klover DH Quick start guide

ENGLISH
Pellet wood-
burning
thermo-stove
DUAL
INSTALLATION, USE, MAINTENANCE
AND HELPFUL TIPS
Main Revision 1.0
FPH_supplement:

PELLET WOOD-BURNING THERMO-STOVE DUAL
EN - Rev. 1.0
SERVICE DECLARATION
Ref. Annex III EU Regulation no. 305/2011
DoP/KLOVER-037
1. Identification number
:
DH
2. Model and/or lot no. and/or serial no. (Art.11-4)
:
DUAL
3. Intended use of the product according to the relevant
harmonised technical specification
:
Home heating appliance fuelled by 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 1880
ACTECO s.r.l.
I - 33084 Cordenons (PN) –Via Amman, 41
Number of test report (based on System 3)
:
1880-CPR-051-16 / 1880-CPR-051-002-16
1880-CRP-052-16 / 1880-CPR-052-002-16
8. Declared performances
HARMONISED TECHNICAL SPECIFICATION
EN 14785
EN 13240
PERFORMANCE FEATURES
PERFORMANCE
PERFORMANCE
Fire resistance
A1
A1
Distance from combustible material
R200 / L200 / B200 / F800 mm
R200 / L200 / B200 / F1000
mm
Fuel spillage risk
Compliant
Compliant
Emission of combustion products
-Nominal power
-Reduced power
CO at 13% of O2 0.005 %
CO at 13% of O2 0.040 %
CO at 13% of O2 0.093 %
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
16.1 kW (4.7 kW)
4.8 kW (1.9 kW)
11.2 kW (2.8 kW)
11.3 kW
4.8 kW
6.5 kW
Yield
-Nominal power
-Reduced power
ɳ 93.0 %
ɳ 94.4 %
ɳ 91.9 %
Flue gas temperature
-Nominal power
-Reduced power
T 108 °C
T 55 °C
T 119.9 °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), 05/04/2017
Mario Muraro
Chairman of the Board

