Viessmann VITOTRONIC 100, HC1, VITOTRONIC 300-K, MW2S, VITOCONTROL-S Installation And Service Instructions Manual

Installation and
Service Instructions

for use by heating contractor

V

itotronic 100, Model HC1

Digital boiler control unit

Vitotronic 300-K, MW2S

Outdoor-reset logic digital cascade control
Panel mount, controls up to 4 Vitodens WB2B boilers

Please file in Service Binder

VITOTRONIC 100, HC1
VITOTRONIC 300-K, MW2S

Certified as a component part
of Viessmann boilers only

Vitotronic 100, HC1

Vitotronic 300-K, MW2S

5727 946 v1.2 11/2011

Safety, Installation and Warranty Requirements

5727946v1.2

Please ensure that this manual is read and understood before commencing installation. Failure to comply with the
instructions listed below and details printed in this manual can cause product/property damage, severe personal injury,
and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information found in manual
subsections).

Licensed professional heating
contractor

The installation, adjustment, service,
and maintenance of this equipment
must be performed by a licensed
professional heating contractor.

ease see section

Pl
entitled “Important
Regulatory and
Installation
Requirements.”

Product documentation

Read all applicable documentation be­fore commencing installation. Store
documentation near boiler in a readily
accessible location for reference in the
future by service personnel.

For a listing of
applicable literature,
please see section
entitled “Important
Regulatory and
Installation Requirements.”

Advice to owner

Once the installation work is complete,
the heating contractor must familiarize
the system operator/ultimate owner
with all equipment, as well as safety
precautions/requirements, shut-down
procedure, and the need for
professional service annually before
the heating season begins.

Warranty

Information contained in
this and related product
documentation must be
read and followed. Failure

to do so renders warranty
null and void.

2

Index

Table of Contents

Page

Safety, Installation and Warranty Requirements 2

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General Information

Important Regulatory and Safety Requirements 5
About these Instructions 6

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Heating System Designs

System design 7

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Installation – Vitotronic 300-K

Installing the Cascade Communication Module 10
Summary of electrical connections (Power Pump Module) 11
Installing modules 13
Installing the programming unit 13
Summary of electrical connections 14
Sensor connection 17
Connection of the pumps 19

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Connection to modulating valve actuators 20
Connection of external contacts 21
Connection to compiled failure alarm 22
Making the LON connection 23
Power supply 24

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Initial Start-up

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Steps 25
Further step-by-step instructions 26

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Service Scanning – Vitotronic 100, HC1

Service level summary 36
Temperatures, boiler coding card and quick scans 37
Scanning operating conditions 38
Scanning and resetting service displays 39

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Service Scanning – Vitotronic 300-K

Service level summary 40
Temperatures and quick scans 41
Scanning operating conditions 43

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Troubleshooting – Vitotronic 100, HC1

Retrieving fault codes from the fault memory (fault history) 44
Faults displayed at the programming unit 44

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Troubleshooting – Vitotronic 300-K

Retrieving fault codes from the fault memory (fault history) 48
Faults with fault display at the programming unit 48

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Function Description – Vitotronic 100, HC1

Boiler temperature control 54

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5727 946 v1.2

3

Table of Contents

5727946v1.2

Index (continued)

Function Description – Vitotronic 300-K

Cascade control unit 55
Heating circuit control 60
DHW tank temperature control 63

Components – Vitotronic 300-K

Components from the parts list 65
Mixing valve circuit extension kit 69
Installation examples 70
Remote control 71
Room temperature sensor 77
Input Module 0 to 10 V 78

Coding – Vitotronic 100, HC1

Resetting codes to the factory setting 79
Coding Level 1 79
Coding Level 2 80

Coding – Vitotronic 300-K

Resetting codings to the factory setting 82
Coding Level 1 82
Coding Level 2 85
Slab curing function diagram 101

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Connection and Wiring Diagrams - Vitotronic 100, HC1

Boiler control, Power Pump Module (models 45, 60) wiring diagram 102
Boiler control, Power Pump Module (models 80, 105) wiring diagram 104

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Appendix

Specification – Vitotronic 100 106
Specification – Vitotronic 300-K 106
Parts list 107

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Product Information

Vitotronic 100, HC1, and Vitotronic 300-K

Only for integration/installation on Viessmann boilers and for wall mounting.

These application examples are only recommendations, and must therefore be checked on site for completeness and
function.

4

Important Regulatory and Safety Requirements

5727946v1.2

General Information

Approvals

Viessmann boilers, burners and
controls are approved for sale in North
America by CSA International.

Codes

The installation of this unit shall be in
accordance with local codes. In the
absence of local codes, use:
CSA C22.1 Part 1 and/or local codes

in Canada

National Electrical Code ANSI/NFPA

70 in the U.S.

Always use latest editions of codes.

Working on the equipment

The installation, adjustment, service,
and maintenance of this product must
be done by a licensed professional
heating contractor who is qualified and
experienced in the installation, service,
and maintenance of hot water boilers.

There are no user serviceable parts on
the boiler, burner, or control.

Please carefully read this manual prior
to attempting installation. Any
warranty is null and void if these
instructions are not followed.

For information regarding other
Viessmann System Technology
componentry, please reference
documentation of the respective
product.

We offer frequent installation and
service seminars to familiarize our
partners with our products. Please
inquire.

The completeness and functionality of
field supplied electrical controls and
components must be verified by the
heating contractor. These include low
water cut-offs, flow switches (if used),
staging controls, pumps, motorized
valves, air vents, thermostats, etc.

Ensure main power supply to
equipment, the heating system, and all
external controls has been deactivated.
Close main oil or gas supply valve.
Take precautions in both instances to
avoid accidental activation of power
during service work.

Technical literature

Literature applicable to all aspects of
the Vitotronic 300-K:

- Installation & Service Instructions

- Operating & User Instructions

- Instructions of other Viessmann
products utilized and installed

- Installation codes mentioned
in this manual

WARNING

Turn off electric power
supply before servicing.
Contact with live
electric components
can cause shock or loss
of life.

Leave all literature at the installation
site and advise the system operator/
ultimate owner where the literature
can be found. Contact Viessmann for
additional copies.

5

General Information

5727946v1.2

Important Regulatory and Installation Requirements

Power supply

Install power supply in accordance with
the regulations of the authorities
having jurisdiction or, in the absence of
such requirements, in accordance with
National Codes. Viessmann
recommends the installation of a
disconnect switch to the 120 VAC
power supply outside of the boiler
room. The installer must provide
maximum 15 A overcurrent protection
for the 120 VAC power supply (fuse or
circuit breaker).

Working with an open control

No static discharge to the internal
componentry must ever occur when
working with opened control
equipment.

About these Installation Instructions

Take note of all symbols and notations intended to draw attention to potential hazards or important product information.
These include ”WARNING”, ”CAUTION”, and ”IMPORTANT”. See below.

Warnings draw your attention to the

WARNING

Indicates an imminently hazardous
situation which, if not avoided, could
result in death, serious injury or
substantial product/property damage.

presence of potential hazards or
important product information.

CAUTION

Indicates an imminently hazardous
situation which, if not avoided, may
result in minor injury or
product/property damage.

IMPORTANT

Cautions draw your attention to the
presence of potential hazards or
important product information.

Helpful hints for installation,
operation or maintenance which
pertain to the product.

This symbol indicates that additional,
pertinent information is to be found in
column three.

This symbol indicates that other
instructions must be referenced.

6

System design

5727946v1.2

Heating System Designs

A Vitodens 200-W (models 45 to

105) with the Vitotronic 100, HC1,
with KMK cascade communication
module as part of the standard
delivery

B Vitotronic 300-K with LON

communication module (accessory)

C DHW cylinder
D Vitotronic 200-H with LON

communication module
(accessories)

E Mixing valve on Vitotronic 300-K
F Mixing valve on Viotronic 200-H
G Maximum temperature controller

(underfloor heating)

H Low loss header
K Two-way valve

! Outdoor temperature sensor
? Supply temperature sensor

common heating flow
(low loss header)

?M1 Supply temperature sensor

mixing valve circuit 1 ­extended circuit
(Vitotronic 200-H)

?M2/M3Supply temperature sensor

mixing valve circuit 2 or 3
(Vitotronic 300-K)

% DHW temperature sensor
sÖ Boiler pump (Vitotronic 100,

HC1)

sÖM1 Mixing valve circuit 1

(Vitotronic 200-H)

sÖM2/M3Mixing valve circuit 2 or 3

(Vitocontrol-S)

sA DHW pump
sK DHW recirculation pump
fÖ Power supply, 120 V/60 Hz
gSM1 Motor mixing valve circuit 1

(Vitotronic 200-H)

gSM2/M3Motor mixing valve circuit 2

or 3 (Vitotronic 300-K)

aVD/aVH External hook-up

(Vitotronic 300-K),
see page 21.

aVG/KMK Connection to

Vitotronic 100, HC1 to
Vitotronic 300-K

KMK Interconnection between

boiler controls and Vitotronic
100, HC1

7

Heating System Designs

5727946v1.2

System design (continued)

The codes must be set on every Vitotronic 100.
(see section on coding page 82)

Vitotronic 100, HC1

Required coding

01 : 2

07 : 2
07 : 3
07 : 4

Vitotronic 300-K

Required coding

00 : 3,
00 : 4,
00 : 7,
or
00 : 8

35 : 1
35 : 2
35 : 3
35 : 4

Multi-boiler system with Vitocontrol-S, WB2B

Setting the boiler number at the Vitotronic 100 of the
second boiler
third boiler
fourth boiler

Heating circuit M2 without DHW heating
Heating circuit M2 with DHW heating
Heating circuit M2 and M3 without DHW heating

Heating circuit M2 and M3 with DHW heating

Setting up Vitotronic 300-K with
one Vitotronic 100
two Vitotronic 100
three Vitotronic 100
four Vitotronic 100

Vitotronic 200-H (if installed)

Required coding

97 : 1 The outdoor temperature is accepted by the LON BUS

8

System design (continued)

5727946v1.2

DHW and Space Heating
Multiple (up to four) Vitodens 200-W, models WB2B 45, 60, 80 and 105 with...

– multiple heating circuits with mixing valves
– low-loss header

Vitotronic 300-K

Heating System Designs

DHW Tank

TPV

PPM

Boiler 1 Boiler 2

PRV

PPM PPM PPM

Boiler 3 Boiler 4

PRV

PRV

PRV

Common

Supply
Temperature
Sensor

Low-Loss

ader

He

M

Fig. 31

When designing a multiple Vitodens system as shown above, please reference applicable multiple Vitodens technical
documentation, and contact your local Viessmann Sales Representative for further assistance.

M

IMPORTANT

This installation example depicts a
possible piping layout for multiple
Vitodens 200-W, WB2B boilers
equipped with Viessmann system
Technology. Please note that this
example is based on a simplified
conceptual drawing only! Piping and
necessary componentry must be field
verified.
A low water cut-off (LWCO) must be
installed where required by local codes.
Proper installation and functionality in
the field is the responsibility of the
heating contractor.

WARNING

When extending wire, there is the
possibility of exposure to
electromagnetic interference.
Avoid running wires beside or near
high voltage 120/240 VAC
conductors. If proximity to high
voltage conductors cannot be
avoided, use stranded, twisted pair
or shield design wire. Ensure that
only one end of the shielding is
grounded.

9

Installation – Vitotronic 300-K

Installing the Cascade Communication Module

A

The cascade communication module

2.

A

3.

Installation Instructions shipped
with boiler.

1.

X7

A

B

C

C

D

A Vitotronic 300-K
B KMK-BUS
C Boiler control with Vitotronic 100

and KMK Module (max 4 boilers)

D 2-core Cable

(cable cross-section 2 x 0.5 mm

2

20 AWG total length 164ft. / 50m)

E Connection to the Vitotronic 300-K

(to terminals X9.3 and X9.4 on
cascade electronic module A2)

F Terminal strip ”KMK1/KMK2” at

the cascade communication module
of the boiler control with
Vitotronic 100

X9

4

3

A2

KMK2KMK1 KMK2KMK1

Note:
The total length of BUS cables B
should not exceed 164ft. / 50m.
The wires from the BUS cables are
commutable.

1 2 3 41 2 3 4

5727 946 v1.2

10

Summary of electrical connections (Power Pump Module)

Power/Pump module

MAIN POWER SUPPLY

120V, 60HZ, 12A

L

N

G

MAIN
DISCONNECT

L2
L1
P1
P2

A

-TYPICAL

SAFETY DEVICE

LOW WATER CUT-OFF

SWITCH

120VAC
WALL
RECEPTACLE

120/230

Transformer

NL

202120A40

L2

L1 G N

40

202120A

M

120VAC

BOILER
PUMP

Installation – Vitotronic 300-K

Installation
Instructions,
Power Pump

31 2

143

NL

NLNLNL

50

50

120VAC

FAULT

ALARM

OUTPUT

1 2 3 1 2 3 1 2 3

28

L G N

144

31 2

31 2

145

145144143

Module

KMK1KMK2

X1

4321

KMK

Module

L

145

X
7

X
8

X
9

X11
LON

KMK

X4

Boiler Control Board

1234567

X3

20 40

N

230 VAC

40962035100

5727 946 v1.2

11

Installation – Vitotronic 300-K

Summary of electrical connections (Power Pump Module) (continued)

305

1.

318

2.

129

X10

139

4.

X2

X1

12

5727 946 v1.2

Installing modules

5727946v1.2

A4 A3

A1 A2

A1 Power supply module

2 Cascade electronic module

A
A3 Power module
A4 Extension module, mixing valves

Installing the programming unit

Installation – Vitotronic 300-K

1. Install the modules in accordance

with the layout indicated on DIN
rail inside the control panel.

2. Connect the modules in accordance

with the overview
on page 14 and 15, using the
connecting cables provided.

1. Make a cutout with the dimensions
305 × 129 mm in the front door of
the control panel.
When installing two programming
units, maintain a distance between
both of 20 mm.

2. Snap the frame into place.

3. Insert the programming unit.

4. Plug the connecting cable into the

back of the programming unit and
into the cascade electronic module
(A2).

13

Installation – Vitotronic 300-K

5727946v1.2

Summary of electrical connections

14

F1 4A

(slow)

Summary of electrical connections (continued)

5727946v1.2

Installation – Vitotronic 300-K

15

Installation – Vitotronic 300-K

5727946v1.2

Summary of electrical connections (continued)

A1 Power supply module

fÖ Power supply connection

A2 Cascade electronic module

! Outdoor temperature sensor

(accessories)

? Common supply temperature

sensor

% DHW tank temperature sensor

(accessories)

%B 2nd tank temperature sensor

(accessories)

aJA Temperature sensor T1
aJB Temperature sensor T2

or
temperature sensor - DHW tank
loading system

aVD External connections
aVG KM BUS users (accessories) link

to Vitotronic 100 and remote
controls Vitocontrol

aVH External connections
LON Connecting cable for data

transfer between the control
units

S1 Emissions test switch S

(optional)

A3 Power module

sÖA1 Heating circuit pump or

DHW tank loading system

sA DHW tank pump (accessories)
sK DHW re-circulation pump
sL Shunt or supply pump
gÖ Compiled failure alarm
gSA1 Three-way return elevation valve

A4 Expansion module

?M2/M3 Supply temperature sensor
sÖM2/M3 Heating circuit pump
gSM2/M3 Mixing valve actuator

A5 Programming unit

incl. connecting cable

*1

Remove both jumpers when connecting the emissions test circuit.

