DE DIETRICH MCR 24 User Manual

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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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Contents

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

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

1 Introduction

1.1 Symbols used

1. Introduction

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.

1.2 Abbreviations

1.3 General

CAUTION

Risk of material damage.

Signals important information.

¼Signals a referral to other instructions or other pages in the instructions.

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).

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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.

1. Introduction

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

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.

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

1.4 Homologations

1.4.1. Certifications

CE identification no

NOx < 70 mg/kWh

Type of connection Chimney: B

PIN 0063BQ3009

Flue gas outlet: C13,C33,C43,C53,C63,C83, C

23P

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

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

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T004250-A

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

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

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

3.3 Control panel

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.

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

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T000164-B

A000785-A

A000787-A

4. Operating the appliance

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

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 pK[xx

: Software version

: 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.

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T000138-A

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

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 4 Mf = 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

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T000147-A

GA,

HF,

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

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 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. ¼

See chapter: "Other settings", page 16.

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T000143-A

Ajj

T000148-B

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

4.3.2. 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. ¼

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 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 mode.

It also possible to modify this setting using the parameter p4. ¼See chapter: "Other settings", page 16.

key 2 times to return to the current operating

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HF,

Ajj

T000141-A

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

4.3.4. 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

3. To confirm the new value, press the key S. The symbol C 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.

0ff

is displayed.

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GA,

Ajj

T000142-A

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

4.3.5. 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

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.

0ff

is displayed.

Parameter

Description Adjustment range

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

Domestic hot water temperature

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Heating / DHW mode

4.3.6. Other settings

Factory setting

MCR 24

40 to 65 °C 55 °C 55 °C 55 °C 55 °C 0 = Heating deactivated (C) / DHW

deactivated (T) 1 = Heating activated (D) / DHW

activated (N) 2 = Heating activated (D) / DHW

deactivated (T) 3 = Heating deactivated (C) / DHW

activated (N)

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

2 1 1 1

T000307-A

4. Operating the appliance

Parameter Description Adjustment range

0 = Comfort mode

ECO mode

Anticipation resistance

Display screen

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 = The screen stays off

1 = The screen stays on

2 = The screen switches off automatically after 3 minutes

To change these parameters, proceed as follows:

1. Press key f several times until the symbol W flashes on the menu

2. Press the S key to enter the "User" menu.

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.

7. If necessary, set other parameters by selecting them using the +

8. To exit the User menu, press the

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

Factory setting

MCR 24

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

2 2 2 2

0 0 0 0

2 2 2 2

bar.

The symbol

p[1

appears.

The name of the modified parameter is displayed.

or - keys.

key 2 times.

4.4 Installation shutdown

If no selections are made in the various modes for 10 minutes, the boiler resumes the settings prior to manipulation.

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.

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

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.

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T000181-B

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

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).

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T000181-B

T000182-A

T000155-A

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

5. Checking and maintenance

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.

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3. Switch off the boiler electrical power supply.

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

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

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

8. Set the room thermostat or the regulator.

9. Set the radiator valves.

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.

pressure of 2 bar.

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.

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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

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.

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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

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.

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T000181-B

T000185-A

T000858-A

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

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.

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6. Troubleshooting

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.

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

- 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

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

6.2 Incidents and solutions

Problem Probable causes Solution

4 Check that the boiler is switched on.

There is no domestic hot water.

The radiators are cold.

The boiler is not working.

The water pressure is too low (< 1 bar).

Significant variations in domestic hot water temperature.

The boiler is not switched on.

The DHW mode is deactivated.

The water pressure is too low (< 1 bar).

The energy-saving shower head is restricting the water flow.

The heating temperature setting is too low.

The heating mode is deactivated.

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

The boiler is not switched on.

The water pressure is too low (< 1 bar).

The heating temperature setting is too low.

The boiler is not switched on.

The water pressure is too low (< 1 bar).

An error code appears on the display.

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

Not enough water in the installation.

Water leak. Contact the fitter.

Insufficient water supply. Open the valve.

4 Check the fuses and switches.

4 Check that the gas valve is fully opened.

Activate the DHW mode.

¼See chapter: "Stopping domestic hot water production", page 16.

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

Clean the shower head; replace if necessary.

Increase the value of parameter p1 or, if a room thermostat is connected, increase the temperature.

¼See chapter: "Changing the heating temperature", page 13.

Activate the heating mode.

¼See chapter: "Stopping the central heating or activating the Summer mode", page 15.

system.

4 Check that the boiler is switched on.

4 Check the fuses and switches.

4 Check that the gas valve is fully opened.

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

Increase the value of parameter p1 or, if a room thermostat is connected, increase the temperature.

¼See chapter: "Changing the heating temperature", page 13.

4 Check that the boiler is switched on.

4 Check the fuses and switches.

4 Check that the gas valve is fully opened.

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

4 Press the Reset button for 2 seconds. 4 Correct the error if possible. ¼See chapter:

"Error codes", page 25.

Top up the installation with water. ¼See chapter:

"Filling the system", page 20.

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

Problem Probable causes Solution

The central heating pipe

Contact the fitter.

connections are too tight.

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

The water is circulating too

conduits or the taps to prevent the annoying noises likely to be produced during heating or when tapping water.

Contact the fitter. quickly in the central heating system.

Significant water leak under or close to the boiler

The boiler or central heating pipes are damaged.

Close the water supply. Contact the fitter.

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

7 Technical specifications

7.1 Technical specifications

Boiler type MCR 24 MCR 24/28MIMCR 30/35MIMCR 34/39

Heating mode Nominal useful output 40/30

(min / max)

Nominal useful output 80/60 (min / max)

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)

LHV efficiency 100% of nominal output and

HHV efficiency 100% of nominal output and

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)

Manometric height (ΔT = 20 K)

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

Natural gas H (G20)

Natural gas L (G25)

Propane (G31) Kg/h 1.9 1.9 2.7 3.0

average water temperature in the boiler of 70°C

100% of nominal output and return temperature of 30°C

30% of nominal output and return temperature of 30°C

average water temperature in the boiler of 70°C

100% of nominal output and return temperature of 30°C

30% of nominal output and return temperature of 30°C

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

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

m3/h

% 98.3 98.3 98.2 98

% 104.4 104.4 104.4 104.4

% 108.7 108.7 109.7 110.5

% 88.5 88.5 88.4 88.2

% 94 94 94 94

% 97.9 97.9 98.8 99.5

m3/h

(1)

mbar

2.4 2.4 3.5 3.9

2.8 2.8 4.1 4.5

1.03 1.03 1.29 1.47

> 250 > 250 > 200 > 200

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

Boiler type MCR 24 MCR 24/28MIMCR 30/35MIMCR 34/39

Specific hot water flow (ΔT = 30 K)

(2)

litres per

- 14 16 19

min.

Nominal max cold water pressure

Minimum pressure for 11 l/min

(2)

bar 8 8 8 8

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

(1)

50 100 100 140

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

Pressure available at the flue gas nozzle

Condensation water pH 50/30

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

W 25 25 25 25

pump)

Electrical protection index

(1) 1 mbar = 100 Pa, 1 daPa = 1 mmWG (2) Cold water inlet temperature: 10 °C

IPX4D IPX4D IPX4D IPX4D

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

8 Energy savings

8.1 Energy savings

8. 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.

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

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.

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

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 fitter 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 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.

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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-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

300015874- 001-01

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.

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DE DIETRICH MCR 24 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual