DeDietrich EMC-M 24, EMC-M 24/28 MI, EMC-M 30/35 MI, EMC-M 34/39 MI Installation And Service Manual

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Page 1

Wall-hung gas condensing boilers

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

Installation and Service Manual

7601972-03

Page 2

EG declaration of conformity

The device complies with the standard type described in the EG declaration

of conformity. It was manufactured and commissioned in

accordance with European directives.

The original of the declaration of compliance is available from the manufacturer.

Page 3

Contents

1 Introduction ................................................................................................6

1.1 Symbols used .......................................................6

1.2 Abbreviations ........................................................6

1.3 General ..................................................................6

1.3.1

Manufacturer’s liability .............................................6

1.3.2 Installer’s liability .....................................................7

1.3.3 User’s liability ..........................................................7

1.4 Homologations ......................................................8

1.4.1 Certifications ...........................................................8

1.4.2 Additional Directives ................................................8

2 Safety instructions and recommendations ..............................................9

2.1 Safety instructions ...............................................9

2.2 Recommendations ................................................9

3 Technical description ..............................................................................11

3.1 General description ............................................11

3.2 Main parts ............................................................11

3.3 Skeleton Diagrams .............................................12

3.4 Operating principle .............................................12

3.4.1 Regulation of the water temperature .....................12

3.4.2 Protection against a shortage of water ..................13

3.4.3 Maximum temperature protection .........................13

3.5 Circulating pump ................................................13

3.6 Technical specifications ....................................14

4 Installation ................................................................................................16

4.1 Regulations governing installation ...................16

4.2 Choice of the location ........................................16

4.2.1 Data plate ..............................................................16

4.2.2 Location of the boiler .............................................16

4.2.3 Ventilation .............................................................17

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4.3 Main dimensions .................................................18

4.4 Installing the mounting frame ...........................19

4.5 Positioning the boiler .........................................19

4.6 Hydraulic connections .......................................20

4.6.1

Flushing the system ..............................................20

4.6.2 Water flow rate ......................................................20

4.6.3 Connection of the heating circuit ...........................21

4.6.4 Connection of the water circuit for domestic

use ........................................................................21

4.6.5 Connecting the expansion vessel .........................21

4.6.6 Connecting the condensate discharge pipe ..........22

4.6.7 Automatic air bleed ...............................................23

4.7 Gas connection ...................................................23

4.8 Flue gas system connections ............................24

4.8.1 Classification .........................................................24

4.8.2 Lengths of the air/flue gas pipes ...........................25

4.8.3 Additional Directives ..............................................26

4.9 Electrical connections ........................................27

4.9.1 Control unit ............................................................27

4.9.2 Recommendations ................................................27

4.9.3 PC/Laptop connection ...........................................28

4.9.4 Connecting service tool .........................................28

4.9.5 Access to the connector block ..............................29

4.9.6 Connection options ...............................................29

4.10 Electrical diagram ...............................................33

4.11 Filling the system ...............................................33

4.11.1 Water treatment ....................................................33

4.11.2 Filling the siphon ...................................................34

4.11.3 Filling the system ..................................................35

4.11.4 Venting the system ................................................35

5 Commissioning ........................................................................................37

5.1 Connection box ...................................................37

5.1.1 Control panel .........................................................37

5.2 Check points before commissioning ................38

5.2.1 Preparing the boiler for commissioning .................38

5.2.2 Hydraulic circuit .....................................................38

5.2.3 Electrical connections ...........................................38

5.3 Commissioning the boiler ..................................39

5.4 Gas settings ........................................................40

5.4.1 Gas circuit .............................................................40

5.4.2 Adapting to another gas type ................................40

5.4.3 Setting the air/gas ratio (Full load) ........................41

5.4.4 Setting the air/gas ratio (Part load) ......................43

Contents

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5.5 Finalizing work ....................................................44

5.6 Reading out measured values ...........................44

5.6.1

Status and sub-status ...........................................44

5.7 Changing the settings ........................................45

5.7.1 Parameter descriptions .........................................46

5.7.2 Setting the maximum heat input for central heating

operation ...............................................................48

6 Switching off the boiler ............................................................................49

6.1 Installation shutdown .........................................49

6.2 Antifreeze protection ..........................................49

7 Checking and maintenance .....................................................................50

7.1 General instructions ...........................................50

7.2 Standard inspection and maintenance

operations ...........................................................50

7.2.1 Open the boiler ......................................................50

7.2.2 Checking the hydraulic pressure ...........................51

7.2.3 Checking the expansion vessel .............................51

7.2.4 Checking the ionization current .............................51

7.2.5 Checking the transfer capacity ..............................51

7.2.6 Checking the flue gas discharge and the air

supply ....................................................................52

7.2.7 Checking combustion ............................................52

7.2.8 Checking the automatic air vent ............................52

7.2.9 Checking the siphon ..............................................53

7.2.10 Checking the burner and cleaning the heat

exchanger .............................................................54

7.3 Specific maintenance operations ......................55

7.3.1 Replacing the ionization/ignition electrode ............55

7.3.2 Replacing the 3-way valve ....................................56

7.3.3 Cleaning the plate exchanger ...............................56

7.3.4 Cleaning the domestic water cartridge ..................57

7.3.5 Replacement of the expansion vessel ..................57

7.3.6 Re-assembling the boiler ......................................58

8 Troubleshooting .......................................................................................60

8.1 Error codes ..........................................................60

8.2 Shutdowns and lock-outs ..................................60

8.2.1 Blocking .................................................................60

8.2.2 Lock out .................................................................62

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9 Spare parts ................................................................................................67

9.1 General ................................................................67

9.2 Spare parts ..........................................................67

9.2.1

Casing ...................................................................69

9.2.2 Heat exchanger .....................................................70

9.2.3 Gas/air system ......................................................71

9.2.4 Connection box .....................................................72

9.2.5 Hydraulic unit/Connecting pipes ............................73

9.2.6 Spare parts list ......................................................74

10 Appendix ...................................................................................................76

10.1 User instruction card ..........................................76

Contents

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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 3CE: Combination of air supply and combustion gas discharge

4 DHW: Domestic hot water

4 PCU: Primary Control Unit - Electronic system to control burner

function

4 SCU: Secondary Control Unit - Additional electronic system

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.

1. Introduction EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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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.

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 1. Introduction

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1.4 Homologations

1.4.1. Certifications

CE identification no

PIN 0063CM3019

NOx classification

5 (Standards EN)

Type of connection Chimney: B23, B

23P

, B

Flue gas outlet: C

13(x)

, C

33(x)

, C

43(x)

, C53, C

63(x)

83(x)

, C

93(x)

1.4.2. Additional Directives

Apart from the legal provisions and Directives, the additional Directives described in these instructions must also be observed

For all provisions and Directives referred to in these instructions, it is agreed that all addenda or subsequent provisions will apply at the time of installation.

WARNING

Installation of the appliance must be done by a qualified engineer in accordance with prevailing local and national regulations

1. Introduction EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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2 Safety instructions and

recommendations

2.1 Safety instructions

DANGER

If you smell gas:

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. Trace possible leaks and seal them immediately.

5. If the gas leak is before the gas meter, contact the gas supplier.

DANGER

If you smell flue gases:

Switch the appliance off.

2. Open the windows.

3. Trace possible leaks and seal them immediately.

2.2 Recommendations

WARNING

4 Installation and maintenance of the boiler must be

carried out by a qualified professional in compliance with prevailing local and national regulations.

4 When working on the boiler, always disconnect the

boiler from the mains and close the main gas inlet valve.

4 After maintenance or repair work, check all

installations to ensure that there are no leaks.

CAUTION

The boiler must be installed in a frost-free environment.

Keep this document close to the place where the boiler is installed.

Casing components

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 2. Safety instructions and recommendations

210212 - 7601972-03

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Only remove the casing for maintenance and repair operations. Put the casing back in place after maintenance and repair operations.

Instructions stickers

The

instructions and warnings affixed to the appliance must never be removed or covered and must remain legible during the entire lifespan of the appliance. Immediately replace damaged or illegible instructions and warning stickers.

Modifications

Modifications may only be made to the boiler after the written permission of De Dietrich Thermique to do so.

2. Safety instructions and recommendations EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

210212 - 7601972-03

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3 Technical description

3.1 General description

Wall-hung gas condensing boilers

4 High efficiency heating.

4 Low pollutant emissions.

4 Installation and connection facilitated by the mounting frame

delivered with the appliance.

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

connection.

4 EMC-M 24: Heating only (Possibility of producing domestic hot

water via an independent tank which has been installed separately).

4 EMC-M 24/28 MI - 30/35 MI - 34/39 MI: Heating and domestic hot

water production.

3.2 Main parts

Flue gas outlet/Air intake

Casing/air box

Outlet for measuring combustion gases

Ignition/ionization electrode

Flue gas discharge pipe

Gas/air system with a fan, gas block and automatic burner unit

Air intake silencer

Plate heat exchanger (DHW) (Only on models with domestic hot water production

)

Connection box

Siphon

Shunt pump

3-way valve

Heat exchanger (Central heating)

Expansion vessel

Automatic air vent

T004783-A

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 3. Technical description

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3.3 Skeleton Diagrams

EMC-M 24

Heat exchanger (Central heating)

Safety valve

Heating flow (Primary circuit)

Heating flow (Secondary circuit)

Heating return (Secondary circuit)

Heating return (Primary circuit)

3-way valve

Shunt pump (Central heating)

EMC-M 24/28 MI - 30/35 MI - 34/39 MI

Heat exchanger (Central heating)

Hydroblock

Plate heat exchanger (DHW)

Safety valve

Heating flow

Domestic hot water outlet (DHW)

Domestic cold water inlet

Heating return

Shunt pump (Central heating)

3-way valve

3.4 Operating principle

3.4.1. Regulation of the water temperature

The boiler is fitted with an electronic temperature regulator having an outlet

and return temperature probe. The flow temperature can be set between 20°C and 90°C. The boiler reduces its power when the set outlet-temperature is attained. The cutout temperature is the set heating outlet-temperature + 5 °C.

T003806-A

3 4 5 6

T003393-D

5 6 7 8

3. Technical description EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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3.4.2. Protection against a shortage of water

The boiler is fitted with a safety device to prevent the shortage of water based on temperature measurements.

By reducing its output when the water flow rate is in danger of becoming insufficient, the boiler continues to operate as long as possible. In case of insufficient ΔT ≥ 50°C flow or an excessive increase in flow temperature, the boiler will enter shutdown mode for 10 minutes. When there is no water in the boiler, or if the pump is not running, the system is locked (breakdown)

In the event of a fault, the status signal for the B

button on

the connection box flashes red.

¼For more detailed information, see chapter:

"Shutdowns and

lock-outs", page 60.

3.4.3. Maximum temperature protection

The maximum temperature protection locks the boiler if the water temperature becomes too high (

110°C).

In the event of a fault, the status signal for the B

button on

the connection box flashes red.

¼For more detailed information, see chapter:

"Shutdowns and

lock-outs", page 60.

3.5 Circulating pump

The boiler is fitted with an on/off circulation pump.

EMC-M 24

Manometric height central heating circuit

Water flow ( ΔT=20K)

EMC-M 24/28 MI

Manometric height central heating circuit

Water flow ( ΔT=20K)

R000367-A

12001000600 800400200

100

200

300

400

500

600

Q (l/h)

16001400

700

H (mbar)

1030

24 kW

275

R000365-A

12001000600 800400200

100

200

300

400

500

600

H (mbar)

Q (l/h)

16001400

860

1030

20 kW

24 kW

253

127

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Page 16

EMC-M 30/35 MI - 34/39 MI

Manometric height central heating circuit

Water flow ( ΔT=20K)

3.6 Technical specifications

Boiler type EMC- M

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

General

EC indentification no. PIN

0063CM3019

Flow rate setting Adjustable

Modulating, Start/Stop

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

minimummaximum

kW 5,5 - 23,4 5,5 - 23,4 7,7 - 29,2 7,7 - 33,8

Factory setting kW 23,4 19,5 29,2 29,1

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

minimummaximum

kW 6,1 - 24,8 6,1 - 24,8 8,5 - 31,0 8,5 - 35,7

Factory setting kW 24,8 20,7 31,0 30,7

Nominal output (Pn) DHW System

minimum maximum

kW - 5,5 - 27,5 7,7 - 33,9 7,7 - 37,8

Factory setting kW - 27,5 33,9 37,8

Nominal input (Qn) Heating System (Hi)

minimum maximum

kW 5,6 - 24,0 5,6 - 24,0 7,8 - 30,0 7,8 - 34,9

Factory setting kW 24,0 20,0 30,0 30,0

Nominal input (Qn) Heating System (Hs)

minimum maximum

kW 6,2 - 26,7 6,2 - 26,7

8,7 - 33,3 8,7 - 38,8

Factory setting kW 26,7 22,2 33,3 33,3

Nominal input (Qnw) DHW System (Hi)

minimummaximum

kW -

5,6 - 28,2 7,8 - 34,9 7,8 - 39

Nominal input (Qnw) DHW System (Hs)

minimummaximum

kW -

6,2 - 31,3 8,7 - 38,8 8,7 - 43,3

Nominal input (Qn) Propane (Hi)

minimum kW

7,1 7,1 10 10

Nominal input (Qn) Propane (Hs)

minimum kW

7,7 7,7 10,9 10,9

Heating efficiency under full load (Hi) (80/60 °C)

- % 97,6 97,6 97,2 96,9

Heating efficiency under full load (Hi) (50/30 °C)

- % 103,3 103,3 103,3 102,4

Heating efficiency under partial load (Hi) (Return temperature 60

°C)

- % 97,8 97,8 98,4 98,4

Heating efficiency under partial load (Hi) (92/42 EEG) (Return temperature 30

°C)

- % 109,2 109,2 108,8 108,8

Data on the gases and combustion gases

Equipment categories

- II

2ESi3P

Type of air/flue gas connection

B23, B

23P

, B33, C

13x

, C

33x

, C

43x

, C53, C

63x

, C

83x

, C

93x

(1) Front panel removed

R000368-A

12001000600 800400200

100

200

300

400

500

600

Q (l/h)

16001400

700

H (mbar)

1250

30 kW

317

187

1500

35 kW

3. Technical description EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

210212 - 7601972-03

Page 17

Boiler type EMC- M

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

Gas inlet pressure G20 (Gas H) minimum-

maximum

mbar 17 - 30 17 - 30 17 - 30 17 - 30

Connecting pressure

mbar 20 20 20 20

Gas inlet pressure G25 (Gas L) minimum-

maximum

mbar 20 - 30 20 - 30 20 - 30 20 - 30

Connecting pressure

mbar 25 25 25 25

Gas inlet pressure G31 (Propane) minimum-

maximum

mbar 30- 50 30- 50 30- 50 30- 50

Connecting pressure

mbar 37 37 37 37

Gas consumption G20 (Gas H) minimum-

maximum

m3/h

0,59 - 2,54 0,59 - 2,98 0,83 - 3,68 0,83 - 4,13

Gas consumption G25 (Gas L) minimum-

maximum

m3/h

0,69 - 2,95 0,69 - 3,47 0,96 - 4,28 0,96 - 4,80

Gas consumption G31 (Propane) minimum-

maximum

m3/h

0,29 - 0,98 0,29 - 1,15 0,41 - 1,42 0,41 - 1,47

NOx annual emission (n=1)

mg/kWh 58 58 52 56

NOx classification (EN 297 pr A3, EN

483)

5 5 5 5

Mass flue gas flow rate minimum-

maximum

kg/h

9,4 - 38,7 9,4 - 45,5 13,1 - 56,2 13,1 - 62,9

Flue gas temperature minimum-

maximum

°C

32 - 78 32 - 84 31 - 82 31 - 86

Maximum counter pressure

Pa 80 116 105 120

Characteristics of the heating circuit

Water content

l 1,4 1,6 1,7 1,7

Water operating pressure minimum bar 0,8 0,8 0,8 0,8

Water operating pressure (PMS) maximum bar 3,0 3,0 3,0 3,0

Water temperature maximum °C 110 110 110 110

Operating temperature maximum °C 90 90 90 90

Characteristics of the domestic hot water circuit

Specific hot water flow (∆T = 30K)

l/min - 14 17 19

Domestic water resistance (without flow restrictor)

mbar - 123 215 260

Flow rate threshold minimum l/min - 1,2 1,2 1,2

Water content

l - 0,16 0,18 0,18

Operating pressure (Pmw) maximum bar - 8 8 8

Electrical characteristics

Power supply voltage

VAC 230 230 230 230

Power consumption Full load maximum W 117 117 145 159

Power consumption Part load maximum W 96 82 101 101

Power consumption - Standby maximum W 3 3 3 3

Electrical protection index

IP X4D X4D X4D X4D

Other characteristics

Weight (empty)

Total kg 24,5 26 28,5 28,5

Mounting

(1)

kg 23 24 27 27

Acoustic level at 1 metre

maximum Heating System

dB(A) 40 38 42 42

maximum DHW System

dB(A) _ 42 45 46

(1) Front panel removed

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Page 18

4 Installation

4.1 Regulations governing installation

WARNING

Installation of the appliance must be done by a qualified engineer in accordance with prevailing local and national regulations.

4.2 Choice of the location

4.2.1. Data plate

The identification plate on top of the boiler features the boiler serial number and important boiler specifications, for example the model and unit category. The dF and dU codes are also stated on the type plate.

4.2.2.

Location of the boiler

4 Before mounting the boiler, decide on the ideal position for

mounting, bearing the Directives and the dimensions of the appliance in mind.

4 When choosing the position for mounting the boiler, bear in mind

the authorised position of the combustion gas discharge outlets and the air intake opening.

4 Make sure there is enough room underneath the boiler for the

connection box.

4 To ensure adequate accessibility to the appliance and facilitate

maintenance, leave enough space around the boiler.

4 Mount the boiler onto a flat surface.

R000292-A

R000424-A

368

1000

364

≥ 200

≥ 250

554

4. Installation EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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Page 19

WARNING

4 Fix the appliance to a solid wall capable of bearing

the weight of the appliance when full of water and fully equipped.

4 Do not place the appliance above a heat source or a

cooking appliance.

4 Do not locate the boiler in direct or indirect sunlight.

4 It is forbidden to store inflammable products and

materials in the boiler room or close to the boiler, even temporarily.

CAUTION

4 The boiler must be installed in a frost-free

environment.

4 An earthed electrical connection must be available

close to the boiler.

4 A connection to the mains drainage system for the

discharge of condensate must be available close to the boiler.

4.2.3. Ventilation

(1)

Distance between the front of the boiler and the internal wall of the casing box.

If the boiler is installed in a closed casing, respect the minimum dimensions given in the diagram opposite.

Also allow openings to

obviate the following hazards:

4 Accumulation of gas

4 Heating of the box

Minimum cross section of the openings: S1 + S2 = 150 cm

R000421-A

368

≥ 250

554

≥ 464

≥

100

(1)

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Page 20

4.3 Main dimensions

Connection of the combustion gas exhaust pipe; Ø 60 mm

Connection of the air intake pipe; Ø 100 mm

Safety valve outlet pipe; Ø 15 mm

Condensates discharge; Ø 25 mm

{

Heating circuit flow; G¾"

Domestic hot water outlet; G½"

Gas / Gaz

Gas connection; G½"

Domestic cold water inlet; G½"

Heating circuit return; G¾"

R000354-A

368

184

364

243

541

209

230

664

151

= 117

= 184

= 251

= 316

187

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4.4 Installing the mounting frame

1. Drill 2 holes with Ø 10 mm for the lower part of the mounting

frame. Put the plugs in place.

CAUTION

Make sure that all the drill holes are level.

2. Affix

the lower part of the mounting frame to the wall using 2 of the

screws supplied.

3. Open out the mounting frame and mark out the 2 drill holes for the

upper part of the mounting frame on the wall. Drill 2 holes with a Ø of 10 mm. Put the plugs in place.

4. Affix the upper part of the mounting frame to the wall using 2 of

the screws supplied.

5. Extend the mounting frame to its maximum depth to install a boiler

with a built-in expansion vessel. To do so, remove the plastic screws from the lower bracket, and once it has been extended, replace the screws to fix the mounting frame.

4.5 Positioning the boiler

1. Remove the protective caps from all of the hydraulic inlets and

outlets on the boiler.

CAUTION

The cock from the filling loop must be closed.

2. Fit a fibre gasket to each joint on the valve plate.

T003395-F

R000419-A

T002375-D

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3. Position the boiler above the plumbing fixtures plate and locate it

against the mounting frame. Gently lower the boiler.

Mount the

boiler using the suspension bracket on the back of the boiler.

4. Tighten the valve nuts on the boiler.

4.6 Hydraulic connections

4.6.1. Flushing the system

Installation must be carried out in accordance with the prevailing regulations,

the codes of practice and the recommendations in these

instructions.

Installing the boiler in new installations (installations less than 6 months old)

4 Clean the installation with a universal cleaner to eliminate debris

from the appliance (copper, hemp, flux).

4 Thoroughly flush the installation until the water runs clear and

shows no impurities.

Installing the boiler in existing installations

4 Remove sludge from the installation.

4 Flush the installation.

4 Clean the installation with a universal cleaner to eliminate debris

from the appliance (copper, hemp, flux).

4 Thoroughly flush the installation until the water runs clear and

shows no impurities.

4.6.2. Water flow rate

The boiler’s modulating control system limits the maximum difference in

temperature between the heating flow and return and the maximum speed at which the flow temperature increases. In this way, the boiler does not require a minimum water flow rate.

If using a heating and domestic hot water production type boiler on an installation in which the flow can be fully disconnected from the return (e.g. by using thermostatic valves), you should either fit a bypass or fit an expansion vessel to the heating flow conduit.

R000420-A

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Page 23

4.6.3. Connection of the heating circuit

1. Connect the heating water return pipe to the heating return

connection z.

Connect the heating water outlet pipe to the heating flow connection {.

CAUTION

4 The heating pipe must be mounted in accordance

with prevailing provisions.

4 Carry out any welding work required at a safe

distance from the boiler or before the boiler is fitted

4 Install a drain under the safety valve leading to the

sewage system ê.

4.6.4. Connection of the water circuit for

domestic use

1. Connect the cold water inlet pipe to the domestic cold water

connection k.

Connect the domestic hot water outlet pipe to the domestic hot water connection m.

CAUTION

4 The domestic water pipes must be connected in

accordance with prevailing provisions.

4 Carry out any welding work required at a safe

distance from the boiler or before the boiler is fitted

4 If using synthetic pipes, follow the manufacturer’s

(connection) instructions.

4.6.5. Connecting the expansion vessel

The boiler is fitted as standard with an 8-litre expansion vessel.

the water volume is greater than 100 litres or the static height of the system exceeds 5 metres, an additional expansion vessel must be fitted. Refer to the table below to determine the expansion vessel required for the installation.

Conditions of validity of the table:

4 3-bar safety valve

4 Average water temperature: 70 °C

Flow temperature: 80 °C Return temperature: 60 °C

4 The filling pressure in the system is lower than or equal to the initial

pressure in the expansion vessel

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Initial pressure of the expansion vessel

Volume of the expansion vessel depending on the volume of the installation (in litres)

100 125 150 175 200 250 300 > 300

0.5 bar 4,8 6,0 7,2 8,4 9,6 12,0 14,4 Volume of the installation x 0,048

1 bar

8,0

(1)

10,0 12,0 14,0 16,0 20,0 24,0 Volume of the installation x 0,080

1.5 bar 13,3 16,6 20,0 23,3 26,6 33,3 39,9 Volume of the installationx 0,133

(1) Factory configuration

4.6.6. Connecting

the condensate discharge pipe

The syphon is supplied separately as standard with the boiler (Includes flexible plastic drain hose

). Fit these parts underneath the

boiler. To do this, proceed as follows:

1. Fill the syphon with water up to the mark.

CAUTION

Fill the water siphon before starting the boiler to avoid combustion products escaping from the boiler.