16

Sensor connection

Outdoor temperature sensor

Installation – Vitotronic 300-K

The outdoor temperature sensor should be mounted 6.5 to 8ft / 2 to 2.5m above
ground level on the north or north-west facing wall of the building. In the case of
multi-storey buildings, it should be mounted in the upper half of the second storey.
Make sure that the sensor is not located over windows, doors and air vents, nor
immediately beneath a balcony or guttering.
Do not paint over the outdoor temperature sensor housing.

1. Remove the cap.

2. Mount the bottom part of the sensor

housing.

1.

4.

2.

WARNING

When extending wire, there is the
possibility of exposure to
electromagnetic interference.
Avoid running wires beside or near
high voltage 120/240 VAC
conductors. If proximity to high
voltage conductors cannot be avoided,
use stranded, twisted pair or shield
design wire. Ensure that only one end
of the shielding is grounded.

5.

3.

3. Pull the sensor wire through the
opening in the terminal compartment
and through the strain relief
provided.

4. Connect the wires to the terminals.

5. Place the cap over the outdoor

temperature sensor.

600

580

560

540

520

500

480

460

440

5727 946 v1.2

420

Resistance in

400

-40 -30 -20 -10 0 10 20 30

-40 -22 -4 14 32 50 68 86

Outdoor temperature in °C / °F

17

Installation – Vitotronic 300-K

Sensor connection (continued)

DHW tank temperature sensor

The sensor measures the domestic hot
water tank temperature.

720

700

680

Heating systems with domestic hot
water heating (single-boiler systems
only)

1. Install the DHW tank temperature

sensor.

See installation instructions
for domestic hot water tank

Note:

When installing the sensor in DHW
tanks of other makes, make sure
that the sensor is pressed against
the sensor well of the DHW tank by
means of a suitable device.

2. Ensure that the maximum
permissible domestic hot water
temperature is not exceeded. If
necessary, install a suitable safety
device for this purpose.

Check the sensor

1. Disconnect wires from terminals

X2.7 and 2.1 of module A2.

2. Measure resistance of sensor at
terminals ”1” and ”2” of the plug.

DHW tank
temperature

Resistance
in ΩΩΩΩ

in °F / °C /

104 / 40
122 / 50
140 / 60

578
597
616

3. Compare the value measured with
the current temperature. If the value
differs significantly, check
installation and, if necessary, replace
sensor.

Technical data

Degree of protection: IP 32
Ambient temperature
During operation:

32 to + 194°F
0 to + 90°C

During storage and transport:

- 4 to + 158°F

-20 to + 170°C

660

640

620

600

580

560

Resistance in

540

0 20 40 60 80 100
32 68 104 140 176 212

DHW tank temperature in °C / °F

18

ctrical connection

Ele

The sensors are ready to connect.
Insert the DHW temperature sensor lead
wires to terminals X2.7 and 2.1 of the
A2 Module.

Heating systems without domestic hot
water heating

Do not connect the DHW tank
temperature sensor.

5727 946 v1.2

Connection of the pumps

Available pump connections

sÖ Heating circuit high temperature

(without mixing valve)

sÖM2 Heating circuit M2 pump

Terminals 2 - L, - G , - N

sÖM3 Heating circuit M3 pump

Terminals 1 - L, - G , - N

sA DHW pump for heating up the

domestic hot water tank ­Terminals 4 - L, - G , - N

sK DHW recirulation pump

Terminals 3 - L, - G, - N.

Installation – Vitotronic 300-K

TERMINAL

4 or 3

A

B

Install pumps: see
manufacturer’s
instructions.

120 VAC pumps

Note:

The maximum power consumption of
all pumps is 4A .
Rated current: max. 2 FLA
Recommended connection
cable: AWG 14

Connect the 3-wire cable from the
pump to the corresponding terminals.

240 VAC or 3 PH pumps

Note:

Use contactor to switch pump.
For activating the contactor:
Rated current: max. 2 FLA
Recommended connection
cable: AWG 14

Please ensure that all connections and
cable gauge comply with local and
national codes.

1.Select the contactor and the
connecting cable in accordance with
the rating of the pump that is to be
connected.

2.Connect the pump and power supply
to the contactor.

3.Connect contactor coil to the
corresponding terminals.

5727 946 v1.2

19

Installation – Vitotronic 300-K

Connection of modulating valve actuators

Control unit

20V or 24V valve adaptor

1 1

2 DIN rail in connection enclosure

3 aBH Terminals

120V Valve Adaptor

Rated voltage: 120 VAC
Rated current: max. 0.1 FLA
Recommended connection
wire size: AWG 14

24V Valve Adaptor

Rated voltage: 24 VAC
Rated current: max. 0.15 FLA
Recommended connection
wire size: AWG 14

Operating time:

5 to 199 sec. selected via coding
address “40”.

1 120V valve adaptor

2 120V valve actuator

1 24V valve adaptor

2 24V valve actuator

1. Disconnect power to control.

2. Install 120V or 24V valve adaptor
on DIN rail inside connection
enclosure.

3. Insert the plug gS into socket gS on
the control.

4. Fasten cable with tie.

5. Connect black wire of the adaptor to
connection aBH on the DIN rail

- Terminal 8, 9 or 10.

6. Connect valve actuator wires to the

adaptor terminals as shown on
figures.

20

5727 946 v1.2

Connection of external contacts

Implement connection a
A2 in accordance with the overview on
pages 15 and 16 and the control panel
wiring diagram.

VD / aVH on

A External heating program

changeover or “Mixing valve open”

Contact closed:

The manually pre-selected heating
program can be changed via this
contact, (see table below) enabling the
mixing valves to be opened.

The mixing valve open function can be
allocated via coding address “9A”, and
the heating program changeover can be
allocated to the heating circuits via
address “91”.

Installation – Vitotronic 300-K

WARNING

Heating circuits are no longer frost
protected during mixing valve closed.
A minimum boiler return temperature
is not maintained during external
disabling.

Via coding address “99”, you can
pre-select what input aVD should
affect.

A External heating program

changeover/external “Mixing valve
open”.

B External disable/external “Mixing

valve closed”

C External demand

Manually pre-selected
heating program

(with open contact)

9

Room heating OFF/
DHW OFF

or

worRoom heating OFF/

DHW ON

rw Room heating ON/

DHW ON

Coding 2 Changed heating program

d5: 0
(factory
default)

d5: 1 <–> Continuous operation with normal room temperature/DHW in

B External disable/external “Mixing

valve closed”

Closing the dry contact causes the
burner to shut down or the mixing
valve to be closed.
Allocated boiler or pumps are switched
OFF, and isolation valves are closed.
No frost protection!

(with closed contact)

<–> Continuous operation with reduced room temperature/DHW OFF

accordance with coding address “64”

C External demand

Closing the dry contact starts the boiler
burners, subject to load via a set
supply temperature (coding address
“9b”) on Vitotronic 300-K.

The supply temperature is limited via
the set min. and max. supply
temperature.

5727 946 v1.2

21

Installation – Vitotronic 300-K

Connection of the compiled failure alarm

Implement connection gÖ on A3 in
accordance with overview on page 104
and control panel wiring.

A3

gÖ

A

B

Rated voltage: 120 VAC 60 Hz
Rated current: max. 2 FLA
Recommended connection
wire size: AWG 14

1. Disconnect power to control and
burner.

2. Connect the compiled failure alarm
as shown in the diagram.

A Connect terminal strip in

connection enclosure of boiler
control

B Visual and/or audible alarm device

(120 VAC)

22

5727 946 v1.2

Installation – Vitotronic 300-K

Making the LON connection

The Viessmann LON system is designed for the Line BUS topology with end of line resistors on both ends.

Connection with Viessmann LON cable

A A A

C

23ft. / 7m

B B

A Control unit or Vitocom
B LON cable

Connection with

 Viessmann LON cable and
 Viessmann LON coupling

A A A

C

23ft. / 7m

B

3ft. / 7m 23ft. / 7m

2

B

A Control unit or Vitocom
B LON cable (max. 3 cables

between two devices)

D

23ft. / 7m

C

C End of line resistor

B

23ft. / 7m

B

D

23ft. / 7m

B

DD

23ft. / 7m

B

C

C End of line resistor D LON extension jack,

5727 946 v1.2

23

Installation – Vitotronic 300-K

Making the LON connection (continued)

Connection with

Viessmann LON cable,
On-site cable for extensions up to 900 m / 3000 ft.

A A A

C

A Control unit or Vitocom
B LON cable
C End of line resistor (standard

D Up to 99 participants and the

E Junction box
F Connecting cable (on site)

23ft. / 7m

B B B

delivery of Vitotronic 300-K)

corresponding number of junction
boxes and cables

E E

F

Power supply

23ft. / 7m 23ft. / 7m

B

max. 900 m / 3000 ft.

Note:

The Viessmann LON system always
requires two conductors and shielding.
Conductors are interchangeable.

Observe the requirements for cabling
and operation of the LON interface
FTT-10A (see www.echelon.com).

E

D

E

23ft. / 7m

1. Ensure that the main power supply

C

to the control contains overcurrent
protection with a minimum rating of
6A and 2-pole disconnect

Legend

L: Line
N: Neutral
G: Ground

A Power supply 120 VAC, 1PH,

60Hz, provide disconnect means
and overcurrent protection as per
local codes

B Terminal fÖ in connection

enclosure

C Connection enclosure

24

WARNING

The control must be grounded.
Ensure that “L”, “N” and “G” are
not interchanged.

2. Connect power supply wire to the

connection fÖ terminals 11, N and G
on the DIN rail inside the connection
enclosure.

5727 946 v1.2

Initial start-up

Steps

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . ..

1. Commissioning all Vitodens 200-W with Vitotronic 100
Vitodens 200-W Service Instructions 26

2. Controls and display elements

H Vitotronic 100, HC1 26

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. ..

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . ..

.

Page

3. Checking the heating circuit allocation (Vitotronic 300-K) 27

4. Changing the display language (Vitotronic 300-K) 27

5. Configuring a multi-boiler system 28

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. ..

6. Updating the LON participant list on Vitotronic 300-K 29

7. Connecting control units into the LON system 29

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .

8. Carrying out a participant check (Vitotronic 300-K) 29

9. Reducing the maximum burner output (Vitotronic 100) 30

10. Matching the coding addresses to the system version (Vitotronic 100) 30

11. Matching the coding addresses to the system version (Vitotronic 300-K) 30

12. Checking outputs (actuators) and sensors 31

13. Selecting the boiler sequence (Vitotronic 300-K) 32

14. Adjusting the heating curve (Vitotronic 300-K) 33

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. . .

. .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. .. .

5727 946 v1.2

25

Initial start-up

Further step-by-step instructions

Commissioning of all Vitodens 200-W, WB2B with Vitotronic 100, HC1

Service Instructions Vitodens 200-W, WB2B

A

ºC

A Heating programs
B No function
C Information

+

OK

i

–

BD CEFGHK

D Fact0ory default setting
E Confirmation
F Value setting

G No function
H Emissions test function
K Boiler water temperature

26

5727 946 v1.2

Further step-by-step instructions (continued)

Boiler sequence

Initial start-up

A Heating circuit selection
B Reduced room temperature
C DHW temperature
D Normal room temperature
E Standby mode
F DHW only

G Heating and DHW
H Economy mode
K Party mode
L Information
M Standard settings
N Confirmation

Checking the heating circuit allocation (Vitotronic 300-K)

heck that the label for heating

H C

circuit allocation has been affixed to
the corresponding fields of the
programming unit.

H Press the corresponding key before

commencing all adjustments.

Changing the display language (Vitotronic 300-K)

1. Press i.

2. Select the required language

with .

3. Confirm with .

O Adjusting values
P Time programs
R Holiday program
S Time/date
T Heating curve level shift
U Heating curve slope

5727 946 v1.2

27

Initial start-up

Further step-by-step instructions (continued)

Configuring a multi-boiler system

The cascade communication module must be fitted into all Vitotronic 100 boiler control.
Setting codes, see page 80 and 86.

Example of a multi-boiler system

Vitotronic 300-K

145

Vitotronic 300-K

––

––

Number of connected boilers
< 5 boilers
Set code ”35:2”, ”35:3” or
”35:4”

Vitotronic 100 Vitotronic 100

KMK1 KMK2

Vitotronic 100, HC1

Multi-boiler system
Set code ”01:2”

Boiler number 1
Coding ”07:1”

–– ––

Connecting control units into the LON system

The LON communication module (accessories) must be fitted.

ote:

N

The data transfer via the LON system can take several minutes.

Vitotronic 200-H

– – – –

– – – –

KMK1

Vitotronic 300-K

Multi-boiler system
Set code ”01:2”

Boiler number 4

Set code ”07:4”

Setting up LON participant numbers

In coding 1, set the LON participant
number via coding address “77”.

Vitotronic 300-K

1. Set the number of boilers

In coding 1, set coding address “35”.
Coding 1 see page 82.

Note:
In one LON system, each number
must only be allocated once.

Only one Vitotronic may be
programmed as fault manager.

28

Installation and service
instructions, Vitotronic 200-H.

Note:
In one LON system, each number
must only be allocated once.

5727 946 v1.2

Initial start-up

Further step-by-step instructions (continued)

Update the LON participant list on Vitotronic 300-K

Only possible if all users are connected and the control unit is encoded as fault manager (coding 79 : 1 factory default setting)

Note: In each heating system, only one Vitotronic may be encoded as fault manager.

1. Press w and

for approx. 2 s.
The participant check is initiated.

simultaneously

2. Press D.
The participant list is updated
after approx. 2 min.
Participant check completed.

Example of a LON system

Vitotronic 300-K

Participant no. 5
Code ”77:5”

Send time via LON
Code ”7b:1”

Transmit outdoor temperature
via LON
Set code ”97:2”

”79:1” Fault Manager ”79:0” Control is not fault

”9C:20” Monitoring LON
Participant

Vitotronic 200-H

LONLON

Participant no. 10
Set code ”77:10”

Accept time via LON
Set code ”81:3”

Receive outdoor temperature
via LON
Set code ”97:1”

manager
”9C:20” Monitoring LON

Participant

Vitotronic 200-H

LON

Participant no. 11
Set code ”77:11”

Accept time via LON
Set code ”81:3”

Device receives the time

”79:0” Control is not fault
manager

”9C:20” Monitoring LON
Participant

Vitocom

Participant no. 99

Time received via LON

Carrying out a participant check (300-K)

The communication with the system devices connected to the fault manager is tested by means of a participant check.
Preconditions:

H The control unit must be programmed as fault manager (code 79:1).
H The LON participant number must be programmed in all control units

(see page 28).

H The fault manager participant list must be up to date.

Participant check

F01 : 01

1

Participant

Consecutive
number in the
participant list

5727 946 v1.2

number

1. Press w and simultaneously for
approx. 2 seconds.

2. Select the required participant with

and .

3. Activate check with .
”Check” flashes until its completion.

The display and all key illuminations
of the selected participant flash for
approx. 60 seconds.

H During communication between

both devices ”Check OK” is
displayed.

H ”Check not OK” is displayed, if no

communication is established.
Check the LON connection and
coding.

