DE DIETRICH TWINEO EGC 25 User Manual
Twineo
Gas fired floor-standing condensing boiler
EGC 25
EN
User Guide
300026082-001-02
Contents
1 Introduction ................................................................................................4
1.1 Symbols used .......................................................4
1.1.1 Symbols used in the manual ...................................4
1.1.2 Symbols used on the equipment .............................4
1.2 Abbreviations ........................................................5
1.3 General ..................................................................5
1.3.1 Manufacturer’s liability .............................................5
1.3.2 Installer’s liability .....................................................6
1.3.3 User’s liability ..........................................................6
1.4 Certifications .........................................................6
2 Safety instructions and recommendations ..............................................7
2.1 Safety instructions ...............................................7
2.2 Recommendations ................................................8
3 Description ..................................................................................................9
3.1 Operating principle ...............................................9
3.1.1 Gas/air setting .........................................................9
3.1.2 Combustion .............................................................9
3.2 Main parts ............................................................10
3.3 Control panel .......................................................11
3.3.1 Description of the keys ..........................................11
3.3.2 Description of the display ......................................11
4 Operating the appliance ..........................................................................14
4.1 Putting the appliance into operation ................14
4.2 Reading out measured values ...........................14
4.3 Changing the settings ........................................15
4.3.1 Parameter descriptions .........................................15
4.3.2 Modification of the user-level parameters .............16
4.3.3 Setting the manual mode ......................................18
4.3.4 Changing the heating temperature ........................18
4.3.5 Modifying the domestic hot water temperature
setting ....................................................................18
4.3.6 Modifying the domestic hot water set point
temperature ...........................................................19
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Contents
4.4 Installation shutdown .........................................19
4.5 Antifreeze protection ..........................................19
5 Checking and maintenance .....................................................................20
5.1 General instructions ...........................................20
5.2 Periodic checks ..................................................20
6 Troubleshooting .......................................................................................22
6.1 Error messages (Sub-status 9) ........................22
6.2 Faults (type code Exx) ........................................24
7 Technical specifications ..........................................................................28
7.1 Technical specifications ....................................28
8 Energy savings .........................................................................................29
8.1 Energy-saving advice .........................................29
8.2 Recommendations ..............................................29
9 Warranty ....................................................................................................30
9.1 General ................................................................30
9.2 Warranty terms ...................................................30
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D000241-C
EGC 25
1 Introduction
1.1 Symbols used
1. Introduction
1.1.1. Symbols used in the manual
In these instructions, various danger levels are employed to draw the
user’s attention to particular information. In so doing, we wish to
safeguard the user’s safety, obviate hazards and guarantee correct
operation of the appliance.
DANGER
Risk of a dangerous situation causing serious physical
injury.
WARNING
Risk of a dangerous situation causing slight physical
injury.
CAUTION
Risk of material damage.
Signals important information.
¼Signals a referral to other instructions or other pages in the
instructions.
1.1.2. Symbols used on the equipment
4
~
Protective earthing
Alternating current
Before installing and commissioning the device, read
carefully the instruction manuals provided.
Dispose of the used products in an appropriate recovery
and recycling structure.
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This appliance must be connected to the protective earth.
4
1 2
M002628-A
1. Introduction
1.2 Abbreviations
EGC 25
Caution: danger, live parts.
Disconnect the mains power prior to any operations.
4 3CE: Collective conduit for sealed boiler
4 DHW: Domestic hot water
4 Hi: Lower heating value LHV (Nett)
4 Hs: Higher heating value HHV (Gross)
4 PPS: Polypropylene hardly inflammable
4 PCU: Primary Control Unit - PCB for managing burner operation
4 PSU: Parameter Storage Unit - Parameter storage for PCBs
PCU and SU
4 SCU: Secondary Control Unit - control panel PCB
4 SU: Safety Unit - Safety PCB
4 HRU: Heat Recovery Unit
4 3WV: 3-way valve
4 HL: High Load - DHW tank with plate exchanger
4 SL: Standard Load - DHW tank with coil
4 SHL: Solar High Load - Solar DHW tank with plate exchanger
4 SSL: Solar Standard Load - Solar DHW tank with coil
1.3 General
1.3.1. Manufacturer’s liability
Our products are manufactured in compliance with the requirements
of the various applicable European Directives. They are therefore
delivered with [ marking and all relevant documentation.
In the interest of customers, we are continuously endeavouring to
make improvements in product quality. All the specifications stated in
this document are therefore subject to change without notice.
