ARTE MENTOR hydro Series Instruction Manual

TABLE OF CONTENTS
1. ARTE ® FIREPLACE - A GREEK QUALITY PRODUCT ...................................................................................................................................................... 1
2. Facts about the wood and the environment............................................................................................................................................................ 1
2.1. Why should I use wood? ........................................................................................................................................................................................................1
2.2. Buying firewood ......................................................................................................................................................................................................................1
2.3. Storing your wood...................................................................................................................................................................................................................1
2.4. Wood types and calorific value ...........................................................................................................................................................................................2
2.5. Determining the heat output ................................................................................................................................................................................................3
3. Endorsements and certifications ................................................................................................................................................................................. 3
3.1. Endorsement............................................................................................................................................................................................................................3
3.2. Features marking plate ..........................................................................................................................................................................................................3
4. Packaging ....................................................................................................................................................................................................................... 4
4.1. Unpacking the fireplace........................................................................................................................................................................................................4
5. Installation and fire safety ............................................................................................................................................................................................. 5
5.1. Height adjustment, leveling of the fireplace & door’s counterweights adjustment.....................................................................................................5
5.2. Safety distances ......................................................................................................................................................................................................................5
5.3. Wooden beams protection...................................................................................................................................................................................................5
5.4. General safety instructions ....................................................................................................................................................................................................5
5.5. Flue safety instructions............................................................................................................................................................................................................6
-Basic requirements for proper flue operation ........................................................................................................................................................................6
-Chimney placement..................................................................................................................................................................................................................6
-Chimney cap…………................................................................................................................................................................................................................7
5.6. Connecting the fireplace with the flue ...............................................................................................................................................................................8
5.7. Air intake connection.............................................................................................................................................................................................................8
5.8. Hot air abduction....................................................................................................................................................................................................................9
5.9. Connection with the heating system...................................................................................................................................................................................9
-Connection of supply - return.................................................................................................................................................................................................10
-Connection of control panel sensor......................................................................................................................................................................................10
-Overheating protection ..........................................................................................................................................................................................................11
-System with closed expansion tank when the fireplace is at the same level with the heaters....................................................................................12
-System with closed expantion tank .......................................................................................................................................................................................13
when the fireplace is below the heaters..................................................................................................................................................................................13
-System with open expansion tank .........................................................................................................................................................................................14
6. Operating Instructions ................................................................................................................................................................................................. 15
6.1. Before the first use of the ARTE® MENTOR fireplace ........................................................................................................................................................15
6.2. About ARTE® MENTOR fireplace.........................................................................................................................................................................................15
6.3. General information .............................................................................................................................................................................................................16
-When the fireplace paint dries...............................................................................................................................................................................................16
-Incineration preparation .........................................................................................................................................................................................................16
-Combustion air intake..............................................................................................................................................................................................................16
-Power failure…………...............................................................................................................................................................................................................16
-ADF function…………… ...........................................................................................................................................................................................................16
6.4. Usage of the detachable handle (“Cold handle”).........................................................................................................................................................17
6.5. Adjustment of combustion air.............................................................................................................................................................................................18
-Automatic regulator of the heating circuit for water heating fireplace with air intake control (RT-08G) ..................................................................18
-Using the regulator ...................................................................................................................................................................................................................19
-OPERATION screen ..................................................................................................................................................................................................................19
-SYSTEM OPERATION screem ....................................................................................................................................................................................................20
-MODE screen…………..............................................................................................................................................................................................................20
-TIMES ZONES mode...................................................................................................................................................................................................................21
-Secondary control relay function ..........................................................................................................................................................................................21
-TIME ADJUSTMENT SCREEN.......................................................................................................................................................................................................21
-PARAMETERS SETTING screen ..................................................................................................................................................................................................21
-ALARM screen …………………………………...........................................................................................................................................................................22
-Electrical installation.................................................................................................................................................................................................................22
7. Lighting the fireplace................................................................................................................................................................................................... 22
7.1. Traditional method of lighting .............................................................................................................................................................................................22
7.2. Lighting without CO emissions (FROM TOP TO BOTTOM) ................................................................................................................................................23
7.3. Safe handlings in case of wrong functioning ...................................................................................................................................................................23
In rare cases, even a test fire can cause not effective draft in the flue. In this case, call your chimney sweep..........................................................23
7.4. Smoke escape in the room, ................................................................................................................................................................................................23
8. Tertiary combustion...................................................................................................................................................................................................... 24
9. Cleaning and maintaining the fireplace.................................................................................................................................................................. 24
9.1. External maintenance..........................................................................................................................................................................................................24
9.2. Internal maintenance ..........................................................................................................................................................................................................25
-Ash disposal……………….........................................................................................................................................................................................................25
-Glass …………............................................................................................................................................................................................................................25
-Gasket………………….. ............................................................................................................................................................................................................26
-Internal parts that need maintenance .................................................................................................................................................................................26
9.3. Cleaning the fireplace and the flue ..................................................................................................................................................................................27
Chimney sweeping......................................................................................................................................................................................................................27

-Cleaning of heating water tubes...........................................................................................................................................................................................27
-Annual maintenance...............................................................................................................................................................................................................27
-How to clean the inside parts of ARTE® MENTOR ................................................................................................................................................................28
9.4. Internal parts..........................................................................................................................................................................................................................28
-Removal of baffle.....................................................................................................................................................................................................................28
-Removal of side vermiculites ..................................................................................................................................................................................................28
-Removal of back vermiculites ...............................................................................................................................................................................................28
-Removal of bottom vermiculites (Floor) ................................................................................................................................................................................29
-Removal of bottom vermiculites (Front side)........................................................................................................................................................................29
-Removal of diaphragm of the central water tank pipe.....................................................................................................................................................29
-Removal of flue gas baffles.....................................................................................................................................................................................................29
9.5. Drainage of water tank........................................................................................................................................................................................................30
9.6. Inactive fireplace for prolonged periods ..........................................................................................................................................................................30
10. Tips and tricks for resolving issues ............................................................................................................................................................................. 31
11. Dimensions and technical specifications............................................................................................................................................................... 32
12. Notes ............................................................................................................................................................................................................................ 34

INSTALLATION &USAGE MANUAL FIREPLACE | MENTOR Hydro
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1. ARTE ®FIREPLACE -AGREEK QUALITY PRODUCT
Thank you for buying an ARTE® fireplace - we believe that you will have as much pleasure from our product as we
have, producing it.
Your ARTE® fireplace is made in such a way, to extract the maximum possible energy from the wood with the minimum
possible emissions, using the most innovative technology and the most robust design –one product made in Greece!
These instructions contain interesting and informative facts and all you need to know about the subjects of heating,
wood, and operating your ARTE®fireplace. Please read these instructions carefully before using your fireplace for the
first time and keep them for future usage.
2. FACTS ABOUT THE WOOD AND THE ENVIRONMENT
2.1. Why should I use wood?
With proper forest management, burning wood does not deplete the earth’s resources. Heating with wood usually
does not contribute to global warming. The young trees that replace the trees that you burn in your fireplace absorb
carbon dioxide (CO2) from the air. Burning firewood releases only as much CO2as the tree has absorbed from the
atmosphere during its growth. Similarly, wood rotting in the forest generates the same amount of CO2as the same
wood burning.
Besides being environmentally friendly, the heat from a fireplace warms you like the warming rays of the sun during the
sunny winter days. It is the radiated heat that is transmitted by electromagnetic waves in the infrared range. Even
when the air is very cold you can feel the warm rays of the sun on your skin.
Another advantage of wood is that it is produced locally, which creates local employment, and more tax revenues
stay in the province.
2.2. Buying firewood
Where can I get my firewood?
Regenerated ready-to-burn firewood can be purchased from dealers:
Fireplace ready, stored for at least two years
Pre-dried, stored for one year
Fresh from the forest
Whether you have cut your own wood or bought it, the important thing is that: the wood should be dried for at least
two years before it is burned.
2.3. Storing your wood
The full potential for heat will not be
realized if you neglect the simple but
necessary chore of piling and protecting
your wood. Proper storage is essential to
avoid moisture, bacteria, and insect
problems in your home.
To avoid problems with insects and
moisture, store the wood as far from
your house as is practical. Do not store
wood in your basement; one cord of
wood (4 m3) can give off more than 500
liters of water. The basic rule is to protect
the wood from water, but not from the sun or wind (Pic. 2.3.1 & 2.3.2). Green wood will dry slowly or not at all if
unprotected, while seasoned wood left unprotected may become unseasoned.
The ideal residual moisture is 12 - 15% and should be no higher!
The manuals which are enclosed with the product must be kept throughout the
product’s entire service life. They are also available online in our website.
Pic. 2.3.1
Pic. 2.3.2

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There are three basic rules to follow when storing wood:
Allow air circulation by piling the wood alternately (one layer across –one layer
widthwise), if possible.
Protect wood from rain and snow by covering it with a tarp or woodshed roof. Otherwise,
place it under a shed with a wooden roof.
Pile wood off the ground on scrap lumber or wooden pallets.
The time-honored way to cure wood is to buck, split, and stack wood off the ground for
one full year. Although wood can generally be reduced to 20 per cent moisture content
in two to three months, the ideal 10% to 15% may take longer (almost 18 months).
2.4. Wood types and calorific value
A wood’s efficiency does not depend only on its type, but
also on its humidity, as well as the temperature of the
combustion chamber.
For more efficient and longer burning, without emission of
hazardous substances, woods must be dry. Ideally, their
humidity percentage must not exceed 10% to 15%.
If this percentage is over 20%, the wood is not burned
properly, whereas if the piece of wood has been cut
recently, the humidity is over 60% making it unsuitable for
burning. The reason for that is that the fire will be weak and
pale and will produce dense smoke, unburned tar and
creosote, soiling the ceramic glass and the flue.
It is preferable to get your wood supplies during the summer months and store them, to ensure better combustion
quality during the winter.
Useful tips
Always choose dry firewood.
Avoid wood that pops (chestnut, conifers such as cedar, spruce and pine), as they may damage your fireplace or the
flue.
Pay attention to the size of the logs. Good firewood must have been cut at least twice.
You should prefer oak, beech, olive wood, which is hard wood with high density since they will burn for longer.
Briquettes
They ignite very easily, and burn slowly. They are economically advantageous because you will burn smaller quantities
compared to common firewood and they are easily stored. Also, you have less quantity of ashes in comparison to
wood.
Birch
It’s a soft wood that ignites easily with great thermal energy production. It produces less smoke and ash compared to
other wood and burns silently. The same characteristics apply for lime and chestnut.
Beech
Hard wood is ideal for firewood but requires a high temperature to ignite. It weights a lot; it is dense and burns with a
calm and long fire for a longer time. Best when well seasoned. The same applies for oak, but seasoned for 2-3 years.
Every type of wood has its own calorific value.
Wood type
Briquette
Birch
Walnut
Oak
Beech
Fir
Common Oak
Pine
Olive
Calorific value
(Kcal/Kg)
5.000
4.800
4.731
4.619
4.578
4.588
4.548
4.457
4.100
860Kcal/h = 1 kW/h
Table 2.4.1
The values are based on 15% residual wood moisture.
An ARTE®fireplace can be fired with all of the above wood types.
WET
DRY

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2.5. Determining the heat output
There is not a specific rule that enables the calculation of the required heat output. This depends on the amount of
space that is required to be heated and mostly on its insulation. In average the required heat output for a properly
insulated room and with external temperature of 0οC is 40 kCal/h per m3.
Taking into account that 1kW equals 860 kCal/h an equivalent of 50W/m3can be used. For example, to heat a 150 m3
room (10 x 6 x 2.5m) in an insulated residence, the output required is 150m3x 50W/m3= 7500W or 7.5 kW.
So, for the main heating, a 10kW appliance is enough.
Indicative combustion
value with efficiency ~80%
Required amount relative
to 1kg dry wood
Fuel
Unit
kCal
kW
Firewood (moisture 15%)
kg
3600
4.2
1.00
Firewood (moisture 50%)
Kg
1850
2.2
1.95
Wood briquettes
Kg
4000
5.0
0.84
Coal briquettes
Kg
4800
5.6
0.75
Coal
Kg
7700
8.9
0.47
Coke
Kg
6780
7.9
0.53
Gas
m3
7800
9.1
0.46
Diesel
L
8500
9.9
0.42
Electricity
kW/h
860
1.0
4.19
Table 2.5.1
3. ENDORSEMENTS AND CERTIFICATIONS
3.1. Endorsement
The ARTE® fireplace you chose has been tested according to EN13229. The declaration of performance (DoP) of each
MENTOR model can be found at the URL of the company for each model.
3.2. Features marking plate
ARTE® fireplace’s feature marking plate is located on the right side of the appliance.

