Biotech PZ65RL User manual

DIE ZUKUNFT DES HEIZENS
PLANNING PORTFOLI0
PZ65RL / PZ100RL / PZ101RL
Only start-up the heating system after having read this assembly instruction manuals thoroughly!
THE FUTURE OF HEATING

Note
If you require customer service, please have the serial number as well as the exact system type ready. You can nd this
information on the identifcation plate, which is located on the pellet daily tank.
This gure is a symbol image and does not necessarly correspond to the system type described in the present
instruction manual.
System type Serial number

Contents
01 General Information 4
02 Safety Notes 5
03 Return ow increase 6
04 Minimum distance from walls 6
05 Notes on planning pellet boilers from 65 to 101 kW 7
06 Technical data 9
07 Dimensions 10
7.1 Pellet boilers PZ65RL 10
7.2 Pellet boilers PZ100RL / PZ101RL 11
08 Chimney Presetting 12
8.1 Effective height 12
09 Pellets storage tank 13
9.1 Location of the heating room 13
9.2 Size of the pellet storage room 14
9.3 Static requirements for the pellets storage room 15
9.4 Sketch / Section pellets storage tank 16
9.5 General indications concerning the lling system 18
9.6 Slanted oor 19
9.7 Existing xtures in the pellet storage 20
10 Extraction systems 21
10.1 General assembly information 21
10.1.1 Earthing of the auger 22
10.1.2 Installation of tubes 22
10.1.3 Earthing of suction tube with copper cord 23
10.1.4 Impact protection mat 23
10.1.5 Filling system 23
10.1.7 There are three (3) different delivery variants for outputting pellets 24
10.2 Auger conveyor output 25
10.2.1 Operating principle 25
10.2.2 Assembly 26
10.3 Output form the sack silo 27
10.3.1 Operating principle 27
10.3.2 Assembly 27
10.3.3 Earthing of the sack silo 27
10.4 Output form the underground tank 28
10.4.1 Operating principle 28
10.4.2 Earthing of the underground tank 28
11 Notes 29

4
01 General Information
• Our customer service or an authorized specialist contractor must carry out assembly, installation, and initial start-up
(setting) of our pellet heating system.
• Recommendation: For long burner running times, in order to reduce the start-stop emissions and to reduce maintenance
costs, the boiler should be fitted with a buffer storage tank, thermosiphon buffer storage tank or combination storage
tank. In practice, buffer capacities between 40 and 75 litres/kW have proven successful. Be sure to take into account the
country-specific requirements regarding buffer storage tanks. The operation of the system is only permissible if it can be
guaranteed that the boiler‘s nominal heat output can be reduced by 50% for a period of at least 2 hours.
• Use only those fuels recommended by us - wood pellets pursuant to EN 14961-2, Class A1+ A2 (Ø 6 mm). Only in this
way can low-emission, economic, and trouble-free operation of your pellet heating system be ensured. Non-compliance
will result in voiding of the guarantee.
• At regular intervals, perform the maintenance and cleaning procedures recommended by us in the manual for your pellet
heating system. When this is done you not only ensure the functional reliability of the system and its safety systems, but
also efcient, low-emission operation of the system. You achieve the best care of your pellet heating system by concluding
a maintenance contract. The indicated cleaning and maintenance intervals must be unconditionally respected. Please
note that, no warranty claim arises for damage that is the result of non-compliance with the maintenance instructions.
• Your heating boiler is adjustable within an output range of 30% to 100% of the rated output. The units should be
operated if at all possible in the middle and upper output range (adjusted to the respective heat requirement),
in order to avoid unnecessary emissions in low load operation. The ideal is the combination with a modulating room and
heating regulator in order to avoid unnecessary cycles and to enable the longest possible running times.
• If technical changes are undertaken independently, we assume no liability for damages that that may result thereof.
• Any procedure undertaken by persons other than those authorized by us, and non-compliance with these general
considerations and the safety notices described below, shall result in immediate voiding of any warranty claim as well
as the guarantee.
• Damaged parts and unit components must be replaced only with original replacement parts.
• It is urgently recommended that this manual be kept within reach in the heating room.
• The pellet heating system described in this manual has been tested in accordance with EN303-5.
• The generally applicable rules of heating technology must be observed for protection against Legionella.
• NOTE: When using pellet heating systems with 2 suction turbines (e.g. 100kW boiler) the daily tank is unequally
emptied (complete emptying cannot be ensured). We have already recommended in the planning a division of the
storage area of between 60 and 40%.
The mandatory maintenance of the system must be done by authorized technicians at least two
a year but no later than when reaching 1500 hours of operation (with an output range of 80-100%).
If NO service is performed, the warranty claim or the warranty is void!
• In the course of maintenance work on the pellet heating system all wear parts are replaced and billed, if necessary.
For service work to be performed, the system must be „cold“. If the system is not shut down in sufcient time and is still
“warm” when the service technician arrives, the resulting idle and waiting time will also be billed.
• Foreign bodies in the fuel can result in damage to the system.
• The regulations pursuant to A-Norm M 7136 (Transport and Storage Logistics) and M 7137 (Pellet Storage Requirement)
must be observed.
• Please note that you must observe the prescribed servicing intervals during the warranty period!
• Properties that require a high degree of security for heat supply (the hotel business, process heating, etc.) are to be
equipped with dual boiler systems. If this requirement is not met, we will deny any claims for consequential damage
based on a faulty heating source. In a biomass heating system, it is essential to take appropriate care ( caretaker,
porter, etc.) so that the stipulated maintenance tasks are carried out regularly!

