Eco CB 85 CH Manual

Original manual
E93.1605.901
Installation, service and user manual
Wall hung high efficiency central heating boiler
CB 85 CH
CB 105 CH
CB 125 CH
CB 155 CH

E93.1605.901 CB CH manual
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TABLE OF CONTENTS
1INTRODUCTION ..................................................................................................................................7
1.1 ABBREVIATIONS........................................................................................................................7
2SAFETY GUIDELINES.........................................................................................................................7
3TECHNICAL DATA CB BOILERS.......................................................................................................8
3.1 FUNCTIONAL INTRODUCTION......................................................................................................8
3.2 LOCATION OF VERSION NUMBERS...............................................................................................8
3.2.1 Technical specifications datasheet...............................................................................9
3.3 ERP SPECIFICATIONS DATASHEET ...........................................................................................11
4DIMENSIONS & CONNECTIONS......................................................................................................12
4.1 CB-85-CH AND CB-105-CH...................................................................................................12
4.2 CB-125-CH ...........................................................................................................................13
4.3 CB-155-CH ...........................................................................................................................14
5ACCESSORIES AND UNPACKING..................................................................................................15
5.1 ACCESSORIES.........................................................................................................................15
5.2 UNPACKING ............................................................................................................................15
6INSTALLATION OF THE CB.............................................................................................................16
6.1 INSTALLATION CLEARANCES.....................................................................................................16
6.2 BOILER INSTALLATION LOCATION REQUIREMENTS.....................................................................16
6.3 MOUNTING THE BOILER............................................................................................................17
7CONNECTIONS .................................................................................................................................18
7.1 BOILER CONNECTIONS.............................................................................................................18
7.2 CONDENSATE DRAIN CONNECTION ...........................................................................................18
7.3 FLOW AND RETURN CONNECTIONS ...........................................................................................19
7.4 THE EXPANSION VESSEL..........................................................................................................19
7.5 PRESSURE RELIEF VALVE.........................................................................................................19
7.6 NON-RETURN VALVE..............................................................................................................19
7.7 BYPASS..................................................................................................................................20
7.8 PUMP FUNCTIONALITY .............................................................................................................20
7.9 FROST PROTECTION................................................................................................................20
7.10 INSTALLING A STRAINER AND/OR DIRT SEPARATOR ....................................................................20
7.11 WATER QUALITY......................................................................................................................21
7.12 USE OF GLYCOL......................................................................................................................21
7.13 CHEMICAL WATER TREATMENT.................................................................................................22
7.14 FLUSH THE SYSTEM WITH FRESH WATER...................................................................................23
7.15 PLASTIC PIPING IN THE HEATING SYSTEM..................................................................................23
7.16 DE-AIR SEQUENCE..................................................................................................................23
7.17 AUTOMATIC FEED VALVE SYSTEMS ..........................................................................................24
7.18 WATER PRESSURE..................................................................................................................24
7.19 INSTALLATION EXAMPLES.........................................................................................................25
7.19.1 Example of a low-resistance heating circuit...............................................................25
7.19.2 Example of a normal single boiler heating circuit with low loss header (preferable) .25
7.19.3 Example of a multiple boiler heating circuit with low loss header ..............................26
8PUMP CHARACTERISTICS..............................................................................................................27
8.1 HYDRAULIC GRAPHS................................................................................................................27
8.2 MODULATING PUMP FOR CH DEMAND.......................................................................................28
8.3 MODULATING PUMP MODES......................................................................................................29
8.3.1 Delta temperature modulation....................................................................................29
8.4 PUMP:MAXIMUM ELECTRICAL POWER.......................................................................................29
9FLUE GAS AND AIR SUPPLY SYSTEM ..........................................................................................30
9.1 GENERAL................................................................................................................................30
9.2 POLYPROPYLENE....................................................................................................................31
9.2.1 Flexible polypropylene................................................................................................31
9.3 STAINLESS STEEL VENT...........................................................................................................31
9.4 AIR SUPPLY ............................................................................................................................31
9.4.1 Combustion air quality................................................................................................32
9.4.2 Air supply through humid areas..................................................................................32
9.4.3 Air inlet pipe materials................................................................................................32