4. To check further participants
proceed as described under points 2
and 3.

5. Press w and
approx. 1 second.

simultaneously for

29

Initial start-up

Further step-by-step instructions (continued)

Reducing the maximum burner output (Vitotronic 100)

Vitodens 200 service instructions

Matching the coding addresses to respective system version (Vitotronic 100)

In code 1, set the following coding

ddresses:

a
01 Multi-boiler system
06 Maximum boiler temperature

In code 2, set the following coding
addresses:
76:2 With cascade communication

module KMK
07 Boiler number
2F Air bleed function

Matching coding addresses to respective system version (Vitotronic 300-K)

In code 1, set the following coding
addresses:
00 System design
35 Number of boilers in cascade
36 Minimum limit of the cascade

supply temperature

37 Maximum limit of the cascade

supply temperature

*1

3b Control type
3C Control strategy
77 LON participant number

*2

A2 DHW priority
A5 Heating circuit pump logic

function (economy control)

C5 Minimum supply temperature

limit, heating circuits

C6 Maximum supply temperature

limit, heating circuits

In code 2, set the following coding
addresses:
38 Lead boiler rotation
39 Permanent lead boiler
3A Permanent last boiler
55 Function DHW temperature

control

78 LON communication enabled
7A Central control
7F Detached house or apartment

building (management system)

98 Viessmann system number

*1

9C Monitoring LON participants

*1

Not higher than (Vitotronic 100 Coding Level 1 - 06:)

*2

Only in conjunction with LON system

30

5727 946 v1.2

Further step-by-step instructions (continued)

Checking outputs (actuators) and sensors

Vitotronic 100
Relay test

Initial start-up

1. Press 9 and
approx. two seconds.

The following relay outputs may be selected:

Display
indication

11
12
13

14

Check sensors

1. Press .

Scanning operating conditions is
active, see page 38.

Relay function

Burner modulation lower output

Burner modulation upper output

Internal pump/ output 20 ON (Power Pump module)

Output 50 ON/ fault indicator in Power Pump Module

simultaneously for

2. Select the relay outputs

2. Scan the actual temperature with

with or .

or .

3. Press .

3. Press

Scanning is completed.

.

5727 946 v1.2

31

Initial start-up

Further step-by-step instructions (continued)

Vitotronic 300-K

Relay test

1. Press 9 and simultaneously for

approx. two seconds.

The following relay outputs may be selected:

Output 20M1 ON
Output 52A1 open

Output 52A1 ntr.
Output 52A1 close

DHW tank heating pump ON
DHW recirculation pump ON
Heating pump (M2) ON
Heating pump (M3) ON

Check sensors

1. Press
Scanning operating conditions is
active, see page 43.

.

2. Select the relay outputs
with

Mixing valve (M2) open
Mixing valve (M2) close
Mixing valve (M3) open
Mixing valve (M3) close
Central fault display ON

2. Scan the actual temperature with
or .

or .

Selecting the boiler sequence (Vitotronic 300-K)

f required:

1. I
In coding 2, set coding addresses 39
(permanent lead boiler) and 3A
(permanent last boiler).

2. Press and simultaneously for
approx. two seconds.

3. Select the required boiler sequence
with or .
By pressing and
simultaneously, you can exit the
adjustment without saving any
modifications made.

3. Press

Note:

The illuminated heating circuit selector
button indicates the corresponding
heating circuit.

3. Press .
Scanning is completed.

4. Press .
The adjustment has been
transferred.

5. In coding 2, set the coding
addresses 38, 41, 42, 43 and 44;
see also the function description
from page 59.

.

32

5727 946 v1.2

Initial start-up

Further step-by-step instructions (continued)

Adjusting the heating curve (Vitotronic 300-K)

The heating curves illustrate the relationship between the outdoor temperature and the boiler water or the supply
temperature. To put it simply: the lower the outdoor temperature, the higher the boiler water or supply temperature.
The room temperature again depends on the boiler water or the supply temperature.

Factory default settings:

Slope:
Shift: = 0

Generally, the heating curve is set:

In range A for underfloor heating systems,
In range B for low temperature heating systems (according to the Energy Savings Order),

= 1.4

Slope

3.4

3.2

3.0

2.8

2.6

2.4

90/194

80/176

70/158

60/140

50/122

Supply tempertaure in ºC / ºF

40/104

30/86

35
95

30
86

25
77

20
68

15
59

Set room temperature in ºC / ºF

10
50

10
50

5

-1014-15

41032-523

Outdoor temperature in ºC / ºF

5
41

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

-20

-4

5

5727 946 v1.2

33

Initial start-up

Further step-by-step instructions (continued)

Changing slope and shift

(for every heating circuit separately)

1. Call up slope with ,
adjustable value 0.2 to 3.5;
call up shift with

;
adjustable value 8.6 to 104°F / –13
to +40°C.

110
230

A

Supply temperature in °C / °F

3.5

2. Change the value with

3. Confirm the set value with

B

1.4

0.2

or .

.

+20 / 68

Outdoor temperature in °C / °F

A Change slope
B Change shift

-20 / -4

34

5727 946 v1.2

Further step-by-step instructions (continued)

Adjusting the normal room temperature

(for every heating circuit separately)

Initial start-up

D

1

Standard roomtemp.

2
3

1
2
3

20

Reduced roomtemp.

14

Select the normal day temperature with
the set value adjuster.

Reduced room temperature:

1. Call up the reduced night

temperature with tm.

Normal room temperature:

The value will be automatically
transferred after approx. 2 seconds.

2. Change the value with

or .

3. Confirm the set value with .

Temperature conversion:

˚F ˚C

-4 -20
41 5
57 14
68 20
79 26

230 110

E

D E

Example 1:

Adjustment of the normal room
temperature from 68 to 79˚F / 20 to
26˚C.

A Boiler water temperature or supply

temperature in ˚F / ˚C

B Outdoor temperature in ˚F / ˚C
C Set room temperature in ˚F / ˚C
D Heating circuit pump OFF
E Heating circuit pump ON

5727 946 v1.2

Example 2:

Adjustment of the reduced room
temperature from 41 to 57˚F / 5 to
14˚C.

Accordingly, the heating curve is
adjusted along the set room temperature
axis, resulting in modified start/shutdown
characteristics for the heating circuit
pumps, if the heating circuit pump logic
is active.

35

Service scanning – Vitotronic 100, HC1

Service level summary

Function Entry Exit Page

Reducing the max.
burner output

Relay test Press 9 and “OK”

Temperatures,
boiler coding card
and brief scans

Operating
conditions

Troubleshooting Press “OK” 44
Fault history Press rw and “OK”

Resetting codes
to the factory
default setting

Coding Level 1 Press 9 and w

Coding Level 2 Press w and rw

Press 9 and tw
simultaneously for
approx. 2 seconds

simultaneously for
approx. 2 seconds

Press 9 and rw
simultaneously for
approx. 2 seconds

Press 8 Press 8 43

simultaneously for
approx. 2 seconds

Press w and rw
simultaneously for
approx. 2 seconds
press D

simultaneously for
approx. 2 seconds

simultaneously for approx.
2 seconds

Press “OK” 29

Press “OK” 32

Press “OK” 32

Press “OK” 44

–– 82

Press 9 and w
simultaneously for
approx. 1 second

Press w and rw
simultaneously for
approx. 1 second

79

80

Vitodens 200-W Service Instructions

36

5727 946 v1.2

Temperatures, boiler coding card and quick scans

Service scanning – Vitotronic 100, HC1

1. Press 9 and rw simultaneously
for approx. two seconds.

Brief scans

8

0 System

1 Burner control unit software

E No function
3 Set boiler temperature
A Highest demand temperature
4 Burner control unit type Boiler type
5 No function
b Maximum heating output in %
C Boiler coding card (hexadecimal)
c Equipment version (EEPROM) Burner control unit version

d Variable speed

8 8 8 8 8

2. Select the required scan
with or .

Control unit software version Programming

design 1

version

(EEPROM)

pump
0 without
1 Wilo
2 Grundfos

unit software
version

Cascade
module
software
version

Variable speed
pump software
version
0: No variable

speed pump

5727 946 v1.2

37

Service scanning – Vitotronic 100, HC1

Scanning operating conditions

1. Press 8. 2. Select the required operating

condition scan with or .

Scans

Display

indication

0 01

3__65

263572

030417

Explanation Notes

Boiler number ––

°C Boiler temperature ––

h Burner hours run The hours run can be reset to 0 with D.

The hours run displayed are only
approximate values.

Burner starts The burner starts can be reset to 0

with D.

3. Press .

38

5727 946 v1.2

Service scanning – Vitotronic 100, HC1

Scanning and resetting service displays

After the limits set up via coding addresses 21 and 23 (see page 80) have been reached, the programming unit display
flashes one of the following messages.

Note:

Set code 24:1 and then code 24:0, if maintenance is implemented before a maintenance message is displayed; the set
maintenance parameters for hours run and maintenance intervals are then reset to 0.

Display
indication

35510

___12

After maintenance has been carried out

1. Reset coding 24: 1 (see page 80) to

24: 0.

Note:

If coding address 24 is not reset, a
new maintenance message will be
displayed on Monday morning.

2. If required:

Press
Reset burner run hours and burner

starts with D select the value to 0
(see page 80)

Press or for further queries
Press query is complete

Explanation

Burner run hours have

h

been reached

Time interval

u

(e.g. 12 months)
has been reached

1. Scan maintenance messages with

or .

2. Press .
The maintenance indication in the
display is cleared.

Note:

An acknowledged maintenance
message can be redisplayed by
pressing (approx. three seconds).

5727 946 v1.2

39

Service scanning – Vitotronic 300-K

Service level summary

Function Entry Exit Page

Adjusting display
contrast

Participant check Press the w and “OK” buttons

Relay test Press the 9 and “OK” buttons

Boiler sequence Press the g and û buttons

Temperatures and
quick scans

Operating status Press the  button Press the  button 43

Troubleshooting Press the  button Press the “OK” button 48

Error history Press the rw and “OK”

Resetting codings
to factory default
settings

Coding Level 1 Press 9 and w simultaneously

Coding Level 2 Press the w and rw buttons

Press the “OK” and “+”
buttons simultaneously;
the display will darken

Press the “OK” and “-” buttons
simultaneously;
the display will get lighter

simultaneously for approx.
2 seconds

simultaneously for approx. 2
seconds

simultaneously for approx. 2
seconds

Press 9 and rw
simultaneously for approx. 2
seconds

buttons simultaneously for
approx. 2 seconds

Press the w and rw buttons
simultaneously for approx.
2 seconds; press the D button;
confirm by pressing the “OK”
button

for approx. 2 seconds

simultaneously for approx. 2
seconds; confirm by pressing the
“OK” button

–– ––

–– ––

Press the w and “OK” buttons simultaneously for approx. 1 sec 29

Press the “OK” button 32

Press the “OK” button 32

Press the “OK” button 41

Press the “OK” button 48

–– 79

Press the 9 and w buttons simultaneously for approx. 1 sec 79

Press the w and rw buttons simultaneously for approx. 1 sec 80

40

5727 946 v1.2

Temperatures and quick scans

Service scanning – Vitotronic 300-K

1. Press 9 and rw simultaneously
for approx. 2 seconds.

2. Select the required scan
with or .

The following values can be scanned subject to the actual equipment level:

Outdoor temperature adjusted
Outdoor temperature actual
Boiler sequence
P-actual % boiler 1 to 4
Output red. %
Integral

Boiler temperature actual boiler . . . .

1 to 4

Sensor 17B actual (not used)
Set DHW temperature
Actual DHW temperature

Supply temperature set
Supply temperature actual
Room temperature set
Roomtemperature actual

Quick scan 1 to quick scan 8

3. Press “OK”.

The adjusted outdoor temperature
can be reset to the current outdoor
temperature with D.
Boiler output - actual value.
No function.
at - 1 to - 100 start-up integral in
percent; at 1 to 100 shutdown
integral in percent (Y - arrow above

ord, when integral grows).

w

Display only if a sensor is connected.
Display only if a system design with

a DHW tankhas been encoded . . . . .

(code 00).

Display only if a remote control unit
is installed
Quick scans 1 to 7, see page
NO TAG.

5727 946 v1.2

41

42

Service scans – Vitotronic 300-K

Temperatures and quick scans (continued)

8

N/A

Software version
remote control
mixing valve
circuit M3

N/A

re

8

N/A

Software version
mixing valve
extension M3
Printed Circuit
Board

Operating mode
mixing valve
circuit M3
0 w/o remote

control

1 with

Vitotrol 200

2 with

Vitotrol 300

Node address
Number of

LON participants

N/A

design temperatu

r

8

Number of KM
BUS
participants

N/A

Software version
remote control
mixing valve
circuit M2

A

stem number

N/A

Maximum system

d

8

N/A

Software version
mixing valve
extension M2
Printed Circuit
Board

Operating mode
mixing valve
circuit M2
0 w/o remote

control

1 with

Vitotrol 200

2 with

Vitotrol 300

N/

A

Subnet address/s

y

Software version
neuron chip

N/A

N/A

8

ee coding

Software version
programming
unit

Software version
remote control
system circuit
A1

umber

Software version
communication
co-processor

ition adjustable

“92

”

/decimal:18

6

N/A

Scan

8

Display acc. to
system designs (s
address 00)

Software version
control unit

Operating mode
sys. circuit A1
0 w/o remote

control

1 with

Vitotrol 200

2 with

Vitotrol 300

LON participant n

u

SNVT
configuration
0 = Auto
1 = Tool

Equipment recogn

i

viacodingaddres

s

hexa-decimal:b8

/

N/A

Scan

1

2

3

4

5
6

7

8

5727 946 v1.2

Scanning operating conditions

Service scanning – Vitotronic 300-K

1. Press .

2. Select the required scan

with or .

The following values can be scanned subject to the actual equipment level:

Participant number
Holiday program with departure and

return date

Holiday program active

Outdoor temperature
Boiler sequence
Common supply temperature
Boiler temp. 1 to 4
Sensor 17B (not used)
DHW temperature

Supply temperature
Return temperature
Room temperature

Time
Date
Output 20 ON/OFF
Output 29 ON/OFF
Output 52 open/close
DHW tank heating pump ON/OFF
DHW recirculation pump ON/OFF
Heating pump ON/OFF
Mixing valve open/closed
Languages

3. Press .

If a holiday program has been entered

If a central holiday program is active

Actual value boilers 1 to 4
Display only if a sensor is connected

Display only if a DHW tank sensor is
connected

Display only in conjunction with
mixing valve circuits
Display only if a remote control unit
is installed

Position detail in %

Position detail in %.
Each language can be selected as
permanent display language
with

A fault can be acknowledged with
“OK”. The fault message in the display
will be hidden, but the red fault
indicator U continues to flash.
The fault message will be redisplayed,
if an acknowledged fault message has
not been removed by the following
morning.

Calling up acknowledged fault
messages

Press “OK” for approximately 2
seconds.
Select the acknowledged fault with
or .

E in the display indicates that the
burner control unit is locked out. After
the fault has been removed,
acknowledge by pressing reset E.

Note:

After acknowledging the fault, E will
be displayed until the burner control
unit lockout has been lifted.

5727 946 v1.2

43

Troubleshooting – Vitotronic 100, HC1

Retrieving fault codes from the fault memory (fault history)

The most recent 10 faults are saved and may be called up.
Faults are sorted by date. The most recent fault is fault number 1.

1. Press rw and
for approx. 2 seconds.

2. Press or for individual fault
codes.

Note:

All saved fault codes can be deleted
with D.

3. Press to finish scan.

Faults displayed at the programming unit

The red faults indicator U flashes for
every fault.
A fault code flashes in the display if a
fault message has been issued.

i Consecutive fault number
38 Fault code

U Fault symbol

Call up further fault codes with

.

A fault can be acknowledged with
“OK”. The fault message in the display
will be hidden, but the red fault
indicator U continues to flash.
The fault message will be redisplayed,
if an acknowledged fault message has
not been removed by the following
morning.

Calling up acknowledged fault
messages

Press “OK” for approximately 2
seconds.
Select the acknowledged fault with
or .

or

E in the display indicates that the
burner control unit is locked out. After
the fault has been removed,
acknowledge by pressing reset E.

simultaneously

44

Note:

After acknowledging the fault, E will
be displayed until the burner control
unit lockout has been lifted.

