REMEHA GAS 120 ACE Series, GAS 120 ACE - 65, GAS 120 ACE - 90, GAS 120 ACE - 115 User Manual

MW-2000881-02

MID control box equipped with a HMI T-control

for Gas 120 ACE boiler

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.

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 3

Contents

1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1.1 Safety instructions for the installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.1.2 Safety instructions for the user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3 Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1.1 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1.2 Symbols used on the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1.1 Standards & Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1.2 Factory test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2.1 Electrical diagram for the MID control unit HMI T-control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Description of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

4.2 Main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.3 PCBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

4.3.1 SCB-02 expansion board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.3.2 Description of the CB-09 PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.3.3 Description of the IF-01 PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

4.4 Control panel description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4.1 Description of the user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4.2 Description of the main screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.5 Standard delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.6 Accessories & options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1 Installation regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2 Unpack and fit the control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.3 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3.1 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

5.3.2 Electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3.3 Recommended cable cross section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

5.3.4 Cable routing and access to the connection terminal blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

5.3.5 Connecting a modulating thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

5.3.6 Connecting an on/off thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.3.7 Frost protection combined with on/off thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3.8 Frost protection combined with outdoor temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3.9 Connecting an outdoor temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3.10 Blocking input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3.11 Release input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

5.3.12 Connecting external sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3.13 Connecting a tank sensor or thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3.14 Connecting a PWM pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.15 Connecting a standard pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

5.3.16 Connecting a domestic hot water (DHW) pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.17 Connecting a three-way valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.3.18 Connecting a system pump for mix group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.3.19 Connecting status notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.3.20 Connecting 0–10 V output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.3.21 Connection options for the expansion PCB - IF-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.3.22 Connecting a PC/laptop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6 Connecting diagrams and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.1 Factory settings for circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Contents

4 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

6.2 Connection example - SCB-02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.2 Check-list before commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.3 Checking the gas inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

7.3.1 Setting the pressure in the gas circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.4 Checking the electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.5 Checking the hydraulic circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.6 Starting and stopping the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.6.1 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.6.2 Shutting down the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.7 Gas settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.7.1 Adapting/adjusting the boiler to different types of gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

7.7.2 Checking/adjusting the combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

7.8 Displaying the water pressure on the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.9 Modifying the ΔT value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.10 Points to check after commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

8.1 Definition of zone and activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.1.1 Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

8.1.2 Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.2 Switching the summer mode on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.3 Activating the holiday program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.4 Changing the basic settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.5 Changing the name of an activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.6 Personalising the name and symbol for a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.7 Room temperature for a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.7.1 Selecting the operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.7.2 Changing the temperature settings of a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.7.3 Changing the room temperature temporarily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.7.4 Timer programming for heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.8 Domestic hot water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

8.8.1 Selecting the operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.8.2 Forcing domestic hot water production (override) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.8.3 Modifying the domestic hot water set point temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.8.4 Timer programming for domestic hot water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.1 Accessing the Installer level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.2 Setting the heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.3 Drying screed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.4 Configuring the maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.5 Saving the installer details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.6 Saving the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

9.7 Resetting or re-establishing the parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7.1 Resetting after replacing the PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7.2 Auto-detecting options and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7.3 Reverting to the commissioning settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7.4 Reverting to the factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.8 Accessing information on the hardware and software versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.9 Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.10 List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.10.1 Introduction to parameter codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.10.2 Changing the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.10.3 Control unit settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

9.10.4 List of parametersSCB-02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

9.11 Reading out measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

9.11.1 Control unit counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

9.11.2 SCB-02 counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9.11.3 Control unit signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

9.11.4 SCB-02 signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Contents

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 5

10.2 Maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.2.1 Viewing the service notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.3 Standard inspection and maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

10.3.1 Checking the combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

10.3.2 Venting the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

10.3.3 Draining the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.3.4 Check the hydraulic pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.3.5 Topping up the installation with water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.3.6 Cleaning the casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

