Froling SP Dual User manual

Operating Instructions
Dual fuel boiler SP Dual (Touch)
Translation of the original German operating instructions for the operator
Read and follow the instructions and safety information!
Technical changes, typographical errors and omissions reserved!
B0900113_en | Edition 18/09/2013
Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

Contents
1 General 4
2 Safety 5
2.1 Hazard levels of warnings 5
2.2 Pictograms used 6
2.3 General safety information 7
2.4 Permitted uses 8
2.4.1 The Clean Air Act 1993 and Smoke Control Areas 8
2.4.2 Permitted fuels 9
Firewood 9
Wood pellets 9
2.4.3 Fuels permitted under certain conditions 9
Wood briquettes 9
2.4.4 Non-permitted fuels 10
2.5 Qualification of operating staff 10
2.6 Protective equipment for operating staff 10
2.7 Design information 11
2.7.1 Installation and approval of the heating system 11
2.7.2 General information for installation room (boiler room) 11
2.7.3 Requirements for central heating water 12
2.7.4 Notes for using pressure maintenance systems 12
2.7.5 Return lift 13
2.7.6 Combination with storage tank 13
2.7.7 Chimney connection/chimney system 13
2.8 Safety Devices 14
2.9 Residual risks 15
2.10 Emergency procedure 17
2.10.1 Overheating of the system 17
2.10.2 Smell of flue gas 17
2.10.3 Fire in the system 17
3 Operating the system 18
3.1 Assembly and initial startup 18
3.2 Filling the pellet store 19
3.2.1 General advice for working in the store 19
3.3 Heating up the boiler 20
3.3.1 Switching on the power supply 20
3.3.2 Before heating up the boiler 20
Reloading intervals when operating with storage tank 20
Determining the right amount of fuel 21
Fuel table 22
Fill level in boiler 22
Reloading intervals when operating without storage tank or if the storage tank is too small 22
3.3.3 Heating the boiler with firewood 23
3.3.4 Reloading firewood 25
3.3.5 Boiler in combi mode 26
Switching on the boiler 26
How combi mode works 26
Contents
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Switching off the boiler 26
3.3.6 Controlling the boiler 27
3.3.7 Switching off the power supply 27
4 Boiler Servicing 28
4.1 General information on servicing 28
4.2 Inspection and cleaning 29
4.2.1 Prior to heating up 29
Always move the WOS lever 29
4.2.2 Inspection 30
Checking the system pressure 30
Checking the thermal discharge safety device 30
Checking the safety valve 30
Checking the quick vent valve 30
4.2.3 Cleaning 31
Emptying ash 31
Cleaning the grating 31
Emptying the ash drawer of the pellet unit 32
4.2.4 Annual inspection 33
Cleaning the carbonisation gas duct 33
Checking the primary air openings 33
Cleaning the heat exchanger pipes 34
Checking the seal on the doors 35
Cleaning the flue gas temperature sensor 36
Clean the flue gas pipe 37
Checking the draught controller flap 37
Cleaning the induced draught fan 37
4.3 Emissions measurement by chimney sweep or regulatory body 38
4.3.1 Measuring at rated load in pellet mode 38
4.3.2 Measuring at rated load in firewood mode 38
4.3.3 Measuring at partial load in firewood mode (if required) 38
4.4 Maintenance agreement / Customer service 39
4.5 Replacement parts 39
4.6 Disposal information 39
4.6.1 Disposal of the ash 39
4.6.2 Disposal of system components 39
5 Troubleshooting 40
5.1 General fault with power supply 40
5.1.1 Behaviour of system after a power failure 40
5.2 Excessive temperature 40
5.3 Faults with fault message 41
5.3.1 Procedure for fault messages 41
5.3.2 Acknowledging a fault message 41
6 Appendix 42
6.1 Addresses 42
6.1.1 Address of manufacturer 42
6.1.2 Address of the installer 42
Contents
Operating Instructions SP Dual (Touch) | B0900113_en 3

