REMEHA Gas 320 Ace User manual

United Kingdom
en
Service Manual
High-efficiency standing gas boiler
Gas 320 Ace - Gas 620 Ace
HMI T-control
SCB-01
SCB-02

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 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Additional documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 Description of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Boiler types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Introduction to the e-Smart controls platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Use of the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Control panel components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Description of the home screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Description of the main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3.1 Description of the icons in the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Installer instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.1 Accessing the user level menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Accessing the installer level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Establishing a Bluetooth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Commissioning the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4.1 Chimney sweep menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4.2 Saving the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5 Configuring the installation at installer level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5.1 Changing the control panel settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5.2 Setting the installer details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.5.3 Setting the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5.4 Setting the heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.5.5 Increasing the domestic hot water temperature temporarily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6 Maintaining the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.1 Viewing the service notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.2 Reading out measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.6.3 Viewing production and software information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6.4 Manual deaeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.7 Resetting or restoring settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7.1 Resetting the configuration numbers CN1 and CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7.2 Carrying out an auto detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.3 Restoring the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.4 Resetting to factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8 Advanced settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.8.1 Service notification settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8.2 Setting for process heat application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.8.3 Changing the ΔT setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8.4 Settings for open-vented application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8.5 Screed drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.8.6 Cascade control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5 Installation examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.1 The SCB-01 expansion PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Connecting diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.1 How to use the installation examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.2 How to find the desired installation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2.3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2.4 SCB-02 Installation example H-01-01-02-06-00-00-00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.5 SCB-02 Installation example H-01-01-01-06-00-00-00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.1 Introduction to parameter codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2 Searching the parameters, counters and signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3 List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3.1 CU-GH13 control unit parameters - Gas 320 Ace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3.2 CU-GH13 control unit parameters - Gas 620 Ace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.3.3 SCB-01 expansion PCB parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.3.4 SCB-02 expansion PCB parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.4 List of measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Contents
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6.4.1 CU-GH13 control unit counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.4.2 SCB-01 expansion PCB counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.4.3 CU-GH13 control unit signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.4.4 SCB-01 expansion PCB signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.4.5 Status and sub-status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.1 Maintenance regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
7.2 Opening the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
7.3 Standard inspection and maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.3.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.3.2 Checking the water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
7.3.3 Checking the gas filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.3.4 Checking and cleaning the air supply hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.3.5 Checking the air supply dirt trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.3.6 Checking the air box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.3.7 Checking the air pressure differential switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.3.8 Checking the gas leakage monitoring (VPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.3.9 Checking the minimum gas pressure switch (GPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.4 Specific maintenance work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
7.4.1 Cleaning the fan, non-return valve and venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.4.2 Replacing the ionisation/ignition electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.4.3 Cleaning the gas filter - 5-9 sections boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
7.4.4 Cleaning the gas filter - 10 sections boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
7.4.5 Cleaning the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7.4.6 Cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
7.4.7 Cleaning the condensate collector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
7.4.8 Cleaning the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
7.4.9 Assembly after maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.5 Finalising work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
8.1 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.1.1 Display of error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.1.2 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.1.3 Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.1.4 Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.2 Error history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
8.2.1 Reading out and clearing the error history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
9 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.1 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.2 Bluetooth® wireless technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
10 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
10.2 Exploded views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
10.3 Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Contents
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1 About this manual
1.1 Additional documentation
The following documentation is available in addition to this manual:
Installation and user manual
Product information
Water quality instructions
1.2 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.
Warning
Risk of dangerous situations that may result in minor personal injury.
Caution
Risk of material damage.
Important
Please note: important information.
The symbols mentioned below are of lower importance, but they can help you navigate or give useful information.
See
Reference to other manuals or pages in this manual.
Helpful information or extra guidance.
Direct menu navigation, confirmations will not be shown. Use if you are familiar with the system.
2 Description of the product
2.1 Boiler types
The following boiler types are available:
Tab.1 Boiler types
Name Output(1) Heat exchanger
size
Gas 320 Ace 285 279 kW 5 sections
Gas 320 Ace 355 350 kW 6 sections
Gas 320 Ace 430 425 kW 7 sections
Gas 320 Ace 500 497 kW 8 sections
Gas 320 Ace 575 574 kW 9 sections
Gas 320 Ace 650 652 kW 10 sections
Gas 620 Ace 570 558 kW 2 x 5 sections
Gas 620 Ace 710 701 kW 2 x 6 sections
Gas 620 Ace 860 849 kW 2 x 7 sections
Gas 620 Ace 1000 994 kW 2 x 8 sections
1 About this manual
7734325 - v.07 - 22092022 5