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4. PACKAGING
ARTE® is devoted in protecting the environment, so we use as much recyclable materials as possible and the least
amount of packaging materials without compromising the secure transfer of our products.
4.1. Unpacking the fireplace
1. Your product will be delivered on a wooden palette which is lined with wooden side panels (Pic. 4.1.1).
2. Firstly remove the side panels. (Pic. 4.1.2)
3. Because of sharp objects, carefully remove the plastic membrane and the waterproof plastic film and also all the
polystyrene on the outside and inside of the product.
4. Unscrew the 4 screws located on the bottom side of the product, in order to release the fireplace from the palette.
(Pic. 4.1.3)
Pic. 4.1.1
Pic. 4.1.2
Pic. 4.1.3
5. Carefully lift up the product and place it on the installation point, making sure that the floor can withstand the
weight of the device. Also, make sure you provide proper insulation in case the floor is built using flammable
materials.
For the lifting, use 2 shackles and a belt (Pic 4.1.4). (Not included inside the package). Information about the
weight of the device can be found at Table 11.2. The products that you will use for the lifting must be able to
lift up the device with safety.
If you bought the lifting system with the handles (Pic 4.1.5), place them at the corresponding sockets and
secure them with allen screws M6x10 (detail).
6. For safety reasons during transportation, the door is secured at the upper open position. To release the door,
remove the bottom, right and left hexagon screws, which fix the counterweights (Pic 4.1.6).
Pic. 4.1.4
Pic. 4.1.5
Pic. 4.1.6
The wheels which are fitted on the legs of the device, let you do small movements till
the final installation place.

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5. INSTALLATION AND FIRE SAFETY
During the installation of the fireplace, It is OBLIGATORY to respect the National and European rules and local
regulations concerning building matter and fireproof rules.
The installation MUST be inspected by a qualified auditor, prior to lighting the fireplace. Also, the appropriate local
authorities must be informed.
5.1. Height adjustment, leveling of the fireplace & door’s counterweights adjustment
Adjust the legs of the fireplace at the desired height, taking into account that the device must be leveled. Leveling is
important for the right function of the sliding door.
For the height adjustment, loosen the nuts which are located at the device’s legs, and rotate the adjustment screws
(Pic. 5.1.1). When you reach the desired height, tighten again the nuts. The distances that are shown in (Pic 5.1.2) must
be kept.
For the adjustment of the door’s counterweights, remove the right and left galvanized side covers. To remove them,
unscrew the down screws and pull the cover upwards (Pic. 5.1.3). By adding or removing plates evenly at the both
counterweights (right and left), you can affect the function of the door (Pic. 5.1.4). For safety reasons and well function
of the fireplace, the door (during its assembly at the factory) is set to close at low speed.
Pic. 5.1.1
Pic. 5.1.2
Pic. 5.1.3
Pic. 5.1.4
5.2. Safety distances
The combustion chamber opening must be AT LEAST 80cm away from any flammable
materials that are inside the heat radiation zone (Pic. 5.2.1).
5.3. Wooden beams protection
Given its properties, heat is also transmitted through radiation. In case there are any
wooden beams inside the radiation zone or in the way of the hot air, they MUST be
properly insulated because the continuous exposure in high temperatures can make
them deteriorate faster or even cause self ignition. Use proper insulation materials that
are in accordance with European rules or, in case of high thermal stress you can also
use metal linings.
5.4. General safety instructions
Never leave children alone or without supervision near the fireplace when it is lit.
Teach children how to operate the fireplace correctly and safely.
Never touch the external surfaces of the fireplace or the glass when it is lit. There is a high risk of burns!
Pic. 5.2.1
In general, due to the expansion of the fireplace, the whole casing must have a gap, at
least 0,5 cm, around the fireplace.

