klover BELVEDERE 20 Specification sheet

ENGLISH
BELVEDERE 20
wood boiler
stove
INSTALLATION, USE, MAINTENANCE
AND TIPS

SERVICE DECLARATION
Ref. Annex III EU Regulation no. 305/2011
DoP/KLOVER-028
1. Identification number
:
BV20
2. Model and/or lot no. and/or serial no. (Art.11-4)
:
BELVEDERE 20
3. Intended use of the product according to the relevant
harmonised technical specification
:
Home heating appliance fed with wood logs
which can also produce domestic hot water
4. Name or trademark of the manufacturer (Art11-5)
:
KLOVER s.r.l.
I - 37047 San Bonifacio (VR) –Via A. Volta, 8
5. Name and address of the representative (Art.12-2)
:
-
6. Assessment and verification system of the performance
constancy (Annex 5)
:
System 3
7. Notified laboratory
:
NB 1880
ACTECO s.r.l.
I - 33084 Cordenons (PN) –Via Amman, 41
Number of test report (based on System 3)
:
1880-CPR-050-15
8. Declared performances
HARMONISED TECHNICAL SPECIFICATION
EN 13240
PERFORMANCE FEATURES
PERFORMANCE
Fire resistance
A1
Distance from combustible material
200 mm
Fuel spillage risk
Compliant
Emission of combustion products
-Nominal power
CO at 13% of O20.186 %
Effective temperature
Compliant
Electrical safety
Compliant
Accessibility and cleaning
Compliant
Maximum operating pressure
2.5 bar
Mechanical strength
NPD (performance not determined)
Thermal performance
-Nominal power
-Nominal power yielded to the environment
-Nominal power yielded to water
22.6 kW
9.5 kW
13.1 kW
Yield
-Nominal power
ɳ80.4 %
Flue gas temperature
-Nominal power
T310° C
9. The performance of the product referred to in points 1 and 2 is compliant with the declared performance in
point 8.
This declaration is released on the sole responsibility of the manufacturer referred to in point 4.
Signed in the name and on behalf of the manufacturer by:
San Bonifacio (VR), 24/08/2015
Mario Muraro
Chairman of the Board

1
CONTENTS
CONTENTS.......................................................................................................................................................................................................... 1
INTRODUCTION ................................................................................................................................................................................................. 3
IMPORTANT SAFETY INSTRUCTIONS.................................................................................................................................................................. 3
THE APPLIANCE AND WOOD......................................................................................................................................................................... 4
COMPONENTS OF THE APPLIANCE .................................................................................................................................................................... 4
OVERALL DIMENSIONS ...................................................................................................................................................................................... 8
CONNECTIONS DATA SHEET.............................................................................................................................................................................. 9
TECHNICAL SPECIFICATIONS .......................................................................................................................................................................... 10
TYPES OF WOOD.............................................................................................................................................................................................10
REQUIREMENTS OF THE PLACE OF INSTALLATION............................................................................................................................. 12
POSITIONING................................................................................................................................................................................................... 12
EXTERNAL AIR INTAKE .................................................................................................................................................................................... 12
THE FLUE PIPE AND CONNECTION TO THE SAME ............................................................................................................................................. 13
CHIMNEY ........................................................................................................................................................................................................13
ELECTRICAL CONNECTION.......................................................................................................................................................................... 14
ELECTRONIC CONTROL UNIT ...........................................................................................................................................................................14
CONTROL OF ANY COUPLED BOILER ...............................................................................................................................................................18
CONTROL OF A POSSIBLE THREE-WAY MOTORISED VALVE FOR THE DHW SYSTEM (ON PREPARED MODELS ONLY) ...................................... 19
EXAMPLE OF ELECTRICAL CONNECTION.......................................................................................................................................................... 20
HYDRAULIC CONNECTION ........................................................................................................................................................................... 21
INITIAL START-UP...........................................................................................................................................................................................23
FILLING THE BOILER UNIT AND THE SYSTEM FOR THE FIRST TIME....................................................................................................................23
ANTIFREEZE PROTECTION ..............................................................................................................................................................................23
SWITCHING ON................................................................................................................................................................................................ 23
OPERATION ....................................................................................................................................................................................................25
PRODUCTION OF DOMESTIC HOT WATER (SUITABLE MODELS ONLY)...............................................................................................................25
BOILING ..........................................................................................................................................................................................................25
PROBLEMS, ALARMS, USEFUL ADVICES.................................................................................................................................................25
USEFUL INFO…..............................................................................................................................................................................................25
WHAT HAPPENS IF.. ........................................................................................................................................................................................ 26
CLEANING AND MAINTENANCE..................................................................................................................................................................27
PRECAUTIONS BEFORE CLEANING ..................................................................................................................................................................27
CLEANING THE COMBUSTION CHAMBER..........................................................................................................................................................27
CLEANING THE ASH DRAWER..........................................................................................................................................................................29
CLEANING THE CERAMIC GLASS......................................................................................................................................................................29
CLEANING THE FLUE PIPE ............................................................................................................................................................................... 29
MAINTENANCE ................................................................................................................................................................................................ 29
MAINTENANCE OF THE BOILER UNIT................................................................................................................................................................30
WARRANTY CONDITIONS .............................................................................................................................................................................31