5727 946 v1.25727 946 v1.2

Faults displayed at the programming unit (continued)

Troubleshooting – Vitotronic 100, HC1

Fault
code

0000ffff

33330000

33338888

bbbb0000

bbbb1111

bbbb4444

bbbb5555

bbbb7777

bbbb8888

e4444

System characteristics

Control mode Service “0F” is only displayed in the

Burner blocked

Control mode (stays in factory
default setting)

regulates as if the outdoor
temperature was 32°F / 0°C

Control mode
(factory default setting)

Burner blocked

Cause Remedy

fault history

Boiler water temperature sensor
shorted out

Boiler water temperature sensor
cable broken

Flue gas temperature sensor
shorted out.

Communication fault ­programming unit (internal)

Internal fault Replace the control unit.

Boiler coding card missing, faulty or
incorrect boiler coding card.

Flue gas temperature sensor cable
broken.

Fault, supply voltage 24V Replace the control unit.

Service the equipment.

Note:

After the service, reset coding
address “24” to “0”.

Check the boiler water temperature
sensor

Check the flue gas temperature
sensor (see Vitodens 200-W
Start-up/Service Instructions).

Check connections and replace
programming unit, if required.

Plug in boiler coding card or replace,
if faulty.

Check the flue gas temperature
sensor (see Vitodens 200-W
Start-up/Service Instructions)

5727 946 v1.2

e5555

e8

e9

ea

Burner in fault mode

Internal fault Check ionization electrode and

connecting cables, check tightness
of flue gas system.
Press “E RESET”.

The ionization current lies outside
the permiss. range.

The ionization current lies outside
the permiss. range during
calibration.

The ionization current lies outside
the permiss. range during
calibration.

Check ionization electrode and
cable. Press “E RESET”.

Check ionization electrode and
cable. Press “E RESET”.

Check ionization electrode and
cable. Press “E RESET”.

45

Troubleshooting – Vitotronic 100, HC1

Faults displayed at the programming unit (continued)

Fault
code

ebbbb

ec

ed
ee

effff

ffff0000
ffff1111

ffff2222

ffff3333

System characteristics

Burner blocked Boiler control initiated a combustion

Burner in fault mode

Burner blocked Internal fault. Replace control unit.

Burner in a fault mode Maximum flue gas temperature

Cause Remedy

- Heat generated by boiler must be
calibration but could not complete
the process

The ionization current lies outside
the permiss. range during
calibration.

Internal fault. Replace the control unit.

At burner start, flame signal is
missing or too week.

Flame is lost immediately after it
has built (during the safety time).

exceeded (230ºF / 110ºC).

Fixed high limit switch open
(activated).

Flame signal is already present at
burner start.

removed (boiler is cycling on
temperature limits, before
calibration process is complete)

- Check the connecting cable and

the ionization electrode, check the
flue gas system (flue gas
recirculation).

- Verify pump operation

- Switching points of flow switch

marginal (not enough flow)

- Check coding card

- Check gas valve

- Check coding address 82

- Also see address 12:_

Press “E RESET”.
Check ionization electrode and

cable. Press “E RESET”.

Check ionization electrode and
cable, test ionization current, check
gas supply, check ignition and
ignition module, check condensate
drain. Press “E RESET”.

Check gas supply, check flue
gas/exhaust pipe/air intake for flue
gas recirculation, check ionization
electrode (replace if necessary)
Press “E RESET”.

Check the heating system fill level.
Bleed air from system. Press “E
RESET” after vent system has
cooled down.

Check heating system fill level.
Check the circulation pump. Bleed
air from the system. Check fixed
high limit switch and connecting
cables. Press “E RESET”.

Check the ionization electrode and
connecting cable. Press “E RESET”.

46

5727 946 v1.2

Faults displayed at the programming unit (continued)

controlunitiftheequipmentwillno

t

Troubleshooting – Vitotronic 100, HC1

Fault
code

ffff4444

ffff8888

ffff9999

ffffaaaa

ffffcccc

ffffdddd

ffffeeee

ffffffff

No fault

code

System characteristics

Burner in a fault mode

Burner blocked Burner control unit fault. Check ignition electrodes and

Burner blocked or in a fault mode

Boiler/burner in standstill Flow switch open Check pump operation and flow

*1

Cause Remedy

No flame signal is present. Check ionization electrode and

cable, measure the ionization
current, check the gas pressure,
check the gas valve, ignition,
ignition module, ignition electrodes
and condensate drain. Press “E
RESET”.

The gas valve closes too late. Check gas valve and both control

wiring and connections. Press “E
RESET”.

Fan speed too low at burner start. Check fan, fan supply cables, fan

power supply and control. Press “E
RESET”.

Fan not at standstill. Check the fan, the fan connecting

cables and fan control. Press “E
RESET”.

Gas valve faulty or faulty
modulation valve control; or vent
system blocked.

Strong interference (EMC) field
nearby, or faulty main PCB.

Strong interference (EMC) field
nearby, or internal fault.

Check the gas valve. check the vent
system. Press “E RESET”.

connecting cables. Check the boiler
coding card. Check whether a
strong interference (EMC) field
exists near the equipment; press
“E RESET”. Replace control unit if
the fault persists.

Restart the equipment. Replace the
control unit if the equipment will not
restart.

switch.

displayed

*1

Control mode: Boiler/burner fully operational (fault code must be verified and reset).
Burner in fault mode: Boiler control requires manual reset before burner can resume operation.
Burner blocked: If fault cause is corrected, burner resumes operation.

5727 946 v1.2

47

Troubleshooting – Vitotronic 300-K

Retrieving fault codes from the fault memory (fault history)

The most recent 10 faults are saved and may be called up.
Faults are sorted by date. The most recent fault is fault number 1.

Fault history

1

1

18

1. Press rw and simultaneously
for approx. 2 seconds.

2. Call up the individual fault codes
with

Note:

All saved fault codes can be deleted
with D.

3. Press .

Faults displayed at the programming unit

Red fault indicator U flashes for all faults.
The display flashes “Fault” if a fault message is issued.

Troubleshooting

1. Press .

Outdoor temp. sensor

2. Call up further fault codes

DBG-

1

101

Fault

DBG-

1

U Fault symbol

2 Consecutive number (1 to 10)
d5 Fault code (for explanations see

page 49)

d52

with or .
The fault can be acknowledged with

. The fault message in the display
will be hidden, but the red fault
lindicator U continues to flash. A
new fault message will be displayed
if an acknowledged fault is not
removed by the following morning.
A central fault messaging device
connected to plug gÖ will be
activated.

or

Fault display in plain text

Ext. fault
Outdoor temperature sensor
Supply sensor
DHW tank sensor (1 or 2; display

only, if a second DHW tank
temperature sensor is connected)

Return sensor
Room temperature sensor
Flue gas sensor
Collector sensor
Solar DHW sensor
Participant number
Participant fault (display only if

control unit is programmed as fault
manager)

48

Calling up acknowledged fault
messages

Press
fault will then be displayed.
Select the acknowledged fault
with or .

for approx. 2 seconds. The

5727 946 v1.2

5727 946 v1.2

Faults displayed at the programming unit (continued)

temperaturewas3

2˚F/0˚C

temperaturesensor(suppl

y

Troubleshooting – Vitotronic 300-K

Fault display in plain text

Ext. fault
Outdoor temperature sensor
Supply sensor
DHW tank sensor (1 or 2; display

only, if a second DHW tank
temperature sensor is connected)

Room temperature sensor
Participant fault (display only if

control unit is programmed as fault
manager)

Fault
code

0000ffff

11110000

System characteristics

Control mode Service “0F” is only displayed in the

Controls as if the outdoor
temperature was 32˚F / 0˚C

11118888

22220000

Vitocontrol-S, WB2B controls in a
stand-alone manner w/o supply

Calling up acknowledged fault
messages

Press for approx. 2 seconds. The
fault will then be displayed.
Select the acknowledged fault
with

or .

Cause Remedy

fault history

Outdoor temperature sensor shorted
out

Outdoor temperature sensor cable
broken

Common supply temperature sensor
shorted out

Service the equipment.

Note:

After the service, reset coding
address “24” to “0”.

Check outdoor temperature sensor
(see page 67)

Check common supply temperature
sensor (see page 66)

22228888

44440000

44444444

44448888

4444cccc

temperature may not be high
enough)

Mixing valve closes Supply temperature sensor of

Common supply temperature sensor
cable broken

mixing valve circuit M2 shorted out

Supply temperature sensor of
mixing valve circuit M3 shorted out

Supply temperature sensor cable of
mixing valve circuit M2 broken

Supply temperature sensor cable of
mixing valve circuit M3 broken

Check supply temperature sensor
(see page 66)

5727 946 v1.2

49

Troubleshooting – Vitotronic 300-K

returncontrolopen

returncontrolopen

Mixingvalveprimarycircuitclosed

,

Withouttemperaturesensor:

100ofboiler1to4

codeontherespectiveVitotronic

100ofboiler1to4codeontherespectiveVitotroni

c

ofboiler1to

4

communicationmoduleofth

e

ofboiler1to

4

8D-BoilerNo.2

communicationmoduleofth

e

cable,ifrequire

d

8D-BoilerNo.2

8F-BoilerNo.4

cable,ifrequire

d

(seeaddress07:onpage9and80)

8F-BoilerNo.4(seeaddress07:onpage9and80

)

Faults displayed at the programming unit (continued)

Fault
code

55550000

55551111

55558888

55559999

66660000

System characteristics

DHW tank primary pump ON:

Set DHW temp.= set boiler water
temp., priority controls are cancelled

or

ith DHW tank primary system:

W
DHW heating is started and stopped
by DHW tank temp. sensor 2 (not
used)

With DHW tank primary system:
DHW heating is started and stopped
by DHW tank temp. sensor

DHW tank primary pump ON:

Set DHW temp.= set boiler water
temp., priority controls are cancelled
or

With DHW tank primary system:
DHW heating is started and stopped
by DHW tank temp. sensor 2 (not
used)

With DHW tank primary system:
DHW heating is started and stopped
by DHW tank temp. sensor

Boiler with maximum temp.,

Cause Remedy

DHW tank temperature sensor 1
shorted out

DHW tank temperature sensor 2
(not used) shorted out

DHW tank temperature sensor cable
broken

DHW tank temperature sensor 2
(not used) cable broken

Sensor incorrectly connected Set code “4A:0”

Check DHW tank temp. sensor

66668888
77770000

77778888

88884444
88885555
88886666
88887777
8888CCCCCCCCcccc
8888dddd
8888eeee
8888ffff

With DHW tank primary system:
Mixing valve primary circuit closed,
no DHW heating (not used).

Control mode Maintenance or error on Vitotronic

Temperature sensor aJB shorted
out

Temperature sensor aJB cable
broken

Communication fault Vitotronic 100

8C - Boiler No. 1

8E - Boiler No. 3

Check temperature sensor
Without temperature sensor:
Set code “4b:0”

Check maintenance display or fault

100

Check and replace cascade

Vitotronic 100 and connecting

- check for assigned participant no.

- if problem persists, replace all 4
modules with part no. 7441 586.

50

5727 946 v1.2

Faults displayed at the programming unit (continued)

Onlysolarcontrolunitfaultcode

s

ifrequired.

ifrequired.

control

codingaddress“A0”andremot

e

Troubleshooting – Vitotronic 300-K

Fault
code

99992222

99993333

99994444

9999aaaa

9999bbbb

9999cccc

9999ffff

aaaabbbb

bbbb1111

bbbb4444

System characteristics

Control mode
Only solar control unit fault codes
will be displayed

Control operation perhaps DHW
tank cold

Control mode Communication error

Emmissions test mode

Cause Remedy

Collector temp. sensor shorted out,
connects to S1 at the Vitosolic

DHW tank temp. sensor shorted
out, connects to S3 at the Vitosolic

Temp. sensor shorted out, connects
to S2 at the Vitosolic

Collector temp. sensor cable
broken, connects to S1 at the
Vitosolic

DHW tank temp. sensor cable
broken, connects to S3 at the
Vitosolic

Temp. sensor cable broken,
connects to S2 at the Vitosolic

Fault
Solar control unit; displayed if a
fault without fault code occurs at
the solar control unit

DHW tank primary system
configuration error:
Code “55:3” has been set, but plug
aJB is not plugged in (not used)
and/or
Codes “4C:1” and “4E:1” have not
been set

Programming unit

Internal electronics fault Check electronics PCB and replace,

Check solar control unit sensor

Check solar control unit

Insert plug aJB and check the
code (not used).

Check connections and replace
programming unit if required.

bbbb5555
bbbb6666

bbbbaaaa

bbbbcccc

Control mode

Constant mode Invalid hardware recognized Check the control software circuit

Mixing valve “close” Communication error mixing valve

Control mode without remote
control

bbbbdddd

bbbbeeee

bbbbffff

5727 946 v1.2

Control mode Incorrect LON communication

extention PCB

Communication error Vitotrol
remote control, heating circuit A1

Communication error Vitotrol
remote control, heating circuit M2

Communication error Vitotrol
remote control, heating circuit M3

module

board and confirm the coding address:

- Enter coding 2 (see page 80 for
instructions).

- Change code 8A to 176.

- Confirm coding 92:186

Check PCB and replace, if required.

Check connections, lead/cable,
coding address “A0” and remote
control DIP switches.

Replace the communication module.

51

Troubleshooting – Vitotronic 300-K

Faults displayed at the programming unit (continued)

Fault
code

cccc2222

cccc4444

CCCCcccc5555

cccceeee

ccccffff

dddd6666

dddd7777

dddd8888

ddddaaaa

ddddbbbb

ddddcccc

dddddddd

ddddeeee

ddddffff

System characteristics

Control mode

Control mode, max. pump speed
(Not used)

Control mode

Control mode without room
influence

Cause Remedy

Cable break KM BUS to solar
control unit.

Communication error with function
extension 0 to 10 V

Communication fault, variable
speed circulation pump, heating
circuit connection set

Communication error Plug-in
adaptor for external safety
equipment

Error
LON communication module

Fault at DE1 in plug-in adaptor for
external safety equipment (not
used)

Fault at DE2 in plug-in adaptor for
external safety equipment (not
used)

Fault at DE3 in plug-in adaptor for
external safety equipment (not
used)

Room temperature sensor shorted
out,
Heating circuit A1

Room temperature sensor shorted
out,
Heating circuit M2

Room temperature sensor shorted
out,
Heating circuit M3

Room temperature sensor cable
broken,
Heating circuit A1

Room temperature sensor able
broken,
Heating circuit M2

Room temperature sensor cable
broken,
Heating circuit M3

Check KM BUS cable and the solar
control unit
Without solar control unit:
Set code “54: 0”

Check connections and
cables/leads; replace the function
extension, if required

Without function extension:
Set code “9d: 0”

Check setting of coding
address ”30” Set to “0” 30:”0”

Check plug-in adaptor for external
safety equipment and cables/leads
Without plug-in adaptor:
Set coding “94: 0”

Replace communication module

Check connections at “DE1” to
“DE3”

Check room temperature sensor

Check the room temperature sensor
and the DIP switch on the Vitotrol

52

5727 946 v1.2

Faults displayed at the programming unit (continued)

Troubleshooting – Vitotronic 300-K

LON participants fault messages

Preconditions:
The control unit must be programmed

as fault manager (code “79:1”)

Fault
code

00001111

to

System characteristics

Control mode A participant, e.g. 12

99998888

99999999

Participant

11112222

Cause Remedy

Download fault code to participant
(Vitotronic 200-H), has
developed a fault
or
There is no connection to the
participant

Fault message active at
Vitocom 300
or
Fault at the Vitocom 300
or
No connection to the Vitocom
300

See the Installation and Service instructions

of the relevant control unit.

