DeDietrich EMC-M 24 Manual

EN
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

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.

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
3Technical 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
210212 - 7601972-03 1

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
210212 - 7601972-03 2

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
210212 - 7601972-03 4

210212 - 7601972-03 5

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
43CE: Combination of air supply and combustion gas discharge
4DHW: Domestic hot water
4PCU: Primary Control Unit - Electronic system to control burner
function
4SCU: 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
6210212 - 7601972-03

In the interest of customers, we are continuously endeavouring to
make improvements in product quality. All the specifications stated in
this document are therefore subject to change without notice.
Our liability as the manufacturer may not be invoked in the following
cases:
4Failure to abide by the instructions on using the appliance.
4Faulty or insufficient maintenance of the appliance.
4Failure to abide by the instructions on installing the appliance.
1.3.2. Installer’s liability
The installer is responsible for the installation and inital start up of the
appliance. The installer must respect the following instructions:
4Read and follow the instructions given in the manuals provided
with the appliance.
4Carry out installation in compliance with the prevailing legislation
and standards.
4Perform the initial start up and carry out any checks necessary.
4Explain the installation to the user.
4If a maintenance is necessary, warn the user of the obligation to
check the appliance and maintain it in good working order.
4Give all the instruction manuals to the user.
1.3.3. User’s liability
To guarantee optimum operation of the appliance, the user must
respect the following instructions:
4Read and follow the instructions given in the manuals provided
with the appliance.
4Call on qualified professionals to carry out installation and initial
start up.
4Get your installer to explain your installation to you.
4Have the required checks and services done.
4Keep the instruction manuals in good condition close to the
appliance.
This appliance is not intended to be used by persons (including
children) whose physcial, sensory or mental capacity is impaired or
persons with no experience or knowledge, unless they have the
benefit, through the intermediary of a person responsible for their
safety, of supervision or prior instructions regarding use of the
appliance. Care should be taken to ensure that children do not play
with the appliance.
To prevent hazardous situations from arising, if the mains lead is
damaged it must be replaced by the original manufacturer, the
manufacturer’s dealer or another suitably skilled person.
EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 1. Introduction
210212 - 7601972-03 7

1.4 Homologations
1.4.1. Certifications
CE identification no PIN 0063CM3019
NOx classification 5 (Standards EN)
Type of connection Chimney: B23, B23P, B33
Flue gas outlet: C13(x), C33(x), C43(x), C53, C63(x),
C83(x), C93(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
8210212 - 7601972-03

2 Safety instructions and
recommendations
2.1 Safety instructions
DANGER
If you smell gas:
1. Do not use a naked flame, do not smoke, do not
operate electrical contacts or switches ( doorbell,
light, motor, lift, etc..).
2. Shut off the gas supply.
3. Open the windows.
4. 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:
1. Switch the appliance off.
2. Open the windows.
3. Trace possible leaks and seal them immediately.
2.2 Recommendations
WARNING
4Installation and maintenance of the boiler must be
carried out by a qualified professional in compliance
with prevailing local and national regulations.
4When working on the boiler, always disconnect the
boiler from the mains and close the main gas inlet
valve.
4After 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 9

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
10 210212 - 7601972-03

3 Technical description
3.1 General description
Wall-hung gas condensing boilers
4High efficiency heating.
4Low pollutant emissions.
4Installation and connection facilitated by the mounting frame
delivered with the appliance.
4Flue gas discharge via a forced flue, chimney, bi-flow or 3CE type
connection.
4EMC-M 24: Heating only (Possibility of producing domestic hot
water via an independent tank which has been installed
separately).
4EMC-M 24/28 MI - 30/35 MI - 34/39 MI: Heating and domestic hot
water production.
3.2 Main parts
1Flue gas outlet/Air intake
2Casing/air box
3Outlet for measuring combustion gases
4Ignition/ionization electrode
5Flue gas discharge pipe
6Gas/air system with a fan, gas block and automatic burner
unit
7Air intake silencer
8Plate heat exchanger (DHW) (Only on models with
domestic hot water production)
9Connection box
10 Siphon
11 Shunt pump
12 3-way valve
13 Heat exchanger (Central heating)
14 Expansion vessel
15 Automatic air vent
T004783-A
3
5
6
7
9
8
13
12
14
15
11
10
1
2
4
EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 3. Technical description
210212 - 7601972-03 11