BELVEDERE 20 WOOD BOILER STOVE
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Dear client,
First of all we would like to thank you for choosing a “KLOVER” product and we hope you will be satisfied with this
product.
Read the warranty guarantee carefully, which is found on the last page of this User guide; fill out the attached warranty
card in full and return it within 10 days from the date of purchase.
We would like to thank you again for trusting KLOVER products, and we would also like inform you that these models
are the result of forty years of experience in the manufacture of solid fuel products using water as heat transfer fluid.
Every single detail of the product is manufactured by qualified staff, using the most advanced equipment.
The manual contains a detailed description of the appliance and its operation, instructions for proper installation, basic
maintenance and control points, which must be periodically performed; furthermore it contains practical advice which
helps to obtain maximum performance from the appliance with minimum fuel consumption.
Stay warm with KLOVER!
Technical Support
Klover wood and pellet appliances are imported and distributed by FirePower Heating, Dunkeswell, Dunkeswell
Business Park, Honiton, EX14 4RD.
UK technical and product support to dealers is provided by FirePower Heating who can be reached on 0844 3320156 or
alternatively you can email them at [e-mail].
Copyright
All rights reserved. The reproduction of any part of this manual, in any form, without the explicit written permission of
KLOVER Srl. is forbidden. The content of this manual may be modified without notice. Although the documentation
contained in this manual has been carefully compiled and checked, KLOVER srl cannot be held liable for any damages
arising from the use of the same.
Copyright © 2016 KLOVER srl

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EN - Rev. 2.3
INTRODUCTION
Important safety instructions
Please read these instructions before installing and using the appliance.
-The installation and initial start-up of the appliance must be performed by skilled personnel trained in the relevant
safety standards. They will be responsible for the definitive installation of the appliance and its proper operation.
KLOVER srl shall not be held liable if these precautions are not observed.
-During installation of the appliance, all local regulations - including those referring to national and European
Standards - must be observed.
-Connect the flue gas outlet to a flue with the specifications described in the “Flue and its connection” section of this
User guide.
-The appliance is not suitable for installation on a shared flue system.
-If the flue should catch fire, use appropriate fire extinguishing equipment or call the fire brigade.
-Connect the appliance to an earthed power socket. Avoid using sockets controlled by switches or automatic timers.
-Do not use the power supply cable if damaged or worn.
-If a multiple socket is used, make sure that the total voltage of the connected devices does not exceed the rated
voltage for the socket. Also make sure that the total voltage of all the devices connected to the socket does not
exceed the maximum permitted level.
-Do not use flammable substances to clean the appliance or its parts.
-Do not leave flammable containers and substances in the place where the appliance is installed.
-The appliance works exclusively with logs and only with the hearth door shut.
-NEVER open the door of the appliance during normal operation.
-The use of poor quality wood or any other material can damage the appliance operation, voiding the warranty and
exempting the manufacturer from all liability.
-Do not use the appliance as an incinerator or for any use other than that for which it was designed.
-Do not use fuels other than those recommended.
-Do not use liquid fuels.
-The appliance, and its outer surfaces in particular, become very hot to the touch during operation; handle with
caution in order to avoid burns.
-Use the anti-burn glove to open the fire door and to regulate the smoke dampers and combustion air.
-Only use original spare parts recommended by the manufacturer.
-Do not make any unauthorised modifications to the appliance.
-Do not touch the hot components of the appliance (ceramic glass, flue pipe and the entire outer frame) during normal
operation.
-Never touch the appliance if you are barefoot and/or if you have wet or damp parts of the body.
-Use the appropriate button to switch off the electrical panel. Do not disconnect the power supply cable while the
appliance is operating.
-During the ignition phase and normal operation of the appliance, maintain the necessary safety distance and do not
remain standing in front of it.
-Keep children away from the appliance when it is running since they could get burned by touching its hot
components.
-Do not leave the packaging elements within reach of children or unassisted disabled persons.
-Children and inexperienced people must not be allowed to use the appliance.
-Do not use the appliance in ways other than those indicated in this user guide.
-The appliance is designed for indoor use only.
-This user guide constitutes an integral part of the appliance. If the appliance is sold to another user, this manual must
be passed on to the new owner.
KLOVER S.R.L. DECLINES ALL LIABILITY IN CASE OF ACCIDENTS DUE TO FAILURE TO COMPLY WITH THE
SPECIFICATIONS OF THIS MANUAL.
KLOVER S.R.L. DECLINES ALL LIABILITY DUE TO INCORRECT USE OF THE APPLIANCE BY THE USER,
UNAUTHORISED MODIFICATION AND/OR REPAIRS, AND USE OF NON-ORIGINAL SPARE PARTS OR SPARE
PARTS NOT SPECIFICALLY DESIGNED FOR USE ON THIS APPLIANCE MODEL.

BELVEDERE 20 WOOD BOILER STOVE
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EN - Rev. 2.3
KLOVER S.R.L. SHALL NOT BE HELD LIABLE FOR THE INSTALLATION OF THE APPLIANCE. THE INSTALLER
IS THE SOLE PARTY RESPONSIBLE FOR THIS OPERATION AND IS ALSO ENTRUSTED WITH CHECKING THE
FLUE, EXTERNAL AIR VENT AND THE CORRECTNESS OF THE PROPOSED INSTALLATION SOLUTIONS. ALL
THE SAFETY REGULATIONS SET OUT IN THE SPECIFIC LAWS IN FORCE IN THE COUNTRY OF THE STOVE'S
INSTALLATION MUST BE OBSERVED.
NON-ROUTINE MAINTENANCE MUST ONLY BE PERFORMED BY AUTHORISED AND QUALIFIED STAFF.
To ensure the validity of the warranty, the user must comply with the instructions contained in this guide and, in
particular, must:
-Use the appliance within its operating limits;
-Regularly perform all maintenance activities;
-Authorise expert and competent people to use the appliance.
Failure to comply with the instructions contained in this guide shall automatically void the warranty.
THE APPLIANCE AND WOOD
Components of the appliance
The table below shows the standard features of the appliance:
Expansion tank
6 l
Safety valve
2.5 bar
Pressure gauge
0 –4 bar
Check valve
Yes
Automatic air vent valve
Yes
Heating system pump
Yes. Mod.25/70
Heating exchanger
Yes
DHW heat exchanger
On prepared models only
System loading cock
Yes
Boiler unit loading cock
Yes
The appliance is delivered with the following equipment:
-No. 1 - user, installation and maintenance guide;
-No. 1 - power supply cable;
-No. 1 brush D.65-300 mm L.700 mm.
-No. 1 bottle 1 l “LONG LIFE” protective.

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EN - Rev. 2.3
Draught regulation handle.
Turn the handle to the vertical
position to open.
Turn the handle to the
horizontal position to close.
Primary manual
combustion air
damper. Move the knob
right to open.
Move the knob left to
close.
Cover
SICURO TOP.
Primary exchanger
(heating).
SICURO TOP
Automatic air
vent valve (jolli)
Upper smoker damper.
Boiler unit loading cock.
Secondary exchanger (domestic)
(on prepared models only).
Technical compartment.
Combustion chamber.
Electronic control unit.
Level switch
(water level sensor).
Float to load boiler
unit water.
Sensor pocket for
water temperature.

