DeDietrich C 340 Series User manual

ADVANCE
S U S T A I N A B L E C O M F O R T ®
C 340
en
Installation and User Manual
High-efficiency floor-standing gas boiler
C 340 - C 640
Diematic Evolution
SCB-01
SCB-10

Contents
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.1 For the installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.2 For the end user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.3.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.3.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.3.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3 Description of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Boiler types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Dimensions and connections C 340 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Dimensions and connections C 640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5 Introduction to the controls platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.6 Accessories and options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Preparation of installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 Installation regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Location requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.3 Requirements for water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.1 Requirements for the central heating connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.2 Requirements for the condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.4 Requirements for the gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5 Requirements on the flue gas discharge system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.1 Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.2 Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.5.3 Dimensions of flue gas outlet pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.5.4 Length of the flue and air supply pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5.5 Additional guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6 Requirements for the electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.7 Water quality and water treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.8 Process heat application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.9 Connecting diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.9.1 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.9.2 Connection example - 1 direct zone + 1 mixing zone + domestic hot water zone . . . . . . . . . . . . . . . . . . . . .30
4.9.3 Connection example - primary buffer tank + 3 mixing zones + domestic hot water zone . . . . . . . . . . . . . . . 32
4.9.4 Connection example - 1 mixing zone + 1 direct zone + swimming pool + domestic hot water zone . . . . . . .34
4.9.5 Connection example - low-loss header + 3 mixing zones + domestic hot water zone . . . . . . . . . . . . . . . . . 37
4.9.6 Connection example - 2 boiler cascade + low-loss header + 3 mixing zones + domestic hot water zone . . 40
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.1 Positioning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5.2 Mounting an outdoor temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
5.2.1 Positions to be avoided . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.2.2 Recommended positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.2.3 Fitting the outdoor sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.3 Flushing the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.4 Connecting the heating circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
5.5 Connecting the condensate discharge pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.6 Connecting the gas pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.7 Connecting the air inlet and flue gas outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.8 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.8.1 PCB locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.8.2 The CB-01 connection PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.8.3 The SCB-01 expansion PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.8.4 The SCB-10 expansion PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.8.5 Connecting the power cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.8.6 Cable routing in the control box front part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Contents
2 C 340 / C 640 7762666 - v.02 - 29092020

