DE DIETRICH TWINEO EGC 25 User Manual

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Twineo

Gas fired floor-standing condensing boiler

EGC 25

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

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.

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)

13(x)

, C

33(x)

, C

43(x)

, C53, C

83(x)

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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C003072-C

1234

EGC 25 3. Description

3.2 Main parts

Flue gas discharge pipe

Flue gas measuring point

Heat exchanger

Ignition/ionization electrode

Box for the control PCBs

Control panel

Command module

Water pressure sensor

Circulation pump

Hydroblock

3-way valve

Safety valve

Casing

Expansion vessel

Combined venturi and gas valve unit

Fan

Air intake silencer

Mixer pipe

Automatic air vent

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)

rrr

ddd

1 2

SERVICE

°C°Fh barPsi % rpm kW uA x10 l/min

°CSt:

M002715-A

A B

E F

C D

)

1 2

SERVICE

°C°Fh barPsi % rpm kW uA x10 l/min

°CSt:

M002716-A

3. Description EGC 25

3.3 Control panel

3.3.1. Description of the keys

3.3.2. Description of the display

Key functions

t d

[-]

Return button j, Escape G or Manual reset t Heating temperature button d or [-] DHW temperature button r or [+] S [Enter] Key ) [Chimney-sweeping] keys

Press keys A and B simultaneously f [Menu] keys

Press keys C and D simultaneously

Back to the previous level without saving the modifications made

Manual reset

Central heating function: Access to the max. heating temperature parameter.

To reduce a value

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)

rrr

1 2

SERVICE

°C°Fh barPsi % rpm kW uA x10 l/min

°CSt:

M002717-A

)

rrr

ddd

1 2

SERVICE

°C°Fh barPsi % rpm kW uA x10 l/min

°CSt:

M002718-A

)

rrr

ddd

1 2

SERVICE

°C°Fh barPsi % rpm kW uA x10 l/min

°CSt:

M002719-A

)

rrr

ddd

1 2

SERVICE

°C°Fh

barPsi

% rpm kW uA x10 l/min

°CSt:

M002720-A

EGC 25 3. Description

[+]

Operating modes

DHW function: Access to sanitary hot water temperature parameter.

To increase a value

Access the selected menu or confirm a value modification

State heating pump

Heating programme deactivated: The heating function is deactivated

State DHW pump

DHW off

Manual mode

Flame output level

e r t y

System pressure

bar

Low output level 0 - 25 %

Average output level 25 - 50 %

High output level 50 - 75 %

Output level 75 - 100 %

Pressure indicator: The symbol is displayed next to the installation’s pressure value. If no water pressure sensor is connected, -.appears on the display

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)

rrr

ddd

1 2

SERVICE

°C°Fh barPsi % rpm kW uA x10 l/min

°CSt:

M002721-A

3. Description EGC 25

Other information

)

User menu: Parameters at user level can be changed

Information menu: Reading the various current values

Chimney-sweeping position: Forced full or part load for CO2 measurement

Service menu: Parameters at installer level can be changed

Display with the symbols: $ + K + Z (Maintenance message)

Hour counter menu: Readout of the operating hours, number of successful starts and hours on mains supply

Blocking: After 5 resets in under 1 hour, the appliance should be switched off and switched on again before resetting

Outside temperature sensor present

The symbol is displayed when the boiler pump is operating

Defect: Boiler indicates a fault. This is indicated by an E code and a flashing display

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EGC 25

4 Operating the appliance

4.1 Putting the appliance into operation

1. Check the water pressure in the installation shown on the control panel display.

If the water pressure is lower than 0,8 bar, more water should be added. If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2,0 bar).

2. Open the gas valve on the boiler.

3. Switch on the boiler.

4. The start-up cycle begins and cannot be interrupted. During the start-up cycle, the display shows the following information:

fK[xx pK[xx

The version numbers are displayed alternately.

5. A vent cycle of a duration of around 3 minutes is carried out automatically.

6. In standby mode, the screen usually displays 0, plus the water

pressure and the symbols d and r.

: Software version

: Parameter version

4. Operating the appliance

4.2 Reading out measured values

The following current values can be read off the information menu Q:

4 5t = State. 4 5v = Sub-status. 4 t1 = Flow temperature (°C). 4 t" = Return temperature (°C). 4 t3 = DHW tank temperature (°C). 4 t4 = Outside temperature (°C). 4 t5 = Solar boiler temperature (°C). 4 t6 = Solar panel temperature (°C). 4 5p = Internal set point (°C). 4 fl = Ionization current (µA). 4 Mf = Fan speed in rpm. 4 pr = Water pressure (bar (MPa)). 4 p; = Supplied relative heat output (%).