- Check coding

- Check LON communication module

- Update participant list

- Carry out a participant check

Check external connections at Vitocom 300

See separate Installation and Service

instructions

- Check coding

- Check LON connection cable

- Update participant list

- Carry out a participant check

5727 946 v1.2

53

Function description – Vitotronic 100, HC1

Boiler temperature control

Brief description

The boiler water temperature is
regulated by controlling a modulating
burner.
The set boiler water temperature
set-point is controlled by Vitotronic
300-K.

Functions

The boiler water temperature is

ecorded separately:

r

Fixed high limit (FHL)
Boiler temperature sensor KTS

(changes in resistance NTC)

Control sequence

Boiler goes cold

(set value 4ºC below set point)
The burner start signal is set to the set
boiler water temperature less (=less

7.2ºF or 4ºC) and the burner starts its
own monitoring program.

Coding addresses which influence the
boiler temperature control

06 (see page 80).
For a description, see the coding
overview.

Upper control limit.
Electronic maximum limit
Setting range: 20 to boiler coding card
default
The maximum boiler water temperature
limit can be adjusted via coding
address 06.

Boiler heats up.
The burner shutdown point is
determined by the switch-off
differential of (=less 14.4ºF or 8ºC)
above set point.

Note:

Value on display shown in K (Kelvin).
1 K = 1.8 Fahrenheit degrees or 1
Celsius degree.

Air bleed program

Note:

lose the gas shut-off valve when

C
operating the air bleed program.

The air bleed program is activated via
coding address 2F:1 (the display shows
EL).
During the air bleed program, the
circulation pump will be alternately
switched ON and OFF for 30 seconds
respectively over a period of 20
minutes.

The burner is switched OFF during the
air bleed program.
The program is automatically
deactivated after 20 minutes, and the
coding address is set to 0.

5727 946 v1.2

54

Cascade control unit

Brief description

Function description – Vitotronic 300-K

The supply temperature is regulated by
starting or stopping the burner or by
starting/stopping individual burners.
The boilers will be controlled to the set
boiler water temperature determined by
the cascade control (stand-alone type
of control).

Subject to the system design, you may
select between one gross calorific
strategy and two net calorific
strategies.

Set supply temperature

The set supply temperature is

termined from

de
the set supply temperature set-point

values of system circuit A1 and
mixing valve circuits M2 and M3,

the set supply temperature values of

additional heating circuits (e.g.
Vitotronic 200-H),

the set DHW temperature and
external demands (e.g. the set

supply temperature defaulted by
coding address 9b or via the Input
Module 0 to 10 V).

The boiler sequence (see page 59) can
be determined via coding 2 and the
boiler sequence selection.

Coding addresses which influence the
cascade control

35 to 3F, 41 to 4F.
For a description, see the coding
overview.

Upper control limit

Electronic maximum system supply
temperature limit.
Setting range: 68 to 26˚ F / 20 to
127˚C.
The maximum supply temperature limit
can be adjusted via coding address 37.
This value must be set no higher than
the lowest value of coding address 06
of all connected Vitotronic 100, HC1.

Lower control range limit

Electronic minimum system supply
temperature limit.
Setting range: 68 to 261˚ F / 20 to
127˚ C.
The minimum supply temperature limit
can be adjusted via coding address 36.

5727 946 v1.2

55

Function description – Vitotronic 300-K

Cascade control (continued)

Control sequence

Stand-alone type of control: Parallel boiler control
(coding 3b : 0 without supply temperature sensor or
coding 3b : 1 with supply temperature sensor)

The cascade control unit defaults the
set boiler water temperature to all
currently active boilers.
Every Vitotronic 100 individually
regulates the dafaulted set
temperature.

The control sequence is subject to the
start-up and shutdown criteria selected
with control strategy (coding address
3C):

Gross calorific strategy.
Net calorific strategy 1.
Net calorific strategy 2.

With supply temperature sensor:

The contro deviation is calculated from
the set supply temperature and the
actual supply temperature to determine
the start-up and shutdown criteria.

Gross calorific strategy (Condensing strategy)

It is the aim of the gross calorific
strategy to operate as many boilers as
possible at the lowest output
(modulation) level.

Start-up criterion

Boilers are started via an output
statement (coding 3d : 1).
An additional boiler will be started
when the currently required output can
also be achieved by the currently active
boiler plus the next boiler in the boiler
sequence (see page 66).

Without supply temperature sensor:
The control deviation is calculated from
the set boiler water temperature and
the estimated average actual boiler
water temperture of the active boiler to
determine the start-up and shutdown
criteria. Only those boilers are taken
into consideration whose boiler circuit
pumps are not switched OFF.

Advantages

Optimum utilization of the

Long burner operating times

Shutdown criterion

The boiler is shut down via a shutdown
integral. The shutdown criterion is met
when the shutdown integral exceeds a
limit set via coding address 46, and the
boiler started last will be shut down.

condensing effect (as many boilers
active as possible)

56

5727 946 v1.2

Cascade control (continued)

Net calorific strategy 1

Function description – Vitotronic 300-K

Conventional boilers are preferably
operated at their upper output range, to
reliably prevent the formation of
condensate due to low return
temperatures.
With net calorific strategy 1, an
additional boiler will only be started if
the maximum output of all currently
active burners is insufficient to achieve
the set supply temperature.
A boiler will be shut down, when the
remaining boiler(s) can achieve the
required output on its/their own.

Start-up criteria

The boiler is started via a start-up
integral.
The start-up criteria is met when the
start-up integral exceeds a limit set via
coding address 45, and the next boiler
in the sequence will be started (see
page 59).

Benefit:
As few boilers as possible are active.

Shutdown criteria

The boiler is shut down via an output
statement (coding 3d: 1).
A boiler is shut down when the
currently required output can be
achieved without the boiler which was
started last.

Net calorific strategy 2

With the net calorific strategy 2, an
additional boiler will only be started if
the maximum output of all currently
active burners is insufficient to achieve
the set supply temperature.
A boiler will be shut down if the burner
was returned to its minimum output
because of a large negative control
deviation, and the output is then still
too high.

Start-up criteria

The boiler is started via a start-up
integral.
The start-up criteria is met when the
start-up integral exceeds a limit set via
coding address 45, and the next boiler
in the sequence will be started (see
page 59).

Benefit:
Long burner operating times

Shutdown criteria

The boiler is shut down via a shutdown
integral. The shutdown criteria is met
when the shutdown integral exceeds a
limit set via coding 46, and the boiler
started last will be shut down.

5727 946 v1.2

57

Function description – Vitotronic 300-K

Cascade control (continued)

Control strategy example

Two boiler system with modulating burners and separate flue gas systems:

Boiler 1: 100% rated output (basic load set to 25%)
Boiler 2: 100% rated output (basic load set to 25%)

Gross calorific strategy (coding 3C: 0)

Start-up Switching OFF

Rated output in %

100

100

200

150

100

Total Boiler 2 Boiler 1

66
25

25

25

0

0

0

Time

Rated output in %

100

66
25

100

25

200

150

100

Total Boiler 2 Boiler 1

25

0

0

0

Net calorific strategy 1 (coding 3C: 1)

Start-up Switching OFF

Rated output in %

100

100

200

150

100

Total Boiler 2 Boiler 1

50
25

50

25

0

0

0

Time

Rated output in %

100

50
25

100

50

200

150

100

Total Boiler 2 Boiler 1

25

0

0

0

Time

Time

58

5727 946 v1.2

Cascade control (continued)

Net calorific strategy 2 (coding 3C: 2)

Start-up Switching OFF

Function description – Vitotronic 300-K

100

50
25

0

100

50

0

200

150

100

Rated output in %

Total Boiler 2 Boiler 1

25

0

Time

Boiler sequence

The boiler sequence is determined by

he boiler sequence selection and the

t
following coding addresses (see also
page 86):
38 Changing the lead boiler and the

boiler sequence.
38: 1 Every 1

month, the boiler with the
burner which has
operated for the shortest
number of hours becomes
lead boiler.

38: 2 After 200 to 20,000 run

hours, the boiler with the
next higher number
(coding address 07 of
Vitotronic 100) becomes
lead boiler.

st

day of the

100

66
25

0

100

25

0

200

150

100

Rated output in %

Total Boiler 2 Boiler 1

25

0

Time

39 Boiler 1, 2, 3 or 4 permanent lead

boiler.

3A Boiler 1, 2, 3 or 4 permanent last

boiler.
41 ECO threshold boiler 1.
42 ECO threshold boiler 2.
43 ECO threshold boiler 3.
44 ECO threshold boiler 4.

Via the ECO threshold, every boiler can
be disabled or enabled subject to the
outdoor temperature. The ECO control
becomes disabled, if the boiler is
required to achieve the set supply
temperature, when enabled boilers
have failed. At least the lead boiler
remains active if all boilers in a system
are disabled by the ECO control.

5727 946 v1.2

59

Function description – Vitotronic 300-K

Heating circuit control

Brief description

The control unit provides control
circuits for one high temperature
(boiler) circuit and two mixing valve
circuits.
The set supply temperature of every
heating circuit results from the outdoor
temperature, the set room temperature,
the operating mode and the heating
curve.
The supply temperature of the system
circuit corresponds to the common
system supply temperature.
The supply temperature of the mixing
valve circuits is regulated by the
stepped opening or closing of the
mixing valves.
The mixing motor control changes the
actuating and pause times subject to
the control difference
(control deviation).

Coding addresses which influence the
heating circuit control

9F,A2 to A7, A9, C3 to C8, F1, F2
For a description, see the coding
overview (see page 86).

Time program

The control unit timer changes in
accordance with the times programmed
in the room heating and DHW heating
program between the heating with
normal room temperature and heating
with reduced room temperature
operating modes.
Every operating mode has its own set
level.

Outdoor temperature

A heating curve must be set up for
matching the control unit to the
building and the heating system.
The heating curve characteristics
determine the set boiler water
temperature subject to outdoor
temperature. An average outdoor
temperature (dampened) is used for
control purposes. This comprises the
actual and the adjusted outdoor
temperature.

Functions

The high temperature (boiler) circuit is
subject to the boiler water temperature
and its control range limits.
The heating circuit pump is the
controlling element. The mixing valve
circuit supply temperature is recorded
by the supply temperature sensor.

5727 946 v1.2

60

Heating circuit control (continued)

Function description – Vitotronic 300-K

Domestic hot water temperature

With priority control:

The set supply temperature will be
set to 32˚F / 0˚C during DHW
heating.
The mixing valve closes, and the
heating circuit pumps are switched
OFF.

Without priority control:

The heating circuit control unit
continues to operate with the same
set value.

Room temperature

In conjunction with remote control and
room temperature input (observe
coding address b0).

Compared to the outdoor temperature,
the room temperature has a greater
influence on the common set supply
temperature. This influence may be
adjusted via coding address b2.
In conjunction with the mixing valve
circuit:
For control differences (actual value
deviation) above 3.6˚F / 2˚C room
temperature, the influence can be
increased again (via coding address b6,
quick heat-up/quick setback).

Quick heat-up:
The set room temperature must be
raised by a minimum of 3.6˚F / 2˚C
by:

Pressing party button
Changing from heating with reduced

temperature to heating with normal

temperature.
Start-up optimisation.
Quick heat-up will stop when the set
room temperature has been reached.

.

Heating circuit pump logic
(economy circuit)

The heating circuit pump is switched
OFF (set supply temperature set to 0˚C /
32˚F), when the outdoor temperature
exceeds the value selected via coding
address A5.

Extended economy circuit

The heating circuit pump is switched
OFF, and the set supply temperature is
set to 32˚F / 0˚C, if:
The outdoor temperature exceeds the

value selected via coding address A6.

The set room temperature is reduced

via coding address A9.

In conjunction with the mixing valve

circuit:
The mixing valve has been closed for
12 minutes (mixing valve economy
function, coding address A7).

Slab curing function

(only in conjunction with a mixing valve
circuit).

Please note:

Four different temperature profiles can
be selected for drying the slab. These
profiles are activated via coding
address F1.

When the slab curing function is
activated, the heating circuit pump of
the mixing valve circuit is switched
ON, and the supply temperature will be
held at the selected profile. After
completion (30 days), the mixing valve
circuit will be regulated automatically
via the set parameters.

System dynamics – mixing valve circuit

(only in conjunction with a mixing valve
circuit)

You can influence the control
characteristics of the mixing valve via
coding address C4.

Central operation

Central operation for all downstream
heating circuits can be programmed via
coding address 7A.
The heating and holiday program then
applies to all heating circuits in the
system.
The programming unit of the other
heating circuits displays central control
when the heating program and holiday
program buttons are activated.
Any set holiday programs in the
heating circuit programming units will
be deleted.

Party and economy buttons on all
control units are without effect.

Frost protection

When the outdoor temperature falls
below 34˚F / 1˚C, a supply
temperature of at least 50˚F / 10˚C
will be safeguarded.
For changes, see coding address A3,
variable frost limit.

Quick setback:
The set room temperature must be
reduced by a minimum of 3.6˚F / 2˚C
by:

Pressing economy button .
Changing from room heating with

normal temperature to heating with

reduced temperature.
Shutdown optimisation.
Quick setback will stop when the set
room temperature has been reached.

5727 946 v1.2

61

Function description – Vitotronic 300-K

Heating circuit control (continued)

Supply temperature control

Differential temperature:
The differential temperature may be
adjusted via coding address 9F; factory
supplied setting 15˚F / 8˚C.

110
230

The differential temperature is that
minimum temperature differential by
which the common supply temperature
should be higher than the currently
required supply temperature of the
mixing valve circuit.

System with only one mixing valve

circuit:
The common set supply temperature
will be automatically held 15˚F / 8˚C
above the set supply temperature of
the mixing valve circuits.

System with high temperature

(boiler) circuits and mixing valve
circuits:
The common set supply temperature
operates in accordance with its own
heating curve. The differential
temperature of 15˚F / 8˚C towards
the set supply temperature of the
mixing valve circuits is set up at the
factory.

Upper control limit

Electronic maximum limit:
Setting range: 34 to 261˚F / 1 to
127˚C.
Changes via coding address C6.

Please note:

The maximum limit is no replacement
for the underfloor heating system
temperature limiter.

87

189

8K

+8K

+20/ 68 -20/-4

Supply temperature °C / °F

Outdoor temperature in °C / °F

A Max. common supply temperature
B Slope = 1.8 high temperature

(boiler) circuit

C Slope = 1.2 mixing valve circuit
D Common supply temperature (at a

differential temperature = 15˚F /
8˚C)

E Minimum common supply

temperature

Lower control range limit

Electronic minimum limit:
Setting range: 34 to 261˚F / 1 to
127˚C.
Changes via coding address C5 (only
effective in standard mode).

Control sequence

Mixing valve circuit

he mixing valve motor will not be

T
activated within the neutral zone
(±2˚F / 1˚C).

62

Supply temperature falls

(set value -2˚F / –1˚C)
The mixing valve motor receives the
open signal.
The signal duration lengthens with an
increasing control differential. The
duration of pauses reduces with an
increasing control differential.

Supply temperature rises

(set value +2˚F / 1˚C)
The mixing valve motor receives the
close signal.
The signal duration lengthens with an
increasing control differential. The
duration of pauses reduces with an
increasing control differential.

5727 946 v1.2

DHW tank temperature control

Brief description

Function description – Vitotronic 300-K

The DHW tank control logic is a
set-point control. It is the result of
starting and stopping the DHW pump.
The switching differential is ±4.5˚F /

2.5˚C.

Functions

Time program

n automatic program or an individual

A
time program may be selected for DHW
heating and the control of the DHW
recirculation pump.
Compared with the space heating
circuit’s heat-up phase, DHW heating
in automatic mode starts 30 minutes
earlier.
The individual time program enables up
to four switching periods per day to be
set via the time switch to control the
DHW heating/heating and the DHW
recirculation pump.
Any DHW tank heating sequence will
be completed, independent of the time
program.

