DeDietrich MCR 24 User manual

Vivadens EN
Wall-hung gas condensing boilers
MCR 24/28 BIC
User Guide
300024112-001-01

Contents
1 Introduction ................................................................................................4
1.1 Symbols used .......................................................4
1.2 Abbreviations ........................................................4
1.3 General ..................................................................4
1.3.1 Manufacturer’s liability .............................................4
1.3.2 Installer’s liability .....................................................5
1.3.3 User’s liability ..........................................................5
1.4 Homologations ......................................................6
1.4.1 Certifications ...........................................................6
2Safety instructions and recommendations ..............................................7
2.1 Safety instructions ...............................................7
2.2 Recommendations ................................................8
3Description ..................................................................................................9
3.1 General description ..............................................9
3.2 Control panel .........................................................9
4Operating the appliance ..........................................................................11
4.1 Starting and stopping the boiler .......................11
4.1.1 Start the boiler .......................................................11
4.1.2 Stopping the boiler ................................................12
4.2 Changing the settings ........................................13
4.2.1 Changing the heating temperature ........................13
4.2.2 Modifying the comfort setting (ECO) .....................13
4.2.3 Stopping the central heating or activating the Summer
mode .....................................................................14
4.2.4 Changing the domestic hot water
temperature ...........................................................15
4.2.5 Stopping domestic hot water production ...............16
4.2.6 Other settings ........................................................16
4.3 Prolonged absence .............................................17
4.3.1 Installation shutdown .............................................17
4.3.2 Turning on the antifreeze function .........................17
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4.4 Reading out measured values ...........................18
5 Checking and maintenance .....................................................................19
5.1 General instructions ...........................................19
5.2 Periodic checks ..................................................19
5.3 Filling the system ...............................................20
5.4 Bleeding the heating system .............................21
6 Troubleshooting .......................................................................................24
6.1 Error codes ..........................................................24
6.1.1 e01 - e02 - e07 - e09 ......................24
6.1.2 e04 ...................................................................24
6.1.3 Other error codes ..................................................24
6.1.4 Before contacting the installer ...............................25
6.2 Incidents and solutions ......................................25
7 Technical specifications ..........................................................................27
7.1 Technical specifications ....................................27
8 Energy savings .........................................................................................29
8.1 Energy savings ...................................................29
8.1.1 Energy-saving advice ............................................29
8.1.2 Room thermostat and settings ..............................29
9 Warranty ....................................................................................................31
9.1 General ................................................................31
9.2 Warranty terms ...................................................31
Contents
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3170513 - 300024112-001-01

1 Introduction
1.1 Symbols used
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.
1.2 Abbreviations
4DHW: Domestic hot water.
4IRC: Interactive remote control.
4CRC: Communicating remote controller.
4Hi: Lower heating value LHV (Nett).
4Hs: Higher heating value HHV (Gross).
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.
MCR 24/28 BIC 1. Introduction
170513 - 300024112-001-01 4

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:
4Failure to abide by the instructions on using the appliance.
4Faulty or insufficient maintenance of the appliance.
4Failure to abide by the instructions on installing the appliance.
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:
4Read and follow the instructions given in the manuals provided
with the appliance.
4Carry out installation in compliance with the prevailing legislation
and standards.
4Perform the initial start up and carry out any checks necessary.
4Explain the installation to the user.
4If a maintenance is necessary, warn the user of the obligation to
check the appliance and maintain it in good working order.
4Give 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:
4Read and follow the instructions given in the manuals provided
with the appliance.
4Call on qualified professionals to carry out installation and initial
start up.
4Get your installer to explain your installation to you.
4Have the required checks and services done.
4Keep 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.
1. Introduction MCR 24/28 BIC
5170513 - 300024112-001-01

1.4 Homologations
1.4.1. Certifications
CE identification no PIN 0063BQ3009
NOx < 60 mg/kWh
MCR 24/28 BIC 1. Introduction
170513 - 300024112-001-01 6

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:
4The temperature of the flue gas conduits may exceed
60°C.
4The temperature of the radiators may reach 85°C.
4The temperature of the domestic hot water may reach
65°C.
CAUTION
Do not neglect to service the appliance:
4For completely safe and optimum operation, you
must have your boiler regularly serviced by an
approved installer.
2. Safety instructions and recommendations MCR 24/28 BIC
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2.2 Recommendations
WARNING
Only qualified professionals are authorised to work on the
appliance and the installation.
4Regularly check the water pressure in the installation (minimum
pressure 0,8 bar, recommended pressure between 1,5 and 2,0
bar).
4Keep the appliance accessible at all times.
4Never 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.
4The appliance should be on Summer or Antrifreeze mode rather
than switched off to guarantee the following functions:
-Anti blocking of pumps
-Antifreeze protection
MCR 24/28 BIC 2. Safety instructions and recommendations
170513 - 300024112-001-01 8

3 Description
3.1 General description
Wall-hung gas condensing boilers
4Heating and domestic hot water production with integrated DHW
tank.
4High efficiency heating.
4Low pollutant emissions.
4Installation and connection facilitated by the mounting frame
delivered with the appliance.
4Flue gas discharge via a forced flue, chimney, bi-flow or 3CE type
connection.
3.2 Control panel
AMenu key
BDisplay
CMain ON/OFF switch
DPressure gauge
ESweep key
F( or RESET key
GHeating temperature key or -
HDHW temperature key or +
JSERVICE or U key
3. Description MCR 24/28 BIC
9170513 - 300024112-001-01

The display indicates the state of the boiler and any errors. The
symbols located above the function keys indicate their current
function.
Pressing on any key will display the current status of the boiler and
the current command code. If there is a fault, the corresponding code
continues to be displayed.
MCR 24/28 BIC 3. Description
170513 - 300024112-001-01 10

