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
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1
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