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EN - Rev. 2.3
High-efficiency circulating
pump for heating system.
Circulating
pump speed
switch.
Pressure gauge (indicates the
pressure of the heating system).
Boiler unit drain
cock.
Boiling discharge pipe
connection SICURO TOP.
Delivery pipe connection of the heating
system with check valve.
REAR VIEW OF PLUMBING
CONNECTIONS
Heating system loading
cock.
Secondary automatic combustion air damper.
Turn the knob anti-clockwise to open.
Turn the knob clockwise to close.
DHW outlet pipe connection
(on prepared models only).
Return pipe connection of the
heating system.
DCW inlet pipe connection.
+ System load.
+ Boiler unit load.
FRONT VIEW TECHNICAL COMPARTMENT
Cable connecting 3-way
motorised valve for domestic
water system.
Expansion vessel 6 l
with pre-load 1 bar.
Anti-interference filter
Main switch, connection for power supply
cable with 2 built-in fuses (4A 250V).
Ash collection drawer.
Safety valve
calibrated to 2.5 bar

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EN - Rev. 2.3
UPPER VIEW TECHNICAL
COMPARTMENT
Domestic hot water outlet pipe connection (on prepared
models only).
DCW inlet pipe connection.
+ System load.
+ Boiler unit load.
Return pipe connection of the heating system.
Boiling discharge pipe connection SICURO TOP.
Delivery pipe connection of the heating system with
check valve.
Heating system loading cock.

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EN - Rev. 2.3
Overall dimensions

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Connections data sheet
Description of connections
M= System Delivery
3/4" F
R= System Return
3/4" F
F= Domestic cold water inlet (on prepared models only) and boiler unit and system load
1/2" M
C= Domestic hot water outlet (on prepared models only)
1/2" M
S= Boiling discharge
3/4" M
Sf = Flue gas outlet
150 mm M
E =Electricity connection
REAR VIEW

BELVEDERE 20 WOOD BOILER STOVE
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EN - Rev. 2.3
Technical Specifications
Nominal heat input
kW (Kcal/h)
28.1 (24,200)
Nominal thermal output
kW (Kcal/h)
22.6 (19,500)
Nominal power released to heating water
kW (Kcal/h)
13.1 (11,300)
Nominal power delivered to room due to radiation
kW (Kcal/h)
9.5 (8,200)
Efficiency at thermal nominal power
%
80.4
CO at 13% oxygen at nominal thermal power
%
0.185
Nominal voltage
V
220
Nominal frequency
Hz
50
Expansion vessel litres/preloading bar
6 / 1
Maximum operating/recommended pressure
bar
2.5 / 1.5
Flue pipe diameter
mm
150
Minimum chimney draught at nominal thermal power
Pa
10
Combustion gas mass at nominal thermal power
g/s
14.85
Average exhaust flue gas temperature at nominal thermal power
°C
315.7
Hourly wood consumption *
Kg/h
6.4
Wood loading interval *
min
45
Boiler unit capacity
litres
50
Width
mm
600
Height
mm
1180
Depth
mm
560
Minimum safety distance from flammable materials
mm
200
Weight model with majolica sides (painted steel)
Kg
260 (250)
*Wood consumption is subject to the quality and dryness of the wood.
The values provided above are obtained in accordance with standard EN 13240
Types of wood
Wood is one of the most precious materials offered by nature. For heating purposes, it must be verified that the features
of the wood satisfy some important requisites that must not be ignored, the most important of which is without a doubt
the correct seasoning or drying, in other words the wood must have the correct amount of humidity, around 10-15%,
therefore also the period of the year in which it is felled becomes important. This should coincide with the winter period.
Correct seasoning (at least 2 years) provides fuel with an excellent yield that is not very pollutant.
It must be kept in covered, well-aired places, already cut into pieces of a suitable size for the appliance.
The wood is divided into softwood and hardwood on the basis of the weight kg of a cubed metre of material. Softwoods
weighing 300-350 kg/m3 include fir, pine, poplar, European alder, chestnut and willow, while hardwoods weighing 350-
400 kg/m3 include beech, ash, elm, acacia and oak.
Softwood ignites easily, burns quickly, produces a long flame and is used in stoves needing a long flame pass.
Hardwood is more compact, the combustion is slower with short flame, it lasts longer and is more suitable for domestic
central heating.
The wood to be burned for heating purposes has different features according to the plant variety from which it is
obtained. Not all woods are equal, and the drying time and the calorific value vary from plant to plant. The calorific value
depends on the humidity and density of the wood. Top quality woods are beech, ash, elm and acacia. Avoid resinous
woods as they reduce the appliance's service life.
Resinous woods generate a lot of soot and require the flue and the appliance to be cleaned more frequently. The
calorific value of the different types of wood depends greatly on their humidity and consequently the power of the stove

