Potterton EC three 125 User manual

Working towards
a cleaner future
Eurocondense three
Installation operation and maintenance manual
To be kept by the user July 2013
heating specialists
Floor Standing Condensing Gas Boilers
125 to 300kW

Table of contents
1. Regarding this Manual......................................................................................................................... 5
1.1 Content of this manual............................................................................................................. 5
1.2 Overview table......................................................................................................................... 5
1.3 Used symbols........................................................................................................................... 6
1.4 For whom is this manual intended?............................................................................................ 6
2. Safety................................................................................................................................................ 7
2.1 Uso appropriato....................................................................................................................... 7
2.2 General safety instructions........................................................................................................ 7
2.3 Regulations and standards........................................................................................................ 8
2.4 Liquid gas under ground............................................................................................................ 8
2.5 CE-Marking.............................................................................................................................. 8
2.6 Conformity declaration............................................................................................................. 9
3. Technical Data.................................................................................................................................... 10
3.1 Dimensions and connections..................................................................................................... 10
3.2 Technical Data......................................................................................................................... 11
3.3 Hydraulic resistance................................................................................................................. 13
3.4 Wiring Diagram........................................................................................................................ 14
3.5 Sensor value tables................................................................................................................... 15
4. Before installation............................................................................................................................... 16
4.1 Converting the exhaust and supply air connection....................................................................... 16
4.1.1 Converting the exhaust connection.............................................................................. 16
4.1.2 Converting the supply air connection........................................................................... 16
4.2 Corrosion protection................................................................................................................. 18
4.3 Requirements for heating circuit water...................................................................................... 18
4.3.1 Further information on the heating water.................................................................... 19
4.3.2 Diagramm Wasserhärte.............................................................................................. 19
4.4 Notes for installation location................................................................................................... 21
4.5 Space requirement................................................................................................................... 22
4.6 Transportation......................................................................................................................... 23
4.7 Application examples............................................................................................................... 24
4.8 Legend.................................................................................................................................... 33
5. Installation......................................................................................................................................... 34
5.1 Connect heating circuit............................................................................................................. 34
5.2 Condensate water connection................................................................................................... 34
5.3 Sealing and filling of the plant................................................................................................... 34
5.4 Flue system.............................................................................................................................. 34
5.5 Gas connection........................................................................................................................ 35
5.6 Check tightness........................................................................................................................ 35
5.6.1 Purging the gas line.................................................................................................... 35
5.7 Factory settings........................................................................................................................ 35
5.8 CO2 -Content........................................................................................................................... 36
5.9 Changing over from LPG to natural gas and vice versa.................................................................. 36
5.10 Controller Stop Mode (Manual Adjustment of Burner Load).......................................................... 37
5.11 Check and adjust CO2 content................................................................................................... 38
5.12 Electrical connection (general)................................................................................................... 39
5.12.1 Cable lengths............................................................................................................. 39
5.12.2 Strain reliefs.............................................................................................................. 39
5.12.3 Circulating pumps...................................................................................................... 39
5.12.4 Fuses......................................................................................................................... 40
5.12.5 Connection sensor / components................................................................................. 40
5.12.6 Replacing cables......................................................................................................... 40
2 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

5.12.7 Protection against contact........................................................................................... 40
6. Commissioning................................................................................................................................... 41
6.1 Menu-Commissioning.............................................................................................................. 41
6.2 Check water pressure................................................................................................................ 41
6.3 Switching-on........................................................................................................................... 41
6.4 Temperatures for heating and drinking water............................................................................. 42
6.5 Individual time programme....................................................................................................... 42
6.6 Instruction for the customer...................................................................................................... 42
7. Operation........................................................................................................................................... 44
7.1 Operating elements.................................................................................................................. 44
7.2 Display.................................................................................................................................... 45
7.3 Setting up heating operation..................................................................................................... 45
7.4 Stop drinking water operation................................................................................................... 46
7.5 Setting room setpoint............................................................................................................... 46
7.6 Display information.................................................................................................................. 47
7.7 Error message.......................................................................................................................... 47
7.8 Servicing message.................................................................................................................... 48
7.9 Emergency mode (Manual control)............................................................................................. 48
7.10 Restoring factory setting........................................................................................................... 48
8. Programming...................................................................................................................................... 49
8.1 Programming procedure........................................................................................................... 49
8.2 Modification of parameters....................................................................................................... 50
8.3 Setting table............................................................................................................................ 52
8.4 Explanations for setting table.................................................................................................... 78
8.4.1 Time and date............................................................................................................ 78
8.4.2 Operator section........................................................................................................ 78
8.4.3 Radio......................................................................................................................... 80
8.4.4 Time programs........................................................................................................... 80
8.4.5 Holiday programs....................................................................................................... 81
8.4.6 Heating circuits.......................................................................................................... 81
8.4.7 DHW......................................................................................................................... 90
8.4.8 Consumer circuit and swimming pool circuit................................................................. 92
8.4.9 Swimming pool.......................................................................................................... 92
8.4.10 Primary contr/system pump........................................................................................ 93
8.4.11 Boiler........................................................................................................................ 93
8.4.12 Cascade..................................................................................................................... 97
8.4.13 Solar......................................................................................................................... 98
8.4.14 Solid fuel boiler.......................................................................................................... 101
8.4.15 Buffer storage............................................................................................................ 102
8.4.16 DHW-storage............................................................................................................. 104
8.4.17 Configuration............................................................................................................ 108
8.4.18 LPB-system................................................................................................................ 117
8.4.19 Fault......................................................................................................................... 118
8.4.20 Service / special operation........................................................................................... 119
8.4.21 Input/output test....................................................................................................... 120
8.4.22 State......................................................................................................................... 120
8.4.23 Diagnostics cascade/heat generation/consumers.......................................................... 126
8.4.24 Burner control............................................................................................................ 127
8.4.25 Info Option................................................................................................................ 127
9. Maintenance...................................................................................................................................... 128
9.1 Inspection and need dependent service...................................................................................... 128
9.2 Boiler view............................................................................................................................... 129
9.3 Disassembling and installing burner.......................................................................................... 130
9.4 Check combustion room insulation............................................................................................ 133
9.5 Installing the combustion room insulation.................................................................................. 133
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9.6 Check and replacing Ignition electrode....................................................................................... 134
9.7 Check and replacing ionisation electrode.................................................................................... 135
9.8 Electrode spacing and installation locations................................................................................ 136
9.9 Clean burner pipe..................................................................................................................... 136
9.10 Clean heat exchanger............................................................................................................... 137
9.11 Clean fan................................................................................................................................. 139
9.12 Fault switch-off........................................................................................................................ 140
9.13 Fault code table........................................................................................................................ 141
9.14 Maintenance code table............................................................................................................ 144
9.15 Operating phases of the Control Centre LMS............................................................................... 144
4 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

1. Regarding this Manual
Read this instruction thoroughly before operating the device!
These instructions are from the original German document.
1.1 Content of this manual
This manual contains the instructions for the installation of the boilers EuroCon-
dense three for standard application with 1 pumped heating circuit and 1 DHW
storage tank.
Further applications can be made available (mixing heating circuit, solar connec-
tion, etc.) by installing extension modules (clip-ins).
Below is an overview of the further documents relatingto this heating system.
Keep all documents relating to the boiler on site!
1.2 Overview table
Documentation Contents Intended for
Technical information - Planning documents
- Description of function
- Technical data/circuit diagrams
- Basic equipment and accessories
- Application examples
- Call-for-tender texts
Planner, Heating spe-
cialist
Installation Handbook - Usage according to purpose
- Technical data/circuit diagram
- Regulations, standards, CE
- Notes for installation location
- Application example Standard application
- Commissioning, operation and programming
- Maintenance
Heating specialist
Operating Instructions - Commissioning
- Operation
- User settings/programming
- Disturbance table
- Cleaning/maintenance
- Energy saving tips
Customer
Programming and
Hydraulic system manual
- Setting table including all parameters and explanations
- further application examples
Heating specialist
Online database - Anwendungsbeispiele für registrierte Benutzer auf der
Internetseite www.broetje.de
Planner,
Heating specialist
Asset ledger - Commissioning report
- Check list for commissioning
- Maintenance
Heating specialist
Brief instruction - Operation in brief Customer
Servicing booklet - Report of carried out services Heating specialist
Accessories - Installation
- Operation
Heating specialist,
customer
Regarding this Manual
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 5

1.3 Used symbols
Danger! Danger exists for body and life in case it is not observed.
Danger of electric shock! In case it is not observed, danger from electricity exists
for body and life!
Caution! If warning is not observed, danger exists for environment and the device.
Note/tip: Here, you can find background information and useful tips.
Reference to additional information in other documents.
1.4 For whom is this manual
intended?
This installation manual is intended for the heating specialist.
Regarding this Manual
6 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

2. Safety
Danger! Observe the following safety information! Otherwise you are endangering
yourself and others.
2.1 Uso appropriato
Le caldaie condensazione a gas della serie EuroCondense three sono generatori di
calore in impianti di riscaldamento ad acqua sanitaria secondo DIN EN 12828.
Soddisfano le norme DIN EN 676, DIN 4702 parte 6 e DIN EN 677, tipo installazione
B23, C33, C53, C63x e C83.
Per i tipi installazione C33, C53, C63x e C83 osservare le istruzioni del set di accessori.
Paese di destinazione ITA: Categoria II2H3+
2.2 General safety instructions
Danger! Danger to life!
A danger of signifficant damages to persons, environment and property exists dur-
ing installation of heating systems. Therefore, heating systems must only be in-
stalled by specialist companies and commissioned by specialists of the installing
company!
Danger of electric shock! Danger to life due to live components!
All electrical work in connection with the installation must only be carried out by a
trained electrician!
Danger! Danger to life if heating unit used improperly!
- This device is not intended to be used by persons (including children) with limi-
ted physical, sensory or mental abilitites or lack of experience and/or lack of
knowledge, only if they are supervised by a person responsible for their safety or
receive instructions on how to use the device.
- Children must be supervised to ensure that they do not play with the device.
Danger! Danger to life through modifications to the device!
Unauthorised conversions and modifications of the device are not permitted, as
this can endanger persons and lead to damage to the device. In case of not observ-
ing this, the approval of the device becomes void.
Setting, maintenance and cleaning of the device must only be carried out by a
qualified gas heating specialist!
Used accessories must comply with the technical rules and have been approved in
connection with the device by the manufacturer.
Caution! Only original spare parts must be used.
Safety
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 7

2.3 Regulations and standards
Beside the general technical rules, the relevant standards, regulations, ordinances
and guidelines should be followed:
- DIN 4109; Noise protection in construction engineering
- DIN EN 12828; Heating plants in buildings
- EnEV - Energy saving regulation
- Federal Immission Control Ordinance 3. BImSchV
- DVGW-TRGI 1986 (DVGW-worksheet G 600); Technical Rules for gas installation
- TRF; Technical Rules LPG
- DVGW-Data sheet G 613 Gas appliances- Installation, maintenance and operat-
ing instructions
- DIN 18380; Heating plants and central hot water plants (VOB)
- DIN EN 12831; Heating plants in buildings
- DIN 4753; Hot water plants for drinking and water supply
- DIN 1988; Technical Rules for drinking water installations (TRWI)
- VDE 0700-102, DIN EN 60335-2-102: Safety of electrical appliances for house-
hold use and similar purposes: Special requirements for gas-, oil- und solid fuel
appliances with electrical connections
- Fuel Ordinance, State Ordinances
- Regulations of the local Electricity Board
- Obligation to register (possibly. Group Exemption Regulation )
- ATV-Code-of-practrice M251 of the waste water technology association
- Regulations of the Public Authorities for the run-off of condensate.
2.4 Liquid gas under ground
The EuroCondense three complies with DIN EN 126 and DIN EN 298 and, therefore
does not need an additional shut-off valve for operation with liquid gas under
ground
2.5 CE-Marking
The CE-marking means that the gas-fired fuel value devices meet the require-
ments of the gas devices guideline 2009/142/EG, the low voltage guideline
2006/95/EG, as well as, the guideline 2004/108/EG (electro-magnetic compatibili-
ty, EMV) of the Commission to balance the legal regulations of the member states.
Meeting the protection requirements according to guideline 2004/108/EG is only
guaranteed by operation of the boiler according to purpose.
The ambient conditions according EN 55014 must be met.
Operation is only allowed with correctly fitted casing.
Correct electrical earthing has to be ensured by regular check (e.g. annual inspec-
tion).
When replacing device parts, only original parts as specified by the manufacturer
must be used.
The gas condensing-boilers fulfill the basic requirements of the Efficiency Guide-
line 92/42/EG as condensing boiler.
When natural gas is used, the gas condensing-boiler emit less than 60 mg/kWh NOX
corresponding to the requirements as per §6 of the Ordinance regarding small fir-
ing places dated 26.01.2010 (1. BImSchV).
Safety
8 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

2.6 Conformity declaration
EC
Safety
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 9

3. Technical Data
3.1 Dimensions and connections
Fig. 1: Dimensions and connections
Safety group
connection
692
1389
C
B
A
FE
G
Heating
flow
Gas
320
320280
Supply air
H
I
96 122
Flange DN 65
Flange DN 65
Heating
return
D
K
N
L
O
M
Supply air (optional)
Flue gas (optional)
60
61 Condensate (optional)
65
336
Condensate
20-40
1458
Technical Data
10 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

Tab. 1: Dimensions
Model Description EC three
125
EC three
170
EC three
215
EC three
260
EC three
300
Dimension A Gas Connection R 1" R 1½" R 1½" R 1½" R 1½"
Dimension B Safety Group Connection R 1" R 1" R 1¼" R 1¼" R 1¼"
Dimension C Flue 160 mm 160 mm 200 mm 200 mm 200 mm
Dimension D Depth 1008 mm 1008 mm 1171 mm 1264 mm 1357 mm
Dimension E Centre of Return 301 mm 301 mm 351 mm 351 mm 351 mm
Dimension F Centre of Flow 401 mm 401 mm 514 mm 607 mm 700 mm
Dimension G Centre of Flue 134 mm 134 mm 163 mm 163 mm 163 mm
Dimension H Centre of Safety 14 mm 14 mm 14 mm 14 mm 14 mm
Dimension I Centre of Gas 687 mm 687 mm 851 mm 944 mm 1037 mm
Dimension K Centre of Flue (optional) 530 mm 530 mm 530 mm 630 mm 630 mm
Dimension L Depth of Flue (optional) 30 mm 30 mm 90 mm 50 mm 90 mm
Dimension M Distance to Flue (optional) 139 mm 139 mm 50 mm 302 mm 50 mm
Dimension N Centre of Supply (optional) 450 mm 450 mm 202 mm 202 mm 202 mm
Dimension O Centre of Supply (optional) 150 mm 150 mm 167 mm 167 mm 167 mm
3.2 Technical Data
Tab. 2: Technical Data
Model EC three
125
EC three
170
EC three
215
EC three
260
EC three
300
Product-ID-No. CE-0085 CL 0072
Nominal heat input range
Natural gas heating kW 20.0-125.0 28.0-170.0 35.0-215.0 42.0-260.0 48.0-300.0
LPG heating kW 35.0-125.0 35.0-170.0 48.0-215.0 58.0-260.0 58.0-300.0
Nominal heat output range
Natural gas 80/60°C kW 19.2-121.6 26.8-165.8 33.5-210.1 40.2-254.5 45.9-294.0
50/30°C kW 21.3-133.1 29.8-181.3 37.4-229.6 44.9-278.1 51.4-321.3
LPG 80/60°C kW 33.5-121.6 33.5-165.8 46.0-210.1 55.5-254.5 55.5-294.0
50/30°C kW 37.2-133.1 37.3-181.3 51.2-229.6 62.0-278.1 62.1-321.3
Gross efficiency 100% load 80/60°C % Gross 87.74 87.94 88.13 88.28 88.37
50/30°C % Gross 96.03 96.17 96.31 96.45 96.57
Gross efficiency 30% load 40/30°C % Gross 96.57 96.70 96.82 96.93 97.05
Data for design of the chimney to DIN EN 13384 (room air-depending operation)
Exhaust gas temperature 80/60°C °C 57-61 57-61 57-61 57-61 57-61
50/30°C °C 30-37 30-37 30-37 30-38 30-38
Exhaust gas mass flow
Natural gas 80/60°C m3/hr 24.5-152.9 34.3-208.0 42.8-263.1 51.4-318.1 58.7-367.1
50/30°C m3/hr 22.5-142.0 31.5-193.0 39.3-243.9 47.1-294.7 53.9-339.7
LPG 80/60°C m3/hr 40.6-145.1 40.6-197.4 55.7-249.6 67.3-301.8 67.3-348.3
50/30°C m3/hr 38.6-134.2 37.8-182.3 52.2-230.4 63.1-278.4 62.5-320.9
Technical Data
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 11

Model EC three
125
EC three
170
EC three
215
EC three
260
EC three
300
Supply pressure for natural gas min. 18 mbar - max. 25 mbar
CO2-content natural gas * % 9.3 (9.1-9.5 allowed)
Supply pressure LPG nominal 37 bar
CO2-content LPG % 11.0 (10.8-11.2 allowed)
Max. delivery pressure at exhaust gas
outlet
mbar 1.0
Exhaust gas connection mm 160 200
Gas consumtion
Natural gas m3/hr 2.1-13.2 3.0-18.0 3.7-22.8 4.4-27.5 5.1-37.7
LPG kg/hr 2.7-9.7 2.7-13.2 3.7-16.7 4.5-20.2 4.5-23.3
NOx emission at 0% O2(dry) mg/
kWh
35
Max. delivery pressure at flue gas outlet mbar 1.0
Flue gas connection mm 160 200
Flow connection DN 65
Return connection DN 65
Connected loads
International protection IP 22
Electrical connection V/Hz 230 / 50
Max. electr. power consumption W 170 200 330 350 410
Max. water pressure bar 6.0
Min water pressure bar 1.0
Max. flow temp °C 86
Hydraulic resistance
∆T=20 K kPa 2.80 3.40 3.70 3.90 4.00
∆T=11 K kPa 9.00 11.00 12.10 12.70 12.90
Boiler weight (dry) kg 205 240 285 314 344
Boiler water content l 29 34 38 45 53
Height above everything mm 1455
Width mm 692
Depth mm 1008 1171 1264 1357
* in case of fluctuating natural gas composition see section 5.11 CO2-content
Technical Data
12 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

3.3 Hydraulic resistance
Fig. 2: Hydraulic resistance SGB 125 - 300 E
0
50
100
150
200
250
300
350
0 5 10 15 20 25 30 35 40
3/h]
EC three 125 E
EC three 170 E
EC three 215 E
EC three 260 E
EC three 300 E
Hydraulic resistance
Water mass flow
Technical Data
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 13

3.4 Wiring Diagram
Fig. 3: Wiring Diagram
Technical Data
14 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

3.5 Sensor value tables
Tab. 3: Resistance values for outside temperature sensor ATF
Temperature [°C] Resistance [Ω]
-20 8194
-15 6256
-10 4825
-5 3758
0 2954
5 2342
10 1872
15 1508
20 1224
25 1000
30 823
Tab. 4: Resistance values for flow sensor KVS, drinking water sensor TWF, return
sensor KRV, sensor B4
Temperature [°C] Resistance [Ω]
0 32555
5 25339
10 19873
15 15699
20 12488
25 10000
30 8059
35 6535
40 5330
45 4372
50 3605
55 2989
60 2490
65 2084
70 1753
75 1481
80 1256
85 1070
90 915
95 786
100 677
Technical Data
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 15

4. Before installation
4.1 Converting the exhaust and
supply air connection
The exhaust and supply air connection can be converted to adapt to the local con-
ditions of the installation room.
4.1.1 Converting the exhaust connection
In the following picture the conversion of the top passage to the side or rear pas-
sage of the exhaust connection is represented.
Fig. 4: Conversion of the exhaust connection
1
5
4
3
2
1. Remove lower rear wall (2) of the EuroCondense three
2. Remove the gas connection leading upward and make a 87°arc (1)
3. Turn 87°arc (1) in the desired position (side or towards the rear)
4. Remove either the rear cover plate (3) or the side cover plate (4)
5. Mount lower rear wall (2)
6. Glue upper cover plate (5)
4.1.2 Converting the supply air connection
In the following picture the conversion of the top passage to the side or rear pas-
sage of the supply air connection is represented.
Before installation
16 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

