Viessmann EM-M1 Quick guide

Installation and service instructions
for contractors
VIESMANN
Mixer extension kit
ADIO electronics module
Mixer extension kit EM-M1 for one heating circuit with mixer, wall mounting
Mixer extension kit EM-MX for one heating circuit with mixer, mixer mounting
Mixer extension kit EM-MX for one heating circuit with mixer, mixer mounting,
Divicon heating circuit distributor
Mixer extension kit
5838001 GB 12/2018 Please keep safe.

2
Please follow these safety instructions closely to
prevent accidents and material losses.
Safety instructions explained
Danger
This symbol warns against the risk of injury.
!Please note
This symbol warns against the risk of material
losses and environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These instructions are exclusively intended for quali-
fied contractors.
■Work on gas installations may only be carried out by
a registered gas fitter.
■Work on electrical equipment may only be carried
out by a qualified electrician.
■The system must be commissioned by the system
installer or a qualified person authorised by the
installer.
Regulations to be observed
■National installation regulations
■Statutory regulations for the prevention of accidents
■Statutory regulations for environmental protection
■Codes of practice of the relevant trade associations
■Relevant country-specific safety regulations
Safety instructions for working on the system
Working on the system
■Where gas is used as the fuel, close the main gas
shut-off valve and safeguard it against unintentional
reopening.
■Isolate the system from the power supply, e.g. by
removing the separate fuse or by means of a mains
isolator, and check that it is no longer live.
■Safeguard the system against reconnection.
■Wear suitable personal protective equipment when
carrying out any work.
Danger
Hot surfaces and fluids can lead to burns or
scalding.
■Before maintenance and service work, switch
OFF the appliance and let it cool down.
■Never touch hot surfaces on the boiler, burner,
flue system or pipework.
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.
Repair work
!Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
Replace faulty components only with genuine
Viessmann spare parts.
Auxiliary components, spare and wearing parts
!Please note
Spare and wearing parts that have not been tes-
ted together with the system can compromise its
function. Installing non-authorised components
and making non-approved modifications or con-
versions can compromise safety and may inva-
lidate our warranty.
For replacements, use only original spare parts
supplied or approved by Viessmann.
Safety instructions
Safety instructions
5838001

3
Safety instructions for operating the system
If you smell gas
Danger
Escaping gas can lead to explosions which may
result in serious injury.
■Do not smoke. Prevent naked flames and
sparks. Never switch lights or electrical appli-
ances on or off.
■Close the gas shut-off valve.
■Open windows and doors.
■Evacuate any people from the danger zone.
■Notify your gas or electricity supply utility from
outside the building.
■Have the power supply to the building shut off
from a safe place (outside the building).
If you smell flue gas
Danger
Flue gas can lead to life threatening poisoning.
■Shut down the heating system.
■Ventilate the installation site.
■Close doors to living spaces to prevent flue
gases from spreading.
What to do if water escapes from the appliance
Danger
If water escapes from the appliance there is a
risk of electrocution.
Switch OFF the heating system at the external
isolator (e.g. fuse box, domestic distribution
board).
Danger
If water escapes from the appliance there is a
risk of scalding.
Never touch hot heating water.
Condensate
Danger
Contact with condensate can be harmful to
health.
Never let condensate touch your skin or eyes
and do not swallow it.
Flue systems and combustion air
Ensure that flue systems are clear and cannot be
sealed, for instance due to accumulation of conden-
sate or other external causes.
Ensure an adequate supply of combustion air.
Inform system users that subsequent modifications to
the building characteristics are not permissible (e.g.
cable/pipework routing, cladding or partitions).
Danger
Leaking or blocked flue systems, or an inade-
quate supply of combustion air can cause life
threatening poisoning from carbon monoxide in
the flue gas.
Ensure the flue system is in good working order.
Vents for supplying combustion air must be non-
sealable.
Extractors
Operating appliances that exhaust air to the outside
(extractor hoods, extractors, air conditioning units, etc.)
can create negative pressure. If the boiler is operated
at the same time, this can lead to a reverse flow of flue
gas.
Danger
The simultaneous operation of the boiler and
appliances that exhausts air to the outside can
result in life threatening poisoning due to a
reverse flow of flue gas.
Fit an interlock circuit or take suitable steps to
ensure an adequate supply of combustion air.
Safety instructions
Safety instructions (cont.)
5838001