During DHW tank heating, a constant
boiler supply temperature will be set
(36˚F / 20˚C higher than the set DHW
tank temperature, adjustable via coding
address 60) and space heating is
switched OFF (optional DHW tank
priority).

In conjunction with coding address 7F

7F: 1 Detached house:
Automatic mode:

For systems with two or three space
heating circuits, the heating times for
the first of the existing heating
circuits will be applied.

Individual time program:

The switching times for DHW heating
and the DHW recirculation pump
have the same effect on all heating
circuits.

Coding addresses which influence the
DHW tank control

54 to 75, 7F, A2.
For a description, see the coding
overview.

7F : 0 Apartment building:
Automatic mode:

For systems with two or three
heating circuits, the heating times
for the respective heating circuit
will be applied.

Individual time program:

The switching times for DHW heating
can be adjusted separately for each
heating circuit.

DHW priority

With DHW priority (coding A2: 2):

The set supply temperature will be

set to 32˚F / 0˚C while the DHW

tank is being heated.

The mixing valve closes, and the

heating circuit pumps are switched

OFF.
With DHW priority:

The heating circuit control unit

continues to operate with the same

set value.

Frost protection

The DHW tank will be heated to 68˚F /
20˚C, if the DHW temperature falls
below 41˚F / 5˚C.

5727 946 v1.2

Auxiliary functions – DHW heating

This function is activated by providing
a second set DHW temperature via
coding address 58 and activating the

th

DHW phase for DHW heating.

4

Set DHW temperature

The set DHW temperature can be
adjusted between 50 and 140˚F / 10
and 60˚C. The set range can be
expanded to 203˚F / 95˚C via coding
address 56.
You can select the set DHW
temperature at the programming unit of
the control and at every Vitotrol 300
remote control unit (if installed).
You can determine the allocation to
individual heating circuits via coding
address 66.

DHW recirculation pump
It delivers hot water to the draw-off
points at adjustable times. Up to four
control periods can be set at the timer.

Auxiliary circuits

The DHW heating can be disabled or
enabled by changing over the heating
program.

System with DHW tank heating system

The above functions also apply in
conjunction with calorifiers.
Set the following codings:
4C: 1, 4E: 1, 55: 3.
For a description, see the coding
overview.

Systems with Vitosolic

A third DHW temperature set-point can
be programmed via coding address 67.
Reloading suppression will be active
below the set temperature. The DHW
tank is heated only by the solar heating
system.

63

Function description – Vitotronic 300-K

DHW tank temperature control (continued)

Control sequence

Pump delay

The DHW pump continuous operation

(coding 62: 10) after the DHW tank
heating, until:
– the actual temperature is 9˚F / 5˚C

higher than the set DHW
temperature or

– the maximum time delay (adjustable

via coding address 62) has been
reached.

Without the pump time-delay for

DHW tank heating (coding 62: 0).

Coding 55: 0:
DHW heating

The DHW tank goes cold

(set value 4.5˚F / –2.5 ˚C, adjustable
via coding address 59)
The common supply temperature is
adjusted 36˚F / 20˚C higher than the
set DHW (adjustable via coding address

60).

The DHW tank is hot

(set value +4.5˚F / 2.5˚C)
The common set supply temperature is
returned to the weather-compensated
value.

Coding 55: 1:
Adaptive DHW tank heating

With adaptive DHW tank heating, the
speed of the temperature rise during
DHW heating is taken into account.
Also taken into account is the question
of whether the boiler will be required to
supply heat after the DHW tank has
been heated or whether residual boiler
heat should be transferred to the DHW
tank.
Accordingly, the control unit
determines the burner and DHW
recirculation pump shutdown point to
prevent the set DHW temperature
being substantially exceeded after the
DHW tank has been heated.

Coding 55: 2:
DHW tank temperature control with
2 DHW tank temperature sensors

st

The 1

DHW tank temperature sensor
enables the DHW pump, and is
evaluated for stop conditions during

nd

the pump run-on time. The 2

DHW
tank temperature sensor (inside the
cold water inlet) is designed to
prematurely start DHW tank heating
when large quantities of DHW are
drawn off as well as to prematurely
stop DHW tank heating if no DHW is
drawn.

Coding 55: 3:
DHW tank control – DHW heating (for
DHW loading systems only)
The DHW tank goes cold

(set value -4.5˚F / –2.5˚C, adjustable
via coding address 59),
 The common set supply temperature

is adjusted 36˚F / 20˚C higher than
the set DHW temperature (adjustable
via coding address 60).

 The primary DHW pump is switched

ON.

 The three-way mixing valve opens

and then regulates to the defaulted
set value.

 The DHW pump cycles (short term

ON and OFF) until the set supply
temperature has been reached, then
it runs constantly. If, during DHW
tank heating, the actual value stays
below the required set supply
temperature, then the DHW pump
will temporarily cycle again.

The DHW tank is hot

(1stDHW tank temperature sensor:
Actual value ≥ set value
and
2ndDHW tank temperature sensor:
Actual value > set value -2.7˚F /
–1.5˚C)
 The common set supply temperature

is returned to the weather­compensated value;

 The DHW pump:

– is immediately switched OFF, if the

three-way mixing valve is open
or

– is switched OFF after run-on time

adjustable via coding 62.

64

5727 946 v1.2

Components from the parts list

Components – Vitotronic 300-K

The main PCB comprises:

Relays and outputs for controlling .

pumps and actuators.

Slot for power supply unit.

Main PCB low voltage

The main PCB comprises:

onnection plug for sensors,

C

communication connections and
external connections.

Slot for PCB, LON communication

module, programming unit and
Optolink PCB.

Supplementary PCB

When replacing the PCB:

1. Record the coding and adjustments
made at the control unit.

2. Replace the PCB.

3. Set coding 8A: 176, and coding

address 92 to 92: 186.

Mixing valve extension PCB

Mixing valve extension
s

upplementary PCB

This is plugged into the mixing valve
extension PCB.
All data is processed and outputs
(relay) are selected.

Power supply unit PCB

The power supply unit PCB comprises

he low voltage supply for all electronic

t
equipment.

Programming unit

Setting the:

Heating program
Set values
Switching times
Heating curve (slope and shift)
Date
Time
Economy and party mode
Coding

Displaying:

Temperatures
Operating conditions
Faults

Optolink / override test switch
P

CB

The PCB comprises:

Burner standby display
Fault display
Optolink laptop interface
Override switch

Override switch for testing flue gas
with briefly raised boiler water
temperature.

The following functions are triggered in
position h:

Starting all pumps.
Mixing valve in control function.

Front panel with heating circuit

elector keys

s

Display and selection of the heating
circuit.

Programming unit ON / OFF
switch

The programming unit comprises:

Fuse
Mains ON / OFF switch.

The PCB comprises the relay for the

ontrolling the mixing valve motor and

c
the heating circuit pump of the mixing
valve circuits.

5727 946 v1.2

Fuses

F1: 6.3 A (slow), 250 V,

ax. power loss ኢ 2.5 W,

m
to protect the actuators, pumps, and
all electronics.

LON communication module

PCB for data exchange with:

Vitotronic 200-H
Vitocom 300

The communication interruption will be
displayed.

65

Components – Vitotronic 300-K

Components from the parts list (continued)

DHW tank temperature sensor

720

700

680

660

640

620

600

580

560

Resistance in

540

0 20 40 60 80 100
32 68 104 140 176 212

DHW tank temperature in °C / °F

Common supply temperature
sensor (Low-loss header)

760

740

720
700

680

660

640

620
600

580

560
540

Resistance in

0

20 40 60 80 100 120 140

32 68 141 176 212 248 284104

Flow or return temperature in °C / °F

Connection

See page 19.

Check sensor

1. Remove wire from terminal X2.7.

2. Check the sensor resistance of the

plug at terminals 1 and 2 or 2 and 3
(if a second DHW tank temperature
sensor has been connected).

DHW tank

Resistance in ΩΩΩΩ

temperature
in ˚F / ˚C

104 / 40
122 / 50
140 / 60

578
597
616

Connection

See page 16.

Check sensor

1.Remove wire from terminal X2.4.

2.Check the sensor resistance of the

plug at terminals 1 and 2.

3. Compare measurement with the
actual temperature displayed (for
scanning, see page 41).
Check the installation and replace
sensor, if necessary, in case of
severe deviation.

Specification

Protection: IP 32
Permiss. ambient
temperature:
During operation:

32 to 194˚F

0 to +90˚C

During storage and transport:

–4 to 158˚F

–20 to +70˚C

3.Compare measurement with the
actual temperature displayed (for
scanning, see page 41).
Check the installation and replace
sensor, if necessary, in case of
severe deviation.

Specification

Protection: IP 32
Permiss. ambient
temperature:
During operation:

32 to 212˚F

0 to +100˚C
During storage and transport:
–4 to 158˚F
–20 to +70˚C

66

5727 946 v1.2

Components from the parts list (continued)

Outdoor temperature sensor

Components – Vitotronic 300-K

Connection

See page 16.

Check sensor

1. Remove wire from terminal X2.2.

1.

600

580

560

540

520

4.

2.

5.

3.

2. Check the sensor resistance at
terminals 1 and 2 of the plug.

Outdoor
temperature in
˚F / ˚C

14 / -10

32 / 0
68 / 20

3. Disconnect cores from the sensor, if
actual values deviate severely from
the curve, repeat the sensor
measurement and compare with the
actual temperature (for scanning,
see page 41).

4. Depending on the result, replace
cable or outdoor temperature sensor.

5. Scan actual temperature (for
scanning, see page 41).

Specification

Protection: IP 43
Permissible ambient temperature
during operation, storage and
transport:

Resistance
in ΩΩΩΩ

480
500
546

–40 to 158˚F
–40 to +70˚C

500

480

460

440

420

Resistance in

400

-40 -30 -20 -10 0 10 20 30

5727 946 v1.2

-40 -22 -4 14 32 50 68 86

Outdoor temperature in °C / °F

67

Components – Vitotronic 300-K

Fuse

F1 T4 A, 250V

Max. power loss ኢ 1.6W

A1 Power supply module

68

5727 946 v1.2

Mixing valve circuit extension kit

Mixing valve motor

lug in the mixing valve motor

A P

| Mixing valve motor open
~ Mixing valve motor close

B Connect to X1 or X3 on the A4

module

Components – Vitotronic 300-K

Changing the rotational direction

Remove the cover and reinsert 3-pole
plug A turned by 180˚.

Test

The relay test of the control unit moves
the mixing valve to open and close.

Manual mixing motor adjustment

Lift the motorized lever up,
unhook the mixing valve handle and
remove plug A.

For 24V actuators please
refer to instructions supplied
with the actuator.

Specification

Rated voltage: 120 VAC~
Rated frequency: 60 Hz
Power consumption: 4 W
Protection: IP 42
Torque: 3 Nm
Run time from
close to open: 120 sec

5727 946 v1.2

69

Components – Vitotronic 300-K

Installation examples

Mixing valve insert conversion (if required), see mixing valve installation instructions.

Factory supplied

Mixing valve motor rotational direction Change the mixing valve motor rotational

direction for these installation examples

HV

HR

KV

KV Boiler supply
HR Heating return
HV Heating supply

HV

HR

KV

70

5727 946 v1.2

Components – Vitotronic 300-K

Remote control

Vitotrol 200

(with integral room temperature sensor for room temperature feed-back in conjunction with a mixing valve circuit)
Setting of:

Day temperature
Heating program
Economy and party mode

Function changes can be made via coding addresses A0, b0 to b9, C0 to C2, E1, E2 (see coding overview).

Connection

2-wire cable 164ft. / 50m

Room temperature sensor connection

A

Two-wire cable, max. 115 ft. / 35 m
length with a cross-section of 1.5 mm
(AWG 16) copper.

2

}

B

A Wall mounting base for Vitotrol 200
B To control unit A2 terminal aVG
C Separate room temperature sensor

13b

9

C

5727 946 v1.2

71

Components – Vitotronic 300-K

Remote control (continued)

ON

S6

D

1 2 3 4

Specification

Power supply via KM BUS.
Safety class: III
Protection: IP 30
Permiss. ambient
temperature
During operation:

32 to 104˚F

0 to +40˚C

In storage and transport:

–4 to +149˚F
–20 to +65˚C

D Printed circuit board DIP switches

(rear of the top casing)

Remote control
affects

System circuit A1

DIP switch
setting

Factory setting
(Heating circuit
selection
button !)

Mixing valve
circuit M2
(Heating circuit
selection
button ?)

Mixing valve
circuit M3
(Heating circuit
selection
button §)

When connecting a separate room
temperature sensor, set DIP
switch S6.3 to ON.

Set room temperature
setting range:

50 to 96˚F
10 to 30˚C

adjustable between

37 to 73˚F
3 to 23°C
or
63 to 99˚F

17 to 37˚C
via coding address E1.
Setting of the reduced set room
temperature at the control unit.

72

5727 946 v1.2

Components – Vitotronic 300-K

Remote control (continued)

Vitotrol 300

(with integral room temperature sensor for room temperature feed-back in conjunction with a mixing valve circuit)
Setting of:

Normal and reduced temperature
Domestic hot water temperature
Heating program
Holiday program
Switching times
Economy and party mode

Function changes can be made via coding addresses A0, b0 to b9, C0 to C2, E1, E2 and F2 (see coding overview).

A

}

B

A Wall mounting base for Vitotrol 300
B To the control unit A2 terminal aVG
C Separate room temperature sensor

13b

9

C

Connection

2-wire cable 164ft. / 50m.

Room temperature sensor connection

Two-core cable, max. 115ft. / 35 m
length with a cross-section of 1.5 mm
(AWG 16) copper.

2

5727 946 v1.2

73

Components – Vitotronic 300-K

Remote control (continued)

1 2 3 4

RTS

int. ext.

3 2 1

DIP switch
setting

Factory setting

ON

ON

S3

1 2 3 4

ON

1 2 3 4

A

S3

ON

A PCB DIP switches (back of the

remote control)

Remote control
affects

System circuit A1
(Heating circuit
selection
button !)

Mixing valve
circuit M2
(Heating circuit
selection
button ?)

Mixing valve
circuit M3
(Heating circuit
selection
button §)

Specification

Power supply via KM BUS.
Safety class: III
Protection: IP 30
Permiss. ambient

1 2 3 4

temperature:
In use:

32 to 104˚F

0 to +40˚C

In storage and transport:

–4 to+149˚F

–20 to +65˚C
Setting range for
Normal set room temp:

50 to+86˚F

10 to 30˚C
adjustable between

37 to 73˚F

3 to 23˚C

or

63 to 97˚F

17 to 37˚C
via coding address E1
Reduced set room temp:

37 to 97˚F

1 2 3 4

3 to 37˚C

Battery type: Use alkaline

manganese

batteries

type MICRO-

LR03 (AAA) which

do not contain

pollutants

When connecting a separate room
temperature sensor, set DIP
switch S30.3 to ON.

1 2 3 4

ON

74

5727 946 v1.2

Remote control (continued)

Connecting several remote control units

When connecting several remote controls to the control unit, install a terminal box on site.

Version 1

Components – Vitotronic 300-K

C

max.
50ft. / 15m

}

A

A To control unit A2 terminal aVG
B Terminal box (on site)
C Vitotrol 200/300
D Vitotrol 200/300
E Vitotrol 200/300

D

max.

On-site connection via terminal box:

Connect in accordance with the
diagram.

The total length of all KM BUS cables

should be limited to 164ft. / 50m.

