can be closed with grids as long
as they do not reduce their useful section, and do
not hinder ordinary maintenance operations.
• The ventilation inlets must NEVER be obstructed
by any type of material, not even partially, which
could jeopardize the occupants’ health.
• The ventilation outlets must comply with the
relevant technical standards and any current local
and national regulations, specically with regard
to their section, position, type and characteristics.
• Ventilation holes are not made necessary in the
case of installation of airtight appliances (which
are equipped with their specic ventilation duct).
• In the presence of a CMV system (Controlled
Mechanical Ventilation), installation with
combustion air drawn from the installation room
is not permitted - see the "Ventilation ducting"
chapter;
• The manufacturer is not liable for any claim for
compensation for damages due to non-compliant
installation of the ventilation outlets with respect
to the above, and to the technical standards and
all the legislative provisions in force.
3.2.1 VENTILATION DUCTING
• To channel combustion air from the outside to
a traditional appliance or, in case of airtight
installation (hermetic appliance), it is necessary to
install a ventilation duct.
• The ventilation duct must have a section equal to
or greater than the combustion air connection of
the appliance.
• The ventilation duct must have the same section
along its entire length. Narrowing the duct is only
allowed at the generator inlet;
• The ventilation ducts and relative grids must
comply with the technical standards and any
current local and national regulations, specically
with regard to their section, position, type and
characteristics.
• The manufacturer is not liable for any claim for
compensation for damages due to non-compliant
installation of the ventilation ducts with respect to
the above, and to the technical standards and all
the legislative provisions in force.
• In the presence of a CMV system (Controlled
Mechanical Ventilation) the installation of
hermetic appliances or appliances with a closed
replace is permitted as long as combustion air is
drawn directly from the outside via a ventilation
duct.
3.3 SMOKE CHANNEL AND FITTINGS
The term “smoke duct” refers to the set of pipes
and elements connecting the appliance to
the chimney/ue to convey the products of
combustion towards the outside.
Smoke ducts are very important sections that
must be installed correctly for the whole system to
work correctly.
• All smoke ducts must be sized using a thermo-
uid dynamic calculation, in compliance with
EN13384-1;
• Smoke ducts must be installed in compliance with
Technical Standard UNI10683;
• Metal ducts must comply with Product Standard
EN1856-2;
• The sub-horizontal sections must have a minimum
upward slope of 3%;
• The length of the sub-horizontal section must be
minimal and its oor projection must not exceed

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mechanical stress, it must have suitable resistance
to corrosion caused by solid fuels, and be properly
insulated to avoid condensation (i.e., thermal
insulation);
• The ue must be predominantly vertical and free
of bottlenecks along its length;
• Be properly spaced by air gap and isolated from
ammable materials. In the case of installation
of a composite chimney, to verify surface
temperatures for re-prevention purposes,
the thermal calculation must be performed in
compliance with EN15287;
• If a chimney system is installed, safety distances
from ammable materials must be assessed as per
the product designation given in the CE marking,
in the DoP and on the chimney plate;
• Changes of direction must be max. 2 and with an
angle not exceeding 45°;
• The ue inside the house must in any case be
insulated, and can be inserted in a shaft, provided
that it complies with the regulations relating to
ducting;
• The smoke duct must be connected to the ue by
means of a "T" tting equipped with an inspectable
collection chamber (necessary for collecting
combustion residue and, above all, condensate);
• The chimney/ue must expel smoke above the
roof, as required by the standard UNI10683.
• It is prohibited to connect the appliance to a
replace/ue shared with other appliances or in
the presence of extractor hoods or other aspirators.
Collective ues are not permitted. It is forbidden to
expel exhaust directly from the wall or into closed
spaces, or in any other way not envisaged by the
legislation in force in the country of installation
(e.g., in Italy, only roof outlet is permitted).