Press the syphon firmly into the j opening provided for it underneath the boiler.

The syphon must click into place.

CAUTION

Check whether the syphon is solidly fitted in the boiler.

3. Mount

a standard drainage pipe, Ø 32 mm or more, leading to the

mains drainage system.

4. Mount the flow collector.

Insert the hoses from the siphon drain j and safety valve ê.

6. Mount a trap or a siphon in the discharge pipe.

CAUTION

Do not make a fixed connection owing to maintenance work on the siphon.

4 Do

not plug the condensate discharge pipe. Make an

open connection with the drain.

4 Set the discharge pipe at a gradient of at least 30 mm

per metre, maximum horizontal length 5 metres.

4 Do not drain condensation water into a roof gutter at

any time.

4 Connect the condensate discharge pipe in

accordance with prevailing standards.

T004860-B

T004868-D

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4.6.7. Automatic air bleed

Check that the automatic bleed valve is open: This is visible on the right on top of the boiler. If necessary, the air vent can be closed off with the cap that can be found next to it.

4.7

Gas connection

1. Connect the gas inlet pipe GAS / GAZ.

Connect the gas pipe to the gas shut off valve.

The diameters of the pipes must be defined in accordance with the standards in force in your country.

WARNING

4 Close the main gas valve before starting work on the

gas pipes.

4 Before mounting, check that the gas meter has

sufficient capacity. To do this, you should keep in mind the consumption of all domestic appliances.

4 If the gas meter has a too low capacity, inform the

energy supply company.

CAUTION

4 Connect the gas pipe in accordance with prevailing

standards and regulations.

4 Carry out any welding work required at a safe

distance from the boiler or before the boiler is fitted.

4 Ensure

that there is no dust in the gas pipe. Blow into

the pipe or shake it before mounting.

4 We recommend installing a gas filter on the gas pipe

to prevent clogging of the gas valve unit.

R000350-A

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4.8 Flue gas system connections

4.8.1. Classification

6 8

33(x)

43(x)

83(x)

43(x)

13(x)

83(x)

33(x)

23P

93(x)

C002339-C

Configuration B

Connection to a collective pipe via a concentric pipe (combustive air taken from the boiler room

) All of the pressurised parts of the appliance are surrounded by air.

Configuration B23 - B

23P

Connection to a chimney using a connection kit (combustive air taken from the boiler room

)

Configuration C

13(x)

Air/flue

gas connection by means of concentric pipes to a

horizontal terminal (so-called forced flue)

Configuration C

33(x)

Air/flue

gas connection by means of concentric pipes to a

vertical terminal (roof outlet)

Configuration C

43(x)

Air/flue gas connection to a collective conduit for watertight boilers (3CE P

system)

Configuration C

Air and flue gas connection separated by means of a biflow

adapter and single pipes (combustive air taken from

outside)

Configuration C

83(x)

Flue gas connection to a collective conduit for sealed boilers. The air supply is individual via a terminal coming from outside the building

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Configuration C

93(x)

Air/flue gas connection by concentric pipes in the boiler room and single pipes in the chimney (combustive air in counter current in the chimney)

Configuration C

93(x)

Air/flue gas connection by concentric pipes in the boiler room and single flex in the chimney (combustive air in counter current in the chimney)

WARNING

4 Only

factory components are authorised for

connecting the boiler and the terminal.

4 The clear section must comply with the

standard.

4 The chimney must be swept before the

installation of the evacuation conduit.

4.8.2. Lengths of the air/flue gas pipes

For configurations B23 and C93, the lengths given in the table are valid for horizontal conduits with a maximum length of 1 metre. For each additional metre of horizontal conduit, subtract 1.2 m from the vertical length Lmax

Type of air/flue gas connection Diameter Maximum length in metres

EMC-M

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

C13Concentric pipes connected to a

horizontal terminal

Alu or PPS 60/100 mm 7,0 7,0 3,0 3,0

80/125 mm 21,5 25,5 11,5 9,5

C33Concentric pipes connected to a

vertical terminal

Alu or PPS 60/100 mm 2,5 3,0 - -

80/125 mm 19,5 24,0 13,5 11,5

C93Concentric pipes in the boiler room

Single conduits in the chimney (combustive air in counter-current)

Alu or PPS 80/125 mm

80 mm (Rigid duct)

18,0 23,0 19,0 17,0

Concentric pipes in the boiler room Flexible single conduit in the chimney

PPS 60/100 mm

80 mm (Flexible duct)

19,0 21,0 6,5 4,5

80/125 mm 80 mm (Flexible duct)

20,0 25,0 15,0 13,0

C53Bi-flow adapter and separate single

air/flue gas ducts (combustive air taken from outside)

Alu 60/100 mm

2 x 80 mm

40,0 40,0 21,5 18,0

B23Chimney (rigid or flexible duct in

chimney, combustive air taken from the premises)

PPS 80 mm (Rigid duct) 40,0 40,0 21,0 17,0

80 mm (Flexible duct) 31,0 32,0 13,0 10,0

C43Collective conduit for sealed boiler (3

CEP)

(1)

To determine the size of such a system, consult the supplier of the 3 CEP

conduit.

(1) The boiler’s parameter settings will need to be changed. ¼For more detailed information, see chapter:

"Changing the settings", page

45.

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WARNING

Maximum length = lengths of the straight air/flue gas ducts + equivalent lengths of other components

The max length in the flue gas pipe (configurations C93, B

23P

) of the

elbow bracket at the outlet must not exceed:

4 30 m for rigid PPS

4 25 m for flexible PPS

longer lengths are used, holding clamps must be added per sections

of 25 or 30 metres.

For the list of flue gas system accessories and the equivalent lengths, refer to the current price list.

4.8.3. Additional Directives

4 Please refer to the manufacturer’s instructions for the material in

question when installing the flue gas discharge and air supply materials.

If the flue gas discharge and air supply materials are not installed according to the instructions (e.g. they are not leakproof, not clamped in place etc.), this may cause hazardous situations and/or result in bodily injury. After assembly, check at least all flue gas and air–carrying parts for tightness.

4 Connection of the combustion gas exhaust directly to the buildings

brick chimneys or flues is forbidden for condensation reasons.

4 Always clean the ducts thoroughly in cases where lining pipes are

used and/or a connection of the air-supply.

4 It must be possible to inspect the flue or chimney.

4 In cases where condensate coming from the stainless steel or

plastic sections of the flue gas pipe can be driven back towards the aluminium section, this condensate must be removed using a collecting device before the aluminium section is reached.

4 For long, aluminium, combustion-gas exhaust pipes it is initially

necessary to consider the relatively high quantity of corrosive products which are brought together with the condensate from the exhaust pipe. The siphon on the equipment requires regular cleaning or, preferably, an additional condensate collector can be installed above the equipment.

4 The combusted gas discharge pipe must be sufficiently inclined

towards the boiler (at least 50 mm per metre) and an adequate condensate collection tank and discharge system constructed (at least 1 m before the boiler opening). The elbows fitted must be at more than 90° to guarantee the provision of an adequate gradient and tightness on the lip rings.

Please contact us for further information.

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4.9 Electrical connections

4.9.1. Control unit

The boiler is not line- and neutral sensitive. The control unit is fully integrated with the fan, venturi and gas block.

The boiler is fully prewired. The PCB has a connection to the connection box with instrument panel, via the HMI connector. The PCB has a RS232 connection for a PC/laptop via the RS232 connector. The main characteristics of the control unit are described in the table below.

Power supply voltage

230 VAC/50Hz

Fuse rating F1 (230 VAC) 1,6 AT

The boiler is fitted with a 3-wire power supply cable (cable length 1,5 m) suitable for a 230VAC/50Hz

power supply with phase/neutral/ earth system. The power supply cable is connected to the MAINS connector. A spare fuse can be found in the housing of the control system.

WARNING

Use an isolating transformer for connection values other than those stated above.

CAUTION

4 When the power supply cable has to be replaced, it

must be ordered from DeDietrich. The power supply cable should only be replaced by DeDietrich, or by an installer certified by DeDietrich.

4 The switch must be easily accessible

4.9.2. Recommendations

WARNING

4 Only

qualified professionnals may carry out electrical

connections, always with the power off.

4 The boiler is entirely pre-wired. Do not modify the

connections inside the control panel.

4 Earth the appliance before making any electrical

connections.

Make the electrical connections of the boiler according to:

4 The instructions of the prevailing standards.

4 The instructions on the electrical diagrams provided with the

boiler.

4 The recommendations in the instructions.

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CAUTION

4 Separate the sensor cables from the 230 V cables.

4 Outside the boiler: Use 2 pipes or cable guides at

least 10 cm apart.

4.9.3. PC/Laptop connection

The PCB for the automatic control unit has a RS232

connection for a PC/laptop via the RS232 connector (This connection is therefore not in the connection box). Using the Recom service software, you can enter, change and read out various boiler settings.

4.9.4. Connecting service tool

The PCB for the automatic control unit has a HMI connection. This connection is used to connect the control panel for the boiler. Connector HMI is also used to connect the service tool

(Accessory). Herewith various settings can be imported, changed and exported. For example:

4 Temperature display.

4 Number of operating hours.

4 State boiler.

4 Parameter settings.

For the installation or mounting of any accessories, refer to the

mounting instructions delivered with the accessories in

question.

T005415-A

T005416-A

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4.9.5. Access to the connector block

The connection box with instrument panel is supplied separately as standard

with this unit. The connection box must be connected to the automatic control unit using the cable supplied. To do this, proceed as follows:

The cable with the plug from the automatic control unit exits underneath the boiler.

1. Carefully

open the latch on the rear of the connection box using a

screwdriver.

2. Open the cover of the connection box.

3. Disconnect a pull relief clip. Turn the pull relief clip round.

4. Insert the plug from the cable into the HMI plug on the PCB for the

connection box.

5. Press the pull relief clip firmly into place.

6. Now connect the required external controllers to the remaining

connectors. To do this, proceed as follows:

- Disconnect a pull relief clip.

- Turn the pull relief clip round.

- Place the cable underneath the pull relief clip.

- Press the pull relief clip firmly into place.

- Connect the connection box and check that the box is sealed properly.

7. Slide the User instruction card supplied into the guides underneath

the connection box.

8. Slide the connection box into the guides underneath the boiler

once all the connections have been made.

9. Secure the connection box using the screw found in the guides.

The connection box can also be attached to the wall using the screw holes on the back of the connection box.

The connection box should be screwed to the wall using the point indicated inside it.

The connection options for the PCB are explained in the following paragraphs.

4.9.6.

Connection options

Various thermostats and controllers can be connected to the control PCB:

Connecting modulating controller

The boiler is fitted with a OpenTherm connection as standard.

As a result, modulating OpenTherm controllers can be connected without further modifications.

The boiler is also suitable for

OpenTherm Smart Power.

4 In the case of a room temperature controller or a controller with

room temperature compensation, fit the controller in a reference area (generally the living room).

R000411-B

SCU HMI OT

On/ofBUS BUS

R000450-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

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Page 32

4 Connect the two-wire cable to terminals On/off-OT of the

connector.

4 The boiler can also be put into operation without a controller.

To do so, connect the bridge (supplied) to the terminals On/off-OT of the connector.

Connect on/off thermostat

The boiler is suitable for connecting a 2 wire on/off room thermostat or weather compensator.

4 In the case of a room temperature controller or a controller with

room temperature compensation, fit the controller in a reference area (generally the living room).

4 Connect the 2 wire room thermostat to the On/off-OT terminals

of the connector.

4 The boiler can also be put into operation without a controller. To

do so, connect the bridge (supplied) to the terminals On/off-OT of the connector.

Connecting the outside temperature sensor

4 An outside sensor can be connected to the Tout terminals of the

connector. In the case of an on/off thermostat, the boiler will control the temperature with the set point from the internal heating curve.

4 The boiler can also be put into operation without a controller. To

do so, connect the bridge (supplied) to the terminals On/off-OT of the connector. In this case the boiler will control the temperature with the set point from the internal heating curve.

CAUTION

Check whether the outside sensor is suitable for this boiler. A suitable outside sensor can be obtained as an accessory.