4 Operating the appliance
4.1 Starting and stopping the boiler
4.1.1. Start the boiler
1. Check the water pressure in the installation.
2. Open the gas valve.
3. Throw the boiler’s ON / OFF switch.
4. The start-up cycle begins. It lasts 2 minutes and cannot be
interrupted.
During the start-up cycle, the display shows the following
information:
fK[xx: Software version
pK[xx: Parameter version
The version numbers are displayed alternately.
5. When the start-up cycle is finished, the display shows 0. The
boiler is now operational.
T000164-B
A000785-A
A000787-A
4. Operating the appliance MCR 24/28 BIC
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4.1.2. Stopping the boiler
1. Throw the boiler’s ON / OFF switch.
2. Switch off the boiler electrical power supply.
3. Close the gas valve.
A000786-A
T000179-A
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4.2 Changing the settings
4.2.1. Changing the heating temperature
If an outside temperature sensor or an OpenTherm control
system is fitted, 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.
The symbol D and the current temperature are displayed.
2. Use the [+] and [-] keys to change the parameter value.
3. To confirm the new value, press the key S.
It also possible to modify this setting using the parameter
p1. ¼See chapter: "Other settings", page 16.
4.2.2. Modifying the comfort setting (ECO)
The user can consult or modify the following 3 settings:
4ON = Activation of the energy-saving setting.
4OFF = Activation of the comfort setting.
4AUTO = Setting dependent on the control unit (Factory setting).
1. Press the f key 1 times. The symbol Q flashes.
2. Press the f key a second time. The symbol ECO flashes.
3. To confirm, press the S key.
4. The current operating status is shown on the display:AUTO.
5. Use the + and - keys to change the parameter value.
6. To confirm, press the S key.
7. Press the > key 2 times to return to the current operating
mode.
It also possible to modify this setting using the parameter
p4. ¼See chapter: "Other settings", page 16.
T000147-A
GA,
HF,
Ajj
2x
T000148-B
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4.2.3. Stopping the central heating or activating
the Summer mode
1. Press the D key.
The symbol D and the current temperature are displayed.
2. Press the key [-] several times until the value 0ff is displayed.
3. To confirm the new value, press the key S.
The symbol C appears.
4It also possible to modify this setting using the
parameter p3. ¼See chapter: "Other settings",
page 16.
4Domestic hot water production is maintained.
HF,
Ajj
T000141-A
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4.2.4. Changing the domestic hot water
temperature
1. Press the N key.
The symbol N and the current temperature are displayed.
2. Use the [+] and [-] keys to change the parameter value.
3. To confirm the new value, press the key S.
It also possible to modify this setting using the parameter
p2. ¼See chapter: "Other settings", page 16.
T000143-A
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4.2.5. Stopping domestic hot water production
1. Press the N key.
The symbol N and the current temperature are displayed.
2. Press the key [-] several times until the value 0ff is displayed.
3. To confirm the new value, press the key S.
The symbol T appears.
It also possible to modify this setting using the parameter
p3. ¼See chapter: "Other settings", page 16.
4.2.6. Other settings
Parameter Description Adjustment range Factory setting
p1 Flow temperature 20 to 85 °C 75 °C
p2 Domestic hot water temperature 40 to 65 °C 60 °C
p3 Heating / DHW mode
0 = Heating deactivated (C) / DHW deactivated (T)
1
1 = Heating activated (D) / DHW activated (N)
2 = Heating activated (D) / DHW deactivated (T)
3 = Heating deactivated (C) / DHW activated (N)
p4 ECO mode
0 = Comfort mode
01 = Energy-saving mode
2 = Management using a programmable thermostat
p5 Anticipation resistance 0 = No anticipation resistance for the ON/OFF thermostat 0
1 = Anticipation resistance for the ON/OFF thermostat
p6 Display screen
0 = The screen stays off
2
1 = The screen stays on
2 = The screen switches off automatically after 3 minutes
GA,
Ajj
T000142-A
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To change these parameters, proceed as follows:
1. Press key f several times until the symbol W flashes on the menu
bar.
2. Press the S key to enter the "User" menu.
The symbol p[1 appears.
3. Use the + and - keys to select to parameter to be changed.
4. Press the S key to display the parameter value selected.
5. Use the + and - keys to change the parameter value.
6. To confirm the new value, press the key S.
The name of the modified parameter is displayed.
7. If necessary, set other parameters by selecting them using the +
or - keys.
8. To exit the User menu, press the > key 2 times.
If no selections are made in the various modes for 10
minutes, the boiler resumes the settings prior to
manipulation.
4.3 Prolonged absence
4.3.1. Installation shutdown
If the central heating system is not used for a long period, we
recommend switching the boiler off.
1. Switch the boiler off.
2. Switch off the boiler electrical power supply.
3. Close the gas valve.
4. Ensure that the boiler and system are protected against frost
damage.
4.3.2. Turning on the antifreeze function
We recommend setting the boiler thermostat to a value off 10°C if
using a classic installation.
Set the boiler to ECO mode using parameter p4, this action will
switch off the standby setting.
Installation and room antifreeze protection is guaranteed if you are
absent.
2x
3x
T000307-A
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If the temperature of the central heating water in the boiler falls too
much, the integrated protection device switches itself on:
4If the water temperature is lower than 7°C, the circulating pump is
activated.
4If the water temperature is lower than 3°C, the boiler is activated.
4When the water temperature is above 10 °C, the boiler is switched
off and the circulation pump runs for another 15 minutes.
CAUTION
This function is a protection device for the boiler only, not
for the system or buiding fabric.
CAUTION
If a room thermostat, connected via connectors 7 and 8,
is activated, the boiler will operate permanently until it
reaches the flow setting point.
4.4 Reading out measured values
The following values can be displayed in the information menu Q:
4t1 = Flow temperature (°C)
4t2 = Return temperature (°C)
4t3 = DHW sensor temperature (°C)
This temperature is used only for internal management in DHW
mode. During DHW draw-off, this value does not correspond to
the actual DHW outlet temperature (it is always lower).
4t4 = Outside temperature (°C)
4fl = Ionization current (μA)
4Mf = Fan speed (rpm)
1. Press the f key. The symbol Q flashes.
2. To access the parameters, press key S.
3. Press the [+] key successively to scroll down the various
parameters.
4. Press the > key 2 times to return to the current operating mode
T000138-A
MCR 24/28 BIC 4. Operating the appliance
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5 Checking and maintenance
5.1 General instructions
CAUTION
4An annual inspection is compulsory.
4We recommend taking out a maintenance contract.
4Maintenance operations must be done by a qualified
engineer.
4Only original spare parts must be used.
4Make certain that the flues and chimneys are
connected, in good condition and not blocked.
4Do not modify nor block the condensate outlet(s).
4If a neutralisation system is installed, follow the
instructions delivered with the neutralisation system
for cleaning and servicing of this system.
5.2 Periodic checks
4Check the water pressure in the installation. If the water pressure
is too low, add more water to the installation. ¼See chapter:
"Filling the system", page 20.
4Carry out a visual check for the presence of any water leaks.
4Open and close the radiator valves several times a year (this
prevents the valves from seizing up).
1
2
3
4
T000181-B
5. Checking and maintenance MCR 24/28 BIC
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