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9.5 ROOM AIR...............................................................................................................................32
9.5.1 Air contamination........................................................................................................32
9.6 PROPER VENT INSTALLATION AND TYPE OF GAS VENT OR VENT CONNECTOR...............................33
9.7 BOILER CATEGORIES -TYPES OF FLUE GAS SYSTEMS................................................................34
9.8 C63 CERTIFIED .......................................................................................................................37
9.9 PIPE HEIGHTS AND MUTUAL DISTANCES ON A FLAT ROOF ...........................................................37
9.10 FLUE GAS AND AIR SUPPLY RESISTANCE TABLE.........................................................................38
9.11 TYPICAL EXAMPLES.................................................................................................................39
9.11.1 Example A: Twin pipe system with separate pipes for flue outlet and air supply ......39
9.11.2 Example B: Twin pipe system with concentric roof terminal......................................40
9.11.3 Example C: Single flue gas outlet. Air supply from boiler room.................................42
9.11.4 Example D: Concentric flue gas/air supply pipe (roof-mounted)................................43
9.11.5 Example E: Concentric system Wall outlet C13 (wall-mounted)................................43
9.11.6 Example F: Separate air supply duct & flue duct in different pressure zone (C53) ...45
10 COMMON FLUE CASCADING..........................................................................................................46
10.1 APPLIANCE .............................................................................................................................46
10.2 SAFETY MEASURES COMMON FLUE SYSTEMS...........................................................................47
10.3 EXISTING COMMON VENTING GUIDELINES..................................................................................49
11 ELECTRICAL INSTALLATION..........................................................................................................50
11.1 GENERAL................................................................................................................................50
11.2 CONNECTION MAINS SUPPLY....................................................................................................50
11.3 ELECTRICAL CONNECTIONS .....................................................................................................50
11.4 EXPLANATION OF THE LOW VOLTAGE CONNECTIONS..................................................................51
11.5 EXPLANATION OF THE HIGH VOLTAGE CONNECTIONS.................................................................52
11.6 LADDER/LOGIC DIAGRAM.........................................................................................................53
11.7 ELECTRICAL SCHEMATICS........................................................................................................54
11.8 SENSOR AVAILABILITY..............................................................................................................56
11.9 NTC SENSOR CURVE...............................................................................................................56
11.10 PROGRAMMABLE IN-AND OUTPUTS ..........................................................................................57
12 BURNER CONTROLLER AND DISPLAY.........................................................................................58
12.1 DISPLAY AND BUTTONS............................................................................................................58
12.2 SCREENS AND SETTINGS. ........................................................................................................59
12.2.1 Set Actual CH setpoint/DHW setpoint directly via the Status overview.....................60
12.2.2 Entering the menu......................................................................................................61
12.2.3 Protected menu items ................................................................................................62
12.2.4 De-aeration Sequence ...............................................................................................62
12.2.5 Language settings ......................................................................................................63
12.2.6 Change the language via the menu ...........................................................................63
12.2.7 Change the language via the menu icons..................................................................63
12.3 BOILER HISTORY .....................................................................................................................63
12.4 ERROR LOGGING.....................................................................................................................64
12.5 SERVICE REMINDER.................................................................................................................65
12.5.1 Service overdue logging.............................................................................................65
12.5.2 Reset the service reminder ........................................................................................65
12.5.3 Menu’s and parameters..............................................................................................65
12.6 GENERAL................................................................................................................................66
12.6.1 Pump start exercise every 24 hours...........................................................................66
12.6.2 Frost protection...........................................................................................................66
12.7 IGNITION CYCLE ......................................................................................................................67
12.7.1 Control functions.........................................................................................................68
12.7.2 On board HMI and LED colors...................................................................................69
12.7.3 Flame detection..........................................................................................................69
12.7.4 Flame recovery...........................................................................................................69
12.8 CONTROL FUNCTIONS..............................................................................................................70
12.8.1 Room thermostat only; CH mode 0 (Default setting) .................................................70
12.8.2 CH with an outdoor temperature reset and thermostat; CH mode 1.........................71
12.8.3 CH with constant circulation system outdoor reset; CH mode 2...............................73
12.8.4 CH with constant circulation and permanent heat demand; CH mode 3...................73
12.8.5 Central Heating with analogue input control of setpoint; CH mode 4 ........................74
12.8.6 CH with analogue input control of power output; CH mode 5....................................75

