Connecting the Gateway to specific boilers and heatpumps

If you cannot use the service connector, you have to use the EMS bus terminals or wires to connect the Gateway to. Below a number of examples for specific boilers and brands.

Heatpumps almost all have a service jack. See the previous page.

Bosch

Condens

Bosch Condens 2300i W, GC2300 W 24/30 C, GC2300i W 24/30 C

EMS Bus terminal Bosch 2300i W

Condens 2500W, WBC 24-1 DE, WBC 28-1 DCE

This boiler has a combined EMS and on/off thermostat connector. If it has an on/off thermostat you cannot use the Gateway. In this case replace the on/off thermostat with an EMS thermostat.

EMS Bus terminal Bosch 2500

Bosch Condens 7000iW, GC7000iW 35, GC7000iW 35 C, GC7000iW 42

EMS Bus terminal Bosch 7000iW

Other Bosch

Some other Bosch boilers are rebranded ones from Buderus and Junkers. If your boiler is not listed above, check the other brands for a matching picture.

Buderus

Logamatic

Logamatic MC110

EMS Bus terminal Buderus Logamatic MC110

Logamatic 4121

This controller has an EMS bus but it does not provide meaningful interaction with the Gateway! The connector listed below is only for reference. You cannot use a Gateway with this controller.

EMS Bus terminal Buderus Logamatic 4121

Logamax

Logamax Plus GB192 i

EMS Bus terminal Bosch 9000i

Other Buderus

Some other Buderus boilers are rebranded ones from Bosch and Junkers. If your boiler is not listed above, check the other brands for a matching picture.

Nefit

9000i

9000i HR(C) (AquaPower Plus) 25/35/50

All Nefit Bosch 9000i HR(C) (AquaPower Plus) 25/35/50

EMS Bus terminal Nefit Bosch 9000i HR(C) (AquaPower Plus) 25/35/50

Trendline

Nefit Trendline II HR(C)

EMS Bus terminal Nefit Trendline II HR(C)

Topline

Nefit TopLine 25/30/45

EMS Bus terminal Nefit TopLine 25/30/45

Nefit TopLine 70/100

EMS Bus terminal Nefit TopLine 70-100

Nefit TopLine II HR(C) 25/30/45

EMS Bus terminal Nefit TopLine II HR(C) 25/30/45

Nefit TopLine II HR 50/70/100

EMS Bus terminal TopLine II HR 50/70/100

Proline

Nefit Proline

EMS Bus terminal Nefit Proline

Baseline

Nefit Baseline

EMS Bus terminal Nefit Baseline

Nefit Bosch Heat pumps

Allmost all tower, solar, split, hybrid, mono block heat pumps

EMS Bus terminal Nefit Bosch heat pumps

Smartline

Smartline HR 11/24, HRC 24/CW3, HRC 24/CW4

Indien de Smartline is uitgerust met een RCC module op de EMS connector, verwijder deze dan en sluit tevens een EMS thermostaat aan. De RCC module is een klein wit blokje.

EMS Bus terminal Nefit Smartline

Junkers

Cerapur

Most Junkers Cerapur have terminals marked ‘BB’.

EMS Bus terminal Junkers general

Cerapur Modul

EMS Bus terminal Junkers Cerapur Modul

Logamax 8000 i

EMS Bus terminal Bosch 9000i

Other Junkers

Some other Junkers boilers are rebranded ones from Buderus and Bosch. If your boiler is not listed above, check the other brands for a matching picture.

Worcester

Most Worcester Greenstar boilers are the same as Junkers above.

Greenstar 8000

Remove the front cover, flip down the control board, and remove the plastic cover on the back.

Connect the Gateway to the BUS terminal on the right.

Bus terminal Worcester 8000

Other Greenstar

Some Greenstar boilers are not intended to be used with a thermostat and in that case the BB connector is missing from the circuit board. You cannot add a Gateway to such a boiler as these boilers do not have an EMS bus.

BB EMS Bus terminal Worcester

Some older Worcester boilers do have the BB connector but the EMS bus is only active when the optional integral diverter valve is installed. Please check if there is about 14,5V-15,5V on the BB pins. If there is only a few mV the EMS bus is not active on this connector. In these cases the EMS bus may be active on another header on the circuit board. Check if there is about 14,5V-15,5V on the two outer pins on this connector. If so, disconnect the boiler from mains power and solder a wire to these two pins. This can then be connected to the screw terminal of the Gateway.

See below:

Alternative EMS Bus connection on Greenstar CDI

Warning

The exposed circuit board has main voltage present so be careful!

Highflow 440CDi, 550CDi

EMS Bus terminal Worcester Greenstar

Greenstar i System Compact 27i, 30i

EMS Bus terminal Worcester Greenstar 27i 30i

Greenstar i Combi 25i, 30i

EMS Bus terminal Worcester Greenstar i

Other Worcester

Some other Worcester boilers are rebranded ones from Buderus and Junkers. If your boiler is not listed above, check the other brands for a matching picture.

Sieger

BK15

Sieger BK15

EMS Bus terminal Sieger BK15