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Due to the self closing door, you have to be extra careful when you are filling the fireplace.
It is forbidden to use the fireplace as a waste incinerator.
Don’t use burned or used wood as fuel.
Remove the ash only after it has completely cooled off.
Ash should be placed outdoors or be disposed in a place where there is no risk of ignition.
Immediately inform your specialized local supplier if you find any malfunction.
Don’t use chemicals or liquids as fire starters.
Do not use ANY fuel other than the recommended.
5.5. Flue safety instructions
Prior to installing the fireplace ARTE® the chimney sweep or a
qualified technician should check the condition and operation
of your chimney in accordance with the standards EN13384-1 &
EN13384-2.
By this way, you ensure the best conditions for heating without
issues.
-Basic requirements for proper flue operation
The internal section of the flue must preferably be circular. In a
case of square or rectangular flue, the internal corners should
have a radius of at least 20mm. In case of rectangular flue, the
ratio of the sides should be at maximum 1: 1.5.
The flue must be properly insulated and waterproof and
constructed of materials with thermal resistance and resistance
to combustion products and any deposits.
The flue must have no constrictions, it must have a vertical path and it should not change in direction that exceeds
45oC (Pic. 5.5.1).
In case of an existing flue the construction material should be checked. Materials such as cement with lime,
galvanized steel and rough or porous materials are contraindicated as they create issues in the correct operation of
the fireplace. Also, a proper study for the flue size must be conducted because often old flues have quite large
diameters. This means that the amount of air draft is not proportional to the heat generated by the fireplace and by
extension means that you consume more wood than necessary and will spend more time on maintenance. The
solution proposed in these cases is the connection of an inner tube inside the flue. This tube should extend over the
whole length of the flue and at no point should exceed in diameter the outlet flue of the fireplace. If the existing flue
has the desired diameter a proper cleaning by qualified personnel should be done.
In case of placement of the flue, along outer wall, a careful research must be done in order the thermal loses to be
prevented. However, this solution is not appropriate as the placement of the flue inside the house, heats up more
spaces, as the whole heat of the flue.
The usage of gravitational damper is recommended, for flue ≥ 6m, in order steady and efficient burning to be insured.
-Chimney placement
The placement of the chimney on the roof is a particularly decisive factor in the convection of the fireplace.
An incorrectly fitted chimney may generate reimbursement of exhaust into the heating space due to down flow of the
air.
Follow the instructions below to ensure proper dissipation of smoke (Pic. 5.5.2).
Pic. 5.5.1
Follow the operating instructions supplied with the product to help prevent fire and
protect the environment.

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The ending of the chimney must be at least 50cm above the top of the roof.
If there is more than one chimney on the roof, they must be positioned at least 2m apart.
If there are two adjacent chimneys, their ends must be at least 50cm apart.
If there is a tall building or tree next to the house, then you should place the chimney at a distance greater than 5m
from the obstacle.
It is prohibited to connect several devices to the same chimney. Each chimney should be autonomous (Pic. 5.5.3).
In case of an inclined roof, the height of the chimney is defined depending on the inclination and the distance of the
chimney from the ridge according to the following Table and picture (Table 5.5.1 & Pic. 5.5.4).
INCLINATION
αο
RIDGE –CHIMNEY
DISTANCE
MIN HEIGHT
ABOVE THE RIDGE
Α (m)
H (m)
15ο
< 1,85 m
0,50 m OVER THE RIDGE
> 1,85 m
1,00 m OVER THE ROOF
30ο
< 1,50 m
0,50 m OVER THE RIDGE
> 1,50 m
1,30 m OVER THE ROOF
45ο
< 1,30 m
0,50 m OVER THE RIDGE
> 1,30 m
2,00 m OVER THE ROOF
60ο
< 1,20 m
0,50 m OVER THE RIDGE
> 1,20 m
2,60 m OVER THE ROOF
Pic. 5.5.4
Table 5.5.1
-Chimney cap
The chimney draft depends broadly on the adequacy of the cap.
So, in case the chimney is built, its exhaust diameter should be at least twice the inside diameter of the chimney.
Knowing that it is necessary to protrude from the ridge of the roof, the cap must ensure the proper smoke dissipation in
case of strong wind.
A chimney cap must meet the following requirements:
Internal diameter must be equal to the diameter of the chimney.
Exhaust diameter be at least twice the inside diameter of the chimney.
It should be constructed in such a way as to avoid the entrance of rain, snow and any foreign body in the chimney.
It can be checked, maintained and cleaned easily.
Pic. 5.5.2
Pic. 5.5.3
Industrial style cap with
protective net
Cap with deflector. It leans
according to the wind and it
provides very good smoke
dissipation
Cap with fan. It provides
very good smoke
dissipation even in case
of weak winds

