DeDietrich INNOVENS PRO MCA 160 Troubleshooting guide

PROJECT
INNOVENS PRO
Ireland
en
Installation, User and Service Manual
High-efficiency wall-hung gas boiler
MCA 160
Inicontrol 2

Dear Customer,
Thank you very much for buying this appliance.
Please read through the manual carefully before using the product, and keep it in a safe place for later reference. In order to
ensure continued safe and efficient operation we recommend that the product is serviced regularly. Our service and customer
service organisation can assist with this.
We hope you enjoy years of problem-free operation with the product.

Contents
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Specific safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3.1 Additional guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4 Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Additional documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.1 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.1 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.2 Unit categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.1.3 Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.1.4 Factory test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.3 Dimensions and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Description of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.2 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.1 Gas/air regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.2 Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.3 Control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.2.4 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.5 Regulating the water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.6 Protection against shortage of water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.7 Water flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.8 Hydraulic pressure sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.9 Air pressure differential switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.2.10 Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2.11 Calorifier connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2.12 Cascade system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3 Main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4 Control panel description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4.1 What each key means . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4.2 Meaning of the symbols on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5 Standard delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6 Accessories and options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Installation regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Lifting instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 Choice of the location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3.1 Type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3.2 Location of the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.4 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
5.5 Unpacking & initial preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.1 Positioning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3 Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.3.1 Rinsing the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3.2 Connecting the heating circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Contents
7667064 - v.01 - 12072017 MCA 3

6.3.3 Connecting the expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3.4 Connecting the condensate drain pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4 Gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5 Air supply/flue gas connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.1 Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.2 Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5.3 Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5.4 Length of the air and flue gas pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
6.5.5 Specific air and flue gas applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
6.5.6 Additional guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.5.7 Connecting the flue gas outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.5.8 Connecting the air supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.6 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.6.1 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
6.6.2 Control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.6.3 Assembly of the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.6.4 Connecting the connection box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.6.5 Connection possibilities for the standard PCB (CB-01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.7 Connecting a PC/laptop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.8 Filling the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
6.8.1 Water treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
6.8.2 Filling the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.8.3 Filling the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2 Gas circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.3 Hydraulic circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
7.4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.5 Commissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.6 Gas settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.6.1 Adjusting to a different gas type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.6.2 Checking/setting combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
7.7 Final instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
8.1 Use of the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.3 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1 List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1.1 Description of the parameters - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.2 Changing the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.2.1 Configuring the installation parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.3 List of measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.3.1 Counters - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.3.2 Signals - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.3.3 Status and sub-status - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.4 Reading out measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.4.1 Reading out counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
9.4.2 Reading out signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2 Standard inspection and maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.1 Checking the water pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.2 Checking the water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
10.2.3 Checking the ionisation current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.4 Checking the flue gas discharge/air supply connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
10.2.5 Checking the combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
10.2.6 Checking the PS air pressure differential switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
10.2.7 Checking the automatic air vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
10.2.8 Checking the burner and cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
10.2.9 Clean the condensate collector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.2.10 Cleaning the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Contents
4 MCA 7667064 - v.01 - 12072017

10.3 Specific maintenance work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.3.1 Replacing the ionisation/ignition electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10.3.2 Checking the non-return valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
10.3.3 Reassembling the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
11.1 Removal/recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
12.1 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
12.1.1 Warning - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
12.1.2 Blocking - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
12.1.3 Lock-out - FSB-WHB-HE-150-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
12.2 Error memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
13 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
13.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
13.2 Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
14 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
14.1 ErP information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
14.1.1 Product fiche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
14.2 EC declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
14.3 Checklist for commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
14.4 Checklist for annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Contents
7667064 - v.01 - 12072017 MCA 5

1 Safety
1.1 General safety instructions
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 imme
diately.
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 imme
diately.
Caution
After maintenance or repair work, check the en
tire heating installation to ensure that there are no
leaks.
For the end user:
1 Safety
6 MCA 7667064 - v.01 - 12072017

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. Depend
ing on the boiler settings, the temperature of the
radiators can rise to over 60°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.
Caution
Ensure that the boiler is regularly serviced. Con
tact 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 Safety
7667064 - v.01 - 12072017 MCA 7

