Commissioning; Setting The Coding Switch; Commissioning Of The System And Module; Settings For Systems With A Cascade Module In The Bus System - Bosch MC 400 Manual De Instalación Para El Técnico

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Commissioning

First make all electrical connections and then carry out the
commissioning!
▶ Observe the installation instructions for all components and
assemblies in the system.
▶ Only switch on the power supply after all modules are set up.
4.1

Setting the coding switch

When the coding switch is in a valid position and communication is
established via the BUS system, the status indicator lights up green
continuously. When the coding switch is in an invalid or intermediate
position, the status indicator initially does not light up then lights up red.
If the coding switch on a higher level module MC 400 is set to 10 and
there is a direct BUS connection between a heat source and this module,
the system cannot be commissioned.
4.2

Commissioning of the system and module

NOTICE:
Risk of damage to system through pump failure!
▶ Fill and vent the system before switching it on so that the pumps do
not run dry.
If an IGM is installed, the following points must be observed:
▶ At the IGM set the maximum and minimum performance for the
connected device.
▶ Set the maximum performance to at least 5 kW, since otherwise the
IGM is not used by the cascade control.
▶ If the connected device is a two-point device, set maximum
performance = minimum performance.
1. Isolate all poles of the mains voltage and secure against
reconnection.
2. Make sure the mains voltage is disconnected.
3. Connect all required sensors and actuators.
4. Mechanically establish the power supply (230 V AC) at all installed
modules and heat sources.
4.2.1 Settings for systems with a cascade module in the BUS
system
1. Adjust the control strategy with the coding switch on the cascade
module.
2. Set the coding switch at other modules, if necessary.
3. Switch on the power supply (mains voltage) to the entire system.
The module MC 400 detects the connected heat sources. This can
take up to 5 minutes depending on the number. During this time there
is no response to the heat command of the control unit. Once the first
heat source is detected, the MC 400 activates the supply voltage of
the control unit with BUS system EMS 2/EMS plus (CON).
Once the status indicator on the module lights up green constantly:
4. Put the control unit into operation as described in the accompanying
installation instructions and make the appropriate settings.
5. Set room influence on the control unit to 0.
6. Check the settings on the control unit for the cascade and adjust
them to the installed system if required.
MC 400 – 6720890243 (2018/12)
4.2.2 Settings for systems with 2 or more cascade modules in the
BUS system
Up to 16 heat sources can be installed in one system. In such cases,
there is one higher level cascade module and 1 to 4 lower level cascade
modules.
1. Adjust the control strategy with the coding switch at the higher level
cascade module.
2. Set the coding switch at the lower level cascade modules to 10.
3. Set the coding switch at other modules, if necessary.
4. Switch on the heat source power supply.
5. Switch on the power supply for modules.
The MC 400 detect the connected heat sources and other MC 400
(lower level modules) if available. This can take up to 5 minutes
depending on the number. During this time there is no response to
the heat command of the control unit. Once the first heat source is
detected, the MC 400 activates the supply voltage of the control unit
with BUS system EMS 2/EMS plus (CON).
6. Put the control unit into operation as described in the accompanying
installation instructions and make the appropriate settings.
7. Set room influence on the control unit to 0.
8. Check the settings on the control unit for the cascade and adjust
them to the installed system if required.
4.3 Status display for the heat source/lower level
cascade modules at the higher level cascade module
In addition to the coding switch, the module has 4 LEDs that indicate the
respective status of the connected heat source/modules.
• LED 1, 2, 3 and 4 indicate the status of the heat sources/lower level
cascade modules connected to the module:
– off: disconnection or no communication
– red: heat source found but connection interrupted or heat source
fault
– yellow: heat source connected, no heat demand
– flashing yellow: heat source found, heat demand exists, but the
burner is off
– green: lower level module found or heat source found, heat
demand exists, burner is operating, heating active
– flashing green: lower level module found or heat source found,
heat demand exists, burner is operating, DHW heating active
4.4 Status display for the heat source at the lower level
cascade module
In addition to the coding switch, the module has 4 LEDs that indicate the
respective status of the connected heat source/modules.
• LED 1, 2, 3 and 4 indicate the status of the corresponding heat
source:
– off: disconnection or no communication
– red: cascade module found or heat source found, but connection
interrupted or heat source fault
– yellow: heat source connected, no heat demand
– flashing yellow: heat source found, heat demand exists, but the
burner is off (for example if the standby period of the heat source
is active)
– green: heat source found, heat demand exists, burner is
operating, heating active
– flashing green: heat source found, heat demand exists, burner is
operating, DHW heating active
Commissioning
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