klover BI-FIRE MID Quick start guide

ENGLISH
BI-FIRE MID
Pellet and
Wood boiler
stove
INSTALLATION, USE AND
MAINTENANCE, USEFUL TIPS

SERVICE DECLARATION
Ref. Annex III EU Regulation no. 305/2011
DoP/KLOVER-021
1. Identification number
:
BFM
2. Model and/or lot no. and/or serial no. (Art.11-4)
:
BI-FIRE MID
3. Intended use of the product according to the relevant
harmonised technical specification
:
Home heating appliance fed with wood pellets
and 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 1881
IMQprimacontrol s.r.l.
I –31020 Zoppè di San Vendemiano (TV)
Via dell’Industria, 55
Number of test report (based on System 3)
:
CS-10-047, CS-10-048
8. Declared performances
HARMONISED TECHNICAL SPECIFICATION
EN 14785
EN 13240
PERFORMANCE FEATURES
PERFORMANCE
PERFORMANCE
Fire resistance
A1
A1
Distance from combustible material
200 mm
200 mm
Fuel spillage risk
Compliant
Compliant
Emission of combustion products
-Nominal power
-Reduced power
CO at 13% of O20,025 %
CO at 13% of O20,043 %
CO at 13% of O20,016 %
Effective temperature
Compliant
Compliant
Electrical safety
Compliant
Compliant
Accessibility and cleaning
Compliant
Compliant
Maximum operating pressure
2,5 bar
2,5 bar
Mechanical strength
NPD (performance not
determined)
NPD (performance not
determined)
Thermal performance
-Nominal power (reduced)
-Nominal power (reduced) yielded to the environment
-Nominal power (reduced) yielded to water
15 kW (4,9 kW)
4,3 kW (1,9 kW)
10,7 kW (3 kW)
12,7 kW
3 kW
9,7 kW
Yield
-Nominal power
-Reduced power
ɳ 90,8 %
ɳ 90,7 %
ɳ 76,3 %
Flue gas temperature
-Nominal power
-Reduced power
T 127 °C
T 72 °C
T 161 °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

CONTENTS
CONTENTS ........................................................................................................................................................................ 3
INTRODUCTION................................................................................................................................................................. 1
IMPORTANT SECURITY INSTRUCTIONS ............................................................................................................................... 1
SOME PRECAUTIONS........................................................................................................................................................ 1
DESTINATION OF USE ....................................................................................................................................................... 1
INSTALLATION REGULATIONS ............................................................................................................................................ 2
HEALTH AND SAFETY........................................................................................................................................................ 2
THE THERMO STOVE, THE PELLETS AND WOOD........................................................................................................ 2
THERMO STOVE COMPONENTS ......................................................................................................................................... 2
CLEARANCE ..................................................................................................................................................................... 5
CONNECTIONS DATA SHEET .............................................................................................................................................. 6
TECHNICAL FEATURES...................................................................................................................................................... 7
PELLET FEATURES............................................................................................................................................................ 7
WOOD FEATURES............................................................................................................................................................. 8
REQUIREMENTS OF THE PLACE OF INSTALLATION................................................................................................... 9
POSITIONING.................................................................................................................................................................... 9
SPACES AROUND AND ABOVE THE THERMO STOVE............................................................................................................. 9
EXTERNAL AIR VENT ......................................................................................................................................................... 9
FLUE AND CONNECTION TO THE SAME ............................................................................................................................. 10
CHIMNEY ....................................................................................................................................................................... 11
CONNECTIONS................................................................................................................................................................ 12
ELECTRICAL CONNECTION .............................................................................................................................................. 12
CONTROL OF ANY COUPLED BOILER ................................................................................................................................ 12
CONTROL OF ANY 3-WAY VALVE FOR THE DHW CIRCUIT .................................................................................................. 13
HYDRAULIC CONNECTION ............................................................................................................................................... 14
COMMISSIONING ............................................................................................................................................................ 14
FILLING THE SYSTEM FOR THE FIRST TIME........................................................................................................................ 14
PELLET LOADING AND CONNECTION TO THE ELECTRIC NETWORK...................................................................................... 15
THERMO STOVE CONTROL PANEL.................................................................................................................................... 15
THE BUTTONS ................................................................................................................................................................ 16
THE LEDS..................................................................................................................................................................... 16
DISPLAY DURING THE WORK PHASE................................................................................................................................. 17
FUNCTIONING PRINCIPLE ................................................................................................................................................ 17
IGNITION OF THE THERMO STOVE (WOOD SIDE) ............................................................................................................ 18
BOILING ......................................................................................................................................................................... 19
IGNITION OF THE THERMO STOVE (PELLET SIDE)........................................................................................................... 19
THERMO STOVE WORKING MODE (PELLET SIDE) ........................................................................................................... 20
SWITCH-OFF OF THE THERMO STOVE (PELLET SIDE)..................................................................................................... 20
MODIFYING SET TEMPERATURE....................................................................................................................................... 21
PRODUCING DOMESTIC HOT WATER (PREPARED MODELS ONLY)....................................................................................... 21
CHRONO-THERMOSTAT .................................................................................................................................................. 21
SAFETY DEVICES............................................................................................................................................................ 23
USEFUL INFO….............................................................................................................................................................. 24
CLEANING AND MAINTENANCE ................................................................................................................................... 25
PRECAUTIONS BEFORE CLEANING ................................................................................................................................... 25
ROUTINE CLEANING (PELLET SIDE) .............................................................................................................................. 25
ROUTINE CLEANING (WOOD SIDE)................................................................................................................................ 28
EXTRAORDINARY CLEANING (PELLET SIDE) .................................................................................................................. 28
EXTRAORDINARY CLEANING (WOOD SIDE).................................................................................................................... 30
YEARLY CLEANING.......................................................................................................................................................... 30