1 General
Thank you for choosing a quality product from Fröling. The product features a state-of-
the-art design and conforms to all currently applicable standards and testing guide‐
lines.
Please read and observe the documentation provided and always keep it close to the
system for reference. Observing the requirements and safety information in the docu‐
mentation makes a significant contribution to safe, appropriate, environmentally friend‐
ly and economical operation of the system.
The constant further development of our products means that there may be minor dif‐
ferences from the pictures and content. If you discover any errors, please let us know:
[email protected].
Subject to technical change.
Guarantee conditions
Our sale and delivery conditions generally apply. These conditions have been made
available to customers, and customers have been made aware of them at the time of
order completion.
You can also find the guarantee conditions on the enclosed guarantee certificate.
1General
4 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

2 Safety
2.1 Hazard levels of warnings
This documentation uses warnings with the following hazard levels to indicate direct
hazards and important safety instructions:
DANGER
The dangerous situation is imminent and if measures are not observed it will lead
to serious injury or death. You must follow the instructions!
WARNING
The dangerous situation may occur and if measures are not observed it will lead
to serious injury or death. Work with extreme care.
CAUTION
The dangerous situation may occur and if measures are not observed it will lead
to minor injuries or damage to property.
Safety 2
Hazard levels of warnings
Operating Instructions SP Dual (Touch) | B0900113_en 5

2.2 Pictograms used
The following symbols are used in the documentation and/or on the boiler to show
what is required and forbidden and to give warnings.
In accordance with the Machinery Directive, signs fitted directly within the danger area
of the boiler indicate immediate hazards or safety procedures. These stickers must not
be removed or covered.
Refer to the operating instruc‐
tions
Wear safety shoes
Wear protective gloves Turn off the main switch
Keep the doors closed Wear a dust mask
Work under the supervision of a
second person
Lock
Unauthorised access prohibited No fire, open flames or smoking
Warning - hot surface Warning - hazardous electrical
voltage
Warning - hazardous or irritant
materials
Warning - automatic boiler start‐
up
Warning of injury to fingers or
hands, automatic fan
Warning of injury to fingers or
hands, automatic screw
Warning of injury to fingers or
hands, gear/chain drive
Warning of injury to fingers or
hands, cutting edge
Hand injury warning Warning of injury from being
pulled into rotating shafts
Increased CO concentration
warning
Slipping hazard warning
2Safety
Pictograms used
6 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

2.3 General safety information
DANGER
If the device is used incorrectly:
Incorrect use of the system can cause severe injury and damage.
When operating the system:
❒ Observe the instructions and information in the manuals
❒ Observe the details on procedures for operation, maintenance and cleaning,
as well as troubleshooting in the individual manuals.
❒ Any work above and beyond this should be carried out by authorised heating
engineers or by Froling customer services.
WARNING
External influences:
Negative external influences, such as insufficient combustion air or non-standard
fuel, can cause serious faults in combustion (e.g. spontaneous combustion of car‐
bonisation gases or flash fires) which can in turn cause serious accidents!
When operating the boiler, please note the following:
❒ Instructions and information regarding versions and minimum values, as well
as standards and guidelines for heating components in the instructions must
be observed.
WARNING
Severe injuries and damage can be caused by an inadequate flue gas system.
Problems with the flue gas system, such as poor cleaning of the flue pipe or insuf‐
ficient chimney draught, can cause serious faults in combustion (such as sponta‐
neous combustion of carbonisation gases or flash fires).
Take the following precautions:
❒ Optimum boiler performance can only be guaranteed if the flue gas system is
functioning correctly.
Safety 2
General safety information
Operating Instructions SP Dual (Touch) | B0900113_en 7

2.4 Permitted uses
The Froling Dual fuel boiler SP Dual is designed solely for heating domestic water.
Only use fuels specified in the "Permitted fuels" section.
⇨ See "Permitted fuels" [page 9]
The unit should only be operated when it is in full working order. It should be operated
in accordance with the instructions, observing safety precautions, and you should en‐
sure you are aware of the potential hazards. The inspection and cleaning intervals in
the operating instructions should be observed. Ensure that any faults which might im‐
pair safety are rectified immediately.
The manufacturer or supplier is not liable for any damage resulting from non-permitted
uses.
2.4.1 The Clean Air Act 1993 and Smoke Control Areas
Under the Clean Air Act local authorities may declare the whole or part of the district of
the authority to be a smoke control area. It is an offence to emit smoke from a chim‐
ney of a building, from a furnance or from any fixed boiler if located in a designated
smoke control area. It is also an offence to acquire an „unauthorised fuel“ for use with‐
in a smoke control area unless it is used in an „exempt“appliance („exempted“ from
the controls which generally apply in the smoke control area). The Secretary of State
for Environment, Food and Rural Affairs has powers under the Act to authorise
smokeless fuels or exempt appliances for use in smoke control areas in England. In
Scotland and Wales this power rests with Ministers in the devolved administrations for
those countries. Separate legislation, the Clean Air (Northern Ireland) Order 1981, ap‐
plies in Northern Ireland. Therefore it is a requirement that fuels burnt or obtained for
use in smoke control areas have been „authorised“ in Regluations and that appliances
used to burn solid fuel in those areas (other than „authorised“ fuels) have been ex‐
empted by an Order made and signed by the Secretary of State or Minister in the de‐
volved administrations.
Further information on the requirements of the Clean Air Act can be found here: http://
smokecontrol.defra.gov.uk
Your local authority is responsible for implementing the Clean Air Act 1993 including
designation and supervision of smoke control areas and you can contact them for de‐
tails of Clean Air Act requirements.
The Froling SP Dual 15, SP Dual 22, SP Dual 28, SP Dual 34 and SP Dual 40 have
been recommended as suitable for use in smoke control areas when burning fuels as
listed under "Permitted fuels".
2Safety
Permitted uses
8 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

2.4.2 Permitted fuels
Firewood
Firewood up to max. 55 cm long.
Water content (w) greater than 15% (equivalent to wood moisture u > 17%)
Water content (w) less than 25% (equivalent to wood moisture u < 33%)
EU: Fuel acc. to EN 14961 - Part 5: Firewood class A2 / D15 L50
Germany
also:
Fuel class 4 (§3 of the First Federal Emissions Protection Ordinance
(BimSchV) in the last amended version)
▪ Values in practice:
- Hardwood: 2 years in dry storage
- Soft wood: 1 year in dry storage
▪Store stacks of split wood sheltered from the rain
▪ Create a dry underlay, where possible with air access (line with round timber, pallets,
etc.)
▪ Use wind-exposed areas where possible for storage (e.g. store at edge of forest instead
of in forest)
▪ Walls of buildings facing the sun are ideal
▪ If possible, stock fuel for the day in a warm place (e.g. in boiler room) (pre-heats the
fuel!)
NOTICE! Use fuels that are consistent in size and water content.
NOTICE! Burning extremely dry fuels (w < 15%) may require repairs by qualified staff.
Please contact Froling customer services or your installer.
Wood pellets
Wood pellets made from natural wood with a diameter of 6 mm
EU: Fuel acc. to EN 14961 - Part 2: Wood pellets class A1 / D06
and/or: Certification program EN
plus or DIN plus
General note:
Before refilling the store, check for pellet dust and clean if necessary.
2.4.3 Fuels permitted under certain conditions
Wood briquettes
Wood briquettes for non-industrial use with a diameter of 5-10 cm and 5-50 cm long.
Water content
Note on standards
Tips for
storing wood
Note on standards
Safety 2
Permitted uses
Operating Instructions SP Dual (Touch) | B0900113_en 9