6 Preparation of commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
6.1 Checklist before commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.1.1 Filling the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.1.2 Filling the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.1.3 Preparing the gas circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.2 Control panel description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.2.1 Control panel components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
6.2.2 Description of the home screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
6.2.3 Description of the main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.2.4 Meaning of the icons in the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.1 Commissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.2 Gas settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.2.1 Factory setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.2.2 Adjusting to a different gas type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.2.3 Checking and setting the gas/air ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.3 Final instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.3.1 Saving the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8 User instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1 Accessing the user level menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.2 Home screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
8.3 Activating holiday programs for all zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.4 Heating circuit configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.5 Changing the room temperature of a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.5.1 Definition of zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
8.5.2 Changing the name and symbol of a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.5.3 Changing the operating mode of a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8.5.4 Timer program to control the room temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8.5.5 Changing the heating activity temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.5.6 Changing the room temperature temporarily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.6 Switching the summer mode on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.7 Changing the display settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.8 Reading the installer's name and phone number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
9 Installer instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
9.1 Accessing the installer level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
9.2 Configuring the installation at installer level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
9.2.1 Setting the installer details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
9.2.2 Setting the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
9.2.3 Setting the boiler parameters when SCB-10 is fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
9.2.4 Zone functions of SCB-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
9.2.5 0-10 Volt control with expansion PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.2.6 Setting the heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
9.2.7 Status output on expansion PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
9.3 Commissioning the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
9.3.1 Chimney sweep menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
9.3.2 Saving the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.4 Maintaining the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.4.1 Viewing the service notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.4.2 Reading out measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
9.4.3 Viewing production and software information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.4.4 Changing the domestic hot water temperature temporarily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.5 Resetting or restoring settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.5.1 Resetting the configuration numbers CN1 and CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.5.2 Carrying out an auto detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.5.3 Restoring the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.5.4 Resetting to factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.6 Advanced settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
9.6.1 Setting for process heat application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
9.6.2 Changing the ΔT setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
9.6.3 Screed drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
9.6.4 Cascade control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
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10 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10.1 Introduction to parameter codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10.2 Changing the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10.3 List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10.3.1 CU-GH13 control unit settings - C 340 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10.3.2 CU-GH13 control unit settings - C 640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
10.3.3 SCB-01 expansion PCB settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
10.3.4 SCB-10 expansion PCB settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
10.4 List of measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
10.4.1 Control unit counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
10.4.2 SCB-01 expansion PCB counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
10.4.3 SCB-10 expansion PCB counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
10.4.4 Control unit signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
10.4.5 SCB-01 expansion PCB signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
10.4.6 SCB-10 expansion PCB signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
10.4.7 Status and sub-status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
11.1 Maintenance regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
11.2 Opening the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
11.3 Standard inspection and maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
11.3.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
11.3.2 Checking the water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
11.3.3 Checking the gas filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
11.3.4 Checking and cleaning the air supply hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
11.3.5 Checking the air supply dirt trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
11.3.6 Checking the air box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
11.3.7 Checking the air pressure differential switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
11.3.8 Checking the gas leakage monitoring (VPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
11.3.9 Checking the minimum gas pressure switch (GPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
11.4 Specific maintenance work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
11.4.1 Cleaning the fan, non-return valve and venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
11.4.2 Replacing the ionisation/ignition electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
11.4.3 Cleaning the gas filter - 5-9 sections boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
11.4.4 Cleaning the gas filter - 10 sections boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155
11.4.5 Cleaning the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
11.4.6 Cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
11.4.7 Cleaning the condensate collector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
11.4.8 Cleaning the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
11.4.9 Assembly after maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
11.5 Finalising work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
11.6 Disposal and recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160
12.1 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
12.1.1 Display of error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
12.1.2 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
