Buderus MCM10 User manual

For heating contractors
Pour le professionel
Please read carefully before
installing and servicing
A lire attentivement avant le
montage et l’entretien
MCM10
6 720 617 648 - 07.1O
en-us Installation Instructions 2
fr Notice d´installation 20
6 720 616 690 (08/2009)

Table of contents
MCM10
2
Table of contents
1 Explanation of symbols and safety instructions 3
1.1 Symbols, explanation of 3
1.2 Safety instructions 3
2 Details about the MCM10 module 4
2.1 Declaration of conformity 4
2.2 Information regarding the documentation 4
2.3 Proper use 4
2.4 Scope of delivery 4
2.5 Accessories 4
2.6 Technical specifications 5
2.6.1 General 5
2.6.2 Dimensions 5
2.6.3 Power connection parameters 5
2.6.4 Measurement values supply temperature sensor 5
2.6.5 Measurement values outdoor temperature sensor 5
2.7 System integration of the MCM10 6
2.7.1 Principles of cascade control 6
2.7.2 Heating controls for MCM10 cascade systems 6
2.7.3 Water heating with MCM10 cascade systems 6
2.7.4 Internal frost protection function 6
2.7.5 Control of one heating pump 7
2.7.6 External switching contact 7
2.7.7 System versions overview 7
2.7.8 Connection of additional modules in case of heating
system controls with 2-wire BUS control 9
3 Installation 10
3.1 Installation 10
3.1.1 Wall mounting 10
3.2 Making the electrical connections 11
3.2.1 Connection of the low voltage part with BUS
connections 11
3.2.2 120 V AC connection 11
3.2.3 Connection of a remote fault indication with optical
and acoustic signal 12
3.2.4 Electrical connection of the outdoor temperature
sensor 12
3.2.5 Electrical connection of the supply temperature
sensor 12
3.2.6 Electrical connection of the external switching
contact 12
3.2.7 Disposal 12
3.3 Installing other accessories 12
4 Start-up and shut-down 13
4.1 Configuration 13
4.2 Commissioning 13
4.3 Configuration reset 13
4.4 Shutting down 13
5 Operating and fault indications 14
5.1 Operating and fault indications via the heating appliance
displays 14
5.2 Fault message via the remote fault indication 14
5.3 Operating and fault indications via LED 14
5.4 Operating and fault indications via the RC35 16
5.5 Replacing the fuse for the heating zone pump
connection 17
6 Environmental protection 18
7Appendix 19

1
Explanation of symbols and safety information
MCM10 3
1 Explanation of symbols and safety information
1.1 Explanation of symbols
Warning symbols
Signal words indicate the seriousness of the hazard in
terms of the consequences of not following the safety
instructions.
•NOTICE indicates possible damage to property or
equipment, but where there is no risk of injury.
•CAUTION indicates possible injury.
•WARNING indicates possible severe injury.
•DANGER indicates possible risk to life.
Important information
Additional symbols
1.2 Safety precautions
BTo ensure proper function, follow these instructions.
BInstall and start up the heating appliance and all
accessories according to the associated instructions.
BUse this accessory exclusively in conjunction with the
controllers and heating appliances listed. Follow the
connection diagram!
BThis accessory has inputs and outputs with different
voltages. Never connect the low voltage side to the
120 V power supply or vice-versa.
BIn case of wall installation: never install this accessory
in wet areas.
BWork on electrical components only if you have the
required training and qualification.
BBefore you start working on the system, disconnect the
heating system from electrical power by shutting off the
emergency shut-off switch or the heating system circuit
breaker.
BSecure against unintentional reconnection.
BIt is not sufficient to simply shut off the controls.
BObserve all applicable electrical codes and
regulations.
Safety instructions in this document are
framed and identified by a warning triangle
which is printed on a grey background.
Electrical hazards are identified by a lightning
symbol surrounded by a warning triangle.
Notes contain important information in cases
where there is no risk of personal injury or
material losses and are identified by the
symbol shown on the left. They are bordered
by horizontal lines above and below the text.
Symbol Meaning
Ba step in an action sequence
Æa reference to a related part in the docu-
ment or to other related documents
•alistentry
– a list entry (second level)

2Details about the MCM10 module
MCM10
4
2 Details about the MCM10 module
2.1 Declaration of conformity
2.2 Information regarding the
documentation
We reserve the right to make technical modifications!
2.3 Proper use
The MCM10 modules are designed to control cascade
systems. A cascade system is a heating system where
several smaller heating appliances are connected in
parallel to achieve a higher output (ÆFig. 12, page 19).
The MCM10 modules are only suitable for controlling
heating appliances with Logamatic EMS BUS.
For floor-standing heaters, the MCM10 module is only
suitable for the activation of gas heaters with modulating
burners without operating conditions.
2.4 Scope of delivery
Fig. 1 Scope of delivery
1MCM10
2Duct connection box
3Sensor well
4Supply temperature sensor FV
5Package with:
- 3 screws and 3 wall-plugs
- 4 strain relief clips and 8 screws
6Installation and operating instructions
BCheck that the delivery is complete.
2.5 Accessories
Here is a list with typical accessories. In order to get a
complete overview of all available accessories, please
contact the manufacturer.
• Outdoor temperature sensor FA for connection to
terminal F (only for system variant 1).
•RC35: Outdoor reset heating system controls with
plaintext display for controlling a heating system with
mixed or unmixed heating zones.
•WM10: Low loss header module for EMS.
•MM10: Mixer module for EMS.
•AM10: Outdoor reset controller with thermostat
connection.
The design and operation of this product
conform to the U.S. and Canadian Directives.
Its conformity is demonstrated by the CSA
designation.
The Declaration of conformity can be
claimed. See the address at the back of this
manual.
Hand all enclosed documents over to the user.
6 720 616 690-02.1TD
1
2
4
3
6
5

2
Details about the MCM10 module
MCM10 5
2.6 Technical specifications
2.6.1 General
2.6.2 Dimensions
Fig. 2 Dimensions
2.6.3 Power connection parameters
2.6.4 Measurement values supply temperature
sensor
2.6.5 Measurement values outdoor temperature
sensor
Designation Unit
Dimensions (ÆFig. 2)
Weight (without packaging) lb (kg) 1.76 (0.8)
Rated voltage MCM10 AC … V 120
Frequency Hz 60
Max. on-site fuse protection of the
input voltage
Amp 10
Power draw MCM10 W 5
Rated voltage BUS DC … V 15
Internal appliance fuse, heating
pump output
Amp 5 AF, ceramic, filled
with sand
Measuring range, supply
temperature sensor
° F ( °C) 32 … 212
(0 … 100)
Measuring range, outside
temperature sensor
° F ( °C) – 40 … 122
( – 40 … 50)
Permissible ambient
temperature MCM10
° F ( °C) 32 … 122
(0 … 50)
Permissible ambient temperature,
supply temperature sensor
° F ( °C) 32 … 212
(0 … 100)
Permissible ambient temperature
outdoor temperature sensor
° F ( °C) – 58 … 212
( – 50 … 100)
Maximum cable length,
2-wire BUS connections
ft (m) (ÆTab. 6, page 11)
Maximum lead lengths,
sensor leads
ft (m) (ÆTab. 7, page 11)
EMC suppression level to IEC 60730
Enclosure rating II in accordance
with IEC 60730
NEMA definition Type 2
Tab. 1 General
2-1/2" (62mm)
6 720 616 690-03.1TD
2-1/2" (62mm)
9-1/4" (235mm)
2-1/4" (58mm) 1-1/2" (37mm)
5-9/16" (142mm)
6-1/2" (165mm)
Pos.1)
1) (ÆFig. 12, page 19)
Interface
AInput Power supply from the power
line or from the previous mod-
ule MCM10
120 V AC,
max. 10 Amp.
BOutput Power supply for additional
MCM10
120 V AC,
max. 10 Amp.
COutput Pump 120 V AC,
max. 250 W
DOutput Remote fault indication zero volt,
max. 120 V,
2Amp.
EInput Supply temperature sensor NTC (ÆTab. 3)
FInput Outdoor temperature sensor NTC (ÆTab. 4)
GInput External switching contact Zero volt
HInput Heating controls
(ON/OFF contact)
24 V DC
IInput Heating controls (propor-
tional interface)
0-10 V DC
J2-wire BUS to the heating controller
(RC35, WM10, MM10)
–
K2-wire BUS from the previous MCM10
module
–
L2-wire BUS to the next MCM10 module –
M2-wire BUS to the heating appliance –
Tab. 2 Power connection parameters
°F ( °C) Ω°F ( °C) Ω
68 (20) 12490 140 (60) 2488
77 (25) 10000 149 (65) 2083
86 (30) 8057 158 (70) 1752
95 (35) 6531 167 (75) 1481
104 (40) 5327 176 (80) 1258
113 (45) 4369 185 (85) 1072
122 (50) 3603 194 (90) 917
131 (55) 2986 203 (95) 788
Tab. 3 Measurement values supply temperature sensor
°F ( °C) Ω°F ( °C) Ω
– 4 ( – 20) 97070 50 (10) 19900
5 ( – 15) 72929 59 (15) 15708
14 ( – 10) 55330 68 (20) 12490
23 ( – 5) 42315 77 (25) 10000
32 (0) 32650 86 (30) 8057
41 (5) 25388 95 (35) 6531
Tab. 4 Measurement values outdoor temperature
sensor

