Product Information; Important Notices On Use - Bosch Thermotechnik MU 100 Installation Instructions Manual

▶ Point out the possible consequences
(personal injury, including danger to
life or material damage) of non-
existent or improper inspection,
cleaning and maintenance.
▶ Point out the dangers of carbon
monoxide (CO) and recommend the
use of CO detectors.
▶ 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.
MU 100 – 6721831604 (2021/01)
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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
boiler output 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 and wall mounted boilers.
3 control modes can be selected ( Tab. 9, page 26):
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.
Product Information
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