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)

bar

C003049-A

4. Operating the appliance

EGC 25

The current values can be read as follows:

1. Press the two f keys simultaneously. The symbol Q flashes.

2. Confirm using key S.

is displayed, alternating with the

current status 3 (for example).

3. Press the [+] key.

sub-status

(for example).

4. Press the [+] key.

flow temperature

is displayed, alternating with the current

°C (for example).

5. Press the [+] key successively to scroll down the various parameters.

t", t3, t4, t5, t6

6. Press the [+] key.

set point

°C (for example).

7. Press the [+] key.

ionization current

8. Press the [+] key.

fan rotation speed

9. Press the [+] key.

water pressure

is displayed, alternating with the internal

is displayed, alternating with the current

µA (for example).

is displayed, alternating with the current

3000

rpm (for example).

is displayed, alternating with the current

bar (for example). If no water pressure sensor

is connected, [-.-] appears on the display.

10.Press the [+] key.

modulation percentage

11.Press the [+] key. The readout cycle starts again with

is displayed, alternating with the current

% (for example).

12.Press the j key 2 times to return to the current operating mode.

4.3 Changing the settings

4.3.1. Parameter descriptions

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EGC 25 4. Operating the appliance

Factory

Parameter Description Adjustment range

Flow temperature: T

Domestic hot water temperature: T

Heating / DHW mode

ECO mode

Anticipation resistance

Display screen

Post-circulation of the pump

Brightness of display lighting

SET

20 to 90 °C

40 to 65 °C

0 = Heating deactivated / DHW deactivated 1 = Heating activated / DHW activated 2 = Heating activated / DHW deactivated 3 = Heating deactivated / DHW activated

0 = Comfort 1 = Energy-saving mode 2 = Management using a programmable thermostat

0 = No anticipation resistance for the ON/OFF thermostat 1 = Anticipation resistance for the ON/OFF thermostat

0 = Simple 1 = Comprehensive 2 = Automatic switching to simple after 3 minutes 3 = Automatic switching to simple after 3 minutes; Key blocking is

active

1 to 98 minutes 99 minutes = continuous

0 = Low 1 = High

setting

EGC 25

4.3.2. Modification of the user-level parameters

Parameters p1 to p8 can be modified by the user in order to meet central heating and DHW comfort needs.

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)

bar

C003050-A

4. Operating the appliance EGC 25

CAUTION

Modification of the factory settings may be detrimental to the functioning of the appliance.

1. Press the two keys f simultaneously and then key [+] until the symbol W flashes on the menu bar.

2. Select the users menu using the key S.

flashing.

is displayed with

p[1

3. Press the S key a second time. The value 80°C appears and flashes (for example).

4. Change the value by pressing the [-] or [+] key. In this example using key [-] to

5. Confirm the value with the S key.

°C.

is displayed with

p[1

flashing.

6. Press the j key 2 times to return to the current operating mode.

4 The parameters

same way as

are changed in the

. After step 2, use the [+] key to

move to the required parameter.

4 The parameters

temperature) and

(the maximum heating water

(the maximum drinking water

temperature) can also be modified using the quick selection menu.

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)

bar

C003051-A

bar

C003052-A

EGC 25

4. Operating the appliance

4.3.3. Setting the manual mode

In some cases it may be necessary to switch the boiler to manual operation, For example, if the controller has not yet been connected. The boiler can be switched to automatic or manual operation under the symbol m. To do this, proceed as follows:

1. Press the two keys f simultaneously and then key [+] until the symbol m flashes on the menu bar.

2. Press the S key:

The text

sensor is connected). The flow temperature is determined by the internal heating curve.

The value of the minimum flow temperature.

3. Press the [-] or [+] key to increase this value temporarily in manual operation.

4. Confirm the value with the S key. The boiler is now set to manual operation.

5. Press the j key 2 times to return to the current operating mode.

with the current water pressure (only if an outside

4.3.4. Changing the heating temperature

If using an outside temperature sensor, the heating flow temperature is adjusted automatically.

In summer, it is possible to reduce the heating flow temperature whilst maintaining comfort. To do this, proceed as follows:

1. Press the d key 1 times.

2. The symbol d and the current temperature are displayed (the temperature flashes, e.g.

°C).

3. Change the value by pressing the [-] or [+] key. In this example using key [-] to

°C.