EU: Fuel acc. to 14961 - Part 3: Wood briquettes class B / D100 L500
Form 1 - 3
Additional for
Germany:
Fuel class 5a (§3 of the First Federal Emissions Protection Ordinance
(BimSchV) in the last amended version)
▪ When burning wood briquettes use the settings for extremely dry fuel
▪Wood briquettes must be heated up with firewood as per EN 14961-5
(at least two layers of firewood under the wood briquettes)
▪ The fuel loading chamber must not be filled more than 3/4 full, as the wood briquettes
expand during combustion
▪ Even when using the settings for dry fuel, burning wood briquettes can cause combus‐
tion problems. In such cases, repairs must be carried out by qualified staff. Please con‐
tact Froling customer services or your installer.
2.4.4 Non-permitted fuels
The use of fuels not defined in the "Permitted fuels" section, and particularly the burn‐
ing of refuse, is not permitted.
CAUTION
In case of use of non-permitted fuels:
Burning non-permitted fuels increases the cleaning requirements and leads to a
build-up of aggressive sedimentation and condensation, which can damage the
boiler and also invalidates the guarantee. Using non-standard fuels can also lead
to serious problems with combustion.
For this reason, when operating the boiler:
❒ Only use permitted fuels
2.5 Qualification of operating staff
CAUTION
If unauthorised persons enter the installation room:
Risk of personal injury and damage to property
❒ The operator is responsible for keeping unauthorised persons, in particular
children, away from the system.
Only trained operators are permitted to operate the unit. The operator must also have
read and understood the instructions in the documentation.
2.6 Protective equipment for operating staff
You must ensure that staff have the protective equipment specified by accident pre‐
vention regulations.
Note on standards
Notes on
use
2Safety
Permitted uses
10 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

▪ For operation, inspection and cleaning:
- suitable work wear
- protective gloves
- sturdy shoes
2.7 Design information
It is forbidden to carry out modifications to the boiler or to change or deactivate safety
equipment.
Always comply with all fire, building, and electrical regulations when installing or oper‐
ating the boiler system, and follow the operating instructions and mandatory regula‐
tions that apply in the country in which the boiler is operated.
2.7.1 Installation and approval of the heating system
The boiler should be operated in a closed heating system. The following standards
govern the installation:
ÖNORM / DIN EN 12828 Heating Systems in Buildings
NOTICE! Each heating system must be officially approved.
The appropriate supervisory authority (inspection agency) must always be informed
when installing or modifying a heating system, and authorisation must be obtained
from the building authorities:
Austria: Inform the civic/municipal building authorities.
Germany: Notify an approved chimney sweep and the building authorities.
2.7.2 General information for installation room (boiler room)
Boiler room characteristics
▪ There must not be a potentially explosive atmosphere in the boiler room as the
boiler is not suitable for use in potentially explosive environments.
▪ The boiler room must be frost-free.
▪ The boiler does not provide any light, so the customer must provide sufficient light‐
ing in the boiler room in accordance with national workplace design regulations.
▪ When using the boiler over 2000 metres above sea level you should consult the
manufacturer.
▪ Danger of fire due to flammable materials.
No flammable materials should be stored near the boiler. Flammable objects (e.g.
clothing) must not be put on the boiler to dry.
▪ Damage due to impurities in combustion air.
Do not use any solvents or cleaning agents containing chlorine in the room where
the boiler is installed.
▪ Keep the air suction opening of the boiler free from dust.
Note on standards
Safety 2
Design information
Operating Instructions SP Dual (Touch) | B0900113_en 11

Ventilation of the boiler room
Ventilation air for the boiler room should be taken from and expelled directly outside,
and the openings and air ducts should be designed to prevent weather conditions (foli‐
age, snowdrifts, etc.) from obstructing the air flow.
Unless otherwise specified in the applicable building regulations for the boiler room,
the following standards apply to the design and dimensions of the air ducts:
ÖNORM H 5170 - Construction and fire protection requirements
TRVB H118 - Technical directives on fire protection/prevention
2.7.3 Requirements for central heating water
The following standards and guidelines apply:
Austria:
Germany:
Switzerland:
Italy:
ÖNORM H 5195-1
VDI 2035
SWKI 97-1
D.P.R. no. 412
NOTICE! Note on filling with make-up water: Always bleed the filling hose before con‐
necting, in order to prevent air from entering the system.
Observe the standards and also follow the recommendations below:
❒Max. cumulative value for alkaline earth: 1.0 mmol/l or 100 mg/l (corresponds to
5.6 dH)
❒ Use softened water as the make-up water
❒ Avoid leaks and use a closed heating system to maintain water quality during op‐
eration
2.7.4 Notes for using pressure maintenance systems
Pressure maintenance systems in hot-water heating systems keep the required pres‐
sure within predefined limits and balance out volume variations caused by changes in
the hot-water temperature. Two main systems are used:
Compressor-controlled pressure maintenance
In compressor-controlled pressure maintenance units, a variable air cushion in the ex‐
pansion tank is responsible for volume compensation and pressure maintenance. If
the pressure is too low, the compressor pumps air into the tank. If the pressure is too
high, air is released by means of a solenoid valve. The systems are built solely with
closed-diaphragm expansion tanks to prevent the damaging introduction of oxygen in‐
to the domestic hot water.
Note on standards
Note on standards
2Safety
Design information
12 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

Pump-controlled pressure maintenance
A pump-controlled pressure maintenance unit essentially consists of a pressure-main‐
tenance pump, relief valve and an unpressurised receiving tank. The valve releases
hot water into the receiving tank if the pressure is too high. If the pressure drops below
a preset value, the pump draws water from the receiving tank and feeds it back into
the heating system. Pump-controlled pressure maintenance systems with open expan‐
sion tanks (e.g. without a diaphragm) introduce ambient oxygen via the surface of the
water, exposing the connected system components to the risk of corrosion. These
systems offer no oxygen removal for the purposes of corrosion control as required by
VDI 2035 and in the interests of corrosion protection should not be used.
2.7.5 Return lift
If the hot water return is below the minimum return temperature, some of the hot water
outfeed will be mixed in.
CAUTION
Risk of dropping below dew point/condensation formation if operated without re‐
turn temperature control.
Condensation water forms an aggressive condensate when combined with com‐
bustion residue, leading to damage to the boiler.
Take the following precautions:
❒ Regulations stipulate the use of a return temperature control.
➥The minimum return temperature is 60 °C. We recommend fitting some
sort of control device (e.g. thermometer).
2.7.6 Combination with storage tank
You can find more detailed information about storage tank design in the boiler assem‐
bly instructions.
NOTICE! See "Design Information" section in the assembly instructions SP Dual
2.7.7 Chimney connection/chimney system
EN 303-5 specifies that the entire flue gas system must be designed to prevent, wher‐
ever possible, damage caused by seepage, insufficient feed pressure and condensa‐
tion. Please note in this respect that flue gas temperatures lower than 160K above
room temperature can occur in the permitted operating range of the boiler.
NOTICE! Please see the technical data contained in the assembly instructions for fur‐
ther information about standards and regulations as well as the flue gas temperatures
when clean and the other flue gas values!
Safety 2
Design information
Operating Instructions SP Dual (Touch) | B0900113_en 13

