Product Information; System Requirements - Bosch EMS-2 Notice D'installation

H Intended use
▶ Use the product only to control heating systems.
Any other use is considered inappropriate. We take no
responsibility for damage caused through incorrect
use.
H Installation, commissioning and maintenance
Installation, commissioning and maintenance must
only be carried out by a competent person.
▶ Never install the product in wet rooms.
▶ Only use genuine spare parts.
H Electrical work
Electrical work must only be carried out by a qualified
electrician.
▶ Before starting electrical work:
– Isolate all poles of the mains power supply and
secure against reconnection.
– Make sure the mains voltage is disconnected.
▶ The product requires different voltages.
Do not connect the extra-low voltage side to the
mains voltage or vice versa.
▶ Also observe the connection diagrams of other
system components.
H Handover to the user
When handing over, instruct the user how to operate
the heating system and inform the user about its
operating conditions.
▶ Explain how to operate the heating system and draw
the user's attention to any safety relevant action
▶ Explain that conversions and repairs must only be
carried out by a competent person.
▶ Point out the need for inspections and maintenance
for safe and environmentally-compatible operation.
▶ Leave the installation instructions and the
operating instructions with the user for
safekeeping.
H Damage caused by frost
The solar system can freeze if it is switched off:
▶ Observe the notices regarding frost protection.
▶ Due to the additional functions, e.g. DHW heating or
anti-seizing function, the system should always be
left on.
▶ Correct any faults immediately.
ME 200 – 6720884576 (2019/08)
2

Product Information

The module allows an alternative heat source to be connected to a EMS 2
control system. An alternative heat source might be a wood stove with
water routing or biomass boiler.
The system can be extended to incorporate an additional wall mounted
boiler or floor standing boiler, or also solar or other external heat sources
for heating the buffer cylinder. See for example the wiring diagram on
page 91 at the end of the document.
• The purpose of the module is to connect an alternative heat source to
a EMS 2 control system. As an option, the alternative heat source can
also be controlled.
• The purpose of this module is to block/release a conventional EMS 2
heat source.
• The purpose of this module is to control charging and discharging of
the cylinder with corresponding pump assembly and valves.
• The purpose of the module is to record the buffer cylinder, system
flow, outside temperature and the flow, flue gas and return
temperatures in the alternative heat source.
The combination options for the modules are shown in the connection
diagrams.
2.1

System requirements

• For the module to communicate via the EMS 2 BUS interface, the
following control unit must be incorporated into the system:
– CW 400/CW 800 from software version NF18.04
• The module only communicates with conventional heat sources with
the EMS 2 control system.
• GC 7000i W and all combi boilers GC 7000i W ... C are not suitable
for operation with an alternative heat source. This would pose a
danger of overheating because the DHW heating is restricted to max.
60 °C.
• The interlock of the conventional heat source via the BUS interface
EMS 2 is supported when using the following control units:
– MX25 from V1.44
• The ME 200 module provides the option of blocking the conventional
heat source if there is sufficient heat in the buffer cylinder.
Alternatively, this can be blocked via the BUS interface EMS 2 for
DHW and heating separately or via the OEV terminal using the
analogue "external inputs" on the heat source. For the interlock to
take place via the OEV terminal, the heating water and DHW must be
supplied via the buffer cylinder. In this case, hydraulic configurations
in which DHW is charged directly by the gas/oil boiler (without buffer
cylinder) cannot be implemented.
• When using separate cylinder charging for DHW heating in wall
mounted conventional heat sources, one or more heating circuit
modules MM 100 (address 9 or 10) are required to control the DHW
function.
• To charge the buffer cylinder via the ME 200, the alternative heat
source must be water routing and must allow installation of a flow
temperature sensor. If the flow temperature sensor does not become
warm when the pump is not running, a flue gas temperature sensor is
also required.
• To control the alternative heat source, it must have a suitable
connection (volt free contact for On/Off signal and an optional 0-10 V
output-regulated interface).
• An alternative heat source with return temperature increase via
electrical mixer requires a return temperature sensor downstream of
the mixer.
• To ensure the heating system works efficiently, use a type Bosch B...-
6 buffer cylinder or newer model.
Product Information
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