Fröling T4e 20 User manual

Installation instructions
Wood chip boiler T4e 20-180
Translation of original German version of installation instructions for technicians.
Read and follow all instructions and safety instructions.
All errors and omissions excepted.
M1980822_en | Edition 31/10/2022

Table of contents
ii M1980822_en | Installation instructions Wood chip boiler T4e 20-180
1 General ......................................................................................................................................................... 4
1.1 About this manual ................................................................................................................................. 4
2 Safety............................................................................................................................................................ 5
2.1 Hazard levels of warnings ..................................................................................................................... 5
2.2 Qualification of assembly staff .............................................................................................................. 6
2.3 Personal protective equipment for assembly staff ................................................................................ 6
3 Design Information...................................................................................................................................... 7
3.1 Overview of standards .......................................................................................................................... 7
3.1.1 General standards for heating systems ..................................................................................... 7
3.1.2 Standards for structural and safety devices............................................................................... 7
3.1.3 Standards for heating water....................................................................................................... 7
3.1.4 Regulations and standards for permitted fuels .......................................................................... 8
3.2 Installation and approval ....................................................................................................................... 8
3.3 Installation site ...................................................................................................................................... 8
3.4 Chimney connection/chimney system................................................................................................... 9
3.4.1 Connection line to the chimney.................................................................................................. 10
3.4.2 Measuring port ........................................................................................................................... 11
3.4.3 Draught limiter............................................................................................................................ 11
3.4.4 Explosion flap............................................................................................................................. 11
3.5 Combustion air ...................................................................................................................................... 12
3.5.1 Combustion air supply at the installation room .......................................................................... 12
3.5.2 Simultaneous operation with other air-drawing systems............................................................ 13
3.6 Domestic hot water ............................................................................................................................... 14
3.7 Pressure maintenance systems ............................................................................................................ 15
3.8 Storage tank.......................................................................................................................................... 16
3.9 Return temperature control ................................................................................................................... 16
3.10 Boiler ventilation.................................................................................................................................... 16
4 Technical information ................................................................................................................................. 17
4.1 Dimensions T4e 20-180 ........................................................................................................................ 17
4.2 Components and connections............................................................................................................... 19
4.3 Technical specifications ........................................................................................................................ 20
4.3.1 T4e 20 - 35................................................................................................................................. 20
4.3.2 T4e 20 - 35 ESP ........................................................................................................................ 21
4.3.3 T4e 45 - 60................................................................................................................................. 23
4.3.4 T4e 45 - 60 ESP ........................................................................................................................ 24
4.3.5 T4e 80 - 110............................................................................................................................... 26
4.3.6 T4e 80 - 110 ESP ...................................................................................................................... 27
4.3.7 T4e 130 - 150............................................................................................................................. 29
4.3.8 T4e 130 - 150 ESP .................................................................................................................... 30
4.3.9 T4e 160 - 180............................................................................................................................. 32
4.3.10 T4e 160 - 180 ESP .................................................................................................................... 33
4.3.11 Boiler data for planning the flue gas system .............................................................................. 35
4.3.12 Data for planning a backup power supply.................................................................................. 37
5 Transport and storage ................................................................................................................................ 38
5.1 Delivery configuration............................................................................................................................ 38
5.2 Temporary storage................................................................................................................................ 38
5.3 Positioning............................................................................................................................................. 39
5.4 Positioning at the installation site .......................................................................................................... 40
5.4.1 Remove boiler from pallet .......................................................................................................... 40
5.4.2 Operating and maintenance areas of the equipment................................................................. 42

Table of contents
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 iii
6 Assembly ..................................................................................................................................................... 43
6.1 Assembly overview ............................................................................................................................... 43
6.2 Accessories supplied ............................................................................................................................ 43
6.3 Installing the boiler ................................................................................................................................ 44
6.3.1 Levelling the boiler ..................................................................................................................... 44
6.3.2 Installing the stoker unit ............................................................................................................. 44
6.3.3 Control the return temperature control....................................................................................... 46
6.3.4 Install line regulating valve (T4e 20-60 - optional) ..................................................................... 47
6.3.5 Install line regulating valve (T4e 80-180 - optional) ................................................................... 48
6.3.6 Adjusting the height of the ash container................................................................................... 49
6.4 Hydraulic connection............................................................................................................................. 50
6.5 Electrical connection ............................................................................................................................. 52
6.5.1 Board overview .......................................................................................................................... 53
6.5.2 Laying cables ............................................................................................................................. 55
6.5.3 Attach the mains connection to the boiler .................................................................................. 56
6.5.4 Potential equalisation................................................................................................................. 56
6.6 Final installation steps........................................................................................................................... 57
6.6.1 Insulate the connection line ....................................................................................................... 59
6.6.2 Install the brackets for accessories............................................................................................ 59
6.6.3 Stick on an additional identification plate (applicable to T4e ESP)............................................ 60
7 Start-up......................................................................................................................................................... 61
7.1 Before commissioning / configuring the boiler ...................................................................................... 61
8 Decommissioning ....................................................................................................................................... 62
8.1 Mothballing............................................................................................................................................ 62
8.2 Disassembly.......................................................................................................................................... 62
8.3 Disposal ................................................................................................................................................ 62

