Froling FHG 20 User manual

Froling GmbH, Industriestrasse 12, A-4710 Grieskirchen, Austria
www.froling.com
A French language manual may be
obtained from Tarm Biomass by
calling 800-782-9927 or by email
request to: in[email protected].
Installation Manual
Wood-Fired Central Heating Boiler
FHG
Read and follow the operating instructions and safety information! Subject to technical change!

Update Date: May 2014
Reprint date: Nov 2014

Introduction
Froling GmbH, Industriestrasse 12, A-4710 Grieskirchen, Austria Page 3
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Dear Installer,
The FRÖLING FHG is a state-of-the-art design that conforms to all
currently applicable standards and testing guidelines.
Please read and follow the assembly instructions. They contain safety
instructions and comprehensive information relating to transporting,
setting up and assembling the boiler.
The continuous development of our products means that there may be
minor differences between the illustrations and other content of the
document. If you discover any errors, please let us know.
We reserve the right make technical changes.
Installation Requirements
It is strongly recommended that the installer resist the temptation to
simply get started without reading this manual. Hours of time and
frustration can be prevented by a simple understanding of this product.
This manual has been written with much care and thought. We want the
first time installer to find installation as simple as for the experienced
installer. Time spent reading now will save more time in the long run.
The boiler must be installed with a thermal storage system capable of
absorbing the complete output of the boiler during periods when the
building is not calling for heat. A means for protecting the boiler against
cold return temperatures must also be provided.

Contents
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1 General information 7
1.1 Installation Hazards 7
1.2 Boiler Installation 8
1.2.1 Planning........................................................................................................... 8
Sizing the Boiler.............................................................................................. 8
Choosing an Installer ....................................................................................... 8
Locating the Boiler and Boiler Clearances ........................................................... 8
1.2.2 Approvals and reporting obligations..................................................................... 9
1.2.3 Requirements for initial filling and re-filling of heating system................................. 9
1.2.4 Ventilation of boiler room ..................................................................................10
1.2.5 Installing the heating system.............................................................................10
Minimum Return water temperature .................................................................11
Combination with Thermal Storage System .......................................................12
1.2.6 Chimney connection / Chimney system ...............................................................12
Basic boiler data for layout of Chimney system ..................................................14
2 Technical data 15
2.1 Components and connections 15
2.2 Dimensions 16
2.3 Specification data 17
3 Boiler Installation 18
3.1 Transport 18
3.1.1 Positioning ......................................................................................................18
3.1.2 Remove boiler from pallet .................................................................................18
3.1.3 Temporary storage ...........................................................................................18
3.2 Setting up in the boiler room 19
3.2.1 Moving the boiler in the boiler room ...................................................................19
3.2.2 Minimum distances in the boiler room.................................................................19
3.3 Package contents 20
3.4 Before installation 20
3.4.1 Fitting doors on the left.....................................................................................21
3.4.2 Fitting the door handles ....................................................................................22
3.5 Installing the FHG 23
3.5.1 Installing the flue gas pipe nozzle.......................................................................23
3.5.2 Install the pneumatic rods for the primary and secondary air.................................23
Right-hand actuators ......................................................................................23
Left-hand actuators ........................................................................................24
3.5.3 Installing the heat exchanger system..................................................................24
3.5.4 Final steps before insulating ..............................................................................25
3.5.5 Installing the insulating side panels ....................................................................25
Installing the cleaning port door and blank cover ...............................................28
Installing the insulating back panel...................................................................29
Installing the Actuators ...................................................................................29
3.5.6 Fitting the induced draught fan ..........................................................................30
Installing the insulating door and insulation cover ..............................................31
Installing the floor insulation ...........................................................................33