1.2 Recommendations
Danger
This appliance can be used by children aged
eight and above and people with a physical, sen
sory or mental disability, or with a lack of experi
ence and knowledge, provided they are super
vised 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 mainte
nance should not be carried out by children with
out 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 ac
cordance 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 car
ried 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 pre
vent hazardous situations from arising.
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 mainte
nance and servicing work.
Danger
For safety reasons, we recommend fitting smoke
and CO alarms at suitable places in your home.
1 Safety
8 MCA 7667064 - v.01 - 12072017

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 regular
ly. If the water pressure is lower than 0.8 bar,
the system must be topped up (recommended
water pressure between 1.5 and 2 bar).
Important
Keep this document near to the boiler.
Important
Only remove the casing for maintenance and re
pair operations. Refit all panels when mainte
nance work and servicing are complete.
Important
Instruction and warning labels must never be re
moved 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 ap
proval of De Dietrich.
1.3 Specific safety instructions
1.3.1 Additional guidelines
In addition to the legal requirements and guidelines, the
supplementary guidelines in this manual must also be
followed. Supplements or subsequent regulations and
guidelines that are valid at the time of installation shall
apply to all regulations and guidelines specified in this
manual.
1 Safety
7667064 - v.01 - 12072017 MCA 9

1.4 Liabilities
1.4.1 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 the
appliance.
Failure to abide by the instructions on using the appli
ance.
Faulty or insufficient maintenance of the appliance.
1.4.2 Installer's liability
The installer is responsible for the installation and initial
commissioning of the appliance. The installer must ob
serve the following instructions:
Read and follow the instructions given in the manuals
provided with the appliance.
Install the appliance in compliance with prevailing leg
islation and standards.
Carry out initial commissioning and any checks neces
sary.
Explain the installation to the user.
If maintenance is necessary, warn the user of the obli
gation to check the appliance and keep it in good
working order.
Give all the instruction manuals to the user.
1.4.3 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 car
ried out by a qualified installer.
Keep the instruction manuals in good condition close
to the appliance.
1 Safety
10 MCA 7667064 - v.01 - 12072017

2 About this manual
2.1 General
This manual describes the installation, use and maintenance of the MCA
boiler. This manual is part of all the documentation supplied with the boil
er.
2.2 Additional documentation
The following documentation is available in addition to this manual:
Installation and user manual for control panel
Water quality instructions
2.3 Symbols used
2.3.1 Symbols used in the manual
This manual uses various danger levels to draw attention to special in
structions. We do this to improve user safety, to prevent problems and to
guarantee correct operation of the appliance.
Danger
Risk of dangerous situations that may result in serious personal
injury.
Danger of electric shock
Risk of electric shock.
Warning
Risk of dangerous situations that may result in minor personal in
jury.
Caution
Risk of material damage.
Important
Please note: important information.
See
Reference to other manuals or pages in this manual.
2 About this manual
7667064 - v.01 - 12072017 MCA 11

3 Technical specifications
3.1 Homologations
3.1.1 Certifications
Tab.1 Certifications
CE identification number PIN 0063CQ3781
NOx class 6 (EN 15502-1)
Type of connection B23P, B33
C13, C33, C43, C53, C63, C83, C93
3.1.2 Unit categories
Tab.2 Unit categories
Country Category Gas type Connection pressure (mbar)
Ireland II2H3B/P G20 (H gas)
G30/G31 (butane/propane)
20
30
3.1.3 Directives
In addition to the legal requirements and guidelines, the supplementary
guidelines in this manual must also be followed.
Supplements or subsequent regulations and guidelines that are valid at
the time of installation shall apply to all regulations and guidelines speci
fied in this manual.
3.1.4 Factory test
Before leaving the factory, each boiler is optimally set and tested for:
Electrical safety.
Adjustment of (O2).
Water tightness.
Gas tightness.
Parameter setting.
3.2 Technical data
Tab.3 General
MCA 160
Nominal output (Pn) for central heating operation (80°C/60°C) min. - max.
(1)
kW 31.5 - 152.1
152.1
Nominal output (Pn) for central heating operation (50°C/30°C) min. - max.
(1)
kW 34.7 - 161.6
161.6
Nominal input (Qn) for central heating operation (Hi) G20 (H gas) min. - max.
(1)
kW 32.0 - 156.0
156.0
Nominal input (Qn) for central heating operation (Hi) G31 (Propane) min. - max. kW 40.0 - 156.0
Nominal input (Qn) for central heating operation (Hs) G20 (H gas) min. - max.
(1)
kW 35.6 - 173.3
173.3
3 Technical specifications
12 MCA 7667064 - v.01 - 12072017