1 | General
4 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
1 General
Thank you for choosing a quality product from Froling. The product features a state-of-
the-art design and conforms to all currently applicable standards and testing guidelines.
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
documentation makes a significant contribution to safe, appropriate, environmentally
friendly and economical operation of the system.
The constant further development of our products means that there may be minor
differences from the pictures and content. If you discover any errors, please let us know:
[email protected].
Subject to technical change.
Issuing a delivery
certificate The EC Declaration of Conformity is only valid in conjunction with a delivery certificate,
which has been filled in correctly and signed as part of the commissioning process. The
original document remains at the installation site. Commissioning installers or heating
engineers are requested to return a copy of the delivery certificate together with the
guarantee card to Froling. On commissioning by FROLING Customer Service the validity
of the delivery certificate will be noted on the customer service record.
1.1 About this manual
These installation instructions contain information for the following boiler sizes T4e / T4e
ESP:
20, 25, 30, 35, 45, 50, 60, 80, 90, 100, 1081), 110, 130, 140, 150, 160, 170, 180;
1) T4e 108 and T4e 108 ESP only available in Italy

Safety | 2
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 5
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.
NOTICE
The dangerous situation may occur and if measures are not observed it will lead to
damage to property or pollution.

2 | Safety
6 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
2.2 Qualification of assembly staff
CAUTION
Assembly and installation by unqualified persons:
Risk of personal injury and damage to property
During assembly and installation:
rObserve the instructions and information in the manuals
rOnly allow appropriately qualified personnel to work on the system
Assembly, installation, initial startup and servicing must always be carried out by qualified
personnel:
- Heating technician / building technician
- Electrical installation technician
- Froling customer services
The assembly staff must have read and understood the instructions in the documentation.
2.3 Personal protective equipment for assembly staff
You must ensure that staff have the protective equipment specified by accident
prevention regulations!
▪ During transport, erection and installation:
- wear suitable work wear
- wear protective gloves
- wear safety shoes (min. protection class S1P)

Design Information | 3
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 7
3 Design Information
3.1 Overview of standards
Perform installation and commissioning of the system in accordance with the local fire
and building regulations. Unless contrary to other national regulations, the latest versions
of the following standards and guidelines apply:
3.1.1 General standards for heating systems
EN 303-5 Boilers for solid fuels, manually and automatically fed combustion
systems, nominal heat output up to 500 kW
EN 12828 Heating systems in buildings - design of water-based heating
systems
EN 13384-1 Chimneys - Thermal and fluid dynamic calculation methods
Part 1: Chimneys serving one appliance
ÖNORM H 5151 Planning of central hot water heating systems with or without hot
water preparation
ÖNORM M 7510-1 Guidelines for checking central heating systems
Part 1: General requirements and one-off inspections
ÖNORM M 7510-4 Guidelines for checking central heating systems
Part 4: Simple check for heating plants for solid fuels
3.1.2 Standards for structural and safety devices
ÖNORM H 5170 Heating installation - Requirements for construction and safety
engineering, as well as fire prevention and environmental protection
TRVB H 118 Technical directives for fire protection/prevention (Austria)
3.1.3 Standards for heating water
ÖNORM H 5195-1 Prevention of damage by corrosion and scale formation in closed
warm water heating systems at operating temperatures up to 100°C
(Austria).
VDI 2035 Prevention of damage hot water heating systems (Germany)
SWKI BT 102-01 Water quality for heating, steam, cooling and air conditioning
systems (Switzerland)
UNI 8065 Technical standard regulating hot water preparation.
DM 26.06.2015 (Ministerial Decree specifying the minimum
requirements)
Follow the instructions of this standard and any related updates.
(Italy)