• It is possible to use the air from the interspace of the
chimney stack, in compliance with the provisions
of UNI10683;
• In case of multiple ducting, avoid mutual
interference and pay attention to the pressures,
distances and coexistence of the various ducts, in
compliance with standard UNI10683;
• In case of wet operation, set up the condensate
drainage system by scrupulously following the
provisions set by standard UNI10683;
2 metres;
• There cannot be more than 3 changes in direction,
including that of the chimney/ue connection
and, in the case of appliances with rear outlet,
excluding the T-joint or bend at the generator
connection. Changes in direction must not have
an angle greater than 90° (bends of max. 45° are
recommended);
• The section diameter must be constant or greater
from the replace outlet to its connection with the
ue;
• It is prohibited to use exible metal pipes, even
non-telescopic ones;
• The smoke duct for appliances equipped with a
smoke fan must ensure the seal of the combustion
products and have the seal class at minimum
pressure P1;
• In any case, the smoke ducts must seal any
combustion products and condensate, as well
as be insulated if they present sections extending
outside the installation room;
• With regard to the smoke duct, it is necessary to
create a rst vertical section, at least 1 metre long,
to guarantee proper fume discharge;
• The smoke ducts must not cross rooms in which the
installation of combustion appliances is prohibited,
rooms at risk of re, reproof rooms, rooms exposed
to a specic risk of re, or non-inspectable spaces;
• The smoke duct must maintain, throughout its
length, safety distances from ammable materials
as per specications given by the smoke duct
manufacturer.
• It is prohibited to install manual draft adjustment
devices on forced draft appliances;
• It is necessary to provide the sampling point for
both draft measurement and fume analysis, as
per standards UNI10683 and UNI10389-2.
3.4 FIREPLACE/FLUE
The term chimney/ue refers to the section of the
smoke exhaust system going from the connection
to the generator or smoke duct up to the roof.
When building the chimney/ue, the following
requirements must be applied:
• Metal ducts must comply with product standard
EN 1856-1;
• All chimneys/ues must be sized using a thermo-
uid dynamic calculation, pursuant EN13384-1.
• Chimneys/ues must be installed according to
technical standard UNI10683. Both chimney
systems and internal ue ducts are permitted.
• Operation under positive pressure is not permitted.
Chimney systems and internal ue ducts must
operate with negative pressure with respect to
the environment, as per product technical data
sheet.
• The ue must be made with suitable materials
to guarantee resistance to normal thermal and

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10
3.5 CHIMNEY TOP
UNI10683 prescribes that the chimney pot must
comply with the following requirements:
• The smoke outlet section must be at least double if
compared to the internal section of the chimney;
• It must be shaped in such a way as to prevent
water or snow from penetrating;
• A windproof cap must be provided to ensure
proper smoke outlet even in case of wind;
• The smoke outlet level (which is measured
between the lower side of the roof covering and
the lower point of the fume outlet section) must be
outside the reux area;
• It must always be placed away from antennas or
satellite dishes, and must never be employed to
support other objects;
• It must ensure regular maintenance;
• It must be installed at a safe distance from other
chimneys, or obstacles with and without openings
(e.g., doors, windows, dormer windows, skylights,
etc.), in compliance with UNI10683.
3.6 HERMETIC PRODUCT INSTALLATION
In case of hermetic products, you can follow the
example below: fume exhaust (1) and recovery of
combustion air directly from the outside (2).
1
2
9
7
7
A
1
2
3
3
4
5
8
8
6
9
9
B
C
8
6

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
11
3.7 EXAMPLES OF PROPER INSTALLATION
Always refer to the standard UNI 10683 when
product installation has to be carried out by a
qualied professional, who is required to issue the
INSTALLATION CERTIFICATE OF CONFORMITY on
the whole Italian territory. Examples: (A) horizontal
section needed for connection to an existing
ue. Observe a minimum upward slope (3-5%) to
reduce the quantity of ash deposit in the horizontal
section of the pipe - which must not exceed 2m
(1). The existing ue must be inspectable (2).
