Product Information; Important Notices On Use - Bosch MU 100 Installation Instruction

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.
▶ In particular, point out the following:
– Alterations and repairs must only
be carried out by an approved
contractor.
– Safe and environmentally
compatible operation requires
inspection at least once a year and
responsive cleaning and
maintenance.
▶ Point out the possible consequences
(personal injury, including danger to
life or material damage) of non-
existent or improper inspection,
cleaning and maintenance.
▶ Leave the installation instructions and
the operating instructions with the
user for safekeeping.
H Damage caused by frost
The system can freeze if it is switched
off:
▶ Observe the notices regarding frost
protection.
▶ Due to the additional functions, e.g.
DHW heating or pump anti-seizure
protection, the system should always
be left on.
▶ Have faults rectified immediately.
16
2

Product Information

• The module serves as an expansion module for EMS and
EMS 2/EMS plus boilers.
• The module can adjust the boiler flow temperature or the
output of the wall-mounted indoor unit via an external
control signal with 0–10 V (direct voltage).
• The module signals faults in the wall-mounted indoor unit
and system faults, apart from service displays, faults in
external controllers or maintenance for the installer.
• In the case of gas wall-mounted indoor units, the module
can be used to activate a second solenoid valve.
• The module serves as the modulating speed control "Flow
Control" of a boiler circulation pump (0-10 V or PWM) in
combination with a low loss header or heat exchanger.
The boiler circulation pump adapts the flow rate on the
boiler side and prevents an increase in the return
temperature of the boiler. The objective is to optimise the
utilisation of calorific value and to save power. The choice of
0-10 V or pulse width modulation signal makes the function
suitable for floor-standing heat sources and wall-mounted
indoor units.
3 control modes can be selected ( Tab. 8, page 11):
1. Heat exchanger (Diff-T.Flow/Return boiler): control with
reference to temperature differential between heating flow
and heating return (recommended for heat exchanger; flow
temperature sensor T0 is optional)
2. Burner output: Output control proportional to the boiler
output (if additional sensor is not T0 possible)
3. Low loss header (Diff.-Flow-T.Boiler-header): control with
reference to temperature differential between heating flow
and system flow T0 (recommended for low loss header)
2.1

Important notices on use

• The range of functions depends on the control unit
installed. Detailed information on control units can be
found in the technical guide and on the website of the
manufacturer.
• The installation room must be appropriate for the IP rating
stated in the technical data of the module.
MU 100 – 6721804146 (2019/10)