PELLET WOOD-BURNING THERMO-STOVE DUAL
EN - Rev. 1.0
CONTENTS
INTRODUCTION ................................................................................................................................................................................................. 1
IMPORTANT SAFETY INSTRUCTIONS .................................................................................................................................................................. 1
THE MACHINE AND THE PELLETS................................................................................................................................................................ 2
COMPONENTS OF THE APPLIANCE .................................................................................................................................................................... 2
OVERALL DIMENSIONS ...................................................................................................................................................................................... 5
CONNECTIONS DATA SHEET.............................................................................................................................................................................. 6
TECHNICAL SPECIFICATIONS ............................................................................................................................................................................ 7
PELLET PROPERTIES......................................................................................................................................................................................... 8
TYPES OF WOOD............................................................................................................................................................................................... 8
REQUIREMENTS OF THE PLACE OF INSTALLATION............................................................................................................................. 10
POSITIONING................................................................................................................................................................................................... 10
SPACES AROUND AND ABOVE THE APPLIANCE................................................................................................................................................10
EXTERNAL AIR INTAKE .................................................................................................................................................................................... 10
THE FLUE AND CONNECTION TO THE SAME.....................................................................................................................................................11
CHIMNEY ........................................................................................................................................................................................................ 13
ELECTRICAL CONNECTION..........................................................................................................................................................................14
CONTROL OF ANY COUPLED BOILER ...............................................................................................................................................................14
CONTROL OF A POSSIBLE THREE-WAY MOTORISED VALVE FOR THE DHW SYSTEM (ON PREPARED MODELS ONLY) ......................................15
CONNECTION TO THE ROOM THERMOSTAT ..................................................................................................................................................... 16
HYDRAULIC CONNECTION ...........................................................................................................................................................................16
THE DISPLAY ...................................................................................................................................................................................................17
THE MENU......................................................................................................................................................................................................... 20
INITIAL START-UP........................................................................................................................................................................................... 24
FILLING THE BOILER UNIT AND THE SYSTEM FOR THE FIRST TIME....................................................................................................................24
ANTIFREEZE PROTECTION ..............................................................................................................................................................................25
OPERATING PRINCIPLE ................................................................................................................................................................................... 25
IGNITION (WOOD SIDE)................................................................................................................................................................................25
BOILING ..........................................................................................................................................................................................................26
IGNITION (PELLET SIDE).............................................................................................................................................................................. 27
WORKING MODE FROM POWER 1TO POWER 5(PELLET SIDE)...................................................................................................................28
SWITCH-OFF CYCLE (PELLET SIDE) ............................................................................................................................................................ 28
WORKING MODE AT DHW OUTPUT (ON PREPARED MODELS ONLY)................................................................................................................ 29
MODIFYING THE WORKING POWER..................................................................................................................................................................29
CHANGE THE WATER TEMPERATURE OF THE HEATING SYSTEM...................................................................................................................... 29
REMOTE CONTROL.......................................................................................................................................................................................... 30
PROBLEMS, ALARMS, USEFUL ADVICES................................................................................................................................................. 30
USEFUL INFO…..............................................................................................................................................................................................30
WHAT HAPPENS IF…...................................................................................................................................................................................... 31
ALARM SIGNALS.............................................................................................................................................................................................. 32
CLEANING AND MAINTENANCE..................................................................................................................................................................32
PRECAUTIONS BEFORE CLEANING ..................................................................................................................................................................32
ORDINARY CLEANING (PELLET SIDE) ..........................................................................................................................................................32
ORDINARY CLEANING (WOOD SIDE) ............................................................................................................................................................ 35
EXTRAORDINARY CLEANING (PELLET SIDE) ................................................................................................................................................35
EXTRAORDINARY CLEANING (WOOD SIDE)..................................................................................................................................................37
ANNUAL CLEANING.......................................................................................................................................................................................... 38
CLEANING THE CERAMIC GLASS...................................................................................................................................................................... 40
CLEANING THE FLUE .......................................................................................................................................................................................40
MAINTENANCE ................................................................................................................................................................................................ 40
MAINTENANCE OF THE BOILER UNIT................................................................................................................................................................ 41
PCB PARAMETERS.........................................................................................................................................................................................42
WIRING DIAGRAM ...........................................................................................................................................................................................44

PELLET WOOD-BURNING THERMO-STOVE DUAL
EN - Rev. 1.0
WARRANTY CONDITIONS .............................................................................................................................................................................45
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.
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!
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 © 2017 KLOVER srl

PELLET WOOD-BURNING THERMO-STOVE DUAL
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INTRODUCTION
Important safety instructions
Please read these instructions before installing and using the product.
-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 product 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 wood pellets and logs and only with the hearth door shut.
-NEVER open the pellet-side door of the appliance during normal operation.
-The use of poor quality pellets or 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.
-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 product (ceramic glass, flue pipe) 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 product 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 PRODUCT 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 PRODUCT MODEL.
KLOVER S.R.L. SHALL NOT BE HELD LIABLE FOR THE STOVE’S INSTALLATION. 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

PELLET WOOD-BURNING THERMO-STOVE DUAL
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SAFETY REGULATIONS SET OUT IN THE SPECIFIC LAWS IN FORCE IN THE COUNTRY WHERE THE MACHINE
IS INSTALLED 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 MACHINE AND THE PELLETS
Components of the appliance
The table below shows the standard features of the appliance:
Expansion tank
8 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
Recirculation pump
Yes. Mod.25/70
Heating exchanger
Yes
DHW heat exchanger
On prepared models only
System loading cock
Yes
Boiler unit loading cock
Yes
Electrical setting for the connection of the domestic water flow switch
Yes
Infrared remote control
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.40-170 mm L.420 mm.
-No. 1 brush D.80-120 mm L.1280 mm.
-No. 1 fireside poker;
-No. 1 infrared remote control;
-No. 1 bottle 1 l “LONG LIFE” protective.