MCA 160
Nominal input (Qn) for central heating operation (Hs) G31 (Propane) min. - max. kW 43.4 - 169.6
Full load central heating efficiency (Hi) (80/60°C) (92/42/EEC) % 97.5
Full load central heating efficiency (Hi) (50°C/30°C) (EN15502) % 103.6
Low load central heating efficiency (Hi) (return temperature 60°C) % 98.4
Part load central heating efficiency (92/42/EEC) (return temperature
30°C)
% 108.5
(1) Factory setting.
Tab.4 Gas and flue gas data
MCA 160
Gas inlet pressure G20 (H gas) min. - max. mbar 17 - 25
Gas inlet pressure G31 (propane) min. - max. mbar 37 - 50
Gas consumption G20 (H gas)(1) min. - max. m3/h 3.4 - 16.5
Gas consumption G31 (propane)(1) min. - max. m3/h 1.4 - 6.3
NOX annual emissions G20 (H-gas) (EN 15502: O2 = 0%) mg/kWh 39
Flue gas mass flow rate min. - max. kg/h
g/s
57 - 277
16 - 77
Flue gas temperature min. - max. °C 32 - 66
Maximum counter pressure Pa 200
(1) Gas consumption based on lower heating value under standard conditions: T=288.15 K, p=1013.25 mbar. Gag 30.33; G25 29.25; G31
88.00 MJ/m3
Tab.5 Central heating circuit data
MCA 160
Water content l 17
Water operating pressure min bar 0.8
Water operating pressure (PMS) max bar 4.0
Water temperature max °C 110
Operating temperature max °C 90
Pressure drop secondary circuit (ΔT=20 K) mbar 170
Tab.6 Electrical data
MCA 160
Supply voltage VAC 230
Power consumption – full load max W 275
Power consumption – low load min W 47
Power consumption – standby min W 5.3
Electrical protection index IP IPX1B
Fuses Main A
A
6.3
1.6
3 Technical specifications
7667064 - v.01 - 12072017 MCA 13

Tab.7 Other data
MCA 160
Total weight (empty) kg 147
Minimum mounting weight (without front panel) kg 123
Average acoustic level at a distance of one metre from the boiler dB(A) 59.5
Tab.8 Technical parameters
MCA 160
Condensing boiler Yes
Low-temperature boiler(1) No
B1 boiler No
Cogeneration space heater No
Combination heater No
Rated heat output Prated kW 152
Useful heat output at nominal heat output and high temperature opera
tion(2)
P4 kW 152.1
Useful heat output at 30% of rated heat output and low temperature re
gime(1)
P1 kW 50.8
Seasonal space heating energy efficiency ƞs % -
Useful efficiency at rated heat output and high temperature regime(2)
ƞ4 % 87.8
Useful efficiency at 30% of rated heat output and low temperature re
gime(1)
ƞ1 % 97.8
Auxiliary electricity consumption
Full load elmax kW 0.275
Part load elmin kW 0.047
Standby mode PSB kW 0.005
Other items
Standby heat loss Pstby kW 0.191
Ignition burner power consumption Pign kW -
Annual energy consumption QHE kWh
GJ
-
Sound power level, indoors LWA dB 68
Emissions of nitrogen oxides NOXmg/kWh 35
(1) Low temperature means 30°C for condensing boilers, 37°C for low temperature boilers and 50°C (at heater inlet) for other heating appli
ances.
(2) High temperature operation means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet.
See
Refer to the back cover for contact details.
3 Technical specifications
14 MCA 7667064 - v.01 - 12072017

3.3 Dimensions and connections
Fig.1 Dimensions
AD-0000100-01
110
240
300
42580
226
602 600
305 143
1045
Flue gas discharge connection; Ø 150 mm
Air supply connection; Ø 150 mm
Siphon connection
CH flow connection; 1¼ inch male thread
CH return connection; 1¼ inch male thread
Gas connection; 1 inch male thread
3 Technical specifications
7667064 - v.01 - 12072017 MCA 15