4. To confirm, press the S key.

It also possible to modify this setting using the parameter

4.3.5. Modifying the domestic hot water

temperature setting

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It may be that a lower domestic hot water temperature will be sufficient for your needs. Reduce this temperature and save energy. To do this, proceed as follows:

C003053-A

C003912-A

4. Operating the appliance

EGC 25

1. Press the r key 1 times.

2. The symbol r and the current temperature are displayed (the temperature flashes, e.g.

°C).

3. Change the value by pressing the [-] or [+] key. In this example using key [-] to

°C.

4. To confirm, press the S key.

4.3.6. Modifying the domestic hot water set point

temperature

To modify the set point of the solar tank (if connected), proceed as follows

1. Press the r key for 3 seconds.

2. Symbols r and

(for example,

3. Change the value by pressing the [-] or [+] key. In this example using key [-] to

4. To confirm, press the S key.

and the current temperature are displayed

and the temperature 60°C flash).

°C.

4.4 Installation shutdown

4.5 Antifreeze protection

CAUTION

Do not switch off the boiler.

If the central heating system is not used for a long period, we recommend proceeeding as follows:

4 Press key d until OFF is displayed. 4 Press key r until OFF is displayed.

When the heating water temperature in the boiler is too low, the integrated boiler protection system starts up. This protection functions as follows:

4 If the water temperature is lower than 7°C, the heating pump starts

up.

4 If the water temperature is lower than 4°C, the boiler starts up.

4 If the water temperature is higher than 10°C, the boiler shuts down

and the circulation pump continues to run for a short time.

4 If the water temperature in the storage tank is less than 4°C, it is

reheated to its set point.

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T001507-B

EGC 25

5 Checking and maintenance

5.1 General instructions

The boiler does not require a lot of maintenance. Nevertheless, we recommend having the boiler inspected and serviced at regular intervals.

4 Maintenance and cleaning of the boiler must be carried out at least

once a year by a qualified technician.

4 Have the flues swept at least once a year or more, depending on

the regulations in force in your country.

CAUTION

4 Maintenance operations must be done by a qualified

engineer.

4 We recommend taking out a maintenance contract.

4 Only original spare parts must be used.

4 Make certain that the flues and chimneys are

connected, in good condition and not blocked.

4 Do not modify nor block the condensate outlet(s).

4 If a neutralisation system is installed, follow the

instructions delivered with the neutralisation system for cleaning and servicing of this system.

5. Checking and maintenance

5.2 Periodic checks

4 Check the water pressure in the installation (Menu

INFORMATION).

If the water pressure is lower than 0,8 bar, more water should be added. If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2,0 bar).

4 Carry out a visual check for the presence of any water leaks.

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T000181-B

5. Checking and maintenance EGC 25

4 Open and close the radiator valves several times a year (this

prevents the valves from seizing up).

4 Clean the outside of the boiler using a damp cloth and a light

detergent.

CAUTION

Only a qualified professional is authorised to clean the inside of the boiler.

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M002722-A

EGC 25 6. Troubleshooting

6 Troubleshooting

6.1 Error messages (Sub-status 9)

To display the current error code, proceed as follows:

1. Press the two f keys simultaneously. The symbol Q flashes.

2. Confirm using key S.

current status 3 (for example).

is displayed, alternating with the

3. Press the [+] key. The display shows

value (

Code

Su:00 The PSU PCB is incorrectly configured Parameter error on the PSU PCB

Su:01 Maximum flow temperature exceeded The water flow in the installation is insufficient

Su:02 The increase in flow temperature has

Su:07 Maximum difference between the flow

Su:08 The RL inlet on the PCU PCB terminal

Description Checking / solution

4 Contact the professional who takes care of maintenance of the

appliance

4 Check the circulation (direction, pump, valves)

The water flow in the installation is insufficient

exceeded its maximum limit

and return temperature exceeded

block is open

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Sensor error

4 Contact the professional who takes care of maintenance of the

appliance

The water flow in the installation is insufficient

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Sensor error

4 Contact the professional who takes care of maintenance of the

appliance

Parameter error

4 Contact the professional who takes care of maintenance of the

appliance

Bad connection

, for example) alternately.