PELLET WOOD-BURNING THERMO-STOVE DUAL
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Boiler unit
loading cock.
Left side flue gas pass
scraper.
LH TOP TECHNICAL COMPARTMENT
TOP TECHNICAL COMPARTMENT Sicuro Top
Primary exchanger
(heating).
Boiling
discharge pipe
Sicuro top.
Level switch
(water level sensor).
Secondary exchanger
(DHW).
System loading
cock.
LH knob for opening
the inspection cover
SICURO TOP
RH TOP TECHNICAL COMPARTMENT
RH knob for opening
the inspection cover
SICURO TOP
Automatic air vent
valve (Jolly).
Pressure gauge
(indicates the
pressure of the
heating system).
Circulating pump speed
switch.
High-efficiency
circulating pump for
heating system.

PELLET WOOD-BURNING THERMO-STOVE DUAL
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REAR TECHNICAL
COMPARTMENT
Terminal for room thermostat
connection.
Boiler unit drain cock.
Inspection cap rear
pellet flue gas pipe.
Anti-interference filter
Main switch, connection for
power supply cable with 2
built-in fuses (4A 250V).
Safety thermostat with
manual reset.
Air intake pipe (pellet
side).
Delivery pipe connection
of the heating system with
check valve.
Return pipe connection of
the heating system.
Safety valve
calibrated to 2.5 bar
Domestic cold water inlet
connection (on prepared
models only) and boiler unit
and system load.
Boiling discharge
pipe connection.
Domestic hot water outlet
pipe connection (on
prepared models only).
BOTTOM FRONT VIEW
Secondary automatic combustion air
damper (wood side).
Turn anti-clockwise to OPEN.
Turn clockwise to CLOSE.
Primary manual combustion air
damper (wood side).
Move to the right to OPEN.
Move to the left to CLOSE.

PELLET WOOD-BURNING THERMO-STOVE DUAL
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Overall dimensions

PELLET WOOD-BURNING THERMO-STOVE DUAL
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Connections data sheet
Description of connections
M= System Delivery
3/4" F
R= System Return
3/4" M
F= Domestic cold water inlet (on prepared models only) and boiler unit and system load
14 mm
C= Domestic hot water outlet (on prepared models only)
14 mm
X= Safety valve drain
1/2" F
S= Boiling discharge
3/4" M
A = Intake pipe
43 mm
Sf = Flue gas outlet
180 mm M
E =Electricity connection
REAR VIEW

PELLET WOOD-BURNING THERMO-STOVE DUAL
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Technical Specifications
Total nominal heat capacity
kW (Kcal/h)
29.6 (25,550)
Pellet nominal heat capacity
kW (Kcal/h)
17.3 (14,900)
Wood nominal heat capacity
kW (Kcal/h)
12.3 (10,600)
Total nominal thermal power
kW (Kcal/h)
27.4 (23,500)
Pellet nominal thermal power
kW (Kcal/h)
16.1 (13,800)
Wood nominal thermal power
kW (Kcal/h)
11.3 (9,700)
Total power delivered to heating water
kW (Kcal/h)
17.7 (15,200)
Pellet power delivered to heating water
kW (Kcal/h)
11.2 (9,600)
Wood power delivered to heating water
kW (Kcal/h)
6.5 (5,600)
Total power delivered to room due to radiation
kW (Kcal/h)
9.6 (8,200)
Pellet power delivered to room due to radiation
kW (Kcal/h)
4.8 (4,100)
Wood power delivered to room due to radiation
kW (Kcal/h)
4.8 (4,100)
Pellet efficiency at nominal power (reduced)
%
93 (94)
Wood efficiency at nominal power
%
91.9
Nominal voltage
V
230
Nominal frequency
Hz
50
Expansion vessel litres/preloading bar
8 / 1
Maximum operating/recommended pressure
bar
2.5 / 1.5
Flue outlet diameter
mm
180
Air intake pipe diameter
mm
43
CO at 13% oxygen pellet at (reduced) nominal output
%
0.005 (0.04)
CO at 13% oxygen wood at nominal output
%
0.093
Pellet chimney minimum draught
Pa
10.7
Wood chimney minimum draught
Pa
6.2
Pellet combustion gas flow
g/s
12
Wood combustion gas flow
g/s
6.6
Pellet exhaust flue gas temperature
°C
107.8
Wood exhaust flue gas temperature
°C
119.9
Pellet tank capacity
Kg
30
Pellet min –max hourly consumption
Kg/h
1 –3.4
Hourly wood consumption
Kg/h
2.8
Boiler unit capacity
litres
50
Width
mm
870
Height
mm
1100
Depth
mm
630
Minimum safety distance pellet side from flammable materials
(side / rear / front)
mm
200 / 200 / 800
Minimum safety distance wood side from flammable materials
(side / rear / front)
mm
200 / 200 / 1000
Weight
Kg
330
* Power consumption only during the ignition cycle.
The appliance’s heat output may vary depending on the type of wood and pellets used.