12.1.3 Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
12.1.4 Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
12.2 Error history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
12.2.1 Reading out and clearing the error memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
13 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
13.1 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
13.1.1 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
13.1.2 Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
13.1.3 Factory test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
13.2 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
13.3 Hydraulic resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
13.4 C 340 technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
13.5 C 640 technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
14 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
14.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
14.2 Exploded views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
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14.3 Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
15 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
15.1 ErP information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
15.1.1 Product fiche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
15.2 EC declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197
16 Parameter index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
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1 Safety
1.1 General safety instructions
1.1.1 For the installer
Danger
If you smell gas:
1. Do not use naked flames, do not smoke and
do not operate electrical contacts or switches
(doorbell, lighting, motor, lift etc.).
2. Shut off the gas supply.
3. Open the windows.
4. Trace possible leaks and seal them off
immediately.
5. If the leak is upstream of the gas meter, notify
the gas company.
Danger
If you smell flue gases:
1. Switch the boiler off.
2. Open the windows.
3. Trace possible leaks and seal them off
immediately.
Caution
After maintenance or repair work, check the
entire heating installation to ensure that there are
no leaks.
1 Safety
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1.1.2 For the end user
Danger
If you smell gas:
1. Do not use naked flames, do not smoke and
do not operate electrical contacts or switches
(doorbell, lighting, motor, lift etc.).
2. Shut off the gas supply.
3. Open the windows.
4. Evacuate the property.
5. Contact a qualified installer.
Danger
If you smell flue gases:
1. Switch the boiler off.
2. Open the windows.
3. Evacuate the property.
4. Contact a qualified installer.
Warning
Do not touch the flue gas pipes. Depending on
the boiler settings, the temperature of the flue gas
pipes can rise to over 60°C.
Warning
Do not touch radiators for long periods.
Depending on the boiler settings, the temperature
of the radiators can rise to over 60°C.
Warning
Be careful when using the domestic hot water.
Depending on the boiler settings, the temperature
of domestic hot water can rise to over 65°C.
Warning
The use of the boiler and the installation by you
as the end-user must be limited to the operations
described in this manual. All other actions may
only be undertaken by a qualified fitter/engineer.
Warning
The condensate drain must not be modified or
sealed. If a condensate neutralisation system is
used, the system must be cleaned regularly in
accordance with the instructions provided by the
manufacturer.
1 Safety
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Caution
Ensure that the boiler is regularly serviced.
Contact a qualified installer or arrange a
maintenance contract for the servicing of the
boiler.
Caution
Only genuine spare parts may be used.
Important
Regularly check for the presence of water and
pressure in the heating installation.
1.2 Recommendations
Danger
This appliance can be used by children aged
eight and above and people with a physical,
sensory or mental disability, or with a lack of
experience and knowledge, provided they are
supervised and instructed in how to use the
appliance in a safe manner and understand the
associated dangers. Children must not be
allowed to play with the appliance. Cleaning and
user maintenance should not be carried out by
children without adult supervision.
Warning
Installation and maintenance of the boiler must be
carried out by a qualified installer in accordance
with local and national regulations.
Warning
The installation and maintenance of the boiler
must be undertaken by a qualified installer in
accordance with the information in the supplied
manual, doing otherwise may result in dangerous
situations and/or bodily injury.
Warning
Removal and disposal of the boiler must be
carried out by a qualified installer in accordance
with local and national regulations.
Warning
If the mains lead is damaged, it must be replaced
by the original manufacturer, the manufacturer's
dealer or another suitably skilled person to
prevent hazardous situations from arising.
1 Safety
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Warning
Always disconnect the mains supply and close
the main gas tap when working on the boiler.
Warning
Check the entire system for leaks after
maintenance and servicing work.
Danger
For safety reasons, we recommend fitting smoke
alarms at suitable places and a CO detector near
the appliance.
Caution
Make sure the boiler can be reached at all
times.
The boiler must be installed in a frost-free area.
If the power cord is permanently connected, you
must always install a main bipolar switch with
an opening gap of at least 3 mm (EN 60335-1).
Drain the boiler and central heating system if
you are not going to use your home for a long
time and there is a chance of frost.
The frost protection does not work if the boiler is
out of operation.
The boiler protection only protects the boiler,
not the system.
Check the water pressure in the system
regularly. If the water pressure is lower than 0.8
bar, the system must be topped up
(recommended water pressure between 1.5 and
2.0 bar).
Important
Keep this document near to the boiler.
Important
Only remove the casing for maintenance and
repair operations. Refit all panels when
maintenance work and servicing are complete.
Important
Instruction and warning labels must never be
removed or covered and must be clearly legible
throughout the entire service life of the boiler.
Damaged or illegible instructions and warning
stickers must be replaced immediately.
Important
Modifications to the boiler require the written
approval of De Dietrich.
1 Safety
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1.3 Liabilities
1.3.1 Manufacturer's liability
Our products are manufactured in compliance with the requirements of the
various Directives applicable. They are therefore delivered with the
marking and any documents necessary. In the interests of the quality of
our products, we strive constantly to improve them. We therefore reserve
the right to modify the specifications given in this document.
Our liability as manufacturer may not be invoked in the following cases:
Failure to abide by the instructions on installing and maintaining the
appliance.
Failure to abide by the instructions on using the appliance.
Faulty or insufficient maintenance of the appliance.
1.3.2 Installer's liability
The installer is responsible for the installation and initial commissioning of
the appliance. The installer must observe the following instructions:
Read and follow the instructions given in the manuals provided with the
appliance.
Install the appliance in compliance with prevailing legislation and
standards.
Carry out initial commissioning and any checks necessary.
Explain the installation to the user.
If maintenance is necessary, warn the user of the obligation to check the
appliance and keep it in good working order.
Give all the instruction manuals to the user.
1.3.3 User's liability
To guarantee optimum operation of the system, you must abide by the
following instructions:
Read and follow the instructions given in the manuals provided with the
appliance.
Call on a qualified professional to carry out installation and initial
commissioning.
Get your installer to explain your installation to you.
Have the required inspections and maintenance carried out by a
qualified installer.
Keep the instruction manuals in good condition close to the appliance.
1 Safety
10 C 340 / C 640 7762666 - v.02 - 29092020