CLEANING THE CERAMIC GLASS ...................................................................................................................................... 32
CLEANING THE FLUE....................................................................................................................................................... 32
MAINTENANCE OF THE BOILER UNIT................................................................................................................................. 33
C.A.T MAINTENANCE ..................................................................................................................................................... 33
PCB PARAMETERS ........................................................................................................................................................ 34
MAIN WORDING ON THE DISPLAY ............................................................................................................................... 35
WIRING DIAGRAM........................................................................................................................................................... 36
WHAT HAPPENS IF......................................................................................................................................................... 37
WARRANTY CONDITIONS.............................................................................................................................................. 38
Dear Customer,
First of all we would like to thank you for choosing a “KLOVER” product and we hope you will be satisfied with this
product.
Please read the warranty certificate carefully. This is found on the last page of this User Guide. Please contact the
authorised Technical Assistance Centre (TAC) for the initial start-up of your stove and to validate the warranty.
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!
Certificate number : KIWA 00007/023 B - KIWA 00007/024 B
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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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
INTRODUCTION
Important security instructions
Read these instructions before installing and using the product.
-Thermo stove installation and commissioning must be performed by skilled staff aware of the importance of
respecting the Safety Standards in force. They will be responsible for the definitive installation of the machinery and
its consequent proper functioning.
KLOVER Srl will not be held responsible if these precautions are not respected.
-During installation of the appliance all local regulations, included those referring to National and European Standards,
must be followed.
-Connect the product flue gas outlet to a flue that has the features given in the Connections section in this user guide.
-The appliance is not suitable for the installation on a shared flue system.
-If the flue should catch fire, you must be provided with appropriate systems for damping down the fire or call the fire
service.
-Connect the product to sockets with earth. Avoid using sockets controlled by switches or automatic timers.
-Do not use a damaged or worn power supply cable.
-If a multiple socket is used, make sure that the total voltage of the connected devices does not exceed that
supported by the socket. Furthermore make sure that the total voltage of all these devices connected to the socket
does not exceed the maximum level accepted.
-Do not use flammable substances to clean the appliance and its elements.
-Do not leave containers and flammable substance in the place where the thermo stove is installed.
-Do not use the appliance as an incinerator or in any other way different to that for which it has been designed.
-Do not use fuels different to those which are recommended
-Do not use liquid fuels
-The external surfaces of the appliance reach high temperatures when it is running; operate with caution in order to
avoid burns.
-Only use original spare parts recommended by the manufacturer.
-Do not perform any unauthorised modification to the appliance.
-The use of poor pellets/wood or any other material can lead to damage of the thermo stove functions and can also
make the warranty null and void and make the manufacturer exempt from all responsibility.
-The Klover pellet products are not suitable for use in smokeless zones.
Some Precautions
-Do not touch the hot components of the product (ceramic glass, flue pipe) during normal functioning
-Use the appropriate button to switch the electrical panel off. Do not disconnect the power supply cable while the
thermo stove is running.
-Keep children away from the thermo stove when it is running since they could get burned by touching its hot
components.
-Children and inexperienced people are not allowed to use the appliance
-NEVER open the door of the thermo stove while it is running
Destination of use
The thermo stove works exclusively with wood pellets and wood and only with the hearth door shut. Never open
the door when the appliance is running.
The thermo stove has a DOUBLE COMBUSTION system that guarantees an extraordinary efficiency average and
“clean” flue gas exhaust with an emission of CO in the atmosphere which is among the lowest in Europe.
Do not use the thermo stove in disagreement with the indications contained in this user guide. The thermo
stove is an indoor product.
This user guide is integral part of the thermo stove.
If the product is transferred the user must give this manual to the new purchaser.

