Spartherm Premium User instructions

ASSEMBLY AND OPERATING MANUAL
FIREPLACE INSERTS PREMIUM & LEAN
STATUS 06.2023
The fire of your life.

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
Document information
Assembly and operating manual for fireplace inserts:
•Premium V-1V-87h
•Premium V-FD-87h
•Premium V-2L-55h
•Premium V-2R-55h
•Premium V-2L-68h
•Premium V-2R-68h
•Premium V-2L-80h
•Premium V-2R-80h
•Premium A-3RL-60h
•Premium A-3RL-80h
•Premium A-U-50h
•Premium A-U-70h
•Premium A-U-70h
•Lean 2R-70h
•Lean 2L-70h
•Lean 3RL-70h
The descriptions are identical for all above-mentioned models.
Any differences will be addressed explicitly. Images show the
fireplace insert Premium A-3RL-60h.
The fireplace insert is referred to as the “unit” in this manual.
The full system including the fireplace insert, thermal storage
medium, pipes and chimney is referred to as the “stove system”.
Other applicable documents:
7“Technical Data”
Safety information
.DANGER!
Information marked with the word DANGER indicates a
dangerous situation that will lead to severe injuries or death.
.WARNING!
Information marked with the word WARNING indicates a
dangerous situation that may lead to severe injuries or death.
.CAUTION!
Information marked with the word CAUTION indicates a
situation that may lead to minor to medium injuries.
.ATTENTION!
Information marked with the word ATTENTION indicates a
situation that may lead to property or environmental damage.
Symbol explanation for text
4Action prompt
•List
3Check
5Advice or recommendation
§ Indication of standards or directives
6Reference to other sections of this document
7Reference to other sources to be taken into account
Symbol explanation for images
Fig. No.
A
x
B1.
2.
Highlighting of sections requiring action
1. Numbered action steps
AComponent designation or dimensions
x Dimensions in mm
Movement and direction arrows

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
Table of contents
1. Safety information 4
1.1 Intended use 4
1.2 Authorised target groups 4
1.2.1 Manufacturer 4
1.2.2 Owner 4
1.2.3 Qualified personnel 4
1.2.4 Users 4
1.3 Behaviour in emergencies 5
1.4 Chimney fire 5
1.5 General safety information 5
2. Product information 6
2.1 Functional principle 6
2.2 Operating modes 6
2.3 Material 6
2.4 Protective devices 6
2.5 Models 7
2.6 Product overview 8
2.7 Scope of delivery 10
2.8 Technical data 10
2.9 Nominal heat output 16
2.10 Dimensions 17
3. Types of fuel 18
3.1 Information on types of fuel 18
3.2 Permissible types of fuel 19
3.3 Permissible igniters 19
3.4 Fuel storage 19
3.5 Size of the fuel pieces 19
4. Assembly 20
4.1 Safety information for assembly 20
4.2 Requirements for assembly 20
4.3 Requirements for the installation site 21
4.3.1 Installation room 21
4.3.2 Safety distances 21
4.3.3 Installation dimensions 24
4.3.4 Convection air apertures 25
4.3.5 Flue gas routing 25
4.4 Preparation for assembly 26
4.5 Transporting the unit 26
4.6 Unpacking the unit 27
4.7 Adjusting the counterweight (optional) 27
4.8 Connecting the flue gas routing 29
4.9 Connecting the combustion air line (optional) 30
4.10 Installing the unit on site 31
4.11 Checking the installation 35
4.12 Performing initial start-up 35
4.13 Instructing the owner 35
5. Use 36
5.1 Safety information for use 36
5.2 Heating mode 38
5.2.1 Preparing the heating process 38
5.2.2 Heating up the unit 39
5.2.3 Controlling the heating process 40
5.2.4 Refuelling the unit 41
5.2.5 Ending the heating process 42
6. Cleaning 43
6.1 Safety information for cleaning 43
6.2 Cleaning intervals 43
6.3 Simple cleaning 43
6.4 Annual cleaning 45
7. Service work 46
7.1 Safety information for service work 46
7.2 Maintenance intervals 46
7.3 Maintenance measures 46
7.3.1 Stove system 46
7.3.2 Combustion air and flue gas pipe 46
7.3.3 Firebox door 47
7.3.4 Firebox lining 47
7.3.5 Self-closing firebox door 48
7.4 Malfunction repair 49
8. Disassembly 52
8.1 Safety information for disassembly 52
8.2 Dismantling the unit 52
9. Disposal 53
9.1 Disposing of the packaging 53
9.2 Disposing of the unit 53
10. Appendix 54
10.1 Accessories 54
10.2 Warranty terms 54
10.3 Standards and regulations 54
10.4 Declarations of conformity 54

