THERMOSTAHL Pellet Compact, Pellet Save Bio Unit, Pellet Compact Bio Unit Instruction Manual

Pellet Compact
Pellet Compact Bio Unit
Pellet Save Bio Unit

INSTRUCTION MANUAL

Version: 1.0

Table of Contents

1

GENERAL INFORMATION

4

2

SCOPE OF DELIVERY (SHIPPING CONDITION)

4

3

TECHNICAL CHARACTERISTICS, INTENDED USE OF THE BOILFER,
TYPES OF FUELS

5

3.1

Boiler description

5

3.2

Types of fuel

5

3.3

Feeding screw

6

3.4

Silo

6

4

FUELS

6

4.1

General

6

4.2

Pellet

6

4.3

Oil and Gas

6

5

TECHNICAL DATA - DIMENSIONS

7

5.1

Technical data

7

5.2

Dimensions

8

6

DESIGN AND INSTALLATION RECOMMENDATIONS

9

6.1

Boiler installation

9

6.2

Hydraulic system installation

12

6.3

Installation safety

15

6.4

Chimney system

18

6.5

Electrical wiring system

19

7

OPERATION AND MAINTENANCE

19

8

TROUBLESHOOTING

20

THERMOSTAHL would like to thank and congratulate you on your purchasing
this boiler device and ensure that you have made a good choice. BIODROP
boiler is a fail-proof product made of the highest quality materials by the large,
known and reliable production factory. THERMOSTAHL brand guarantees
satisfaction for the customer.

Please read this Operation and Maintenance Documentation (OMD) and get
familiarized with the terms and conditions of the guarantee before installing
and operating the boiler.

1. GENERAL INFORMATION

The Operation and Maintenance Documentation constitutes an integral part of the
boiler and should be delivered to the user with the device.

Installation should be carried out in accordance with the recommendations contained
in this documentation as well as applicable standards and best construction
practices.

Operational use of the boiler based on this documentation shall guarantee safe and
failure-free operation and shall constitute the basis for possible guarantee claims.

The Manufacturer (Thermostahl) shall reserve the right to modify production
engineering, technical data, dimensions, appearance and boiler equipment without
prior notice.

THERMOSTAHL shall not be responsible for damages resulting from improper
installation of the device and for failure to comply with the terms and conditions set
forth in the Operation and Maintenance Documentation.

2. SCOPE OF DELIVERY (SHIPPING CONDITION)

Pellet Compact Bio-Unit boiler shall be delivered as follows:

 The complete boiler body with the boiler doors,

 Packaging with the casing, thermal insulation with harnesses and turnbuckles

for its clamping,

 Silo,

 Control panel (charged separately),

 Cleaning tools,

 Technical manual.

Additionally, the pellet burner shall be delivered as follow:

 Pellet burner

 Feeding screw

 Flange for the connection with the boiler

 Cleaning tool for the burner

 Connection hose,

 Technical manual of the burner

3. TECHNICAL CHARACTERISTICS, INTENDED USE OF THE BOILER, TYPES
OF FUELS

3.1. Boiler description

The boiler of Pellet Compact Bio-Unit type is a low-temperature, steel water
boiler. It is a complete pellet system with boiler, pellet burner, feeding screw and
silo for heating. All the parts work perfectly with the higher efficiency and provide
constant operation with reliability.

The ignition and the operation are completely automatic. Because pellet contains
ash amount (<1%), it is required the often cleaning of the boiler to avoid
problems during the operation of the system.

3.2. Pellet burner

The pellet burners are developed and manufactured by Megatherm. Thanks to the
construction with a forward burning flame, this burner will give the most effective
combustion and it is easy to fit it to the boiler. There are 3 models available and
suitable with the boilers. The models are; Nani 35, MPB 50 and MPB 80. The heat
output of the burners are 10-35kW, 25-50kW and40-80kW and it is adjusted
depended on the heat losses and the boilers it is installed.

Boiler type

PLC 23

PLC 35

PLC 47

PLC 58

PLC 69

PLC 81

PLC 93

PLC 116

Burner type

MPB 35

MPB 50

MPB 80

MPB 35 and MPB 50

3.3. Feeding screw

The outer feeding screw provides the necessary fuel supply to the burner. The
one end inserted into the fuel tank (silo), while in the other there is the motor of
the screw, and the nozzle for the drop of pellet into the burner via a plastic
connection hose. The hose is made of a fusible plastic that melts for safety in
temperature of 100oC.

