Manual De Dietrich Vivadens MCR 24-28 MI (page 29 of 36) (English)

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Vivadens

Wall-hung gas condensing boilers

MCR 24

MCR 24/28 MI

MCR 30/35 MI

MCR 34/39 MI

User Guide

300015874-001-01

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

2 Safety instructions and recommendations ..............................................7

2.1 Safety instructions ...............................................7

2.2 Recommendations ................................................8

3 Description ..................................................................................................9

3.1 General description ..............................................9

3.2 Main parts ..............................................................9

3.3 Control panel .......................................................10

4 Operating the appliance ..........................................................................11

4.1 Start the boiler ....................................................11

4.2 Reading out measured values ...........................12

4.3 Changing the settings ........................................13

4.3.1 Changing the heating temperature ........................13

4.3.2 Changing the domestic hot water

temperature ...........................................................14

4.3.3 Modifying the comfort setting (ECO) .....................14

4.3.4 Stopping the central heating or activating the Summer

mode .....................................................................15

4.3.5 Stopping domestic hot water production ...............16

4.3.6 Other settings ........................................................16

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4.4 Installation shutdown .........................................17

4.5 Turning on the antifreeze function ....................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

5.5 Draining the installation .....................................24

6 Troubleshooting .......................................................................................25

6.1 Error codes ..........................................................25

6.1.1 ..............................................................................25

6.1.2 ..............................................................................25

6.1.3 Other error codes ..................................................25

6.1.4 Before contacting the installer ...............................25

6.2 Incidents and solutions ......................................26

7 Technical specifications ..........................................................................28

7.1 Technical specifications ....................................28

8 Energy savings .........................................................................................30

8.1 Energy savings ...................................................30

8.1.1 Energy-saving advice ............................................30

8.1.2 Room thermostat and settings ..............................30

9 Warranty ....................................................................................................32

9.1 General ................................................................32

9.2 Warranty terms ...................................................32

Contents

160513 - 300015874-001-01

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

4 DHW: Domestic hot water.

4 IRC: Interactive remote control.

4 CRC: Communicating remote controller.

4 Hi: Lower heating value LHV (Nett).

4 Hs: 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 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

1. Introduction

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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.

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:

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.

1. Introduction

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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1.4 Homologations

1.4.1. Certifications

CE identification no

PIN 0063BQ3009

NOx < 70 mg/kWh

Type of connection Chimney: B

23P

Flue gas outlet: C

, C

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 1. Introduction

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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.

2. Safety instructions and recommendations MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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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 1,5 and 2,0

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

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 2. Safety instructions and recommendations

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3 Description

3.1 General description

Wall-hung gas condensing boilers

4 MCR 24 - Heating only.

4 MCR ../.. MI - Heating and instantaneous domestic hot water

production.

4 Low pollutant emissions.

4 Flue gas discharge via a forced flue, chimney, bi-flow or 3CE type

connection.

The MCR 24 boiler can be connected to a 80 or 130 litre tank to

produce domestic hot water.

3.2 Main parts

Automatic air vent

Flue gas discharge pipe / Combustive air

Outlet for measuring combustion gases

Heat exchanger

Air/gaz canal

Fan air inlet

Gas block

Display

Control panel

Pressure gauge

Circulating pump

Ignition transformer

Expansion vessel heating circuit

(Except MCR 34/39 MI model )

Ignition/ionization electrode

Stand-off frame (optional), Mounting frame, delivered with

the boiler

Water pressure sensor

T004250-A

3. Description MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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3.3 Control panel

Menu key

Display

Main ON/OFF switch

Pressure gauge

Sweep key

( or RESET key

Heating temperature key or -

DHW temperature key or +

SERVICE or U key

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 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 3. Description

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4 Operating the appliance

4.1 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

. The

boiler is now operational.

T000164-B

A000785-A

A000787-A

4. Operating the appliance

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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4.2 Reading out measured values

The following values can be displayed in the information menu Q:

4 t1 = Flow temperature (°C)

4 t2 = Return temperature (°C)

4 t3 = Domestic hot water temperature (°C)

4 t4 = Outside temperature (°C)

fl = Ionization current (μA)

4 Mf = Fan speed (rpm)

1. Press the

key. The symbol

flashes.