3 | Design Information
8 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
3.1.4 Regulations and standards for permitted fuels
1. BImSchV First Order of the German Federal Government for the
implementation of the Federal Law on Emission Protection
(Ordinance on Small and Medium Combustion Plants) in the version
published on 26 January 2010,
BGBl. JG 2010 Part I No. 4.
EN ISO 17225-2 Solid bio-fuel - Fuel specifications and classes
Part 2: Wood pellets for use in industrial and domestic systems
EN ISO 17225-4 Solid bio-fuel - Fuel specifications and classes
Part 4: Wood chips for non-industrial use
3.2 Installation and approval
The boiler should be operated in a closed heating system. The following standards
govern the installation:
Note on standards EN 12828 - Heating Systems in Buildings
IMPORTANT: Every 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: report to the construction authorities of the community or magistrate
Germany: report new installations to an approved chimney sweep / the building
authorities.
3.3 Installation site
Requirements for the load bearing substrate:
▪ Flat, clean and dry
▪ Non-combustible and with sufficient load-bearing capacity
Conditions at the installation site:
▪ Frost-free
▪ Sufficiently well lit
▪ Free of explosive atmospheres such as flammable substances, hydrogen halides,
cleaning agents and consumables
▪ Installation at altitude higher than 2000 metres above sea level only after consultation
with the manufacturer
▪ The system must be protected against gnawing and nesting by animals (such as
rodents)
▪ No flammable materials in proximity to the system

Design Information | 3
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 9
3.4 Chimney connection/chimney system
1
2
3
4
5
1Connection line to the chimney
2Measuring port
3Draught limiter
4Explosion flap (for automatic boilers)
5Thermal insulation
NOTICE!The chimney must be authorised by a smoke trap sweeper or chimney
sweep.
The entire flue gas system (chimney and connection) must be laid out as per ÖNORM /
DIN EN 13384-1 or ÖNORM M 7515 / DIN 4705-1.
The flue gas temperatures (for clean systems) and additional flue gas values can be
found in the table in the technical data.
Local regulations and other statutory regulations are also applicable.
EN 303-5 specifies that the entire flue gas system must be designed to prevent, wherever
possible, damage caused by seepage, insufficient feed pressure and condensation.
Please note within the permissible operating range of the boiler flue gas temperatures
lower than 160K above room temperature may occur.

3 | Design Information
10 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
3.4.1 Connection line to the chimney
Requirements for the connection line:
▪ this should be as short as possible and follow an upward incline to the chimney (30 -
45° recommended)
▪ thermally insulated
MFeuV1) (Germany) EN 15287-1 and EN 15287-2
400
100
[mm]
D
20
23
3 x D
[mm]
D
(min. 375)
1,5 x D
(min. 200)
2
4
1. Observe the fire regulations of the respective federal state
2. Component made of flammable material
3. Nonflammable insulating material
4. Radiation shield with rear ventilation
Minimum distance from flammable substances as per MFeuV1) (Germany):
▪ 400 mm excluding thermal insulation
▪ 100 mm if at least 20 mm thermal insulation is installed
Minimum distance from flammable materials as per EN 15287-1 and EN 15287-2:
▪ 3 x nominal diameter of connection line, but at least 375 mm (NM)
▪ 1.5 x nominal diameter of connection line for radiation shield with rear ventilation, but
at least 200 mm (NM)
NOTICE!The minimum distances must be observed in accordance with the
standards and guidelines applicable in the region

Design Information | 3
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 11
3.4.2 Measuring port
For emissions measurement on the system, a suitable measuring port must be installed
in the connection line between the boiler and chimney system.
2 x D
D
D
M
Upstream of the measuring port (M) there should be a straight run-in section with a length
about twice the diameter (D) of the connection line. Downstream of the measuring port
(M) there should be a straight run-out section with a length about the diameter (D) of the
connection line. The measuring port must remain closed whenever the system is in
operation.
The diameter of the measuring probe used by Froling customer service is 14 mm. To
avoid measuring errors due to the ingress of false air, the diameter of the measuring port
must not exceed 21mm.
3.4.3 Draught limiter
We generally recommend the installation of a draught limiter. A draught limiter must be
installed if the maximum permissible feed pressure as given in the boiler data for planning
the flue gas system is exceeded.
NOTICE!Install the draught limiter directly under the mouth of the flue line, as the
pressure is constantly low at this point.
3.4.4 Explosion flap
TRVB H 118 (only Austria) stipulates that an explosion flap must be installed in the
connection line to the chimney, directly next to the boiler. It should be situated in such a
way that is poses no risk to persons!

3 | Design Information
12 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
3.5 Combustion air
12
4
3
1Boiler in room air-dependent operation
2Air extraction system (such as centralised dust extraction system, room ventilation)
3Under-pressure monitoring system
4Combustion air supply from outside
3.5.1 Combustion air supply at the installation room
The system is operated in open flue mode, i.e. the combustion air required to operate the
boiler is drawn from the installation room.
Requirements:
▪ Opening to the atmosphere
– Weather conditions must not affect the air flow in any way (e.g. snow and foliage)
– Cross-section area free of obstructions such as cover gratings and slats
▪ Air supply lines
– For air supply lines longer than 2 metres and where mechanical means are used
to feed combustion air, the flow rate must be calculated (maximum flow rate = 1 m/
s)
Note on standards ÖNORM H 5170 - Construction and fire protection requirements
TRVB H118 - Technical directives on fire protection/prevention

Design Information | 3
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 13
3.5.2 Simultaneous operation with other air-drawing systems
Where the boiler is operated in room air-dependent mode with simultaneous operation of
other air-drawing systems (such as room ventilation), safety devices are necessary:
▪ Air pressure monitor
▪ Flue gas thermostat
▪ Window-tilting drive system, window-tilting switch
NOTICE!Clarify the safety devices with appropriate flue sweep / chimney sweep
Recommendation for room ventilation:
Use “intrinsically-safe” room ventilation systems with F classification
As a basic rule:
▪ Room under-pressure max. 8Pa
▪ Air-drawing systems must not exceed the room under-pressure value
– If the room under-pressure value is exceeded, safety equipment (under-pressure
monitoring system) is necessary
In Germany, the following additional requirement must be observed:
A gauge that monitors the negative pressure gauge (e.g. air pressure sensor P4) and is
approved by the DIBt (German Technical Authority in the Construction Sector) must be
used. This monitor tracks the maximum negative pressure of 4 Pa at the installation site.
In addition, at least one of the following three requirements must be met:
(Source: Section 4 MFeuV 2007 / 2010)
▪ Dimension the cross-section of the combustion air opening so that when the boiler is
in operation the maximum under-pressure is not exceeded (simultaneous operation)
▪ Use safety equipment that prevents simultaneous operation (alternate operation)
▪ Monitor the flue gas outlet using safety devices (such as a flue gas thermostat)
Simultaneous operation
An approved safety system (such as an air pressure monitor) ensures that during
simultaneous operation of the boiler and the air-drawing appliance the pressure
conditions are maintained. In the event of a fault, the safety system will switch off one of
the air-drawing systems.
Alternating operation
An approved safety system (such as a flue gas thermostat) ensures (e.g. by switching off
the power supply) that the boiler cannot be operated simultaneously with the air-drawing
appliance.

3 | Design Information
14 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
3.6 Domestic hot water
Unless contrary to other national regulations, the latest versions of the following
standards and guidelines apply:
Austria:
Germany:
ÖNORM H 5195
VDI 2035
Switzerland:
Italy:
SWKI BT 102-01
UNI 8065
Observe the standards and also follow the recommendations below:
rAim for a pH value of between 8.2 and 10.0. If the central heating water comes into
contact with aluminium, the pH value must be between 8.2 and 9.0
rUse prepared water which complies with the standards cited above for filling and
make-up water
rAvoid leaks and use a closed heating system to maintain water quality during
operation
rWhen filling with make-up water, always bleed the filling hose before connecting, in
order to prevent air from entering the system
rThe heating water must be clear and free from substances that lead to sediments.
rWith regard to corrosion protection, the use of fully demineralised filling and make-up
water with an electrical conductivity of up to 100 µS/cm is recommended in
accordance with EN 14868
Advantages of low-salt or fully demineralised water:
▪ Complies with the applicable standards
▪ Less of a drop in output due to reduced limescale build-up
▪ Less corrosion due to fewer aggressive substances
▪ Long-term cost savings thanks to improved energy efficiency
Filling and make-up water as well as heating water in accordance with VDI 2035:
Total heat output in kW Total earth alkalis in mol/m³ (total hardness in °dH)
Specific system volume in l/kW heat output1)
≤ 20 20 to ≤40 > 40
≤ 50
specific water content
heat generator ≥ 0.3 l/kW2)
none ≤ 3.0 (16.8) < 0.05 (0.3)
≤ 50
specific water content
heat generator < 0.3 l/kW2)
(e.g. circulation water heater) and
systems with electric heating
elements
≤ 3.0 (16.8) ≤ 1.5 (8.4)
> 50 to ≤ 200 ≤ 2.0 (11.2) ≤ 1.0 (5.6)
> 200 to ≤ 600 ≤ 1.5 (8.4) < 0.05 (0.3)
> 600 < 0.05 (0.3)
1. For calculating the specific system volume, the smallest individual heating capacity is to be used for systems with several heat generators.
2. In systems with several heat generators with different specific water contents, the smallest specific water content is decisive in each case.