5
• Datasheet on Wood Pellets pursuant to EN 14961-2, Classes A1 + A2 (Ø 6 mm)
Parameters (Unit) ENplus-A1 ENplus-A2
Length (mm) up to 40 1up to 40 1
Fines (%, mass) ≤ 1 2≤ 1 2
Ash content (%, mass) ≤ 0,7 3≤ 1,0 3
Ash melting temp. (°C) ≥ 1.200 ≥ 1.100
1) Maximum 5% of the pellets may be longer than 40 mm, max. length 45 mm.
2) Particles < 3.15 mm, fines at the last loading site.
3) In a water-free state (wf)
YMM 3x2.5 mm cable 2; electrical connection: 230 V, 50 Hz; fusing 16 A, slow triggering.
Protection with protective multiple earthing with fault-current circuit breaker
(voltage limits pursuant to EN 50160) ATTENTION: ISO Norm 60364 must be observed!
Operational limits: Max. ambient temperature 0-45 °C; max humidity 0-95%
We assume warranty obligations in accordance with the provisions of our warrantee conditions
only when original Biotech replacement parts are used. Biotech grants repair service and
supply of replacement parts for at least 10 years from the date of purchase of the system!
A heating emergency switch (all-phase multidirectional switch off) must be arranged upstream of the
combustion chamber! Switch it off before carrying out the maintenance and/or service work!
The safety notes must absolutely be read before operating the system! Non-compliance with the
safety notes can result in physical injury, life-threatening situations, or damage to the system!
• The pellet heating system may be operated only in technically perfect condition. Malfunctions and damage that
adversely affect or are capable of adversely affecting safety, must be resolved promptly by our technical personnel.
• Assembly must be done only by our customer service or by an authorized technical contractor . The system includes
rotating parts that are driven at relatively high torque (crushing hazard).
• Live voltage parts are located under the enclosure and in the junction boxes. Therefore never remove enclosure parts
or never open the junction boxes!
• During running operation never open the maintenance ports of the boiler; hot ue gas and dust can escape.
• The system must be switched off prior to carrying out any maintenance. Use the ON/OFF switch to switch off
the system. Wait until the system is cooled down (please refer to the boiler temperature on the display). Then switch the
system off using the Heating Emergency OFF Switch. Secure the switch against accidental switch-on of the system.
• Before sweeping the heating tube or the chimney by the chimney cleaner, switch off the system using the ON/
OFFswitch and wait for the burn-out process (about 20 minutes). Explosion hazard due to ue gas congestion.
• Never empty ammable liquid into the combustion chamber.
• Never perform repair work yourself on our systems but rely on our technical personnel. A warning sign „Smoking and
tampering with open ame and re is prohibited“ must be posted (hazard when relling the pellet hopper).
• A certied re extinguisher must be provided in the heating room.
• Ensure an adequate supply of fresh air.
• Secure the heating room against unauthorized access, especially by children.
• The boiler doors and the water-side connections must be inspected once a month for tightness and damage.
• The safety temperature limiter (STL) must be inspected once a year (this should be done during maintenance or
service).
• Safety and monitoring devices must not be removed, bypassed or in any other way made inoperative.
• When cleaning and when removing ashes use a dust mask in order to prevent hazards to health and damages.
• When lling the fuel bunker using pump vehicles, the system must be switched off (waiting time: 20 minutes).
• When setting the non-potable water temperature above 60 ºC ensure an appropriate mixture of cold water (scalding
hazard).
02 Safety Notes

6
03 Return ow increase
04 Minimum distance from walls
• The pellet heating unit must be set up and operated only in heating or installation spaces that have been constructed
in accordance with regulations.
• A suitable vent valve must be installed on the top of the boiler.
• The heating system must be lled with heating water in accordance with VDI 2035 or A-Norm H 5195-1.
• Annual inspection of the heating water pursuant to A-Norm H 5195-1.
• Annual inspection of the safety valves by a specialist.
• Regular inspection of the expansion daily tank by a specialist.
• Regular inspection in accordance with prTRVB H 118 of the discharge device, automatic wood ring systems, loader.
• Fire prevention specications that are compliant with the applicable regulatory provisions must be implemented!
• Please note that even when the system is switched off, different functions are still operating! (The frost protection
device, pumps, and mixers are moved periodically during night times in order to prevent sticking of the bearings). In
order to be certain that absolutely no current is still owing through the system, you must disconnect your
heating unit from the mains!
• The manufacturer assumes no liability for damage arising from an incorrect hook-up of the ow and return – do not
confuse these connections. Establish removable and non-distorted connections. When routing pipelines ensure venting
of the boiler block. For the event of repair, equip the system at the appropriate point with shut-off devices (e.g. ball valve
etc.).
• Before hooking up the boiler to the heat distribution system: Flush the lines and remove residues.
• Caution: Danger of injury by safety valve blow-off! Direct blow-out water to the drainage point.
• Check the boiler for leaks prior to initial start-up. Pressure test the boiler using the pressure equivalent to the safety
valve response pressure. Large pressure will damage the pressure, control, and safety devices. Carryout closure
integrity tests in accordance with local regulations.
• Fill the boiler only when it is in a cold condition The ow temperature must not exceed 40°C
It must be ensured that the return temperature never drops below 55°C. Fitting an automatic return warm water riser
valve is mandatory.
Disregard voids the warranty.
Model PZ65RL PZ100RL
PZ101RL
To the back [mm] 700 700
Left side to wall [mm] 500 500
Right side to wall [mm] 750 750

7
05 Notes on planning pellet boilers from 65 to 101 kW
The following specic equipment properties must be considered when planning/selling and when operating
systems:
• PZ100RL / PZ101RL:
The PZ100RL / PZ101RL system types have two feeding systems from the store to the interim daily tanks. The design
dictates that the emptying of the store will be asymmetrical through both feeding systems. After one storage area is
emptied, the relevant feeding system is disabled automatically. The second feeding system continues to work. After
filling the store, this is to be confirmed via the control panel, so that both feeding systems are once again supplied with
fuel.
• When planning biomass systems, it should be borne in mind that there will be noise from the relevant mechanical
systems and drives such as ignition blowers and vacuum turbines. The relevant soundproofing measures must be taken
for the building. Locating heating areas and installation rooms directly under living and sleeping areas must be avoided.
• It is essential to ensure that the fuel is of the quality we stipulate. Operating faults due to poor fuel, even within the
warranty period, must be billed to the operator if customer service intervention is needed. If, in individual cases, costly
analyses of the ash (slag) or fuel are necessary, the costs will fall on the operator if it is found that these diverge from
the requirements.
Using fuel which does not comply with our requirements will render any claim under warranty void.
• Emptying the ashes: the PZ65RL, PZ100RL and PZ101RL system types each have two external ash trays. Direct
(by detaching the ash daily tanks) or indirect (by removing ash from ash boxes that remain attached to the equipment)
emptying may only be carried out once the system has been shut down. (The systems are operated at reduced pressure.
Opening or emptying the ash daily tanks causes a loss of the reduced pressure and this can exceptionally lead to the
escape of smoke.)
• Pellet transport from the store to the intermediate daily tank:
The period during which the intermediate daily tank is filled automatically can (must) be set by the operator to suit their
needs. Within the set „flex-time“, the daily tank will be filled automatically after the level in the intermediate tank falls
below a set level. Outside this flex-time, the intermediate tank will be filled only as an emergency filling when the level
falls below an absolute minimum. One should bear in mind that this minimum level cannot be defined 100% in advance
because of fuel quality (fine parts affect the pouring angle). If the flex-time in which the pellets are refilled is exceeded,
this can lead to the intermediate tank emptying and hence to subsequent system faults (no ignition, flame goes out, etc.).
We must advise you that these settings are to be chosen according to operator requirements and that faults attributable
to an incorrectly selected flex-time cannot be considered as a claim under warranty.
• Pellet storage:
Please note that in systems rated at 100 kW, up to 400 kg of pellets are consumed per day in full load operation. Sack
silos with correspondingly small volumes of 5 or 6 tonnes, which have to be filled several times a season (or year), are
therefore unsuitable. Unsuitable because the manufacturers stipulate cleaning, say, after every third emptying. This
would therefore be necessary several times a year and is therefore absolutely not recommended. Please note that we
also have not approved the „Mole“ extraction system for these PZ65RL / PZ100RL / PZ101RL systems.
• System dimensioning:
Experience has shown that system congurations are common which need the output to be 90 or 100 kW for a short
time only, say 2 hours a day, at minimum outside temperature (-15 °C). For the remainder of the time, for example, only
one dwelling or ofce building is heated with a required output of, say, 15 kW at -15°C. Unfortunately, no additional buffer
volumes are realized, so that this leads to the most unfavourable operating conditions (start-stop) for a biomass system.
This method of operation leads to increased wear of the ignition equipment and unfavourable emission patterns, etc.
We recommend in such applications that the system be designed as dual (cascade) systems or with commensurably
large buffer store volumes. We must inform you that claims under this heading cannot be recognized and are not a claim
under warranty.

8
• At servicing intervals, the side daily tank cover with inspection hole in the PZ65RL and 2 inspection holes in the
PZ100RL / PZ101RLmust be removed and the pellets are to be moved to the daily tank auger screw extraction point (to
be carried out by the KD engineer)
• System care:
Owing to the necessary tasks such as ash removal, reordering of fuel, including resetting the meter as described, it
is essential that a trained operator is available for the system and that he is also on site for instruction at the time of
commissioning.
• Store room safety:
Chemical processes in wood can lead to the generation of carbon monoxide in the pellet store.
The room therefore needs to be adequately ventilated before entry. The warning notice delivered with the system must
be tted to the entrance to the store and must be observed.
• Heating room ventilation:
Experience has shown (and this is very common) that the vents for providing oxygen to the boiler are obstructed,
covered or are not designed adequately. Note that operating faults can occur through an inadequate oxygen supply (air
feed), and that these will not be covered under warranty.
• If the system fails to ignite for the above reasons and therefore will not start, the combustion chamber is to be cleared
of any residual fuel before a restart (lower service door) so that there cannot be any uncontrolled combustion under the
actual burner system.
• Please advise the future operator that a biomass system requires more looking after.
• Systems in sensitive areas (schools, residential homes for the elderly, hospitals, hotels, process heating supplies, etc.)
are to be designed with redundancy, because even a short failure of the heating can lead to damage. If this instruction
is ignored, Biotech does not accept any liability for damage which has occurred due to lack of heating. It is essential to
enter into a maintenance agreement with the operator. This service level agreement must be accepted by an approved
technical contractor.
Maintenance and Service:
It should be noted that certain individual system components are subject to wear, and that these parts subject to wear
should be replaced at regular intervals. The service life of these parts will vary considerably depending on the way the
system is operated. We therefore recommend that a maintenance contract be concluded with our Customer Service or
an authorised specialist company. As part of these regular maintenance procedures, parts that are subject to wear will
be checked and replaced if necessary.
Please note that faults and service call-outs caused by not replacing parts that are subject to wear in time cannot be
dealt with under warranty or guarantee, and must be charged for accordingly. Visible defects such as expansion cracks
which are incurred by operations do not constitute claims under guarantee, and for this reason also do not have to be
replaced early.
Designation of parts subject to wear
Carbon brushes - ignition device
Heating element – ignition device
Vacuum device (turbine)
Burner grate
Burner upper part
Burner lower part
Output pipes
Turbolators (cleaning springs)
Bearings
Pellet suction hose
Lambda probe