Contents
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Installing the cleaning lever for the heat-exchanger system ................................ 33
Installing the control unit ............................................................................... 34
Installing the flue gas sensor .......................................................................... 34
Installing the lambda probe ............................................................................ 35
Installing the rear insulation covers ................................................................. 35
3.6 System plumbing 36
3.6.1 Safety plumbing.............................................................................................. 36
3.7 Electrical connection 37
3.7.1 Core Module - Overview ................................................................................... 37
3.7.2 Connecting actuators ....................................................................................... 38
Primary and Secondary Air Damper Actuator .................................................... 38
Induced Draft Fan ......................................................................................... 38
3.7.3 Connecting sensors ......................................................................................... 39
Flue Gas Sensor ............................................................................................ 39
Lambda Probe............................................................................................... 39
Sensor of Door Switch.................................................................................... 40
Sensors for Thermal Storage System ............................................................... 40
Boiler sensor and Sensor of Safety Temperature Limiter..................................... 41
Connecting Main Supply and Pump 1 ............................................................... 42
Wiring diagram ............................................................................................. 43
Wiring diagram for overheat aquastat connections............................................. 43
4 First Start-up 44
4.1 General information 44
4.1.1 Before heating up for the first time.................................................................... 44
4.1.2 Preparing fire wood ......................................................................................... 44
4.1.3 Main Switch at Boiler Control System................................................................. 44
4.1.4 Error status of Boiler Control System ................................................................. 45
4.1.5 Starting the boiler for the first time ................................................................... 45
5 Boiler Control System Lambdatronic S 3200 46
5.1 Overview of the Basic Functions 46
5.1.1 Control keys and Display .................................................................................. 46
Navigation Keys ............................................................................................ 46
5.1.2 Status LED ..................................................................................................... 46
5.1.3 Function Keys ................................................................................................. 47
Info Key ....................................................................................................... 47
5.1.4 Graphical Display ............................................................................................ 49
Thermal Storage System loading status ........................................................... 49
5.1.5 Operating modes............................................................................................. 50
5.2 Initial start-up (programming the controller) 51
5.2.1 Changing the User Level................................................................................... 51
5.3 Setting parameters 52
5.4 Menu Overview 53
5.5 Menu - Storage tank 53
5.5.1 Status display of the Thermal Storage System .................................................... 53
5.6 Menu –Boiler 54
5.6.1 Status Displays for the Boiler ............................................................................ 54

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5.6.2 Temperature settings for the Boiler ....................................................................54
5.7 Menu –Manual 55
5.7.1 Digital Outputs.................................................................................................55
5.7.2 Analog Outputs ................................................................................................55
5.7.3 Digital Inputs...................................................................................................56
5.8 Menu - System 56
5.8.1 Adjustable Parameters ......................................................................................56
Adjustable Parameters - Boiler Temperature (visible for service purposes only)......56
Adjustable Parameters - Flue Gas.....................................................................57
Adjustable Parameters - Air settings .................................................................57
Adjustable Parameters - Lambda values............................................................58
Calibrating the Lambda Probe ..........................................................................58
Current system values ....................................................................................59
5.8.2 Basic Display ...................................................................................................59
5.8.3 Language settings ............................................................................................60
5.8.4 Time settings...................................................................................................60
5.8.5 Standard settings.............................................................................................60
5.8.6 System parameters ..........................................................................................61
Boiler type –Do not change! ...........................................................................61
System selection ............................................................................................62
Hydraulic system............................................................................................62