3.3 Skeleton Diagrams
EMC-M 24
1Heat exchanger (Central heating)
2Safety valve
3Heating flow (Primary circuit)
4Heating flow (Secondary circuit)
5Heating return (Secondary circuit)
6Heating return (Primary circuit)
73-way valve
8Shunt pump (Central heating)
EMC-M 24/28 MI - 30/35 MI - 34/39 MI
1Heat exchanger (Central heating)
2Hydroblock
3Plate heat exchanger (DHW)
4Safety valve
5Heating flow
6Domestic hot water outlet (DHW)
7Domestic cold water inlet
8Heating return
9Shunt pump (Central heating)
10 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
1
2
8
7
T003393-D
5 6 7 8
1
2
3
4
10
9
3. Technical description EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI
12 210212 - 7601972-03

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
HManometric height central heating circuit
QWater flow ( ΔT=20K)
EMC-M 24/28 MI
HManometric height central heating circuit
QWater flow ( ΔT=20K)
R000367-A
12001000600 800400200
0
0
100
200
300
400
500
600
Q (l/h)
16001400
700
H (mbar)
1030
24 kW
275
R000365-A
12001000600 800400200
0
0
100
200
300
400
500
600
H (mbar)
Q (l/h)
16001400
860 1030
20 kW
24 kW
253
127
EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 3. Technical description
210212 - 7601972-03 13

EMC-M 30/35 MI - 34/39 MI
HManometric height central heating circuit
QWater 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)
minimum-
maximum
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)
minimum-
maximum
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)
minimum-
maximum
kW - 5,6 - 28,2 7,8 - 34,9 7,8 - 39
Nominal input (Qnw)
DHW System (Hs)
minimum-
maximum
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 - II2ESi3P
Type of air/flue gas connection B23, B23P, B33, C13x, C33x, C43x, C53, C63x, C83x, C93x
(1) Front panel removed
R000368-A
12001000600 800400200
0
0
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
14 210212 - 7601972-03

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
EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 3. Technical description
210212 - 7601972-03 15

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
4Before mounting the boiler, decide on the ideal position for
mounting, bearing the Directives and the dimensions of the
appliance in mind.
4When choosing the position for mounting the boiler, bear in mind
the authorised position of the combustion gas discharge outlets
and the air intake opening.
4Make sure there is enough room underneath the boiler for the
connection box.
4To ensure adequate accessibility to the appliance and facilitate
maintenance, leave enough space around the boiler.
4Mount the boiler onto a flat surface.
R000292-A
R000424-A
368 5
1000 364
200
5
250
554
4. Installation EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI
16 210212 - 7601972-03

WARNING
4Fix the appliance to a solid wall capable of bearing
the weight of the appliance when full of water and fully
equipped.
4Do not place the appliance above a heat source or a
cooking appliance.
4Do not locate the boiler in direct or indirect sunlight.
4It is forbidden to store inflammable products and
materials in the boiler room or close to the boiler,
even temporarily.
CAUTION
4The boiler must be installed in a frost-free
environment.
4An earthed electrical connection must be available
close to the boiler.
4A 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:
4Accumulation of gas
4Heating of the box
Minimum cross section of the openings: S1 + S2 = 150 cm2
R000421-A
368 5
5
250
250
554
464
100 (1)
EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI 4. Installation
210212 - 7601972-03 17

4.3 Main dimensions
iConnection of the combustion gas exhaust pipe; Ø 60 mm
hConnection of the air intake pipe; Ø 100 mm
êSafety valve outlet pipe; Ø 15 mm
jCondensates discharge; Ø 25 mm
{Heating circuit flow; G¾"
yDomestic hot water outlet; G½"
Gas /
Gaz
Gas connection; G½"
xDomestic cold water inlet; G½"
zHeating circuit return; G¾"
R000354-A
368
184
364
243
541
209
230
664
151
35
52
1
2
3
4
1= 117
2= 184
3= 251
4= 316
46
90
187
76
4. Installation EMC-M 24 EMC-M 24/28 MI EMC-M 30/35 MI EMC-M 34/39 MI
18 210212 - 7601972-03