2Details about the MCM10 module
MCM10
6
2.7 System integration of the MCM10
2.7.1 Principles of cascade control
When the heating appliance generates a heat demand
(ÆTab. 5, system versions 1, 2, 3, and 4), initially one
heating appliance is started and, if required, its heat
output is raised to its maximum nominal power. Only then
will another heating appliance be started.
If excessive heat is being generated, heating appliances
are controlled one after another in sequence without
delay down to their respective minimum nominal power,
and then shut down until heat demand and generation
match. With system version 4 all appliances are shut
down simultaneously.
The MCM10 module automatically determines the
sequence in which the heating appliances are controlled.
The MCM10 module safeguards an even distribution of
the burner hours of operation for all heating appliances.
This takes into account heating and DHW. This increases
the heating appliance service life. If the power supply to
the MCM10 module is interrupted, the hours run meters
in the MCM10 module are reset to zero.
As soon as a heating appliance is not able to start (DHW
heating for a directly-connected hot water tank, heating
appliance fault, communication fault with MCM10
module), another heating appliance will be started
automatically to cover the heat demand.
2.7.2 Heating controls for MCM10 cascade
systems
The MCM10 modules stage the heating appliances
based on the heat demand calculated. For control
according to the heat demand, the MCM10 modules
always require heating system controls (ÆFig. 12,
terminals H, I or J, page 19). Depending on the heating
system controls, there are four possible system versions
(ÆTab. 5).
One MCM10 module can control up to four heating
appliances. By connecting up to four MCM10 modules,
up to 16 heating appliances can be linked to form a single
cascade (ÆFig. 12, page 19). In this case, one MCM10
module controls the cascade (MCM10 master).
Depending on the heating system controls used, a
cascade system with up to 4 or up to 16 heating
appliances can be created. The maximum number of
heating appliances that can be connected and the
number of MCM10 modules required for the different
systems are shown in Tab. 5, page 8.
The MCM10 module controls the entire boiler loop
(primary loop including the low loss header). All other
heating system components (secondary side of the low
loss header, such as the heating zones, hot water tank)
can be regulated by a weather-dependent heating
controller with a 2-wire BUS interface and additional
modules (WM10, MM10...). Contact the manufacturer for
further details. You will find the relevant address on the
back cover.
Heating appliances of any output can be part of a
cascade.
2.7.3 Water heating with MCM10 cascade
systems
Hot water tanks can be connected hydraulically and
electrically directly to a heating appliance (storage tank
model).
• Water heating is controlled by the heating appliance.
During a DHW demand, this heating appliance will not
be called by the MCM10 module. In case of demand,
another heating appliance may be started.
• If water heating is timed using a heating system control
with 2-wire BUS connection, the heating appliance
with the storage tank must be connected to the
MCM10 module (master) via terminals 17 and 18.
2.7.4 Internal frost protection function
The MCM10 module is equipped with an internal frost
protection function: if the supply temperature falls below
45 °F ( 7 °C ), a heating appliance starts and runs until a
supply temperature of 60 °F (15 °C) has been achieved.
Any heating pump that is connected to the MCM10
module will also run (Æparagrahp 2.7.5).
BConnect the supply temperature sensor to the MCM10
master module if the internal frost protection function is
required.
Note that, for the correct function, only one
heating system control/building management
system may be connected.
The different system versions require the
connection of certain accessories (supply
temperature sensors, outdoor temperature
sensors, heating pumps, and heating system
controls) (ÆTab. 5, page 8).
If the user wants to prepare hot water using
the 3-way valve of the heating appliance and
he wants to continue supplying the heating
zone, he must switch off the warm water
priority on the RC35 for all heating zones
since with the factory settings, hot water
priority is active by default.
The frost protection function of heating
system controls with 2-BUS interface
provides comprehensive system frost
protection. This requires the connection of an
outdoor temperature sensor.

2
Details about the MCM10 module
MCM10 7
2.7.5 Control of one heating pump
In heating systems with only one heating zone, the heating
pump can be connected directly to the MCM10 module
(master).
The heating pump runs:
• as long as at least one heating appliance pump is
running (if required, set the pump run-on time on the
heating appliance accordingly Æheating appliance
installation instructions); or
• briefly after remaining idle for 24 hours (anti-seizing
protection).
2.7.6 External switching contact
The MCM10 module is equipped with an external
switching contact (ÆFig. 12, pos. G). For the
characteristics of this switch, see ÆTab. 2, page 5.
This external switching contact can be used optionally,
e.g. to connect a temperature switch for protecting the
radiant floor heating against a too-high water temperature.
If the switching contact is opened, all heating appliances
are switched off via the MCM10 module. As soon as the
switching contact is closed again, the heating appliances
are ready for operation again.
2.7.7 System versions overview
As a manufacturer of advanced heating technology, we
give high priority to the development and manufacture of
economical and clean-burning heating appliances. To
guarantee this, our heating appliances are equipped with
modulating burners. To make optimum use of the burner
characteristics, heating system controls with 2-wire BUS
control should be used.
The anti-seizing pump protection lets the
heating pump run at least once every day
even without a heat demand (e.g. during
summer).
BLeave your heating system switched on all
year to prevent the pump (in summer) from
seizing up.