A OpenTherm controller can also use this outside sensor. The heating curve required must then be set on the controller.

Heating curve setting

an outside temperature sensor is connected, it is possible to adapt

the heating curve. The setting can be modified using parameters p1, p"5, p"6 and p"7.

R000450-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000451-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000038-A

0 10 20

-20

-10

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Connect frost protection

Frost protection in combination with on/off thermostat

If an on/off thermostat is used, it is advisable to protect any rooms where there is risk of frost by using a frost thermostat. The radiator valve

in a room where there is a risk of frost must, however, be open.

4 In rooms where there is a risk of frost, a frost thermostat (Tv)

should preferably be installed.

4 Connect the frost thermostat in parallel with an on/off room

thermostat (Tk) to the On/off-OT terminals of the connector.

When using a OpenTherm thermostat, a frost thermostat cannot be connected in parallel to the On/off - OT terminals.

Implement frost protection for the central heating

system in combination with an external sensor.

Frost protection in combination with an outside sensor

The central heating system can also be protected against frost in combination with an outside sensor.

The radiator valve in a room where there is a risk of frost must, however, be open. Connect the outside sensor to the Tout terminals of the connector. The frost protection functions as follows where an outside sensor is used:

4 At an outside temperature lower than -10°C (can be set with

parameter p30): the circulation pump switches on.

4 At an outside temperature higher than -10°C (can be set with

parameter p30): the circulation pump continues to run and then switches off.

Connecting the calorifier sensor/thermostat

Connect the calorifier sensor or thermostat to the Tdhw terminals of the connector.

Operation signal and failure signal (Status)

The alarm or operation signal is selected using parameter p40.

4 If the boiler is operating, the operation signal can be switched via

a potential-free contact (maximum 230 VAC, 1 A) on the No and C terminals of the connector.

4 If the boiler locks out, the alarm can be transmitted via a potential-

free contact (maximum 230 VAC, 1 A) on the Nc and C terminals of the connector.

4 The external 3-way valve (230 VAC, 1 A) can be used when

connecting an indirectly heated calorifier via a volt-free contact. The neutral position of the three-way valve can be set using parameter p34. The three-way valve is connected as follows:

- Nc = Central heating

R000450-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000452-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000453-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

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- No = Domestic hot water

- C = Phase on

Connect on/off contact (Enable)

10-230 V signal can be connected to the CH and DHW connectors to switch the production of heating water or sanitary warm water on or off.

DANGER

If the power to the boiler is interrupted, a voltage will still be present at connectors CH and DHW.

The production of heating water or domestic hot water is switched on as standard.

The automatic control unit will only respond to the switch and control the heating/ domestic hot water function once a 10-230 V signal has been connected to the connectors. If the power to the boiler is interrupted, the status of the CH and DHW input will be reset to the factory setting (= enabled). Check whether this is the status required.

Shutdown input

external gas pressure switch, for example, or a safety thermostat for an underfloor heating unit can be connected to the BL connector. This connection replaces the connection to the BL connector.

CAUTION

The connection must be potential-free.

Connecting control panel

The control panel for the boiler is connected to connector BUS HMI.

¼See chapter: "Access to the connector block", page 29

Connections for optional control PCBs

Connector BUS SCU is used to communicate with optional control PCBs. These control PCBs are used for a range of accessories.

For the installation or mounting of any accessories, refer to the mounting instructions delivered with the accessories in question.

R000454-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000455-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000448-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

R000449-A

1234 56 34 12 12123

On/off

Enable

+ - + -

DHW

Status

C No

Tout

Tdhw

SCU

BUS

HMI

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4.10 Electrical diagram

R000291-A

230V, 50Hz

L N

MAINS

1 32

GN/ YW

RS232

3 1

PSU

TATRFS

6 7 8 9 10 11 12 131 2 3 5

SENSORS

HMI

MAINS

SENSORS

PUMP PWM

PUMP

3WV

RS232

PUMP

PUMP A

1 2 3

GN/ YW

3WV

1 2 3

1 3 2

PUMP

1 2 3 4

BK BK

PWM

RS232

Connecting a computer

PUMP A

Shunt pump

Return sensor

Ignition transformer

3WV

3-way valve

Flow sensor

Ignition/ionization electrode

Safety thermostat

PSU

Storage parameter

Power supply

Flow switch

HMI

Connection box

4.11 Filling the system

4.11.1. Water treatment

In most cases, the boiler and the central heating installation can be filled

with normal tap water and no water treatment will be necessary.

WARNING

Do not add chemical products to the central heating water without

first consulting a water treatment professional. For example: antifreeze, water softeners, products to increase or reduce the pH value, chemical additives and/or inhibitors. These may cause faults in the boiler and damage the heat exchanger.

Rinse the central heating installation with at least 3x the volume of the central heating installation.

Flush the DHW

pipes with at least 20 times the volume of the pipes.

For an optimum functioning of the boiler, the water of the installation must comply with following characteristics:

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Page 36

Total installed heat output (kW)

≤ 70

70 - 200 200 - 550 > 550

Degree of acidity (water non-treated)

pH 7 - 9 7 - 9 7 - 9 7 - 9

Degree of acidity (water treated)

pH 7 - 8,5 7 - 8,5 7 - 8,5 7 - 8,5

Conductivity at 25°C µS/cm ≤ 800 ≤ 800 ≤ 800 ≤ 800

Chlorides mg/l ≤ 150 ≤ 150 ≤ 150 ≤ 150

Other components mg/l < 1 < 1 < 1 < 1

Total water hardness

(1)

°f 1 - 35 1 - 20 1 - 15 1 - 5

°dH 0,5 - 20,0 0,5 - 11,2 0,5 - 8,4 0,5 - 2,8

mmol/l 0,1 - 3,5 0,1 - 2,0 0,1 - 1,5 0,1 - 0,5

(1) For

installations that are heated at constant high temperatures with a total installed heat output; up to 200 kW a maximum total water hardness

of 8,4 °dH (1,5 mmol/l, 15 °f) applies and for above 200 kW a maximum total water hardness of 2,8 °dH (0,5 mmol/l, 5 °f) applies

If a water treatment is necessary, De Dietrich Thermique recommends the following manufacturers:

4 Cillit

4 Climalife

4 Fernox

4 Permo

4 Sentinel

4.11.2. Filling the siphon

Check whether the syphon is filled up to the mark. If the syphon has to be topped up, proceed as follows:

CAUTION

First remove the front housing of the boiler so that you can disconnect the syphon.

¼See paragraph:

"Open the boiler", page 50

1. Move the lever underneath the hydroblock to the right to disconnect the syphon.

Remove the siphon and clean it.

3. Replace the seal ring for the syphon.

4. Fill the syphon with water up to the mark.

Press the syphon firmly into the j opening provided for it underneath the boiler. The syphon must click into place.

6. Check whether the syphon is solidly fitted in the boiler.

CAUTION

Fill the water siphon before starting the boiler to avoid combustion products escaping from the boiler.

R000447-B

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Page 37

4.11.3. Filling the system

CAUTION

4 Before filling, open the valves on every radiator in the

installation.

4 Ensure that the boiler is switched off.

1. Open the central heating shut-off valves underneath the boiler.

Open the cock from the filling loop (During filling, air can escape from the system via the automatic air vent).

3. Turn off the tap on the filling loop if the pressure gauge indicates a pressure between 1,5 and 2 bar.

4. Check the tightness of the water connections.

5. Turn the boiler on.

After the power is switched on, the boiler always runs through an automatic venting programme lasting approx. 4 minutes (During filling, air can escape from the system via the automatic air vent). If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2 bar).

CAUTION

When venting, ensure that no water enters or makes contact with the casing and electrical parts of the boiler.

4.11.4. Venting the 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.

2. Set the room thermostat as high as possible.

3. Wait until the radiators are hot.

4. Ensure that the boiler is switched off.

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

T000181-B

R000441-B

0 120

100

°C

bar

T000181-B

T000155-A

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

Open the bleed connection using the bleed key provided whilst keeping a rag pressed against the bleed connection.

CAUTION

The water may still be hot.

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

Turn the boiler on. A vent cycle of a duration of around 4 minutes is carried out automatically.

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

If the water pressure is lower than 0,8 bar, more water should

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

See chapter: "Filling the system", page 35

11.Set the room thermostat or the regulator.

R000347-A

R000348-A

4. Installation EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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Page 39

5 Commissioning

5.1 Connection box

5.1.1. Control panel

Sanitary hot water temperature rotary knob

Heating water temperature rotary knob

Sweep key B and Status signals

RESET-button and on/off signal

The instrument panel for the connection box has 2

push buttons with signals. The signals provide information about the operating condition of the boiler. The RESET button lights up green when the boiler is connected to the mains. The status signal for the B button can flash in a range of colours and at different frequencies. The meaning of these signals can be found in the User instruction card supplied with

the boiler. ¼See also: "User instruction card", page 76

CAUTION

The instruction card must be slid underneath the connection box after the boiler installation or use of the card.

The instrument panel for the connection box also has 2 rotary knobs.

The N rotary knob can be used to set the temperature of the

sanitary warm water. The D rotary knob can be used to set the maximum flow temperature of the heating water. The heating/ domestic hot water function can be switched off by turning the rotary knob to position off.

CAUTION

The temperature of domestic hot water and central heating water is limited by the maximum values set under parameters p1 and p2.

¼See chapter: "Parameter descriptions", page

T002247-D

321 4

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5.2 Check points before commissioning

5.2.1. Preparing the boiler for commissioning

WARNING

Do not put the boiler into operation if the supplied gas is not in accordance with the approved gas types.

Preparatory procedure for boiler commissioning:

4 Check

that the gas type supplied matches the data shown on the

boiler’s data plate.

4 Change the settings for the gas block if the gas type supplied and/

or the inlet gas pressure do not correspond to the factory settings for the boiler.

¼See chapter: "Gas settings", page 40

4 Check the hydraulic circuit.

4 Check the water pressure in the heating system.

4 Check the electrical connections to the thermostat and the other

external controls.

4 Check the other connections.

4 Test the boiler at full load. Check the setting of the gas/air ratio

and, if necessary, correct it.

4 Test the boiler at part load. Check the setting of the gas/air ratio

and, if necessary, correct it.

4 Finalizing work.

5.2.2. Hydraulic circuit

4 Use

the pressure gauge to check the water pressure in the heating system. The hydraulic pressure must reach a minimum of 0,8 bar. If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2 bar).

4 Check the condensate discharge siphon; it must be filled with

clean water up to the mark.

4 Check that there are no leaks on the hydraulic connections.

5.2.3. Electrical connections

4 Check the electrical connections.

5. Commissioning EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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5.3 Commissioning the boiler

WARNING

Initial commissioning must be done by a qualified professional.

CAUTION

On first firing the boiler, a smell may be present for a short period.

1. Open the main gas supply.

Turn the boiler on.

3. Open the gas valve on the boiler.

4. Set the controls (thermostats, control system) so that they request heat.

5. The boiler will begin an automatic venting-programme (which lasts approx. 4 minutes) and will do this every time the power supply is isolated. Both push buttons on the instrument panel light up green during the venting cycle.

6. Check the boiler pump venting. Remove the middle screw if necessary before venting the pump (Central heating pump).

7. Check the gas connections into and out of the gas block in the boiler for tightness.

The current operating condition of the boiler is shown by the status signal on the instrument panel. The status signal for the B button can flash in a range of colours and at different frequencies. The meaning of these signals can be found in the User instruction card supplied with the boiler. See also:

¼ "User instruction card", page 76 ¼ "Error codes", page 60

Error during the start-up procedure:

4 Both buttons on the instrument panel are in the out position:

- Check the mains supply voltage

- Check the main fuses

- Check the connection cable to the connection box.

- Check the fuses on the control panel: (F1 = 1,6 AT 230VAC)

- Check the connection between the mains lead and the

MAINS connector for the automatic control unit.

4 In the event of a fault, the status signal for the B button flashes

red. Press the J button for 5 seconds to restart the boiler.

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5.4 Gas settings

5.4.1. Gas circuit

WARNING

Ensure that the boiler is switched off.