and the current error

4 Contact the professional who takes care of maintenance of the

appliance

Su:09 Live/neutral inversion Parameter error

4 Contact the professional who takes care of maintenance of the

appliance

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6. Troubleshooting EGC 25

Code Description Checking / solution

Su:10 Su:11

The BL inlet on the PCU PCB terminal block is open

The contact connected to the BL inlet is open

4 Contact the professional who takes care of maintenance of the

appliance

Parameter error

4 Contact the professional who takes care of maintenance of the

appliance

Bad connection

4 Contact the professional who takes care of maintenance of the

appliance

Su:13 Communication error with the SCU

PCB

Bad connection

4 Contact the professional who takes care of maintenance of the

appliance

SCU PCB not installed in the boiler

4 Contact the professional who takes care of maintenance of the

appliance

Su:14 The water pressure is lower than 0,8

bar

Not enough water in the circuit

4 Top up the installation with water

Su:15 Gas pressure too low Incorrect setting of the gas pressure switch on the SCU PCB

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of the

appliance

Su:16 The SU PCB is not recognised Wrong SU PCB for this boiler

4 Contact the professional who takes care of maintenance of the

appliance

Su:17 The parameters saved on the PCU

PCB are impaired

Parameter error on the PCU PCB

4 Contact the professional who takes care of maintenance of the

appliance

Su:18 The PSU PCB is not recognised Wrong PSU PCB for this boiler

4 Contact the professional who takes care of maintenance of the

appliance

Su:19 The boiler has not been configured The PSU PCB has been changed

4 Contact the professional who takes care of maintenance of the

appliance

Su:21 Communication error between the

PCU and SU PCBs

Bad connection

4 Contact the professional who takes care of maintenance of the

appliance

Su:22 No flame during operation No ionization current

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of the

appliance

Su:25 Internal error on the SU PCB

4 Contact the professional who takes care of maintenance of the

appliance

Su:28 An HL tank is detected whilst the boiler

cannot control it. This message disappears after 10 seconds if the boiler can control the

4 Wait for 10 seconds to see whether the error persists

4 Contact the professional who takes care of maintenance of the

appliance

HL tank

Su:29 Communication error between the

PCU and SCU-s191 PCBs

Bad connection

4 Contact the professional who takes care of maintenance of the

appliance

Su:30 Communication error between the

SCU-s191 PCBs and the solar control system

Bad connection

4 Contact the professional who takes care of maintenance of the

appliance

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EGC 25 6. Troubleshooting

Code Description Checking / solution Su:31 The TAS is in open circuit The Titan Active System® is on an open circuit

4 Contact the professional who takes care of maintenance of the

appliance

Remarks: Domestic hot water production is stopped but may nevertheless be restarted for 72 hours after the boiler is switched off. The tank is no longer protected. If a tank without Titan Active System® is connected to the boiler, check that the TAS simulation connector is fitted to the SCU-s191 PCB.

Su:32 The TAS is short circuited The Titan Active System® is short-circuited

4 Contact the professional who takes care of maintenance of the

appliance

Su:33 The header sensor in the solar control

system is defective

Su:34 The sensor in the solar tank is defective Bad connection

Bad connection Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

Sensor fault

6.2 Faults (type code Exx)

Code

e00

e01

Cause of the fault

PCU PSU PCB not connected Bad connection

PCU The safety parameters are

Description Checking / solution

incorrect

4 Contact the professional who takes care of maintenance of the

appliance

In the event of an operating fault, the control panel flashes and displays a code.

1. Make a note of the code displayed. The code is important for the correct and rapid diagnosis of the type of failure and for any technical assistance that may be needed.

2. Press the t key. If the code is displayed again, switch off the boiler and then switch it back on.

PSU PCB faulty

4 Contact the professional who takes care of maintenance of the

appliance

Bad connection PSU PCB faulty

e02

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PCU The boiler flow sensor has short-

circuited

4 Contact the professional who takes care of maintenance of the

appliance

Bad connection Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

6. Troubleshooting EGC 25

Code Cause of

the fault

e03

e04

e05

e06

PCU The boiler flow sensor is on an

PCU Boiler temp too low Bad connection

PCU Boiler temperature too high Bad connection

PCU The return temperature sensor has

Description Checking / solution

Bad connection

open circuit

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Bad connection

short-circuited

Sensor fault

e07

e08

e09

e10

4 Contact the professional who takes care of maintenance of the

appliance

PCU The return temperature sensor is

on an open circuit

Bad connection Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

PCU Return temperature too low Bad connection

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

PCU Return temperature too high Bad connection

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

PCU Difference between the flow and

return temperatures insufficient

Bad connection Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

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EGC 25 6. Troubleshooting

Code Cause of

the fault

e11

e12

e14

PCU Difference between the flow and

PCU Maximum boiler temperature

PCU 5 burner start-up failures No ignition

Description Checking / solution

Bad connection

return temperatures too great

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

Bad connection exceeded (STB thermostat maximum)