2Details about the MCM10 module
MCM10
8
System version 1: Modulating weather-
compensated heating controller (RC35)
An advantage of this system is the ability of the modules
to communicate, enabling all heating zones to be
controlled (function module WM10 or MM10) with the
MCM10 module via a common BUS, parallel to terminal J
on the MCM10 module (ÆFig. 12, page 19). This
ensures matching generated heat amount to the actual
heat demand of all heating zones in the system. With this
version, the heating system achieves optimum comfort
with maximum energy savings.
System version 2: Modulating weather-
compensated heating controller (AM10)
The supply target temperature of the AM10 module
depends on the outdoor temperature. In contrast to
system version 1, it is not possible to use the WM10 and
MM10 modules.
System version 3: Modulating 0 - 10 V controller,
regulated acc. to output
In conjunction with a building management system with
0 - 10 V interface, the total output of the cascade can be
selected as control variable. Setting is achieved via a
jumper (ÆFig. 3).
System version Symbol forcontroller connection
Heating controller to MCM10
master module Type
Max. number MCM10 Max. number of heating applianceswith BUS-enabled Logamatic EMS
Required accessories with connection to MCM10
(ÆFig. 12, page 19)
1Modulating weather-compensated
controller 2-wire BUS control
RC35 4 16 • Outdoor temperature sensor.
• One WM10 module. The WM10 module is delivered with a
supply temperature sensor (see explanation on the following
page).
• Heating pump (secondary zone) is connected to the WM10
module.
2Modulating weather-compensated
controller 2-wire BUS control
AM10
weather-
compen-
sated con-
troller
416 • Connect outdoor temperature sensor to AM10.
• Common supply temperature sensor on terminal E (only for
internal frost protection).
• Heating pump (secondary zone) (ÆFig. 12, [19]) on termi-
nal C, only in case of one or several heating zones without
heating pump or in case of heating zones that do not com-
municate via BUS modules with the MCM10module.
3Modulating
0 - 10 V controller,e.g. building man-
agement system;
control of the heat output
Any 4 16 • Common supply temperature sensor on terminal E (only for
internal frost protection).
• Heating pump (secondary zone) (ÆFig. 12, [19]) on
terminal C, only with one or several heating zones without
heating pump or with heating zones that are not regulated
via the building management system.
4Modulating
0 - 10 V controller, e.g. building man-
agement system;
supply temperature control
Any 416 • Common supply temperature sensor on terminal E
• Heating pump (secondary zone) (ÆFig. 12, [19]) on
terminal C, only with one or several heating zones without
heating pump or with heating zones that are not regulated
via the building management system.
5ON/OFF controller (zero volt) Any 4 16 • Common supply temperature sensor on terminal E (only for
internal frost protection).
• Heating pump (secondary zone) (ÆFig. 12, [19]) on
terminal C.
Tab. 5 System versions overview
0 ... 10V
0 ... 10V

2
Details about the MCM10 module
MCM10 9
Fig. 3 Setting via jumper
Fig. 4 Correlation between the input voltage and heat
output
UInput voltage
POutput in % of the rated cascade output
System version 4: Modulating 0 - 10 V controller,
regulated to supply temperature
In conjunction with a building management system with
0 - 10 V interface, the supply temperature can be
selected as control variable. Setting is achieved via a
jumper (ÆFig. 3).
Fig. 5 Correlation between the input voltage and the
supply temperature
UInput voltage
VT Supply temperature
System version 5: Heating control with ON/OFF
contact
In conjunction with a control unit with ON/OFF contact,
module MCM10 regulates the cascade output in
accordance with the contact closure respectively up to
maximum output, by starting one appliance after another.
When the contact is opened, all heating appliances are
shut down simultaneously.
The ON/OFF contact of the heating system controls must
be a dry contact.
2.7.8 Connection of additional modules in case of
heating system controls with 2-wire BUS
control
Any additional modules, such as the WM10 and MM10
modules (ÆFig. 12, [21], page 19), must be connected
to the BUS of the heating controller (parallel to terminal J
on the MCM10 module).
6 720 617 648-001.1TD
VT [˚F] P [%]
0246810
6 720 617 648-09.1TD
0
30
50
70
90
U[V DC]
P[%]
194 (90)
167 (75)
140 (60)
113 (45)
86 (30)
59 (15)
0
0246810
6 720 617 648-10.1TD
U[V DC]
[˚F (˚C)] VT

3Installation
MCM10
10
3 Installation
3.1 Installation
3.1.1 Wall mounting
BDetermine the location on the wall in accordance with
the dimensions of the MCM10 module.
BDetermine whether the main power cord is laid in stiff
or flexible ducts that require duct connection box and
appropriate free space under the MCM10.
BUndo two screws at the bottom of the MCM10 module,
pull the cover at the bottom forward and lift off upwards
(ÆFig. 6).
Fig. 6 Removing the cover
BFor the upper attachment screw, drill a Ø 1/4" (6 mm)
hole, insert an appropriate wall anchor, and insert the
screw until only 1/16" (1.5 mm) protrudes (ÆFig. 7).
Fig. 7 Upper attachment screw
BIn the back panel of the MCM10 module, create two
holes for the lower attachment screws using the
breakouts prepared.
BAttach the MCM10 module at the top attachment
screw.
BMark the holes to be drilled on the wall through the
breakouts created.
BRemove the MCM10 module.
BDrill Ø 1/4" (6 mm) holes and insert wall anchors
(ÆFig. 8).
Fig. 8 Insert wall anchor
DANGER: Risk of electric shock!
BBefore connecting the power supply,
interrupt the power supply to the heating
appliances and to all other BUS
subscribers.
7 746 800 090-03.1O
1/4"
3,5 mm
0.05" (1,5mm)
6 720 617 648-02.1O
3.
4.
4.
2.
1.
1/4"
1/4" 3,5 mm
6 720 617 648-03.1O 1/4"
1/4"

3
Installation
MCM10 11
BHook in the MCM10 module at the top attachment
screw and secure with the two lower screws.
BWith the use of stiff or flexible ducts:
– Remove all plastic grommets from the slits on the
lower side of the MCM10;
– push the duct connection to the intended place;
– break out the required number of cable entries by
knocking cautiously with a screwdriver handle;
– mount the duct according to the manufacturer's
instructions.
Note: When using ducts, no plastic grommets are
required.
3.2 Making the electrical connections
BObserve electrical code for the connection and use at
least cable AWG14 for the main power cord.
BAlways route cables through the preassembled
grommets and apply the strain relief supplied to protect
the system against the ingress of dripping water.
BWiring preferably with single core cable. When using
multi-strand (flexible) cables, fit them with wire ferrules.
BCables can be pulled off the contact strip for their
connection to the screw terminals. The connectors are
color-coded and keyed to prevent mismatch of cable
terminals.
3.2.1 Connection of the low voltage part with
BUS connections
The minimum permissible cable cross-section of the 2-
wire BUS connection arises from the cable length:
BRoute all low-voltage cables separately from cables
carrying 120V to avoid inductive interference (minimum
separation 4 inches)(100 mm).
BIn case of inductive external influences, use shielded
cables.
This way, the cables are screened against external
influences (e.g. high-voltage cables, contact wires,
transformer stations, radio and TV devices, amateur
radio stations, microwave devices, etc.).
BWhen sensor leads are extended, apply the following
lead cross-sections:
BTo safeguard the splash-proof rating (IP):
Route cables so that the cable sheath protrudes at
least 0.8" (20 mm) into the cable grommet (ÆFig. 9)
or the duct connection box.
Fig. 9 Splash-proof
3.2.2 120 V AC connection
BOnly use electric cable of similar quality.
BNever connect additional controllers that regulate other
system components to outputs C (pump) and D (fault
signal).
CAUTION: Malfunction!
BAlways wire in accordance with the wiring
diagram (ÆFig. 12, page 19).
BNever connect one BUS to another.
Cable length Min. cross-section
< 325 ft (100 m) AWG 20
325 - 650 ft (100 - 200 m) AWG 18
Tab. 6 Minimum permissible cross-section of the
2-wire BUS connections
Cable length Min. cross-section
< 65 ft (20 m) AWG 20
65 - 100 ft (20 - 30 m) AWG 18
Tab. 7 Sensor lead extension
CAUTION: Risk of pole reversal.
Malfunction through interchanged
connection on the 0 - 10 V interface.
BEnsure connection to the correct poles
(9 = negative, 10 = positive).
CAUTION: The MCM10 module input is not
fuse-protected.
Overloading the outputs can damage the
MCM10 modules.
BProtect the MCM10 module power supply
(master) with a fuse with maximum rating
10 Amp.
CAUTION: Output C (pump) of the MCM10
module has a maximum load capacity of
250 W.
BConnect pumps drawing more current via
relays.
6 720 617 648 - 04.1O
≥1" (25 mm)

3Installation
MCM10
12
BRecommendation when using several MCM10
modules (cascade with more than four heating
appliances): Provide the additional modules with
power via the first MCM10 module (master). This
ensures simultaneous start-up.
3.2.3 Connection of a remote fault indication with
optical and acoustic signal
For example, a fault indicator can be connected to the
zero volt fault contact (ÆFig. 12, terminal D, page 19).
The state of the fault contact is also indicated via an LED
on the MCM10 (ÆTab. 9, page 14).
This is a dry contact that carries a maximum current of 2 A
at 120 V AC.
3.2.4 Electrical connection of the outdoor
temperature sensor
In conjunction with heating system controls with 2-wire
BUS control, always connect outdoor temperature sensor
to the MCM10 module (master) (ÆFig. 12, page 19) and
not to the heating appliance.
3.2.5 Electrical connection of the supply
temperature sensor
For system version 1, the common supply temperature
sensor must be connected to the WM10 (Æinstallation
instructions for WM10) and for the system versions 2, 3,
4, and 5, to the MCM10, terminal E (ÆFig. 12, [18],
page 19).
3.2.6 Electrical connection of the external
switching contact
If an external switching contact must be connected, the
bridge on the plug must be removed first.
3.2.7 Disposal
BDispose of packaging in an environmentally-
responsible manner.
BWhen replacing components, dispose of the old parts
in an environmentally-responsible manner.
3.3 Installing other accessories
BInstall accessories according to the legal requirements
and the installation instructions supplied with them.
BThe BUS subscribers RC35, WM10, and MM10 must
be connected to terminal J (ÆFig. 12, page 19).
The maximum current drawn by the system
components (pump, etc.) must not exceed
specifications (ÆTab. 2, page 5).
Situation Operating status contact
Current on, no fault
Current on, fault
No current
Tab. 8 Operating status contact
The remote fault indication is enabled when
the power supply to the MCM10 module is
interrupted (master) (function check).