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12.9 DEMAND FOR DOMESTIC HOT WATER......................................................................................76
12.9.1 No Domestic Hot Water; DHW mode 0......................................................................76
12.9.2 DHW Storage with sensor; DHW mode 1 ..................................................................76
12.9.3 DHW Storage with thermostat; DHW mode 2............................................................77
12.9.4 Instantaneous water heating with plated heat exchanger; DHW mode 3..................77
12.9.5 Anti-legionella protection............................................................................................77
12.9.6 Display menu structure summary...............................................................................79
13 TEMPERATURE PROTECTION........................................................................................................87
14 ERROR INFORMATION.....................................................................................................................88
14.1 BOILER HISTORY.....................................................................................................................88
14.2 BOILER HISTORY AND TIME STAMPS BOILER HISTORY................................................................88
14.3 LOCKOUT CODES.....................................................................................................................89
14.4 BLOCKING CODES ...................................................................................................................91
14.5 WARNINGS .............................................................................................................................93
15 CASCADING ......................................................................................................................................94
15.1 SYSTEM SETUP.......................................................................................................................94
15.2 QUICK-GUIDE CASCADE SET-UP ...............................................................................................94
15.3 BOILER CASCADE COMMUNICATION SETUP................................................................................95
15.3.1 Set the boiler address ................................................................................................95
15.3.2 Setting of the cascade parameters:........................................................................96
15.3.3 Cascade – Heating only Managing boiler ..................................................................97
15.3.4 Cascade – Domestic Hot Water Settings...................................................................97
15.3.5 Cascade – DHW priority.............................................................................................97
15.3.6 Cascade – Boiler rotation...........................................................................................98
15.3.7 Next depending to start selection...............................................................................98
15.4 CASCADE ERROR HANDLING....................................................................................................98
15.4.1 Cascade Frost protection ...........................................................................................98
15.4.2 Emergency mode .......................................................................................................99
15.4.3 Loss of cascade communication................................................................................99
15.4.4 Managing boiler error .................................................................................................99
16 SYSTEM TEST.................................................................................................................................100
17 COMMISSIONING THE BOILER.....................................................................................................101
17.1 FIRST:FLUSHING THE BOILER WITH WATER .............................................................................101
17.2 SECOND:FILLING &VENTING THE BOILER AND THE SYSTEM .....................................................101
17.3 THIRD:CHECK THE WATER FLOW............................................................................................101
17.4 MOUNTING CONDENSATE TRAP .............................................................................................102
17.5 CHECKING GAS PRESSURE.....................................................................................................102
17.6 FIRING FOR THE FIRST TIME ...................................................................................................102
18 ADJUSTING AND SETTING THE BOILER.....................................................................................103
18.1 INTRODUCTION......................................................................................................................103
18.1.1 Combustion table......................................................................................................103
18.1.2 Setting screws venturi- and gas valves: drawings ...................................................104
18.2 ADJUSTMENT PROCEDURES...................................................................................................105
18.3 VENTURI REPLACEMENT ADJUSTMENT...................................................................................105
18.4 CONVERSION FROM NATURAL GAS TO PROPANE......................................................................106
18.5 START UP CHECKLIST ...........................................................................................................108
19 INSPECTION, MAINTENANCE AND SERVICE..............................................................................110
19.1 GENERAL..............................................................................................................................110
19.2 INSPECTION,MAINTENANCE AND SERVICE...............................................................................110
19.2.1 Mounting the burner door.........................................................................................116
19.3 MAINTENANCE CHECKLIST.....................................................................................................117
20 USER INSTRUCTIONS....................................................................................................................117
21 INSTALLATION EXAMPLES...........................................................................................................118
21.1 SYSTEM EXAMPLE 1..............................................................................................................118
21.2 SYSTEM EXAMPLE 2..............................................................................................................118
21.3 SYSTEM EXAMPLE 3..............................................................................................................119
21.4 SYSTEM EXAMPLE 4..............................................................................................................119
21.5 SYSTEM EXAMPLE 5..............................................................................................................120
21.6 SYSTEM EXAMPLE 6..............................................................................................................120
21.7 SYSTEM EXAMPLE 7..............................................................................................................121

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22 Spare parts ......................................................................................................................................122
22.1 CB 85, CB105 AND CB 125 EXPLODED VIEW ........................................................................122
22.2 CB 155 EXPLODED VIEW.......................................................................................................124
22.2.1 Part numbers CB 85-155..........................................................................................126
23 USER’S PART..................................................................................................................................129
23.1 ABBREVIATIONS....................................................................................................................129
23.2 SAFETY GUIDELINES..............................................................................................................129
23.3 TO TURN OFF GAS TO THE APPLIANCE.....................................................................................129
23.4 MAINTENANCE AND INSPECTION.............................................................................................129
23.5 DISPLAY AND BUTTONS..........................................................................................................130
23.6 SCREENS AND SETTINGS .......................................................................................................131
23.7 STARTING THE BOILER...........................................................................................................132
23.8 CHANGING THE SETPOINT AND/OR ENABLING CH/DHW..........................................................133
23.8.1 Changing the Central Heating setpoint directly........................................................133
23.8.2 Changing the DHW setpoint directly. .......................................................................133
23.8.3 Enable / Disable CH or DHW control. ......................................................................133
23.9 THE MENU (BUTTON)...........................................................................................................134
23.10 PASSWORD...........................................................................................................................134
23.11 AVAILABLE MENU ITEMS ........................................................................................................134
23.11.1 Central Heating (CH)................................................................................................135
23.11.2 Domestic Hot Water (DHW) .....................................................................................135
23.11.3 Information................................................................................................................135
23.11.4 Software Versions ....................................................................................................135
23.11.5 Boiler Status.............................................................................................................135
23.11.6 Boiler History............................................................................................................135
23.11.7 Error log....................................................................................................................135
23.11.8 Service......................................................................................................................136
23.11.9 Settings.....................................................................................................................136
23.11.10 General Settings.......................................................................................................136
23.11.11 Language..................................................................................................................136
23.11.12 Unit Type ..................................................................................................................136
23.11.13 Date & Time..............................................................................................................136
23.11.14 Time zone settings ...................................................................................................136
23.11.15 Display settings ........................................................................................................136
23.11.16 Cascade mode .........................................................................................................137
23.11.17 Other Settings...........................................................................................................137
23.11.18 Boiler settings...........................................................................................................137
23.12 BOILER HISTORY...................................................................................................................137
23.13 ERROR LOGGING...................................................................................................................137
23.14 SERVICE REMINDER...............................................................................................................138

