Connecting The Modulating Controller; Connecting An External Switching Contact; Connecting An Outside Temperature Sensor (Accessory); Connecting A Cylinder Temperature Sensor - Bosch Worcester GB162-50 V2 Installation, Commissioning And Servicing Instructions

Electrical connection
▶ Install the RTH convertor as specified in the accompanying wiring
instructions.
6.5

Connecting the modulating controller

The following modulating controllers can be connected:
• Greenstar Sense II
• Commercial 8000 controls range
For more information on other controllers and modules
that can be used, please consult the manufacturer. You
will find the relevant addresses on the back cover of
these instructions.
▶ Install the modulating controller as specified in the accompanying
instructions.
▶ Connect the modulating controller via the orange plug on the terminal
strip [1] (BUS cable).
13 12 11 10 9 8 7 6 5 4 3 2 1
Fig. 55 Connection of the modulating controller
6.6

Connecting an external switching contact

An optional external switching contact can be used (to protect the
underfloor heating system from excessive boiler temperatures for
example). If the external switching contact opens, the boiler is switched
off and the code "d3" appears on the boiler display.
All standard, potential-free switching contacts can be connected for use
as external switching contacts.
▶ Remove the jumper in the red plug [1].
▶ Connect the external switching contact via the red plug on the
terminal strip [1].
13 12 11 10 9 8 7 6 5 4 3 2 1
Fig. 56 Connection of an external switching contact
6.7 Connecting an outside temperature sensor
(accessory)
Only one outside temperature sensor can be combined
with the installed controller.
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▶ Connect the outside temperature sensor, supplied with weather
compensating controller, via the blue connector block on the
terminal strip [1].
1
13 12 11 10 9 8 7 6 5 4 3 2 1
Fig. 57 Connecting the outside temperature sensor
6.8

Connecting a cylinder temperature sensor

Connection to the grey connector block is not possible.
6.9

Connecting the 3-way valve

Connection to the turquoise connector block is not possible.
6.10

Connecting the function module (accessory)

For the assembly and combination options of the
function modules, refer to the relevant installation
instructions of the function modules.
▶ Connect the BUS cable to the connection for the modulating
controller ( chapter 6.5).
▶ Connect the power supply of the function module to the connector
block [1]. Use the power cable supplied with the function module for
this.
1 1
Fig. 58 Connecting the mains voltage
6.11

Connecting the cylinder primary pump

Connection to the grey pump connector block is not possible.
6.12

Connecting the hot water circulation pump

Connection to the purple connector block is not possible.
6.13

Connecting the pump

With pump group:
▶ Connect the control signal wire from the pump to the white plug of
the terminal strip [1].
▶ Remove the green plug [2] from the terminal strip.
▶ Connect the pump's power cable to the terminal strip [2].
▶ Fasten both cables using the strain relief devices mounted
beforehand on the cables.
Without pump group:
▶ Slide the strain relief (provided) over the power cable of the pump.
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6720814332 (2018/04)