4
Start-up and shut-down
MCM10 13
4 Start-up and shut-down
4.1 Configuration
With this configuration, the control characteristics of the
MCM10 module (master) are adapted to the specific
heating system.
The MCM10 module is configured automatically:
• during the first start-up of a MCM10 module,
• during a restart following a reset of the configuration
(Æparagrahp 4.3).
Configuration takes at least five minutes. During
configuration, the LEDs associated with the connected
heating appliances and possibly the LED to indicate BUS
communication (ÆTab. 9) flash. Configuration is
completed and saved to the MCM10 when LEDs stop
flashing.
Any configuration saved remains in the memory, even in
case of power failure.
If, after configuration, a heating appliance (or a MCM10
module) is temporarily shut down during active operation
(e.g. for maintenance), the LED allocated to that
heating appliance or the LED to indicate BUS
communication begins to flash. Following a restart, the
heating appliance (or the MCM10 module) will be
recognized, and the associated LED stops flashing.
4.2 Commissioning
BEnsure the correct connection of all heating system
components.
BProvide the power supply (120 V AC) for all
components of the heating system, except for the
MCM10 modules.
BStart all heating appliances (switch ON).
BProvide the power supply via the power plug of the
(first) MCM10 module. If appropriate, the configuration
will then begin. This will take at least 5 minutes.
BMake the necessary adjustments on the individual BUS
subscribers in accordance with their installation
instructions.
4.3 Configuration reset
Resetting the configuration deletes the system
configuration stored in the MCM10 module. During the
next start, the current system configuration is saved to the
MCM10 module.
BInterrupt the power supply to all MCM10 modules.
BOpen the MCM10 module cover (master) (ÆFig. 6,
page 10).
BRemove jumper (ÆFig. 3, page 9).
BEnsure the correct connection of all heating system
components.
BProvide the power supply (120 V AC) for all
components of the heating system, except for the
MCM10 modules .
BStart all heating appliances (switch ON).
BProvide the power supply via the power plug of the
(first) MCM10 module.
BReinstall the jumper (ÆFig. 3, page 9).
Configuration starts. This will take at least 5 minutes.
BClose the MCM10 module cover (ÆFig. 6, page 10).
4.4 Shutting down
To take the heating system out of use:
BInterrupt the power supply to all MCM10 modules and
all heating appliances.
Troubleshooting in case of faults becomes
more difficult if the saved configuration does
not match the actual configuration of the
heating system.
BExecute a reset after any intended/
remaining modification of the system
configuration (Æsection 4.3) to save the
new system configuration in the MCM10
module (master).
The cascade configuration is set during start-
up and after a reset (Æparagrahp 4.1).
BMonitor the LEDs during configuration to
detect cable breaks or wiring faults.
The heating system configuration is saved in
the MCM10 master. Resetting the MCM10
master deletes the entire configuration
(including from the other MCM10 modules).
CAUTION: Malfunction!
BWhen using system version 2 or 3, ensure
the correct position when reinstalling the
jumper.
WARNING: System damage due to frost.
BEnsure frost protection if the heating
system is to remain out of use for longer
periods (Æheating appliance installation
instructions).

5Operating and fault indications
MCM10
14
5 Operating and fault indications
Operating state and faults can be indicated in four
different ways:
• via the heating appliance displays;
• via the remote fault indication;
• via the LEDs on the MCM10 module;
• via the display of the RC35 system controller.
5.1 Operating and fault indications via
the heating appliance displays
The operating and fault indications for each heating
appliance can be checked via the heating appliance
displays. For further details about the operating and fault
indications, see the heating appliance documentation.
5.2 Fault message via the remote fault
indication
For example, a fault indicator can be connected to the
zero volt fault contact (Æparagrahp 3.2.3, page 12). The
state of the remote fault indication is also shown via an
LED on the MCM10 (ÆTab. 9, page 14).
5.3 Operating and fault indications via
LED
Generally, three different states in the overall system can
be identified:
• Configuration (during start-up and after a reset);
• standard operation;
• fault.
Depending on the state of the overall system, the LEDs on
the MCM10 module (ÆFig. 10, page 14) provide
indications about the operating and fault state of
individual components, and thereby enable specific
troubleshooting (ÆTab. 9, page 14).
Fig. 10 Operating and fault indications via LED
1Line voltage (green)
2Heating pump (secondary zone) (green)
3Switching contact for remote fault indication 120 VAC
(red)
4Communication between MCM10s (green)
5Heating appliance 1 (green)
6Heating appliance 2 (green)
7Heating appliance 3 (green)
8Heating appliance 4 (green)
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4
5 6 7 8
LED OFF ON Flashing
No. Function Diagnosis Remedy Diagnosis Remedy Diagnosis Remedy
1Line volt-
age
Fault: No line volt-
age.
Check power sup-
ply.
Replace MCM10
module.
Operation: Stan-
dard operation.
–
2Heating
pump
Operation: Pump
OFF
Operation: Pump
ON.
–
Fault: Pump will not
start although the
LED is ON, as the
fuse for pump out-
put has blown.
Replace fuse
(Æparagrahp 5.5,
page 17).
Tab. 9 Operating and fault indications on the MCM10 module

5
Operating and fault indications
MCM10 15
3Switching
contact for
remote
fault indica-
tion
120 VAC
Operation: Switch-
ing contact not acti-
vated; not a fault.
– Fault: no heating
appliance attached
to the MCM10 oper-
ational.
Remove fault(s) on
the heating appli-
ance(s).
Fault: Switching
contact activated,
but no line voltage.
Check power sup-
ply.
Replace MCM10
module.
Fault: Supply tem-
perature sensor
defective.
Check temperature
sensor on the
MCM10 master and
its lead.
Replace the
MCM10 module.
Fault: System pres-
sure too low.
Add water to the
system.
Fault: no communi-
cation between the
MCM10 module
and all connected
heating appliances
for at least 1 minute.
Check the corre-
sponding connec-
tion cable.
Replace MCM10
module.
4Communi-
cation
Operation: No
communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Standard operating
mode with only one
MCM10 module or
with the MCM10
master without
2-wire BUS control-
ler.
Operation:
Communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
– Configuration:
Communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Wait until the con-
figuration has com-
pleted. The LED will
then be illuminated
steadily.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Check the corre-
sponding connec-
tion cable.
Replace the
MCM10 module or
heating controller.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS),
although these com-
ponents are
installed.
Check the corre-
sponding connec-
tion cable.
Replace the
MCM10 module or
heating controller.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS)
because these com-
ponents have been
deliberately
removed
Reset the configura-
tion
(Æparagrahp 4.3).
LED OFF ON Flashing
No. Function Diagnosis Remedy Diagnosis Remedy Diagnosis Remedy
Tab. 9 Operating and fault indications on the MCM10 module

5Operating and fault indications
MCM10
16
5.4 Operating and fault indications via
the RC35
The operating and fault indications of all heating
appliances and the MCM10 module can be checked on
the heating controller with 2-wire BUS control. The
meaning of the display indications of the MCM10 are
described in table 10. The meaning of the other display
indications are described in the documentation for the
controller and the boiler.
5,
6,
7,
8
Heating
appliance 1
heating
appliance 2
heating
appliance 3
heating
appliance 4
Operation: No heat
demand to the heat-
ing appliance; heat-
ing appliance
operational
– Operation: Heat
demand to the heat-
ing appliance; heat-
ing appliance in
operation
– Configuration:
Communication
between this heat-
ing appliance and
the MCM10 module.
Wait until the con-
figuration has com-
pleted.
Operation: No
heating appliance
connected
– Fault: Heating
appliance fault
Remove fault on the
heating appliance.
Configuration/
Fault: No communi-
cation between the
MCM10 module
and this heating
appliance, although
it is installed.
Check the corre-
sponding connec-
tion cable.
Remove fault on the
heating appliance.
Replace MCM10
module.
Fault: No communi-
cation between the
MCM10 module
and this heating
appliance because it
has been deliber-
ately removed.
Reset the configura-
tion
(Æparagrahp 4.3).
Fault: Communica-
tion error between
the MCM10 mod-
ule and heating
appliance. 1)
Check the corre-
sponding connec-
tion cable.
Replace MCM10
module.
1) Another heating appliance will be enabled automatically in case of heat demand.
LED OFF ON Flashing
No. Function Diagnosis Remedy Diagnosis Remedy Diagnosis Remedy
Tab. 9 Operating and fault indications on the MCM10 module
Indica-
tor Description Remedy
5H Break in BUS communication • Display with fewer than 4 heating appliances.
• Check connecting cable between the boiler and the MCM10 module for cable breaks.
• Check whether the cable makes good contact.
• Check whether this fault originates from a boiler (Æboiler installation instructions).
• Replace MCM10 module.
4U
4Y
The contacts for the supply sensor
have been interrupted (4Y) or have
shorted (4U).
• Check supply temperature sensor and connecting lead.
• Replace MCM10 module.
EF Internal electronic fault • If the fault is indicated as being applicable to one of the boilers: Replace the PCB on the relevant
boiler.
• If the fault is not indicated as attributable to one of the boilers: Replace the MCM10 module.
8Y The external switch contact is open. • Check the cable of the external switching contact for cable breaks.
• Check whether the connection plug is present.
• Replace MCM10 module.
AE Jumper configuration error. • Check whether the jumper is attached correctly.
AU The calculated boiler water temper-
ature is not achieved in timely fash-
ion.
• Check whether enough heating appliances are working.
AY An error has occurred on one or
more heating appliances.
• Eliminate the error on the corresponding boiler.
Tab. 10 Operating and fault indications via the RC35