Sensor fault

4 Contact the professional who takes care of maintenance of the

appliance

No water circulation

4 Vent the air in the heating system

4 Check the circulation (direction, pump, valves)

4 Check the water pressure

4 Contact the professional who takes care of maintenance of the

appliance

Ignition arc, but no flame formation

e16

e17

e34

e35

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of the

appliance

Presence of the flame but insufficient ionization (<3 µA)

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of the

appliance

PCU Detection of a parasite flame Ionization current present even though there is no flame

Ignition transformer defective

Gas valve defect

The burner remains very hot: CO2 too high

4 Contact the professional who takes care of maintenance of the

appliance

PCU Internal error on the SU board Bad connection

SU PCB faulty

4 Contact the professional who takes care of maintenance of the

appliance

PCU The fan is not running at the right

speed

Bad connection

Fan defective

4 Contact the professional who takes care of maintenance of the

appliance

PCU Flow and return reversed Bad connection

Sensor fault

e36

PCU The flame went out more than 5

times in 24 hours while the burner was operating

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4 Contact the professional who takes care of maintenance of the

appliance

Water circulation direction reversed

4 Check the circulation (direction, pump, valves)

No ionization current

4 Check that the gas valve is fully opened

4 Contact the professional who takes care of maintenance of the

appliance

6. Troubleshooting EGC 25

Code Cause of

the fault

e37

e38

e39

e40

PCU Communication failure with the

PCU Communication failure between

PCU The BL inlet is open Parameter incorrectly set

PCU HRU/URC unit test error Bad connection

Description Checking / solution

Bad connection SU PCB

4 Contact the professional who takes care of maintenance of the

appliance

Bad connection the PCU and SCU PCBs

SCU PCB not connected or faulty

4 Contact the professional who takes care of maintenance of the

appliance

Bad connection

External cause

4 Contact the professional who takes care of maintenance of the

appliance

External cause

4 Contact the professional who takes care of maintenance of the

appliance

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EGC 25 7. Technical specifications

7 Technical specifications

7.1 Technical specifications

Boiler type EGC 25

General

Nominal output (Pn) Heating System (80/60 °C)

Nominal output (Pn) Heating System (50/30 °C)

Nominal output (Pn) Heating System (40/30 °C)

Nominal input (Qn) Heating System (Hi)

Nominal input (Qn) Heating System (Hs)

Nominal input (Qnw) DHW System (Hi)

Nominal input (Qnw) DHW System (Hs)

Heating efficiency under full load (Hi) (80/60 °C) - % 96,3

Heating efficiency under full load (Hi) (50/30 °C) - % 102,0

Heating efficiency under partial load (Hi) (Return temperature 60°C) - % 96,1

Heating efficiency under partial load (EN 92/42) (Return temperature 30°C)

Data on the gases and combustion gases

Gas consumption - Natural gas H (G20) minimum-maximum

Gas consumption - Natural gas L (G25) minimum-maximum

Gas consumption - Propane G31 minimum-maximum

NOx-Emission (Scrolls forward EN297A3)

Mass flue gas flow rate minimum-maximum kg/h 8,9 - 49,3

Flue gas temperature minimum-maximum °C 30 - 80

Maximum counter pressure

Characteristics of the heating circuit

Water content (ex expansion vessel)

Water operating pressure minimum kPa (bar (MPa)) 80 (0,8)

Water operating pressure (PMS) maximum kPa (bar (MPa)) 300 (3,0)

Water temperature maximum °C 110

Operating temperature maximum °C 90

Electrical characteristics

Power supply voltage

Power consumption - Pump position high - Fastest maximum W 141

Power consumption - Pump position low - Slowest maximum W 78

Power consumption - Standby maximum W 4

Electrical protection index

Other characteristics

Weight (empty)

minimum-maximum kW 5,0 - 24,1

minimum-maximum kW 5,6 - 25,5

minimum-maximum kW 5,6 - 25,9

minimum-maximum kW 5,2 - 25,0

minimum-maximum kW 5,8 - 27,8

minimum-maximum kW 5,2 - 29,3

minimum-maximum kW 5,8 - 32,6

- % 108,0

0,55 - 3,10

0,64 - 3,61

0,21 - 1,20

IP21

m3/h

mg/kWh 38

Pa 120

l 1,9

VAC 230

kg 50

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8. Energy savings

8 Energy savings

8.1 Energy-saving advice

EGC 25

4 Keep the room in which the boiler is installed well ventilated.

4 Do not block ventilation outlets.

4 Do not cover the radiators. Do not hang curtains in front of the

radiators.