General information
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1General information
It is unlawful to carry out modifications to the boiler or to change or
deactivate safety equipment.
In addition to the operating instructions and the applicable national and
local codes and regulations for installation and operation of the boiler
system, all fire, police, and electrical regulations must be observed.
1.1 Installation Hazards
Install, modify and use only in accordance with manufacturer’s manuals.
Refer to authorities having jurisdiction for proper installation. Contact
local building and fire officials about restrictions and installation
inspection in your area. If there are no applicable local codes, follow
ANSI/NFPA 211 and CAN/CSA B365. Special precautions are required
for passing the Chimney through a combustible wall or ceiling.
Inspect and clean exhaust system, Fuel Loading Chamber, Combustion
Chamber, Ash-Pits, and Heat Exchanger frequently in accordance with
owner’s manual.
DANGER!
Working on electrical components may cause severe injuries from electric
shocks!
WARNING!
The electrical system of the boiler shall be supplied from a double 115 V 60
Hz (nominal 230 V AC) 15 amp branch circuit including neutral and ground
connection. For wiring instructions please refer to Section 3.7 in this
Installation Manual!
Chimney must be 6’’ (150 mm) diameter listed UL-103 HT or ULC-S629
residential all-fuel type or tile-lined masonry. Flue connector pipe must be
6’’ (150 mm) diameter made of a minimum 24 MSG black steel.
Inadequate design, installation and maintenance of the flue gas system will
lead to insufficient chimney draft and could result in Danger of Life or
Severe Injury caused by serious faults in combustion, e.g. explosively
combustion of wood gases and flash fires!
This boiler requires fresh air for safe operation and must be installed so
there are provision for adequate combustion and ventilation air!
CAUTION!
Do not connect this unit to a Chimney flue serving another appliance!
Flooring must be a minimum 3/8’’ (10 mm) non-combustible material
covering the installation clearance area! The floor must be level and
reinforced if required. For construction of the floor beneath the boiler please
pay attention to weight of boiler, water content and wood fuel according to
the Installation Manual!
This boiler is not for use with an automatic stoker
Connect to an existing boiler system in combination with heat storage only!
Use original spare parts only. Installation of non-licensed replacement parts
will void the warranty!

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1.2 Boiler Installation
This section describes the steps to installing and starting-up the boiler.
This section is directed at the installer.
1.2.1 Planning
Sizing the Boiler
It is critical to size the boiler properly. A proper up to date heat load
calculation is advised. An accurate history of building fuel usage over
several years can help to calculate the proper size boiler. Boiler sizing is
the responsibility of the installer. Tarm Biomass bears no responsibility
for boiler sizing, but can provide sizing input.
Choosing an Installer
Choosing a competent, licensed installer is critical to the successful
installation of the boiler. The installer is responsible for all planning,
installation, start-up, troubleshooting, owner training, and annual
maintenance for the boiler. Some aspects of the system piping, start-up,
and operation may differ from normal practice in fossil fuel boiler
installation. To be successful, the installer must study this manual,
follow conceptual drawings and instructions provided, understand the
installation tasks, and contact Tarm Biomass for help when necessary.
Tarm Biomass will provide phone assistance at no additional cost to the
original boiler owner to assure success in the installation.
Locating the Boiler and Boiler Clearances
The boiler must be installed with the minimum installation clearances to
combustible materials outlined on the next page. Clearances may only
be reduced by means approved by the regulatory authorities.
The boiler is not suitable for outdoor installation. It must be located
in a weather-tight, protected space.
The boiler must be placed on a level, non-combustible floor, such as
a concrete slab on earth.
If the boiler is placed near inhabited rooms, so that flue gas can
easily penetrate into these rooms, a carbon monoxide alarm must
be installed that can give a warning regarding possible escapes of
carbon monoxide into the inhabited rooms.
DO NOT INSTALL THIS BOILER IN A MOBILE HOME. There is no safe
way this boiler can be installed inside a mobile home.
The boiler must be installed with the minimum installation clearances to
combustible materials outlined below. Clearances may only be reduced
by means approved by the regulatory authorities.
Minimum installation clearances see chapter 3.2.2

General information
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1.2.2 Approvals and reporting obligations
IMPORTANT: Install, modify and use only in accordance with
manufacturer’s installation & operation manuals. Refer to authorities
having jurisdiction for proper installation. Contact local building and
fire officials about restrictions and installation inspection in your
area. If there are no applicable local codes, follow ANSI/NFPA 211
and CAN/CSA B365. Special precautions are required for passing the
Chimney through a combustible wall or ceiling.
Inspect and clean exhaust system frequently in accordance with
Owner’s Manual.
1.2.3 Requirements for initial filling and re-filling of heating system
Water quality conditions for initial filling the heating system:
For first filling of heating system water must be clean, pure or purified,
odorless and without suspended matter.
Water hardness must not exceed 580 grain/fl.oz. or 300 ppm CaCO3;
(300 mg/l), meaning medium hard to soft water.
Concentration of chlorides must not exceed 58 grain/fl.oz. (30 mg/l).
Boiler system water pH should be 8.0-8.6.
If water quality is poor, water treatment additives should be considered.
For re-filling of small amounts, water shall be clean at least.
For swimming pools or spas do not use heating water directly. Proper
sized heat exchangers are required! Boiler water is not potable!
IMPORTANT: For initial filling and re-filling bleed the filling hose
before connecting to the heating system to prevent excess air from
being introduced to the system.
Use of a suitable antifreeze mix is allowed, but will cause a loss in heat
transfer efficiency.

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1.2.4 Ventilation of boiler room
During the installation of your boiler provision must be made by the
installer to provide a source of combustion air for the boiler.
Maintaining this combustion air source is critical for proper operation of
your boiler, do not close off, block or otherwise obstruct the combustion
air source for your boiler. If you have questions regarding the
combustion air source please contact your installer.
Provision for outside combustion air may be necessary to ensure that
fuel-burning appliances do not discharge products of combustion into
the house. Guidelines to determine the need for additional combustion
air may not be adequate for every situation. If in doubt, it is advisable
to provide additional air. The Froling FHG, due to its powerful Induced
Draft Fan, needs adequate air to make up for the air being pushed up
the Chimney, especially during start up before the Chimney is warm.
The openings for the combustion air and the exhaust air should be
arranged as nearly opposite each other to achieve a good thermal draft
effect.
The combustion air must be drawn in directly from outside. The
exhaust air must be discharged directly to outside.
Both openings for air intake and exhaust air shall be well protected from
any interference caused by environment, as weather, snow, greenery,
small animals, etc.
Froling FHG boilers are not suitable for direct connection to outside air.
Outside air should be ducted to no closer than 12” (30 cm) from the
boiler. A 6” (150 mm) duct should be large enough for all sizes unless
the duct run is over 25 feet (7.6 m).
In addition to local codes and regulations a minimum cross section of
combustion air and exhaust air shall be 28 sq.in. (180 cm²) each.
Account for the reduced cross section area if gratings or fins are used!
IMPORTANT: Canada must conform to ANSI/NFPA outside air
requirements of 1 sq. inch per 1,000 Btu/hr.
1.2.5 Installing the heating system
The entire heating system has to be designed according relevant
national and local codes. The nominal power of the Central Heating
Boiler shall be corresponding to the calculated heat demand for all
heating appliances connected to the heating system both in summer and
winter time.
The heating system must be able to carry all heat produced by the
Central Heating Boiler and additional heat source, if applicable. The
whole heating system as well as all heating zones have to be
hydraulically balanced.
Special arrangements have to be provided for initial filling or re-filling
and bleeding of all heating zones. Flow-check valves and zone-valves
have to be installed for proper adjustment of water flow rates. All piping
must be water and air tight and insulated safely.
For the heating system piping, it is possible to use either copper or iron
piping materials. The supply and return water pipe should be insulated
to avoid heat loss. Included in chapter "3.6 System plumbing" are
conceptual piping diagrams showing the correct layout for a variety of
situations. Tarm Biomass can provide additional conceptual plumbing
diagrams.

General information
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IMPORTANT:
Any plastic or rubber tubing used with a Tarm Biomass boiler must have
an oxygen barrier, or boiler corrosion will occur. If radiant tubing
without an oxygen barrier is installed, water in the tubing part of the
heating system must be separated from the boiler. Separation of system
components is typically done by using a heat exchanger. Use of radiant
tubing without an oxygen barrier will void the boiler warranty.
All safety devices have to be installed in accordance with relevant
national and local codes and regulations and have to ensure that the
maximum water temperature and the maximum system pressure are
not exceeded. These conditions refer to pressurized heating systems.
Related safety devices to be installed are Pressure Relief Valves, a
closed and pressurized expansion tank and a proper gravity circuit at
least. In addition the Central Heating Boiler is equipped with an
Overheat Thermostat.
A circulator (Size and brand to be determined by the installer (not
provided)) should be installed as C3 per drawings suggested by Tarm
Biomass.
An aquastat (Honeywell L4008B (provided)) must be installed to protect
the boiler from overtemperature conditions by energizing a chosen
heating zone.
A tankless hot water coil is not available for the Froling FHG boiler.
Tarm Biomass recommends the use of the BLTCONTROL (available
through Tarm Biomass) when burning the wood boiler in conjunction
with a back up boiler. The BLTCONTROL is a three position control that
allows switching between wood only, wood with automatic back up, or
back up only, by controlling the operation of the back up auxiliary boiler.
BLTCONTROL takes input from a zone relay control and determines,
based on thermal storage system temperature, or second stage
thermostat reading, whether to pull heat from the thermal storage
system or the back up auxiliary boiler. The BLTCONTROL easily
integrates the wood boiler and thermal storage system with an existing
fossil fuel heating system.
A permanent pressurized domestic water supply must be provided with
proper automatic filling and pressure reduction valves.
• The boiler is not suitable for outdoor installation. It must be located in
a weather-tight, protected space.
If there is a risk of freezing for parts of the heating system all water
within these heating zones has to be frost-proof!
Minimum Return water temperature
If the return water temperature is below the minimum, a part of the
heated water output flow shall be mixed in.
A thermostatic mixing valve, set to open at 142°F (61°C), is required to
temper return water to prevent cold return water from reaching the
boiler. This valve helps prevent boiler corrosion. Tarm Biomass can
provide this valve or a loading unit, at an additional cost.
Installing the boiler without proper unit providing a minimum return
water temperature (e.g. Termovar loading valve or loading unit) can
cause condensation water and fuel residue combine to form an
aggressive condensate, leading to damage to the boiler!
Minimum return water temperature is 142°F (61°C)

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Combination with Thermal Storage System
The Froling FHG boiler is required to be installed with a Thermal Storage
System, this system may require periodic maintenance. Please review
the periodic maintenance requirements of the thermal storage system
with the owner / system operator.
The Froling FHG boiler must be installed with a thermal storage system
capable of absorbing the complete output of the boiler during periods
when the building is not calling for heat. A means for protecting the
boiler against cold return water temperatures must also be provided.
Further information on acceptable ways of meeting these warranty
requirements is provided in the owner's manual.
The manual and supporting documentation must be retained by the
owner/ system operator for reference and future use.
The installer is responsible for familiarizing the owner/ system operator
with all aspects of boiler operations, safety procedures, monitoring and
cleaning requirements, shut down procedures, and annual maintenance
requirements.
1.2.6 Chimney connection / Chimney system
The Chimney is one of the most critical factors in the successful
operation of any solid fuel heater, including the Froling FHG boiler. A
good Chimney will provide a continuous and dependable draft to pull the
exhaust gasses out of the building.
NOTICE:
The boiler must be connected to a 6’’ (150 mm) diameter Factory-Built
Type UL 103 HT (ULC S629 in Canada) approved Chimney or to a tile-
lined masonry Chimney. The Chimney must be in good condition. If the
boiler is connected to a dirty or inadequate Chimney, it can present a
serious fire hazard.
All Chimneys and connections must conform to NFPA standard #211. No
other appliance should be connected to this flue unless allowed by the
local code authority. Consult your local inspector for Chimney
requirements and install the boiler in accordance with all applicable
codes. Please review the following diagram before connecting the boiler
to the Chimney.
The entire flue gas system is to be designed to prevent possible soot-up,
insufficient draft, and condensation.
Chimney must be 6’’ (150 mm) diameter listed UL-103 HT or ULC-S629
residential all-fuel type or tile-lined masonry. Flue Gas Pipe connection
to the chimney must be 6’’ (150 mm) diameter made of a minimum 24
MSG black steel.
Follow manufacturer’s installation instructions for installing and
supporting any specific Chimney product.
Flue gas exhaust temperatures can be low enough to cause
condensation in Chimneys. Condensation will, over time, damage a
masonry Chimney. Accordingly, installation of a stainless steel Chimney
liner (made with 316 or AL-294C alloys) inside the Chimney flue is
strongly recommended.

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At the connection to a factory-built Chimney, a dripless adaptor must be
used.
The Chimney draft must be stable and between 0.03” (0.8 mm) water
column (8 Pa) and 0.10” (2.5 mm) water column (25 Pa).
If the draft exceeds these amounts, a barometric draft regulator must
be installed.
The top of Chimney must be 3 feet (0.9 m) above roof and 2 feet (0.6
m) above any portion of the roof within 10 feet (3.0 m) measured
horizontally.
For the Froling FHG 20, 30, 40 and 50 best draft will be provided by a
Chimney which has an 6” ID round flue, is 20-30 feet (6 –9 m) in
height and which is located inside the heated structure. The Chimney
must be capable of maintaining a breech draft of 0.03” (0.8 mm) water
column (8 Pa) during normal boiler operation.
Your Froling FHG gasification boiler is designed to burn efficiently and
with virtually clear emissions, but under certain conditions creosote
deposits can form in your Chimney. Chimneys that are too large, are
poorly insulated, or have bends in the flue passages are especially prone
to problems with draft and/or creosote.
Refueling with overly large loads of fuel can cause overheating, which
leads to “Slumber" mode showing on the Boiler Control System.
Condensation and creosote may increase caused by low flue gas
temperature and flow.
Typical flue gas temperatures (at cleaned heat-exchanger) as well as
additional flue gas values can be found in table “Basic boiler data for
layout of Chimney system” below.
The Flue Gas Pipe connecting the Boiler to the Chimney flue must be
black or stainless, have a minimum thickness of 24 gauge, and rise a
minimum of ¼” per foot of run toward the Chimney (Fig 3.1). Flue Gas
Pipe sections must be attached to one another with a minimum of three
sheet metal screws and sealed with high-temp silicone. The Flue Gas
Pipe should not contain more than two 90º elbows (45º elbows are
preferred over 90º elbows).
The Flue Gas Pipe shall be insulated.
The entire flue gas system - the Chimney, the Flue Gas Pipe and
connection pieces –must fulfill at least following conditions:
•Minimum draft at Flue Gas Pipe
•Minimum temperature at Chimney thimble, if Chimney system is
non-condensing (not moisture / condensation proof) both at rated
and partial load.
MASONRY CHIMNEYS: Masonry Chimneys must be lined, either with
code-approved masonry or pre-cast refractory tiles, stainless steel pipe,
or poured in place liner. Do not use an unlined Chimney.
FACTORY BUILT CHIMNEYS: Factory built Chimneys must be tested and
listed for use with solid fuel burning appliances to the High Temperature
(HT) Standard (2100°F(1150°C )), UL 103, for the United States and
High Temperature (650°C) Standard ULCS-629 for Canada. Factory-Built
Chimneys must be installed as per the manufacturer’s instructions.
Strong winds blowing across the top of a Chimney or a Chimney which
has a particularly strong natural draft can cause the Froling FHG boiler
to continue heating when the Induced Draft Fan is off. This is an unlikely
scenario, as the blower on a Froling FHG, used with a thermal storage

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system, should rarely be off while a fire is present. If however, an
irregular or excessively high draft presents problems, the solution is the
use of a barometric draft regulator.
Installation requirements for a barometric damper (draft regulator).
- The diameter of the draft regulator must be equal or greater than
that of the Chimney connector.
- The draft regulator should be installed as close as possible to the
boiler, on the Chimney connection or on Chimney itself.
- The draft regulator adjustment should be made with a vacuum
gauge, if possible, with the boiler operating at full output. If the
start-up is made in warm weather, a readjustment may be necessary
in cold weather.
- If, at the maximum adjustment (maximum opening of the shutter of
the draft stabilizer), the draft is always higher than 0.10” (2.5 mm)
water column (25 Pa), a second draft regulator may be required.
- Recommended draft regulator location is shown (position 1).
The installation of a draft regulator as well as a blowback flap is strongly
recommended!
Nevertheless applicable federal and local codes have to be fulfilled!
Avoid 90 degree angled connections to the boiler flue collar. If the
chimney connection is mostly horizontal a cleanout tee is recommended
for ash removal
Basic boiler data for layout of Chimney system
FHG
Quantity
Unit
20
30
40
50
Flue gas temperature
°C
150 / 100
170 / 110
150 / 100
170 / 110
Rated / partial load
°F
300 / 200
340 / 230
300 / 200
340 / 230
Flue gas mass flow
kg / h
50 / 29
76 / 43
97 / 54
122 / 65
Rated / partial load
lb / h
111 / 64
167 / 95
214 / 119
270 / 143
Minimum draft at
Pa
8
8
8
8
Boilers flue gas connection
inches
water column
0.03
0.03
0.03
0.03
Maximum draft at
Pa
25
25
25
25
Boilers flue gas connection
inches
water column
0.10
0.10
0.10
0.10
Flue gas connector
mm
150
150
150
150
Inches
6
6
6
6
1

Technical data
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2Technical data
2.1 Components and connections
Item
Description
Unit
Value
1
Boiler supply connection
inches
1.50
2
Boiler return connection
1.50
3
Connection for filling/drainage cock
0.50
4
2 x safety heat-exchanger connection sleeves for thermal
discharge safety device (Not used in North America)
0.50
5
Flue gas sensor connector
0.50
6
Lambda probe connector
0.75
7
Immersion sleeve for boiler sensor and sensor for safety
temperature limiter
0.50
8
Connection sleeve for thermal discharge safety device sensor
0.50
9
Flue gas connector
6.00
2
1
3
4
5
6
7
8

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2.2 Dimensions
Item
Description
Unit
20/30
40/50
H
Total Height of Boiler
inches
56
60
H1
Total Height of Boiler including the Controller
61.75
65.75
H2
Height of Flue Gas Pipe Connection
60.25
64
H3
Height of Supply Feed Connection
50.25
54
H4
Height of Return Feed Connection
5
5
H5
Height of Drain
4.75
4.75
H18
Height of Safety Battery Connection
35
35
B
Total Width of Boiler
inches
22.75
26.75
B1
Total Width of Boiler including the Cleaning Lever
27.50
31.50
L
Total Length of Boiler
inches
45.50
50.25
L1
Total Length of Boiler including the Induced Draft Fan
52.50
56.50