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1 INTRODUCTION
This manual is written for:
The installer.
System design engineer.
The service engineer.
The user (see chapter 22).
Eco Heating Systems Groningen B.V. is not accountable for any damage caused by incorrect following these
instructions. For service and repair purposes use only original Eco Heating Systems Groningen B.V. spare parts.
All documentation produced by the manufacturer is subject to copyright law.
1.1 Abbreviations.
CB = Condensing Boiler
DHW = For Direct Hot Water (drinking water) usage only.
CH = Central Heating (for central heating purposes and/or indirect hot water).
BCU = burner control unit.
PCB = printed circuit board (burner controller).
PB = pixel button = display board/ control panel.
2 SAFETY GUIDELINES
“FOR YOUR SAFETY READ BEFORE OPERATING”
WARNING:
Improper installation, adjustment, alteration, service or maintenance can cause property
damage, personal injury (exposure to hazardous materials) * or loss of life. Installation and
service must be performed by a qualified installer, service agency or the gas supplier (who
must read and follow the supplied instructions before installing, servicing, or removing this
water heater.
“A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the
burner. Do not try to light the burner by hand.”
“B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because
some gas is heavier than air and will settle on the floor.”
“C. Do not use this appliance if any part has been under water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the control system and any gas control which has been
under water.”
What to do if you smell gas:
Do not use any electrical equipment.
Do not press any switches.
Close the gas supply.
Ventilate the room (open the windows and/or outdoor water heater room doors).
Immediately warn the installer.
The manufacturer/supplier is not liable for any damage caused by inaccurately following of these
mounting instructions. Only original parts may be used when carrying out any repair or service
works.
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved.
The protection class for gas appliance type B23(P) is IP20.
Only with the special air inlet (see § 5.1 "Accessories"), the protection class is IPX4D.

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3 TECHNICAL DATA CB BOILERS
3.1 Functional introduction
The CB boilers are central heating boilers with a maximum high efficiency. Such a performance can be reached
by, amongst other things, using a special heat exchanger made of stainless steel. This allows the flue gases to
cool down below the condensation point, and so release extra heat. This has an immediate positive impact on the
efficiency.
The CB boiler is standard set for Natural gas.
Gases used must meet the European standard EN 437. Fuel used must have sulphur rates according to the European
standard, a maximum annual peak over a short period of time of 150 mg/m3 and an annual average of 30 mg/m3.
Boiler controller includes:
Cascade control for up to sixteen boilers
Remote operation and heat demand indication from each boiler
Weather compensation control
Calorifier control
Connections for:
On/Off thermostat or modulating thermostat
0-10 VDC remote flow temperature (set point)
control.
0-10 VDC remote burner input control.
Outdoor temperature sensor.
External calorifier pump or diverter valve.
Boiler pump.
PWM control for external boiler pump.
System pump.
External flow switch or external safety device.
Modbus.
External system sensor.
DHW indirect sensor or aquastat.
Touchscreen.
External Ignition transformer.
3.2 Location of version numbers
Parameter Version
-To be found on the small sticker at the side of the
burner controller v.A = “Version A” for instance
Burner controller hardware version
– Mentioned at the second line on the white sticker
at the side of the burner controller.
957MN25_3Rh4b e.g.
Burner Controller Software Versions
– Press the menu button , go to Information and then to Software Versions.
Software Versions
Display [63EF 83BC]
Boiler [5C79 14A9]
Device Group 900MN
Information
Software Versions
Boiler Status
Boiler History
Error Log
i