Name Output(1) Heat exchanger
size
Gas 620 Ace 1150 1147 kW 2 x 9 sections
Gas 620 Ace 1300 1303 kW 2 x 10 sections
(1) Nominal output Pnc 50/30 °C
2.2 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
1Flow connection
2Flue gas outlet
3Return connection
4Flue gas collector
Fig.1 General - front
AD-3001552-01
1
2
3
4
5
7
6
8
9
10
11
Fig.2 Gas 320 Ace - back
AD-3001553-02
1
2
3
4
6
7
8
12
10
9
11
5
Fig.3 Gas 620 Ace - back
AD-3001554-02
3
2
1
4
2 Description of the product
6 7734325 - v.07 - 22092022

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)
2.3 Introduction to the e-Smart controls platform
The Gas 320/620 Ace boiler is equipped with the e-Smart controls
platform. This is a modular system, and offers compatibility and
connectivity between all products that make use of the same platform.
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
2 Description of the product
7734325 - v.07 - 22092022 7

Fig.7 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 Gas 320/620 Ace boiler
Name visible
in display
Software ver
sion
Description Function
CU-GH13 1.3 Control unit CU-GH13 The CU-GH13 control unit handles all basic functionality of the
Gas 320/620 Ace boiler.
MK3 1.85 Control panel HMI T-control The HMI T-control is the user interface to the Gas 320/620
Ace boiler.
SCB-01 1.3 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-02 1.3 Expansion PCB SCB-02 The SCB-02 provides functionality for a DHW and central
heating zone, a 0-10 V connection for a PWM system pump
and two potential-free contacts for status notification.
GTW-
Bluetooth
- Gateway BLE Smart Antenna The BLE Smart Antenna provides functionality to connect the
boiler to an app via Bluetooth.
2 Description of the product
8 7734325 - v.07 - 22092022

3 Use of the control panel
3.1 Control panel components
1 Rotary knob to select a tile, menu or setting
2 Confirm button to confirm the selection
3 Back button :
Short button press: Return to the previous level or previous
menu
Long button press: Return to home screen
4 Menu button to go to the main menu
5 Display
6 Status LED
3.2 Description of the home screen
This screen is shown automatically after start-up of the appliance. The
control panel automatically enters standby mode (black screen) if the
buttons are not used for 5 minutes. Press one of the buttons on the control
panel to activate the screen again.
You can navigate from any menu to the home screen by pressing the back
button for several seconds.
The tiles on the home screen provide quick access to the corresponding
menus. Use the rotary knob to navigate to the desired item and press the
button to confirm the selection.
1Tiles: the selected tile is highlighted
2Date and time | Name of the screen (actual position in the menu)
3Information about the selected tile
4Icons indicating navigation level, operating mode, errors and other
information.
3.3 Description of the main menu
You can navigate from any menu directly to the main menu by pressing
the menu button . The number of accessible menus depends on the
access level (user or installer).
ADate and time | Name of the screen (actual position in the menu)
BAvailable menus
CBrief explanation of the selected menu
Tab.4 Available menus for the user
Description Icon
Enable installer access
Bluetooth
System Settings
Version Information
Fig.8 Control panel components
AD-3000932-02
4
6
3
2
1
5
Fig.9 Icons on home screen
AD-3001157-03
All OK
Error Status
i
i
All OK
Home Screen
22/02/2018 11:20
2 43
1
Fig.10 Items in the main menu
AD-3000935-02
........ ....... .......... ... ...... .........
....... ........
........ .......
...... .....11:20
.......... ......... ............
.... ..........
.................. ......
B
C
A
3 Use of the control panel
7734325 - v.07 - 22092022 9

Tab.5 Available menus for the installer
Description Icon
Disable installer access
Installation Setup
Commissioning Menu
Advanced Service Menu
Error History
Bluetooth
System Settings
Version Information
3.3.1 Description of the icons in the display
Tab.6 Icons
Icon Description
User menu: user-level parameters can be configured.
Installer menu: installer-level parameter can be configured.
Information menu: read out various current values.
System settings: system parameters can be configured.
Error indicator.
Gas boiler indicator.
Domestic hot water tank is connected.
The outdoor temperature sensor is connected.
Boiler number in cascade system.
The solar calorifier is on and its heat level is displayed.
Burner output level (1 to 5 bars, with each bar representing 20% output).
The pump is running.
Three-way valve indicator.
Display of the system water pressure.
Chimney sweep mode is enabled (forced full load or low load for O2/CO2 measurement).
Energy-saving mode is enabled.
DHW boost is enabled.
Timer program is enabled: The room temperature is controlled by a timer program.
Manual mode is enabled: The room temperature is set to a fixed setting.
Temporary overwrite of the timer program is enabled: The room temperature is changed temporarily.
The holiday program (including frost protection) is active: The room temperature is reduced during your holiday to
save energy.
Frost protection is enabled: Protect the boiler and installation from freezing in winter.
Service notification: service needed.
Installer contact details are displayed or can be filled in.
Tab.7 Icons - On/off
Icon Description Icon Description
CH operation is enabled. CH operation is disabled.
DHW operation is enabled. DHW operation is disabled.
The burner is on. The burner is off.
3 Use of the control panel
10 7734325 - v.07 - 22092022

Icon Description Icon Description
Bluetooth enabled and connected (icon is non-trans
parent).
Bluetooth enabled and disconnected (icon is trans
parent).
Heating enabled.
Cooling enabled.
Heating/cooling enabled. Heating/cooling disabled.
Tab.8 Icons - Zones
Icon Description
All zones (groups) icon.
Living room icon.
Kitchen icon.
Bedroom icon.
Study icon.
Cellar icon.
4 Installer instructions
4.1 Accessing the user level menus
The tiles on the home screen provide quick access for the user to the
corresponding menus.
1. Use the rotary knob to select the required menu.
2. Press the button to confirm the selection.
The available settings of this selected menu appear in the display.
3. Use the rotary knob to select the desired setting.
4. Press the button to confirm the selection.
All options for change will appear in the display (if a setting cannot
be changed, Cannot edit read-only datapoint will appear in the
display).
5. Use the rotary knob to change the setting.
6. Press the button to confirm the selection.
7. Use the rotary knob to select the next setting or press the button to
return to the home screen.
4.2 Accessing the installer level
Some settings are protected by installer access. Enable installer access in
order to change these settings.
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Access the installer level via the tile:
1.1. Select the tile [ ].
Fig.11 Menu selection
AD-3001387-01
Not set
Home Screen
22/02/2018 11:20
... ...
........ .......
........ .......
......
Fig.12 Confirm menu selection
AD-3001388-01
... ...
........ .......
........ .......
......
Not set
Home Screen
22/02/2018 11:20
4 Installer instructions
7734325 - v.07 - 22092022 11

1.2. Use code: 0012.
The tile [ ] shows that the installer access is On, and the
icon in the top right of the display changes into .
2. Access the installer level via the menu:
2.1. Select Enable installer access from the Main Menu.
2.2. Use code: 0012.
When the installer level is enabled or disabled, the status of
the tile [ ] changes into On or Off.
When the control panel is not used for 30 minutes, the installer access is
disabled automatically. You can manually disable installer access by:
Selecting the tile [ ].
Selecting Disable installer access from the Main Menu.
4.3 Establishing a Bluetooth connection
Proceed as follows to establish a Bluetooth connection:
> Bluetooth
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Enable Bluetooth on the appliance:
ABluetooth is enabled when the Bluetooth icon is displayed
In most cases Bluetooth is enabled in the factory settings.
1.1. Press the button.
1.2. Select Bluetooth.
1.3. Select Bluetooth.
1.4. Select On.
Bluetooth is now enabled.
2. Connect to the appliance with a mobile device:
2.1. On the mobile device, connect to CU-GH13_...........
The appliance detects the incoming pairing request and
displays the pairing code and Bluetooth status.
2.2. Use the pairing code displayed on the appliance.
2.3. Wait for the pairing process to finish before interacting with the
appliance.
4.4 Commissioning the appliance
At first start-up of the appliance, the display will show the commissioning
wizard. Depending on the appliance, some steps take a few minutes to
complete, for example appliances that need to deaerate after installation
or need to configure a boiler.
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Start up the appliance.
Fig.13 Installer level
AD-3001378-02
00:12
0 1 2
3
4
0
1
5
6
2
0
3
4
5
1
2
3
4
1
2
3
4
0
........ .......
........ .......
........ ......... ...
..... ... ....... .... .. ..... ....... .... ..... .......
i
Fig.14 Installer level
AD-3001378-02
00:12
0 1 2
3
4
0
1
5
6
2
0
3
4
5
1
2
3
4
1
2
3
4
0
........ .......
........ .......
........ ......... ...
..... ... ....... .... .. ..... ....... .... ..... .......
i
Fig.15 Bluetooth enabled
AD-3002081-01
00:12 ........ .......
........ .......
........ ......... ...
..... ... ....... .... .. ..... ....... .... ..... .......
.............. ...
...... ... .
........ ..
.... ...
...... ..
....... .... ...
..... ... ....... .... .. ..... ....... .... ..... .......
i
A
4 Installer instructions
12 7734325 - v.07 - 22092022

2. Follow the instructions on the display.
Important
The appliance might take a few minutes during certain steps while
commissioning. Do not shut off the appliance or try to bypass
steps, unless stated otherwise on the display.
3. You can access individual commissioning steps:
3.1. Press the button.
3.2. Select Commissioning Menu.
3.3. Select the commissioning step you wish to perform.
4.4.1 Chimney sweep menu
Select the tile [ ] to open the chimney sweep menu. The Change load
test mode menu will appear:
A Change load test mode
B Load test mode
Tab.9 Load tests in the chimney sweep menu
Change load test mode Settings
Off No test
Low power Part load test
Medium power Full load test for Central Heating mode
High power Full load test for Central Heating + Domestic Hot Water mode
Tab.10 Load test settings
Load Test menu Settings
Func. test status Select the load test to start the test.
System Flow Temp Read the central heating flow temperature
T return Read the central heating return temperature
Actual fan RPM Read the actual fan speed
Actual flame current Read the actual flame current
Fan RPM Max CH Adjust the maximum fan speed during Central Heating mode
Fan RPM Min Adjust the minimum fan speed during Central Heating + Domestic Hot Water mode
Fan RPM Start Adjust the start fan speed
See also
Checking/setting values for O2/CO2 at full load, page 57
Checking/setting values for O2/CO2 at low load, page 59
Performing the full load test
1. Select the tile [ ].
The Change load test mode menu appears.
Fig.16 Load test
AD-3000941-03
..... ... ....... .... .. ..... .... .........
..... ... ....... ....
..... ... ....... ....
....... .... .. ..... .... .......
....... ...........
......
.....
...
.....
..... ... ....... .... .. ..... ....... .... ..... .......
i
.....
....... .... ....... .... .......
.... ...... ....... ......11:20
A
B
4 Installer instructions
7734325 - v.07 - 22092022 13

2. Select the test Medium power.
AChange load test mode
BMedium power
The full load test starts. The selected load test mode is shown in the
menu and the icon appears in the top right of the screen.
3. Check the load test settings and adjust if necessary.
Only the parameters shown in bold can be changed.
Performing the low load test
1. If the full load test is still running, press the button to change the
load test mode.
2. If the full load test was finished, select the tile [ ] to restart the
chimney sweep menu.
AChange load test mode
B Low power
3. Select the Low power test in the menu Change load test mode.
The low load test starts. The selected load test mode is shown in
the menu and the icon appears in the top right of the screen.
4. Check the load test settings and adjust if necessary.
Only the parameters shown in bold can be changed.
5. End the low load test by pressing the button.
The message Running load test(s) stopped! is displayed.
4.4.2 Saving the commissioning settings
You can save all current settings on the control panel. These settings can
be restored if necessary, for example after replacement of the control unit.
> Advanced Service Menu > Save as commissioning settings
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Advanced Service Menu.
3. Select Save as commissioning settings.
4. Select Confirm to save the settings.
When you have saved the commissioning settings, the option Revert
commissioning settings becomes available in the Advanced Service Menu.
4.5 Configuring the installation at installer level
Configure the installation by pressing the button and selecting
Installation Setup . Select the control unit or circuit board you want to
configure:
Tab.11
Icon Zone or function Description
Internal DHW Domestic hot water produced by boiler
CIRCA / CH Central heating circuit
Auto filling CH Adjust or start the automatic filling unit
Commercial boiler Gas boiler
Fig.17 Full load test
AD-3000941-03
..... ... ....... .... .. ..... .... .........
..... ... ....... ....
..... ... ....... ....
....... .... .. ..... .... .......
....... ...........
......
.....
...
.....
..... ... ....... .... .. ..... ....... .... ..... .......
i
.....
....... .... ....... .... .......
.... ...... ....... ......11:20
A
B
Fig.18 Low load test
AD-3000941-03
..... ... ....... .... .. ..... .... .........
..... ... ....... ....
..... ... ....... ....
....... .... .. ..... .... .......
....... ...........
......
.....
...
.....
..... ... ....... .... .. ..... ....... .... ..... .......
i
.....
....... .... ....... .... .......
.... ...... ....... ......11:20
A
B
4 Installer instructions
14 7734325 - v.07 - 22092022

Icon Zone or function Description
Gas fired appliance Gas boiler
Shower time function Activate the shower time function
Tab.12 Configuring a zone or function of CU-GH08 or SCB-02
Parameters, counters, signals Description
Parameters Set the parameters at installer level
Counters Read the counters at installer level
Signals Read the signals at installer level
4.5.1 Changing the control panel settings
You can change the control panel settings within system settings.
> System Settings
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select System Settings .
3. Perform one of the operations described in the table below:
Tab.13 Control panel settings
System Settings menu Settings
Set Date and Time Set the current date and time
Select Country and Language Select your country and language
Daylight Saving Time Enable or disable daylight saving time. When enabled daylight saving time will
update the systems internal time to correspond with summer and winter time.
Installer Details Read out the name and phone number of the installer
Set Heating Activity Names Create the names for the activities of the timer program
Set Screen Brightness Adjust the brightness of the screen
Set click sound Enable or disable the click sound of the rotary knob
License Information Read out detailed license information from the device platform application
4.5.2 Setting the installer details
You can store your name and phone number in the control panel to be
read by the user. When an error occurs these contact details will be
displayed.
> System Settings > Installer Details
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
Enable installer access if it is not enabled.
1.1. Select Enable installer access.
1.2. Use code 0012.
2. Select System Settings .
3. Select Installer Details.
4. Enter the following data:
Installer name Your company's name
Installer phone Your company's phone number
4 Installer instructions
7734325 - v.07 - 22092022 15

4.5.3 Setting the parameters
You can change the settings of the control unit and the connected
expansion boards, sensors etc. to configure the installation. The factory
settings support the most common heating systems. The user or the
installer can optimise the parameters as required.
Important
Changing the factory settings may adversely affect the operation
of the installation.
> Installation Setup > select zone or device > Parameters,
counters, signals > Parameters
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Installation Setup.
3. Select the zone or device you want to configure.
4. Select Parameters, counters, signals.
5. Select Parameters.
A Parameters
Counters
Signals
B List of settings or values
The list of available parameters is displayed.
4.5.4 Setting the heating curve
When an outdoor temperature sensor is connected to the installation, the
relation between the outdoor temperature and the central heating flow
temperature is controlled by a heating curve. This curve can be adjusted
to the requirements of the installation.
Select zone > Heating Curve
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Select the tile of the zone you want to configure.
2. Select Control strategy.
3. Select the setting Outdoor Temp. based or Outdoor & room based.
The option Heating Curve appears in the Zone setup menu.
4. Select Heating Curve.
A graphic display of the heating curve is shown.
5. Adjust the following parameters:
Tab.14 Settings
A Slope: Slope of the heating curve:
Underfloor heating circuit: slope between 0.4
and 0.7
Radiator circuit: slope at approximately 1.5
B Max: Maximum temperature of the heating circuit
C Base: Ambient temperature setpoint
D xx°C ; xx
°C
Relationship between the heating circuit flow
temperature and the outdoor temperature. This
information is visible throughout the slope.
Fig.19 Parameters, counters, signals
AD-3000936-02
: .... ...... ........ ..............
11:20
..... ... ....... .... .. ..... .... .........
..... ... ....... ....
..... ... ....... ....
....... .... .. ..... .... .......
....... ...........
......
.....
...
........ ....... .....
............................ ..............
A
B
Fig.20 The heating curve
AD-3001402-01
.... ...... ........ ..............
11:20
.... ...
... ....
...... ...
... ...
........ ...................
........ ...................
.... .....
D
B
A
C
4 Installer instructions
16 7734325 - v.07 - 22092022

4.5.5 Increasing the domestic hot water temperature temporarily
You can temporary increase the hot water temperature when the time
program is active with the reduced temperature setpoint. Use this to
deviate from the time program or testing of the hot water production.
> Installation Setup > Internal DHW > Hot water boost >
Duration of temporary overwrite
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Installation Setup.
3. Select Internal DHW.
4. Select Hot water boost.
5. Select Duration of temporary overwrite.
6. Set the duration in hours and minutes.
The hot water temperature is increased to the DHW comfort
setpoint.
You can abort the temporary increase by selecting Reset.
4.6 Maintaining the installation
4.6.1 Viewing the service notification
When a service notification appears on the display, you can view the
details of the notification.
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Select the tile [ ].
The View Service Notification menu opens.
2. Select the parameter or value you want to view.
4.6.2 Reading out measured values
The appliance continually registers various measured values from the
system. You can read these values on the control panel.
> Installation Setup > select zone or device > Parameters,
counters, signals > Counters or Signals
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Installation Setup.
Enable installer access if Installation Setup is not available.
2.1. Select Enable installer access.
2.2. Use code 0012.
3. Select the zone or device you want to read out.
4. Select Parameters, counters, signals.
4 Installer instructions
7734325 - v.07 - 22092022 17

5. Select Counters or Signals to read out a counter or signal.
A Parameters
Counters
Signals
B List of settings or values
4.6.3 Viewing production and software information
You can read details about the production dates, hardware and software
versions of the appliance and all connected devices.
> Version Information
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Version Information.
3. Select the appliance, control board or any other device you want to
view.
ASelect the appliance, control board or device
BList of information
4. Select the information you want to view.
4.6.4 Manual deaeration
You can manually deaerate your appliance.
> Commissioning Menu > Deaeration program
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Commissioning Menu.
3. Select Deaeration program.
The manual de-aeration menu opens.
4. Follow the instructions on the display.
You can press and hold to abort the procedure.
4.7 Resetting or restoring settings
4.7.1 Resetting the configuration numbers CN1 and CN2
The configuration numbers must be reset when indicated by an error
message or when the control unit has been replaced. The configuration
numbers can be found on the data plate of the appliance.
Fig.21 Parameters, counters, signals
AD-3000936-02
: .... ...... ........ ..............
11:20
..... ... ....... .... .. ..... .... .........
..... ... ....... ....
..... ... ....... ....
....... .... .. ..... .... .......
....... ...........
......
.....
...
........ ....... .....
............................ ..............
A
B
Fig.22 Version information
AD-3000936-02
: .... ...... ........ ..............
11:20
..... ... ....... .... .. ..... .... .........
..... ... ....... ....
..... ... ....... ....
....... .... .. ..... .... .......
....... ...........
......
.....
...
........ ....... .....
............................ ..............
A
B
4 Installer instructions
18 7734325 - v.07 - 22092022

Important
All custom settings will be erased when the configuration numbers
are reset. Depending on the appliance, there can be factory set
parameters to enable certain accessories.
Use the saved commissioning settings to restore these settings
after the reset.
If no commissioning settings were saved, write down custom
settings before resetting. Include all relevant accessory related
parameters.
> Advanced Service Menu > Set Configuration Numbers
Use the rotary knob to navigate.
Use the button to confirm your selection.
A Select the control unit
B Extra information
C Configuration numbers
1. Press the button.
2. Select Advanced Service Menu.
3. Select Set Configuration Numbers.
4. Select the device you want to reset.
5. Select and change the CN1 setting.
6. Select and change the CN2 setting.
7. Select Confirm to confirm the changed numbers.
4.7.2 Carrying out an auto detect
The auto detect-function scans the installation for devices and other
appliances connected to the L-Bus and S-Bus. You can use this function
when a connected device or appliance has been replaced or removed
from the installation.
> Advanced Service Menu > Auto Detect
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Advanced Service Menu.
3. Select Auto Detect.
4. Select Confirm to carry out the auto-detect.
4.7.3 Restoring the commissioning settings
This option is only available when the commissioning settings were saved
on the control panel and allows you to restore these settings.
> Advanced Service Menu > Revert commissioning settings
Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Advanced Service Menu.
3. Select Revert commissioning settings.
4. Select Confirm to restore the commissioning settings.
4.7.4 Resetting to factory settings
You can reset the appliance to the default factory settings.
> Advanced Service Menu > Reset to Factory Settings
Fig.23 Configuration numbers
AD-3001385-01
.... ...... ........ ..............
11:20
........
... .
... .
............ ....... ....... ....
......... ... .............. ...... .. .....
.......
.......
A
B
C
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Use the rotary knob to navigate.
Use the button to confirm your selection.
1. Press the button.
2. Select Advanced Service Menu.
3. Select Reset to Factory Settings.
4. Select Confirm to restore the factory settings.
4.8 Advanced settings
4.8.1 Service notification settings
This appliance can notify the user when service is needed. The controls
will keep track of two counters:
The total of burner operating hours since the last service (AC002)
The total of hours on mains power supply since the last service (AC003)
When one of these counters meet the value set in parameters AP009 or
AP011, the user will be notified on the control panel.
Tab.15 Service notification parameter settings
Code Display text Advice
AP009 Service hours Set this to a value that fits the operation conditions. Typically this is 3000 hours
for a commercial boiler in a normal heating set-up.
AP010 Service notification Set this to 1 = Custom notification as to use the values set in AP009 and AP011
AP011 Service hours mains Set this to a value that fits the operation conditions. Typically this is 8750 hours
(1 year) for a commercial boiler in a normal heating set-up.
4.8.2 Setting for process heat application
Important
The service life of the boiler may be reduced if it is used for
process heat applications.
For this application, adjust the following parameters:
1. Set parameter DP140 to Process heat.
2. Set parameters DP005 and DP070 to the required value for this
installation.
3. If using a DHW sensor; set parameters DP006 and DP034 to the
required value for this installation.
4.8.3 Changing the ΔT setting
The ΔT is factory set to 25 °C. It can be increased by a Remeha service
technician. Contact Remeha for more information.
Important
When increasing the ΔT, the control unit limits the flow
temperature to a maximum of 80 °C.
4.8.4 Settings for open-vented application
For this application, adjust the following parameter:
1. Set parameter DP006 to 0,0 bar.
2. Set parameter GP021 to 20°C.
4.8.5 Screed drying
The screed drying function is used to force a constant flow temperature or
a series of successive temperature levels to accelerate screed drying on
underfloor heating.
4 Installer instructions
20 7734325 - v.07 - 22092022