2 About this manual
2.1 Symbols used in the manual
This manual contains special instructions, marked with specific symbols.
Please pay extra attention when these symbols are used.
Danger
Risk of dangerous situations that may result in serious personal
injury.
Danger of electric shock
Risk of electric shock that may result in serious personal injury.
Warning
Risk of dangerous situations that may result in minor personal
injury.
Caution
Risk of material damage.
Important
Please note: important information.
See
Reference to other manuals or pages in this manual.
2 About this manual
7762666 - v.02 - 29092020 C 340 / C 640 11

3 Description of the product
3.1 Boiler types
The following boiler types are available:
Tab.1 Boiler types
Name Output(1) Heat exchanger
size
C 340 280 279 kW 5 sections
C 340 350 350 kW 6 sections
C 340 430 425 kW 7 sections
C 340 500 497 kW 8 sections
C 340 570 574 kW 9 sections
C 340 650 652 kW 10 sections
C 640 560 558 kW 2 x 5 sections
C 640 700 701 kW 2 x 6 sections
C 640 860 849 kW 2 x 7 sections
C 640 1000 994 kW 2 x 8 sections
C 640 1140 1147 kW 2 x 9 sections
C 640 1300 1303 kW 2 x 10 sections
(1) Nominal output Pnc 50/30 °C
3.2 Main components
1Burner
2Ignition / ionisation transformer
3Heat exchanger
4Inspection hatch
5Air inlet connection
6Flame inspection glass
7Ignition / ionisation electrode
8Heat exchanger temperature sensor
9Data plate
10 Siphon
11 Document holder
1Flow connection
2Second return connection
3Return temperature sensor (when no second return is fitted)
4Flue gas outlet connection
5Return connection
6Flue gas measuring point
7Flue gas temperature sensor
8Condensate collector cap
9Air pressure differential switch
10 Heat exchanger insulation kit (optional)
11 Return temperature sensor (when a second return is fitted)
12 Levelling foot
Fig.1 General - front
AD-3001552-01
1
2
3
4
5
7
6
8
9
10
11
Fig.2 C 340 - back
AD-3001553-01
1
2
3
4
6
7
8
9
10
11
12
5
3 Description of the product
12 C 340 / C 640 7762666 - v.02 - 29092020

1Flow connection
2Flue gas outlet
3Return connection
4Flue gas collector
1Gas pressure measuring point
2Gas supply tube
3Gas - air connection piece
4Pressure measurement point
5Non-return valve
6Gas filter
7Gas valve
8Air box
9Fan
10 Venturi
11 Air supply hose
1Display cover
2Power button
3Control panel
4Service connector
5Control box rear part - for expansion PCBs with wire connections
6Control box front part - for the control unit and connectivity
expansion PCBs
1Temperature sensor (external control) immersion tube (½")
2Air vent (⅛")
3Safety valve connection (1½")
4Pressure gauge (½")
5Flow temperature sensor (M6)
Fig.3 C 640 - back
AD-3001554-01
3
2
1
4
Fig.4 Gas - air unit
AD-3001555-01
1
2
3
4
5
6
7
8
9
10
11
Fig.5 Control box
AD-3001556-01
1
2
3
4
5
6
Fig.6 Flow pipe
AD-3001557-01
1
24
3
5
3 Description of the product
7762666 - v.02 - 29092020 C 340 / C 640 13

3.3 Dimensions and connections C 340
Fig.7 Dimensions C 340
AD-3001442-02
2
1550
1293
310
155
592
366 320 337
130
707
C
L
A
353
920
447
1310
B
1477
C 340 280
350
430
500
570
650
A Base length 1833 mm 2142 mm
B Flue gas outlet centre dimension 1635 mm 1944 mm
C Total length 1862 mm 2172 mm
L Casing length 1490 mm 1800 mm
Central heating circuit flow Flange DN 80 PN10 Flange DN 80 PN10
Central heating circuit return Flange DN 80 PN10(1) Flange DN 80 PN10(1)
Gas connection G2" G2"
Condensation outlet Ø 32 mm (internal) Ø 32 mm (internal)
Flue gas outlet Ø 250 mm Ø 250 mm
Air supply Ø 250 mm Ø 250 mm
Second return (optional) Flange DN 65 PN10 Flange DN 65 PN10
(1) The inner bore of the return flange is DN65.
3 Description of the product
14 C 340 / C 640 7762666 - v.02 - 29092020