2. To access the parameters, press key

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 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 4. Operating the appliance

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4.3 Changing the settings

4.3.1. 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

key.

The symbol

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

It also possible to modify this setting using the parameter

See chapter: "Other settings", page 16.

T000147-A

GA,

HF,

4. Operating the appliance MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

160513 - 300015874-001-01

4.3.2. Changing the domestic hot water

temperature

1. Press the

key.

The symbol

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

It also possible to modify this setting using the parameter

See chapter: "Other settings", page 16.

4.3.3. Modifying the comfort setting (ECO)

The user can consult or modify the following 3 settings:

4 ON = Activation of the energy-saving setting.

4 OFF = Activation of the comfort setting.

4 AUTO = Setting dependent on the control unit (Factory setting).

1. Press the

key 1 times. The symbol

flashes.

2. Press the

key a second time. The symbol ECO flashes.

3. To confirm, press the

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

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.

T000143-A

Ajj

T000148-B

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 4. Operating the appliance

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4.3.4. Stopping the central heating or activating

the Summer mode

1. Press the

key.

The symbol

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

The symbol

appears.

4 It also possible to modify this setting using the

parameter p3. ¼See chapter: "Other settings",

page 16.

4 Domestic hot water production is maintained.

HF,

Ajj

T000141-A

4. Operating the appliance MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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4.3.5. Stopping domestic hot water production

1. Press the

key.

The symbol

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

The symbol

appears.

It also possible to modify this setting using the parameter

p3. ¼See chapter: "Other settings", page 16.

4.3.6. Other settings

Parameter

Description Adjustment range

Factory setting

MCR 24

MCR 24/28

MCR 30/35

MCR 34/39

Flow temperature 20 to 85 °C 75 °C 75 °C 75 °C 75 °C

Domestic hot water

temperature

40 to 65 °C 55 °C 55 °C 55 °C 55 °C

Heating / DHW mode

0 = Heating deactivated (C) / DHW

deactivated (T)

2 1 1 1

1 = Heating activated (D) / DHW

activated (N)

2 = Heating activated (D) / DHW

deactivated (T)

3 = Heating deactivated (C) / DHW

activated (N)

GA,

Ajj

T000142-A

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 4. Operating the appliance

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Parameter Description Adjustment range

Factory setting

MCR 24

MCR 24/28

MCR 30/35

MCR 34/39

ECO mode

0 = Comfort mode

2 2 2 2

1 = Energy-saving mode

2 = Management using a programmable

thermostat

Anticipation resistance

0 = No anticipation resistance for the ON/

OFF thermostat

0 0 0 0

1 = Anticipation resistance for the ON/

OFF thermostat

Display screen

0 = The screen stays off

2 2 2 2

1 = The screen stays on

2 = The screen switches off automatically

after 3 minutes

To change these parameters, proceed as follows:

1. Press key

several times until the symbol

flashes on the menu

bar.

2. Press the

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

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

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.

4.4 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.

T000307-A

4. Operating the appliance

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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4.5 Turning on the antifreeze function

We recommend setting the boiler thermostat to a value off 10°C if

using a classic installation.

Define parameter p4 as 1 (energy-saving mode), the heat

retention function will be deactivated.

Installation and room antifreeze protection is guaranteed if you are

absent.

If the temperature of the central heating water in the boiler falls too

much, the integrated protection device switches itself on:

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

activated.

4 If the water temperature is lower than 3°C, the boiler is activated.

4 When 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.

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 4. Operating the appliance

160513 - 300015874-001-01

5 Checking and maintenance

5.1 General instructions

CAUTION

4 An annual inspection is compulsory.

4 We recommend taking out a maintenance contract.

4 Maintenance operations must be done by a qualified

engineer.

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.

5.2 Periodic checks

4 Check 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.

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

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

prevents the valves from seizing up).

T000181-B

5. Checking and maintenance MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

160513 - 300015874-001-01

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.

5.3 Filling the system

The water pressure in the boiler must be between 1,5 and 2 bar. Add

water to the installation if necessary. To do this, proceed as follows:

1. Open the valves on all radiators connected to the heating system.

2. Set the room thermostat to as low a temperature as possible.

3. Switch off the boiler electrical power supply.

T000181-B

T000182-A

T000155-A

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

5. Checking and maintenance

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4. Wait until the temperature drops below 40°C and the radiators

seem cold before filling the central heating system.

5. Open the disconnector valves.

6. Close the disconnector valves when the manometer indicates a

pressure of 2 bar.

7. After filling the installation, switch the boiler on.

8. Set the room thermostat or the regulator.

9. Set the radiator valves.

CAUTION

Filling and bleeding the installation 2 times a year should

be sufficient to obtain an adequate hydraulic pressure. If

it is often necessary to top up the installation with water,

contact your fitter.

5.4 Bleeding the heating system

It is essential that you bleed any air in the calorifier, the conduits or

the taps to prevent the annoying noises likely to be produced during

heating or when tapping water. To do this, proceed as follows:

1. Open the valves on all radiators connected to the heating system.

T000185-A

T000136-A

2 bar

T000137-A

T000181-B

5. Checking and maintenance

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

160513 - 300015874-001-01

2. Set the room thermostat as high as possible.

3. Wait until the radiators are hot.

4. Switch the boiler off.

5. Wait around 10 minutes until the radiators are cold.

6. Bleed the radiators. Start with the lower floors.

T000183-A

T000184-A

T000155-A

T000185-A

T000216-A

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 5. Checking and maintenance

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7. Open the bleed connection using the bleed key provided whilst

keeping a rag pressed against the connection.

8. Wait until water comes out of the bleed valve and then close the

bleed connection.

CAUTION

The water may still be hot.

9. After venting, check whether the pressure in the installation is still

sufficient. Add water to the installation if necessary.

10.Switch on the boiler. A vent cycle of a duration of around 3 minutes

is carried out automatically.

11.Set the room thermostat or the regulator.

T000217-A

T000218-A

T000228-A

1,5 ... 2 bar

T000183-A

5. Checking and maintenance

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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5.5 Draining the installation

It may become necessary to empty the water from the heating system

when the radiators have to be replaced, should there be a major water

leak or a risk of frost. To do this, proceed as follows:

1. Open the valves on all radiators connected to the heating system.

2. Switch off the boiler electrical power supply.

3. Wait around 10 minutes until the radiators are cold.

4. Connect an evacuation hose to the plug located at the lowest

level. Place the end of the hose in a discharge sump or in a place

where the water discharged from the valve can not do any

damage.

5. Open the filling/draw-off valve on the heating system. Vent the

heating installation.

WARNING

The water may still be hot.

6. When no more water comes out of the drainage plug, close the

drainage valve.

T000181-B

T000185-A

T000858-A

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 5. Checking and maintenance

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6 Troubleshooting

6.1 Error codes

6.1.1.

If one of the breakdown codes opposite is dispayed, check the

hydraulic pressure:

Case 1: Pressure higher than or equal to 1 bar

4 Press the RESET key to reset the appliance. Wait a few seconds.

- If the display shows 0, the boiler is again operating normally.

- If the display again shows e1, e2 or e7, contact the

installer.

Case 2: Pressure lower than 1 bar

4 Top up the installation with water. ¼See chapter: "Filling the

system", page 20.

4 Press the RESET key to reset the appliance. Wait a few seconds.

- If the display shows 0, the boiler is again operating normally.

- If the display again shows e1, e2, e7 or e9, contact the

installer.

6.1.2.

6.1.3. Other error codes

If another error code is displayed, contact the installer.

6.1.4. Before contacting the installer

Before contacting the installer

Note the following information on the appliance’s rating plate:

4 Type of gas used

4 Boiler type

4 Manufacturing date

4 Serial no. of the appliance

6. Troubleshooting

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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6.2 Incidents and solutions

Problem Probable causes Solution

There is no domestic hot water.

The boiler is not switched on.

4 Check that the boiler is switched on.

4 Check the fuses and switches.

4 Check that the gas valve is fully opened.

The DHW mode is deactivated.

Activate the DHW mode.

¼See chapter: "Stopping domestic hot water

production", page 16.

The water pressure is too low (<

1 bar).

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

The energy-saving shower head

is restricting the water flow.

Clean the shower head; replace if necessary.

The radiators are cold.

The heating temperature setting

is too low.

Increase the value of parameter p1 or, if a room

thermostat is connected, increase the temperature.

¼See chapter: "Changing the heating

temperature", page 13.

The heating mode is deactivated.

Activate the heating mode.

¼See chapter: "Stopping the central heating or

activating the Summer mode", page 15.

The radiator valves are closed. Open the valves on all radiators connected to the heating

system.

The boiler is not switched on.

4 Check that the boiler is switched on.

4 Check the fuses and switches.

4 Check that the gas valve is fully opened.

The water pressure is too low (<

1 bar).

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

The boiler is not working.

The heating temperature setting

is too low.

Increase the value of parameter p1 or, if a room

thermostat is connected, increase the temperature.

¼See chapter: "Changing the heating

temperature", page 13.

The boiler is not switched on.

4 Check that the boiler is switched on.

4 Check the fuses and switches.

4 Check that the gas valve is fully opened.

The water pressure is too low (<

1 bar).

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

An error code appears on the

display.

4 Press the Reset button for 2 seconds.

4 Correct the error if possible. ¼See chapter:

"Error codes", page 25.

The gas pressure is too low. Open the gas valve.

The water pressure is too low

(< 1 bar).

Not enough water in the

installation.

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

Water leak. Contact the fitter.

Significant variations in

domestic hot water

temperature.

Insufficient water supply. Open the valve.

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 6. Troubleshooting

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Problem Probable causes Solution

Clicking in the central heating

pipes

The central heating pipe

connections are too tight.

Contact the fitter.

There is air in the heating pipes. It is essential that you bleed any air in the calorifier, the

conduits or the taps to prevent the annoying noises likely to

be produced during heating or when tapping water.

The water is circulating too

quickly in the central heating

system.

Contact the fitter.

Significant water leak under or

close to the boiler

The boiler or central heating pipes

are damaged.

Close the water supply. Contact the fitter.

6. Troubleshooting MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

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7 Technical specifications

7.1 Technical specifications

Boiler type MCR 24 MCR 24/28

MCR 30/35

MCR 34/39

Heating mode Nominal useful output 40/30

(min / max)

kW 6.3 /25 6.3 /25 6.6 /31.3 6.8 /35.5

Nominal useful output 80/60

(min / max)

kW 5.5 / 23.6 5.5 / 23.6 5.7 / 29.5 5.9 / 33.3

Nominal input power kW 24 24/28 30/35 34/39

Minimum input power kW 5.8 5.8 6.1 6.3

Domestic hot water mode Nominal useful output kW - 27.4 34.3 38.2

Nominal input power kW 24 24/28 30/35 34/39

Minimum input power kW 5.8 5.8 6.1 6.3

Gas flow rate at nominal

output (15 °C -

1013 mbar)

Natural gas H (G20)

2.4 2.4 3.5 3.9

Natural gas L (G25)

2.8 2.8 4.1 4.5

Propane (G31) Kg/h 1.9 1.9 2.7 3.0

LHV efficiency 100% of nominal output and

average water temperature in

the boiler of 70°C

% 98.3 98.3 98.2 98

100% of nominal output and

return temperature of 30°C

% 104.4 104.4 104.4 104.4

30% of nominal output and

return temperature of 30°C

% 108.7 108.7 109.7 110.5

HHV efficiency 100% of nominal output and

average water temperature in

the boiler of 70°C

% 88.5 88.5 88.4 88.2

100% of nominal output and

return temperature of 30°C

% 94 94 94 94

30% of nominal output and

return temperature of 30°C

% 97.9 97.9 98.8 99.5

Maximum temperature (Safety thermostat cut-off) °C 110 110 110 110

Stand-by losses (ΔT = 30 °C) W 30 30 29 28

Losses through the outer casing % 1.1 1.1 0.9 0.5

Water content litres 1.7 1.8 2 2.2

Weight empty, without mounting frame, without front cover kg 29 30.5 32 31.5

Heating circuit

Nominal water flow (ΔT = 20 K)

1.03 1.03 1.29 1.47

Manometric height (ΔT = 20 K)

mbar

(1)