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Safety information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
1.2.2 Owner
The owner is responsible for the building in which the unit is
used.
The owner has the following tasks:
•Meeting the requirements for the installation site.
•Ensuring that the unit is always in perfect technical
condition.
•Adhering to cleaning and maintenance requirements.
•Instructing the users.
•Providing and adhering to these instructions.
1.2.3 Qualified personnel
Qualified personnel is responsible for installation,
commissioning, maintenance, disassembly and disposal.
Requirements for qualified personnel:
•Practical professional experience or professional training
regarding gas, water and heating systems.
•Experience in installing and maintaining stove systems.
•Experience in the use of electrical and mechanical tools.
•Familiarity with occupational health and safety regulations.
•Knowledge of how to read technical drawings.
•Familiarity with these instructions.
•Documentation of the work performed.
Electrical work may only be performed by qualified electricians.
§ DIN VDE 0100
Requirements for qualified electricians:
•Familiarity with the basics of electrical engineering.
•Familiarity with country-specific regulations and standards.
•Familiarity with the relevant safety regulations.
•Familiarity with these instructions.
1.2.4 Users
Instructed users perform work during use, cleaning and service
work.
Requirements for instructed users:
•The users have been instructed in the safe and intended
use of the unit.
•The users have been instructed with regard to their work by
the owner.
•Familiarity with these instructions.
Special requirements apply to the following users:
•Children aged 8 and over.
•Persons with decreased physical, sensory or mental
capabilities.
•Persons with a lack of experience and knowledge.
These users may only use the unit under the following
conditions:
•The users are supervised.
•The users have been instructed in the safe use of the unit.
•The users understand the dangers of handling the unit.
•Children may not play with the unit.
1. Safety information
1.1 Intended use
The unit is designed to heat the air in a room by burning
suitable types of fuel and is exclusively intended for use in
private households.
The unit is designed as a time-limited fireplace, the burning
time of which can be extended by refuelling it.
§ Time-limited fireplace according to DIN EN 13229,
category 1 a.
The following conditions apply to using the unit:
•Only the appropriately authorised target group may install
or use the unit or perform other activities on the unit.
•The unit must be installed in a dry living space in an
enclosed building.
•Prior to start-up, acceptance by the responsible authorities
is required (in German e.g. the district chimney sweep).
•The unit is exclusively fuelled by natural, air-dried logs
(remaining humidity max. 20 %) or compressed wood
pieces.
§ Compressed wood pieces approved according to
DIN EN ISO 17225-3.
•Extending the combustion period (“permanent fire”)
by fuelling the unit with larger quantities of wood or by
extracting the combustion air is not permissible.
•Operation only with closed firebox door. Only open the door
for heating, refuelling and cleaning.
•The national and regional regulations and directives are
observed.
6“10.3 Standards and regulations” (page 54).
•The requirements and safety information in these
instructions are observed.
Any other use is regarded as unintended use.
The manufacturer is not liable for damage caused by
unintended use.
1.2 Authorised target groups
Authorised target groups are divided into groups of persons
with different levels of authorisation.
1.2.1 Manufacturer
The manufacturer and the manufacturer’s agents have the
following tasks:
•Delivery of a ready-for-installation unit.
•Setting the unit to its factory settings.
•Instructing the owner in the intended use of the unit.