3.4 Dimensions and connections C 640
Fig.8 Dimensions C 640
AD-3001443-02
1726
1477
1310
1293
310
155
1442
130353353
721
1760
L
C
641
A
869
920
B
592 592
2
1550
366 320 337
C 640 560
700
860
1000
1140
1300
ABase length 1833 mm 2142 mm
BFlue gas outlet centre dimension 1582 mm 1892 mm
CTotal length 1862 mm 2172 mm
LCasing length 1490 mm 1800 mm
Central heating circuit flow Flange DN 80 PN10 Flange DN 80 PN10
Central heating circuit return Flange DN 80 PN10(1) Flange DN 80 PN10(1)
Gas connection G2" G2"
Condensation outlet Ø 32 mm (internal) Ø 32 mm (internal)
Flue gas outlet Ø 350 mm Ø 350 mm
Air supply
Air supply manifold (optional)
Ø 250 mm
Ø 350 mm
Ø 250 mm
Ø 350 mm
Second return (optional) Flange DN 65 PN10 Flange DN 65 PN10
(1) The inner bore of the return flange is DN65.
3.5 Introduction to the controls platform
The C 340 / C 640 boiler is equipped with the controls platform. This is a
modular system, and offers compatibility and connectivity between all
products that make use of the same platform.
3 Description of the product
7762666 - v.02 - 29092020 C 340 / C 640 15

Fig.9 Generic example
AD-3001366-02
CB
CU B
A
C
L-Bus
SCB
GTW
GTW
MK
R-Bus
S-Bus
RU
Tab.2 Components in the example
Item Description Function
CU Control Unit: Control unit The control unit handles all basic functionality of the appli
ance.
CB Connection Board: Connection PCB The connection PCB provides easy access to all connectors
of the control unit.
SCB Smart Control Board: Expansion PCB An expansion PCB provides extra functionality, like an internal
calorifier or multiple zones.
GTW Gateway: Conversion PCB A gateway can be fitted to an appliance or system, to provide
one of the following:
Extra (wireless) connectivity
Service connections
Communication with other platforms
MK Control panel: Control panel and display The control panel is the user interface to the appliance.
RU Room Unit: Room unit (for example, a thermo
stat)
A room unit measures the temperature in a reference room.
L-Bus Local Bus: Connection between devices The local bus provides communication between devices.
S-Bus System Bus: Connection between appliances The system bus provides communication between appliances.
R-Bus Room unit Bus: Connection to a room unit The room unit bus provides communication to a room unit.
A Device A device is a PCB, control panel or a room unit.
B Appliance An appliance is a set of devices connected via the same L-
Bus
C System A system is a set of appliances connected via the same S-Bus
Tab.3 Specific devices delivered with the C 340 / C 640 boiler
Name visible
in display
Software ver
sion
Description Function
CU-GH13 1.1 Control unit CU-GH13 The CU-GH13 control unit handles all basic functionality of the
C 340 / C 640 boiler.
MK3 1.29 Control panel Diematic
Evolution
The Diematic Evolution is the user interface to the C 340 / C
640 boiler.
SCB-01 1.2 Expansion PCB SCB-01 The SCB-01 provides a 0-10 V connection for a PWM system
pump and two potential-free contacts for status notification.
SCB-10 1.04 Expansion PCB SCB-10 The SCB-10 provides functionality for one DHW and three
central heating zones, a 0-10 V connection for a PWM system
pump and a potential-free contact for status notification.
GTW-22 - Gateway GTW-22 The GTW-22 provides functionality to connect the boiler to an
app via Bluetooth.
3.6 Accessories and options
Various accessories can be obtained for the boiler.
3 Description of the product
16 C 340 / C 640 7762666 - v.02 - 29092020

Important
Contact us for more information.
Tab.4 Electrical accessories and options available for the C 340 / C 640 boiler
Item Description Function Code No.
AD-3001727-01
Expansion PCB SCB-13 The SCB-13 provides functionality to connect
an external hydraulic valve.
-
AD-3001449-01
PCB AD249 The AD249 provides functionality for an extra
zone for the expansion PCB SCB-10.
100013304
AD-3001452-01
PCB GTW-08 The GTW-08 provides functionality to connect
to a building management system via Mod
bus.
7721982
AD-3001450-01
PCB GTW-30 The GTW-30 provides functionality to monitor
the boiler via GPRS.
-
AD-3001459-01
Thermostat Smart TC° The Smart TC° is a modulating room thermo
stat with advanced functionalities.
7691374
3 Description of the product
7762666 - v.02 - 29092020 C 340 / C 640 17