Design Information | 3
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 15
Additional requirements for Switzerland
The filling and make-up water must be demineralised (fully purified)
▪ The water must not contain any ingredients that could settle and accumulate in the system
▪ This makes the water non-electroconductive, which prevents corrosion
▪ It also removes all the neutral salts such as chloride, sulphate and nitrate which can weaken
corrosive materials in certain conditions
If some of the system water is lost, e.g. during repairs, the make-up water must also be
demineralised. It is not enough to soften the water. The heating system must be professionally
cleaned and rinsed before filling the units.
Inspection:
▪ After eight weeks, the pH value of the water must be between 8.2 and 10.0. If the central
heating water comes into contact with aluminium, the pH value must be between 8.0 and 8.5
▪ Yearly. Values must be recorded by the owner
3.7 Pressure maintenance systems
Pressure maintenance systems in hot-water heating systems keep the required pressure
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
expansion 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 into the
heating water.
Pump-controlled pressure maintenance
A pump-controlled pressure maintenance unit essentially consists of a pressure-
maintenance 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 expansion
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.

3 | Design Information
16 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
3.8 Storage tank
NOTICE
In principle it is not necessary to use a storage tank for the system to run smoothly.
However we recommend that you use the system with a storage tank, as this ensures a
continuous supply of fuel in the ideal output range of the boiler.
For the correct dimensions of the storage tank and the line insulation (in accordance with
ÖNORM M 7510 or guideline UZ37) please consult your installer or Fröling.
Additional requirements for Switzerland in accordance with LRV Appendix 3, section 523
Automatic boilers with a rated thermal output ≤ 500 kW must be equipped with a heat
accumulator of a volume of at least 25 litres per kW rated thermal output.
3.9 Return temperature control
As long as the hot water return is below the minimum return temperature, part of the hot
water flow is added. This function is assumed by the function which increases the
temperature inside the boiler.
3.10 Boiler ventilation
rFit the automatic ventilating valve at the highest point on the boiler or at the ventilation
connection (if present).
ÄThis ensures that air in the boiler is constantly expelled, thus preventing
malfunctions caused by air in the boiler
rCheck that the boiler ventilation is working properly
ÄAfter installation and periodically according to manufacturer’s instructions
Tip: rFit a vertical pipe as a calming section in front of the automatic ventilating valve in
such a way that the ventilating valve is positioned above the water level in the boiler
Recommendation: rFit a microbubble separator in the pipes to the boiler
ÄFollow the manufacturer's instructions!

Technical information | 4
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 17
4 Technical information
4.1 Dimensions T4e 20-180
H2
H1
L4
L3
L5
L2
L6
B3B2
B1
B4
L1
Dimensi
on
Description 20-35 45-60 80-110 130-180
L1 Distance between safety heat exchanger
connections1)
mm - 65
L2 Distance between safety heat exchanger
connection and front of the boiler1)
- 850
L3 Length of particle separator (optional) 370 370 550 715
L4 Distance between stoker and back of the boiler 690 770 890 1165
L5 Boiler length 1170 1270 1415 1770
L6 Total length 1475 1575 1795 2110
B1 Width of particle separator (optional) 165 165 165 165
B2 Width of stoker unit 770 770 770 780
B3 Width, boiler 640 640 800 785
B4 Total width, including stoker unit 1410 1410 1570 1565
H1 Total height incl. flue gas nozzle 1545 1745 1790 1895
H2 Height, boiler 1490 1690 1740 1840
1. Safety heat exchanger connection opposite stoker