The installation of the product (B) requires an
insulated ue (3), as the entire smoke pipe has
been mounted outside the building.
Example (C) shows a single-wall smoke duct (4)
for the indoor section. With regard to the part
located in the attic, outside the room where the
generator is installed, it is necessary to install an
insulated section, with double crossing of the slab
and the roof; the passing holes of the pipe must
respect the minimum safety distances indicated
on the labels of the sections of the ue pipe itself,
paying attention to the possible contact with the
material crossed, as is the case with:
• if in contact with concrete, bricks, etc.;
• if in contact with wood, composite materials, etc.
In both cases, insert a suitable roof passage (5)
between the ue and the attic.
It is recommended to check and respect the
data on the ue plate, paying particular attention
to safety distances from combustible materials.
The previous rules also apply to connection holes
drilled on the wall.
In the lower part of the ue pipe, a "T" type
connector (6) with inspection plug (7) has been
tted for the all the 3 types of installation.
In the upper part of the ue, for all 3 examples,
a windproof chimney pot (8) has been mounted.
For all the 3 types of installations, a grate (9) has
been provided to ensure good oxygenation of
the room where the product has been placed. In
case of hermetically sealed appliance, equipped
with direct outdoor connection of the air-intake
system, a grate is not required.
3.8 DOCUMENTS TO BE ISSUED
After installation, the installer must hand over to
the user the following:
• use and maintenance manual of the appliance
(supplied by the manufacturer);
• technical documents of the accessories used and
subject to maintenance;
• the documentation relevant to the evacuation
system of combustion products;
• System booklet;
• the documentation certifying installation and
functional test;
The useful documentation for the installer’s liability
must include:
• adetaileddescription(alsoincludingphotographs)
of the presence of other heat generators;
• Declaration of Conformity of the system to
standard (M.D. 37/08);
• general description, or diagram, or photographic
documentation of the changes made to the
system, if intervention was necessary during
installation;
• Use of certied material with the CE mark
(305/2011);
• any other relevant information useful for warranty
purposes;
• date and signature of the installation technician;
NOBIS SRL cannot be held liable in the event of
non-compliance with any installation and startup
standards.
3.9 UNPACKING THE PRODUCT
The packaging is composed of boxes in recyclable
cardboard, according to RESY standards, and
wooden pallets. All packaging materials can be
re-used for similar use or, if necessary, disposed of
as urban waste, in compliance with legislation in
force.
Cut the strap binding the pallet to the packaging
and lift the cardboard; remove the plastic bag
around the product, ensuring it is intact.
The body must always be moved in a vertical
position using trolleys.
Pay particular attention so that the door and its
glass are protected against mechanical impacts
which would compromise their integrity.
If possible, unpack the product near the area
where it will be installed.

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
12
To remove the appliance from the pallet, unscrew
the metal supports holding it, so as to release it
from the wooden base.
Place the appliance and connect it to the ue
pipe. Install the 4 adjustable feet to be found in
the accessory box and adjust them to properly
connect the smoke outlet with the collar.
3.10 FUME EXHAUST ASSEMBLY
Below you will find the instructions for proper
installation of the smoke outlet, which can be
upper (standard installation) or rear.
This chapter also deals with non-standard
installation options. Pipes for non-standard
installations are not provided and have to be
purchased from your trusted dealer/assistance
centre.
Installation, disassembly/reassembly of the
appliance must be carried out by qualied
personnel authorized by Nobis Srl.
Please note that opening the appliance by
unauthorized personnel will invalidate the product
warranty.
UPPER CONNECTION
ATTENTION TO THE SECTION OF THE SMOKE DUCT
WHICH MUST WIDHSTAND TEMPERATURES THAT
CAN EASILY REACH 600°C.
NEGATIVE PRESSURE IN THE SMOKE EXHAUST
SYSTEM MUST RESPECT THE VALUE OF 11Pa.