3.4 Electrical diagram
Fig.2 Electrical diagram
AD-0000669-06
X1
1 32
X2
1 32
Pump
NL
X3
1 32 4 5 6 7 8 9 10 11 12
On/off
OT
PWM
0 +
0 - 10
0 + Tout BL RL
X4
1 7-
6.3 AT
F1
X019 X039 X036
X5
1 7-
X6
1 15-
CB-01
X018
X017
X035
X033
X020
230VAC
X038
Bus
X037
Bus
CU-GH06
X12
1 5-
X122X121
X11
1 - 4
X10
1 - 4
X09
1 - 4
X08
1 13-
X083
X07
1 4-
X071
X06
1 4-
X04 / X05
1 15-
X041 X051 X053 X054 X055 X081
X02
1 9-
X03
1 15-
X021X022
X032
X031
X016
X015
X01
1 7-
X0141
X014
230V, 50Hz
X011
X013X012
X20 X202
X201
EMC
X01
X02
X03
X04 / X05
X06
X07
X12
X11
X10
X09
X08
Pump
NL
OT
On/off
0+
0 - 10
0+
PWM
BL RL
Tout
X1
X8
X10
X4X9
X5 X6
X2
X3
20
19
18
17
16
151413121110
9
87
6
5
3 4
2
1
2121
1Control unit
2Lighting
3Ignition pin
4Ignition transformer
5On/off switch
6Power supply
7Service connector / computer connection
8Control panel
9Fan supply
10 Storage parameter
11 Flow sensor
12 Heat exchanger sensor
13 Return sensor
14 Hydraulic pressure sensor
15 Air pressure differential switch
16 Flue gas sensor
17 Fan control
18 Gas valve 1
19 Gas valve 2
20 Standard PCB
21 L-bus connections for additional PCBs
3 Technical specifications
16 MCA 7667064 - v.01 - 12072017

4 Description of the product
The MCA 160 boiler is delivered with a combination of the control panel
and control PCB. The combination is based on the following software and
navigation information:
Boiler MCA 160
Important
Content of this manual is based on software version 0.17
Name / navigate to:
Control panel Inicontrol 2
Important
Content of this manual is based on software version 2.0
Name / navigate to:
Control PCB SCB-01
Important
Content of this manual is based on software version 0.2
Name / navigate to:
4.1 General description
The MCA boiler is a high-efficiency wall-hung gas boiler with the following
properties:
High-efficiency heating.
Limited emissions of polluting substances.
Ideal choice for cascade configurations.
4.2 Operating principle
4.2.1 Gas/air regulation
The boiler is equipped with a casing that also serves as an air box. The
fan draws in the combustion air. The gas is injected into the venturi and
mixed with the combustion air. The fan speed is controlled on the basis of
the settings, the heat demand and the prevailing temperatures measured
by the temperature sensors. The gas/air ratio control ensures an accurate
mixture of the required amounts of gas and air. This provides optimum
combustion over the entire heat input range. The gas/air mixture goes to
the burner, where it is ignited by the ignition electrode.
Important
The combustion air supply is checked before each burner start,
and at least once every 24 hours. During continuous operation
(e.g. supplying process water), please note that the boiler control
will reset every 24 hours.
4.2.2 Combustion
The burner heats the central heating water flowing through the heat ex
changer. If the temperature of the flue gases is lower than the dew point
(approx. 55°C), the water vapour condenses in the heat exchanger. The
heat released during this condensation process (referred to as the latent
or condensation heat) is also transferred to the central heating water. The
cooled flue gases are discharged through the flue gas discharge pipe. The
condensed water is discharged through a siphon.
4.2.3 Control system
The electronic control system ensures that your heating system is smart
and reliable. This means that the boiler responds practically to negative
4 Description of the product
7667064 - v.01 - 12072017 MCA 17