Technical data
Froling GmbH, Industriestrasse 12, A-4710 Grieskirchen, Austria Page 17
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2
2.3 Specification data
Description
Unit
20
30
40
50
Rated Heat Output
Btu/Hr
70,000
102,500
136,560
170,700
Heating Efficiency Range
35,000
-
70,000
51,250
-
102,500
68,280
-
136,560
85,350
-
170,700
Electrical Connection
V/Hz
240 / 60
240 / 60
240 / 60
240 / 60
Electrical Consumption
W
120
180
180
180
Output Temperature Range
°F
158 - 194
158 - 194
158 - 194
158 - 194
Boiler Weight
Pounds
1150
1150
1345
1345
Fuel Loading Chamber Door
inches
13 x 14.50
13 x 14.50
13 x 14.50
13 x 14.50
Fuel Loading Chamber Capacity
Cu Ft
5
5
7.4
7.4
Wood Length
inches
21
21
21
21
Water Contents
Gallons
32
32
50
50
Upstream Resistance
Psi
0.042
0.094
0.157
0.245
Minimum Return Feed Temperature
°F
131
131
131
131
Maximum Operating Temperature
°F
203
203
203
203
Maximum Operating Pressure
Psi
43.5
43.5
43.5
43.5
Permitted Fuel
Firewood
Firewood/
Coarse
Waste-Wood
Firewood/
Coarse
Waste-Wood
Firewood/
Coarse
Waste-Wood
Boiler Test Pressure
Psi
65
65
65
65
Flue Gas Temperature
Rated Load
Partial Load
°F
303
203
329
212
311
214
253
223
Minimum Draft Required
Rated Load
Partial Load
Inch WC
-0.060
-0.028
-0.060
-0.040
-0.072
-0.040
-0.072
-0.040

Boiler Installation
Boiler assembly
Page 18
M1060008_US v
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3Boiler Installation
3.1 Transport
The boiler comes packed on a pallet.
Move the boiler without jarring or jolting
Follow the instructions on the packaging
when moving the boiler
3.1.1 Positioning
Use a fork-lift or similar lifting device to move the pallet and position
the boiler or
Attach a cable winch or similar lifting device to the eyelet on the
boiler and position the boiler
3.1.2 Remove boiler from pallet
At the front of the boiler:
Remove securing devices used during transportation on the left and
right side of the base.
At the back of the boiler:
Remove securing devices used during transportation on the left and
right side of the base.
3.1.3 Temporary storage
If the system is to be installed at a later date:
Store the boiler, insulation and control unit in a safe, dust-free, and
dry location
Moisture and frost reduce the effectiveness of insulation and can
destroy electronic components.

Boiler Installation
Boiler Assembly
Froling GmbH, Industriestrasse 12, A-4710 Grieskirchen, Austria Page 19
www.froling.com M1060008_US
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3.2 Setting up in the boiler room
3.2.1 Moving the boiler in the boiler room
Position a fork-lift or similar lifting device at the base frame of the
boiler and move it to the designated position
To prevent damage:
Move the boiler without jarring or jolting
Risk of damage to firebrick-lined combustion chamber.
Move the packing materials carefully
Risk of scratching the insulation
Position the boiler at the designated location
The boiler must be positioned so that it is rise slightly towards the
supply fitting
Observe the minimum distances from other objects in the boiler
room
3.2.2 Minimum distances in the boiler room
Always set up the boiler in accordance with all applicable standards and
regulations. The following minimum distances must be observed in all
cases:
A
Front of Appliance to Combustibles
inches
36
B
Side Wall to Appliance
inches
9
C
Back Wall to Appliance
inches
14
D
Ceiling to Appliance
inches
18
E
Combustibles to Flue Pipe
inches
18

Boiler Installation
Boiler assembly
Page 20
M1060008_US v
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3.3 Package contents
A
Boiler
B
Insulation
C
Heat-exchanger system
(optional)
D
Flue gas pipe nozzle
E
Ceramic fiber seal
F
Induced draught fan
G
Cardboard box containing
small parts
H
Rods for primary and
secondary air
I
Ash shovel
J
Cleaning kit
K
Cleaning brush, small
L
Cleaning brush, large
The following are also included in the package contents but not pictured:
Lambdatronic control unit, pressure relief valve, pressure/temperature
gauge, Honeywell overheat aquastat, installation instructions, operating
instructions, guarantee certificate, identification plate
3.4 Before installation
IMPORTANT: The boiler doors are attached on the right hand side
when delivered. Carry out the following assembly steps if the doors
need to be attached on the left:
A
B
L
D
K
E
F
G
H
J
I
C