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5.6. Connecting the fireplace with the flue
It is necessary that the flue gas tube is connected to a certified conduit with the same
diameter as the fireplace, by following the dimensions of the adjacent image (Pic. 5.6.1). For
fireplace MENTOR the diameter of the flue is 200mm for fireplaces with width 80cm and 90cm,
and 250mm for fireplaces with width 100cm. The flue must be properly insulated with stone
wool with thickness of 4cm with external aluminum foil. Do not use fiberglass or paper based
insulation. Also, do not use flexible thin walled metallic tubes or asbestos tubes. This tube
should be perfectly sealed and well insulated throughout its length.
To install the flue, you must place it on the fireplace outlet and then seal it using the
appropriate sealant.
5.7. Air intake connection
MENTOR fireplaces, gives you the ability to intake air for the burning from different sources:
Α) The best solution is the air to be intake from the outer environment, opening a wicket
directly on the wall, at the back side of the fireplace, adjusting a flexible aluminum tube on
the Φ100 collar, which is located at the right edge of the fireplace and close to the bottom
(Pic.5.7.1). For the wicket, use a nozzle, protected by a grille and a wire net. The nozzle must
intersect with the combustion chamber through the flexible tub, which must be properly
placed in order not to be covered. Its minimum surface cannot be less than 110 cm2 (Α).
Β) When the direct import of external air is impossible, you can input internal air from your house, by opening a wicket
either at the area where the fireplace is located (Pic. 5.7.2) or from another adjacent room, by installing wickets at the
intermediate walls (Pic. 5.7.3).
These wickets must be free and not able to be covered. Also, their minimum surface must be 300cm2 (Β), for example,
a grille which size is 30x10cm.
In each case, you can select from which side of the fireplace you will import air, by changing the collar’s position with
the galvanized end cap that is located at the left side.
Pic. 5.6.1
Pic. 5.7.1
Pic. 5.7.2
Pic. 5.7.3
The import of the air which comes from garages, kitchen, bathroom or boiler room,
must be avoided.
When the air comes from an external source, there must be always used the
appropriate clamps and Φ100mm collar.

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5.8. Hot air abduction
The space extending around and over the device up to the deflector must
be ventilated continuously. For this reason you must allow cool air from a
lower spot, for example, the bottom and the outlet of the hot air from above
(Pic. 5.8.1).
With that way, it can be achieved:
Higher safety
Increase of the temperature inside the heating room, because of the air
flow around the device (heat conduction).
The hot air extract grille must be placed on top of the trunk approximately
20cm from the ceiling. The grille must always be installed, as its purpose is to
allow, the heat that builds up inside the trunk to be released in the room and
also to relieve the pressure created.
Finally, at the paneling of the fireplace, a visiting slot should be constructed in
order for the installer or the user to have access to the internal parts of the
door and be able to perform maintenance. For the determination of the L and
H dimensions, you should consult the drawing at Chapter 11. Dimensions &
technical specifications.
5.9. Connection with the heating system
The fireplace ARTE® MENTOR can be installed to work individually or in collaboration with any another water heating
device to be used for central or floor heating.
To ensure the safety of the device you must install an overheating safety (Pic. 5.9.1), in order to protect the system
against possible overheating. Also in case of floor heating, it is necessary to use a buffer tank (Pic. 5.9.2) and a thermal
mixing valve (Pic. 5.9.3) to ensure constant temperature of the water in the floor pipes. These parts are not included in
the device.
Pic. 5.9.1
Pic. 5.9.2
Pic. 5.9.3
In any case the installation must be made by a qualified technician and in accordance local law and the regulations
of each country, including all regulations referring to national and European standards.
The installation can be set into operation only after it has been tested by a qualified inspector. Prior to installing the
new fireplace please contact the appropriate local authorities.
Pic. 5.8.1
NEVER use the device if it is not connected to a water heating circuit, which is full of
water!
The installation is made by using 1’’ hoses.