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
Children and pets must be supervised at all times and must be
kept away from the unit.
5We recommend attaching a fixture to protect this group
(e.g. in front of hot unit components).
1.3 Behaviour in emergencies
4Never put yourself at risk of death.
If it is possible without endangering yourself:
4Warn others.
4Instruct others to leave the building.
4Deactivate the unit.
1.4 Chimney fire
The chimney requires regular cleaning (e.g. in Germany by the
district chimney sweep) to prevent formation of a layer of soot
in the chimney.
Burning wood may generate sparks that can enter the chimney
where they may ignite the layer of soot.
Signs of a burning chimney:
•Flames emerge from the mouth of the chimney.
•A large amount of flying sparks.
•Smoke and unpleasant odours.
•Chimney sides grow very hot.
In the event of a chimney fire:
4Alert the fire brigade by calling the emergency services
number.
4Remove flammable objects from the vicinity of the chimney.
Never attempt to extinguish the fire with water!
High temperatures will generate extreme amounts of steam
even from a small amount of water. The resulting pressure can
be a danger to people and can damage buildings or the stove
system.
1.5 General safety information
.WARNING!
Danger due to non-observance of the operating and
assembly instructions!
These instructions contain important information on how
to safely handle the unit. Potential dangers are pointed out
explicitly. Non-observance can lead to severe injuries or death.
4Carefully read these instructions.
4Adhere to the safety information in these instructions.
4Keep the instructions in an accessible place.
The unit may not be used in the following cases:
•If the responsible authorities have not given their approval.
•If the unit or individual components are damaged.
•If unauthorised modifications or changes have been made
to the unit.
•After improper repairs.
•If safety devices are missing or not functional.
•In garages, stairwells or hallways accessible by the general
public.
•In areas at risk of explosion.
In the following cases, the manufacturer shall not accept any
liability for damage:
•If these instructions are not adhered to.
•In the event of unintended use.
•In the event of improper handling.
•If the unit is used by unauthorised target groups.
•If the unit is installed or repaired by unauthorised experts.
•In the event of unauthorised conversions.
•If spare parts are used which were not manufactured or
approved by the manufacturer.
•If the protective devices of the unit are bypassed.
•If maintenance and cleaning intervals are not adhered to.
Depending on the work, always adhere to additional relevant
safety instructions. The safety instructions can be found in the
corresponding chapter of these instructions.
6“4.1 Safety information for assembly” (page 20).
6“5.1 Safety information for use” (page 36).
6“6.1 Safety information for cleaning” (page 43).
6“7.1 Safety information for service work” (page 46).
6“8.1 Safety information for disassembly” (page 52).

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Product information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
2. Product information
2.1 Functional principle
The combustion air flows through the combustion air
connection into the air connection box. From there, the air
is guided to the firebox and combustion. The combustion air
volume can be controlled using a combustion air controller.
2.1 / 1
A
C
B
There are three types of combustion air:
A Primary air
Oxygen-rich, non-preheated fresh air guided toward the fuel
from the bottom. Primary air is primarily used for light-up.
B Secondary air
Pre-heated, variable air flow guided into the firebox from
above to ensure even, efficient combustion.
C Tertiary air (optional – depending on the unit)
Heated, oxygen-rich fresh air, which flows into the firebox
from the rear in addition to the secondary air and reduces
emission generation by fanning the flames.
2.2 Operating modes
The unit can be used in two different operating modes:
•Room air sealed operation –
only for RLU fireplace inserts.
The unit is supplied with combustion air from the outside or
from other rooms (e.g. cellar) through a combustion air line
connected to the rear or bottom of the unit.
§ The unit meets the requirements for approval by DIBt
(German institute for construction technology) for
room air sealed fireplaces and solid fuels according to
DIN 18897-1.
•Room air dependent operation –
for RLA and RLU fireplace inserts.
The unit is supplied with combustion air from the
installation room. The combustion air is supplied to the
unit through the air openings. A combustion air line is not
required but permissible (e.g. for operation together with
controlled ventilation and venting systems).
2.3 Material
The unit consists of a steel body, which meets the requirements
for fireplaces.
§ The unit has been tested according to DIN EN 13229.
The firebox lining contains built-in components or cover panels
made of fireclay, ceramics, vermiculite or refractory concrete.
Cracks may form in these components as a result of e.g.:
•Physical and production-related residual moisture in the
components escaping during the heating process.
•High temperature differences.
Surface cracks do not affect combustion. If wide cracks form
or pieces break out uncovering the unit structure, the firebox
lining must be replaced.
2.4 Protective devices
•High-temperature resistant ceramic glass window.
•Self-closing firebox door.
On delivery, the unit is equipped with a non-self-closing
firebox door.
In the following cases conversion to a self-closing firebox
door is obligatory:
•If legally required (e.g. in Germany).
•In the case of multi-use of the chimney.
If the self-closing door function is used, it is necessary to
adjust the counterweight correctly during installation.
6“4.7 Adjusting the counterweight (optional)”
(page 27).

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
2.5 Models
The product series Premium is available in different designs.
2.5 / 1 2.5 / 2
Premium V-1V-87h Premium V-FD-87h
2.5 / 3 2.5 / 4
Premium V-2L-55h Premium V-2R-55h
2.5 / 5 2.5 / 6
Premium V-2L-68h Premium V-2R-68h
2.5 / 7 2.5 / 8
Premium V-2L-80h Premium V-2R-80h
2.5 / 9 2.5 / 10
Premium A-3RL-60h Premium A-3RL-80h
2.5 / 11 2.5 / 12
Premium A-U-50h Premium A-U-70h

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Product information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
The product series Premium is available in different designs.
2.5 / 13 2.5 / 14
Lean 2L-70h Lean 2R-70h
2.5 / 15
Lean 3RL-70h
2.6 Product overview
2.6 / 1
A
E
B
C
D
F
G
A Door hood
B Solid screen
C Firebox door with ceramic glass
D Door handle
E Firebox with firebox lining
F Ash grate
G Ash pan (below the ash grate)

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
2.6 / 3
A
E
F
C
D
B
A Flue gas connection
B Radiation protection plate (delivery condition)
C Weight shaft lining
D Safety ring
E Counterweight
F Inspection port
2.6 / 2
B
E
A
F
G
D
C
B
E
A Drawbar
B Door lock
C Door locking mechanism
D Baffle plate
E Combustion air controller
F Adjustable legs
G Combustion air connector

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Product information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
2.7 Scope of delivery
2.7 / 1
B
D
G
H
C
A
E
F
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XXXXXXXXXXXxxxxxxxxxxxx XXXXXXXXXXXxxxxxxxxxxxx XXXXXXXXXXXxxxxxxxxxxxx
XXXXXXXXXXXxxxxxxxxxxxx
A Fireplace insert
B Heat protection glove
C Glass cleaner
D Spray paint
E Lighter
F Type plate
G Warranty certificate
H Assembly and operating manual
Optional:
•Combustion control S-Thermatik NEO.
•Secondary air control S-Kamatik 2. (only Premium product
series).
•Electric door lift SESAM III (for opening and closing the
firebox door).
6“10.1 Accessories” (page 54).
2.8 Technical data
Premium V-1V-87h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional) with ancillary heating surface (optional)
Nominal heat output 9.5 kW 9.5 kW 10.9 kW
Heat output
direct / indirect
9.5 /
– kW
9.5 /
– kW
10.9 /
– kW
Heat output range 6.7 –
12.4 kW
6.7 –
12.4 kW
7.6 –
14.2 kW
Energy efficiency class A+ A+ A+
Exhaust mass flow 9.0 g/s 9.6 g/s 10.5 g/s
Exhaust gas temperature 275 °C 286 °C 180 °C
Average CO2content 9.5 % 9.1 % 8.7 %
Room heater annual use
efficiency 72.0 % 70.8 % 78.0 %
Room
heater
emissions
at nominal
heat output
Dust < 40
mg/m³
< 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
< 120
mg/m³
Auxiliary
power con-
sumption
S-Ther-
matik NEO
(optional)
at nominal
heat output –0.004 kW –
at minimum
heat output –0.004 kW –
in stand-
by –0.003 kW –
Max. input volume of
hard wood 2.8 kg/h 2.8 kg/h 2.8 kg/h
Max. input volume of
compressed wood 2.3 kg/h 2.3 kg/h 2.3 kg/h
Efficiency > 80.0 % > 80.0 % > 85.0 %
Combustion air
requirement for room air
dependent operation
29.7
m3/h
31.4
m3/h
34.6
m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa 12.0 Pa
Weight 350 kg 351 kg 350 kg

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
Premium V-FD-87h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional) with ancillary heating surface (optional)
Nominal heat output 10.6 kW 10.6 kW 10.9 kW
Heat output
direct / indirect
10.6 /
– kW
10.6 /
– kW
11.1 /
– kW
Heat output range 7.4 –
13.8 kW
7.4 –
13.8 kW
7.8 –
14.4 kW
Energy efficiency class A+ A+ A+
Exhaust mass flow 10.2 g/s 10.8 g/s 11.8 g/s
Exhaust gas temperature 275 °C 268 °C 190 °C
Average CO2content 9.3 % 9.3 % 8.2 %
Room heater annual use
efficiency 72.0 % 70.8 % 77.0 %
Room
heater
emissions
at nominal
heat output
Dust < 40
mg/m³
< 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
< 120
mg/m³
Auxiliary
power con-
sumption
S-Ther-
matik NEO
(optional)
at nominal
heat output –0.004 kW –
at minimum
heat output –0.004 kW –
in stand-
by –0.003 kW –
Max. input volume of
hard wood 3.1 kg/h 3.1 kg/h 3.1 kg/h
Max. input volume of
compressed wood 2.6 kg/h 2.6 kg/h 2.6 kg/h
Efficiency > 80.0 % > 80.0 % > 85.0 %
Combustion air
requirement for room air
dependent operation
33.8
m3/h
34.3
m3/h
37.8
m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa 12.0 Pa
Weight 297 kg 298 kg 297 kg
Premium V-2L-55h /
Premium V-2R-55h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional) with ancillary heating surface (optional)
Nominal heat output 7.9 kW 7.5 kW 10.9 kW
Heat output
direct / indirect
7.9 /
– kW
7.5 /
– kW
10.9 /
– kW
Heat output range 5.5 –
10.3 kW
5.3 –
9.8 kW
7.6 –
14.2 kW
Energy efficiency class A+ A+ A+
Exhaust mass flow 6.5 g/s 6.8 g/s 8.9 g/s
Exhaust gas temperature 263 °C 269 °C 191 °C
Average CO2content 10.7 % 9.7 % 10.2 %
Room heater annual use
efficiency 75.0 % 72.7 % 77.0 %
Room
heater
emissions
at nominal
heat output
Dust < 40
mg/m³
< 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
< 120
mg/m³
Auxiliary
power con-
sumption
S-Ther-
matik NEO
(optional)
at nominal
heat output –0.004 kW –
at minimum
heat output –0.004 kW –
in stand-
by –0.003 kW –
Max. input volume of
hard wood 2.2 kg/h 2.2 kg/h 2.2 kg/h
Max. input volume of
compressed wood 1.9 kg/h 1.9 kg/h 1.9 kg/h
Efficiency 85.0 % > 85.0 % > 80.0 %
Combustion air
requirement for room air
dependent operation
21.2
m3/h
22.7
m3/h
30.0
m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa 12.0 Pa
Weight 265 kg 267 kg 265 kg

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Product information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
Premium V-2L-68h /
Premium V-2R-68h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional) with ancillary heating surface (optional)
Nominal heat output 9.6 kW 9.7 kW 9.9 kW
Heat output
direct / indirect
9.6 /
– kW
9.7 /
– kW
9.9 /
– kW
Heat output range 6.7 –
12.5 kW
6.8 –
12.6 kW
6.9 –
12.9 kW
Energy efficiency class A+ A+ A+
Exhaust mass flow 8.8 g/s 8.7 g/s 9.3 g/s
Exhaust gas temperature 276 °C 261 °C 195 °C
Average CO2content 9.9 % 10.1 % 8.9 %
Room heater annual use
efficiency 72.0 % 72.8 % 77.0 %
Room
heater
emissions
at nominal
heat output
Dust < 40
mg/m³
< 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
< 120
mg/m³
Auxiliary
power con-
sumption
S-Ther-
matik NEO
(optional)
at nominal
heat output –0.004 kW –
at minimum
heat output –0.004 kW –
in stand-
by –0.003 kW –
Max. input volume of
hard wood 2.8 kg/h 2.8 kg/h 2.8 kg/h
Max. input volume of
compressed wood 2.3 kg/h 2.3 kg/h 2.3 kg/h
Efficiency > 80.0 % > 80.0 % > 85.0 %
Combustion air
requirement for room air
dependent operation
28.8
m3/h
28.2
m3/h
31.1
m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa 12.0 Pa
Weight 310 kg 311 kg 310 kg
Premium V-2L-80h /
Premium V-2R-80h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 10.5 kW 10.2 kW
Heat output direct / indirect 10.5 /
– kW
10.2 /
– kW
Heat output range 7.4 –
13.7 kW
7.1 –
13.3 kW
Energy efficiency class A A+
Exhaust mass flow 12.2 g/s 10.6 g/s
Exhaust gas temperature 272 °C 266 °C
Average CO2content 8.2 % 9.0 %
Room heater annual use efficiency 70.0 % 71.8 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 3.2 kg/h 3.2 kg/h
Max. input volume of compressed
wood 2.6 kg/h 2.6 kg/h
Efficiency 80.0 % > 80.0 %
Combustion air requirement for
room air dependent operation 38.9 m3/h 33.7 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 350 kg 351 kg

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Assembly and operating manual | Premium & Lean | 06.2023 | EN
Premium A-3RL-60h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 10.0 kW 10.0 kW
Heat output direct / indirect 10.0 /
– kW
10.0 /
– kW
Heat output range 7.0 –
13.0 kW
7.0 –
13.0 kW
Energy efficiency class A+ A+
Exhaust mass flow 10.5 g/s 10.2 g/s
Exhaust gas temperature 270 °C 278 °C
Average CO2content 8.9 % 9.1 %
Room heater annual use efficiency 71.0 % 70.8 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 3.0 kg/h 3.0 kg/h
Max. input volume of compressed
wood 2.5 kg/h 2.5 kg/h
Efficiency > 80.0 % > 80.0 %
Combustion air requirement for
room air dependent operation 33.7 m3/h 33.0 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 279 kg 280 kg
Premium A-3RL-80h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 11.4 kW 12.3 kW
Heat output direct / indirect 11.4 /
– kW
12.3 /
– kW
Heat output range 8.0 –
14.8 kW
8.6 –
16.0 kW
Energy efficiency class A A
Exhaust mass flow 12.6 g/s 12.6 g/s
Exhaust gas temperature 275 °C 296 °C
Average CO2content 8.6 % 9.3 %
Room heater annual use efficiency 70.0 % 69.8 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 3.4 kg/h 3.4 kg/h
Max. input volume of compressed
wood 2.9 kg/h 2.9 kg/h
Efficiency 80.0 % 80.0 %
Combustion air requirement for
room air dependent operation 40.3 m3/h 40.3 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 337 kg 338 kg

14
Product information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
Premium A-U-50h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 9.3 kW 9.3 kW
Heat output direct / indirect 9.3 /
– kW
9.3 /
– kW
Heat output range 6.5 –
12.1 kW
6.5 –
12.1 kW
Energy efficiency class A+ A+
Exhaust mass flow 8.5 g/s 7.7 g/s
Exhaust gas temperature 311 °C 294 °C
Average CO2content 10.3 % 11.1 %
Room heater annual use efficiency 71.0 % 72.8 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 2.8 kg/h 2.8 kg/h
Max. input volume of compressed
wood 2.3 kg/h 2.3 kg/h
Efficiency > 80.0 % > 80.0 %
Combustion air requirement for
room air dependent operation 27.2 m3/h 24.6 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 235 kg 236 kg
Premium A-U-70h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 11.4 kW 11.6 kW
Heat output direct / indirect 11.4 /
– kW
11.6 /
– kW
Heat output range 8.0 –
14.8 kW
8.1 –
15.1 kW
Energy efficiency class A+ A+
Exhaust mass flow 11.2 g/s 11.0 g/s
Exhaust gas temperature 296 °C 288 °C
Average CO2content 9.6 % 9.9 %
Room heater annual use efficiency 71.0 % 70.8 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 3.4 kg/h 3.4 kg/h
Max. input volume of compressed
wood 2.8 kg/h 2.8 kg/h
Efficiency > 80.0 % > 80.0 %
Combustion air requirement for
room air dependent operation 35.7 m3/h 35.3 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 357 kg 358 kg

15
Assembly and operating manual | Premium & Lean | 06.2023 | EN
Lean 2L-70h
Lean 2R-70h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 7.9 kW 7.9 kW
Heat output direct / indirect 7.9 /
– kW
7.9 /
– kW
Heat output range 5.5 –
10.3 kW
5.5 –
10.3 kW
Energy efficiency class A+ A
Exhaust mass flow 7.2 g/s 7.6 g/s
Exhaust gas temperature 300 °C 308 °C
Average CO2content 9.3 % 9.3 %
Room heater annual use efficiency 71.0 % 69.8 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 2.4 kg/h 2.4 kg/h
Max. input volume of compressed
wood 2.0 kg/h 2.0 kg/h
Efficiency > 80.0 % 80.0 %
Combustion air requirement for
room air dependent operation 25.6 m3/h 25.9 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 260 kg 261 kg
Lean 3RL-70h
without S-Thermatik NEO (standard) with S-Thermatik NEO (optional)
Nominal heat output 7.5 kW 7.2 kW
Heat output direct / indirect 7.5 /
– kW
7.2 /
– kW
Heat output range 5.3 –
9.8 kW
5.0 –
9.4 kW
Energy efficiency class A+ A+
Exhaust mass flow 6.3 g/s 6.1 g/s
Exhaust gas temperature 311 °C 301 °C
Average CO2content 9.9 % 9.8 %
Room heater annual use efficiency 71.0 % 70.7 %
Room heater
emissions at
nominal heat
output
Dust < 40
mg/m³
< 40
mg/m³
CO < 1250
mg/m³
< 1250
mg/m³
NOx < 200
mg/m³
< 200
mg/m³
OGC < 120
mg/m³
< 120
mg/m³
Auxiliary power
consumption
S-Thermatik
NEO (optional)
at nominal
heat output –0.004 kW
at minimum
heat output –0.004 kW
in stand-
by –0.003 kW
Max. input volume of hard wood 2.2 kg/h 2.1 kg/h
Max. input volume of compressed
wood 1.9 kg/h 1.8 kg/h
Efficiency > 80.0 % > 80.0 %
Combustion air requirement for
room air dependent operation 22.8 m3/h 22.1 m3/h
Delivery pressure at
nominal heat output 12.0 Pa 12.0 Pa
Weight 231 kg 232 kg

16
Product information
Assembly and operating manual | Premium & Lean | 06.2023 | EN
Information on the model (e.g. type, inspection number, year of
manufacture) can be found on the type plate.
The type plate is required for regular inspection of the unit
(e.g. in Germany by the chimney sweep).
6Figure 2.7 / 1 (page 10).
7For further information and versions with an optional scope
of delivery, refer to the separate document “Technical
Data”.
2.9 Nominal heat output
The nominal heat output of the unit can be checked in the
defined position “NHO position” of the combustion air slider.
To adjust the NHO position, first move the combustion air slider
all the way down to close the air supply. Then position a ruler
on the bottom screen to measure the following intersection:
•Line that divides the combustion air slider in half lengthwise.
•Edge of the round opening of the combustion air slider.
2.9 / 1
==
2.9 / 2
A
Starting from the measured intersection, push the combustion
air slider upwards by value (A).
•Premium V-1V-87h – 21 mm
•Premium V-FD-87h – 16 mm
•Premium V-2L-55h – 17 mm
•Premium V-2R-55h – 17 mm
•Premium V-2L-68h – 16 mm
•Premium V-2R-68h – 16 mm
•Premium V-2L-80h – 26 mm
•Premium V-2R-80h – 26 mm
•Premium A-3RL-60h – 10 mm
•Premium A-3RL-80h – 19 mm
•Premium A-U-50h – 15 mm
•Premium A-U-70h – 26 mm
•Lean 2L-70h – 27 mm
•Lean 2R-70h – 27 mm
•Lean 3RL-70h – 22 mm
The nominal heat output can only be achieved by adjusting
the NHO position under test bench conditions. In heating
mode the value represents an approximate value. The ideal
position of the combustion air slider depends on the situation
and is affected by a variety of factors.
6“5.2.3 Controlling the heating process” (page 40).

17
Assembly and operating manual | Premium & Lean | 06.2023 | EN
2.10 Dimensions
2.10 / 1
H
BH
BB
ø A
ø V
HTotal height
BB Screen width 1
BH Screen height
TTotal depth
øADiameter of flue gas connection
øVDiameter of combustion air connection
1The total width of the unit may be larger.
Dimensions (mm) Premium V-1V-87h Premium V-FD-87h Premium V-2L-55h Premium V-2R-55h Premium V-2L-68h Premium V-2R-68h
H 1561 1561 1561 1561 1636 1636
BB 888 888 642 642 772 772
BH 501 501 501 501 501 501
T 564 640 495 495 492 492
ø A 200 200 180 180 250 250
ø V 150 150 150 150 150 150
Dimensions (mm) Premium V-2L-80h Premium V-2R-80h Premium A-3RL-60h Premium A-3RL-80h Premium A-U-50h Premium A-U-70h
H 1636 1636 1636 1636 1735 1735
BB 895 895 772 972 675 675
BH 501 501 501 501 501 501
T 594 594 625 655 747 675
ø A 250 250 200 200 200 200
ø V 150 150 150 150 150 150
Dimensions
(mm)
Lean 2L-70h Lean 2R-70h Lean 3RL-70h
H 1457 1457 1465
BB 768 1 768 1 834
BH 492 492 492
T 478 478 468
ø A 150 150 150
ø V 100 100 100
1Total width of the unit: 873 mm.

18
Types of fuel
Assembly and operating manual | Premium & Lean | 06.2023 | EN
3. Types of fuel
3.1 Information on types of fuel
Wood primarily consists of cellulose, lignin, resins, fats and
oils. Wood does not burn directly. The components of wood
become gaseous at different temperatures and burn up if
enough oxygen is available.
Using fuel with a residual moisture of > 20 % will lead to
decreased output and increased emissions.
Good, fast combustion and good gas release are crucial for
problem-free operation of the unit.
Bark prevents moisture from escaping. Gas release is only
ensured at “injured” sections of wood, making it necessary to
split the wood.
If the temperatures required for gas release and clean
combustion are not reached, this will interfere with combustion.
The unburned substances will negatively impact the
environment and will adhere to the stove system as deposits
(e.g. soot, tar). These deposits increase the effort required for
cleaning and may damage the stove system.
Hardwood is particularly suitable as firewood. It burns slowly
with a calm flame and turns into embers that glow for a long
time.
Softwood is rich in resin, burns faster and has an increased
tendency to generate sparks.
5We recommend beech wood as the ideal fuel.
§ According to DIN EN 13229 a combustion period of
45 min in a time-limited fireplace requires a fuel volume of
2.2 – 3.7 kg of wood (depending on the model).
6“2.8 Technical data” (page 10).
3.1 / 1
170 – 330
~ 80
~ 80
2.2 kg of wood corresponds to two average logs (length
170 – 330 mm, width / height approx. 80 mm).
1 kg of beech wood generates an output of approx. 4 kW.
Compressed wood pieces have an approx. 20 % higher output.