4 Preparation of installation
4.1 Installation regulations
Warning
The boiler must be installed by a qualified installer in accordance
with local and national regulations.
4.2 Location requirements
Danger
It is forbidden to store, even temporarily, combustible products
and substances in or near the boiler.
Caution
The boiler must be installed in a frost-free area.
An earthed electrical connection must be available close to the
boiler.
A connection to the drain must be present for the condensate
drain close to the boiler.
When choosing the best installation location, consider:
The regulations.
The required installation space.
The required space around the boiler for good access and to facilitate
maintenance.
The permitted position of the flue gas outlet and/or air supply opening.
Fig.10 Location requirements
AD-3001441-01
300
2000
B800
673
A
800 720 150
1
2
2
720
1670
800 150
B
673
800
C
300
A
1 Heat exchanger inspection hatch location
2 Support surface
A Support surface length (see table)
B Boiler length (see table)
C Total length required (see table)
Tab.5 Dimensions A / B / C (mm)
C 340 C 640 A (mm) B (mm) C (mm)
280 560 723 1862 2962
350 700 723 1862 2962
4 Preparation of installation
18 C 340 / C 640 7762666 - v.02 - 29092020

C 340 C 640 A (mm) B (mm) C (mm)
430 860 723 1862 2962
500 1000 1032 2172 3272
570 1140 1032 2172 3272
650 1300 1032 2172 3272
4.3 Requirements for water connections
Before installation, check that the connections meet the set
requirements.
Carry out any welding work required at a safe distance from the boiler.
If using synthetic pipes, follow the manufacturer's instructions.
4.3.1 Requirements for the central heating connections
We recommend installing a central heating filter in the return pipe to
prevent clogging of boiler components.
4.3.2 Requirements for the condensate drain
The drain pipe must be Ø 32 mm or larger, terminating in the drain.
Use only plastic material for the discharge pipe due to the acidity (pH 2
to 5) of the condensate.
Fit a watertrap or siphon in the drain pipe.
The drain pipe must slope down at least 30 mm per metre, the maximum
horizontal length is 5 metres.
Do not make a fixed connection in order to prevent an overpressure in
the siphon.
4.4 Requirements for the gas connection
Carry out any welding work required at a safe distance from the boiler.
Before installing, check that the gas meter has sufficient capacity. Take
into account the consumption of all appliances. Notify the local energy
company if the gas meter has insufficient capacity.
We recommend installing a gas filter to prevent clogging of the gas
valve unit.
Pipe diameters must be defined in accordance with ATG's (Association
Technique de Gaz) B171 specifications.
4 Preparation of installation
7762666 - v.02 - 29092020 C 340 / C 640 19

4.5 Requirements on the flue gas discharge system
4.5.1 Classification
Important
The installer is responsible ensuring that the right type of flue
gas outlet system is used and that the diameter and length are
correct.
Always use connection materials, roof terminal and/or outside
wall terminal supplied by the same manufacturer. Consult the
manufacturer for compatibility details.
The use of flue gas outlet systems from other manufacturers is
allowed in addition to the recommended manufacturers listed in
this manual. Use is only allowed when all our requirements are
met and the description of flue gas connection C63 is respected.
Tab.6 Type of flue gas connection: B23 - B23P
Principle Description Recommended manufactur
ers(1)
AD-3001055-01
Room-ventilated version
Without down-draught diverter.
Flue gas discharge via the roof.
Air from the installation area.
The air supply opening of the boiler must stay open.
The installation area must be vented to ensure sufficient air
supply. The vents must not be obstructed or shut off.
The IP rating of the boiler is lowered to IP20.
Connection material and roof
terminal:
Alukan
Cox Geelen
Muelink & Grol
(1) The material must also satisfy the material property requirements from the relevant chapter.
Tab.7 Type of flue gas connection: C13
Principle Description Recommended manufactur
ers(1)
AD-3001056-01
Room-sealed version
Discharge in the outside wall.
Air supply opening is in the same pressure zone as the dis
charge (e.g. a combined outside wall terminal).
Parallel wall terminal not permitted.
Outside wall terminal and con
nection material:
Cox Geelen
Muelink & Grol
(1) The material must also satisfy the material property requirements from the relevant chapter.
4 Preparation of installation
20 C 340 / C 640 7762666 - v.02 - 29092020