BELVEDERE 20 WOOD BOILER STOVE
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EN - Rev. 2.3
is directly affected by the type of wood used, on average a well-seasoned wood has a calorific value of 3200 kcal/kg.
Calorific value of wood in relation to humidity:
CALORIFIC VALUE of the wood means the amount of heat yielded during combustion, referring to the unit quantity of
the material burned.
The calorific value of a wood species depends on the presence of lignin (6000 Kcal/kg) or cellulose (4000 Kcal/kg) as
well as the abundance of resin (8500 Kcal/kg).
The calorific value per unit of weight ( = absolute) is highest in Conifers
-Absolute calorific value of conifers: 4700 Kcal/kg
-Absolute calorific value of broad-leaved species: 4350 Kcal/kg.
On the other hand the SPECIFIC WEIGHT of the “broad-leaved species” is greater; therefore with equal volumes
introduced into the appliance, both the weight and amount of heat available for combustion are greater; in practice the
relative calorific value is higher (referring to a unit of volume).
For example: the calorific value of the white fir is practically the same as that of the oak, but the oak has a specific
weight that is twice that of the fir. Therefore half the volume of oak must be introduced into the appliance in order to have
the same "heat" obtained from the fir.
*Calorific value
(Kcal/Kg)
**Specific weight
(Kg/m3)
WHITE FIR
4650
440
RED FIR
4857
450
MAPLE
4607
740
BIRCH
4968
650
BLACK ELM
4640
820
CHESTNUT
4599
580
TURKISH OAK
4648
900
CYPRESS
5920
620
BEECH
4617
750
ASH
5350
720
HOLM OAK
/
960
LARCH
4050
660
EUROPEAN ALDER
4700
530
FLOWERING ASH
/
760
PLANE TREE
/
690
CYPRESS POPLAR
4130
500
FALSE ACACIA
4500
790
DOWNY OAK
4631
880
* theoretical absolute value
** wood seasoned in the air; residual humidity 12-15 %
% humidity
Calorific value kcal/kg
15%
3490
20%
3250
25%
3010
30%
2780
35%
2450
40%
2300

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EN - Rev. 2.3
REQUIREMENTS OF THE PLACE OF INSTALLATION
Positioning
The initial phase for best installation of the appliance is to determine its optimum location; the following elements need to
be considered:
-The possibility of creating an external air vent;
-The possibility of creating a straight flue, preferably coaxial to the outlet of the appliance;
-The possibility of creating piping required for the boiling discharge;
-Proximity to the main water drain and/or the boiler (if one already exists);
-Proximity or ease of connection to the water system;
-Ease of access for cleaning the appliance, the flue gas exhaust pipes and the flue.
The unit must be installed on a floor with a suitable load capacity. If the existing building does not fulfil this requirement
appropriate measures (e.g. load distribution plate) must be taken.
The minimum safety distance from flammable materials must be at least 200 mm from the sides and back of the
appliance.
Relocating the appliance should not be done by forcing on the handle, glass or ceramics/steel sides.
The installation must guarantee easy access for cleaning the appliance, the flue gas exhaust pipes and the flue, and any
subsequent maintenance operation by the Authorised technical assistance centre.
Once you have found the best location for the appliance, position it following the instructions given below.
Furniture and movable objects must be positioned at least 15 cm from the side surfaces of the appliance; these objects
must be moved when performing maintenance on the appliance.
Protect all structures that can catch fire against the radiated heat of the fire.
External air intake
During operation, the appliance takes in air from the environment in which it is installed; It is therefore essential that this
air is replaced through an external air vent. The absence of the air vent may affect the flue draught and therefore the
combustion and the safety of the appliance.
Therefore it is mandatory to install an external air vent with a minimum completely free passage of at least 80 cm2
(round hole with minimum diameter of 15 cm protected with a special fixed large mesh grid).
It is recommended to drill the hole in immediate proximity to the appliance.
If it not possible to put the external air vent in the same room as where the appliance is installed, this hole can be made
in an adjoining room as long as this room communicates permanently, by means of a transit hole (15 cm minimum
diameter).
The hole must be protected externally with a fixed grille. The protective grille must be checked periodically to ensure that
it is not obstructed, thereby impeding the passage of air. Therefore keep the air vents clear of obstructions.
The UNI 10683 Standard FORBIDS the drawing of combustion air from garages, warehouses storing combustible
materials, or from business premises with a fire hazard.
If there are other heating or extraction devices inside the room, the air vents must guarantee a sufficient amount of air for
properly operating all the devices.
Only sealed appliances (e.g. C type gas appliances, according to the UNI 7129 Standard) or appliances that do not
cause a lower pressure compared with the external environment can pre-exist or be installed in the place where the
appliance is installed.
Extractor fans can cause malfunctions to the appliance if used in the same room.

BELVEDERE 20 WOOD BOILER STOVE
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EN - Rev. 2.3
The flue pipe and connection to the same
The flue pipe is an essential element for the efficient operation of the appliance. The boiler stove smoke outlet is
150mm in diameter. The flue must have a minimum cross section of 180 mm with a minimum height of 4 metres. Each
product must be equipped with its own flue, without other adjoining elements (boilers, chimneys, stoves etc.). The flue
dimensions are closely related to its height, which must be measured from the appliance flue gas outlet to the base of
the stack. In order to guarantee adequate draught, the chimney stack flue outlet surface must be twice as big as the flue
pipe cross-section. The discharge pipe for combustion products generated by the forced draught device, must comply
with the following requirements:
-It must seal off the combustion gases, as well as being waterproof and suitably isolated and insulated in relation to
the conditions of use (refer to UNI 9615);
-It must be made of suitable materials capable of withstanding normal mechanical stress, heat, and the effects of
combustion gases and condensate, if any;
-It must go upwards after the vertical section, for the entire remaining part, with a minimum gradient of 20%; The sub-
horizontal section must not have a length greater than ¼ of the effective height H of the flue or chimney, and must
not be longer than 2,000 mm;
-It must preferably have a round internal cross-section: square or rectangular cross-sections must have rounded
corners with radius not inferior to 20 mm;
-It must have a constant, free and independent internal cross section;
-Rectangular cross-sections must have a maximum ratio of 1.5 between the sides;
-If the flue pipe is installed on the outside it is essential that it is insulated in order to avoid the flue gas cooling
allowing condensation to form;
-Parts made from non-combustible materials (it is absolutely prohibited the use of aluminium flue pipe) - capable
of withstanding combustion gases and potential condensation - must be used for mounting the flue gas pipes (for the
section from the appliance to the flue inlet);
-It is forbidden to use fibre cement pipes to connect the appliance to the flue;
-Flue pipes must not pass through rooms in which the installation of combustion devices is prohibited;
-The flue pipes must be assembled in such a way as to guarantee adequate sealing of flue gases during low pressure
operation of the appliance;
-The installation of horizontal sections is prohibited;
-It is prohibited to use counter sloping elements;
-The flue gas pipe must allow for the recovery of soot or be cleanable, and must have a constant cross-section;
-It is forbidden to allow other air intake conduits and system pipes to transit inside the flue gas pipes, even if they are
over-sized.
Below are examples of pipe connections to the flue pipe:
Chimney
The chimney is a device crowning the flue, used to ease dispersion of combustion products.
It must satisfy the following requirements:
-It must have a usable outlet cross-section no less than double that of the flue onto which it is inserted;
-In must be shaped in such a way as to prevent rainwater or snow from seeping into the flue;
-It must be built in such a way as to ensure the discharge of combustion by-products even in the event of winds from
every direction and inclination.

BELVEDERE 20 WOOD BOILER STOVE
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EN - Rev. 2.3
The outlet height (where height refers to the top of the flue, regardless of any chimney stacks) must be outside of the so-
called reflux zone, in order to prevent the formation of counter-pressures preventing the free discharge of combustion
by-products into the atmosphere.
It is therefore necessary that the minimum heights - indicated in the following diagrams - are observed:
ELECTRICAL CONNECTION
The electric connection must only be performed by qualified staff, in compliance with all general and local safety
standards.
Check that the power supply voltage and frequency correspond to 230V –50 Hz.
The appliance's safety is ensured when it is properly connected to an efficient earthing system.
In the electric connection to the mains power supply, include a 6 A –Id 30 mA differential trip-switch with suitable
breaking load. The electric connections, including the earth connection, must be made after shutting off the electrical
system.
When completing the system, bear in mind that the cables must be laid in an unmovable manner and far from parts
subject to high temperatures. During the final wiring of the circuit, only use components with a suitable electrical
protection rating. Do not pass electric cables in the immediate vicinity of the flue gas pipe, unless they are insulated with
suitable materials. Connection to the mains power supply should only be carried out after the wires have been connected
to the terminal board.
KLOVER srl declines all responsibility for injury to persons and animals or damage to objects due to failure to
connect the appliance to earth or to comply with IEC specifications.
Electronic control unit
The electric control unit installed on the appliance controls the heating pump, switches the 3-way motorised valve fitted
on the water system, switches on and off the heat generator, if installed, and starts any additional pumps.
It is composed of:
-Master switch (used to supply power to the control unit itself);
-Pump adjustable thermostat (used to activate or deactivate the pump on reaching, or not, the temperature we set
on the thermostat itself);
-Valve adjustable thermostat (used to exchange any motorised valve on reaching, or not, the temperature we set on
the thermostat itself. It is normally used for DHW in combination with another heat generator);
-AUX adjustable thermostat (used to control whether or not the heat generator reaches the temperature set on the
thermostat);
-SERV adjustable thermostat (used to activate or deactivate an additional pump on reaching, or not, the
temperature set on the thermostat);
-Thermometer (indicates the temperature of the water inside the boiler unit);
-Acoustic alarm (activated whenever the boiler water temperature reaches 90-95°C);
-Level switch (indicates that water is not up to level inside the boiler).

BELVEDERE 20 WOOD BOILER STOVE
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Two cables exit the control unit, one of which has no plug. The cable with the plug should be connected to a mains
socket with the specifications detailed above. The insulated cable with 4 wires should be connected to the three-way
motorised valve installed in the domestic water system (see section “Control of a possible three-way motorised valve for
the DHW system”).
The control unit has an internal fuse T 3,15A.
DESCRIPTION OF THE KEYS
-P1 ON/OFF
this button, when pressed for two consecutive seconds, switches the control unit on/off, depending on whether it is off or
on respectively.
During normal operation of the appliance, the control unit must ALWAYS be switched on.
-P2 DECREASE TEMPERATURE
Depending on which thermostat is selected, it decreases the value set.
If pressed at the same time as P3, it activates the DHW function.
-P3 INCREASE TEMPERATURE
Depending on which thermostat is selected, it increases the value set.
If pressed at the same time as P2, it activates the DHW function.
-P4 SET/MENU
Provides access to the set thermostat values signalled by the associated PUMP / VALVE / AUX / SERV LEDs flashing.
It also allows you to save changes made to the values for each thermostat.
DESCRIPTION OF LEDS
-L1 PUMP LED
The led turns on when the pump thermostat is selected.
The LED lights up when the pump thermostat temperature setting is reached.
-L2 VALVE LED
The LED turns on when the valve thermostat is selected.
The LED lights up when the valve thermostat temperature setting is reached.
-L3 AUX LED
The LED flashes when the auxiliary thermostat is selected.
The LED lights up when the auxiliary thermostat temperature setting is reached.
P1
P2
P3
P4
L5
L1
L2
L3
L4
L6
L7