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
KLOVER S.R.L. DECLINES ANY RESPONSIBILITY IN CASE OF ACCIDENTS DUE TO THE FAILURE TO COMPLY
WITH THE SPECIFICATIONS OF THIS MANUAL.
FURTHERMORE KLOVER S.R.L. DECLINES ANY RESPONSIBILITY DUE TO INCORRECT USE OF THE
PRODUCT BY THE USER, MODIFICATION AND/OR UNAUTHORISED REPAIRS, USE OF NON - ORIGINAL SPARE
PARTS OR SIMPLY NOT SPECIFIC FOR THIS PRODUCT.
KLOVER S.R.L. IS NOT RESPONSIBLE FOR INSTALLATION OF THE THERMO STOVE. THE INSTALLER IS THE
ONLY PERSON RESPONSIBLE FOR THIS OPERATION AND HE IS ALSO ENTRUSTED WITH CHECKING THE
FLUE, THE EXTERNAL AIR VENT AND THE CORRECTNESS OF THE SOLUTIONS SUGGESTED FOR
INSTALLATION. ALL THE SAFETY STANDARDS CONTAINED IN THE SPECIFIC LAW IN FORCE OF THE STATE
WHERE THE THERMO STOVE IS INSTALLED MUST BE RESPECTED.
EXTRAORDINARY MAINTENANCE MUST ONLY BE PERFORMED BY AUTHORISED AND QUALIFIED STAFF
For the validity of the warranty, the user must comply with the provisions contained in this guide and in
particular:
-Use the thermo stove according to its operational limits;
-All maintenance must be performed constantly;
-Only authorise expert and competent people to use the thermo stove.
Failure to comply with the requirements of this guide makes the warranty automatically null and void.
Installation Regulations
These operating and instructions cover the basic principles to ensure the correct installation of the pellet stove, although
particulars may need modification to reflect local site conditions. In all cases the installation must comply with current
Building Regulations, Local Authority By-laws and other regulations that affect the installation of the stove.
The Building Regulations requirements can be met by adopting the relevant recommendations given in British Standards
BS 8303, BS 6461 and BS 7566 as an alternative means to achieve an equivalent level of performance to that obtained
by following the guidance given in Approved Document J.
Health and Safety
Care must be taken when installing a Klover pellet stove to ensure that the requirements of the Health and Safety at
Work Act are met.
Handling Adequate facilities must be available for loading, unloading and site handling the appliance bearing in mind the
weight of the appliance.
THE THERMO STOVE, THE PELLETS AND WOOD
Thermo stove Components
SYSTEM AIR
VENT
JOLLY
SYSTEM
PRESSURE
MANOMETER
HEATING
SYSTEM PUMP
INSPECTION LID
OPENING KNOB
SICURO TOP
RIGHT UPPER VIEW