> 250 > 250 > 200 > 200

Flow temperature °C 75/85 75/85 75 75

Maximum pressure bar 3 3 3 3

Expansion vessel litres 8 8 8 -

Initial pressure of the expansion vessel bar 1 1 1 1

Minimum operating pressure bar 0.8 0.8 0.8 0.8

Domestic hot water circuit

Instruction set outlet temperature °C 55 55 55 55

(1) 1 mbar = 100 Pa, 1 daPa = 1 mmWG

(2) Cold water inlet temperature: 10 °C

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI 7. Technical specifications

160513 - 300015874-001-01

Boiler type MCR 24 MCR 24/28

MCR 30/35

MCR 34/39

Specific hot water flow (ΔT = 30 K)

(2)

litres per

min.

- 14 16 19

Nominal max cold water pressure

(2)

bar 8 8 8 8

Minimum pressure for 11 l/min

(2)

bar - 1.4 0.4 0.4

Water capacity litres - 40 40 40

Combustion products circuit

Connection diameter mm 80/125 80/125 80/125 80/125

Mass flue gas flow rate (min / max) Kg/h 10/37 10/47 10/59 10/62

Flue gas temperature 80/60 °C 78 78 74 71.5

Pressure available at the flue gas nozzle

(1)

50 100 100 140

Condensation water pH 50/30

1 - 7 1 - 7 1 - 7 1 - 7

Electricity characteristics

Power supply voltage (50 Hz) V 230 230 230 230

Power consumption W 115 115 150 180

Electrical power circulating pump W 90 90 125 135

Auxiliary electrical power (nominal output, ex heating

pump)

W 25 25 25 25

Electrical protection index

IPX4D IPX4D IPX4D IPX4D

(1) 1 mbar = 100 Pa, 1 daPa = 1 mmWG

(2) Cold water inlet temperature: 10 °C

7. Technical specifications MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

160513 - 300015874-001-01

8 Energy savings

8.1 Energy savings

This chapter contains:

4 Energy-saving advice

4 Advice on setting the room thermostat correctly

8.1.1. Energy-saving advice

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

not block ventilation outlets. Install reflective panels behind the

radiators to prevent heat losses.

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

radiators.

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.

8.1.2. Room thermostat and settings

The room thermostat is available in the following versions:

4 2-wire ON/OFF thermostat

4 Modulating thermostat

4 Programmable room temperature thermostat

The type of thermostat and its settings have a considerable influence

on energy consumption.

A few tips:

4 A modulating thermostat, possibly in combination with

thermostatic valve radiators, saves energy and offers

considerable comfort. This combination allows you to set the

temperature on each flow.

4 Completely closing and opening thermostatic valve radiators

causes undesirable temperature fluctuations. Open and close

thermostatic valves in small steps.

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

and energy consumption.

4 Lower the room thermostat when you air the rooms.

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

8. Energy savings

160513 - 300015874-001-01

4 If you are using an ON/OFF type thermostat, reduce the water

temperature value (p1) in summer (e.g. 60 in summer and

80 in winter).

4 When setting an hourly programmable thermostat, keep in mind

the days you are absent or on vacation.

8. Energy savings MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

160513 - 300015874-001-01

9 Warranty

9.1 General

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 fitter and our customer support network are at your disposal at

all times.

9.2 Warranty terms

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 fitter’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.

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.

MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI

9. Warranty

160513 - 300015874-001-01

AD001NU-Ai

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

Av. Princep d’Astúries 43-45

08012 BARCELONA

+34 932 920 520

+34 932 184 709

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

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.

160513

300015874- 001- 01

DEDIETRICH THERMIQUE

57,ruedelaGareF-67580MERTZWILLER-BP 30

How to resolve error: A0206 on mcr-s 24/28 mi boiler model? Submitted on 10-1-2023 at 07:27
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my water , heating system all failed, display doesnot work, i did not see fire also, my on off buttom also pushed, only machine running sound comes, rest nothing working. Submitted on 22-11-2019 at 02:01
Reply Report abuse
My heating not working , i think not fire there, i want to see video to check the system Submitted on 22-11-2019 at 01:10
Reply Report abuse

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