E

max.
50ft. / 15m50ft. / 15m

B

5727 946 v1.2

75

Components – Vitotronic 300-K

Remote control (continued)

Version 2

}

A

max. 50ft. / 15m

C D

max.

50ft. / 15m

max. 50ft. / 15m

E

F

B

A To control unit A2 terminal aVG
B Terminal box (on site)
C Vitotrol 200/300
D Vitotrol 200/300
E Vitotrol 200/300
F Further BUS participants

If several remote control units and

additional KM BUS participants are
connected, make the connections via
a terminal box (on-site) as shown in
the diagram.

The total length of all KM BUS cables

should be limited to 164ft. / 50m.

76

5727 946 v1.2

Components – Vitotronic 300-K

Room temperature sensor

The room temperature sensor measures the actual room temperature, if the remote Vitotrol unit cannot be installed in a
suitable location.

600

590

580

570

560

550

540

530

520

510

Resistance in

500

0

5 10 15 20 25 30 35 40

32 41 50 59 68 77 86 95 104

Room temperature in °C / °F

Connection

See page 71 to 76.

Check sensor

1. Disconnect the wires from the

sensor.

2. Check the sensor resistance at
terminals 9 and 13b.

Room temperature
in ˚F / ˚C

50 / 10
59 / 15
77 / 25

3. Compare measurement with the
actual temperature displayed (for
scanning, see page 41).
Check the installation and replace
sensor, if necessary, in case of
severe deviation.

Specification

Protection: IP 30
Permiss. ambient
temperature:
During operation:

32 to 104˚F

0 to +40˚C

In storage and transport:

–4 to +149˚F

–20 to +65˚C

Resistance in ΩΩΩΩ

522
534
557

5727 946 v1.2

77

Components – Vitotronic 300-K

Input Module 0 to 10 V

For external control of the boiler/supply temperature via a 0 to 10VDC signal
30 to 120˚C or 10 to 100˚C
(86 to 248˚F or 50 to 212˚F)
or
to signal reduced mode and regulate a heating circuit pump to a lower speed.

24V

5V

Electronics

F1
50mA
(slow)

L1

N S Ö P 1 2 3 1 2 3

40

120 VAC

A

ON

OFF

157 144 145

fÖ Power connection
aVF 0 to 10VDC input
aVG KM BUS to control unit
aBJ Potential free output contact

DIP switch

1 to 3:
1:
2:
3:
4:
4:

Function

OFF

Switch for pre-set value

ON

Reduced mode – system circuit A1

ON

Reduced mode – mixing valve circuit M2

ON

Reduced mode – mixing valve circuit M3

ON

Pre-set value default 10 to 100˚C / 50 to 212˚F

OFF

Pre-set value default 30 to 120˚C / 86 to 248˚F

B

1 2 3 4

_

+

A Power supply

(provide disconnect if required by
code)

B DIP switch (see table)

Note:
For switches 1 to 3, only one switch may be set to ON.

78

5727 946 v1.2

Resetting codings to the factory setting

2F:0Airbleedprogram/programdisabled

.

1. Press w and rw simultaneously
for approx. two seconds, until the
first two arrows appear in the
display.

2. Press D.

Coding Level 1

Calling up coding level 1

1. Press “9“ + “w“ simultaneously

for approx. 2 seconds.

2. Press “ / ” for the required
coding address, the address flashes.

5. “ ” to confirm. The display briefly
shows “accepted”, and the address
flashes again.

6. “ / ” to select other addresses.

Coding – Vitotronic 100, HC1

3. Press “ ” to confirm.

4. “ / ” for the selected value.

7. Press “9“ + “w“ simultaneously

for approx. 1 second. Coding level 1
is terminated.

Summary

Coding (factory default setting) Possible change

System design

00: 1 No function 00: 0 Boiler control connected to the cascade; this

automatically occurs if 01: 2 has been programmed

System type

01: 1 Single boiler system 01: 2 Multi-boiler system with cascade control

(e.g. Vitocontrol-S, WB2B)

06: *1 Maximum boiler water temperature limit. 06: 20

to
06: *1

Boiler

07: 1 Consecutive boiler number in multi-boiler systems

(in conjunction with coding address 01)

Air bleed / filling

2F: 0 Air bleed program/program disabled.

*1

The factory setting and upper limit is defaulted by the boiler coding card.

07: 2
to
07: 4

2F: 1 Air bleed function enabled
2F: 2 Filling function enabled

Maximum boiler water temperature limit
adjustable from 68˚F to *1 / 20˚C to *1

Consecutive boiler number in multi-boiler systems
(in conjunction with coding address 01)

5727 946 v1.2

79

Coding – Vitotronic 100, HC1

Coding Level 2

Calling up coding level 2

1. Press “w” and “rw”

simultaneously for approx. 2
seconds. until the first two arrows
appear in the display; confirm with

2. Press “ ” to confirm.

3. Press “

coding address, the address flashes.

4. Press “ ” to confirm.

5. “

/ ” for the required

/ ” for the selected value.

6. “

” to confirm. The display briefly
shows “accepted”, and the address
flashes again.

7. “ / ” to select other addresses.

8. Press “w” and “rw”

simultaneously for approx. 1 sec.
Coding level 2 is terminated.

Overall summary

Coding (factory default setting)

System design

00: 1 No function 00: 0 Boiler control included in cascade; this automatically occurs if 01: 2

System type

01: 1 Single boiler system 01: 2 Multi-boiler system with cascade control

Boiler/burner

06: *1 Maximum boiler water

temperature limit

Boiler

07: 1 Consecutive boiler number in

multi-boiler systems
(in conjunction with coding
address 01)

Boiler/burner

11:≠9 No access to the coding

addresses for parameters of the
combustion controller

12: 0 Special function OFF

Always reset to 12:0 if
“possible change” used.

21: 0 No maintenance interval

(operating hours) selected

23: 0 No time interval for burner

service selected

24: 0 The service display is reset 24: 1 Service display (value displayed automatically)

28: 0 No burner interval ignition 28: 1

2E: 0 KM-BUS connection of

power/pump module not
recognized

*1

The factory setting and upper limit is defaulted by the boiler coding card.

Possible change

has been programmed

(e.g. Vitotronic 300-K)

06: 20
to
06: *1

07: 2
to
07: 4

11: 9 Access open to the coding addresses for the parameters of the

12: 1

12: 2

21: 1
to

21:100

23: 1
to
23: 24

to
28: 24

2E: 1 KM-BUS connection of power/pump moduleautomatically recognized.

Maximum boiler water temperature limit adjustable from 68˚F to *1 /
20˚C to *1

Consecutive boiler number in multi-boiler systems
(in conjunction with coding address 01)

combustion controller (see coding address 82).

Special function ON:
During calibration, the control automatically sets the boiler water
temperature to max.
If automatic calibration is initiated, the boiler will not start unless the
temperature falls below 108°F / 42°C (see fault Eb before adjusting).

Number of hours run before the burner is serviced is adjustable from 0
to 100
(each increment = 100h)

Time interval adjustable from 1 to 24 months

Time interval adjustable from 1 to 24 hr. The burner is forced-started
once every 30 sec. within selected time interval.

5727 946 v1.2

80

Coding – Vitotronic 100, HC1

2F:0Airbleedprogram/fillprogramdisabled

Pumpincontrolfunction

80:1Afaultmessageisdisplayed,providingafaulti

s

F5:12Delayofftimeofthecirculationpumpintheheating

(notused)

heatingcircuitconnectionwillbestarted10time

s

Coding 2 (continued)

Coding (factory default setting) Possible change

Boiler

2F: 0 Air bleed program/fill program disabled

32: 0 Signal “External blocking”: acting on the boiler

circuit connection set circulation pump:
Pump in control function

38: 0 Status burner control unit: Operational (no fault) 38: ≠0 Status fault, burner control unit

53: 1 Do not adjust

76: 0 Without cascade communication module 76: 2 With cascade communication module; automatic

80: 1 A fault message is displayed, providing a fault is

active for at least 5 sec

82: 0 Operation with natural gas 82: 1 Operation with LPG (only adjustable if coding

85: 0 Standard mode 85:1 Manual calibration of the combustion controller

88: 0 Temperature display in ºC (Celsius) 88: 1 Temperature display in ºF (Fahrenheit)

F5: 12 Delay off time of the circulation pump in the heating

circuit connection set in heating mode: 12 min
(not used)

F6: 0 Circulation pump in the heating circuit connection is

permanently OFF in operating mode “DHW only”
(not used)

F7: 10 In the “Standby mode”, the circulation pump in the

heating circuit connection will be started 10 times
per day for 10 minutes respectively (not used)

2F: 1 Air bleed program enabled
2F: 2 Filling program enabled
32: 1

to
32: 7

32: 8 Internal circulation pump OFF
32: 9

to
32: 15

80: 0 Immediate fault message
80: 2

to
80: 199

F5: 0 No start delay of the internal circulation pump
F5: 1

to
F5: 20

F6: 1
to
F6: 24

F6: 25 In the “DHW only” operating mode, the internal

F7: 0 In the “Standby mode”, the internal circulation

F7: 1
to
F7: 24

F7: 25 In the “Standby mode”, the internal circulation

No function

No function

recognition

The fault message is issued after a delay that is
adjustable from 10 sec to 995 sec;
1 increment = 5 sec

address 11:9 has been set)

(only adjustable if coding address 11:9 has been
set). The red fault indicator also flashes during cal­ibration. The process has terminated when the red
fault indicator no longer
flashes (after approx. 1 min.).

Note!

Heat generated by the boiler must be dispersed dur­ing manual calibration.

Delay off time of the circulation pump in the
heating circuit connection set adjustable from 1 to
20 min

In the “DHW only” operating mode, the internal
circulation pump will be started 1 to 24 times per
day for 10 minutes respectively

circulation pump is permanently ON

pump is permanently OFF

In the “Standby mode”, the internal circulation
pump will be started 1 to 24 times per day for 10
minutes respectively

pump is permanently ON

5727 946 v1.2

81

Coding – Vitotronic 300-K

Resetting codes into the factory setting

1. Press w and rw simultaneously

for approx. 2 seconds.

2. Press D.
Confirm “Base setting? Yes” with

.
Select “Base setting? Yes” or “Base
setting? No” with or .

Coding Level 1

Calling up coding level 1

1
2
3

Cod. 1

Code 1

1. Press 9 and w simultaneously for
approx. 2 seconds.

2. Select the required coding address
with or ;
the address flashes;
confirm with ,
the value flashes.

Summary

Coding (factory default setting) Possible change

System design

00: 1 System circuit A1,

without DHW heating

Number of boilers

35: 4 4 boilers connected to Vitotronic 300-K 35: 1

00: 2 System circuit A1,

with DHW heating

00: 3 Mixing valve circuit M2,

without DHW heating

00: 4 Mixing valve circuit M2,

with DHW heating

00: 5 System circuit A1 and

mixing valve circuit M2,
without DHW heating

00: 6 System circuit A1 and

mixing valve circuit M2,
with DHW heating

00: 7 Mixing valve circuit M2 and M3,

without DHW heating

00: 8 Mixing valve circuit M2 and M3,

with DHW heating

00: 9 System circuit A1 and

mixing valve circuits M2 and M3,
without DHW heating

00: 10 System circuit A1 and

mixing valve circuits M2 and M3,
with DHW heating

1 to 3 boilers connected to Vitotronic 300-K
to
35: 3

3. Change the value with or ;
confirm with .
The display briefly shows Accepted,
then the address flashes again.
Call up further addresses
with or .

4. Press 9 and w simultaneously for
approx. 1 second.

82

5727 946 v1.2

Coding Level 1 (continued)

Coding (factory default setting) Possible change

Multi-boiler control unit

36: 0 Electronic minimum system supply temperature

limit set to 32˚F / 0˚C

37: 80 Electronic maximum system supply temperature

limit set to 176˚F / 80˚C

Control type

3b: 1 Boiler parallel connection with supply temperature

sensor (LLH)

Control strategy

3C: 0 Gross calorific strategy 2

(see page 57)

36: 1
to
36:127

37: 20
to
37:127

3b: 0 Boiler parallel connection without supply

3C: 1 Net calorific strategy 1

3C: 2 Net calorific strategy 2

Electronic minimum system supply temperature
limit adjustable from 32 to 261˚F / 0 to 127˚C

Electronic maximum system supply temperature
limit adjustable from 68 to 261˚F / 20 to 127˚C

temperature sensor (LLH)

(see page 57)

(see page 57)

Coding – Vitotronic 300-K

5727 946 v1.2

83

Coding – Vitotronic 300-K

circuitpumpandmixingvalve

Coding Level 1 (continued)

Coding (factory default setting) Possible change

General (continued)

77: 5 LON participant number 77: 1

to
77: 99

DHW priority A1/M2/M3

A0: 0 Without remote control A0: 1 With Vitotrol 200

A0: 2 With Vitotrol 300

A2: 2

Summer econ. A1/M2/M3

A5: 5 With heating circuit pump logic function A5: 0 Without heating circuit pump logic function

Supply min. temp. A1/M2/M3

C5: 20 Electronic minimum supply temperature limit:

With DHW tank priority applicable to heating
circuit pump and mixing valve

68˚F / 20˚C

A2: 0 Without DHW tank priority applicable to heating

A2: 1 With DHW tank priority for mixing valve:

A2: 3
to
A2: 15

C5: 1
to
C5:127

LON participant number, adjustable from 1 to 99

Note:
Allocate each number only once.

circuit pump and mixing valve

Mixing valve is closed during DHW heating; heating
circuit pump operates

Do not adjust

Note: for additional information see coding level 2

Min. limit adjustable from 34 to 261˚F / 1 to 127˚C
(limited by boiler coding card); only effective with central
heating with normal temperature

Supply max. temp. A1/M2/M3

C6: 75 Electronic maximum supply temperature limit

176˚F / 80˚C

C6: 10
to
C6:127

Maximum limit adjustable from 50 to 261˚F / 10 to
127˚C (limited by boiler coding card)

84

5727 946 v1.2

Coding Level 2

The summary from page 86 lists all possible coding addresses.

The coding addresses are grouped in

System design

Cod. 00

Multi-boiler control unit

Cod. 35 to 49

General

Cod. 4A to 4F

DHW

Cod. 54 to 75

General

Cod. 76 to 9F

System circuit A1

Cod. A0 to F2

accordance with the adjacent
sequence.

Coding – Vitotronic 300-K

Mixing valve circuit M2

Cod. A0 to F2

Mixing valve circuit M3

Cod. A0 to F2

Calling up coding level 2

1
2
3

Cod. 2

Code 2

Initially the possible coding addresses
A0 to F2 for the system circuit A1 are
scrolled through, then those for mixing
valve circuits M2 and M3, again
starting with coding address A0.

ress w and rw simultaneously

1. P
for approx. 2 seconds;
confirm with .

2. Select the required coding address
with or ;
the address flashes;
confirm with ,
the value flashes.

3. Change the value with or ;
confirm with .
The display briefly shows Accepted,
then the address flashes again.
Call up further addresses
with or .