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
MASTER SWITCH, POWER
SUPPLY CABLE CONNECTION
AND TWO INCORPORATED
FUSES (4A 250V)
SECURITY
THERMOSTAT
MANUAL RESET
ROOM THERMOSTAT
CONNECTION CLAMP
BOILER BODY
WATER DRAIN COCK
RETURN
ATTACHMENT
CIRCULATION
KNOB
INSPECTION LID
OPENING KNOB
SICURO TOP
HEATING SYSTEM
LOADING COCK
BOILER BODY
LOADING COCK
PALLET SIDE FLUE
GAS PASS
CLEANING KNOB
AIR INTAKE PIPE
(PELLET SIDE)
SAFETY VALVE
CALIBRATED
AT 2.5 bar
LEFT UPPER VIEW
WOOD SIDE
COMBUSTION
REGULATOR

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
The thermo stove is delivered with the following equipment:
-1 USE, INSTALLATION AND MAINTENANCE GUIDE;
-1 POWER SUPPLY CABLE;
-1 LARGE STRAIGHT BRUSH FOR CLEANING THE FLUE PIPE;
-1 WOOD SIDE FLUE GAS PASS CLEANING BRUSH;
-1 INFRA-RED REMOTE CONTROL.
FLOW CONNECTION
WITH
CHECK VALVE
DOMESTIC COLD WATER
INLET (ONLY ON MOD.
WITH SET-UP)
+ SYSTEM LOAD AND
BOILER BODY
BOILING
DISCHARGE
CONNECTION
DOMESTIC HOT WATER
OUTLET (ONLY ON MOD.
WITH SET-UP)

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
Clearance
820
215
228
600
1080

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
Connections data sheet
R
MA
X
REAR VIEW
C
F
180
250
455
500
580
820
70
110
80
140
160
1140
M= Ø 3/4" F SYSTEM DELIVERY
R= Ø 3/4" M SYSTEM RETURN
C = Ø 14 mm DOMESTIC HOT WATER OUTLET (on prepared models only)
F= Ø 14 mm DOMESTIC COLD WATER INLET
A= Ø 44 mm AIR SUCTION DEVICE (pellet side)
X= Ø 3/4" M BOILING DISCHARGE

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
Technical features
Total nominal heat input
kW (Kcal/h)
33,2 (28.600)
Pellet nominal heat input
kW (Kcal/h)
16,5 (14.200)
Wood nominal heat input
kW (Kcal/h)
16,7 (14.400)
Total nominal thermal output
kW (Kcal/h)
27,7 (23.800)
Pellet nominal thermal output
kW (Kcal/h)
15 (12.900)
Wood nominal thermal output
kW (Kcal/h)
12,7 (10.900)
Total nominal power released to heating water
kW (Kcal/h)
20,4 (17.500)
Pellet nominal power released to heating water
kW (Kcal/h)
10,7 (9.200)
Wood nominal power released to heating water
kW (Kcal/h)
9,7 (8.300)
Total nominal power delivered to room due to radiation
kW (Kcal/h)
7,3 (6.300)
Pellet nominal power delivered to room due to radiation
kW (Kcal/h)
4,3 (3.700)
Wood nominal power delivered to room due to radiation
kW (Kcal/h)
3 (2.600)
Pellet efficiency at thermal nominal power (reduced)
%
90,8 (90,7)
Wood efficiency at thermal nominal power
%
76,3
Nominal voltage
V
230
Nominal frequency
Hz
50
Expansion vessel litres/preloading bar
8 / 1
Maximum operating/recommended pressure
bar
2,5 / 1,5
CO at 13% oxygen at pellet nominal thermal power (reduced)
%
0,025 (0,042)
CO at 13% oxygen at wood nominal thermal power
%
0,16
Minimum chimney draught at pellet nominal thermal power
Pa
12
Minimum chimney draught at wood nominal thermal power
Pa
12
Combustion gas mass at pellet nominal thermal power
g/s
15,17
Combustion gas mass at wood nominal thermal power
g/s
21,85
Average exhaust flue gas temperature at pellet nominal thermal power
°C
127
Average exhaust flue gas temperature at wood nominal thermal power
°C
161
Pellet tank capacity
Kg
30
Boiler body capacity
litres
50
Width
mm
820
Height
mm
1080
Depth
mm
600
Minimum safety distance from flammable materials
mm
200
Weight of version with majolica sides (steel sides)
Kg
290 (280)
The given heat power can change according to the pellet and wood used.
Pellet features
The thermo stove has been tested with all types of pellets present on the market. The pellets used must have the
following features:
-Diameter 6 mm;
-Maximum length 35 mm;
-Maximum humidity content 8 –9 %;
-100 % wood. Total absence of additives.
-1.1 % maximum ash residue
For good thermo stove efficiency, we recommend the use of good quality pellets. Pellets must be poured into the tank
using a shovel and not directly from the bag.
In order to recognise pellet of quality it is necessary that:
-It is manufactured with constant diameter cylinders and it has a smooth and glossy surface;
-There is not a lot of sawdust inside the packaging;