1. Remove the front panel.

See paragraph:

"Open the boiler", page 50

2. Check that the boiler is properly set for the type of gas used (See the identification plate on top of the boiler ).

WARNING

To ascertain the gas types permitted, see chapter:

"Technical specifications", page

3. Open the main gas supply.

Open the gas valve on the boiler.

5. Check the gas supply pressure at the pressure outlet C on the gas valve unit. The pressure must be the same as the one shown on the rating plate.

The boiler is supplied with two types of gas blocks. See the diagram for the position of measuring point C for the inlet gas pressure.

6. Purge the gas supply pipe within the boiler by unscrewing the pressure outlet on the gas block.

Tighten the measurement point

when the pipe has been sufficiently purged.

7. Check the leak tightness of the gas pipe, including the gas block.

5.4.2. Adapting to another gas type

The boiler is preset in the factory to operate on natural gas H (G20).

If the boiler is converted, for example, to:

4 G25 (Gas L)

4 G31 (Propane)

It is necessary to mention on the sticker provided:

This

boiler has been set for.... This sticker must be affixed to the

top of the boiler next to the identification plate.

WARNING

Only a qualified engineer may carry out the following operations.

T003759-C

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For conversion to propane

4 Set the volume flow of the fan as indicated in the parameter

table (if required). The setting can be modified using parameters p17, p18, p19 and p20.

¼See chapter: "Parameter descriptions", page

4 Coarsely adjust the gas flow rate using the adjustment screw A on

the gas block.

The boiler is supplied with two types of gas blocks. See drawing for the position of control screw A for a full load.

Boiler type Gas block 1 Gas block 2 Operational mode

EMC-M 24 EMC-M 24/28MI Plus

R000475-A

R000476-A

Gas block 1

4 Turn the adjustment screw A clockwise until it reaches the stop.

4 Turn the adjustment screw A 4 ½ rotations counter clockwise

Gas block 2

4 Turn the adjustment screw A clockwise until it reaches the stop.

4 Turn the adjustment screw A 3 ½ rotations counter clockwise

EMC-M 30/35 MI EMC-M 34/39 MI

R000475-A

R000476-A

Gas block 1

4 Turn the adjustment screw A clockwise until it reaches the stop.

4 Turn the adjustment screw A 5 ¼ rotations counter clockwise

Gas block 2

4 Turn the adjustment screw A clockwise until it reaches the stop.

4 Turn the adjustment screw A 4 rotations counter clockwise

4 Then adjust the gas flow rate accurately

¼See chapter: "Setting the air/gas ratio (Full load)", page 41

¼See chapter: "Setting the air/gas ratio (Part load)", page 43

5.4.3. Setting the air/gas ratio (Full load)

1. Unscrew the plug of the flue gas measurement point.

Connect the flue gas analyser.

WARNING

Ensure that the opening around the sensor is completely sealed when taking measurements.

T003127-B

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3. Set the boiler to full load: Continue

pressing for around 3 seconds on the B key. The status signal for the B button is orange and always flashes green briefly; The low speed mode is parameterised.

Press the B button again 2 times. The status signal for the

button is orange and always goes off briefly 2 times; Full load is set.

The full load status can only be reached via the part load status.

4. Measure the percentage of O2 or CO2 in the flue gases (Front panel removed

The boiler is supplied with two types of gas blocks. See drawing for the position of control screw A for a full load.

5. If this rate does not match the required value, correct the gas/air ratio using the adjustment screw A on the gas valve unit: If the level is too high, turn the screw A clockwise to reduce the gas flow rate. If the level is too low, turn the screw A anti-clockwise to increase the gas flow rate.

O2/ CO2 control and setting values at full load for

G20 (Gas H)

Boiler type Setting value Checking value

O2 (%) CO2 (%) O2 (%) CO2 (%)

EMC-M 24 4,3 ± 0,3 9,3 ± 0,1 4,3 ± 0,5 9,3 ± 0,3

EMC-M 24/28 MI 4,3 ± 0,3 9,3 ± 0,1 4,3 ± 0,5 9,3 ± 0,3

EMC-M 30/35 MI 4,3 ± 0,3 9,3 ± 0,1 4,3 ± 0,5 9,3 ± 0,3

EMC-M 34/39 MI 4,3 ± 0,3 9,3 ± 0,1 4,3 ± 0,5 9,3 ± 0,3

O2/ CO2 control and setting values at full load for

G25 (Gas L)

Boiler type Setting value Checking value

O2 (%) CO2 (%) O2 (%) CO2 (%)

EMC-M 24 4,0 ± 0,3 9,3 ± 0,1 4,0 ± 0,5 9,3 ± 0,3

EMC-M 24/28 MI 4,0 ± 0,3 9,3 ± 0,1 4,0 ± 0,5 9,3 ± 0,3

EMC-M 30/35 MI 4,0 ± 0,3 9,3 ± 0,1 4,0 ± 0,5 9,3 ± 0,3

EMC-M 34/39 MI 4,0 ± 0,3 9,3 ± 0,1 4,0 ± 0,5 9,3 ± 0,3

O2/ CO2 control and setting values at full load for

G31 (Propane)

Boiler type Setting value Checking value

O2 (%) CO2 (%) O2 (%) CO2 (%)

EMC-M 24 5,2 ± 0,3 10,3 ± 0,1 5,2 ± 0,5 10,3 ± 0,3

EMC-M 24/28 MI 5,2 ± 0,3 10,3 ± 0,1 5,2 ± 0,5 10,3 ± 0,3

EMC-M 30/35 MI 5,2 ± 0,3 10,3 ± 0,1 5,2 ± 0,5 10,3 ± 0,3

EMC-M 34/39 MI 5,2 ± 0,3 10,3 ± 0,1 5,2 ± 0,5 10,3 ± 0,3

R000402-A

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5.4.4. Setting the air/gas ratio (Part load)

1. Unscrew the plug of the flue gas measurement point.

Connect the flue gas analyser.

WARNING

Ensure that the opening around the sensor is completely sealed when taking measurements.

3. Set the boiler to part load: Continue

pressing for around 3 seconds on the B key. The status signal for the B button is orange and always flashes green briefly; The low speed mode is parameterised.

4. Measure the percentage of O2 or CO2 in the flue gases (Front panel removed).

4 The boiler is supplied with two types of gas blocks.

See drawing for the position of control screw B for a low load.

5. If this rate does not match the required value, correct the gas/air ratio using the adjustment screw B on the gas valve unit: If the rate is too low, turn the screw B clockwise to increase the gas flow. If the rate is too high, turn the screw B anti-clockwise to reduce the gas flow.

Repeat the high speed test and the low speed test as often as necessary until the correct values are obtained without having to make additional adjustments

. Briefly press the B button to switch

from full load to part load or vice versa. Briefly press the RESET button to return the boiler to normal operating status.

O2/ CO2 control and setting values at part load for

G20 (Gas H)

Boiler type Setting value Checking value

O2 (%) CO2 (%) O2 (%) CO2 (%)

EMC-M 24 5,0 ± 0,3 8,9 ± 0,1 5,0 ± 0,5 8,9 ± 0,3

EMC-M 24/28 MI 5,0 ± 0,3 8,9 ± 0,1 5,0 ± 0,5 8,9 ± 0,3

EMC-M 30/35 MI 5,0 ± 0,3 8,9 ± 0,1 5,0 ± 0,5 8,9 ± 0,3

EMC-M 34/39 MI 5,0 ± 0,3 8,9 ± 0,1 5,0 ± 0,5 8,9 ± 0,3

O2/ CO2 control and setting values at part load for

G25 (Gas L)

Boiler type Setting value Checking value

O2 (%) CO2 (%) O2 (%) CO2 (%)

EMC-M 24 5,2 ± 0,3 8,9 ± 0,1 5,2 ± 0,5 8,9 ± 0,3

EMC-M 24/28 MI 5,2 ± 0,3 8,9 ± 0,1 5,2 ± 0,5 8,9 ± 0,3

EMC-M 30/35 MI 5,2 ± 0,3 8,9 ± 0,1 5,2 ± 0,5 8,9 ± 0,3

EMC-M 34/39 MI 5,2 ± 0,3 8,9 ± 0,1 5,2 ± 0,5 8,9 ± 0,3

O2/ CO2 control and setting values at part load for

G31 (Propane)

Boiler type Setting value Checking value

O2 (%) CO2 (%) O2 (%) CO2 (%)

EMC-M 24 5,8 ± 0,3 9,9 ± 0,1 5,8 ± 0,5 9,9 ± 0,3

T003127-B

R000456-A

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Page 46

O2/ CO2 control and setting values at part load for

G31 (Propane)

EMC-M 24/28 MI 5,8 ± 0,3 9,9 ± 0,1 5,8 ± 0,5 9,9 ± 0,3

EMC-M 30/35 MI 5,8 ± 0,3 9,9 ± 0,1 5,8 ± 0,5 9,9 ± 0,3

EMC-M 34/39 MI 5,8 ± 0,3 9,9 ± 0,1 5,8 ± 0,5 9,9 ± 0,3

5.5 Finalizing work

1. Remove the measuring equipment.

Put the flue gas sampling plug back in place.

3. Refit the front panel.

4. Raise the temperature in the heating system to approximately 70°C.

5. Shut down the boiler.

6. After about 10 minutes, vent the air in the heating system.

7. Switch on the boiler.

8. Check the tightness of the flue gases evacuation and air inlet connections.

9. Checking the hydraulic pressure. If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2 bar).

10.Tick the gas category used on the data plate.

11.Explain the operation of the installation, the boiler and the regulator to the users.

12.Slide the User instruction card supplied into the guides underneath the connection box.

13.Give all the instruction manuals to the user.

5.6 Reading out measured values

5.6.1. Status and sub-status

Boiler status information can be read using a service tool. The information menu Q gives the following status and sub-status numbers:

State 5t Sub-status 5v 0

Rest

Boiler start (Heat demand)

Anti-hunting

Control three-way valve

Start pump

Wait for the correct temperatures for burner start

T001522-A

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State 5t Sub-status 5v 2

Burner start

Open flue gas damper/external gas valve

Increase fan speed

Pre-ventilation

Wait for release signal

Burner on

Pre-ignition

Main ignition

Flame detection

Intermediate ventilation

3 / 4 Burner for central heating operation / DHW System

Temperature control

Limited temperature control (ΔT safety)

Output control

Increase protection level 1 (Modulate down)

Increase protection level 2 (Part load)

Increase protection level 3 (Blockage)

Modulate up for flame control

Temperature stabilisation time

Cold start

Burner stop

Burner off

Post ventilation

Close flue gas damper/external gas valve

Recirculation protection

Stop fan

Boiler stop (End of heat demand)

Pump post circulation

Pump off

Control three-way valve

Start anti-hunting

Control stop

Wait for burner start

Anti-hunting

Blocking

Shutdown code xx

Bleed

Rest

Control three-way valve

Start pump

Pump off

Control three-way valve

5.7 Changing the settings

The boiler control panel is set for the most common heating systems. With

these settings, practically all heating systems operate correctly. The user or installer can optimise the parameters according to own preferences.

Parameters can be adjusted using a service tool.