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3.2.1 TECHNICAL SPECIFICATIONS DATASHEET
GENERAL
Product identification number: 0063CT3633
Gas Appliance Type
-
B23(P), C13, C33, C43, C53, C63, C83, C93
Type boiler
CB 85 CH
CB 105 CH
CB 125 CH
CB 155 CH
Classification
II2EL3P II2ELL3P II2ELL3P II2ELL3P
Dimensions (h x w x d) mm
845 x 440 x 530
Water content estimated
litre
5.0
6.5
8.3
10.4
Weight (empty) kg 77 79 83 86
Flow/return connection (boiler) inch R 1” R 1” R 1” R 1¼”
Gas connection inch R ¾” R ¾” R ¾” R 1”
Flue connection twin pipe mm 100 100 100 150
Flue connection concentric pipe mm 100/150 100/150 100/150 N.A.
HEATING Values min-max:
Nominal input (gross) (G20) kW 17.1 - 90.7 20.7 - 108.1 26.2 - 132.6 38.9 - 161.4
Nominal input (net) (G20) kW 15.4 - 81.7 18.6 - 97.3 23.6 - 119.4 35.0 - 145.3
Nominal input (gross) (G25.3) kW 17.4 - 88.6 20.8 - 105.7 26.4 - 129.7 39.3 - 158.0
Nominal input (net) (G25.3) kW 15.7 - 79.7 18.7 - 95.2 23.8 - 116.9 35.4 - 142.2
Nominal input (gross) (G31) kW 17.4 - 87.4 20.6 - 103.4 26.2 - 131.2 42.7 - 154.4
Nominal input (net) (G31) kW 16.0 - 80.5 19.0 - 95.2 24.1 - 120.8 39.3 - 142.2
Nominal output 80/60 °C (G20) kW 14.9 - 79.1 18.0 - 94.2 22.9 - 115.7 33.9 - 140.9
Nominal output 50/30 °C (G20) kW 16.0 - 85.1 19.5 - 101.8 24.7 - 124.7 36.4 - 151.0
Nominal output 37/30 °C (G20) kW 16.6 - 88.4 20.2 - 105.5 25.6 - 129.4 38.0 - 157.8
Nominal output 80/60 °C (G25.3)
kW
15.2 - 77.0 18.1 - 92.3 23.1 - 113.4 34.3 - 137.9
Nominal output 50/30 °C (G25.3)
kW
16.4 - 83.0 19.6 - 99.6 24.9 - 121.1 36.8 - 147.7
Nominal output 37/30 °C (G25.3)
kW
17.0 - 88.4 20.3 - 105.5 25.8 - 129.4 38.4 - 157.8
Efficiency (input 30%, return tem-
perature 30 °C)
% 108.2% 108.4% 108.4% 108.6%
GAS CONSUMPTION Values min-max:
Natural gas (G20) m3/h 1.6 – 8.5 1.9 – 10.2 2.5 – 12.5 3.7 – 15.3
Natural gas (G25.3) m3/h 1.8 – 9.2 2.2 – 11.6 2.8 – 14.2 4.1 – 16.3
Propane (G31) 1 m3/h 0.6 – 3.2 0.8 – 3.9 1.0 – 4.8 1.6 – 5.7
Gas supply pressure
nominal 2
G20 mbar 20
G25.3 mbar 25
G31 mbar 37
NOTES
1Using propane, a restriction needs to be placed and the maximum fan speed needs to be reduced
2Min. and max. gas supply pressures:
p nom [mbar]
p min [mbar]
p max [mbar]
G20
20
17
25
G25.3
25
20
30
G31 37 25 57.5

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Type boiler
CB 85 CH
CB 105 CH
CB 125 CH
CB 155 CH
EMISSION Values min-max:
CO2flue gas 3G20 % 7.9 – 8.4 7.9 – 8.4 7.9 – 8.4 7.9 – 8.4 G25.3 % 8.4 – 8.2 8.4 – 8.2 8.4 – 8.2 8.4 – 8.2
G31 % 9.3 – 10.5 9.3 – 10.3 9.5 – 10.3 9.5 – 10.3
O2flue gas 3G20 % 6.9 - 6.0 6.9 - 6.0 6.9 - 6.0 6.9 - 6.0 G25.3 % 6.1 – 5.7 6.1 – 5.7 6.1 – 5.7 6.1 – 5.7
G31 % 6.7 – 4.9 6.7 – 5.2 6.4 – 5.2 6.4 – 5.2
NOx class - 6 6 6 6
Flue gas temperature at combustion air
temperature = 20 °C °C 60 - 90
Mass flow flue gas (min/max) g/s 8.0 - 42 10 - 51 12 - 62 15 - 76
Available pressure for the flue system 4Pa 200
INSTALLATION
Resistance boiler ∆
T = 20 K
m.W.C 4.0 3.4 3.8 3.6
∆
T = 25 K
m.W.C 2.8 2.3 2.5 2.4
Pressure boiler min-max. bar 1.0 – 6.0
Max. flow temperature °C 90
ELECTRIC
Maximum power consumption 5 W 190 280 280 280
Power supply V/Hz 230 / 50
Protection class 6- IPX4D
NOTES
3CO2of the unit measured/set without the boiler front panel in place
4Maximum allowed combined resistance of flue gas and air supply piping at high fire
5Power consumption is measured without circulation pump
6For gas appliance type B23(P) only class IPX4D with special air inlet (see § 5.1 "Accessories"), otherwise
the protection class is IP20.
Boiler is IP20 applying a
dust filter or bird screen only
Boileris IPX4Dapplyinga dustfil-
ter or bird screen with two elbows
and if necess
ary, a short straight
pipe.

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3.3 ERP specifications datasheet
Technical parameters according to the European ERP (Energy Related Products) legislation:
Type Boiler:
CB 85 CH
CB 105 CH
CB 125 CH
CB 155 CH
Condensing boiler: Yes Yes Yes Yes
low temperature boiler:
No
No
No
No
B11 boiler: No No No No
Cogeneration space heater:
No
No
No
No
Combination heater: No No No No
Unit:
Value
Value
Value
Value
Rated heat output
kW
78.9
94.3
115.6
140.9
P-rated (P4) at 60-80
⁰
C kW 78.9 94.3 115.6 140.9
Heat output (P1) 30% at 30-37
⁰
C kW 25.2 31.6 38.8 46.5
Seasonal space heating energy
efficiency (ɳs).
% 92.4 92.6 92.7 92.9
energy efficiency (ɳ4) at 60-80
⁰
C % 87.2 87.2 87.3 87.3
energy efficiency (ɳ1) at 30-37
⁰
C % 97.4 97.6 97.7 97.8
Auxiliary electricity consumption
At full load (elmax).
kW
0.183
0.271
0.280
0.278
At part load (elmin) kW 0.024 0.023 0.027 0.031
In standby mode (Psb) kW 0.007 0.007 0.007 0.007
Other
Standby heat loss (Pstby) kW 0.066 0.070 0.075 0.083
Ignition burner power consumption (P
ign
)
kW
0.000
0.000
0.000
0.000
Emissions (NOx) of nitrogen oxides
(EN15502-1:2012+A1:2015)
1 mg/kWh 23.1 21.3 23.9 20.1
Sound power level, indoors
(EN 15036-1:2006) dB 65.8 68.0 67.8 73.0
1These numbers are used to assign credits according to the BREEAM standards

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4 DIMENSIONS & CONNECTIONS
4.1 CB-85-CH and CB-105-CH
CB-85-CH & CB-105-CH Twin pipe CB-85-CH & CB-105-CH Concentric
Connections Twin Pipe Concentric
A
Flow
BSP 1”
B
Return
BSP 1”
C
Condensate
Flexible hose Ø 25/21 mm
D
Gas
BSP ¾”
Flue gas
100 mm 100-150 mm
Air inlet
100 mm 100-150 mm
EHS.T0200.50311
EHS.T0200.50321

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4.2 CB-125-CH
CB-125-CH Twin pipe CB-125-CH Concentric
Connections Twin Pipe Concentric
A
Flow
BSP 1”
B
Return
BSP 1”
C
Condensate
Flexible hose Ø 25/21 mm
D
Gas
BSP ¾”
Flue gas
100 mm 100-150 mm
Air inlet
100 mm 100-150 mm
EHS.T0200.50211
EHS.T0200.50221

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14
4.3 CB-155-CH
CB-155-CH Twin pipe
Connections Twin Pipe
A
Flow
BSP 1¼”
B
Return
BSP 1¼”
C
Condensate
Flexible hose Ø 25/21 mm
D
Gas
BSP 1”
Flue gas
150 mm
Air inlet
150 mm
EHS.T0200.50111

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15
5 ACCESSORIES AND UNPACKING
5.1 Accessories
Depending on the selected controlling behaviour for the central heating system and/or the optional use of a calo-
rifier, the following items can be supplied with the boiler. Ask your supplier for the specifications.
Item
Part Nº.
Adhesive kit 04
S022.000.001
LOCTITE® SI 5366™ 50ml
S022.000.002
Outdoor (air) temperature sensor: 10kOhm@25°C -B3977
S022.500.020
External flow temperature sensor for behind the low loss header: 10kOhm@25°C - B3977
S022.500.021
Calorifier temperature sensor: 10kOhm@25°C - B3977
S022.500.009
Pump CB 85, CB 105
S022.500.011
Pump CB 125
S022.500.012
Pump CB 155
S022.500.013
WIFI / IP module
S022.500.006
Software + interface cable for programming the boiler with a computer/laptop
S022.500.015
External ignition transformer
S022.500.016
Propane orifice CB 85 and CB 105
S022.500.001
Propane orifice CB 125
S022.500.004
Propane orifice CB 155
S022.500.010
Special air inlet for IPX4D protection on B23(P) boilers CB 85, CB 105 and CB 125
S022.500.018
Special air inlet for IPX4D protection on B23(P) boiler CB 155
S022.500.019
5.2 Unpacking
The CB boiler will be supplied with the following documents and accessories:
•One “Installation, user and service instructions” manual for the installer
•One suspension bracket with locking plate and bolts
•Spare fuses for the boiler controller (At the burner controller)
•Spare nuts for mounting the burner plate (in a bag attached to the front of the gas valve)
•Bottom part of the condensate trap.
After delivery, always check the boiler package to see if it is complete and without any defects. Report any imper-
fections immediately to your supplier.

E93.1605.901 CB CH manual
16
6 INSTALLATION OF THE CB
6.1 Installation clearances
On all sides of the boiler at least 5 cm of clearance must be applied to walls or wall units, 30 cm above the top
side of the boiler and 25 cm from the bottom/pump of the boiler.
Clearances to wall, ceiling and floor in cm
A: Front
B: Top
C: Sides
D: Back
E: Bottom
Minimum service Clearances
15
30
5
0
25
Recommended Service clearances
64
35
50
0
75
Clearances from combustible materials 1. Hot water pipes—at least 6 mm from combustible materials.
2. Vent pipe – at least 25 mm from combustible materials.
The installation area/room must have the following provisions:
•230 V - 50 Hz power supply with ground.
•Open connection to the sewer system for draining condensing water.
•A wall or stand to properly support the weight of the boiler.
Note: The wall used for mounting the boiler must be able to hold the weight of the boiler. If not, it is recommended
to mount the boiler by means of a (cascade) frame.
6.2 Boiler Installation Location Requirements
Other considerations related to the boiler location.
•The ventilation of the boiler room must meet local and national standards and regulations, regardless of
the selected supply of fresh air to the boiler.
•The flue gas pipes must be connected to the outside wall and/or the outside roof.
•The installation area must be dry and frost-free.
•The boiler has a built-in fan that will generate noise, depending on the total heat demand. The boiler
location must minimize any disturbance this might cause. Preferably mount the boiler on a brick wall.
•There must be sufficient lighting available in the boiler room to work safely on the boiler.
•When a boiler is positioned at the highest point of the installation, the supply and return pipes must first
protrude 0.5 m above the top of the boiler, before these pipes go to the installation side. In other words,
the water level must always be 0.5 meters above the top of the boiler and an automatic air vent must be
installed in the supply or return pipe.
•Remind the positioning of electrical components in relation to the temperature sensitivity.
•Make sure there is an open connection with the sewer to drain the condensate. This connection must be
lower than the condensate drains level of the boiler.
Ceiling
Wall
Pump

E93.1605.901 CB CH manual
17
The boiler must be positioned and installed by a skilled installer in accordance with all applicable standards and
regulations. Commissioning of the boiler must be done by a skilled service/commissioning engineer, who is trained
for this type of boiler.
6.3 Mounting the boiler
Before mounting and installing the boiler the following connections must be considered:
•Flue gas system and pipe connections
•Air supply system and connections
•Flow and return pipe connection
•Condensate and pressure relief valve drainage
•Power supply (the power connection positioned
above the boiler preferably)
•Gas pipe.
Determine the position of the boiler by using the included suspension bracket or a suspension frame (when sup-
plied). While marking the holes, ensure that the suspension bracket or frame is perpendicular and the boiler does
not lean forward. If necessary adjust the position with the adjusting bolts at the lower rear side of the back panel
(see drawing). When the adjusting bolts aren’t sufficient, fill the gap behind the bolts to get the boiler in position.
The boiler position lies between the boiler hanging level and hanging slightly backwards (min. 0.5° - max 1.5°).
The boiler may not lean forward in the mounted position.
Lock the suspension bracket with
the security cover before making
any other connections to the
boiler. This security cover will pre-
vent the boiler from falling off the
bracket. Don't use excessive
force during the mounting of the
boiler connections.
All lines/piping must be mounted free of tension. The weight of the installation components must be
supported separately from the boiler so there will be no standing forces on the connections.
This might influence the mounting position of the boiler.
3. Lock boiler with locking plate
and two bolts
2. Suspend
boiler with
suspension
bracket on
mounting
bracket
1. Attach mounting bracket to wall
with inclined side facing upwards
4. Level boiler using
adjusting bolts
suspension
detail
Slightly backwards (min. 0.5° - max 1.5°)
for the condensate to properly drain

E93.1605.901 CB CH manual
18
7 CONNECTIONS
7.1 Boiler connections
1 – Flow (Hot water out)
2 – Return (Cold water in)
3 – Gas
4 – Condensate trap cleaning point
5 – Condensate drain
6 – Automatic air vent.
Strain on the gas valve and fittings may result in vibration, premature component failure and leakage and
may result in a fire, explosion, property damage or serious injury. Do not use an open flame to test for
gas leaks. Failure to follow these instructions may result in fire.
7.2 Condensate drain connection
The condensate drain is placed at the centre and at the bottom
of the boiler and has a 19 mm hose discharge. Connect this
flexible hose to the sewer system.
Use only plastic parts with the condensate drain. Metal lines are
not allowed.
Blockage of this drain might damage the boiler. The drain con-
nection is correct when the condensate can be seen flowing
away, e.g. using a funnel. Any damage that might occur, when
the drain is not installed correctly, is not covered by the war-
ranty of the boiler.
There must be an open connection of the condensate hose into
the sewage system. A possible vacuum in the sewage system
must never give the opportunity to suck on the boiler’s conden-
sate drain hose.
When mounting the bottom part of the condensate trap, before commissioning the boiler and/or after
maintenance, the condensate trap must ALWAYS be completely filled with water.
This is a safety measure: the water in the condensate trap keeps the flue gases from leaking
out of the heat exchanger via the condensate drain.
1 2 3 4 5 6
Open connection
to the sewer.