4
1. Information Disposal of packaging ............................................................................ 5
Symbols ................................................................................................. 5
System examples .................................................................................. 5
2. Installation sequence Mounting the mixer extension kit ........................................................... 6
■Mixer mounting ................................................................................... 6
■Wall mounting ..................................................................................... 6
Mounting the temperature sensor .......................................................... 7
■Installing the flow temperature sensor (contact temperature sensor) . 7
■Installing the flow temperature sensor on the Divicon heating circuit
distributor ............................................................................................ 7
Overview of electrical connections ........................................................ 8
Connecting the flow temperature sensor ............................................... 8
Connecting the temperature sensor of the low loss header (if installed) 8
Connecting the mixer motor ................................................................... 8
■Mixer motor ......................................................................................... 9
■Mixer motors without plug or on-site mixer motors ............................. 9
Connecting the heating circuit pump ..................................................... 10
■Heating circuit pump 230 V~ .............................................................. 10
■Heating circuit pump 400 V~ .............................................................. 11
■Pumps in the underfloor heating circuit (in case of system separa-
tion) ..................................................................................................... 12
■Temperature limiter for maximum temperature limiter (accessories) .. 12
Rotary switch S1 for subscriber number addressing ............................. 13
Connecting the PlusBus to the heat generator ...................................... 13
Power supply ......................................................................................... 14
■Power supply at heat generator .......................................................... 14
■Separate power supply ....................................................................... 14
Connecting several accessories ............................................................ 16
■Power supply and PlusBus connection .............................................. 16
Commissioning ...................................................................................... 16
■Rotational direction of the mixer motor ............................................... 17
3. Parts lists Parts list ................................................................................................. 18
■Wall mounting ..................................................................................... 19
■Mixer mounting ................................................................................... 21
4. Specification Specification .......................................................................................... 23
Connection and wiring diagram ............................................................. 24
5. Declaration of Conformity Declaration of conformity ....................................................................... 25
6. Keyword index ................................................................................................................ 26
Index
Index
5838001

5
Please dispose of packaging waste in line with statu-
tory regulations.
Symbols
Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
System examples
For available system examples, see www.viessmann-
schemes.com
Information
Disposal of packaging
5838001
Information

6
Mixer mounting
M6
M8
M8
M6
M8
M6
3x
M8
M6
3x
3.
M6/M8
2.
1.
4.
Fig. 1
Wall mounting
2.
1.
Fig. 2
Installation sequence
Mounting the mixer extension kit
5838001
Installation

7
Installing the flow temperature sensor (contact temperature sensor)
■Fit the flow temperature sensor to the heating flow
pipe immediately downstream of the heating circuit
pump in the flow direction.
■With plastic pipes, mount the sensor against an inter-
mediate metal pipe section.
■Clean the contact area on the pipe down to bare
metal.
■Heat conducting paste is not required.
■Do not thermally insulate the temperature sensor.
1.
2.
4.
3.
100
Fig. 3
Installing the flow temperature sensor on the Divicon heating circuit distributor
Installation instructions for Divicon heating cir-
cuit distributor
Installation sequence
Mounting the temperature sensor
5838001
Installation

8
L?N
?N
jF jF [{] fÖ
M
1~ 230 V~/50 Hz
M
1~
L?NL
?
N
gS sÖ
[{] [{] [{] [{{]
?
)
S1
Fig. 4
Plug 230 V~
P1 sÖ Heating circuit pump (on site)
P3 gS Mixer motor
fÖ Power supply
fÖAPower supply for accessories
LV connections
PWM1 No function
S1 Rotary switch for subscriber number address-
ing
TS1 ?Flow temperature sensor
TS2 No function
TS3 )Temperature sensor, low loss header
jF PlusBus
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.
Note
Apply strain relief to on-site cables.
Seal any unnecessary apertures with cable grommets
(not cut open).
Connecting the flow temperature sensor
Insert plug ? at slot TS1 (see diagram 4).
Connecting the temperature sensor of the low loss header (if installed)
Insert plug ) at slot TS3 (see diagram 4).
Connecting the mixer motor
Only in conjunction with extension kit for wall mounting
Installation sequence
Overview of electrical connections
5838001
Installation

9
Mixer motor
A
23
1
gS
Fig. 5
APlug on mixer motor
gS Plug on mixer extension kit
|Mixer open
~Mixer close
Connect the mixer motor in accordance with the dia-
gram in the wall mounting base of the extension kit.
Never interchange wires.
Mixer motors without plug or on-site mixer motors
M
1~ A
gS
Fig. 6
AMixer motor
gS Plug on mixer extension kit
|Mixer open
~Mixer close
Connect the mixer motor in accordance with the dia-
gram in the wall mounting base of the extension kit.
Never interchange wires.
The mixer motor must meet the following criteria:
Rated voltage 230 V∼
Rated breaking capacity of the
relay output
0.1 A
Runtime for 90º∢120 s
Rotational direction Can be changed
Installation sequence
Connecting the mixer motor (cont.)
5838001
Installation