5
Operating and fault indications
MCM10 17
5.5 Replacing the fuse for the heating
zone pump connection
BInterrupt the power supply.
BOpen the MCM10 module cover (master) (ÆFig. 6,
page 6).
BReplace fuse [1] with one of the same type (5 AF,
ceramic, filled with sand). A spare fuse [2] is provided
in the MCM10 module cover.
Fig. 11 Replacing the fuse
BClose the MCM10 module cover (ÆFig. 6, page 6).
7 746 800 090-11.1O
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6Environmental protection
MCM10
18
6 Environmental protection
Environmental protection is a corporate principle of
Buderus.
We regard quality of performance, economy and
environmental protection as equal objectives.
Environmental protection laws and regulations are
adhered to strictly.
To protect the environment, we use the best possible
technology and materials taking into account economic
points of view.
Packaging
For the packaging, we participate in the country-specific
recycling systems, which guarantee optimal recycling.
All packaging materials used are environmentally-friendly
and recyclable.
Old appliances
Old appliances contain resources that must be submitted
for recycling.
The components are easy to separate and the plastics are
marked. This allows the various components to be sorted
for appropriate recycling or disposal.

7
Appendix
MCM10 19
7 Appendix
Fig. 12 Wiring diagram
IMCM10 No. 1 (master)
II MCM10 No. 2 (slave)
III MCM10 No. 3 (slave)
IV MCM10 No. 4 (slave)
1…16 Heating appliance
17 Low loss header
18 Common supply temperature sensor FV
19 Heating pump
20 Fuse for heating zone pump connection
21 Replacement fuse
22 Heating zone
23 Jumper
AMain power connection
BPower supply for additional modules MCM10
CHeating zone pump connection
DRemote fault indication connection
ESupply temperature sensor (FV) [1-2] 1)
FOutdoor temperature sensor (FA)
connection [3-4] 1)
GConnection of external switching contact [5-6] 1)
HON/OFF contact connection [7-8] 1)
IBuilding management system (0 - 10 V interface)
connection [9-10] 1)
JHeating controller with 2-wire BUS control connection
[11-12] 1)
KConnection from the previous MCM10 module [13-14]
1)
LConnection to the next MCM10 module [15-16] 1)
MConnection of heating appliances [17-18, 19-20, 21-
22, 23-24] 1)
IV
I
120
VAC
ADF
0 ... 10V
H I J
B C E K L M M
A
K
III
A
K
B
M M M MM M M M
L
II
A
K
B
M M M M
L
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
MM
19
22
18
17
20
21
23
120 120
5 Amp
G
AF
6 720 617 648 - 06.1o
1) terminals

Table des matières
MCM10
20
Table des matières
1 Consignes de sécurité et explication des
symboles 21
1.1 Explication des symboles 21
1.2 Mesures de sécurité 21
2 Caractéristiques du module MCM10 22
2.1 Déclaration de conformité 22
2.2 Informations sur la documentation 22
2.3 Utilisation conforme 22
2.4 Pièces fournies 22
2.5 Accessoires 22
2.6 Caractéristiques techniques 23
2.6.1 Généralités 23
2.6.2 Dimensions 23
2.6.3 Paramètres du raccordement électrique 23
2.6.4 Valeurs mesurées par la sonde de température de départ
23
2.6.5 Valeurs de résistance de la sonde de température
extérieure 23
2.7 Intégration du système de l' MCM10 24
2.7.1 Principe de fonctionnement de la régulation en
cascade 24
2.7.2 Régulation du chauffage sur les systèmes en cascade
MCM10 24
2.7.3 Production d'eau chaude avec les systèmes en cascade
MCM10 24
2.7.4 Fonction antigel intégrée 25
2.7.5 Commande d'un circulateur secondaire 25
2.7.6 Contact de commutation externe 25
2.7.7 Vue d'ensemble des variantes du système 26
2.7.8 Raccordement d'autres modules à un thermostat avec
commande BUS bifilaire 27
3 Installation 28
3.1 Montage 28
3.1.1 Montage au mur 28
3.2 Branchement électrique 30
3.2.1 Raccordement de pièce à basse tension avec connexion
BUS 30
3.2.2 Raccord 120 V CA 30
3.2.3 Raccordement d'un système de signalement à distance
avec alarmes visuelles et acoustiques 31
3.2.4 Raccordement électrique de la sonde de température
extérieure 31
3.2.5 Raccordement électrique de la sonde départ 31
3.2.6 Raccordement électrique du contact de commutation
externe 31
3.2.7 Recyclage 31
3.3 Montage des accessoires 31
4 Mise en service et mise hors service 32
4.1 Configuration 32
4.2 Mise en service 32
4.3 Réinitialisation de la configuration 32
4.4 Mise hors service 33
5 Indication de fonctionnement et de panne 34
5.1 Indication de fonctionnement et de panne via l'écran des
chaudières 34
5.2 Indication des pannes via le système de signalement à
distance 34
5.3 Indication de fonctionnement et de panne via les
LED 34
5.4 Indication de fonctionnement et de panne via le
RC35 36
5.5 Remplacement du fusible pour le raccordement du
circulateur secondaire 38
6 Protection de l’environnement 39
7 Annexes 40