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1.
Output Α(hot water supply)
1” female
2.
Input Α(return of cold water)
1” female
3.
Output Β(hot water supply)
1” female
4.
Input Β(return of cold water)
1” female
5.
Thermowell for temperature sensor
1/2” female
6.
Position for thermal protection valve
sensor 1/2” female
7&8.
Input from the safety valve / output
from the sewage 1/2” male
Pic. 5.9.4
-Connection of supply - return
The ARTE® MENTOR fireplace, allows you to use 2 different pairs for input and output (pair Αand pair Β). These pairs
can be seen in Pic. 5.9.4 with the numeration 1,2 (pair Α) and 3,4 (pair Β). Your device is delivered with the pair A
closed. Select which pair you want to use and seal the other one.
In order to connect the fireplace with the water circuit you must
use 1’’ pipe joints. In order to correctly connect the pipes to the
circuit or seal (if applicable) the remaining joints you must use
hemp or/and thread glue.
An automatic vent valve must be placed for the bleed of the
fireplace’s tank. This can be done in the following ways:
Installation of the automatic vent valve at the output –hot
water supply, at the highest point. (like Pic. 5.9.10, 5.9.11 &
5.9.12).
Or at the point 1 (Pic. 5.9.4) where is closed with a bushing
fitting and a 1/2" pipe plug, in order for you to be able to
install the 1/2" automatic vent valve easily (Pic. 5.9.5).
The valve prior to the automatic vent valve is installed in order the replacement of it to be easier. When the fireplace
operates, this valve must be open. The automatic air vent and the valve are not included.
-Connection of control panel sensor
At the thermowell at point 5 of Pic. 5.9.4, install the temperature sensor of the control panel.
Pic. 5.9.5
Place the panel of the thermostat in a cold room, in order to avoid overheating of
the electric parts.
NEVER use the input of one pair and the output of the other!

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-Overheating protection
In order to ensure the integrity of the heating network
and the device, ARTE® provides you with an option to
place a safety configuration to protect the heating
circuit and the water jacket from overheating (Pic. 5.9.6).
On the back of the water jacket of ARTE® MENTOR
fireplace there are cold water supply joints that are used
by the overheating protection system (points 7 & 8, Pic.
5.9.4). Choose which one of them will be the input and
which will be the output. You must install a thermal
protection valve on the input joint (Pic. 5.9.1) and the
drainage on the output point. Install the thermowell with
the thermal protection valve sensor at point 6 (Pic. 5.9.4).
In case the water temperature in the jacket exceeds
95oC, the overheating safety valve will be activated and
it will insert cold water in the independent overheating
protection system located inside the water jacket, thus
rapidly dropping the water temperature and preventing
the possibility of destroying the device, without mixing
the cold water with the water of the jacket.
For the installation of the protection valve, follow the following instructions:
The arrow indication on the valve must point the flow’s direction of the circuit. (Pic. 5.9.7).
Install it at the horizontal pipe, not at the vertical one (Pic. 5.9.8).
The obturator axis of the valve can be installed downward or sideward, but never upward (Pic. 5.9.9).
Pic. 5.9.7
Pic. 5.9.8
The following graphs, present different connection ways for the fireplace, with the appropriate safety devices.
Pic. 5.9.6
Pic. 5.9.9

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-System with closed expansion tank
when the fireplace is at the same level with the heaters
17. Water mixing valve
(Used only in floor heating installations. It is recommended to be used simultaneously with a boiler tan, for more safety of the circuit.)
13. Water pump
14. Automatic filling valve
15. Closed expansion tank
16. ARTE® MENTOR fireplace
9. Fan coil heater
10. Radiator or heater mat
11. Temperature/pressure
gauge
12. Three way valve for by-
pass
5. Drainage
6. Water distribution box
7. Boiler
8. Hot domestic water
1. Automatic vent valve
2. Thermometer
3. Overheating safety valve
4. Safety relief valve
Pic. 5.9.10

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-System with closed expantion tank
when the fireplace is below the heaters
17. Water mixing valve
(Used only in floor heating installations. It is recommended to be used simultaneously with a boiler tan, for more safety of the circuit.)
13. Water pump
14. Automatic filling valve
15. Closed expansion tank
16. ARTE® MENTOR fireplace
9. Fan coil heater
10. Radiator or heater mat
11. Temperature/pressure
gauge
12. Three way valve for by-
pass
5. Drainage
6. Water distribution box
7. Boiler
8. Hot domestic water
1. Automatic vent valve
2. Thermometer
3. Overheating safety valve
4. Safety relief valve
Pic. 5.9.11

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-System with open expansion tank
13. Water pump
14. Water mixing valve
(Used only in floor heating installations. It is recommended to be used simultaneously with a boiler tan, for more safety of the circuit.)
15. Open expansion tank
9. Fan coil heater
10. Radiator or heater mat
11. Temperature/pressure
gauge
12. Three way valve for by-
pass
5. Drainage
6. Water distribution box
7. Boiler
8. Hot domestic water
1. Automatic vent valve
2. Thermometer
3. Overheating safety valve
4. ARTE® MENTOR fireplace
Pic. 5.9.12
ARTE® MENTOR fireplace is delivered with a stainless steel cooling coil already installed in which
you must install a cold water supply (Pic. 5.9.6) so in case the water inside the water jacket
exceeds 95o C the overheating safety valve will open and rapidly cool the water jacket.