10
Note
In underfloor heating circuits, install a temperature lim-
iter on site to restrict the maximum temperature of the
underfloor heating system.
Heating circuit pump 230 V~
B
A
1~
M
Fig. 7
AHeating circuit pump
BPlug sÖ on the mixer extension kit
Specification
Rated current 1 A
Recommended connecting
cable
H05VV-F3G 0.75 mm2
or
H05RN-F3G 0.75 mm2
Heating circuit pump with power consumption greater than 1 A or high efficiency circulation pumps with
high starting currents
Pumps with switching input
LN
External
ON/OFF
LN
N PE
NL
L
D
C
A
B
Fig. 8
AHeating circuit pump
BPlug sÖ on the mixer extension kit
CContactor
DSeparate power supply (observe manufacturer's
instructions)
Specification for switching the contactor:
Rated voltage 230 V∼
Rated current 1 A
Recommended connecting
cable
H05VV-F3G 0.75 mm2
or
H05RN-F3G 0.75 mm2
Installation sequence
Connecting the heating circuit pump
5838001
Installation

11
Pumps without switching input
LN
LN
N PE
NL
L
D
C
A
B
Fig. 9
AHeating circuit pump
BPlug sÖ on the mixer extension kit
CContactor
DSeparate power supply (observe manufacturer's
instructions)
Specification for switching the contactor:
Rated voltage 230 V∼
Rated current 1 A
Recommended connecting
cable
H05VV-F3G 0.75 mm2
or
H05RN-F3G 0.75 mm2
Heating circuit pump 400 V~
LN L1 L2 L3 N PE
A
C
3~
M
B
Fig. 10
AHeating circuit pump
BPlug sÖ on the mixer extension kit
CContactor
Specification for switching the contactor:
Rated voltage 230 V∼
Rated current 1 A
Recommended connecting
cable
H05VV-F3G 0.75 mm2
or
H05RN-F3G 0.75 mm2
Installation sequence
Connecting the heating circuit pump (cont.)
5838001
Installation

12
Pumps in the underfloor heating circuit (in case of system separation)
1~
M1~ M
20
LN
ABC
sÖ
Fig. 11
sÖ Plug on mixer extension kit
APrimary heating circuit pump
BTemperature limiter
CSecondary heating circuit pump
(for system separation)
The common power consumption of both pumps must
not exceed 1 A.
Temperature limiter for maximum temperature limiter (accessories)
L N?
1~
M
L N?
C
B
A
Fig. 12
AHeating circuit pump
BTemperature limiter
CPlug sÖ on the mixer extension kit
Electromechanical temperature limiter using the liquid
expansion principle
■Switches the heating circuit pump off when the set
value has been exceeded.
■The flow temperature is only slowly reduced in this
situation. It may take several hours before the sys-
tem restarts again automatically.
■Connection: Screw terminals for 1.5 mm2
Specification
Setting range 30 to 80 °C
Switching differential
■Immersion thermostat Max. 11 K
■Contact thermostat Max. 14 K
Installation sequence
Connecting the heating circuit pump (cont.)
5838001
Installation

13
Fig. 13
Note
The rotary switch can be found on the PCB of the elec-
tronics module.
Set rotary switch S1.
System with one heating circuit with mixer:
■Heating circuit 2 with mixer: Rotary switch on exten-
sion kit to 1
■EM-P1 extension (heating circuit 1 without mixer):
Rotary switch to 2
System with several heating circuits with mixer:
■Heating circuit 2 with mixer: Rotary switch on exten-
sion kit to 1
■Heating circuit 3 with mixer: Rotary switch on exten-
sion kit to 2
■Heating circuit 4 with mixer: Rotary switch on exten-
sion kit to 3
■EM-P1 extension (heating circuit 1 without mixer):
Rotary switch to 4
Connecting the PlusBus to the heat generator
B
74
1 2
A
jF jF
1234
Fig. 14
AExtension (electronics module)
BPlusBus to heat generator
Note
If making the connection to the heat generator with an
external plug for the bus connection, disconnect plug
jF and connect the wires directly.
Heat generator installation and service instruc-
tions
Installation sequence
Rotary switch S1 for subscriber number addressing
5838001
Installation

14
Power supply at heat generator
L?NL
?
N
156
LN
A
Fig. 15
AExtension (electronics module)
fÖ Power supply
fÖAPower supply for further accessories
aBH Plug for heat generator accessories power supply
Create the power supply connection.
Route the power cable to the heat generator and con-
nect to plug aBH. Observe MCB/fuse protection, out-
put, plug aBH of the heat generator.
If power is supplied to a further accessory, use
plug fÖA provided
Heat generator installation and service instruc-
tions
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
Separate power supply
If the power supply for the extension is not made at
the heat generator.
Danger
Incorrect electrical installations can lead to seri-
ous injury from electrical current and result in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■IEC 60364-4-41
■VDE regulations
■TAR medium voltage VDE-AR-N-4110
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Isolators for non-earthed conductors
■The mains isolator (if installed) must simultaneously
isolate all non-earthed conductors from the mains
with a minimum contact separation of 3 mm.
■If no mains isolator is installed, all non-earthed con-
ductors must be isolated from the power supply by
the upstream circuit breaker with a minimum contact
separation of 3 mm.
Installation sequence
Power supply
5838001
Installation

15
L1
B
FE
D
D
N
C
A
40
Fig. 16
APower supply, extension (electronics module)
BPower supply, heat generator
CPower supply 1/N/PE, 230 V/50 Hz
DFuse (max. 16 A)
EMains isolator, 2-pole, on site
FJunction box (on site)
Connect the power supply in accordance with the dia-
gram.
If the power supply to the appliance is connected with
a flexible cable, ensure that the live conductors are
pulled taut before the earth conductor in the event of
strain relief failure. The length of the earth conductor
wire will depend on the design.
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
!Please note
Incorrect phase sequence can cause damage to
the appliance.
Ensure phase equality with the heat generator
power supply.
Colour coding to IEC 60757
BN Brown
BU Blue
GNYE Green/yellow
Installation sequence
Power supply (cont.)
5838001
Installation

16
Power supply and PlusBus connection
Power supply to all accessories via heat generator control unit
74 74 40A 40 74 74 40A 40
B C
74 40 96/156
A
74 74 40A 40
D
E
Fig. 17
Some accessories with direct power supply
74 74 40A 40 74 74 40A 40
B C
74 40 96/156
A
74 74 40A 40
D
E
Fig. 18
AHeat generator control unit
BMixer extension kit for heating circuit with
mixer M2 (ADIO electronics module)
CMixer extension kit for heating circuit with
mixer M3 (ADIO electronics module)
DFurther accessories
EON/OFF switch
fÖ (A) Power supply
jF PlusBus
lH/aBH Accessories power supply in the control unit of
the heat generator
■In the following circumstances, use the output for the
accessories only to switch an on-site relay:
An actuator (e.g. circulation pump) with a higher
power demand than the fuse rating required for the
accessories is connected at the accessories output.
■In the following circumstances, connect one or more
accessories directly to the mains supply via an
ON/OFF switch:
The max. permissible total current of the control unit
for the heat generator is exceeded.
Note
In this event, the accessories concerned cannot be
isolated with the ON/OFF switch on the control unit.
Commissioning
Heat generator installation and service instruc-
tions
Installation sequence
Connecting several accessories
5838001
Installation

17
Rotational direction of the mixer motor
Checking the rotational direction of the mixer motor
After being switched on, the appliance implements a
self-test. During this, the mixer is opened and closed
again.
Observe the rotational direction of the mixer motor dur-
ing its self-test.
Then manually set the mixer to "OPEN".
Note
The flow temperature must now rise. If the temperature
drops, either the motor is turning in the wrong direction
or the mixer insert is incorrectly fitted.
Mixer installation instructions
Changing the rotational direction of the mixer motor (if required)
gS
BU
|
~
Fig. 19
1. Remove the top casing cover of the mixer exten-
sion kit.
Danger
An electric shock can be life threatening.
Switch OFF the power supply before open-
ing the appliance. For example, remove the
fuse or switch off a mains isolator.
2. At plug gS, swap the cores at terminals " " and " ".
3. Refit the casing cover.
Installation sequence
Commissioning (cont.)
5838001
Installation

18
The following details are required when ordering parts:
■Serial no. (see type plate)
■Position number of the part
Parts lists
Parts list
5838001
Service

19
Wall mounting
0006 0013
0002 0004 0005
0015
0001
0014
Fig. 20
Parts lists
Parts list (cont.)
5838001
Service

20
Pos. Part
0001 ADIO electronics module
0002 Flow temperature sensor NTC
0004 Connecting cable fÖ
0005 PlusBus cable
0006 Plug set
0013 Strain relief
0014 Fuse 2.0 A (slow), 250 V~ (10 pce)
0015 Installation and service instructions
Parts lists
Parts list (cont.)
5838001
Service