2.8 Safety Devices
7.1 BOILER OFF
(switches off the boiler to prevent overheating)
❒ Tap “Boiler off"
➥Automatic mode is switched off
➥Control follows the boiler shutdown procedure
➥The pumps continue to run
12 MAIN SWITCH
(switches off the power supply)
Before carrying out work on/in the boiler:
❒ Tap “Boiler off"
➥Automatic mode is switched off
➥Control follows the boiler shutdown procedure
❒ Switch off the main switch and let the boiler cool down
14 HIGH-LIMIT THERMOSTAT (STL)
(protection against overheating)
The STL switches off the combustion system at a maximum boiler temperature of 105
°C. The pumps continue to run. Once the temperature falls below approx. 75°C, the
STL can be reset mechanically.
TA THERMAL DISCHARGE VALVE (TA)
(protection against overheating)
The thermal discharge valve opens at approx. 100°C and feeds cold water to the safe‐
ty heat exchanger to lower the boiler temperature
SV SAFETY VALVE
(protection against overheating/excess pressure)
When the boiler pressure reaches a maximum of 3 bar, the safety valve opens and the
heated water is blown off in the form of steam.
2Safety
Safety Devices
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2.9 Residual risks
WARNING
When the main switch is switched off in heating mode:
The boiler is not controlled. Any resulting boiler malfunctions can cause serious
injury and damage.
Take the following precautions:
❒ Allow the fire to burn out completely and let the boiler cool
➥ID fan switches off when "Off" status has been reached
(flue gas temperature < 80°C, boiler temperature < 65°C)
❒ Only then is it safe to switch off the main switch
WARNING
When touching hot surfaces:
Severe burns are possible on hot surfaces and the flue gas pipe!
When work is carried out on the boiler:
❒ Shut down the boiler in a controlled way (operating status "Off") and allow it to
cool down
❒ Protective gloves must generally be worn for work on the boiler, and it should
only be operated using the handles provided
❒ Insulate the flue pipes or simply avoid touching them during operation.
WARNING
When opening the combustion chamber door, pre-heating door, fuel loading door
during operation:
Opening a door may result in injury or damage or flue gas generation!
Take the following precautions:
❒ It is forbidden to open the doors behind the insulated door during operation!
WARNING
When inspecting and cleaning the boiler with the main switch on:
Serious injuries possible due to automatic boiler startup!
Before inspection and cleaning work in/on the boiler:
❒ Switch the boiler off by tapping “Boiler off”
The boiler follows the shutdown procedure and switches to "Off“ mode
❒ Allow boiler to cool for at least 1 hour
❒ Switch off the main switch and take precautions to prevent accidental switch‐
ing on.
Safety 2
Residual risks
Operating Instructions SP Dual (Touch) | B0900113_en 15

WARNING
If non-permitted fuel types are used:
Non-standard fuels can cause serious faults in combustion (e.g. spontaneous
combustion of carbonisation gases / flash fires) which can lead to serious acci‐
dents!
Take the following precautions:
❒ Only use fuels specified in the "Permitted fuels" section of these operating in‐
structions.
2Safety
Residual risks
16 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

2.10 Emergency procedure
2.10.1 Overheating of the system
If the system overheats and the safety devices fail, proceed as follows:
NOTICE! Do not under any circumstances switch off the main switch or disconnect the
power supply.
❒Keep all the doors on the boiler closed
❒ Switch boiler off by tapping “Boiler OFF”
❒ Open all mixing valve taps, switch on all pumps.
➥The Froling heating circuit control performs this function in automatic operation.
❒ Leave the boiler room and close the door
❒ Open any available radiator thermostat valves
If the temperature does not drop:
❒ Contact the installer or Froling customer services
⇨ See "Addresses" [page 42]
2.10.2 Smell of flue gas
DANGER
If you smell flue gas in the boiler room:
Inhaling toxic flue gas can be fatal!
If you smell flue gas in the room where the boiler is installed:
❒ Keep all the doors on the boiler closed
❒ Shut down the boiler according to procedure
❒ Ventilate the room where the boiler is installed
❒ Close the fire door and doors to living areas
2.10.3 Fire in the system
DANGER
In case of fire in the system:
Risk of death by fire and poisonous gases
Emergency procedure in case of fire:
❒ Leave the boiler room
❒ Close the doors
❒ Inform the fire department
Safety 2
Emergency procedure
Operating Instructions SP Dual (Touch) | B0900113_en 17