E93.1605.901 CB CH manual
19
7.3 Flow and return connections
Use T-pieces for externally mounting the pres-
sure relief valve and the boiler bleed valve for
servicing the boiler. We advise to install two
service valves in the flow and return pipes un-
derneath the boiler, so the boiler can be iso-
lated from the heating system and eventually
disconnected, when needed.
When using a system pump, this pump must
always be mounted in the return pipe of the
heating system.
Do not use chloride-based fluxes for soldering
any pipes of the water system.
7.4 The expansion vessel
The capacity of the expansion vessel must be
selected and based on the capacity of the cen-
tral heating system and the static pressure.
Suggested is to fit the expansion vessel in the
return pipe of the central heating system. It can
be combined with the drain valve for service.
See the drawing.
7.5 Pressure relief valve
The boiler has no internal pressure relief valve. This must be installed close to the boiler in the flow pipe of the
heating system. When having cascaded boilers, each boiler must have its own pressure relief valve.
It is recommended to install service valves, so the boiler can be isolated from the heating system, when needed.
Make sure that the pressure relief valve is mounted between the boiler and the service valves.
The specifications and size of the relief valve must be determined by the installer and must comply with all appli-
cable regulations and boiler capacity.
7.6 NON-Return valve.
All CB boilers have a non-return valve installed in the gas-air mixing pipe just before the burner. Flue gas recircu-
lation is prevented by the non-return valve. The prevention of recirculation also reduces standby losses through
the flue of the boiler. This creates a higher thermal efficiency.
The condensate trap must al-
ways be filled to the edge with
water, before replacing to the
unit.
Pressure
relief valve
Boiler bleed
valve for service
Boiler
service valves
BOILER
EHS.T0501.100
Expansion
Vessel

E93.1605.901 CB CH manual
20
7.7 Bypass
The boiler has no internal bypass. When many thermostatic valves are being used, the system must have a by-
pass to allow an adequate flow when all thermostatic valves are closed. Instead of a bypass also a low-loss
header can be used for this function.
The boiler flow will also be influenced when a pipe of the heating system is frozen / blocked. Make sure all heating
pipes are free from the risk of frost. If there is the risk of freezing of the heating system, all the pipe section must
be insulated and/or protected with the help of a tracing.
7.8 Pump functionality
Delta T monitoring:
A high temperature difference between supply and return of the boiler can indicate a clogged heat exchanger or
filter, or a defective pump. The burner load automatically decreases when the Return/Supply temperature
differential increases too much. See § 13 "Temperature protection".
7.9 Frost protection
The boiler has a built-in frost protection that is automatically activating the central heating pump when the boiler
return (water) temperature drops below 10 °C (programmable). When the boiler return temperature drops below
5 °C (programmable), the burner is also ignited. The pump and/or burner will shut down as soon as the return
temperature has reached 15 °C (programmable). The mentioned temperatures are related to the temperatures
measured by the RETURN sensor of the boiler. This frost protection function will not fire up the boiler in case of
a “general blocking” of the burner demand.
NOTICE: This “Frost Protection” function is only useable for the boiler and not for the whole central heating sys-
tem. Because it concerns a programmable setting, a boiler damaged by frost is not covered under warranty.
7.10 Installing a strainer and/or dirt separator
Always install a strainer (water filter)
and/or a dirt separator in the return
pipe of the boiler; in such a way that
the water going to the boiler is free of
any debris/particles. When using a wa-
ter filter always check a week after in-
stallation to determine the strainer
cleaning interval. Advice is to mount
valves before and after the strainer, in-
cluding an air bleed valve, so the
strainer can be isolated from the heat-
ing circuit for service operations. Clean
water is very important, blocked and/or
polluted heat exchangers, including
failures and/or damages caused by
this blockage are not covered by the
warranty.
SYSTEM WITH DIRT SEPARATOR
SYSTEM WITH STRAINER
SYSTEM WITH STRAINER AND DIRT SEPARATOR
DIRT SEPARATOR
DIRT
SEPARATOR
WATER RE-
TURN FROM
SYSTEM
WATER RE-
TURN
FROM SYS-
TEM
WATER
RETURN
FROM
SYSTEM
WATER FLOW
TO BOILER(S)
WATER FLOW
TO BOILER(S)
WATER
FLOW TO
BOILER(S)
DIRT
BLEED
VALVE
DIRT
BLEED
VALVE
AIR
BLEED
VALVE
AIR
BLEED
VALVE
VALVE
VALVE
VALVE
VALVE
STRAINER
(WATER FILTER)
STRAINER
(WATER FILTER)