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6. OPERATING INSTRUCTIONS
6.1. Before the first use of the ARTE® MENTOR fireplace
One of our qualified representatives has already provided you with instructions on how to operate the ARTE® MENTOR
fireplace that you just acquired.
The operating instructions below describe in detail the steps to follow so you do not encounter any difficulties during
the operation of the fireplace.
The qualified dealer in your area will be at your disposal to answer any questions. MENTOR fireplace is equipped with
the following control systems:
6.2. About ARTE® MENTOR fireplace
1
Check-maintenance port
14
Automatic combustion air damper
2
Main door with double ceramic crystal
15
Water tank’s drainage plug
3
Attach point for cold handle (left & right)
16
Bottom vermiculite, 1200kg/m3(or cast iron)
4
Log rolling guard
17
Vermiculite panels, 750kg/m3(or cast iron)
5
Positioning wheels (during installation)
18
Ceramic blanket insulation 5-10cm with galvanized
cover
6
Leveling and height adjustment feet
19
Secondary combustion air holes
7
Hydraulic connections
20
Baffle (vermiculite 750kg/m3)
8
Flue
21
Drain valve
9
Automatic fume damper (ADF)
22
Diaphragm of the central water tank pipe
(check port of flue and damper)
10
Adjustment regulator of automatic fume damper
(ADF)
23
Water heating tubes
11
Upper air curtain
24
Inox overheating protection heat exchanger
12
Primary air outlet
25
Flue gas decelerator
13
Intake of combustion air
Table 6.2.1

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6.3. General information
-When the fireplace paint dries
ARTE ® products are painted in spray booth with as more environmentally friendly and ecological colors as possible.
There is although a possibility that the first few times the fireplace is lighted, the paint emits an odor. Let the fire burn
with intense convection until all traces of gas disappear and there is no longer a smell. The gas is not toxic, but the
room should be well ventilated.
-Incineration preparation
Prepare sufficient amount of chopped firewood, kindling and torches or branches. Before using the wood it is
recommended to store them in a warm place for a few days.
-Combustion air intake
Although the fireplace uses external air for combustion, make sure that the room is ventilated adequately when the
fireplace operates with fresh air. When you open the door of the combustion chamber for adding firewood there
should be no pressure difference between outdoor and indoor air in the room, so it is good to keep the door open
for about 1.5cm for 5-6 seconds and then fully open it.
-Power failure
In case of power failure, the water pump/s does not operate so there is overheating danger of the water in the tank.
For this reason, the control panel stops the combustion air supply, in order the fire to go out gradually and the
temperature of the water in the tank to drop, avoiding overheating, although there is overheating protection
(Chapter. 5, Pic. 5.9.6). Therefore, it is suggested the connection of the water pumps and the control panel with an
uninterruptible power supply unit (UPS), in order the flow of the water to be prolonged till the fire in the chamber
drops out. It is suggested a pure sine wave UPS with minimum power of 1000VA to be used, which will ensure
uninterruptible operation of your fireplace for approximately 1 hour.
-Heating during seasonal change or in adverse weather conditions
When there is high humidity or fog, with temperatures ≥15 °C, but also during the transitional period between
seasons, it is recommended to light a test fire before normally lighting the fireplace. This will displace the cold, heavy
air that is inside the flue and create the right conditions for optimum smoke dissipation
-ADF function
The automatic (and adjustable) fume damper [ADF] (Table 6.2.1, Line 10) enables you to adjust the damper to
remain open in any position desired, even with the main door closed, in order to ensure adequate convection,
depending on the season.
e.g. Winter → Towards closed Spring –Autumn → Towards open
To adjust the damper, turn the regulator right to close the damper and left to open it, checking the indicator in order to
calculate its inclination (Pic. 6.3.1).
Position 1
Position 2-3
Position 4-6
CLOSED DAMPER
INTERMEDIATE
POSITION
OPEN DAMPER
Pic. 6.3.1
IN CASE OF POWER FAILURE. DO NOT OPERATE THE DEVICE WITH THE MAIN DOOR OPEN. OTHERWISE,
THE OVERHEATING VALVE WILL DISPOSE OF THE OVERHEATED WATER AT THE DRAINAGE .
The air intake must be positioned so as not to allow being covered.