environmental influences (such as limited water flow and air flow prob
lems). In the event of such influences, the boiler will not go into lockout
mode, but in the first instance will modulate back. Depending on the na
ture of the circumstances, a warning, control stop or lock-out may occur.
The boiler continues to supply heat provided the situation is not danger
ous. With this control system, your boiler is also equipped for remote con
trol and monitoring.
4.2.4 Control
On/off control
The heat input varies between the minimum and the maximum values
on the basis of the flow temperature set on the boiler. It is possible to
connect a 2-wire on/off thermostat or a power stealing thermostat to the
boiler.
Modulating control
The heat input varies between the minimum and the maximum values
on the basis of the flow temperature determined by the modulating con
troller. The boiler output can be modulated with an appropriate modulat
ing controller.
Analogue control (0 - 10 V)
The heat input varies between the minimum and the maximum values
on the basis of the voltage present at the analogue input.
4.2.5 Regulating the water temperature
The boiler is fitted with an electronic temperature control with a flow and
return temperature sensor. The flow temperature can be adjusted between
20°C and 90°C. The boiler modulates back when the set flow temperature
is reached. The switch-off temperature is the set flow temperature + 5°C.
4.2.6 Protection against shortage of water
The boiler is fitted with low water level protection based on temperature
measurements. By modulating back when the water flow threatens to be
come insufficient, the boiler remains operational as long as possible. The
boiler issues a warning in the event of no or too little water. With an insuffi
cient flow ΔT ≥ 25 K or too great an increase in the heat exchanger tem
perature sensor, the boiler goes into blocking mode.
4.2.7 Water flow
The modulating control of the boiler limits the maximum difference be
tween the flow temperature and return temperature. In addition, a heat ex
changer temperature sensor is mounted to monitor the minimum water
flow. This limits the maximum increase in the heat exchanger temperature
and monitors the maximum temperature difference between the flow, re
turn and heat exchanger temperatures. As a result, the boiler is not affec
ted by low water flow.
4.2.8 Hydraulic pressure sensor
The hydraulic pressure sensor records the water pressure in the boiler.
Change the threshold value for the hydraulic pressure sensor using pa
rameter .
For more information, see
Description of the parameters - FSB-WHB-HE-150-300, page 49
Changing the parameters, page 51
4.2.9 Air pressure differential switch
The air pressure differential switch is a protection against a blocked trap or
blocked air supply/flue gas outlet.
4 Description of the product
18 MCA 7667064 - v.01 - 12072017

Before start-up and when the boiler is in operation, the air pressure differ
ential switch APS measures the difference in pressure between the meas
uring points on the condensate collector p+ and the air box p-. If the pres
sure difference is greater than 6 mbar, then the boiler will lock out. After
eliminating the cause of the breakdown, the boiler can be unlocked.
4.2.10 Circulating pump
ΔP Boiler resistance (mbar)
QFlow rate (m3/h)
The boiler is supplied without a pump. Take the boiler resistance and sys
tem resistance into account when selecting a pump.
See
Technical data, page 12.
Caution
Maximum power consumption may be 300 VA. Use an auxiliary
relay for a pump with greater power.
4.2.11 Calorifier connection
A calorifier can be connected to the boiler. Our range includes various cal
orifiers.
Important
Contact us for more information.
4.2.12 Cascade system
The boiler is ideally suited for a cascade system. There are a number of
standard solutions available.
Important
Contact us for more information.
Fig.3 Water resistance
AD-0000857-02
170
300
250
200
150
100
50
0
0 1 2 3 4 5 6 7 8 9 10
6,5
[m3/h]
Q
T = 20 K
4 Description of the product
7667064 - v.01 - 12072017 MCA 19

4.3 Main components
1Air supply
2Casing/air box
3Interior light
4Flow sensor
5Adapter
6Heat exchanger
7Temperature sensor for heat exchanger
8Ignition transformer
9Inspection hatch for heat exchanger (x2)
10 Water pressure sensor
11 Return sensor
12 PC/laptop connection point
13 Control panel
14 On/off switch
15 Condensate collector
16 Air inlet silencer
17 Gas pressure measuring point
18 Control unit (CU-GH)
19 Gas valve unit
20 Venturi
21 Fan
22 Non-return valve
23 Air pressure differential switch
24 Automatic air vent
25 Flue gas measuring point
26 Flue gas outlet
4.4 Control panel description
4.4.1 What each key means
1
h
Escape: Back to the previous level.
Reset: Manual reset.
2 CH flow temperature Access to set temperature.
Min. key: Lowering the value.
3DHW temperature: Access to set temperature.
Plus key: Raising the value.
4 CH/DHW function: Toggles function ON/OFF
Enter key: Confirms selection or value.
5 Chimney-sweeping keys
Important
Press the 1 and 2 keys simultaneously.
6 Menu keys
Important
Press the 3 and 4 keys simultaneously.
4.4.2 Meaning of the symbols on the display
Tab.9 Possible symbols in the display (depending on available devices or functions)
Chimney sweep mode is enabled (forced full load or part load for O2 measurement).
Information menu: read out various current values.
User menu: settings for user level parameters can be changed.
Fig.4 Main components
AD-0000101-02
9
8
5
6
7
2
1
4
3
10
12
13
14
11 16
17
18
19
20
21
15
25
24
22
23
26
Fig.5 Control panel
AD-3000833-01
1 2 3 4
5 6
4 Description of the product
20 MCA 7667064 - v.01 - 12072017