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
-If the pellet is poured into a container of water it will tend to sink if it is a quality pellet, while if it is not, it will tend to
float;
-The conditions of the quality certification and in particular the compliance with international Standards such as EN
14961-2 Wood pellet class A1-A2 (maximum moisture level of 10%), should be indicated on the packaging;
-Packages are intact since pellets tend to absorb humidity. Humidity not only reduces the calorific value and increases
exhaust gas, but it also swells the product which could create problems in the thermo stove.
International Standards must be respected for the manufacturing of pellets as in France, Austria, Germany and recently
some countries from Eastern, also must comply with the EN14961-2, DIN 51731 and the O-NORM M7135 Standards in
the production phase. These Standards establish the minimum values in order to check pellet quality. In Italy there is no
official Standard, but it is recommended to use pellets that respect the previously-mentioned Standards.
The use of poor pellets or pellets made of any other material can lead to damage of the thermo stove functions
and can also make the warranty null and void and make the manufacturer exempt from all responsibility.
In order to guarantee combustion without problems the pellets must be kept in a dry place.
Wood features
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 winter. The correct seasoning (at least 2 years) allows to have a fuel with excellent
yield and not very polluting.
It must be kept in covered, well-aired places, already cut appropriately into pieces suitable for the hearth of the thermo
stove.
The wood is divided into softwood and hardwood on the basis of the weight in kg of a cubed metre of material. A
softwood that weighs about 300-350 kg/m3 is fir, pine, poplar, European alder, chestnut, willow, while hardwood that
weighs about 350-400 kg/m3 is beech, ash, carpine, acacia and oak.
Softwood ignites easily, is consumed quickly and develops a long flame and is used in ovens that require a long flame
pass. Hardwood is more compact, the combustion is slower with short flame, 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 the same and the features regarding the drying time and the calorific value vary from plant to
plant. The calorific value depends on the level of humidity and its density. Woods of excellent quality are beech, carpine
ash and acacia.
Avoid resinous woods.
The calorific value of the different types of woods depends a lot on their humidity and consequently the power of the
thermo stove 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 depending on its humidity.
% of humidity
Calorific value kcal/kg
15%
3490
20%
3250
25%
3010
30%
2780
35%
2450
40%
2300

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
REQUIREMENTS OF THE PLACE OF INSTALLATION
Positioning
The initial phase for better installation of the thermo stove is that of identifying its best location. Evaluate the following
elements to do this:
-Possibility of creating an external air vent;
-Possibility of creating a straight flue and possibly coaxial at the thermo stove outlet;
-Possibility of creating piping necessary to discharge boiling;
-Proximity to the main liquid collector and /or the boiler if one already exists);
-Proximity or ease of connection to the water system;
-Ease of access for cleaning the thermo stove, the flue gas exhaust pipes and the flue.
The thermo stove must be installed on a floor with suitable load capacity. If the existing building does not fulfil this
requirement appropriate measures (e.g. load distribution plate) must be taken.
Once the best location for the appliance is determined, it is possible to position the thermo stove, following the
indications below.
Spaces around and above the thermo stove
The figure below indicates the minimum measurements to respect when positioning the thermo stove according to the
walls.
PARETE POSTERIORE
PARETE LATERALE
PARETE LATERALE
50 cm 50 cm
20 cm
REAR WALL
SIDE WALL
SIDE WALL
Any shelves or suspending ceilings assembled above the thermo stove must be at least 110 cm away from the upper
part of the same.
External air vent
While it is running the thermo stove withdraws air from the environment in which it is installed; It is essential that the air
is restored through an external air vent.
If the wall behind the stove is an outside wall, make a 20 cm diameter hole (minimum section 100 cm2of free surface) at
20 cm from the ground (as Fig. A).
Furniture and mobile objects must be positioned at least 15 cm from the thermo stove sides walls; these objects must be
moved when servicing the thermo stove.
It is forbidden to hang shelves or build suspended ceilings above the thermo stove at a distance measuring less than
110 cm.
Protect all structures that can catch fire from heat radiation.
The hole must be protected externally with a fixed grid. Periodically check that the grid is not obstructed by leaves
or similar, thus blocking the air passage.
If it is not possible to realise the air vent in the wall behind the thermo stove, make the hole in a perimeter wall where the
thermo stove is installed.

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
If it not possible to realise the external air vent in the same room where the thermo stove is installed, this hole can be
made in an adjoining room as long as this room communicates permanently, by means of a transit hole (20cm minimum
diameter).
The UNI 10683 Standard PROHIBITS the withdrawal of combustion air from garages, combustible material
warehouses, or from activities where there is a fire hazard.
Do not connect the external air vent to the thermo stove through piping. If there are other heating or suction
appliances in the room, air vents must guarantee an air volume necessary for the proper functioning of all
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 thermo stove must be installed.
Extractor fan can cause functioning problems to the thermo stove when they are installed in the same room or space
where the appliance is found.
Fig. A
20
Flue and connection to the same
The Flue is a fundamental component for correct functioning of the thermo stove. The minimum section of the flue must
be that indicated in the thermo stove technical features (180 mm). Each thermo stove must be equipped with its own
flue, without other intakes (boilers, chimneys, stoves etc…). Flue dimensions are closely related to its height, which must
be measured from the thermo stove flue gas outlet to the chimney base. In order to guarantee draught, the chimney flue
outlet surface must be twice as big as the flue section. The combustion products exhaust pipe, generated by the forced
draught appliance, must respond to the following requisites:
-Combustion products sealed, waterproof and suitably isolated and insulated in the same way as the conditions
of use (cf UNI 9615);
-Realised with suitable materials in order to resist to normal mechanical stress, heat, action of the combustion
products and in the event of condensation;
-Upward alignment after the vertical tract throughout the remaining pathway with 20% minimum gradient.
-Preferably circular internal section: squared and rectangular sections must have rounded angles with radius
larger than 20 mm;
-Constant, free and independent internal section;
-Rectangular sections with 1:5 maximum ratio between the sides
-If the flue is installed externally it is absolutely necessary that it is insulated in order to avoid the flue gas cooling
and the formation of condensate;

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
-For the assembly of the flue gas pipes (which go from the appliance to the flue inlet) elements of non-
combustible material must be used, which are suitable for resisting combustion products and their
condensation;
-It is forbidden to utilise fibre cement pipes to connect the appliances to the flue;
-Flue pipes must not pass through places in which the installation of combustion appliances is forbidden;
-The assembly of flue pipes must be performed in a way to guarantee the sealing against flue gas for the
appliance functioning conditions in low pressure;
-The assembly of horizontal tracts is forbidden;
-It is forbidden to use tilted elements;
-The flue gas pipe must allow the recovery of soot or be cleanable and must have a constant section;
-It is prohibited to make other air intake channels and pipes, for plant engineering, transit inside the flue gas
pipes, even if over-dimensioned.
ATTENTION: IT IS PROHIBITED TO INSTALL DRAUGHT REGULATION VALVES (BUTTERFLY VALVES).
WE RECOMMEND INSTALLING A PIPE WITH AN INSPECTION OPENING AT THE FLUE GAS OUTLET OF THE
THERMO STOVE TO MAKE IT EASIER TO CLEAN THE FLUE GAS PIPES AND THE OUTLET OF THE THERMO
STOVE.
O180
0,5 M ABOVE
AT LEAST
THE RIDGE
3
MINIMUM METRES
INSULATION
0,5
MINIMUM
METRES
TEE WITH CONDENSATE DRAIN
O180
The flue can not be realised with horizontal tracts. The flue must be realised with pipe with a diameter of 180 mm in
stainless steel, appropriately isolated and insulated.
The connection to the flue must be sealed.
When realising the flue, there must not be more than 2 direction changes, including the initial T-shaped fitting.
Chimney
The chimney is a device crowning the flue, used to ease dispersion of combustion products.
TEE WITH
CONDESATE DRAIN
INSULATION
MINIMUM 3 METRES
MINIMUM
0,5
METRES
AT LEAST
0,5 mt ABOVE THE
RIDGE
Ø 180

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BI-FIRE MID PELLET AND WOOD BOILER STOVE
EN - Rev. 1.8
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.
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:
FURTHER SPECIFICATIONS TO BE CONSIDERED:
-IT IS MANDATORY TO REALISE A FIRST VERTICAL TRACT OF AT LEAST 0.5 METRES IN ORDER TO
GUARANTEE CORRECT FLUE GAS EXPULSION.
-Fix the pipes to the wall with the relevant metal collars in order to prevent any vibrations.
CONNECTIONS
Electrical connection
The electric connection must only be performed by qualified staff, with respect to all general and local Safety Standards
in force.
Check that the power supply voltage and frequency correspond to 220V –50 Hz.
Appliance safety is obtained when the same is correctly connected to an efficient earth plant.
In the electric connection to the mains power supply, envision a differential magnet circuit breaker switch at 6 A –Id 30
mA with relevant breaking load. The electric connections, including the earth, must be made after the voltage has been
removed from the electric plant.
When realising the system remember that the cables must be placed in an unmovable and away from parts subject to
high temperatures. During the final wiring of the circuit, only use components with a suitable electric protection rating.
KLOVER srl declines all responsibility for injury to persons, animals or damage to objects deriving from the
failure to connect the network to earth and failure to comply with the IEC Standards.
The electronic control unit manages and controls all thermo stove functions always assuring excellent functioning of the
entire appliance.
Control of any coupled boiler
If the thermo stove is to be coupled with another boiler already installed in the system (e.g. wall-hung gas boiler), it must
be ensured that when the pellet/wood thermo stove functions for the heating system, the boiler stops. This is so that the
calories in the two appliances installed in the system to not have to be added. This is why our set-up intervenes on the

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coupled boiler when the thermo stove heating pump starts. In this way, there will never be two boilers functioning
simultaneously in the same system. The coupled boiler will always be able to be used for the production of domestic hot
water.
The two wires prepared on the back of the thermo stove (blue and brown wires), on outlet they will have a
voltage of 220 V when the thermo stove pump functions, no voltage when the pump is at a standstill.
It is therefore easy to connect the two wires to a relay that will control the Room Thermostat inlet of the coupled boiler.
Control of any 3-way valve for the DHW circuit
The thermo stove is equipped with a control as per standard for any motorised 3-way valve to be installed on the
domestic hot water circuit. A cable with 4 wires escapes from the rear part of the thermo stove, which can be used to
control this valve. The four wires in the cable have different colours, precisely:
Blue wire = COMMON TO 3-WAY VALVE
Black wire = THERMO STOVE SIDE
Brown wire = GAS BOILER SIDE
Yellow/green wire = EARTH
Below find a connection example using a 3-way valve with spring return. Remember that the hydraulic connection must
be made in a way that when the valve is at rest, the water passes from the gas boiler. Only when the thermo stove
temperature is sufficient (value set from control panel), the 3-way valve is powered and therefore closes the gas boiler
circuit and opens the thermo stove circuit.
BROWN
YELLOW/GREEN
BLUE
BLACK
3-WAY VALVE
with spring return
TYPE 1
closing phase
neutral/common
opening phase
earth mass
N.B.: the brown wire can be used to control any service relay.

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EN - Rev. 1.8
Hydraulic connection
The hydraulic connections must be made in a rational way using the connections on the thermo stove template. To ease
connection of the pipes, we have prepared all hydraulic connections on the rear, leaving space to make the connections
easily.
The thermo stove can be coupled to any other boiler already installed in the system; naturally it is indispensable to insert
the due safety devices and shut-offs according to the system used.
N.B.: The thermo stove can be installed with closed expansion vessel as long as it is equipped with fuel loading
stop device, safety manual rearm thermostat and acoustic alarm and SICURO top system, which intervene if the
temperatures are too high.
The thermo stove can be installed in the same room as another boiler as long has this has a sealed chamber.
THE THERMO STOVE MUST BE INSTALLED EXCLUSIVELY BY QUALIFIED STAFF. SCRUPULOUSLY COMPLY
WITH THAT STATED IN THIS GUIDE;
ALL LIABILITY IS DECLINED FOR DAMAGE CAUSED BY INCORRECT MOUNTING.
THE NETWORK WATER INLET PRESSURE MUST NEVER EXCEED 3 BAR; RECOMMENDED WORK PRESSURE:
1.2 BAR.
DO NOT PASS ELECTRIC CABLES IN THE IMMEDIATE VICINITY OF THE FLUE GAS PIPE, UNLESS THEY ARE
INSULATED WITH SUITABLE MATERIALS.
IF THE WATER HAS HARDNESS THAT EXCEED 28 °f AN ANTI-LIME SCALE DEVICE MUST BE INSTALLED.
THIS MUST BE CHOSEN ON THE BASIS OF THE FEATURES OF THE WATER.
COMMISSIONING
Filling the system for the first time
After having connected the thermo stove, fill the system as follows:
-Check pipe sealing, of the expansion vessel and the circulation pump;
-Open the ball valve in order to fill the system. Act very slowly to allow the air to escape from the thermo stove
through the air vent valve; the best work pressure is 1.2 bar;
-If necessary, very slowly loosen the pump bleeding plug, making the fluid flow for a few seconds;
-Bleed all radiators and any other deaeration systems present in the system in order to ensure that there are no air
bubbles;
-Open the ball valve to fill the body of the boiler so that the exchangers are completely inside the thermo stove water.
-When the body of the boiler has been filled, close the ball valve. This valve will need to be opened to integrate the
water content inside the body of the boiler should the lettering “NO H2O” appear on the display.
When installation has been completed, for the first days of functioning it is recommended to check the tightness of all
hydraulic joints.
In intensely cold periods it is good practice that the heating system remains running. In the case of prolonged
absence, anti-freeze must be added to the heating water and that inside the boiler body.
In a system subject to being emptied frequently it is indispensable that filling is performed with water that has been
appropriately treated to eliminate hardness that can lead to lime scale deposits.
NEVER RUN THE THERMO STOVE WITHOUT WATER IN THE BOILER BODY BECAUSE, AS WELL AS NOT
HEATING, FUNCTIONING AND DURATION OF THE SAME COULD BE COMPROMISED.
DO NOT USE DISTILLED WATER.
NEVER EMPTY THE WATER INSIDE THE THERMO STOVE SO AS NOT TO COMPROMISE THE DURATION OF
THE SAME.

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Pellet loading and connection to the electric network
Perform the following operations:
-Fill the pellet tank; for commissioning it is recommended to pour a handful of pellets into the brazier in order to
prevent the time necessary for filling the entire screw feed channel (this operation must be performed every time the
thermo stove remains without pellets);
-Connect the thermo stove to the electric plant using the cable supplied;
-Place the switch positioned on the rear of the thermo stove at “׀” (on);
-Switch the thermo stove on using the relevant ignition key on the control panel. See the instructions below.
It is recommended to use top quality pellets so as not to compromise the functionality of the thermo stove itself.
Damaged caused by out-of-date pellets are not covered by the warranty.
Thermo stove control panel
The thermo stove control panel manages all of the circuit board functions, which make the thermo stove operate.
It is therefore possible to:
-Switch the thermo stove on and off;
-Select the power level of the thermo stove;
-Program the weekly chrono-thermostat;
-Check the temperature in the boiler, the flue gas temperature and all LEDs of the various functioning devices (water
pump, flue gas intake device, ignition resistance, pellet load screw feed,…);
-Display the alarms produced.
The thermo stove is supplied with the remote control, as per standard, that can perform the following operations:
-SWITCH ON/OFF;
-INCREASE/DECREASE POWER;
-INCREASE/DECREASE TEMPERATURE.
The thermo stove must only be used after this user guide has been read completely.