Parameters p"7 and p30 can also be set to a negative value. This

negative value can be read or changed directly using Recom. If you are using the service tool or a suitable controller, this negative value is not displayed. Use the following formula to read or change the required negative value: Setting value - 256 = Desired value

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Setting value 0 = Desired value 0

Desired value

0 -1 -5 -10 -15 -20 -25 -30

Setting value

0 255 251 246 241 236 231 226

5.7.1. Parameter descriptions

Parameter Description Adjustment range

Factory setting

EMC-M

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

Flow temperature: T

SET

20 to 90 °C

80 80 80 80

Domestic hot water temperature: T

SET

40 to 65 °C

55 55 55 55

Heating / DHW mode

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

/ DHW activated

1 1 1 1

ECO mode

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

thermostat

2 2 2 2

Post-circulation of the pump

1 to 98 minutes 99 minutes = continuous

2 2 2 2

p17

Maximum fan volume flow (Heating)

G20 (Gas H)

(1)

(x100)

47 39 60 60

G25 (Gas L) (x100) 47 39 60 60

G31 (Propane) (x100) 46 39 60 60

p18

Maximum fan volume flow (DHW)

G20 (Gas H)

(1)

(x100)

47 56 70 78

G25 (Gas L) (x100) 47 56 70 78

G31 (Propane) (x100) 46 50 69 71

p19

Minimum fan volume flow (Heating+DHW)

G20 (Gas H)

(1)

(x100)

11 11 15 15

G25 (Gas L) (x100) 11 11 15 15

G31 (Propane) (x100) 14 14 20 20

CLV overpressure (combusted gas discharge systems)

(2)

G25 (Gas L) (x100)

15 15 18 18

CLV overpressure (combusted gas discharge systems)

(2)

G20 (Gas H) (x100)

15 15 18 18

CLV overpressure (combusted gas discharge systems)

(2)

G31 (Propane) (x100)

15 15 20 20

(1) Do not modify these factory settings unless absolutely necessary. E.g. to adapt the boiler to: G25 (Gas L) or G31 (Propane) (2)

Please contact us for further information

5. Commissioning EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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Parameter Description Adjustment range

Factory setting

EMC-M

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

p20

Minimum fan volume flow (offset)

G20 (Gas H)

(1)

80 80 60 60

G25 (Gas L) 80 80 60 60

G31 (Propane) 20 20 0 0

CLV overpressure (combusted gas discharge systems)

(2)

G25 (Gas L)

0 0 60 60

CLV overpressure (combusted gas discharge systems)

(2)

G20 (Gas H)

0 0 60 60

CLV overpressure (combusted gas discharge systems)

(2)

G31 (Propane)

0 0 0 0

p21

Starting volume flow Do not modify (x100) 23 23 30 30

p23

Maximum flow temperature of system

20 to 90 °C

90 90 90 90

p24

Time factor of average flow calculation

Do not modify (x10 seconds)

35 35 35 35

p25

Heat curve set point (Maximum outside temperature

)

0 to 30 °C (Only with an outside temperature sensor

)

20 20 20 20

p26

Heat curve set point (Flow temperature)

0 to 90 °C (Only with an outside temperature sensor

)

20 20 20 20

p27

Heat curve set point (Minimum outside temperature

)

-30 to 0 °C (Only with an outside temperature sensor

)

-15 -15 -15 -15

p28

Minimum pump speed for central heating operation

(Setting the

pump speed)

2 - 10 (x 10 %)

3 3 3 3

p29

Maximum pump speed for central heating operation (Setting the pump speed)

2 - 10 (x 10 %)

10 7 10 10

p30

Antifreeze temperature from - 30 to 0°C -10 -10 -10 -10

p31

Legionella protection

0 = Stop 1 = Start (After commissioning, the boiler

will operate once a week at

65°C for

DHW) 2 = Management using a programmable

thermostat

0 0 0 0

p32

Set point increase for calorifier 0 to 25 °C 20 20 20 20

p33

DHW cut-in temperature DHW sensor

from 2 to 15°C 4 4 4 4

p34

Control of external 3-way valve (Accessory)

0 = Normal 1 = Reverse

0 0 0 0

p35

Boiler type

0 = Heating and instant domestic hot water 1 = Heating only

1 0 0 0

p36

Shutdown input function

1 = Shutdown without frost-protection 2 = Shutdown with frost protection 3 = Lock-out with frost protection (Pump

only)

1 1 1 1

p37

Minimum gas pressure switch (GpS)

0 = Not connected 1 = Connected

0 0 0 0

p38

Heat recovery unit (HRU)

0 = Not connected 1 = Connected

0 0 0 0

(1) Do not modify these factory settings unless absolutely necessary. E.g. to adapt the boiler to: G25 (Gas L) or G31 (Propane) (2) Please contact us for further information

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 5. Commissioning

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Parameter Description Adjustment range

Factory setting

EMC-M

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

p39

Flue gas damper running time 0 to 255 seconds 0 0 0 0

p40

Fault relay function

0 = Operation signal 1 = Alarm signal 2 = External 3-way valve

2 2 2 2

p41

Maintenance message Do not modify 1 1 1 1

p42

Service operating hours Do not modify 175 175 175 175

p43

Service burning hours Do not modify 30 30 30 30

p44

Venting cycle

0 = Stop 1 = Multiple speed pump 2 = Modulating pump

1 1 1 1

(1) Do not modify these factory settings unless absolutely necessary. E.g. to adapt the boiler to: G25 (Gas L) or G31 (Propane) (2)

Please contact us for further information

5.7.2. Setting the maximum heat input for central

heating operation

EMC-M 24

Maximum heat input

Factory setting

Power input (kW)

Fan volume flow

EMC-M 24/48 MI

Maximum heat input

Factory setting

Power input (kW)

Fan volume flow

EMC-M 30/35 MI

Maximum heat input

Factory setting

Power input (kW)

Fan volume flow

EMC-M 34/39 MI

Maximum heat input

Factory setting

Power input (kW)

Fan volume flow

See graphs for the input/volume flow ratio for natural gas. The

volume

flow can be changed using the p17 parameter.

R000399-B

1000

2000 3000 4000 5000 6000

8000

7000

4700

F=M

R000398-B

1000

2000 3000 4000 5000 6000

8000

7000

47003

900

R000412-B

1000

2000 3000 4000 5000 6000

8000

7000

F=M

R000397-B

1000

2000 3000 4000 5000 6000

8000

000

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6 Switching off the boiler

6.1 Installation shutdown

If the central heating system is not used for a long period, we recommend switching the boiler off.

4 Switch off the boiler electrical power supply.

4 Shut off the gas supply.

4 Ensure that the boiler and system are protected against frost

damage.

6.2

Antifreeze protection

CAUTION

Drain the boiler and central heating system if you are not going

to use your home or the building for a long time and

there is a chance of frost.

Set the temperature control low, for example at 10°C.

To prevent radiators and the system from freezing in rooms where there is a risk of frost (e.g. a garage or storage room), a frost thermostat or outside sensor can be connected to the boiler.

¼See also: "Connection options", page

29.

CAUTION

4 The antifreeze protection does not function if the

boiler is switched off.

4 The integrated protection system only protects the

boiler, not the installation.

4 Open the valves on all radiators connected to the

heating system

4 If

the boiler has been placed in a room at risk of frost, the condensate drain and syphon should preferably be protected against freezing with a frost protection cable.

When the heating water temperature in the boiler falls by too much, the

integrated protection system in the boiler starts up. This protection

functions as follows:

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

up.

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

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

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

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7 Checking and maintenance

7.1 General instructions

WARNING

4 Maintenance operations must be done by a qualified

engineer.

4 An annual inspection is compulsory.

4 Only original spare parts must be used.

4 Have

the flues swept at least once a year or more, depending on the regulations in force in your country. Check the combustion each time the flues are swept. See chapter:

¼ "Setting the air/gas ratio (Full load)", page 41 ¼ "Setting the air/gas ratio (Part load)", page 43

4 Carry out the inspection and standard maintenance operations

once a year.

4 Carry out specific maintenance operations if necessary.

7.2 Standard inspection and maintenance operations

CAUTION

4 During inspection and maintenance operations,

always replace all gaskets on the parts removed.

4 Use only original spare parts that are intended for use

with this type of boiler.

7.2.1. Open the boiler

WARNING

Ensure that the boiler is switched off.

1. Unscrew the 2 screws, located on the front panel.

R000346-A

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2. Remove the front panel.

7.2.2.

Checking the hydraulic pressure

The hydraulic pressure must reach a minimum of 0,8 bar. If necessary, top up the water level in the heating system (recommended hydraulic pressure between

1,5 and 2 bar).

CAUTION

4 Before filling, open the valves on every radiator in the

installation.

4 Ensure that the boiler is switched off.

1. Open the cock from the filling loop (During filling, air can escape from the system via the automatic air vent).

Turn off the tap on the filling loop if the pressure gauge indicates a pressure between 1,5 and 2 bar.

3. Check the tightness of the water connections.

4. Turn the boiler on.

7.2.3. Checking the expansion vessel

Check the expansion vessel and replace it if necessary.

7.2.4.

Checking the ionization current

Check the ionization current at full load and low load. The value is stable

after 1 minute. If the value lies below 3 µA, replace the ignition

electrode.

¼See chapter: "Replacing the ionization/ignition electrode", page

55.

Use a service tool to read the value.

7.2.5. Checking the transfer capacity

If tap capacity falls significantly (due to insufficient temperature and/ or

flow rate), clean the plate heat exchanger (hot water side) and the

tap water cartridge:

¼See chapter: "Cleaning the plate exchanger", page 56.

R000405-A

R000457-A

0 120

100

°C

bar

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7.2.6. Checking

the flue gas discharge and the air

supply

Check the tightness of the flue gases evacuation and air inlet connections.

7.2.7.

Checking combustion

Measure the O2/

CO2 contents and the temperature of the flue gases

at the flue gas measuring point. To do this, proceed as follows:

4 Heat the water in the boiler to a temperature of approx. 70 °C.

4 Unscrew the plug of the flue gas measurement point.

4 Measure the smoke content in O2/ CO2 using the measuring

equipment. Compare this with the control value. ¼See following chapters:

"Setting the air/gas ratio (Full load)", page 41 "Setting the air/gas ratio (Part load)", page 43

7.2.8. Checking the automatic air vent

1. Check that the automatic bleed is working (This is visible on the right on top of the boiler).

2. The

air vent can be closed off with the cap that can be found next

to it.

3. If any leaks are detected, replace the air vent.

R000406-A

T003127-B

R000350-A

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7.2.9. Checking the siphon

CAUTION

First remove the front housing of the boiler so that you can disconnect the syphon.

1. Move the lever underneath the hydroblock to the right to disconnect the syphon.

Remove the siphon and clean it.

3. Replace the seal ring for the syphon.

4. Fill the syphon with water up to the mark.

Press the syphon firmly into the j opening provided for it underneath the boiler. The syphon must click into place.

6. Check whether the syphon is solidly fitted in the boiler.

R000447-B

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7.2.10. Checking the burner and cleaning the heat

exchanger

CAUTION

During inspection and maintenance operations, always replace all gaskets on the parts removed.

1. Close

the gas valve of the boiler. Ensure that the boiler is switched

off. Remove the front panel.

2. Take the bracket off the flue gas discharge pipe. Remove the flue gas discharge pipe.

3. Remove the air inlet flue on the venturi.

4. Unscrew the gland underneath the gas block.

5. Open the protective cover for the fan on the top and remove all the plugs from the PCB.

6. Close the fan’s protective cover.

7. Disassemble the ignition electrode. Check the ignition electrode for wear. Replace if necessary.

See also: "Replacing the ionization/ignition electrode", page

8. Unclip the 2 locking clips that attach the gas/air unit to the heat exchanger.

9. Remove the gas/air unit by moving the gas/air unit upwards and then forwards.

10.Tilt the burner and remove it, along with the heat exchanger gasket.

11.Use a vacuum cleaner fitted with a special endpiece (accessory) to clean the top part of the heat exchanger (combustion chamber).

12.Thoroughly clean with the vacuum cleaner again without the top cleaning brush on the endpiece.

13.Check (using a mirror, for example) whether any dust can still be seen. If so, hoover it up.

14.The burner does not require any maintenance, it is self-cleaning. Check that there are no cracks and/or other tears on the surface of the dismantled burner. If this is not the case, replace the burner.

15.Install the ignition electrode.

16.To re-assemble, perform the above actions in reverse order.

CAUTION

4 Remember to replace the plugs on the PCB for the

gas/air unit.

4 Check

that the gasket is correctly positioned between the mixing elbow and the heat exchanger. (Completely flat in the appropriate groove means it is leak proof).

17.Open the gas inlet valves and switch on the mains supply to the boiler.

T004777-B

12 13

14 15

16 17

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7.3 Specific maintenance operations

WARNING

Ensure that the boiler is switched off.

CAUTION

4 During inspection and maintenance operations,

always replace all gaskets on the parts removed.

4 Use

only original spare parts that are intended for use

with this type of boiler.