19
Assembly and operating manual | Premium & Lean | 06.2023 | EN
3.2 Permissible types of fuel
Only the following types of fuel are approved for use:
•Natural, air-dried split logs (residual moisture max. 20 %).
•Compressed wood pieces
§ Compressed wood pieces according to
DIN EN ISO 17225-3.
The following fuel types are not permissible:
•Chemically treated wood
•Painted or varnished wood
•Synthetically coated wood
•Damp wood (residual moisture higher than 20 %)
•Chipboards
•Wood of Euro pallets
•Trimmings
•Bark waste
•Pellets
•Coal
•Coke
•Household waste
•Plastics
•Waste paper
•Old clothes
§ Burning non-permissible types of fuel is punishable by law
in many countries e.g.:
•In Germany as a violation of the Federal Immission
Control Act (BImSchG).
•In Switzerland as a violation of the Clean Air Act (LRV).
3.3 Permissible igniters
The following igniters are permissible:
•Igniter cube
•Igniter pad
•Wood wool igniter
•Igniter wood
Other igniter types are not permitted.
Never use:
•Flammable fluids and fire accelerants (e.g. ethyl alcohol or
kerosene) – there is a risk of deflagration!
•Paper – burns fast and results in flying ash!
3.4 Fuel storage
Storage outside of buildings:
•If possible, store the fuel on the sunny side of a building.
•Ensure that the storage location is ventilated and protected
against precipitation.
•Stack logs loosely along a wall and support them on at
least one side.
•Ensure that there is a gap between logs so that the air
flowing through them can carry off the moisture escaping
from the wood surface.
Storage in buildings:
•In a dry and well-ventilated room.
Storage of freshly cut (green) wood in film or in closed rooms
without sufficient air exchange prevents drying and causes the
wood to become mouldy.
Storage period:
•At least one year for soft wood (e.g. coniferous wood,
poplar).
•At least two years for hard wood (e.g. beech, oak).
5We recommend a drying period of 2 – 3 years.
3.5 Size of the fuel pieces
•Small logs (width / height approx. 60 mm) for fast burning
and briefly high output.
•Large logs (width / height approx. 100 mm) for slow, even
burning.
Ideal log size:
•Length ideally approx. 180 mm.
•Maximum length 330 mm.
•Width / height approx. 80 mm.

20
Assembly
Assembly and operating manual | Premium & Lean | 06.2023 | EN
4. Assembly
4.1 Safety information for assembly
.WARNING!
Danger due to non-adherence to assembly instructions!
Incorrect assembly of the unit may lead to severe injuries. This
chapter contains important information for safe assembly of
the unit.
4Carefully read this chapter prior to assembly.
4Adhere to the the safety information.
4Perform the assembly work as described.
Only qualified personnel may assemble the unit.
Electrical work may only be performed by qualified
electricians.
,“1.2.3 Qualified personnel” (page 4).
The owner is responsible for meeting the requirements for the
installation site.
,“1.2.2 Owner” (page 4).
To prevent danger, always adhere to the following
requirements:
•Do not store or deposit flammable materials or fluids on or
near the unit.
•Do not position flammable objects (e.g. furniture, carpets,
flowers) in front of the firebox opening.
•Ensure that the unit is undamaged and in perfect condition
prior to assembly.
•Before assembling the unit, ensure that the prerequisites for
assembly and the requirements for the installation site are
met, in particular the legal requirements for fireplaces.
4.2 Requirements for assembly
The stove system must be installed and operated according
to the valid standards and directives. Note the following
documents and / or regulations prior to assembly:
•Technical documents of the product.
•Local fire safety regulations issued by the responsible
authorities.
•Provisions under building law.
•Relevant state building and firing installation regulations.
•Local construction regulations regarding the installation
conditions (e.g. firing installation regulations).
As an example, the following applies in Germany:
§ Fireplace inserts fired by solid fuel according to
DIN EN 13229.
§ Residential solid fuel burning appliances according to EN
16510-2-2:2022.
§ Chimney and flue gas connection according to DIN 18160.
§ Chimney dimensions according to DIN EN 13384-1,
DIN EN 13384-2.
§ BlmSchV Second directive for implementation of the
German Federal Immission Control Act.
§ TROL Professional regulations of the tiled stove and air
heater construction trade (ZVSHK).
3The general technical approval has been given by the
building authorities or the manufacturer has applied for it.