9
06 Technical data
1) excluding base, adjustment range at 65-101 kW 50-80 mm
2) incl. ash box
3) Recommendation 2500 mm
System type PZ65RL PZ100RL PZ101RL
Nominal heat performance (kW) 64,90 99,90 101,00
Degree of efciency at full load (%) 93,60 95,10 95,10
Degree of efciency at part load (%) 94,60 95,60 95,60
Max. adjustable boiler temperature (C°) 85 85 85
Tolerable operating pressure (bar) 3 3 3
CE designation according to low tension guideli CE CE CE
Dimensions
Width of boiler (mm) 1891,50 41891,50 41891,50 4
Depth of boiler (mm) 1232,50 1232,50 1232,50
Total depth (mm) 1375,00 1375,00 1375
Height of boiler (mm) 1833,50 12020,00 12020,00 1
Height of smoke tube connection (mm) 1733,00 11988,00 11988,00 1
Height of ow (mm) 139,50 1139,50 1139,50 1
Height of return ow (mm) 1209,50 11458,00 11458,00 1
Height of ventilation (mm) 1296,50 11545,00 11545,00 1
Diameter of smoke tube connection (mm) 180 200 200
Total weight (kg) 920 1153 1153
Water content (ltr.) 248 273 273
Daily tank – automatically useable (kg) 152 323 323
Ash box - useable (ltr.) 2x42 2x42 2x42
Connections
Flow (inch) 2 2 2
Return ow (inch) 2 2 2
Ventilation for boiler (inch) 1 1 1
Boiler emptying (inch) 1/2 1/2 1/2
Heating water fow resistance
ΔT= 20 K (mbar) 5 5 5
ΔT= 10 K (mbar) 20 20 20
Exhaust gas values
Exhaust gas temperature at full load (C°) 117 110 110
Exhaust gas temperature at part load (C°) 85 73 73
Exhaust gas mass fow at full load (g/s) 41 52 52
Exhaust gas mass fow at part load (g/s) 10,5 13 13
Co2 at full load (Vol%) 14,1 15,1 15,1
Co2 at part load (Vol%) 12,3 13,7 13,7
Necessary delivery pressure (mbar/Pa) 0,05-0,15/5-15 0,05-0,20/5-20 0,05-0,20/5-20
Electric power inpute
Standby (W) 15 15 15
Filling - Turbine (W) 1600 3200 3200
Grate cleaning (W) 65 65 65
Pre-ling (W) 75 75 75
Ignition (W) 1020 1020 1020
At 100% performance (W) 200 200 200
Minimum distance masonry
Backward (mm) 700 700 700
Left to masonry (mm) 500 500 500
Right to masonry (mm) 750 750 750
Placement dimension
At least (mm) 900 900 900
Minimum ceiling height
At least (mm) 2200 2300 92300 9
Volume
In operation (DB) 35 35 35
During suction (DB) 70 70 70
Individual values base on the standard sample testing. These can deviate in practice.

10
7.1 Pellet boilers PZ65RL
07 Dimensions
Pellet boilers
Installation dimensions boiler Installation dimensions vessel All-up weight
Advance 2“ IG Return 2“ IG Venting 1“ IG Emptying 1/2“ IG Aperture/connection pellet suction line DN45 Aperture/connection pellet return air line DN50 Safety temperature limiter Flue pipe connection Ø180 mm
When dismantling console/motor ash extraction Excluding base (50 - 80 mm)

11
7.2 Pellet boilers PZ100RL / PZ101RL
Pellet boilers
Installation dimensions boiler Installation dimensions vessel All-up weight
Advance 2“ IG Return 2“ IG Venting 1“ IG Emptying 1/2“ IG Aperture/connection pellet suction line DN45 Aperture/connection pellet return air line DN50 Safety temperature limiter Flue pipe connection Ø200 mm
When dismantling console/motor ash extraction Excluding base (50 - 80 mm)

12
A moisture resistant (MS) chimney with a (Recommendation material 1.4401, 1.4404) maximum chimney draught of 15
or 20 Pa (0.15 or 0.20 mbar) is required, depending on the system pump. The connection line (ue connector) must be
installed with at least 10° of inclination (30-45° is optimum) with a maximum length of 3.0 metres. The ue connector
must be insulated with at least 25 mm. Execute the chimney connection using at least 45° elbows. Flue gas problems
can occur if 90° elbows are used in a connection. Incorporation of the ue gas connector in the chimney must be done
so that no condensation water can ow into the boiler. The heating boiler and the chimney must be coordinated with each
other (see the chimney recommendation). Please use EN 13384-1 as an aid in calculations.
The chimney must be moisture resistant (MS)!
Installation of a draught stabilizer is required.
Requirements for the ue connector
Connect the ue connector rising on the chimney at least 10°,
ideally 30 to 45°
The ue connector must not be reduced; the diameter of the
ue connector must correspond to that of the ue sockets.
The ue connector must be a pressure-tight design and
provided over its entire length with at least 25 mm thick
thermal insulation.
The draught regulator must be installed at least 600 mm
below the ue connector inlet in the ue system.
ATTENTION: If, due to local conditions, the chimney draught
regulator is deployed directly in the ue duct as opposed to
the position recommended below, an increased dust load
must be expected in the heating room - PLEASE note this at
the time of planning!
8.1 Effective height
The effective height is the chimney length between the ue inlet in the chimney and the chimney mouth. The chimney must
be adapted to the local, regulatory specications! Low-emissions operation in accordance with the Quality seal is possible
only if the system can be operated using the low ue gas temperatures of the lowest heat output (30% of rated load). As a
rule, this requires an acid-resistant chimney.
08 Chimney Presetting
System Type PZ65RL PZ100RL
PZ101RL
Required delivery head - MIN
(mbar / Pa) 0,05 / 5 0,05 / 5
Required delivery head - MAX
(mbar / Pa) 0,15 / 15 0,15 / 15
Chimney diameter (mm) 180 200
Chimney computation accor-
ding to standard EN 13384-1 EN 13384-1

13
09 Pellets storage tank
9.1 Location of the heating room
The pellets are delivered in a silo truck and are blown into the storage room. Usually the silo truck has a pumping hose
with a maximum length of 30 metres. The pellet storage room / the lling couplings must be within 30 metres from the
place of unloading. Please contact your pellet supplier if you require a longer hose.
ATTENTION: Switch off the heating system before the lling process!
If possible, the pellet storage tank should have an outer wall, as the lling connections should be accessible from
outside. The walls must not be humid! If the storage room is anywhere in the interior of the building, the lling and
exhaust air connections can be prolongated so that they reach the outer wall, orthe pumping hose of the pellet supplier
may run through the inside of the building during the lling process.
Also the heating room should have an outer wall to ensure the supply with air required for the combustion. If the heating
room is in the interior of the building, a supply air tube must be provided (in compliance with local re regulations).

14
9.2 Size of the pellet storage room
The size of the storage room depends on the heating load required for the building. However, it should be of a size that
the annual demand of fuel can be stored up to 1.5 times.
Considering the not utilisable volume of the room, the following rules of thumb can be applied for calculating the size:
 Generalrule::
• Per1kWheatingload=0.4-0.9m³storageroom–dependingontheinsulationofthe
  building(includingexpansionspace)
• Utilisablestoragespace=2/3ofstorageroom(includingexpansionspace)
• 1m³pellets=650kg
• Energycontent=approx.5kWh/kg

15
9.3 Static requirements for the pellets storage room
The walls of the storage tanks have to support the weight of the pellets (density 650 kg/m³).
In practice the following wall thicknesses have stood the test*:
• Medium weight vertically perforated brick 11,5 cm with plastering on both sides
• Concrete 10 cm
• Clay brick 12 cm, with plastering on both sides
• Timber pillar wall with 8 cm with frame poles, 50 cm apart, both sides with 20 mm OSB boarding
Important:
Please ensure dust-proofness in the pellet storage room. Aerated concrete (Ytong) is not recommendable. If the outer
walls are made of aerated concrete, cover it with OSB platters. Furthermore ensure a constructive connector to the
ceiling, oor and walls.
*… maximum length of wall is 5.0 metres, height 2.5 meters
Protection from humidity
Pellets are very hygroscopic. If there is contact with water or a humid underground e.g. walls, the pellets swell up to its fourfold
volume, then decay and so become useless or can even lead to damages of the outer and inner wall, if the storage room is
full!
Please note:
• The pellets storage room must stay dry throughout the year.
•If there is a danger of wet walls (e.g. in old buildings) it is recommended to t a rear ventilated facing formwork.
Alternatively there is the possibility of a storage in boxes like bag silos.
• Bag silos and feed units which are outside must be protected from rain, splash water and direct exposure of the
sun. (e.g. car port, wooden sheds,…).

16
9.4 Sketch / Section pellets storage tank

17
Door
For stored quantities ≤ 15,000 kg there are no re protection
requirements regarding doors or hatches in the pellet storage
room. Doors and hatches must open outwards and have to be
completely lined with a gasket strip (for dust tightness). Wooden
boardsmust be tted on the inside of the doors and hatches of
the pellet storage for pressure relief, in order to prevent the
pellets from making pressure against the door or hatch. The
inside door handle has to be removed, the lock must be sealed
from the inside to ensure dust-tighteness..
IMPORTANT: Note country specic regulations!
Impact protection blanket
The impact protection blanket protects the pellets from breaking when impinging against the wall of the storage tank.
Furthermore, it protects the wall from damage. The impact protection blanket consists of an abrasion resistant and
ageing resistant plastic and can be attached to the ceiling and anchored on to the oor (trampoline effect). It is xed
opposite to the lling connection with a distance to the wall of at least 300 mm.
Filling system
Two lling connections are required for lling the pellets storage. When the pellets are delivered, an extract fan is
connected to one connection, and the pellets are blown into the storage room via the other connection. An opening in
the wall with a diameter of 125 – 150 mm is required and the llingconnections are inserted and well xed by means of
adequate material (they must not become loose when the storage room is lled). Whether tting foam glue may be used
or not must be claried with the pellet supplier beforehand.
Please Note!
The lling connections must be rmly connected to the wall.
An earthing via the potential equalisation
is necessary to prevent electrostatic charging during the lling process!

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9.5 General indications concerning the lling system
The following materials must not be used:
• Plastic pipes (danger of electrostatic charging)
• Pipes which may damage the condition of the pellets (folded spiral-seam pipes used in ventilation engineering)
General instructions:
• Only metal pipes or earthed synthetic pipes may be used for the lling system.
• The lling system must be earthed in order to avoid electrostatic charging..
• The inside of the lling pipes or pipelines have to be smooth throughout. If it is necessary to extended the
pipes, use sleeve sockets.
• If pipelines are welded make sure there are no n lines or welding seams on the inside of the pipes.
• The lling system must not end with a bend - after a bend, a straight pipe of at least 500 mm must follow for
quieting.

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9.6 Slanted oor
The storage room has to be designed in a way that it can be almost completely emptied by the pellet extraction system
(e.g. auger feed, suction tube) used.
General advice:
•The inclination of the slanted floor has to be 45°, so that the pellets can slide down automatically.
• The slanted floor should preferably be made of timber with a smooth surface
(e.g. chipboard or coated chipboard; OSB boards have a rather rough surface).
• The slanted floor has to resist the weight of the pellets (density 650 kg/m³).
• L-Beams are an idealsubstructure and make the construction of the slanted floor significantly easier.
• The slanted floor should connect to the walls of the storage room so that no pellets can fall
into the empty space below (they cannot be removed from there).
• When the auger feed is in operation, the openings on the side between the feed channel and the
cover must not be narrowed.
With slanted oor 45°:
- Almost complete emptying
- Same gradient angle
Without slanted oor:
- Increasing gradient anglel

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9.7 Existing xtures in the pellet storage
Existing piping and plumbing which cannot be removed with reasonable effort or involving unreasonable expenses,
have to be covered with a ow- and shockproof casing (e.g. diversion plate)in order to prevent the pellets from bouncing
against, when the storage room is lled. Furthermore it has to be ensured that the pellets cannot be damaged by the
deviation plate (no rectangular cover).
Electric installation in the pellets storage room
There must not be any electric installations (switches, lights or junction boxes) anywhere in the pellets storage!
PLEASE NOTE: With exception of explosion-proof materials!
Power supply
The boiler requires a separate power supply of 230 V 50 Hz. The feeder must be secured with a 16 A expulsion fuse. We
recommend to install a heating emergency switch.
Fire protection
ACCORDING TO COUNTRY SPECIFIC REGULATIONS!