4 | Technical information
18 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
H8 H8
H7 H7
H6
H5 H4
H3
H6
H5 H4
H3
B9
B10 B10
B8
B7 B13
B12
B6 B5 B6 B11
B9
Dimensi
on
Description 20-35 45-60 80-110 130-180
W5 Distance to flow connection (stoker left) mm 515 515 660 655
B6 Distance between flue gas pipe connection and
side of boiler
240 240 295 275
W7 Distance between rear flue gas pipe and side of
boiler (stoker left)1)
195 195 225 315
W8 Distance to return connection (stoker left) 515 515 660 655
W9 Distance between stoker connection and back of
the boiler
470 470 470 470
B10 Distance between drainage connection and side of
boiler
125 125 125 120
B11 Distance to flow connection (stoker right) 125 125 130 130
B12 Distance to return connection (stoker right) 125 125 140 130
B13 Distance between rear flue gas pipe connection
and side of the boiler (stoker right)1)
485 485 600 -
H3 Height, flow connection 1305 1505 1545 1660
H4 Height, safety heat exchanger connection - 1620
H5 Height of rear flue gas pipe connection1) 960 1160 1205 1290
H6 Height, return connection with integrated return
feed boost
955 1155 1130 1210
H7 Height, drainage connection 210 210 200 200
H8 Height of stoker connection 620 620 620 620
1. Optional
NOTE:
▪ Flow and return connections are located on the stoker side
▪ Rear flue gas pipe connection (optional) on the side facing away from the stoker
(T4e 20-110) or on the left side of the boiler, respectively (T4e 130-180)
▪ Safety heat exchanger on the side facing away from the stoker (T4e 130-180)

Technical information | 4
M1980822_en | Installation instructions Wood chip boiler T4e 20-180 19
4.2 Components and connections
T4e 130-180:
Item Description 20 - 60 80-110 130-180
ATop flue gas pipe connection 149 mm 179 mm 199 mm
WBoiler flow 1 1/4“ 2“ 2“
CInduced draught fan -
DRear flue gas pipe connection (optional) 149 mm 179 mm 199 mm
EBoiler return 1 1/4“ 2“ 2“
FMixing valve for the return temperature
control
-
GPump for the return temperature control -
HLine regulating valve (optional) -
IAsh container 40 Litres 55 Litres 75 Litres
JDrainage 1/2” 1“ 1“
KSafety heat exchanger - - 1/2“

4 | Technical information
20 M1980822_en | Installation instructions Wood chip boiler T4e 20-180
4.3 Technical specifications
4.3.1 T4e 20 - 35
Description T4e 20 - 35
20 25 30 35
Nominal output kW 19.9 25.1 30 35
Electrical connection 400V / 50Hz / fused C16A
Weight of boiler (including stoker, without water) kg 740
Boiler capacity (water) l 117
Available feed height of pump 1) (with ΔT = 20K) mbar 575 503 461 414
Max. permitted operating temperature °C 90
Permitted operating pressure bar 4
Boiler class as per EN 303-5: 2012 5
Airborne sound level dB(A) <70
Permitted fuel as per EN ISO 17225 2) Part 4: Wood chips class A2 / P16S-P31S
Part 2: Wood pellets class A1 / D06
Test book number PB 121 PB 122 PB 123 PB 124
1. Pump output less water resistance in the boiler
2. Detailed information on the fuel can be found in the operating instructions in the section entitled “Permitted fuels”
Regulation (EU) 2015/1187 T4e 20 - 35
20 25 30 35
Energy efficiency class of boiler A+ A+ A+ A+
Energy efficiency index (EEI) of boiler 116 116 117 118
Heating space annual rate of use ηs % 79 79 80 80
Energy efficiency index (EEI) of boiler and controller combined 118 118 119 120
Energy efficiency class of boiler and controller combined A+ A+ A+ A+
Additional data for regulation (EU) 2015/1189
Description T4e 20 - 35
20 25 30 35
Heating up mode automatic
Condensing boiler No
Solid fuel boiler for combined heat and power No
Combined heating system No
Storage tank volume Ü "Storage tank" [}16]
Characteristics when operated exclusively with the preferred fuel
Useful heat delivered at rated heat output (Pn) kW 19.9 25.1 30.0 35.0
Useful heat delivered at 30% of rated heat output (Pp) 5.9 7.5 9.0 10.5
Fuel efficiency at rated heat output (ηn) % 83.9 83.5 83.8 84.2
Fuel efficiency at 30% of rated heat output (ηp) 82.9 83.2 83.4 83.6