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EN - Rev. 2.3
-L4 LEVEL SWITCH LED
The LED turns on when the tank is empty or the water level is too low.
-L5 OFF LED
This LED is lit when the control unit is off.
-L6 DHW LED
This LED flashes when the DHW function is being set.
The LED is lit when the DHW function is on.
-L7 SERV LED
The LED lights up when the service thermostat is selected (for additional pump).
The LED lights up when the service thermostat (for additional pump) temperature setting is reached.
Inputs
PROBE
Water Probe: Temperature Range 0 –100 °C
H2O LEVEL
ON/OFF permission: Level switch
Outputs
PUMP
System pump:
230 V AC power supply
Terminal clamps 13(FON) - 14(N)
SERV
Service:
230 V AC power supply
Terminal clamps 9(FON) - 10(N)
VALVE
Valve:
230 V AC power supply
Terminal clamps 6(FON) - 7(N) -
8(FOFF)
AUX
Auxiliary:
Free contacts
Terminal clamps 3(NO) - 4(COM) -
5(NC)
OPERATION
-ON/OFF:
The control unit is switched on/off by pressing and holding the P1 (ON/OFF)
The OFF status is signalled by the fact that the L5 LED turns on.
-SAFETY function:
If the temperature detected by the H2O PROBE exceeds the value of the Safety Thermostat, this forces the activation
of the PUMP.
-SAFETY function:
If the temperature detected by the H2O PROBE exceeds the value of the Alarm Thermostat, this activates the acoustic
and visual signal.
SILENCE: pressing any button deactivates the acoustic signal for 5 minutes.

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EN - Rev. 2.3
-NO ICE function:
If the temperature detected by the H2O PROBE goes below the value of the ANTIFREEZE Thermostat, this activates
the timed PUMP outlet.
The relative L1 LED turns on and ICE starts flashing on the display.
-PUMP ANTI-LOCKING programme:
In the event of inactivity of the PUMP outlet for longer than the ANTILOCKING Timer, this activates the outlet of the
PUMP.
The relative L1 LED turns on and bLP appears on the display.
-SECURE TEMP function:
If the device is OFF and in SECURE mode, the device automatically positions itself to ON status.
-LEVEL SWITCH function:
The closure of the input closure determines the activation of the L4 LED.
-OUTLET function:
PUMP ON: for temperatures above the PUMP thermostat setting
for temperatures above the ALARM thermostat setting
for temperatures below the ANTIFREEZE thermostat setting
VALVE ON: for a temperature above the VALVE Thermostat temperature
AUX ON: for a temperature above the AUX Thermostat temperature
SERV ON: for a temperature above the SERVICE Thermostat temperature
-DHW function:
By holding down the P2 (-) and P3 (+) buttons at the same time it is possible to activate the DHW function. At this point,
while the L6 LED flashes, just set the time (in minutes) for which you want to have all the heat burned for the production
of domestic hot water. This function turns the pump off for the set time in minutes. When this function is active, the pump
will turn on only if the safety temperature of 85 ° C is reached. It is possible to deactivate this function by holding down
the P2 (-) and P3 (+) buttons again.
MAIN MENU
With a simple click of the P4 (SET) button, it is possible to scroll though the values of the set Thermostats signalled by
the flashing of the associated PUMP / VALVE / AUX LED.
To change the value:
-Go to the Thermostat value to be changed.
-By using the P2 (-) and P3 (+) buttons, it is possible to increase/decrease the value.
-To save the change, press P4 (SET).
-To exit the menu, press P1 (ESC) or wait for 5 seconds.
Parameters
Symbol
Min
Factory
setting
Max
Recommended
values
Reference led
PUMP thermostat
A01
50 °C
55 °C
85 °C
Minimum 55 °C
L1
VALVE thermostat
A02
20 °C
65 °C
85 °C
65 °C
(only if connected)
L2
AUX thermostat
A03
20 °C
85 °C
85 °C
50 °C
(only if connected)
L3
SERV thermostat
A04
20 °C
85 °C
85 °C
60 °C
(only if connected)
L7