PELLET WOOD-BURNING THERMO-STOVE DUAL
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Pellet properties
The appliance has been tested with all types of pellets available on the market. The pellets must have the following
properties:
-Diameter 6 mm.
-Maximum length 35 mm.
-Maximum humidity content 8 –9 %.
-100% wood. Totally additive-free.
-Maximum ash residue 1.1 %.
To obtain good performance from the appliance, we recommend using good quality pellets. Pellets should be poured
into the tank using a shovel, and not directly from the bag.
Good quality pellets should have the following properties:
-Constant diameter cylinders with a smooth, shiny surface;
-There should not be a lot of sawdust inside the packaging;
-After grabbing a bunch of pellets and placing them into a container filled with water, good-quality pellets will sink and
poor-quality ones will tend to float;
-The quality certification data, in particular conformity to international standards such as EN14961-2, DIN 51731 and
O-NORM M7135, should be indicated on the packaging;
-The packages should be intact since pellets tend to absorb humidity. Humidity not only reduces the calorific value
and increases the amount of flue gases expelled, but also causes swelling of the product which may create problems
with the appliance.
The production of pellets must be compliant with some international standards (such as EN14961-2, DIN 51731 and O-
NORM M7135) which establish minimum values for quality checks on pellets. To facilitate the right choice of the
combustible material you can find below one of the most common certification marks identifying the quality of the pellets:
The use of poor quality pellets or any other material can damage the appliance operation, voiding the warranty
and exempting the manufacturer from all liability.
In order to guarantee trouble-free combustion, the pellets must be stored in a dry place.
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 ovens requiring a long flame pass.
Hardwood is more compact, the combustion is slower with short flame, it lasts longer and is more suitable for domestic
Indication of the standard,
base reference for the quality
classes ENplus
Indication of the quality
class of the certified pellet
(preferable A1)
IT xxx
Code of the certified company
consisting of two elements:
-Symbol of the country of
production (example “IT”)
-Progressive number assigned at
the acquisition of the
certification (example "xxx")

PELLET WOOD-BURNING THERMO-STOVE DUAL
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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
appliance 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 %.
% of humidity
Calorific value kcal/kg
15%
3490
20%
3250
25%
3010
30%
2780
35%
2450
40%
2300

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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 and at least 800 mm with burning mode and 1000 mm with wood burning mode from the front of the
appliance.
Relocating the appliance should not be done by forcing on the handle, glass or ceramics.
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.
Spaces around and above the appliance
The figure below shows the minimum distances from walls or other not-easily-removable furniture, that need to be taken
into consideration when positioning the appliance.
Any shelves or false ceilings mounted above the appliance must be at least 110 cm away from the top part of it.
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.
Any extra intervention by the Authorised technical assistance centre, where it is necessary to disconnect the
device from the system, will not be recognised under warranty as described in chapter “Warranty Conditions”.
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 100 cm2
(round hole with minimum diameter of 20 cm protected with a special fixed large mesh grid).

PELLET WOOD-BURNING THERMO-STOVE DUAL
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If the wall behind the appliance is on the outside, we recommend you make the hole near it at about 20 cm above the
ground (see example in Fig. A).
If it is not possible to put an air vent in the wall behind the appliance, make a hole in a perimeter wall in the room where it
is installed. 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.
Do not connect the external air vent directly to the appliance through piping. 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.
Fig. A
20
The flue and connection to the same
The flue is an essential element for the efficient operation of the appliance. The flue must have a minimum cross-
sectional area as that indicated in the technical specifications of the appliance (180 mm). 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 surface of the chimney flue outlet must be double the flue 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%;
-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;

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-If the flue is installed externally, it must be insulated in order to prevent the flue gases from cooling and allowing
condensation to form;
-Parts made from non-combustible materials (it is absolutely prohibited the use of aluminium flue) - 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 gas conduits must not pass through rooms in which the installation of combustion devices is prohibited;
-The flue gas conduits 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:
SINO NO NO
FURTHER SPECIFICATIONS TO BE CONSIDERED
-The flue pipes inside the installation room must be made of a suitable material (see current regulations) and with a
minimum diameter of 180 mm.
-The pipes must have a double wall (thermally insulated) or be suitably insulated with rock wool. The
maximum temperature of the flue pipe inside the room must not exceed 70°C.
-IT IS MANDATORY TO HAVE AN INITIAL VERTICAL SECTION OF AT LEAST 0.5 MT IN ORDER TO
GUARANTEE CORRECT FLUE GAS DISCHARGE.
-Every direction change must be carried out with a T-shaped fitting and inspection cap. Secure the pipes to the wall
using suitable metal collars in order to prevent any vibrations.
-IT IS STRICTLY FORBIDDEN TO INSTALL DRAUGHT REGULATION VALVES (BUTTERFLY VALVES).
YES
NO
NO
NO

PELLET WOOD-BURNING THERMO-STOVE DUAL
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The flue must not have any horizontal sections. The flue must be made with 180 mm diameter stainless steel pipe,
suitably insulated and isolated.
The connection to the flue must be sealed.
When assembling the flue, there must be no 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.
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;
-It must be shaped in such a way as to prevent rainwater or snow from entering 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:

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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 220V –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.
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.
Control of any coupled boiler
If the pellet appliance is to be coupled with a previously installed boiler in the system (e.g. wall-hung gas boiler), you
must ensure that the standard boiler stops when the pellet appliance takes over the heating of the system. The electrical
setting, which is accessible from the rear technical compartment, intervenes on the standard boiler when the heating
circulating pump of the pellet appliance starts up so as to avoid having two boilers operating simultaneously on the same
system. The coupled boiler is however always available for the production of domestic hot water.
The two wires prepared on the back of the appliance (blue and brown wires) will have an output voltage of 220 V
when the pellet appliance pump is working, and no voltage when the pump stops.
It is therefore necessary to connect the 2 wires to a relay that will control the Room Thermostat (R.T.) input of the
coupled boiler (see the following example).
Technical
volume
Distance > 5 m
Distance < 5 m
Distance>1.85 m
Distance<1.85 m
Reflux
zone
1
m
m
i
n
i
m
o
1
5
°
0.5 m
0.5 m
0.5m above
The highest point

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Control of a possible three-way motorised valve for the DHW system (on prepared models only)
The pellet appliance is equipped as standard with a control for a possible 3-way motorised valve to be installed on the
domestic water circuit (for prepared models only). In the rear technical compartment of the appliance there are four wires
with fastons protected by a red seal, which can be used for controlling the valve (see also “wiring diagram”). The four
wires have different colours, and precisely:
-Blue wire = 3-WAY VALVE COMMON
-Black wire = PELLET APPLIANCE SANITARY SIDE
-Brown wire = GAS BOILER SANITARY SIDE
-Yellow/green wire = GND
Below there is an example of a connection using a 3-way valve with spring return. Remember that the hydraulic
connection must be made in such a way that when the valve is at rest, the water passes from the gas boiler. Only when
the appliance temperature is sufficient (see “Menu 5 – Three-way valve threshold”), the three-way valve is powered,
closing the gas boiler water circuit and opening the water circuit of the appliance.
N.B.: in the example above, the brown wire can be used to control a service relay.