3 Operating the system
3.1 Assembly and initial startup
Assembly, installation and initial startup of the boiler must only be carried out by quali‐
fied staff, and these procedures are described in the accompanying assembly instruc‐
tions.
NOTICE! See assembly instructions for the SP Dual
NOTICE
Optimum efficiency and efficient, low-emission operation can only be guaranteed
if the system is set up by trained professionals and the standard factory settings
are observed.
Take the following precautions:
❒Initial startup should be carried out with an authorised installer or with Froling
customer services
The individual steps for initial start-up are explained in the operating instructions for
the controller
NOTICE! See operating instructions for the Lambdatronic SP 3200
The customer is responsible for ensuring the following prior to initial start-up of the
system by Froling customer services:
▪Electrical installation
▪ Installation of water pipes
▪ Flue gas connection including all insulation work
▪ Work must comply with local fire protection regulations
▪ When heating up the boiler for the first time to dry out the fireclay concrete, the
customer must provide approx. 0,5 m³ of dry firewood.
▪ It is essential that the electrician who has carried out the installation work is availa‐
ble when starting up the system for the first time to make any changes to the wir‐
ing which may become necessary.
▪ During initial start-up, operating staff are shown how to use the boiler. It is impera‐
tive for proper handover of the product that those involved are present as this is a
one-off opportunity.
NOTICE
If condensation escapes during the initial heat-up phase, this does not indicate a
fault.
❒Tip: If this occurs, clean up using a cleaning rag.
3Operating the system
Assembly and initial startup
18 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

3.2 Filling the pellet store
CAUTION
Filling the store when the boiler is switched on
could result in damage and consequential injury!
When filling the fuel store:
❒ Switch off the boiler by tapping “Boiler OFF”
➥The boiler follows the shutdown procedure and switches to "Off" status
❒ Allow the boiler to cool for at least half an hour
When the boiler has cooled down:
❒Before filling check the store for fines and clean if necessary
➥Observe the general advice for working in the store.
⇨ See "General advice for working in the store" [page 19]
❒ Close all openings to the store to seal out dust
❒ Fill the store with pellets
➥Only use permitted pellets
⇨ See "Permitted fuels" [page 9]
3.2.1 General advice for working in the store
Risk of injury due to moveable parts!
Shut off the feeder unit before entering the store!
When cleaning the store an increased amount of dust may be gener‐
ated. Wear a dust mask when working in the store.
Adequately ventilate the store before entering. Keep the door open
and always have a second person present. Observe the CO concen‐
tration limit (< 30ppm).
Slick surfaces in the fuel store present a slipping hazard!
Unauthorised access prohibited! Keep children away!
Keep the fuel store locked and store the key in a safe place!
No fire, open flames or smoking in the store!
Operating the system 3
Filling the pellet store
Operating Instructions SP Dual (Touch) | B0900113_en 19

3.3 Heating up the boiler
NOTICE
Do not modify the factory settings!
Changing the system's factory settings can be detrimental to efficiency and emis‐
sions of the system.
3.3.1 Switching on the power supply
❒ Turn on the main switch
➥There is voltage at all of the boiler's components
➥When the control has completed the system start, the boiler is ready for opera‐
tion
3.3.2 Before heating up the boiler
Reloading intervals when operating with storage tank
Reloading intervals and amounts should be determined exclusively according to the
storage tank for efficient and environmentally-friendly heating.
❒ Check the store load status on the display
Load status Procedure
No bars or one bar in the store load status means that the stor‐
age tank needs to be heated up by approx. 35°C.
⇨ See "Determining the right amount of fuel" [page 21]
Two bars in the store load status mean that the storage tank
needs to be heated up by approx. 20°C.
⇨ See "Determining the right amount of fuel" [page 21]
Three or four bars in the store load status mean that the storage
tank cannot take any more heat, or only a small amount. In this
case do not add fuel!
3Operating the system
Heating up the boiler
20 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com