4 Install reflective panels behind the radiators to prevent heat

losses.

4 Insulate the pipes in rooms that are not heated (cellars and lofts).

4 Close the radiators in rooms not in use.

4 Do not run hot (or cold) water pointlessly.

4 Install a water-saving shower head to save up to 40 % energy.

4 Take showers rather than baths. A bath consumes twice as much

water and energy.

8.2 Recommendations

The remote control is available in the following versions:

4 Wire

4 Radio

The setting of the control panel and/or of the remote control has a considerable influence on energy consumption.

A few tips:

4 In the room in which the room thermostat is installed, it’s advised

not to use thermostatic valve radiators. If a thermostatic valve is used the valve must be fully opened.

4 Completely closing and opening thermostatic valve radiators

causes undesirable temperature fluctuations. Open and close thermostatic valves in small steps.

4 Lower the temperature to around 20°C. This reduces heating costs

and energy consumption.

4 Lower the temperature when you air the rooms.

4 When setting a time schedule , bear days when you are absent

and holidays in mind.

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EGC 25

9 Warranty

9.1 General

9.2 Warranty terms

9. Warranty

You have just purchased one of our appliances and we thank you for the trust you have placed in our products.

Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained.

Your installer and our customer support network are at your disposal at all times.

The following provisions are not exclusive of the buyer being able benefit from the legal provisions applicable regarding hidden defects in the buyer’s country.

Starting from the purchase date shown on the original installer’s invoice, your appliance has a contractual guarantee against any manufacturing defect.

The length of the guarantee is mentioned in the price catalogue. The manufacturer is not liable for any improper use of the appliance or failure to maintain or install the unit correctly (the user shall take care to ensure that the system is installed by a qualified engineer).

In particular, the manufacturer shall not be held responsible for any damage, loss or injury caused by installations which do not comply with the following:

4 applicable local laws and regulations,

4 specific requirements relating to the installation, such as national

and/or local regulations,

4 the manufacturer’s instructions, in particular those relating to the

regular maintenance of the unit,

4 the rules of the profession.

The warranty is limited to the exchange or repair of such parts as have been recognised to be faulty by our technical department and does not cover labour, travel and carriage costs.

The warranty shall not apply to the replacement or repair of parts damaged by normal wear and tear, negligence, repairs by unqualified parties, faulty or insufficient monitoring and maintenance, faulty power supply or the use of unsuitable fuel.

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Sub-assemblies such as motors, pumps, electric valves etc. are guaranteed only if they have never been dismantled.

The legislation laid down by european directive 99/44/EEC, transposed by legislative decree No. 24 of 2 February 2002 published in O.J. No. 57 of 8 March 2002, continues to apply.

AD001NU-AJ

DUEDI S.r.l.

DE DIETRICH SERVICE

BDR Thermea (Czech republic) s.r.o

www.duediclima.it

www.dedietrich.cz

Distributore Ufficiale Esclusivo

De Dietrich-Thermique Italia

www.dedietrich-heiztechnik.com

Freecall 0800 / 201608

Jeseniova 2770/56

130 00 Praha 3

+49 (0)25 72 / 9161-0

+49 (0)25 72 / 9161-102

info@remeha.de

Via Passatore, 12 - 12010 San Defendente di Cervasca CUNEO

+39 0171 857170 +39 0171 687875 info@duediclima.it

+420 271 001 627 info@dedietrich.cz

DE DIETRICH THERMIQUE Iberia S.L.U.

www.dedietrich-calefaccion.es

C/Salvador Espriu, 11

08908 L’HOSPITALET de LLOBREGAT

+34 935 475 850 info@dedietrich-calefaccion.es

129164, Россия, г. Москва

Зубарев переулок, д. 15/1

Бизнес-центр «Чайка Плаза»,

офис 309

+7 (495) 221-31-51

DE DIETRICH THERMIQUE S.A.S

7605610-001-017605636-001-01

300026081-001-04

7605633-001-017605646-001-01

300026082-001-02

DEDIETRICH THERMIQUE 57,ruedelaGareF-67580MERTZWILLER-BP 30

© Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing.

03/12/2013

DE DIETRICH TWINEO EGC 25 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual