Connecting The On/Off Room Temperature-Dependent Control Unit; Connecting The Modulating Controller; Connecting An External Switching Contact; Connecting An Outside Temperature Sensor (Accessory) - Bosch Condens 5000W Installation And Maintenance Instructions Manual

Electrical connection
6.4 Connecting the on/off room temperature-dependent
control unit
All standard potential-free on/off room temperature-dependent control
units without heat acceleration element (anticipation resistor) can be
connected.
▶ Connect the on/off room temperature-dependent control unit via the
green plug on the terminal strip [1]. The maximum permissible
electrical resistance of this cable is 100 Ω.
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Fig. 31 Connecting the on/off room temperature-dependent control
unit
6.5

Connecting the modulating controller

The following modulating controllers can be connected:
• Fx controller
• IGM, IPM
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).
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Fig. 32 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 wall mounted gas
condensing boiler is switched off and the code "d3" appears in the
display of the wall mounted gas condensing boiler.
All standard, potential-free switching contacts can be connected for use
as external switching contact.
▶ Remove the jumper of the red plug [1].
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▶ Connect the external switching contact via the red plug on the
terminal strip [1].
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Fig. 33 Connection of an external switching contact
6.7 Connecting an outside temperature sensor
(accessory)
Only one outside temperature sensor that can be combined with the
connected controller can be used at the wall mounted gas condensing
boiler.
▶ Connect the outside temperature sensor via the blue plug at the
terminal strip [1].
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Fig. 34 Connecting the outside temperature sensor
6.8

Connecting a cylinder temperature sensor

Connection is not possible.
6.9

Connecting the 3-way valve

Connection 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).
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