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 authorised contractors.
■ Work on gas installations must only
be carried out by a registered gas fitter.
■ Work on electrical equipment must
only be carried out by a qualified
electrician.
Regulations to be observed
■ Codes of practice of the relevant
trade associations
■ All current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards
ÖNORM, EN, ÖVGW-TR Gas,
a
ÖVGW-TRF and ÖVE
SEV, SUVA, SVGW, SVTI,
c
SWKI, VKF and EKAS guideline
1942: LPG, part 2
Working on the system
■ 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.
■ Where gas is used as the fuel, close
the main gas shut-off valve and safeguard it against unintentional reopening.
■ National installation regulations
■ Statutory regulations for the prevention of accidents
■ Statutory regulations for environmental protection
2
5443 825 GB
Page 3
Index
Preparing for installation...................................................................................4
Installation sequence
Fitting to boiler with pipe assembly (accessories)................................................5
Declaration of Conformity................................................................................. 36
5443 825 GB
3
Page 4
3.
2.
4.
1.
Preparing for installation
Removing the thermal insulation
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4
Page 5
4.
3.
1.
A
B
2.
Fitting to boiler with pipe assembly (accessories)
Heating flow
A
Heating return
B
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5
Page 6
1.
2.
Ø 10
Wall mounting
Fitting a single module (without manifold)
5443 825 GB
6
Page 7
1.
2.
A
B
Wall mounting
(cont.)
A
5443 825 GB
Heating flow
Heating return
B
7
Page 8
Ø 10
300
500
2.
1.
Wall mounting
(cont.)
Fitting several modules with manifold (accessories)
Manifold for 2 Divicons
A
Manifold for 3 Divicons
B
8
5443 825 GB
Page 9
70
142
2.
1.
A
B
A
B
A
B
Wall mounting
(cont.)
Manifold (H = 70 mm) for two Divicons
A
5443 825 GB
Heating flow
Heating return
B
9
Page 10
2.
1.
A
B
A
B
A
B
100
167
Wall mounting
(cont.)
Manifold (H = 100 mm) for two Divicons
A
10
Heating flow
Heating return
B
5443 825 GB
Page 11
2.
1.
A
B
A
B
A
B
A
B
70
142
Wall mounting
(cont.)
Manifold (H = 70 mm) for three Divicons
A
5443 825 GB
Heating flow
Heating return
B
11
Page 12
2.
1.
A
A
B
A
B
A
B
B
100
167
Wall mounting
(cont.)
Manifold (H = 100 mm) for three Divicons
Heating flow
A
12
Heating return
B
5443 825 GB
Page 13
Wall mounting
(cont.)
5443 825 GB
13
Page 14
1.
3.
4.
2.
Wall mounting
(cont.)
Low loss header (if supplied)
A
14
Heating flow
Heating return
B
5443 825 GB
Page 15
1.
2.
Filling the system
1. For filling (with heating water), open
the check valve in the heating
return by positioning the slot of the
screw in the vertical position.
Note
Observe the marking on the adjusting screw.
5443 825 GB
2. For operation, position the slot of
the screw in the horizontal position.
15
Page 16
1.
3.
2.
Fitting the thermal insulation
Low loss header (if supplied)
16
5443 825 GB
Page 17
1.
2.
Fitting the thermal insulation
Manifold
(cont.)
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17
Page 18
1.2.3.
A
B
3.
2.
3.
2.
1.
Fitting the thermal insulation
Divicon with mixer
Note
With several Divicons, first fit the thermal insulation on the right Divicon. For
the remaining Divicons, fit the insulation
from right to left.
(cont.)
Cut if fitting a single module to the
A
wall
18
Cut out the thermal insulation if
B
connecting with a union nut
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Page 19
2.
3.
1.
Fitting the thermal insulation
(cont.)
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19
Page 20
B
1.2.3.
1.
2.
2.
A
Fitting the thermal insulation
Divicon without mixer
Note
With several Divicons, first fit the thermal insulation on the right Divicon. For
the remaining Divicons, fit the insulation
from right to left.
(cont.)
Cut if fitting a single module to the
A
wall
20
Cut out the thermal insulation if
B
connecting with a union nut
5443 825 GB
Page 21
2.
3.
1.
4.
Fitting the thermal insulation
(cont.)
5443 825 GB
21
Page 22
52
20
40A
40
20
40A
40
2
145
145
17
S1F1
Extension kit with mixer PCB
Note
Bundle the power cables below the
extension kit and secure with cable ties.
Overview of electrical connections
F1 Fuse, 2A (slow)
S1 Rotary selector
230 V~ plugs
Heating circuit pump
sÖ
Power supply 230 V/50 Hz
fÖ
Power supply connection of
fÖA
accessories
Mixer motor
gS
22
Low voltage connections
?
aJ
aVG
Flow temperature sensor
Return temperature sensor (in
conjunction with the Vitotronic
300, type KW3, if installed)
KM BUS cable
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Page 23
A
aVG
fÖ
2
3
4
5
6
1
0
9
8
7
S1
145
40
96
145
1 2
1 2
B
156
N L
N
L
N L
1
Extension kit with mixer PCB
Please note
Electronic modules can be dam-
!
aged by electrostatic charges.
Before beginning work, touch
(cont.)
Note
Apply a strain relief to all on-site cables.
Close any unnecessary knockouts with
cable grommets (not cut open).
earthed objects, such as heating
or water pipes, to discharge
static loads.
Connecting the extension kit to the control unit
Connecting the Vitotronic 300, type
KW3
Danger
Incorrect core assignment can
result in serious injury and damage to the appliance.
Take care not to interchange
wires "L1" and "N".
KM-BUS to the control unit or to
aVG
the KM-BUS distributor (accessories)
Power supply via control unit or
aBH
via power distributor (accessories)
A
B
Extension kit
To the control unit
S1 For rotary selector position, see the
following table
5443 825 GB
23
Page 24
Extension kit with mixer PCB
(cont.)
Set rotary selector:
Heating circuit affected by
Sensors connectedRotary selector S1
the mixer
Heating circuit with mixer M2Flow temperature sensor"2"
(delivered condition)
Flow temperature sensor and
"3"
return temperature sensor
Heating circuit with mixer M3Flow temperature sensor"4"
Flow temperature sensor and
"5"
return temperature sensor
Wall mounted and storage combi
boilers
Danger
Incorrect core assignment can
result in serious injury and damage to the appliance.
Take care not to interchange
wires "L1" and "N".
24
5443 825 GB
Page 25
A
X3100962035
B
aVG
fÖ
145
40
1 2
N L
76 54 321
N L1
S1
2
3
4
5
6
1
0
9
8
7
Extension kit with mixer PCB
Extension kit
A
Power supply
fÖ
KM-BUS
aVG
S1For rotary selector position,
see the following table
Control unit
B
"X3" KM-BUS at terminals "7" and
"6" (disconnect plug
or
with plug
aVG
distributor (accessories)
Power supply
lH
to the KM-BUS
aVG
)
(cont.)
Set rotary selector:
Heating circuit which should be influenced
by the mixer
Heating circuit with mixer M2"2" (delivered condition)
Heating circuit with mixer M3"4"
5443 825 GB
Note
If the mains power supply
has already been allocated,
see chapter "Power supply".
Rotary selector S1
25
Page 26
2035100
32 15 4
X3
28
X14
A
aVG
fÖ
145
40
1 2
N L
S1
2
3
4
5
6
1
0
9
8
7
2 1
N?L1
B
96
145
Extension kit with mixer PCB
Extension kit
A
Power supply
fÖ
KM-BUS
aVG
S1For rotary selector position,
see the following table
Control unit
B
"X14" KM-BUS at terminals "1"
and "2" (disconnect plug
)
aVG
or
with plug
BUS distributor (accessories)
Power supply
lH
Note
If the mains power supply
has already been allocated,
see chapter "Power supply".
to the KM-
aVG
(cont.)
26
5443 825 GB
Page 27
145
145
40A
40
145
145
40A
40
AB
D
F
CE
Extension kit with mixer PCB
Set rotary selector:
Heating circuit which should be influenced
by the mixer
Heating circuit with mixer M2"2" (delivered condition)
Heating circuit with mixer M3"4"
(cont.)
Rotary selector S1
Connecting two extension kits
Extension kit for a heating circuit
A
with mixer M2
Extension kit for heating circuit with
B
mixer M3
KM BUS cable (standard delivery)
C
to the control unit
KM BUS cable, 0.8 m long (cable
D
kit accessory, part no. 7424 960)
Power supply (connect the power
E
cable supplied, see the following
chapter)
F Power cable with plug fÖ and fÖA
(cable kit accessory, part no. 7424
960)
Power supply
Connect accessories with a total wattage above 400 Wdirectly to the
mains power supply.
5443 825 GB
Danger
Incorrectly executed electrical
installations can result in injuries
from electrical current and damage to the appliance.
Connect the power supply and
implement all safety measures
(e.g. RCD circuit) in accordance
with the following regulations:
■ IEC 60364-4-41
■ VDE regulations
27
Page 28
Extension kit with mixer PCB
■ Connection requirements
specified by the local power
supply utility
■ Protect the power cable with a
fuse/MCB of up to 16 A.
Danger
The absence of component
earthing for the system 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.
(cont.)
■ The mains isolator (if installed) must
simultaneously isolate all nonearthed conductors from the mains
with a minimum contact separation of
3 mm.
■ If no mains isolator is installed, all
non-earthed conductors must be isolated from the power supply by the
upstream circuit breaker with a minimum contact separation of 3 mm.
■ In addition, we recommend installing
an AC/DC-sensitive RCD (RCD class
B ) for DC (fault) currents that
can occur with energy efficient equipment.
28
5443 825 GB
Page 29
C
D
E
F
L1
N
BA
4040
Extension kit with mixer PCB
Extension kit power supply
A
Control unit power supply
B
Power supply 230 V/50 Hz
C
Fuse (max. 16 A)
D
Mains isolator, 2-pole, on site (if
E
installed)
Terminal box (on site)
F
(cont.)
Make the power supply connection in
accordance with the diagram.
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
control unit power supply.
Colour coding to IEC 60757
BNBrown
BUBlue
GN/YE Green/yellow
5443 825 GB
29
Page 30
Extension kit with mixer PCB
Connection and wiring diagram
(cont.)
A1 Main PCB
F1 Fuse
Plug 230 V~
Heating circuit pump
sÖ
Power supply 230 V/50 Hz
fÖ
Power supply connection of
fÖA
accessories
Mixer motor
gS
30
S1 Rotary selector
5443 825 GB
Page 31
gS
BU
|
~
Extension kit with mixer PCB
(cont.)
Low voltage plugs
Flow temperature sensor
?
Return temperature sensor (in
aJ
conjunction with the Vitotronic
300, type KW3, if installed)
KM BUS cable for connection with
aVG
the control unit and an additional
extension kit
Changing the rotational direction (if required)
1. Danger
An electric shock can be life
threatening.
Before opening the boiler,
disconnect it from the mains
voltage, e.g. at the fuse or
mains isolator.
Remove the casing cover (see
chapter "Overview of electrical connections").
2.
Switch cores BK and BK on
plug gS.
3. Refit the casing cover.
4. Check the rotational direction.
Specification
Flow temperature sensor
Sensor typeViessmann cylinder temperature sensor (NTC)
IP ratingIP 53 to EN 60 529; ensure through design/installa-
tion
Permissible ambient temperature
■ During operation−20 to +90 °C
■ During storage and trans-
port
5443 825 GB
–20 to +70 °C
31
Page 32
0.1
1
10
100
020406080100
Temperature in °C
Resistance in kΩ
25
Extension kit with mixer PCB
(cont.)
Curve
Mixer motor
Rated voltage230 V~
Rated frequency50 Hz
Rated current2 A
Power consumption5.5 W
Protection classI
IP ratingIP 32 D to EN 60 529, ensure through design/instal-
lation
Permissible ambient temperature
■ During operation0 to +40 °C
■ During storage and trans-
–20 to +65 °C
port
Rated relay output breaking
capacity
■ Heating circuit pump2 (1) A 230 V~
■ Mixer motor0.2 (0.1) A 230 V~
32
5443 825 GB
Page 33
3.
2.
3
2
1
N
|
~
A
4.
Extension kit without mixer PCB
Note
Bundle the power cables below the
extension kit and secure with cable ties.
Connecting the extension kit to the control unit
Connecting the flow temperature
Connecting the mixer motor
sensor
Push cable plug gS into the corre-
Push sensor plug ? into the corre-
sponding socket of the control unit.
sponding socket of the control unit.
Installation and service instruc-
Installation and service instruc-
tions of the relevant control unit
tions of the relevant control unit
Changing the rotational direction (if required)
1. Switch OFF the power supply to the
control unit.
2. Remove the enclosure lid.
3.
Pull out 3-pin plug A in the mixer
motor.
5443 825 GB
4.
Insert 3-pin plug A in the mixer
motor rotated through 180°.
5. Check the rotational direction.
33
Page 34
020406080 100
540
560
580
600
620
640
660
680
700
720
Resistance in Ω
740
Flow temperature in °C
Extension kit without mixer PCB
(cont.)
Specification
Flow temperature sensor
Sensor typeViessmann Ni500
IP ratingIP 32 to EN 60 529; ensure through de-
sign/installation
Permissible ambient temperature
■ during operation0 to +120 °C
■ during storage and transport–20 to +70 °C
Curve
34
5443 825 GB
Page 35
Extension kit without mixer PCB
(cont.)
Mixer motor
Rated voltage230 V~
Rated frequency50 Hz
Rated current2 A
Power consumption4 W
Protection classI
IP ratingIP 42 to EN 60 529; ensure through de-
sign/installation
Permissible ambient temperature
■ during operation0 to +40 °C
■ during storage and transport–20 to +65 °C
Rated capacity of the relay outputs
■ Heating circuit pump4 (2) A 230 V~
■ Mixer motor0.2 (0.1) A 230 V~
5443 825 GB
35
Page 36
Declaration of Conformity
Mixer extension kit
We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, declare as sole
responsible body that the named product complies with the provisions of the following directives and regulations:
2014/30/EUEMC Directive
2014/35/EULow Voltage Directive
2006/42/EECMachinery Directive
Applied standards
EN 55014-1: 2006 + A1:2009 + A2:2011
EN 55014-2: 2015
EN 60335-1: 2012 / AC:2014
EN 60335-2-102: 2006 + A1:2010
In accordance with the listed directives, this product is designated with .
Allendorf, 31/08/2016Viessmann Werke GmbH & Co. KG
Authorised signatory Manfred Sommer
Viessmann Werke GmbH & Co. KG
D-35107 Allendorf
Telephone: +49 6452 70-0
Fax: +49 6452 70-2780
www.viessmann.com