Our liability as the manufacturer may not be invoked in the following
cases:
4 Failure to abide by the instructions on using the appliance.
4 Faulty or insufficient maintenance of the appliance.
4 Failure to abide by the instructions on installing the appliance.
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EGC 25 1. Introduction
1.3.2. Installer’s liability
The installer is responsible for the installation and inital start up of the
appliance. The installer must respect the following instructions:
4 Read and follow the instructions given in the manuals provided
with the appliance.
4 Carry out installation in compliance with the prevailing legislation
and standards.
4 Perform the initial start up and carry out any checks necessary.
4 Explain the installation to the user.
4 If a maintenance is necessary, warn the user of the obligation to
check the appliance and maintain it in good working order.
4 Give all the instruction manuals to the user.
1.3.3. User’s liability
To guarantee optimum operation of the appliance, the user must
respect the following instructions:
1.4 Certifications
4 Read and follow the instructions given in the manuals provided
with the appliance.
4 Call on qualified professionals to carry out installation and initial
start up.
4 Get your installer to explain your installation to you.
4 Have the required checks and services done.
4 Keep the instruction manuals in good condition close to the
appliance.
This appliance is not intended to be used by persons (including
children) whose physcial, sensory or mental capacity is impaired or
persons with no experience or knowledge, unless they have the
benefit, through the intermediary of a person responsible for their
safety, of supervision or prior instructions regarding use of the
appliance. Care should be taken to ensure that children do not play
with the appliance.
To prevent hazardous situations from arising, if the mains lead is
damaged it must be replaced by the original manufacturer, the
manufacturer’s dealer or another suitably skilled person.
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CE identification no
NOx classification
Type of connection Chimney: B23, B
CE-0085CM0178
5 (EN 297 pr A3, EN 483)
Flue gas outlet: C
C
93(x)
33
13(x)
, C
33(x)
, C
43(x)
, C53, C
83(x)
,
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2. Safety instructions and recommendations EGC 25
2 Safety instructions and
recommendations
2.1 Safety instructions
DANGER
If you smell gas:
1. Do not use a naked flame, do not smoke, do not
operate electrical contacts or switches ( doorbell,
light, motor, lift, etc..).
2. Shut off the gas supply.
3. Open the windows.
4. Evacuate the premises.
5. Call your fitter.
DANGER
If you smell flue gases:
1. Switch the appliance off.
2. Open the windows.
3. Evacuate the premises.
4. Call your fitter.
WARNING
Depending on the settings of the appliance:
4 The temperature of the flue gas conduits may exceed
60°C.
4 The temperature of the radiators may reach 85°C.
4 The temperature of the domestic hot water may reach
65°C.
CAUTION
Do not neglect to service the appliance:
4 For completely safe and optimum operation, you
must have your boiler regularly serviced by an
approved installer.
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EGC 25 2. Safety instructions and recommendations
2.2 Recommendations
WARNING
Only qualified professionals are authorised to work on the
appliance and the installation.
4 Regularly check the water pressure in the installation (minimum
pressure 0.8 bar, recommended pressure between 0.08 and 1.5
bar).
4 Keep the appliance accessible at all times.
4 Never remove or cover labels and rating plates affixed to the
appliance. Labels and rating plates must be legible throughout the
entire lifetime of the appliance.
4 The appliance should be on Summer or Antrifreeze mode rather
than switched off to guarantee the following functions:
- Anti blocking of pumps
- Antifreeze protection
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3. Description EGC 25
3 Description
3.1 Operating principle
3.1.1. Gas/air setting
Air is sucked in by the fan and the gas injected into the venturi
attached to the fan inlet. The fan rotation speed modulates and adapts
to thermal energy requirements thanks to the temperatures measured
by the various sensors. The gas and air are mixed in the venturi, which
enables operation at a constant ratio. The noise of the venturi is
absorbed by a silencer attached to its inlet. The gas/air mixture is
carried to the burner in the top of the exchanger, guided by the premix channel.
3.1.2. Combustion
The burner heats the heating water circulating in the heat
exchanger. At a return temperature lower than around 55°C, the flue
gases cool down to a temperature lower than the dew point, thus
causing the condensation of the water vapour contained in the flue
gases in the lower section of the heat exchanger. The heat released
during this condensation process (the latent heat or condensing heat)
is also transferred to the heating water. The cooled combustion gases
are evacuated via the combustion gas outlet flue. The condensation
water is evacuated via a siphon.
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