If the standard inspection and maintenance operations have revealed the necessity to carry out additional maintenance work, proceed as follows, depending on the nature of the work:

7.3.1. Replacing the ionization/ignition electrode

Replace the ionization/ignition electrode in the following cases:

4 Ionization current <3 µA.

4 Electrode worn.

Open the protective cover for the fan at the top.

2. Remove the ignition electrode plugs from the PCB.

3. Unscrew the 2 screws on the ignition electrode. Remove the unit.

4. Fit the new ionisation/ignition electrode.

5. To re-assemble, perform the above actions in reverse order.

R000433-A

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7.3.2. Replacing the 3-way valve

If it becomes necessary to replace the 3-way valve, proceed as follows:

Close the main water valve.

2. Drain the boiler.

3. Open the protective cover for the fan at the top.

4. Disconnect the three-way valve cable from the automatic control unit.

5. Unclip the locking clip that holds the 3-way valve.

6. Dismantle the 3-way valve by rotating a screwdriver.

7. Remove the 3-way valve.

8. To re-assemble, perform the above actions in reverse order.

CAUTION

Be careful of the positioning cams on the 3-way valve.

7.3.3. Cleaning the plate exchanger

Depending on the water quality and the operating mode, limescale deposits may form in the plate exchanger.

As a general rule, a periodic inspection, along with cleaning, if necessary, is sufficient. The following factors may affect the periodicity:

4 Water hardness.

4 Composition of the limescale.

4 Number of hours’ operation of the boiler.

4 Draw-off rate.

4 Domestic hot water set point temperature.

R000400-A

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If descaling of the plate exchanger is necessary, proceed as follows:

Ensure that the boiler is switched off.

2. Close the gas valve of the boiler.

3. Close the main water valve. Drain the boiler.

4. Unscrew the screw on the left-hand side of the heat exchanger.

5. Remove the plate heat exchanger by moving the left-hand side

forwards and tipping the right-hand side out of the bracket.

6. Clean the plate heat exchanger with a descaling product (citric

acid pH 3). To do this, a specific cleaning appliance is available as an accessory. After cleaning, rinse thoroughly under running water.

7.3.4. Cleaning the domestic water cartridge

The plate heat exchanger should be removed in order to clean the tap water cartridge. Then proceed as follows:

1. Dismantle

the domestic water cartridge by rotating a screwdriver.

2. Remove the domestic water cartridge.

3. Clean or replace the domestic water cartridge if required.

4. Re-assemble all of the components.

7.3.5. Replacement of the expansion vessel

The following procedures have to be carried out before the expansion vessel can be replaced:

4 Close the gas valve of the boiler.

4 Close the main water valve.

4 Close the flow central heating pipe and the return central heating

pipe.

4 Tap the boiler.

The expansion vessel is inside the boiler at the rear.

To replace the

expansion vessel, the front of the boiler should be removed first.

R000403-A

R000401-A

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Removing the front of the boiler

Disconnect the flue gas discharge and air flow pipes from the boiler.

2. Remove the connection box.

3. Disconnect all incoming and outgoing pipes from the underside of

the boiler.

4. Disconnect the gas supply pipe GAS / GAZ from the boiler.

5. Remove the syphon and condensate drain hose.

To check how to remove the syphon, see:

"Checking the

siphon", page 53.

6. Disconnect the expansion vessel hose from the underside of the

boiler.

7. Press down the mounting clip on top of the boiler and remove the

front of the boiler.

Remove the expansion vessel

1. Bring the tab above the expansion vessel forwards and hold onto

it while disconnecting the expansion vessel.

2. Move the expansion vessel slightly upwards and lift the vessel

from the mounting bracket.

3. Tip the expansion vessel forwards and allow it drop slightly.

4. Carefully lift the expansion vessel out of the boiler.

5. Replace the defective expansion vessel.

6. To re-assemble, perform the above actions in reverse order.

CAUTION

4 Replace all removed gaskets.

4 Fill the system with clean tap water (advised water

pressure is between

1,5 and 2 bar).

"Water

treatment", page 33

7.3.6. Re-assembling the boiler

1. Follow the procedure in reverse to re-assemble all of the

components.

CAUTION

During inspection and maintenance operations, always replace all gaskets on the parts removed

2. Fill the syphon with water up to the mark.

Put the siphon back in place.

4. Carefully open the main water valve, fill the installation, vent it and,

if need be, top it up with water. The hydraulic pressure must be a minimum of 0,8 bars. Check for any water leaks.

5. Check the seals on the gas and water connections.

6. Switch the boiler back on.

05059-A

R000351-A

T002415-B

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Page 61

7. Check the setting of the gas/air ratio and, if necessary, correct it.

See chapter: "Setting the air/gas ratio (Full load

)", page 41

See chapter: "Setting the air/gas ratio (Part load)", page

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8 Troubleshooting

8.1 Error codes

Sanitary hot water temperature rotary knob

Heating water temperature rotary knob

Sweep key B and Status signals

RESET-button and on/off signal

The status signal for the B

button can flash in a range of colours and at different frequencies. The meaning of these signals can be found in the User instruction card supplied with the boiler.

¼See also: "User instruction card", page 76.

CAUTION

The instruction card must be slid underneath the connection box after the boiler installation or use of the card.

8.2 Shutdowns and lock-outs

8.2.1. Blocking

A (temporary) blocking mode is a boiler operating function caused by an unusual situation.

The boiler control will try to re-start several times. The boiler will start up again after the blocking conditions have been eliminated.

In the event of a shutdown, the status signal for the B button flashes green. The meaning of the shutdown codes can be found in the shutdown table.

Status signals Description Code

Shutdown code 1 (1 times green signal)

Temperature protection

5v[1 / 5v[2 / 5v[7

Shutdown code 2 (2 times green signal

)

Shutdown input

5v[10 / 5v[11

Shutdown code 3 (3 times green signal

)

Flame loss

5v[22

Shutdown code 4 (4 times green signal

)

Communication fault

5v[12 / 5v[13 / 5v[21

Shutdown code 5 (5 times green signal

)

Parameter or identification fault

5v[0 / 5v[16 / 5v[17 / 5v[18 / 5v[19

Shutdown code 6 (6 times green signal

)

Miscellaneous

5v[15 / 5v[25

T002247-D

321 4

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The boiler starts up again automatically when the reason for the blocking has been removed.

The shutdown codes from the status signals are related to the shutdown codes that can be read by a service tool.

The meaning of

the shutdown codes can be found in the shutdown table:

Shutdown code

Description Probable causes Checking / solution

5v[0

Parameter error

4 Parameters faulty

4 Reset df and dV

4 Restore parameters with Recom

5v[1

Maximum flow temperature exceeded

4 Non-existent or insufficient

circulation

4 Check the circulation (direction, pump,

valves)

4 Reasons for the heat demand

5v[2

Maximum increase of the flow temperature has been exceeded

4 Non-existent or insufficient

circulation

4 Sensor error

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

4 Check that the sensors are operating

correctly

4 Check that the sensor has been correctly

fitted

4 Check the cleanliness of the heat

exchanger

5v[7

Maximum difference between

the flow and return

temperature exceeded

4 Non-existent or insufficient

circulation

4 Sensor error

4 Check the circulation (direction, pump,

valves)

4 Check the water pressure

4 Check that the sensors are operating

correctly

4 Check that the sensor has been correctly

fitted

4 Check the cleanliness of the heat

exchanger

5v[10

Shutdown input is open

4 External cause

4 Parameter error

4 Bad connection

4 Suppress the external cause

4 Check the parameters

4 Check the wiring

5v[11

Shutdown input active or frost protection active

4 External cause

4 Parameter error

4 Bad connection

4 Suppress the external cause

4 Check the parameters

4 Check the wiring

5v[12

Communication error with the HMI PCB

4 Connection box not

connected

4 Check the wiring

5v[13

Communication error with the SCU PCB

4 Bad connection with

BUS

4 SCU PCB missing from

connection box

4 Check the wiring

4 Carry out automatic detection

5v[15

Gas pressure too low

4 Non-existent or insufficient

circulation

4 Incorrect gas switch Gps

adjustment (connected to PCB SCU)

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Check whether the Gps gas pressure

control system has been correctly fitted

4 Replace the Gps gas pressure control

system if need be

5v[16

(1)

Configuration error

4 Internal fault in gas/air unit 4 Replace the gas/air unit

5v[17

(1)

Configuration fault or default parameter table incorrect

4 Parameter

fault in gas/air unit

4 Replace the gas/air unit

5v[18

(1)

Configuration error (Boiler/ PSU not recognised

)

4 Incorrect PSU for this boiler 4 Replace the PSU

(1) These lock-outs are not stored in the fault memory

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Shutdown code

Description Probable causes Checking / solution

5v[19

(1)

Configuration fault or parameters df-dV unknown

4 Reset df and dV 4 Reset df and dV

5v[20

(1)

Configuration procedure active

4 Active for a short time after

switching on the boiler

4 No action required

(Normal behaviour)

5v[21

Communication fault

4 Internal fault in gas/air unit 4 Replace the gas/air unit

5v[22

No flame during operation

4 No ionization current

4 Purge the gas supply to remove air

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Check

the operation and setting of the gas

valve unit

4 Check that the air inlet and flue gas

discharge flues are not blocked

4 Check that there is no recirculation of flue

gases

5v[25

Internal fault in gas/air unit

4 Replace the gas/air unit

(1) These lock-outs are not stored in the fault memory

8.2.2. Lock out

If the blocking conditions still exist after several start up attempts, the boiler will switch into locking mode (fault).

The boiler can only start

operating again once the causes of the lock-out have been rectified and after pressing the J key.

In the event of a fault, the status signal for the B button flashes red. The meaning of the error codes is given in the error table:

Status signals Description Code

Error code 1 (1 times red signal)

Sensor error

e[02 / e[03 / e[04 / e[05 / e[06 / e[07 / e[08 / e[09 / e[10 / e[11 / e[35

Error code 2 (2 times red signal)

Maximum temperature protection

e[12 / e[41

Error code 3 (3 times red signal)

Ignition fault

e[14 / e[16 / e[36

Error code 4 (4 times red signal)

Fan fault

e[34

Error code 5 (5 times red signal)

Parameter error

e[00 / e[01

Error code 6 (6 times red signal)

Miscellaneous Fault codes can be read using a service tool.

Press the J key for 5 seconds: The status signals will flash red quickly and the boiler will start its reset procedure. The boiler will also start an automatic venting cycle

lasting around 4 minutes. If the error code continues to display, search for the cause in the error table and apply the solution.

The shutdown codes from the status signals are related to the shutdown codes that can be read by a service tool. The meaning of the error codes is given in the error table:

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Lock out (Status signals)

Status signals Description Probable causes Checking / solution

Error code 1 (1 times red signal)

Sensor fault, temperature fault or flow fault

4 Sensor not or badly

connected

4 Bad connection

4 Non-existent or insufficient

circulation

4 Water circulation direction

reversed

4 Sensor fault

4 Check the wiring

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Vent the air in the heating system

4 Check the water pressure

4 Check the cleanliness of the heat exchanger

4 Check the circulation (direction, pump, valves)

4 Replace the sensor if necessary

Error code 2 (2 times red signal)

Maximum temperature of heat exchanger or control unit exceeded

4 Non-existent or insufficient

circulation

4 Sensor not or badly

connected

4 Bad connection

4 Sensor fault

4 No air supply or insufficient

air supply

4 No flue gas flow or

insufficient flue gas flow

4 Circulation

4 Vent the air in the heating system

4 Check the water pressure

4 Check the cleanliness of the heat exchanger

4 Check the circulation (direction, pump, valves)

4 Check the wiring

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

4 Check air supply

4 Check flue gas flow

4 Replace seals

Error code 3 (3 times red signal)

Ignition fault:

4 5 burner start-up

failures

4 False flame

signal

4 5x Flame loss

4 No ignition

4 Ignition arc, but no flame

formation

4 Presence of the flame but

insufficient ionization (<

µA)

4 Check the wiring

4 Check breakdown to earth

4 Check the condition of the burner set

4 Check the earthing

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Purge the gas supply to remove air

4 Check

the operation and setting of the gas valve

unit

4 Check that the air inlet and flue gas discharge

flues are not blocked

4 Replace the ionization/ignition electrode

Error code 4 (4 times red signal)

Fan fault

4 External draught over the

boiler

4 Defective gas/air unit

4 Check for adequate draw on the chimney

connection

4 Replace the gas/air unit

Error code 5 (5 times red signal)

Parameter error

4 Bad connection

4 Safety

parameters not found

4 Check the wiring

4 Reset dF/dU code with a service tool

Error code 6 (6 times red signal)

Miscellaneous

4 Several possible causes 4 Fault codes can be read using a service tool

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Lock out (Error code - e[KK)

Error code

Description Probable causes Checking / solution

e[00

Storage unit PSU parameter not found

4 Bad connection 4 Check the wiring

e[01

The safety parameters are incorrect

4 Bad connection

4 PSU defective

4 Check the wiring

4 Replace PSU

e[02

Flow temperature sensor short circuited

4 Sensor not or badly

connected

4 Bad connection

4 Sensor fault

4 Check the wiring

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

e[03

Flow temperature sensor open circuit

4 Sensor not or badly

connected

4 Bad connection

4 Sensor fault

4 Check the wiring

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

e[04 e[05

Flow temperature too low

Flow temperature too high

4 No circulation

4 Bad connection

4 Sensor not or badly

connected

4 Sensor fault

4 Vent the air in the heating system

4 Check the water pressure

4 Check the wiring

4 Check the circulation (direction, pump, valves)

4 Check the cleanliness of the heat exchanger

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

e[06

Return temperature sensor short circuited

4 Sensor not or badly

connected

4 Bad connection

4 Sensor fault

4 Check that the sensor has been correctly fitted

4 Check the wiring

4 Check that the sensors are operating correctly

e[07

Return temperature sensor open circuit

4 Sensor not or badly

connected

4 Bad connection

4 Sensor fault

4 Check that the sensor has been correctly fitted

4 Check the wiring

4 Check that the sensors are operating correctly

e[08 e[09

Return temperature too low

Return temperature too high

4 No circulation

4 Bad connection

4 Sensor not or badly

connected

4 Sensor fault

4 Vent the air in the heating system

4 Check the water pressure

4 Check the wiring

4 Check the circulation (direction, pump, valves)

4 Check the cleanliness of the heat exchanger

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

e[10 e[11

Difference between the flow and return temperatures too great

4 No circulation

4 Sensor not or badly

connected

4 Sensor fault

4 Vent the air in the heating system

4 Check the water pressure

4 Check the wiring

4 Check the circulation (direction, pump, valves)

4 Check the cleanliness of the heat exchanger

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

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Lock out (Error code - e[KK)

Error code

Description Probable causes Checking / solution

e[12

Temperature of heat exchanger above normal range (high-limit thermostat STB)

4 No circulation

4 Bad connection

4 Sensor not or badly

connected

4 Sensor fault

4 Vent the air in the heating system

4 Check the water pressure

4 Check the wiring

4 Check the circulation (direction, pump, valves)

4 Check the cleanliness of the heat exchanger

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

4 Replace the sensor if necessary

e[14

5 burner start-up failures

4 No ignition

4 Check cabling of ignition transformer

4 Replace the ionization/ignition electrode

4 Check breakdown to earth

4 Check the condition of the burner set

4 Check the earthing

4 Defective gas/air unit

4 Ignition arc, but no flame

formation

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Purge the gas supply to remove air

4 Check the operation and setting of the gas valve

unit

4 Check

that the air inlet and flue gas discharge flues

are not blocked

4 Check the wiring on the gas valve unit

4 Defective gas/air unit

4 Presence of the flame but

insufficient ionization (<

µA)

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Replace the ionization/ignition electrode

4 Check the earthing

4 Check

the wiring on the ionization/ignition electrode

e[16

False flame signal

4 Short-term fluctuations of

the mains

4 Ionization current present

when there should not be a flame

4 The burner remains very

hot: CO2 too high

4 Defective gas/air unit

4 Press the J key for 5 seconds

4 Replace the ionization/ignition electrode

4 Set the CO

4 Check the gas/air unit and replace it if necessary

e[17

Problem on the gas valve

4 Defective gas/air unit 4 Replace the gas/air unit

e[34

Fan fault

4 External draught over the

boiler

4 Defective gas/air unit

4 Check for adequate draw on the chimney

connection

4 Check the gas/air unit and replace it if necessary

e[35

Flow and return reversed

4 Bad connection

4 Sensor fault

4 Sensor not or badly

connected

4 Water circulation direction

reversed

4 Replace the sensor if necessary

4 Check the circulation (direction, pump, valves)

4 Check that the sensors are operating correctly

4 Check that the sensor has been correctly fitted

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Lock out (Error code - e[KK)

Error code

Description Probable causes Checking / solution

e[36

5x Flame loss

4 No ionization current

4 Purge the gas supply to remove air

4 Check that the gas valve is fully opened

4 Check the supply pressure

4 Check the operation and setting of the gas valve

unit

4 Check

that the air inlet and flue gas discharge flues

are not blocked

4 Check that there is no recirculation of flue gases

e[37

Communication fault

4 Internal fault in gas/air unit 4 Replace the gas/air unit

e[38

Communication error with the SCU PCB

4 Bad connection

4 Defective SCU PCB

4 Check the wiring

4 Replace SCU

PCB

e[39

Shutdown input in locked-out mode

4 External cause

4 Bad connection

4 Parameter incorrectly set

4 Suppress the external cause

4 Check the wiring

4 Check the parameters

e[40

HRU/URC unit test error

4 HRU/URC unit test error

4 External cause

4 Bad connection

4 Parameter incorrectly set

4 Check the HRU/WTW unit

4 Suppress the external cause

4 Check the wiring

4 Check the parameters

e[41

Maximum control unit temperature exceeded

4 No air supply or insufficient

air supply

4 No flue gas flow or

insufficient flue gas flow

4 Recirculation

4 Check air supply

4 Check flue gas flow

4 Replace seals

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9 Spare parts

9.1 General

When it is observed subsequent to inspection or maintenance work that a component in the appliance needs to be replaced, use only original spare parts or recommended spare parts and equipment.

To order a spare part, give the reference number shown on the list.

9.2 Spare parts

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9. Spare parts EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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9.2.1. Casing

T800236-A

90865-1

EV 90855-1

EV 90852-1

1001

1002

1003 1002

1003

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9.2.2. Heat exchanger

T800237-A

90865-2

EV 90855-2

EV 90852-2

2006

2013

2015

2007

2004

2008

2009

2011

2010

2001

2002

2013

2002

2013

2010

2013

2012

2005

2014

2005

2014

2013

2005

2003

9. Spare parts EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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9.2.3. Gas/air system

T800238-A

90865-3

EV 90855-3

EV 90852-3

3002

3003

3001

3004

3003

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9.2.4. Connection box

T800239-A

90865-4

EV 90855-4

EV 90852-4

4004

4005

4002

4003

4001

4006

4003

9. Spare parts EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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9.2.5. Hydraulic unit/Connecting pipes

T800240-A

90865-5

EV 90855-5

EV 90852-5

20 120

100

°C

bar 0

5012

5002

5006

5010

5004

5010

5013

5016

5007

5009

50015011

5003

5005

5017

5018

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 9. Spare parts

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9.2.6. Spare parts list

Casing EMC

Markers Code no. Description -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -- Part M 24 M 24/28 MI M 30/35 MI M 34/39 MI

1001 7600123 Front casing 1 x x x x

1002 S103362 Fastening screws for front housing 1 x x x x

1003 7600078 Sealing for front casing 1 x x x x

Heat exchanger and burner EMC

Markers Code no. Description -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -- Part M 24 M 24/28 MI M 30/35 MI M 34/39 MI

2001 S101760 Heat exchanger 28kW 1 x x

2001 S101761 Heat exchanger 40kW 1

x x

2002 S101758 Condensate tank 28kW 1 x x

2002 S101759 Condensate tank 40 kW 1

x x

2003 S101747 Pump 1

2003 S101748 Pump 1 x

x x

2004 S101731 Siphon 1 x x x x

2005 S101729 Set of pipes 1 x x x x

2006 S101734 Flue gas discharge pipe 1 x x x x

2007 S103359 Connecting piece for flue gas discharge pipe 1 x x x x

2008 S101764 Ignition/ionization electrode 1 x x x x

2009 S101771 Set of sensors (HL/NTC) 1 x x x x

2010 S101770 Automatic air vent 1 x x x x

2011 S101754 Gasket for burner 28kW 1 x x

2011 S101755 Gasket for burner 40kW 1

x x

2012 S101689 Combustion air/flue gas adapter 60/100 mm 1 x x x x

2013 S101756 Set of Gaskets 1 x x x x

2014 S101740 Set of fasteners 1 x x x x

2015 S62105 Sealing plate for the ignition electrode 10

x x

Gas/air EMC

Markers Code no. Description -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -- Part M 24 M 24/28 MI M 30/35 MI M 34/39 MI

3001 S101732 Gas/air unit, including control PCB and fan 28kW 1 x x

3001 S101733 Gas/air unit, including control PCB and fan 40kW 1

x x

3002 S101752 Burner 28kW 1 x x

3002 S101753 Burner 40kW 1

x x

3003 S101729 Set of pipes 1 x x x x

3004 S56155 Sealing ring Ø 23,8x17,7x2 mm 20 x x x x

Electronic system EMC

Markers Code no. Description -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -- Part M 24 M 24/28 MI M 30/35 MI M 34/39 MI

4001 S101732 Gas/air unit, including control PCB and fan 28kW 1 x x

4001 S101733 Gas/air unit, including control PCB and fan 40kW 1

x x

4002 7600498 Connection box 1 x x x x

4003 S103360 cable form 1 x x x x

4004 S101764 Ignition/ionization electrode 1 x x x x

4005 S101771 Set of sensors (HL/NTC) 1 x x x x

4006 S101769 Hall sensor 1

x x

9. Spare parts EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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Hydraulics EMC

Markers Code no. Description -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Part M 24 M 24/28 MI M 30/35 MI M 34/39 MI

5001 S101750 Plate heat exchanger

5001 S101751 Plate heat exchanger 1

x x

5002 S101765 Actuator with 3-way valve 1 x x x x

5003 S101766 Cartridge 1

5003 7600499 Cartridge 1

5003 7600519 Cartridge 1

5004 S103225 Hydraulic module set 24kW 1 x

5004 S101745 Hydraulic module set 28kW 1

5004 7601214 Hydraulic module set 35kW 1

5004 S101746 Hydraulic module set 39kW 1

5005 S101763 Thermo-pressure gauge 1 x x x x

5006 S101772 Overflow valve 1 x x x x

5007 S100805 Central heating inlet filter 1

x x

5009 S101756 Set of Gaskets 1 x x x x

5010 S101740 Set of fasteners 1 x x x x

5011 S59141 Screw M5x18 15

x x

5012 7600525 Expansion vessel 1 x x x x

5013 S101747 Pump 1

5013 S101748 Pump 1 x

x x

5016 S101769 Hall sensor 1

x x

5017 7600374 Mounting frame 1 x x

5017 7600371 Mounting frame 1

x x

5018 7600630 Set of pipes 1 x x x x

EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 9. Spare parts

210212 - 7601972-03

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10 Appendix

10.1 User instruction card

R000392-A

Group Signal Meaning

Boiler in service (Intermittent green signal

)

Central heating heat

Hot tap water

Maintenance message

(1)

(Flashing orange signal

)

Code A

Code B

Code C

Blockage (Flashing green signal)

Temperature protection

Shutdown input

Flame loss

Communication fault

Parameter error

Miscellaneous

Repair (Flashing red signal

)

Sensor error

Maximum temperature protection

Ignition fault

Fan fault

Parameter error

Miscellaneous

Reinitialisation

Resetting...

Chimney-sweeping position (Intermittent orange signal)

Part load

Full load Central heating heat

Full load Hot tap water

PC programming mode

_________________________________ _________________________________

(1) This function is not applicable to every type

10. Appendix EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI

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Page 80

AD001-AH

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 S.A.S

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

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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