The hose must be sufficiently taut and have sufficient slope to permit free flow of
pellets and not block the fuel. The connection must be tight and clamped via the
provided clamps, for protection against return exhaust gases.

3.4. Silo

The silo is used to the store the pellet. The silo is placed above the boiler. It has
inner inclined sides to permit the free fall of fuel supply to the feeding screw
without leaving residues. It has a slide cover, window for fuel level inspection and
flange with neck stabilization of the screw. When filling the tank avoid entering
into the silo foreign objects such as stones, pieces of wood, plastic or metal
materials, etc., which can cause damage to the feeding screw.

4. FUELS

4.1. General

Pellet Compact Bio-Unit boilers are designed for pellet, with high efficiency,
reliability and easy maintenance. Additionally, it is a boiler that can work perfectly
with heating oil or gas burner as well. In case of burner changed it is may needed
an extra flange for the connection with the boiler.

4.2. Pellet

The pellet burner can operate only with high quality wood pellet. Any other fuel
can cause problem to the burner.

The pellet is 100% natural product and renewable energy source. It is
constructed by forest residues, woods, etc. The wood pellet is produced
exclusively from wood, without other additives and chemicals.

4.3. Oil and gas

The boiler can be operated with oil or gas with very good performance, with a
simple change of the burner.

Fuel switching may require special flange to fit the new burner to the boiler door.
The company is not responsible for the commission of the flange.

The burner is not part of the boiler, and is not covered by the regulations of this
manual neither the warranty of the boiler. If mounted oil burner should be
installed in accordance with applicable regulations and be accompanied for the
proper and safe use.

Pellet Specifications

Diameter

6-8 mm

Length

6-30,5 mm

Density

650-700 kg/m3

Ash

<0,7%

Heating value

>4,7 kWh/kg

Humidity

<10%

5. TECHNICAL DATA – DIMENSIONS

5.1. Technical Data

Type

PLC 23

PLC 35

PLC 47

PLC 58

Heating power

kcal/h

20.000

30.000

40.000

50.000

KW

23

35

47

58

Efficiency

%

92

92

92

92

Operating pressure

bar 2 2 2 2

Max operating pressure

bar 3 3 3 3

Operating temperature
(max)

o

C

95

95

95

95

Inlet temperature(min)

o

C

60

60

60

60

Exhaust gases temperature
(max)

o

C

180

180

180

180

Chimney convection

Pa

-12

-12

-12

-12

Silo volume

lit

170

170

200

200

Water content

lit

80

100

120

140

Combustion chamber
volume

lit

72

84

96

108

Weight of compact unit
(empty)

kg

270

290

310

330

Type

PLC 69

PLC 81

PLC 93

PLC 116

Heating power

kcal/h

60.000

70.000

80.000

100.000

KW

69

81

93

116

Efficiency

%

92

92

92

92

Operating pressure

bar 2 2 2 2

Max operating pressure

bar 3 3 3 3

Operating temperature
(max)

o

C

95

95

95

95

Inlet temperature(min)

o

C

60

60

60

60

Exhaust gases
temperature (max)

o

C

180

180

180

180

Chimney convection

Pa

-12

-12

-14

-14

Silo volume

lit

250

250

300

300

Water content

lit

160

190

220

250

Combustion chamber
volume

lit

130

156

182

208

Weight of compact unit
(empty)

kg

395

420

445

470

5.2. Dimensions

Type

PLC 23

PLC 35

PLC 47

PLC 58

A

mm

660

660

660

660

B

mm

835

835

835

835

B1

mm

1740

1740

1740

1740

C

mm

1200

1200

1400

1400

D

mm

585

585

585

585

E

mm

345

345

345

345

F

mm

125

125

125

125

G

mm

860

860

860

860

H

mm

575

575

575

575

I

mm

550

650

750

850

K

mm

500

600

700

800

Φ1

mm

150

150

150

150

Φ2

mm

180

180

180

180

Τ1-Τ2

in

1¼’’

1¼’’

1¼’’

1¼’’

Τ3

in

½’’

½’’

½’’

½’’

Type

PLC 69

PLC 81

PLC 93

PLC 116

A

mm

773

773

773

773

B

mm

905

905

905

905

B1

mm

1810

1810

1810

1810

C

mm

1400

1500

1600

1700

D

mm

698

698

698

698

E

mm

345

345

345

345

F

mm

135

135

135

135

G

mm

930

930

930

930

H

mm

610

610

610

610

I

mm

800

900

1000

1100

K

mm

750

850

950

1000

Φ1

mm

180

180

180

180

Φ2

mm

180

180

180

180

Τ1-Τ2

in

1½’’

1½’’

1½’’

2’’

Τ3

in

½’’

½’’

½’’

½’’

6. DESIGN AND INSTALLATION RECOMMENDATIONS

6.1. Boiler installation

Jackets assembling:

Jacket (covers) assembling on the boiler body is done easy and fast respecting the
following instructions.
Fitting order is the following:
a. Fit first the insulation and the side covers.
b. Fit the upper cover.
c. Screw in the upper front of the side covers the control panel and in the
back the cover for the smoke box.
d. Fit the insulation and cover for the front door by screwing first the
connecting screws between the door and jacket.

The boilers can be installed in their own room, in the basement, ground floor or the
upper floors of the production buildings from category C, D and E of fire danger
warehouses of incombustible materials and civil buildings, according the valid
legislation.
ATENTION! It is prohibited to install a boiler in a room with a common wall with
rooms with people that cannot evacuate themselves (hospitals, shops, kindergartens,
daycare centers, etc) or under the evacuation ways of those.
BOILER LOCATION must be separate of the joined rooms by walls, incombustible
doors and without window holes.
Space dimensions:
We advise that the boiler installation must be made in such a way that there is
enough space for easy cleaning and maintenance.
Boiler must be installed on horizontal plan and if possible easy to be accessed on all
sides.
Burner must be installed on the front door and fastened with the screws on its special
flange.
The auger must make an angle of 45 degrees with the floor.
The distance between the front wall and the boiler: at least 1,5 m.
The distance between the front wall and the boiler: the adequate distance that allows
an easy access for checking and maintenance.

The distance between the side wall and the boiler: at least 0,6 m.
The high of the boiler room: – at least 2,5 m.
According PT C 9-2003 the access in the boiler room of foreign people except the
boiler operator is prohibited.
The ISCIR-INSPECT IT inspectors and the technical surveillance personal may enter
the boiler room, any time on the basis of control written approval.
ATENTION! It is forbidden to give another destination to the boiler room except the
one established by project.
The access and maintenance spaces must be always free and the access doors.
In the boiler rooms with nominal power greater than 300 kW there must be a
telephone or other means of fast communication with the exterior that may avoid
unjustified departures of the operators from the boiler room.
In the boiler room there will be placed in visible places operating instructions for the
specific boilers in the room. There will be also posted internal instructions and
obligations of the operating personnel and the way of operating the boiler.

Observation:
The boiler room must be:
a. clean;
b. without flammable objects;
c. with drainage system;
d. supplied with enough fresh air;
e. separated by the liquid fuel tanks who will be installed in well ventilated,

separatespacesoutsidetheboilerroom.Iftheyareplacedintheboilerroomthey’ll

be separated by a wall, in conformity with the valid safety regulations;
f. a fire extinguisher with dry powder, and next to the door a portable
extinguisher;
g. with a safe chimney with an adequate section;
h. with a smoke detector installed on the ceiling in case the building is
designed with a fire alarm system;
i. the door must be metallic without grids or windows and to open in the
outside;

It is forbidden to install the boiler in spaces with lots of dust, dangerous gases, and in
wet areas such as bathrooms with great humidity.

Type

Dimensions [mm]

A1

A2

A3

A4

H

H1

L1

L2

PLC 20

1100

>700

1200

1500-3000

1700

>2300

>1000

>600

PLC 30

1100

>700

1200

1500-3000

1700

>2300

>1000

>600

PLC 40

1100

>700

1200

1500-3000

1700

>2300

>1000

>600

PLC 50

1100

>700

1200

1500-3000

1700

>2300

>1200

>600

PLC 60

1800

>780

1200

1500-3000

1700

>2300

>1200

>600

PLC 70

1800

>780

1200

1500-3000

1700

>2300

>1200

>600

PLC 80

1800

>780

1200

1500-3000

1700

>2300

>1200

>600

PLC 100

1800

>780

1200

1500-3000

1700

>2300

>1200

>600

6.2. Hydraulic system installation

Connection with indirect heated storage

Installation drawing of a Pellet Compact Bio-Unit with water storage tank for domestic hot water

1.

Boiler

2.

Closed type expansion tank

3.

3 bar safety set (safety valve, automatic air vent, manometer)

4+5.

Circulator and 3 way safety valve

6.

Y-type strainer

7.

Filter

8.

Automatic feeling with manometer

9.

Filter

10.

Indirect heated storage with one serpentine

11.

Safety valve

12.

3-way diversion valve

13.

Radiators – Heating installation

RS

Ball valve

CS

Check valve

RG

Drain tap

TC

Room thermostat

MC

Control panel

SB

Boiler sensor

Connection with buffer tank

Installation drawing of a Pellet Compact Bio-Unit with buffer tank

1.

Boiler

2.

Closed type expansion tank

3.

3 bar safety set (safety valve, automatic air vent, manometer)

4+5.

Circulator and 3 way safety valve

6.

Y-type strainer

7.

Filter

8.

Automatic feeling with manometer

9.

Filter

10.

Buffer tank

11.

TP safety valve

12.

Heating and DHW Circulator

13.

3-way diversion valve

14.

Indirect heated storage with one serpentine

15.

Safety valve

16.

Radiators – Heating installation

RS

Ball valve

CS

Check valve

RG

Drain tap

TC

Room thermostat

MC

Control panel

SB

Boiler sensor

Connection with second boiler

Installation drawing of a Pellet Compact Bio-Unit with second boiler

1.

Boiler

2+3.

Oil boiler and oil burner

4.

Closed type expansion tank

5.

3 bar safety set (safety valve, automatic air vent, manometer)

6+7.

Circulator and 3 way safety valve

8.

Y-type strainer

9.

3 way mixing valve

10.

Buffer tank

11.

TP safety valve

12.

Indirect heated storage with one serpentine

13.

Filter

14.

Filter

15.

Automatic feeling with manometer

16.

Heating and DHW Circulator

17.

3-way diversion valve

18.

Boiler safety valve

19.

Radiators – Heating installation

RS

Ball valve

CS

Check valve

RG

Drain tap

TC

Room thermostat

MC

Control panel

SB

Boiler sensor

6.3. Installation safety

3 bar safety kit

It consists of a collector, manometer, safety valve and automatic air vent. It is fixed to
the input of hot water. For safety reasons, if not installed any of the following
protective systems must be installed and the second valve.

Regularly check the correct operation of safety valves. In case of wear or damage,
replace them immediately with new ones.

3 bar safety kit.

By-pass system with load units

Boiler has to operate for a temperature difference 10 to 15oC and to insecure that the
temperature of the return water is over 50oC. This insures the smooth operation of
the boiler and generally the right operation, the constant performance and the long
lifetime.

To insure that the temperature difference will be between 10 and 15oC the installation
needs a recirculation pump and a 3-way thermostatic valve. This system insures the
right temperature of return water and also the right temperature of water at the
radiators.

The ESBE series LTC100 is a load unit designed to protect the boiler from return
temperatures that are too low. Maintaining a high and stable return temperature
enables a higher level of boiler efficiency, reduced tarring and increased life span of
the boiler. The integrated pump offers boiler protection and optimal tank loading.

The LTC100 is used in heating applications where solid fuel boilers are used to feed
storage tanks.

The load unit consists of an integrated pump and thermic valve, designed to make
both assembly and handling easy. The load unit is protected by an insulation shell
and is fitted with easily readable thermometers.

The valve regulates on two ports, which makes it easy to install and does not require
any balancing valve in the bypass pipe.

The LTC100 has an integrated auto-circulation function which makes the unit
operational even during power failure or pump failure. The circulation function is
blocked at delivery, but can easily be activated if required.

The valve contains a thermostat which begins to open connection A at an outgoing
mixed water temperature in connection ABof50°C,55°C,60°C,65°C,70°Cor75°C.
Connection B is fully closed when the temperature in connection A exceeds the
nominalopeningtemperaturewith10°C.

ESBE LTC 100, load unit.

Overheating protection system

This thermostatic recooling two-way valve is designed to protect central-heating heat
sources against overheating. The fill and drain valves in its brass body are controlled
by a thermostatic element. When the limit temperature is reached, the drain valve
opens, enabling the overheated water escape from the heat source into the sewer
system. At the same time, the filling valve opens to let cold water in from the mains.
As soon as the water temperature drops below the limit, both the valves close.

If the pressure in the mains could be above 6 bar, it is necessary to install a pressure
reducer at the inlet of cooling water. It should be installed as well if the pressure in
the heating system is too high after recooling. In such cases the pressure of the
reducing valve should be set approximately to a double value of the pressure
required in the heating system, not less than 2 bar.

Warning: This valve is NO substitution for a safety valve.

Technical Data

Opening temperature (limit)

97±2oC

Max operation temperature

120oC

Max boiler pressure

4 bar

Max network pressure

6 bar

Nominal flow rate at pressure
difference of 1 bar

1.8m3/h at 110oC
temperature

Temperature and pressure relief valve

The T&P valve has a temperature sensor and provides double safety against
temperature (90oC) and pressure (3 bar). The output of the valve should be
connected with the drain for the disposal of the overheated water. The T&P valve
should be connected nearby to the boiler and necessary at the outlet. It provides
safety in case of closed type expansion tank installation but it is not replace the
overheating safety system.

Technical data:

Temperature (limit)

90οC

Pressure (limit)

3 bar

Connection

½”

Discharge rating:

10 kW

Dimensions

A B C D E

F

½”

Ø15

40

102

88

39

Thermal protection of the boiler

The boiler should be operated within the supply and return water temperature

differences in the range of 10 – 15°C.

Because of the lifecycle of the boiler, it should be operated with the return
watertemperaturenotlowerthan60°C.

In practice, it is difficult to meet this condition because the average

atmospheric conditions during the entire heating season “require” lower

settings.

In order to ensure the required return water temperature the following
solutions are suggested:

Higher settings on the boiler (possible only with low external temperatures).

Recommended

use of a mixing system based on the application of a three-way mixing valve

with a boiler circulator (the solution ensuring the proper temperature of both
the return water and the central heating system)

Boiler water requirements:

water for filling up boilers and heating installations should comply with the

requirements of the PN-93/C-04607 standard,

the boiler water should have the following parameters:

- pH value > 8.5

- total hardness < 20of

- free oxygen content < 0,05 mg/l

- chlorides content < 60 mg/l.

the used water treatment technology for filling up the heating installation

should comply with the requirements referred to above,

In the event of failing to comply with the above-mentioned requirements,

THERMOSTAHL may withdraw the guarantee for the installed boiler (boilers).

6.4. Chimney system

It should be installed as an acid-proof, double-wall, insulated chimney, or in

the case of chimneys made of brick, comply with the requirements of the
PN89/B-10425 standard; the technical parameters of the chimney should
ensure its protection against the effects of the condensate resulting from
cooling of the flue gas. Use of acid-proof chimney inserts (tin, stoneware, etc.)
is recommended.

The section of the chimney can be calculated following the formula provided

below:

D = 20(3+P)

1/2

[m2]; where: D-diameter in mm, P-boiler power rating in kW.

The chimney diameter may not be less than the diameter of the flue.

Connecting several boilers to one common chimney flue is not recommended.

The connection of the boiler to the chimney should be thermally insulated and

run the shortest possible way with the least possible number of pipe elbows,
with the appropriate height of the flue towards the chimney.

The chimney should be freely open towards the top and built at least 1 m

above the roof,

The diameter of the flue gas duct should be selected (calculated) in

accordance with the recommendations of the manufacturers of the chimney
inserts, however it should not be less than the diameter of the boiler flue.

Installation of an inspection door for removing combustion residues should be

envisaged,

The entire length of the chimney should be maintained clean,

Before connection the boiler to the chimney the user should obtain a positive

opinionofthechimneycleaners’specialist.

A graph for selecting the chimney diameter in relation to the boiler power rating and the chimney height, including
the provided values of the chimney draught.

6.5. Electrical wiring

General information

The electrical installation must be done by a qualified electrician in accordance
with applicable regulations EN 60529 and EN 60335-1 and protection IP 40 and IP

44. The electrical installation of the boiler consists of an electrical panel, mounted

on the wall and distributes the necessary electrical power. It should be tight, and
wiring must be in metal or plastic channels.

The main power cable should pass through the electrical panel and secured safely
max 16A. The lighting system of the boiler must be on a separate circuit.

The manufacturer assumes no responsibility for damage caused by installation or
wear materials, devices, etc. that may have been caused by inadequate
grounding of system.

Connection of control panel

The control panel of the boiler operates with power 230V/50 Hz AC. Overvoltage
or frequent fluctuations may damage the operation panel and devices.

All devices connected to the panel and checked and adjusted by (ventilator,
motor, circulator). The circuit of the electric board is protected by circuit breaker
230 V / 2.5 A thermal fuse which activated at 95oC.

Pellet burner connection

The boiler has the ability to connect with any type pellet burner as long as the
conditions met with the manufacturer of the burner (depth and diameter
combustion chamber of the boiler). The connection instructions of the burner
accompany each burner.

Mention that each burner must always be accompanied by the control panel and
the sensor. The sensors connected to electronic panel, so placed the sensor into
the sensor well without oil. The sensor well is located in the front upper part of
the boiler.

7. GENERAL MAINTENANCE INSTRUCTIONS

According the regulations DIN 4575 and 4756 the boiler needs periodic cleaning (if
necessary even daily) by qualified personnel to ensure an economic and ecologic
operation.
The boiler needs a maintenance cleaning at the end of winter season. A special care
needs to be taking with the smoke tubes cleaning, for avoiding deposits of lime and
salt that may destroy them. The burnt residues must be removed.
Ifacorrectmaintenanceisn’tdoneproperlythenproblemswouldarisesuchas:

Maintenance operations:

- Dismantling and cleaning of the burner.

- Opening of the door.

- Dismantling of the turbulators from the smoke tubes and cleaning them with

a special brush.

- Cleaning of the fire chamber with a special poker.

- Cleaning the ash.

- Checking the ceramic braids from the door and replacing them if damaged.

- Checking the refractory material of the door.

- Safety valves must be checked and replaced if damaged.

- Checking of water supply.

- Checking of the filter of the water supply.

- Checking and cleaning the glass from the eye slit.

PELLET COMPACT BIO-UNIT boiler can be equipped at request with different type
of flanges, for operations with different type of burners:

- Flange for pellet burner

- Flange for diesel burner (request)

- Flange for gas burner (request)

Back fire Protection Systems.
The feeding hose is made by a silicone material and on the intake pipe there is a
safety thermostat that will cut the power and stop the pellet feeding and burning.
When it is activated then after the thermostat cools down, you have to reset it by
pressing the reset button so that the burner may start working again. But first you
have to remove what caused the alarm.

8. TROUBLESHOOTING

Inthefollowingtableyou’llfindtheactionsyoumusttakewhenaproblemshould

arise. In the left column you may find the problem and in the right the solution for it.

Lack of electric

power

(the water in the

boiler is boiling)

In case the boiler produces also hot sanitary water

open a tap of hot water to reduce the temperature in
the boiler.

Lack of electric

power at the control

panel.

Check if the connections between the control panel

and the power source are correct and in good condition.

Check if the safety thermostat for backfire did not
switched off. You have to shut off the power and to reset the
thermostat manually, (danger for electric shock).

Thepumpdoesn’t

start

Check if the connections between the pump, the

sensor and the control panel are correct and in good
condition.

Check if the pump is not jammed; in this case switch

off the power, open the pump lid and unlock manually with a
screwdriver.

Check if the temperature probe in the boiler is well

positioned and if it is not rusted or deteriorated.

The warm water

doesn’treachthe

radiators

Check if the valves from the radiators are open and if

there is no air trapped in the installation (vent it off).

Check the hydraulic connections to be correct.

Check if the pump is working.

The boiler has

smoke leaks

Check if the chimney doesn’t have excessive soot

layers.

Check the chimney tightness.

Check if the chimney is in good condition.

Checkthepelletsquality(theyshouldn’tbewet).

Excessive layers of

soot are on the fire

chamber walls

Checkthepelletsquality(theyshouldn’t be wet) they

may jam the feeding system.

Do not use pellets made from different products such
as furniture industry made with glue or other kind of
adhesives, because they produce a lot of soot and will
obturated very quickly the smoke tubes increasing the
cleaning frequency from once a week to 1-2 times a day.

Clean the burner (the mobile tray) because ash has
accumulated inside of it and the air is allowed to enter the
burner so there will be no fire.

Fire is weak and the

pellets are below the

air holes in the

burner

Increase the feeding time from the timer until the
pellets level in the burner reaches the superior level in the
burner tray.

Watch it for a time so that the level will not be too high
and unburnt pellets may result.

The eye slit glass

gets excessively

dirty

Check if there is not too much soot on the smoke tubes,

which can cause a smoke stop in the fire chamber, stop
the pellets feeding and clean the turbulators and the
smoke tubes with the cleaning brush.

Hot sanitary water

with insufficient

temperature

Increase the temperature of the pump thermostat and
then check at the tap.

Check that the flame to be always lively.

Eventual problems of hydraulic installation (check the
pump that pumps hot water into the sanitary water­accumulating tank).

Smoke inside the

silo

There is a problem with the chimney:

The turbulators were not cleaned and the smoke
tubes diameter is obturated. If the turbulators are damaged
they need replacement;

The elbows and the T pipes of the chimney need to be
cleaned.