Fig. 5: Conversion of the supply air connection
3
2
2
1
1
3
AB
Side supply air connection (A)
1. Remove lower rear wall (2) of the EuroCondense three
2. Loosen screws and remove the cover plate (1)
3. Remove the intake pipe leading upward from the intake pipe elbow (3)
4. Turn intake pipe elbow (3) into the side position
5. Mount lower rear wall (2)
Rear supply air connection (B)
1. Remove lower rear wall (3) of the EuroCondense three
2. Take out cover plate (2) from lower rear wall (3)
3. Remove the intake pipe leading upward with intake pipe elbow
4. Mount straight intake pipe (1)
5. Mount lower rear wall (3)
Before installation
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 17

4.2 Corrosion protection
Caution! Risk of damage of the device!
The combustion air must be free from corrosive elements - especially fluorine and
chlorine containing vapours which are found, for example, in solvents and clean-
ing agents, propellant gases etc.
When connecting heat generators to under-floor heating systems, employing plas-
tic pipe work which is not impervious to oxygen in accordance to DIN 4726, heat
exchangers must be used for separation purposes.
Note: Avoidance of damage in hot water heating systems due to corrosion from
water.
If the pH-values of the system water during operation are outside of the limit val-
ues according to VDI guideline 2035-2 a treatment of the fill water for corrosion is
required. For under-floor heating systems and piping with is not impervious to
oxygen, a system separtion between the boiler and other system components at
risk of corrosion must be used.
4.3 Requirements for heating
circuit water
To ensure economical operation and to keep the heat exchanger in serviceable
condition it may be necessary to treat the filling water with additives. If the water
hardness is greater than 17.5 degrees Clarke or 259mg/litre of Calcium then, this
must be treated. The treatment depends on the total water hardness, system vol-
ume and the size of the boiler.
If, in a special case, a need exists to use additives in a mixture (e.g. hardness sta-
bilser, frost protecion agent, sealing agent,etc.) it has to be observed that the
agents are compatible with each other and the pH-value is not altered. Preferably,
agents from the same manufacturer should be used.
The instructions of the additive manufacturer must be observed.
Released additives
Currently, the following agents have been approved by Potterton Commercial:
- “Full heating protection“ from Fernox
- “Sentinel 100“ from GE Betz
As a single frost protection agent, also Tyfocor® L may be used.
If not approved agents are used, the guarantee becomes void!
When softener facilities are used, water softening to a hardness of minimum 6 to
8 °dH is recommended.
The pH-value must not exceed the permissable value of 8.3.
Maintenance instructions
The water hardness of the heating water has to be checked within the scope of the
recommended maintenance of the boiler (every two years) and, possibly, the re-
spective amount of additive has to be added.
Before installation
18 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13

4.3.1 Further information on the heating water
- The water must not have any foreign matter, such as sweat beads, rust particles,
scale or sludge. During filling, flush the system until only clean water runs out.
When flushing the system,ensure that the water does not flow through the heat
exchanger in the boiler, that the thermostatic radiator valves are removed and
the valve inserts are set to the maximum flow rate.
- If additives are used it is important to follow the instructions of the manufactur-
er.
If, in a special case, it is necessary to use additives in a mixture (e.g. hardness
stabiliser, frost protection agent, sealing agent,etc.) it has to be observed that
the agents are compatible with each other and the pH-value is not altered. Pref-
erably, agents from the same manufacturer should be used.
- For buffer cylinders in conjunction with solar thermal systems or solid fuel boil-
ers, take the buffer capacity into consideration when determining the fill water
volume.
4.3.2 Diagramm Wasserhärte
Zur Vermeidung von Schäden durch Kesselsteinbildung im Kessel ist Fig. 6 zu
beachten.
Before installation
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 19

Fig. 6: Diagramm Wasserhärte
°e
EC three 300
EC three 260
EC three 215
EC three 170
EC three 125
32 34 36 38
Water volume
Water hardness
Beschreibung:
Der Kesseltyp, die Wasserhärte und das Wasservolumen der Anlage müssen bekannt sein. Liegt das Volumen
oberhalb der Kurve, ist eine Teil-Enthärtung des Leitungswassers oder ein Zusatz von Härtestabilisatoren erfor-
derlich.
Beispiel:
SGB 125 E; Wasserhärte 14°dH; 1200 l Wasservolumen
kein Zusatz erforderlich
Berücksichtigt wurde ein übliches Nachfüllvolumen der Anlage.
Before installation
20 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13