REAR CONNECTION
Remove the rear pre-drilled hole to gain access
and remove the cap, unscrewing the 3 screws
with the size 8 hex key. Repeat the operation to
remove the cast-iron collar xed to the product
head.
With the 3 M5 screws, x the collar where the
cap was previously removed and connect the
horizontal section of the smoke duct;
Fix the cap on the head of the product in
correspondence with the hole (previously opened
in the "upper outlet" conguration) and place the
aesthetic covering panel, supplied as accessory.

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
13
3.11 VENTILATION/CANALIZATION KIT
The installation of the ventilation kit (or the
optional canalization kit) is illustrated below with
the relative disassembly/reassembly diagram of
the appliance covering panel.
For models equipped with drawer, it is necessary
to remove the drawer before installing the kit by
acting on its rails with the 2.5 wrench (M4 screws).
INSTALLATION OF THE VENTILATION KIT
Following the holes (see arrows), x the ventilation
kit to the internal rear plate with a size 8 key (M5
screws).
Lift the cast-iron top cover and x the air conveyor
with the size 8 key (M5 screws).
Remove the rear side with the size 8 key (M5
screws), take the contact thermostat from the kit
box and connect it to the side of the air duct using
a Phillips screwdriver.
FN
Remove the pre-drilled grid to allow the wiring to
pass from the contact thermostat to the air fan
(see wiring diagram at the end of the manual for
further details).
INSTALLATION OF THE CANALIZATION KIT
Remove the pre-drilled hole on the back of the
product and, following the hole pattern (see
arrows), x the ducting kit to the internal rear plate
with a size 8 spanner (M5 screws).
Lift the cast iron top and x the air conveyor with
the size-8 key (M5 screws).

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
14
Remove the rear side with the size 8 key (M5
screws), take the contact thermostat from the kit
box and connect it to the side of the air duct using
a Phillips screwdriver.
FN
Remove the pre-drilled grid to allow the wiring to
pass from the contact thermostat to the air fan
(see wiring diagram at the end of the manual for
further details).
3.12 ELECTRICAL CONNECTION
The product power cord must be connected only
after the installation and assembly of the product
have been carried out. The cord must not enter in
contact with hot parts and must remain accessible
even after installation.
To plug in the product, proceed as follows:
• connect the power cord to the back of the
appliance;
• connect the plug of the power cable to the wall
socket.
power
It is mandatory that the system is equipped with
both earthing and differential switch, as per the
laws in force. Also, make sure that the socket is
compatible with the type of plug on the power
cord used.
4 TESTING AND MAINTENANCE
Testing and maintenance operations, with the
exception of ordinary cleaning (see related
section in this manual), must be carried out by
an authorized technician. Before carrying out
any operation on the product, take the following
precautions:
• all parts of the product must be "cold";
• make sure that there is no form of combustion
(e.g., ash and embers still hot);
• dump the ash into a metal container;
• always use protective devices;
4.1 TESTING AND START-UP
Before starting up the product make sure to test
proper functioning of the following elements:
connection to the smoke exhaust system;
check that all the materials for the construction
of the smoke duct, ue and chimney pot are
compliant with the law and t for use.
The test is successful only when all the operating
parts have been veried without detecting
anomalies.
4.2 CHIMNEY SYSTEM MAINTENANCE
The ue pipe must always be clean,
as deposits of soot or unburned residues can clog
its section, thus reducing draft and
compromising proper functioning of the product.
Moreover, if present in large quantities, they can
catch re. It is mandatory to have the ue and
chimney pot cleaned and checked by a qualied
chimney sweep at least once a year or after a
prolonged inactivity. At the end of the check/
maintenance, get a report certifying that the
system is safe.
Neglecting to clean the product jeopardizes the
safety of the system.
4.3 PRODUCT MAINTENANCE
To be done at least once a year. During maintenance,
the authorized technician will have to :
• carry out a complete and thorough cleaning of
the smoke duct;
• reassemble the appliance in all its parts;

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
15
• check the tightness of all seals and gaskets;
• check proper functioning and
combustion.
5 PRODUCT TECHNICAL DATA
This chapter provides the end user with all the
information relating to the technical data of
the product: overall dimensions, installation
dimensions and minimum mandatory distances to
be kept from walls, furniture and any ammable
objects that can be found in the premises where
the product is installed.
5.1 PRODUCT DETAILS
PRODUCT DETAILS
EU 2015/1186
Brand Nobis
Model FLAT/ZENITH/
CLASSIC 8KW
FLAT/ZENITH/
CLASSIC 10KW
Energy efciency class A+ A+
Direct heating output (kW) 7.2 8.8
Indirect heating output (kW) - -
Energy efciency index 113 115
Useful efciency (rated pwr. %) 85 86.1
Please observe the warnings, installation procedures and
guidelines for regular maintenance contained in this manual.
5.2 TECHNICAL FEATURES
Model FLAT/ZENITH/CLASSIC
8KW
FLAT/ZENITH/CLASSIC
10KW
Weight (Kg) 165
Ø air inlet (mm) 100
Ø smoke outlet pipe (mm) 150
Heating max. vol.* (m3)177 216
Input power (kW) 8.5 10.2
Output power (kW) 7.2 8.8
Yield (%) 85 86.1
CO with 13% of O2 (mg/m3)610 455
Wood hourly consumption (kg/h) 1.98 2.41
Exhaust gas ow (g/s) 9.1 8.8
Min. draft (Pa) 12 11
Smoke temperature (°C) 189 194
* this value may vary from the type of energy class
of the house and from the type of wood used.
The data shown are indicative and not binding.
Also, they may vary depending on the type of
wood used. The manufacturer reserves the right
to make any modications to improve
the performance of the products.
5.3 PRODUCT DIMENSIONS
FLAT 100
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
515
790
150
150
Smoke Outlet
450 150
Smoke Outlet
100
Air Inlet
115
70
630
1170
515 450
515
895
1030
515
1170
1030
450
450
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B B
C C
D D
E E
F F
G G
H H
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10
10
9
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8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 100
CODICE FORNITORE
-
1
N0069-SLAN-E1_T
138.37 E.B. R.A. 22/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
515
790
150
150
Smoke Outlet
450 150
Smoke Outlet
100
Air Inlet
115
70
630
1170
515 450
515
895
1030
515
1170
1030
450
450
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 100
CODICE FORNITORE
-
1
N0069-SLAN-E1_T
138.37 E.B. R.A. 22/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
515
790
150
150
Smoke Outlet
450 150
Smoke Outlet
100
Air Inlet
115
70
630
1170
515 450
515
895
1030
515
1170
1030
450
450
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
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9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 100
CODICE FORNITORE
-
1
N0069-SLAN-E1_T
138.37 E.B. R.A. 22/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
16
FLAT
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
480
1200
150
150
Smoke Outlet
450
100
Air Inlet
1015
150
Smoke Outlet
460
100
60
Canalization
190
105
480
1600
450
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
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9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 300
CODICE FORNITORE
-
1
N0071-SLAN-E1_T
153.13 E.B. R.A. 24/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
480
1200
150
150
Smoke Outlet
450
100
Air Inlet
1015
150
Smoke Outlet
460
100
60
Canalization
190
105
480
1600
450
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 300
CODICE FORNITORE
-
1
N0071-SLAN-E1_T
153.13 E.B. R.A. 24/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
480
1200
150
150
Smoke Outlet
450
100
Air Inlet
1015
150
Smoke Outlet
460
100
60
Canalization
190
105
480
1600
450
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 300
CODICE FORNITORE
-
1
N0071-SLAN-E1_T
153.13 E.B. R.A. 24/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
ZENITH
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
525
1200
051
150
Smoke Outlet
475
100
Air Inlet
1015
460
60
Canalization
105
120 210
150
Smoke Outlet
475 525
1600
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO ZENITH 400
CODICE FORNITORE
-
1
N0074-SLAN-E1_T
166.75 E.B. R.A. 27/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS
S.r.l. Senza autorizzazione scritta della stessa, il presente
disegno non potrà essere utilizzato per la costruzione dell’oggetto rappresentato né
venire comunicato a terzi o riprodotto. La Società proprietaria tutela i propri diritti a
rigore di legge. All proprietary rights reserved
by NOBIS
S.r.l.
This drawing shall not be reproduced or in any way utilized for the
manufacture of the component of unit herein illustrated and must not be released to
other parties without written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
525
1200
051
150
Smoke Outlet
475
100
Air Inlet
1015
460
60
Canalization
105
120 210
150
Smoke Outlet
475 525
1600
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO ZENITH 400
CODICE FORNITORE
-
1
N0074-SLAN-E1_T
166.75 E.B. R.A. 27/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS
S.r.l. Senza autorizzazione scritta della stessa, il presente
disegno non potrà essere utilizzato per la costruzione dell’oggetto rappresentato né
venire comunicato a terzi o riprodotto. La Società proprietaria tutela i propri diritti a
rigore di legge. All proprietary rights reserved
by NOBIS
S.r.l.
This drawing shall not be reproduced or in any way utilized for the
manufacture of the component of unit herein illustrated and must not be released to
other parties without written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
525
1200
051
150
Smoke Outlet
475
100
Air Inlet
1015
460
60
Canalization
105
120 210
150
Smoke Outlet
475 525
1600
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO ZENITH 400
CODICE FORNITORE
-
1
N0074-SLAN-E1_T
166.75 E.B. R.A. 27/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS
S.r.l. Senza autorizzazione scritta della stessa, il presente
disegno non potrà essere utilizzato per la costruzione dell’oggetto rappresentato né
venire comunicato a terzi o riprodotto. La Società proprietaria tutela i propri diritti a
rigore di legge. All proprietary rights reserved
by NOBIS
S.r.l.
This drawing shall not be reproduced or in any way utilized for the
manufacture of the component of unit herein illustrated and must not be released to
other parties without written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
17
CLASSIC
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
505
1250
150
150
Smoke Outlet
465
100
Air Inlet
150
Smoke Outlet
60
Canalization
500
150
1060
190 100
465 505
1650
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO CLASSIC 220
CODICE FORNITORE
-
1
N0077-SLAN-E1_T
172.28 E.B. R.A. 07/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
505
1250
150
150
Smoke Outlet
465
100
Air Inlet
150
Smoke Outlet
60
Canalization
500
150
1060
190 100
465 505
1650
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO CLASSIC 220
CODICE FORNITORE
-
1
N0077-SLAN-E1_T
172.28 E.B. R.A. 07/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
505
1250
150
150
Smoke Outlet
465
100
Air Inlet
150
Smoke Outlet
60
Canalization
500
150
1060
190 100
465 505
1650
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO CLASSIC 220
CODICE FORNITORE
-
1
N0077-SLAN-E1_T
172.28 E.B. R.A. 07/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
5.4 SAFETY DISTANCES
L
B
F
R
U
TUTTI GLI SVILUPPI FORNITI IN FORMATO DXF SONO TEORICI . IL PARTICOLARE REALIZZATO DEVE ESSERE CONFORME AL DISEGNO 2D/3D
ALL FLAT PATTERNS PROVIDED IN DXF FORMAT ARE THEORETICAL . THE PIECE MUST BE IN COMPLIANCE WITH THE 2D/3D DRAWING
480
1200
150
150
Smoke Outlet
450
100
Air Inlet
1015
150
Smoke Outlet
460
100
60
Canalization
190
105
480
1600
450
Revisioni
Area Rev. Descrizione Data Approvata
1 RILASCIO PROGETTO 13/02/2018 R.A.
A A
B B
C C
D D
E E
F F
G G
H H
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
--
MATRICE (MATRIX)
(SUPPLIER CODE)
ASSIEME MODELLO FLAT 300
CODICE FORNITORE
-
1
N0071-SLAN-E1_T
153.13 E.B. R.A. 24/03/2023
-
-
(DENOMINATION)
Proprietà della Società NOBIS S.r.l. Senza autorizzazione scritta della
stessa, il presente disegno non potrà essere utilizzato per la costruzione
dell’oggetto rappresentato né venire comunicato a terzi o riprodotto. La
Società proprietaria tutela i propri diritti a rigore di legge.
All proprietary rights reserved by NOBIS S.r.l. This drawing shall not be
reproduced or in any way utilized for the manufacture of the component of
unit herein illustrated and must not be released to other parties without
written consent. Any infringement will be legally pursued.
A2 1:6
DENOMINAZIONE
MATERIALE
DATA CONTR. PESO Kg.
TRATTAMENTO SUPERFICIALE (SURFACE TREATMENT)
DISEGNATORE
SCALA (SCALE) FORMATO (FORMAT)
STATO
(STATUS)
REVISIONE
(REVISION)
TOLLERANZE GENERALI SECONDO LA CLASSE UNI EN 22768-mK
GENERAL TOLERANCES AS PER UNI EN 22768-mK
NOBIS S.r.l.
N. DISEGNO
(MATERIAL)
(DESIGNER) (DATE)
(DRWG NR.)
(CHECKED) (WEIGHT)
Via Palazzolo,11 25037
Pontoglio - BS - Italy
P.iva e Cod. Fisc. 04222670160
S
MATERIA PRIMA (RAW MATERIAL)
Minimal distance from ammable
materials
RRight 400 mm
LLeft 400 mm
BBack 250 mm
F Front side 800 mm
UUpper side 800 mm
6 OPERATING PROCEDURES
This chapter shows how to best operate the
product: ignition and optimal combustion
adjustments.
6.1 COMMAND FUNCTIONS
The air supply for combustion is controlled by two
valves which are operated by special control
handles.
The control handle on the right of the product
controls the primary air ow, which is used to light
the ame and for combustion when the wood is
denser. During ignition the combustion chamber
needs to get as much air as possible, i.e., the
lever has to be fully turned to the right (+). When
combustion has propagated completely, the
primary air intake can be delicately closed by
sliding the lever (-) to the left.

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
18
-+
The central handle controls secondary air and
is used to adjust combustion when the stove is
running. Secondary air is fully open when the
handle is turned to the right (+), while it decreases
when the handle is moved to the left (-).
-+
To verify proper combustion, check the colour of
the ame. If the ame tends to darken, generating
soot in the combustion chamber and black puffs
of smoke, this is an indicator of bad combustion
due to lack of air. It will therefore be necessary to
add secondary air by turning the central lever to
the right (+) to improve combustion.
Please also note that the logs must measure max.
33cm in length and no more than 8cm in diameter;
wood humidity must be less than 18-20%.
6.2 PRODUCT SWITCH-ON
This chapter highlights a series of operations to be
carried out when switching on the appliance
for the rst time.
When the product is switched on for the rst time,
unpleasant odours or fumes may be generated
due to the evaporation or drying of some of the
materials used. Such phenomenon will disappear
after a few hours of use. During this period, it is
advisable to keep the premises well ventilated.
Below is the sequence of operations to be
performed to optimize the product start-up:
1. Clean the combustion grate, removing any
residues left from previous use. If necessary,
empty the ash drawer.
2. Adjust both the primary and secondary air
levers so that they are set to the right (+);
3. Prepare a multi-level ignition module on the
grate as follows:
• 4 dry logs crossed on 2 levels, about 25-30 cm
long and weighing about 0.5 kg each;
• 2 levels of thin pieces of rewood (about 20-25
cm long) to ignite the ame, as shown in the
gure
4. Place the natural relighter (ame) on top of
the ignition module.
5. Close the door of the combustion chamber.
Do not overload the appliance. The tertiary air
holes on the back of the combustion chamber must
never be blocked. Exceeding the recommended
rell quantities may damage product, thus voiding
the warranty. An excessive load, will result in poor
combustion and will lead to excessive smoke
temperatures, which can damage the product,
the smoke duct and ue.
All the external surfaces of the product reach high
temperatures. If you have to touch the surfaces of
the appliance, always remember to use the glove
supplied.
It is recommended to keep the two combustion
air handles open for the entire duration of the rst
load (after ignition) to bring both the combustion
chamber and the smoke duct up to temperature,
and to prevent the ame from extinguishing.
When the stove is running and - above all -
during the heating and cooling phases, ticking
noises may be heard. These are due to thermal
expansion/contraction of the materials due to
changes in temperature throughout operation.

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
19
During operation, do not use the product with the
re door open. The re door can be opened only
for the time needed to load the wood. To avoid
excessive leakage of combustion smoke into the
room, it is recommended to open the door slowly.
6.3 COMBUSTION ADJUSTMENTS
Once both the combustion chamber and of the
entire ue pipe has reached the right temperature,
the primary air handle can be adjusted to optimize
combustion performance. The combustion rate
and, therefore, the thermal power generated, is
regulated both by the quantity of wood in the
combustion chamber and primary air. A ame
that is too fast decreases the duration of the wood
and lowers the yield of the product, therefore,
during operation, the primary air must close and
combustion must be adjusted by acting on the
secondary air.
Maximum performance can be obtained by
loading two 250 mm logs of beech wood for a
total weight of 2 kg. Primary air fully closed and
secondary air open as shown in the gure.
Combustion is efcient and “clean” when the
ame looks pale yellow. If the ame tends towards
red, or if you notice black smoke in the combustion
chamber, turn the handle in the middle to slightly
increase secondary air.
To learn how to adjust combustion correctly, an
initial period of use is required.
When fuel is added above the embers in the
absence of ame, a large amount of smoke could
develop. In such event, an explosive mixture of
gas and air could form which - in extreme cases
- could result in an explosion. For safety reasons, it
is advisable to carry out a new ignition procedure
using small strips.
7 PRODUCT CLEANING
To ensure easy access to the appliance and the
ue, remember to leave enough room to carry
out cleaning and maintenance operations when
installing the product.
For proper cleaning, please follow the instructions
below carefully. Non-compliance with the
following instructions could cause malfunctioning.
Take the following precautions before carrying
out any cleaning operation:
• Make sure all parts of the appliance are cool to
the touch;
• Make sure the ash is completely extinguished and
cool to the touch;
• Always be properly equipped when you carry out
maintenance;
• After maintenance, reinstall all the removed parts,
in the same way, before putting the product back
into service.
Use a wet rag moisturised with
water and soap to clean painted
metal surfaces.
The use of harsh detergents or thinners will
damage to the product surfaces.
The quality of the rewood, the way the stove is
used and the combustion adjustment settings
can inuence the frequency of maintenance
interventions.
7.1 CLEANING THE FIRE COMPARTMENT AND DRAWER
Open the door using the specic
tool and:
• Vacuum the residues present in the
combustion chamber with a suitable ash
vacuum cleaner, making sure that the ash is
completely extinguished;
• Vermiculite does not require cleaning. In any
case, if you intend to remove soot particles,
use only a soft brush.
OPERATING PROCEDURE:
To open the door, use the specic handle supplied
with the product by inserting it in its housing, as
illustrated below.

Use and maintenance manual, models “FLAT - ZENITH - CLASSIC” ENGLISH
20
With a soft brush, remove the combustion dust,
dumping it onto the underlying surface.
Vacuum the rewood support surface, taking
care not to hit the vermiculite with the nozzle of
the vacuum cleaner.
Extract the drawer under the grate of the
combustion chamber and empty it, paying close
attention for the ash could still be incandescent.