10.4 Specific maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

10.4.1 Carrying out an auto-detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

10.4.2 Other specific maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

11.1 Displaying and clearing the error memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

11.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

11.2.1 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

11.2.2 Blockage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

11.2.3 Lock out codes CU-GH-08 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

12 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

12.1 Decommissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

12.2 Recommissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

13 Disposal and recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

14 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

14.1 Energy savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

14.2 Room thermostat and settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

15 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

15.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

15.2 Terms of warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

16 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

16.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

16.2 Spare parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

16.2.1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

17 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

17.1 Package fiche - Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

17.2 Product fiche - Temperature Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

17.3 Product fiche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

1 Safety

6 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

1 Safety

1.1 General safety instructions

Danger This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

1.1.1

Safety instructions for the installer

Danger If you smell gas:

1. Do not use a naked flame, do not smoke, do not operate electrical contacts or switches (doorbell, light, motor, lift, etc.).

2. Shut off the gas supply.

3. Open the windows.

4. Locate the probable leak and seal it immediately.

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

Danger of electric shock Before any work, switch off the mains supply to the boiler.

Danger If you smell flue gases:

1. Switch off the appliance.

2. Open the windows.

3. Locate the probable source of the flue gas leak and fix it immediately.

Warning After any maintenance or repair work, check the entire heating installation to ensure that there are no leaks.

1 Safety

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 7

Warning The condensation drain must not be changed or sealed. If a condensate neutralisation system is used, the system must be cleaned regularly in accordance with the instructions provided by the manufacturer.

Caution 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.

Caution Do not touch radiators for long periods. Depending on the boiler settings, the temperature of the radiators may exceed 60°C.

Caution Take precautions with the domestic hot water. Depending on the boiler settings, the domestic hot water temperature may exceed 65°C.

1.1.2

Safety instructions for the user

Danger If you smell gas:

1. Do not use a naked flame, do not smoke, do not operate electrical contacts or switches (doorbell, light, motor, lift, etc.).

2. Shut off the gas supply.

3. Open the windows.

4. Evacuate the property.

5. Contact a qualified professional.

Danger If you smell flue gases:

1. Switch off the appliance.

2. Open the windows.

3. Evacuate the property.

4. Contact a qualified professional.

Danger of electric shock Before any work, switch off the mains supply to the boiler.

Caution 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.

1 Safety

8 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

Caution Do not touch radiators for long periods. Depending on the boiler settings, the temperature of the radiators may exceed 60°C.

Caution Take precautions with the domestic hot water. Depending on the boiler settings, the domestic hot water temperature may exceed 65°C.

1.2

Recommendations

Danger For safety reasons, we recommend fitting smoke and CO

detectors and alarms at suitable places in your home.

Caution

The boiler must always be connected to the protective earthing. Earthing must comply with the prevailing installation standards. Earth the appliance before making any electrical connections.

For the type and calibre of the protective equipment, refer to the chapter Electrical Connections in the Installation and Service Manual.

Caution If a power cord comes with the appliance and it turns out to be damaged, it must be replaced by the manufacturer, its after sales service or persons with similar qualifications in order to obviate any danger.

Caution A disconnection device must be fitted to the permanent pipes in accordance with the installation rules.

Caution Power the appliance via a circuit that includes an omni-polar switch with contact opening distance of 3 mm or more.

Caution Drain or have the boiler and heating system drained by a qualified professional if the home is left empty for a long period of time and there is a chance of frost.

Caution Remove the boiler casing only to perform maintenance and repair work. Always put the casing back in place after such work.

Caution To enjoy warranty cover, no modifications must be made to the boiler.

Caution The frost protection function only protects the boiler, not the heating system.

Caution The frost protection function does not work if the boiler is powered off.

1 Safety

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 9

Caution The appliance should be switched to Summer or Frost Protection mode rather than be switched off in order to guarantee the following functions:

Avoidance of pumps blocking Frost Protection

Important Respect the minimum and maximum water inlet pressure to ensure correct operation of the boiler: refer to the chapter Technical Specifications.

Important Only qualified professionals are permitted to install the boiler, in accordance with prevailing local and national regulations.

Important

Never remove or cover labels and data plates affixed to the boiler. Labels and data plates must be legible throughout the entire lifetime of the boiler. Immediately replace damaged or illegible instructions and warning labels.

1.3 Liabilities

Important Keep this document close to the place where the appliance is installed.

1.3.1 Manufacturer's liability

Our products are manufactured in compliance with the requirements of the various Directives applicable. They are therefore delivered with the marking and any documents necessary. In the interests of the quality of our products, we strive constantly to improve them. We therefore reserve the right to modify the specifications given in this document.

Our liability as manufacturer may not be invoked in the following cases:

Failure to abide by the instructions on installing and maintaining the appliance. Failure to abide by the instructions on using the appliance. Faulty or insufficient maintenance of the appliance.

1.3.2 Installer's liability

The installer is responsible for the installation and initial commissioning of the appliance. The installer must observe the following instructions:

Read and follow the instructions given in the manuals provided with the appliance. Install the appliance in compliance with prevailing legislation and standards. Carry out initial commissioning and any checks necessary. Explain the installation to the user. If maintenance is necessary, warn the user of the obligation to check the appliance and keep it in good working order. Give all the instruction manuals to the user.

1.3.3 User's liability

To guarantee optimum operation of the system, you must abide by the following instructions:

Read and follow the instructions given in the manuals provided with the appliance.

1 Safety

10 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

Call on a qualified professional to carry out installation and initial commissioning. Get your installer to explain your installation to you. Have the required inspections and maintenance carried out by a qualified installer. Keep the instruction manuals in good condition close to the appliance.

2 About this manual

1 2

MW-2000068-1

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 11

2.1 Symbols used

2 About this manual

2.1.1 Symbols used in the manual

This manual uses various danger levels to draw attention to special instructions. 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 injury.

Caution Risk of material damage.

Fig.1

Important Please note: important information.

See Reference to other manuals or pages in this manual.

2.1.2 Symbols used on the appliance

1 Alternating current. 2 Protective earthing. 3 Before installing and commissioning the appliance, carefully read

the instruction manuals provided.

4 Dispose of used products through an appropriate recovery and

recycling structure.

5 Caution: danger of electric shock, live parts. Disconnect the mains

power prior to carrying out any work.

3 Technical specifications

12 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

3 Technical specifications

3.1 Homologations

3.1.1 Standards & Directives

This product complies with the requirements of the following European directives and standards:

Standards: EN15502

Efficiency Directive 92/42/EC

Low Voltage Directive 2014/35/EU Generic standard: EN 60335-1 Relevant standard: EN 60335-2-102

Electromagnetic Compatibility Directive 2014/30/EU Generic standards: EN 61000-6-3, EN 61000-6-1 Relevant Standard: EN 55014

Ecodesign Directive This product conforms to the requirements of European Directive 2009/125/EC on the ecodesign of energy-related products.

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.

Warning The appliance must be installed by a qualified professional in accordance with applicable local and national regulations.

3.1.2 Factory test

Before leaving the factory, each appliance is tested for the following:

Electrical tests (components, safety).

3.2 Electrical diagram

SCB-02

4 5

RE BK

4 5

RE BK

MW-2000917-01

10 A

L N

230V/50Hz

G/Y

4 5

RE BK

G/Y

24V

12 11

BL GR

10 9 8 7 6

OR BK RE YE BL

5 4 3 2 1

OR BK RE YE BL

230V

1 2 3 4 5

G/Y

BR BL

6 7 8 9 10

G/Y

BR BL

CB-09 IF-01

8 9

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 13

Fig.2

3 Technical specifications

3.2.1 Electrical diagram for the MID control unit HMI T-control

1 MID control panel HMI T-control 2 Service connector, allows the technician to work on

the equipment 3 230 V mains power supply connection with 10 A fuse 4 On/Off switch 5 230 V connector, connection with the boiler 6 24 V connector, connection with the boiler 7 SCB-02 PCB 8 CB-09 PCB 9 IF-01 PCB

BK Black

BL Blue

BR Brown

G/Y Green/Yellow

YE Yellow OR Orange GR Green

PI Pink GY Grey RD Red

WH White

AD-3001313-01

C No

Status A

C No

Status B

N L

0-10

Tout

N L

0-10

Tdhw Tflow

R-Bus

MW-2000918-01

4 Description of the product

14 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

4 Description of the product

4.1 General description

The control box is used to control the operation of a Gas 120 ACE boiler. The box is equipped with a HMI T-control control panel.

4.2

Main components

Fig.3

4.3 PCBs

Fig.4

SCB-02 expansion board

1 Protective cover 2 On/Off switch 3 HMI T-control control panel 4 Service connector, allows the technician to work on the equipment 5 SCB-02 PCB 6 IF-01 PCB 7 CB-09 PCB

4.3.1 SCB-02 expansion board description

The expansion board SCB-02 has the following features;

control of a (mixing) zone for heating (or cooling) control of one domestic hot water (DHW) zone 0–10 V output control for a PWM system pump two potential-free contacts for status notifications

Important

Tout - +BL RL

R-Bu

PWM

MW-2000826-01

2 3 4 5

AD-0000054-01

Status 0-10 0-10

Nc NoC

Nc No OTm 0 + 0 +C

OTm 0 + 0 +

IF-01

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 15

If the boiler is fitted with the SCB-02 board, then this is automatically recognised by the automatic control unit of the boiler. On removing this board, the boiler will show an error code. To prevent this error, carry out an auto-detect immediately after removing this board.

4.3.2 Description of the CB-09 PCB

4 Description of the product

Fig.5

Fig.6

The CB-09 PCB allows additional inputs to be connected as per the following table:

Mar ker

Con nector

Description

1 R-Bus Not used

2 BL Boiler frost protection (active if contact open)

3 RL Release open contact

4 Tout Not used

5 PWM Modulating pump control connection

6 X4 Modulating pump power connection

4.3.3 Description of the IF-01 PCB

The IF-01 PCB is factory fitted and allows additional inputs such as a sensor or switch to be connected to the system.

This PCB controls the boiler with the 0-10V signal from an external control system.

Connector Description

0-10 (input) The 0-10V signal corresponds to a temperature or power

set point, depending on the position of the jumpers

0-10 (output) Output signal indicating the boiler's operating mode

Status Boiler fault reporting contact output

OTm Communication link with the CU-GH-08 PCB

Off

MW-5000756-1

29,4°C29,6°C

51,2°C 6,7°C

21,8°C

29,4°C

1,8 bar

Not Set

None o OFF

MW-5000763-2

2 4 31

4 Description of the product

16 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

4.4 Control panel description

Caution Do not connect a frost thermostat or room thermostat to the boiler if using the 0–10 V PCB.

4.4.1 Description of the user interface

Fig.7

Fig.8

1 Rotary knob to select a menu or setting 2

Validation button

Back key to return to the previous level or previous menu

Main menu key 5 Display screen 6 LED for status indication:

continuous green = normal operation flashing green = warning continuous red = shutdown flashing red = lockout

4.4.2 Description of the main screen

This screen is displayed automatically after the appliance is started up.

The screen goes into standby if no key is pressed for five minutes. Press one of the buttons on the control panel to exit standby.

1 Symbols

The selected icon is highlighted. 2 Information on the selected icon 3 Navigation level:

: Chimney Sweep level : User level : Installer level

This level is reserved for installers and is protected by an access

Tab.1 Symbols

User Level

Installer Level Water pressure

Chimney Sweep level

Timer programme Buffer tank

Timer programme override Cascade

Holiday mode Boiler

Manual mode

Eco mode Burner on

Frost protection mode Domestic hot water override

, ,

Zone icons All zones

, ,

code. When this level is active, the

error notification: only visible if an error occurs.

icon becomes On.

Maintenance message

Outdoor temperature sensor

Burner output level

4.5 Standard delivery

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 17

4.6 Accessories & options

4 Description of the product

The package contains:

A complete control box for a Gas 120 ACE boiler Two mounting bolts with two serrated washers An outdoor temperature sensor A control box installation, user and service manual

A detailed list of accessories and options can be found in our catalogue.

MW-6000750-02

Manual

MW-6000760-01

5 Installation

18 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

5 Installation

5.1 Installation regulations

Caution The appliance must be installed and maintained by a certified professional in accordance with prevailing statutory texts and codes of practice.

5.2

Fig.9

Unpack and fit the control box

Caution Wear gloves when handling the control box.

1. Cut and remove the packaging.

Important The technical documentation is housed in the protective block.

Fig.10

2. Remove the two screws from the boiler's rear top panel.

3. Lift the top panel.

4. Remove the top panel.

MW-2000680-03

MW-6000762-01

MW-6000763-02

90º

MW-6000764-01

5 Installation

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 19

Fig.11

Fig.12

5. Remove the front door.

6. Remove the two retaining screws from the front top panel.

Fig.13

Fig.14

7. Open the control box cover.

8. Align the boiler's tapered interlocks with the notches on the control box.

MW-6000765-02

MW-6000766-02

230V

24V

MW-6000767-01

MW-6000768-02

MW-6000769-01

5 Installation

20 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

Fig.15

Fig.16

Fig.17

9. Fit the box and slide it forwards.

10. Lock the box using the two screws and toothed washers supplied in the bag with the manual.

11. Tilt the assembly backwards.

12. Connect the two connectors from the boiler to the connectors on the control box.

13. Move the control box back to its original position by tilting it forwards.

Fig.18

Fig.19

14. Lock the control box in position using the two screws and the toothed washers.

15. Close the box cover.

16. Lock the cover by pressing on the screw head.

17. Refit the front door and the rear top panel and refit the two screws and the toothed washers.

5.3 Electrical connections

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 21

5 Installation

5.3.1 Recommendations

Only qualified professionals may carry out electrical connections, always with the power off. Earth the appliance before making any electrical connections. Power the appliance via a circuit that includes an omni-polar switch with contact opening distance of 3 mm or more. When making electrical connections to the mains, respect the polarities.

Danger Position the various electrical cables in such a way that they never touch the heating pipes. Keep the various electrical cables far enough from the heating pipes so that they cannot be damaged by the effect of the heat.

5.3.2 Electrical power supply

Power supply voltage 230 V AC/50 Hz

Caution Please ensure the polarities shown on the terminals are followed, i.e live (L), neutral (N) and earth ( )

5.3.3 Recommended cable cross section

Decide on the cable according to the following information:

Distance of the appliance from the power source. Upstream protection. Neutral operating conditions.

Tab.2 Specifications of the power cable and the power source

Cable cross section 3 x 1.5 mm²

Curve C (circuit breaker) 10 A

Differential 30 mA

MW-2000830-02

MW-2000831-01

MW-2000832-01

90º

5 Installation

22 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

Caution Provide a separate power supply for the pump and a power switch, if necessary. The output available per outlet is 450 W (2 A, with cos ϕ = 0.7) and the inrush current must be less that 16 A. If the load exceeds either of these values, the control must be relayed using a contactor that must in no circumstances be installed in the control panel. The sum of the currents from all outlets must not exceed 5 A.

5.3.4 Cable routing and access to the connection terminal

blocks

Fig.20

Fig.21

1. Unlock the front door.

2. Tilt and lift the door to remove it.

3. Remove the two screws and dismantle the rear top panel.

Fig.22

4. Unlock and open the cover on the control box.

Fig.23

MW-2000833-02

Sensor

230V

L N

MW-2000919-01

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

MW-2000920-01

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 23

5 Installation

5. Ensure that the cables are correctly routed and affix the cable(s) using the traction arrester devices.

230 V 230 V circuits (left)

Sensor Sensor circuits (right)

Danger Separate the sensor cables from the 230 V circuit cables.

6. Connect the boiler's main power supply cable.

Fig.24 to SCB-02

Fig.25 to SCB-02

5.3.5 Connecting a modulating thermostat

The boiler is fitted with an R-Bus connection as standard. This connection is also compatible with OpenTherm. This enables the user to connect OpenTherm modulating thermostats (such as iSense Pro) or R-Bus thermostats (such as eTwist) without any further adjustments being made to the appliance. The boiler is also suitable for OpenTherm Smart Power.

1. In the case of a room thermostat: install the thermostat in a reference room.

2. Connect the two-wire cable for the thermostat to the R-Bus terminals for the connector. It does not matter which wire is connected to which terminal block.

Important If the domestic hot water temperature can be set on the OpenTherm thermostat, the boiler will supply this temperature, with the value set in the boiler as a maximum.

5.3.6 Connecting an on/off thermostat

The boiler is suitable for connection to a two-wire on/off room thermostat (Tk).

1. Fit the thermostat in a reference room.

2. Connect the two-wire cable for the thermostat to the R-Bus terminals of the connector. It does not matter which wire is connected to which terminal block.

MW-2000921-01

TvTk

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

MW-2000922-01

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

MW-2000922-01

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

MW-2000873-01

ToutBL RL

R-Bus

- +

PWM

5 Installation

24 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

5.3.7 Frost protection combined with on/off thermostat

Fig.26 to SCB-02

Fig.27 to SCB-02

When an on/off thermostat is used, the pipes and radiators in a frostsensitive room can be protected by a frost thermostat. The radiator valve in the frost-sensitive room must be open.

1. Place a frost thermostat (Tv) in a frost-sensitive room (e.g. a garage).

2. Connect the frost thermostat (Tv) and the on/off thermostat (Tk) in parallel to the

R-Bus terminals of the connector.

Warning If a Remeha eTwist or OpenTherm thermostat is used, a frost thermostat cannot be connected in parallel to the R-Bus terminals. In this case, ensure frost protection of the central heating system in combination with an outside sensor.

5.3.8 Frost protection combined with outdoor temperature sensor

The central heating system can also be protected against frost in combination with an outdoor temperature sensor. The radiator valve in the frost-sensitive room must be open.

1. Connect the outdoor temperature sensor to the Tout terminals of the connector.

The frost protection works as follows with an outdoor temperature sensor:

If the outdoor temperature is lower than -10 °C: heat demand from the boiler. If the outdoor temperature is higher than -10 °C: no heat demand from the boiler.

Fig.28 to SCB-02

Fig.29 to CB-09

Important The outdoor temperature before the start of frost protection can be changed with the AP080 parameter.

5.3.9 Connecting an outdoor temperature sensor

An outdoor temperature sensor (accessory) can be connected to the Tout terminals of the connector. If the boiler is equipped with an on/off thermostat, the temperature is controlled using the setpoint of the internal heating curve (F). Various parameter settings can be used to change the internal heating curve.

1. Connect the plug from the outdoor temperature sensor to the Tout terminal.

5.3.10 Blocking input

The boiler has a blocking input (normally closed contact). This input relates to the BL terminals of the connector.

If this contact is opened, the boiler will be blocked or locked out.

Change the function of the input by configuring the AP001 parameter.

Important

Remove the bridge if this input is used. Only suitable for potential-free contacts.

5.3.11 Release input

MW-2000874-01

out

BL RL

R-Bus

- +

PWM

MW-2000932-01

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

MW-2000923-01

0-10

Tout

0-10

Tdhw

Tflow

R-Bus

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 25

5 Installation

Fig.30

Fig.31

to CB-09

The boiler has a release input (normally open contact). This input relates to the RL terminals of the connection terminal block.

If this contact is closed when there is a heat demand, the boiler will be blocked after a waiting time.

Change the waiting time of the input by configuring the AP008 parameter.

Important Only suitable for potential-free contacts.

5.3.12 Connecting external sensors

Tdhw Tflow

The sensor connection contacts are dry contacts.

Tank sensor (NTC 10 k Ohm) Boiler flow temperature sensor (NTC 10 k Ohm)

Tout

Outdoor temperature sensor (NTC 10 k Ohm)

5.3.13 Connecting a tank sensor or thermostat

Fig.32 to SCB-02

A sensor or thermostat can be connected to the Tdhw terminals of the connector.

1. Connect the domestic hot water sensor or the tank thermostat to the Tdhw connector.

MW-2000878-02

Tout - +BL RL

R-Bus

PWM

CB-09

Tout - +BL RL

R-Bus

PWM

CB-09

MW-2000879-02

5 Installation

26 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

5.3.14 Connecting a PWM pump

Fig.33

to CB-09

1. Connect the modulating pump to the X4 terminal for the power section and to the PWM terminal for the control section, respecting the pump polarity.

5.3.15 Connecting a standard pump

Fig.34 to CB-09

1. Connect the pump to the X4 terminal on the PCB.

5.3.16

Connecting a domestic hot water (DHW) pump

Connecting a domestic hot water (DHW) pump. The maximum power consumption is 300 VA.

AD-4000123-01

N L

AD-4000015-02

AD-3001306-01

N L

AD-3001312-01

C No

Status A

C No

Status B

AD-3001305-01

0-10

5 Installation

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 27

Fig.35

DHW pump connector

Fig.36 Three-way valve connector

Connect the pump as follows:

Earth

Neutral

Phase

5.3.17 Connecting a three-way valve

Connecting a three-way valve (230 VAC). The connection can be used for a boiler group (zone).

Connect the three-way valve as follows:

Earth

Neutral Open

Closed

5.3.18

Connecting a system pump for mix group (zone) The maximum power consumption is 300 VA.

Connecting a system pump for mix group

Fig.37 Pump connector

Fig.38 Status notifications

Fig.39 0–10 V output connector

Connect the pump as follows:

Earth

Neutral

Phase

5.3.19 Connecting status notifications

The two potential-free contacts, Status, can be configured as required. Depending on the setting, a particular status can be transmitted by the boiler.

Connect a relais as follows:

Normally closed contact. Contact will open when status occurs.

Main contact.

Normally opened contact. Contact will close when status occurs.

Select the desired status notification (setting) using parameter EP018 and EP019.

5.3.20 Connecting 0–10 V output

The 0-10 contact can be used to connect a PWM system pump. The speed of the pump is modulated based on the signal received from the boiler. Depending on the make and type of pump, the pump can be controlled by a 0–10 V or a PWM signal.

Connect the system pump controller to connector 0-10.

Select the type of signal that will be sent from the boiler using the parameter EP029. Select the type of signal that controls the pump using the parameter EP028.

AD-0000054-01

Status 0-10 0-10

Nc NoC

Nc No OTm 0 + 0 +C

OTm 0 + 0 +

IF-01

AD-0000055-01

1 2

2 2

5 Installation

28 MID _HMI T-control - Gas 120 ACE 7717201 - v03 - 25062019

Caution

If possible, use the pump modulation signal. This provides the most accurate pump control. If the automatic burner unit does not support pump modulation, the pump will behave as an on/off pump.

5.3.21 Connection options for the expansion PCB - IF-01

Fig.40 IF-01 PCB

The expansion board IF-01 is pre-installed in the instrument box as standard.

Caution Do not connect a frost thermostat or room thermostat to the boiler if using the 0–10 V control PCB.

Connecting the status relay (Nc)

If the boiler locks out, a relay is de-energised and the alarm can be transmitted via a potential-free contact (maximum 230 V, 1 A) on terminals Nc and C of the connector.

Connection (OTm)

The interface uses OpenTherm to communicate with the boiler control unit. To make this possible, the OTm connection must be connected to the OpenTherm input of the boiler control unit.OTm

Analogue input (0-10 V)

A choice can be made with this control between control based on temperature or heat output. The two controls are described briefly below.

1. Connect the input signal to terminals 0–10 of the connector.

Tab.3 Temperature-based control (°C)

Jumper 2 Input signal (V) Temperature °C Description

0–1.5 0–15 Boiler off

1.5–1.8 15–18 Hysteresis

1.8–10 18–100 Desired temperature

Fig.41 Switch jumper (2)

The 0–10 V signal controls the boiler supply temperature. This control modulates on the basis of flow temperature. The output varies between the minimum and maximum value on the basis of the flow temperature set point calculated by the controller.

A jumper (2) on the interface is used to select either temperature-based control ( ) or output-based control (%).

Tab.4 Control based on heat output

Jumper 2 Input signal (V) Heat output (%) Description

(1)

0–2.0

2.0–2.2

2.0–10

(1) Dependent on the minimum modulation depth (set speeds, standard 20%)

(1)

0–20 Boiler off

20–22 Hysteresis

20–100 Desired heat output

AD-0000056-01

1 1

AD-0001177-01

5 Installation

7717201 - v03 - 25062019 MID _HMI T-control - Gas 120 ACE 29

The 0–10 V signal controls the boiler output. This control modulates on the basis of the heat output. The minimum output is linked to the boiler's modulation depth. The output varies between the minimum and maximum value on the basis of the value defined by the controller.

Analogue output (0–10 V)

Fig.42

Switch jumper (1)

Fig.43 Connecting an interface connector

This feedback can be based on temperature or heat output. The two controls are described briefly below.

A jumper (1) on the interface is used to select either temperature ( ) or output (%).

Tab.5 Temperature message

Jumper 1 Output signal (V) Temperature °C Description

0.5 – Alarm

1–10 10–100 Supplied tempera

ture

Tab.6 Output message

Jumper 2 Output signal (V) Heat output (%) Description

0 0–15 Boiler off

0.5 15–20 Alarm

(1)

2.0–10

(1) Dependent on the minimum modulation depth (set speeds, standard 20%)

20–100 Supplied heat output

5.3.22 Connecting a PC/laptop

There is a Service connector next to the control panel. A Recom interface can be used to connect a PC, laptop or a Smart Service Tool here. Using the Recom PC/laptop service software, you can enter, change and read out various boiler settings.

Connecting an interface connector:

1. Move the Service connector slide upwards.

2. Push the interface connector into place. It should snap shut with a click.

Disconnect the interface connector again:

3. Maintain slight tension on the interface connector

4. Push the slide downwards. The interface connector will now be released.

5. Pull the interface connector from the connector.

+ 67 hidden pages

REMEHA GAS 120 ACE Series, GAS 120 ACE - 65, GAS 120 ACE - 90, GAS 120 ACE - 115 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1 Safety

1.1 General safety instructions

Safety instructions for the installer

Safety instructions for the user

Recommendations

1.3 Liabilities

1.3.1 Manufacturer's liability

1.3.2 Installer's liability

1.3.3 User's liability

2.1 Symbols used

2 About this manual

2.1.1 Symbols used in the manual

2.1.2 Symbols used on the appliance

3 Technical specifications

3.1 Homologations

3.1.1 Standards & Directives

3.1.2 Factory test

3.2 Electrical diagram

3.2.1 Electrical diagram for the MID control unit HMI T-control

4 Description of the product

4.1 General description

Main components

4.3 PCBs

4.3.1 SCB-02 expansion board description

4.3.2 Description of the CB-09 PCB

4.3.3 Description of the IF-01 PCB

4.4 Control panel description

4.4.1 Description of the user interface

4.4.2 Description of the main screen

4.5 Standard delivery

4.6 Accessories & options

5 Installation

5.1 Installation regulations

Unpack and fit the control box

5.3 Electrical connections

5.3.1 Recommendations

5.3.2 Electrical power supply

5.3.3 Recommended cable cross section

5.3.5 Connecting a modulating thermostat

5.3.6 Connecting an on/off thermostat

5.3.7 Frost protection combined with on/off thermostat

5.3.8 Frost protection combined with outdoor temperature sensor

5.3.9 Connecting an outdoor temperature sensor

5.3.10 Blocking input

5.3.11 Release input

5.3.12 Connecting external sensors

5.3.13 Connecting a tank sensor or thermostat

5.3.14 Connecting a PWM pump

5.3.15 Connecting a standard pump

Connecting a domestic hot water (DHW) pump

5.3.17 Connecting a three-way valve

Connecting a system pump for mix group

5.3.19 Connecting status notifications

5.3.20 Connecting 0–10 V output

5.3.21 Connection options for the expansion PCB - IF-01

Connecting the status relay (Nc)

Connection (OTm)

Analogue input (0-10 V)

Analogue output (0–10 V)

5.3.22 Connecting a PC/laptop