4. Press w and rw simultaneously
for approx. one second.

5727 946 v1.2

85

Coding – Vitotronic 300-K

Inmulti-boilersystems,whereoneboileri

s

Coding Level 2 (continued)

Overall summary

Coding (factory default setting) Possible change

System design

00: 1 See page 82

Multi-boiler control unit

35: 4 4 boilers connected to Vitotronic 300-K 35: 2

to
35: 3

36: 0 Electronic minimum system supply temperature limit

set to 32˚F / 0˚C

37: 80 Electronic maximum system supply temperature

limit set to 176˚F / 80˚C

38: 0

39: 0 No permanent lead boiler 39: 1

3A: 0 No permanent last boiler 3A: 1

3b: 1 Boiler parallel connection with supply temperature

3C: 0 Gross calorific strategy

3d: 1 Output balance for gross calorific strategy and net

3E: 0 Do not adjust

3F: 0 Without DHW tank priority for common supply

No changing of lead boiler and the boiler sequence

Note:

In multi-boiler systems, where one boiler is
permamently selected as standby boiler, change
that boiler over to become the active boiler only in
longer intervals, e.g. as part of the annually required
system inspection.

sensor (LLH)

(see page 57)

calorific strategy 1

pump

36: 1
to
36:127

37: 20
to
37:127

38: 1 Changing the lead boiler:

38: 2
to
38:200

to
39: 4

to
3A: 4

3b: 0 Boiler parallel connection with supply temperature

3C: 1 Net calorific strategy 1

3C: 2 Net calorific strategy 2

3d: 0 No output statement

3F: 1 With DHW tank priority for common supply pump

2 to 3 boilers connected to Vitotronic 300-K

Electronic minimum system supply temperature
limit adjustable from 32 to 261˚F / 0 to 127˚C

Electronic maximum system supply temperature
limit adjustable from 68 to 261˚F / 20 to 127˚C

Every 1stday of the month, the boiler with the
burner which has operated for the shortest number
of hours, becomes lead boiler

Changing the lead boiler:
After 200 to 20,,000 run hours, the boiler with the
next higher number (coding address 07 of
Vitotronic 100) becomes lead boiler;
1 setting step = 100 run hours

Boiler 1, 2, 3 or 4 is permanent lead boiler

Boiler 1, 2, 3 or 4 is permanent last boiler

sensor (LLH)

(see page 57)

(see page 57)

Note:

Vitotronic 300-K controls only in accordance with
net calorific strategy 2

86

5727 946 v1.2

Coding Level 2 (continued)

Coding (factory default setting) Possible change

General

41: 31 No ECO threshold boiler 1 41:–30

to
41:+30

42: 31 No ECO threshold boiler 2 42:–30

to
42:+30

43: 31 No ECO threshold boiler 3 43:–30

to
43:+30

44: 31 No ECO threshold boiler 4 44:–30

to
44:+30

45: 60 Start-up integral threshold set to

60 Kelvin × minute

46: 10 Shutdown integral threshold set to

10 Kelvin × minute

47: 15 Shutdown differential set to 27˚F / 15˚C 47: 2

48: 35 Do not adjust

49: 40 Do not adjust

4A: 0 Do not adjust
4b: 0 Sensor aJB (not used) not installed 4b: 1 Sensor aJB installed

4C: 0 Connection on plug sÖA1:

Heating circuit pump

4F: 5 DHW. Do not adjust

DHW

54: 0 Without solar control unit

45: 1
to
45:255

46: 1
to
46:255

to
47: 30

4C: 1 Primary pump – DHW tank heating system

54: 1 With Vitosolic 100;

54: 2 With Vitosolic 200;

ECO threshold boiler 1 adjustable
from –22 to +86˚F / –30 to +30˚C

ECO threshold boiler 2 adjustable
from –22 to +86˚F / –30 to +30˚C

ECO threshold boiler 3 adjustable
from –22 to +86˚F / –30 to +30˚C

ECO threshold boiler 4 adjustable
from –22 to +86˚F / –30 to +30˚C

Start-up integral threshold adjustable
from 1 to 255 Kelvin × minute

Note:

If the threshold is exceeded, one boiler or one burner
stage is switched ON

Shutdown integral threshold adjustable
from 1 to 255 Kelvin × minute

Note:

If the threshold is exceeded, one boiler or one burner
stage is switched OFF

Shutdown differential adjustable
from 3.6 to 54˚F / 2 to 30˚C

Note:

One boiler or one burner stage will be switched OFF,
if actual supply temperature exceeds the set supply
temperature by this value

(e.g. temperature sensor T2);
will be recognised automatically

will be recognized automatically (not used)

will be recognized automatically

Coding – Vitotronic 300-K

5727 946 v1.2

87

Coding – Vitotronic 300-K

operatingprogramwithpermanentlynormalroom

operatingprogramwithpermanentlynormalroom

Coding Level 2 (continued)

Coding (factory default setting) Possible change

Multi-boiler control (continued)

DHW (continued)

55: 0 DHW heating,

differential ± 4.5˚F / 2.5˚C

56: 0 Setting range for DHW temperature:

50 to 140˚F / 10 to 60˚C

58: 0 Without auxiliary function for DHW heating 58: 10

59: 0 DHW tank heating:

Start-up point – 2.5˚C / –4.5˚F /
Shutdown point + 2.5˚C / +4.5˚F

5A: 0 No function 5A: 1 Supply temperature demand from DHW tank is

60: 20 During DHW heating, boiler water temperature is

max. 36˚F / 20˚C higher than set DHW temperature

62: 10 Delay off time of DHW pump up to max. 10

minutes

64: 2

During party mode and after external changeover of

55: 1 Adaptive DHW heating active (speed of

temperature rise for DHW tank temperature is taken
into account during DHW heating)

55: 2 DHW tank temperature control with 2 DHW tank

temperature sensors

55: 3 DHW loading heating system

56: 1 Setting range for DHW temperature:

50 to 203˚F / 10 to 95˚C

Observe the max. permissible DHW temperature
Change adjustable high limit on boiler controls

Input of a 2ndset DHW value; adjustable
to
58: 95

59: 1
to
59: 10

60: 10
to
60: 50

62: 0 DHW pump without delay off time

62: 1
to
62: 15

64: 0 No DHW heating, DHW recirculation pump OFF

from 34 to 203˚F / 1 to 95˚C (subject to boiler

coding card)

Note:

The DHW tank is heated to the 2ndset value during

the 4thDHW heating phase

Start-up point adjustable from 2 to 18˚F /

1 to 10˚C below set value

maximum value of system

Difference between common supply temperature

and set DHW temperature is adjustable from 10 to

50˚C / 18 to 90˚F

DHW pump delay off time adjustable from 1 to 15

minutes

temperature:
Enable constant DHW heating and DHW recirculation
pump ON

88

64: 1 DHW heating and DHW recirculation pump acc. to

time program

5727 946 v1.2

Coding Level 2 (continued)

InputofsetDHWvalue:

Vitotrol300remotecontrolunits

67:40WithVitosolic200

:

DHWrecirculationpump:

Coding (factory default setting) Possible change

DHW (continued)

66: 4

67: 40 With Vitosolic 200:

Input of set DHW value:
At programming unit and all installed

3rd DHW set-point 104˚F / 40˚C
Reloading suppression will be active
above set temperature. DHW tank is
heated only by solar heating system.

66: 0 At programming unit
66: 1 At programming unit and remote control – system circuit A1
66: 2 At programming unit and remote control – mixing valve circuit

M2

66: 3 At programming unit and remote control – mixing valve circuit

M3

66: 5 At remote control – system circuit A1
66: 6 At remote control – mixing valve circuit M2
66: 7 At remote control – mixing valve circuit M3
67: 0 Without a 3rdset DHW temperature
67: 1

to
67: 95

Input of a 3rdset DHW set point temperature; adjustable
from 34 to above 203˚F / 1 to above 95˚C (subject to the
boiler coding card of the connected boilers)

Coding – Vitotronic 300-K

68: 8 With 2 DHW tank temperature sensors

(coding 55: 2):
DHW tank heating switch-off point with
set value × 0.8

69: 7 With 2 DHW tank temperature sensors

(coding 55: 2):
DHW tank heating starting point with set
value × 0.7

70: 0 DHW recirculation pump ON acc. to time

program when DHW heating is enabled

71: 0

72: 0 72: 1 OFF during DHW heating to second set value

73: 0 73: 1

75: 0 DHW recirculation pump during economy

DHW recirculation pump:
ON acc. to time program

mode:
ON acc. to time program

68: 2
to
68: 10

69: 1
to
69: 9

70: 1 DHW recirculation pump ON according to time program

71: 1 OFF during DHW heating to first set value
71: 2 ON during DHW heating to first set value

72: 2 ON during DHW heating to second set value

to
73: 6

73: 7 Constantly ON
75: 1 OFF

Factor adjustable
from 0.2 to 1;
1 setting step = 0.1

Factor adjustable
from 0.1 to 0.9;
1 setting step = 0.1

During time program
1x/h ON for five minutes
to
6x/h ON for five minutes

5727 946 v1.2

89

Coding – Vitotronic 300-K

Afaultmessageisissued

,

Automaticdaylightsavingtime

Codingaddresses82to87onlyfeasible

Coding Level 2 (continued)

Coding (factory default setting) Possible change

General

76: 0 Without LON communication module 76: 1 With LON communication module;

will be recognized automatically

77: 5 LON participant number 77: 1

to
77: 99

78: 1 LON communication enabled 78: 0 Disable LON communication

79: 1 Control unit is fault manager 79: 0 Control unit is not fault manager

7A: 0 Without central control of heating

circuits

7b: 1 With LON communication module:

Control unit transmits the time

7E: 0 DO NOT ADJUST 7E: __

7F: 1 Detached house 7F: 0 Multi-occupancy house

80: 6

81: 1

82: 3 Daylight saving time starts:

83: 5 Daylight saving time starts:

84: 7 Daylight saving time starts:

85: 10 Daylight saving time ends:

86: 5 Daylight saving time ends:

87: 7 Daylight saving time ends:

88: 0 Temperature display in ˚C (Celsius) 88: 1 Temperature display in ˚F (Fahrenheit)

89: 0 Do not adjust!

8A:175 Do not adjust!

A fault message is issued,
if a fault is active for at least 30 seconds

Automatic daylight saving time
changeover

Note:

if coding 81: 1 is set.

March

last week of month

last day of week (Sunday)

October

last week of month

last day of week (Sunday)

7A: 1 With central control of:

7A: 2 Mixing valve circuit M2

7A: 3 Mixing valve circuit M3

7b: 0 Do not transmit time

80: 0 Immediate fault message
80:...

to
80:199

81: 0 Manual changeover - daylight saving time

81: 2 Use of a radio clock receiver; recognized automatically (not

81: 3 Accept time via LON

82: 1
to
82: 12

83: 1
to
83: 5

84: 1
to
84: 7

85: 1
to
85: 12

86: 1
to
86: 5

87: 1
to
87: 7

LON participant number, adjustable from 1 to 99

Note:
Allocate each number only once

System boiler circuit A1

Minimum fault duration before displaying a fault message is
adjustable from 10 to 995 seconds;
1 setting step = 5 seconds

used)

January
to
December

Week 1
to
week 5 of selected month

Monday
to
Sunday

January
to
December

Week 1
to
week 5 of selected month

Monday
to
Sunday

5727 946 v1.2

90

Coding – Vitotronic 300-K

8E:4Displayingandacknowledgingfaults:

97:2Outdoortemperatureatsensorconnectedto

Coding Level 2 (continued)

Coding (factory default setting) Possible change

General (continued)

8E: 4 Displaying and acknowledging faults:

At programming unit and all installed Vitotrol
remote control units

90:128 Time constant for calculating adjusted outdoor

temperature:

21.3 hours

91: 0 Without heating program changeover (see page 21)

94: 0 Without plug-in adaptor for external safety

equipment

96: 1 With mixing valve extension printed circuit board 96: 0 Without mixing valve extension printed circuit

97: 2 Outdoor temperature at sensor connected to

control unit will be transmitted via LON BUS to any
connected Vitotronic 200-H

98: 1 Viessmann system number

(in conjunction with monitoring several systems
within one LON system with Vitocom 300)

8E: 0 At programming unit
8E: 1 At programming unit and remote control – system

circuit A1

8E: 2 At programming unit and remote control – mixing

valve circuit M2

8E: 3 At programming unit and remote control – mixing

valve circuit M3

90: 1
to
90:199

91: 1 With heating program changeover (connection via

91: 2 Mixing valve circuit M2
91: 3 System circuit A1 and

91: 4 Mixing valve circuit M3
91: 5 System circuit A1 and

91: 6 Mixing valve circuits M2 and M3
91: 7 All heating circuits (A1, M2, M3)
94: 1 With plug-in adaptor for external safety equipment;

97: 0 No transmission via LON BUS
97: 1 The control unit receives the outdoor temperature

98: 1
to
98: 5

Fast (low values) or slow (high values) matching of
supply temperature subject to set value when
outdoor temperature changes;
1 setting step = 10 minutes

plug aVD):
Changeover affects:
System circuit A1

mixing valve circuit M2

mixing valve circuit M3

will be recognized automatically

board

via LON BUS

System number adjustable from 1 to 5

5727 946 v1.2

91

Coding – Vitotronic 300-K

(Externaldisable/externalmixingvalveclose

)

(Externalmixingvalveopen)inactive

Coding Level 2 (continued)

Coding (factory default setting) Possible change

General (continued)

99: 0 Connection to terminals 2 and 3 in plug aVD

(External disable/external mixing valve close)
inactive

9A: 0

Connection to terminals 1 and 2 in plug aVD
(External mixing valve open) inactive

99: 1 Contact affects:

No function

99: 2 Mixing valve close:

Mixing valve circuit M2

99: 3 No function
99: 4 Mixing valve close:

Mixing valve circuit M3

99: 5 No function
99: 6 Mixing valve close:

Mixing valve circuits M2 and M3

99: 7 No function
99: 8 External disable
99: 9 No function
99: 10 External disable and mixing valve close:

Mixing valve circuit M2

99: 11 No function
99: 12 External disable and mixing valve close:

Mixing valve circuit M3

99: 13 No function
99: 14 External disable and mixing valve close:

Mixing valve circuits M2 and M3

99: 15 No function
9A: 1 Contact affects:

No function

9A: 2 Mixing valve open:

Mixing valve circuit M2

9A: 3 No function

9A: 4 Mixing valve open:

Mixing valve circuit M3

9A: 5 No function

9A: 6 Mixing valve open:

Mixing valve circuits M2 and M3

99: 7 No function

92

5727 946 v1.2

Coding Level 2 (continued)

9b:70Setpointtemperatureforexternaldemand

9C:20MonitoringLONparticipants:

pumpandmixingvalv

e

Coding (factory default setting) Possible change

General (continued)

9b: 70 Set point temperature for external demand

(input aVH) 158˚F / 70˚C

9C: 20 Monitoring LON participants:

When there is no response from a participant,
values defaulted inside control unit continue to be
used for a further 20 min. Only then will a fault
message be triggered.

9b: 0 No default set value
9b: 1

to
9b:127

9C: 0 No monitoring
9C: 5

to
9C: 60

Set value adjustable from 34 to 261˚F /
1 to 127˚C (Min. / max. temperature subject to
boiler coding card)

Time adjustable from 5 to 60 minutes

Coding – Vitotronic 300-K

9d: 0 Without Input Module

0 to 10V

9F: 8 With mixing valve circuit:

Differential temperature 14.4˚F / 8˚C
(only in conjunction with mixing valve circuit)

System circuit/mixing valve circuit

A0: 0 Without remote control A0: 1 With Vitotrol 200

A2: 2

A3: 2 Outdoor temp. below 34˚F / 1˚C:

With DHW tank priority applicable to heating circuit
pump and mixing valve

Heating circuit pump ON
Outdoor temp. above 37˚F / 3˚C:
Heating circuit pump OFF

Note:

For settings below 34˚F / 1˚C pipes outdoor
thermal insulation shell of building can freeze up,
particularly during standby mode, e.g. during
holidays.

9d: 1 With Input Module 0 - 10V;

will be recognized automatically

9F: 0
to
9F: 40

A0: 2 With Vitotrol 300

A2: 0 Without DHW tank priority applicable to heating

A2: 1 With DHW tank priority for mixing valve:

A2: 3
to
A2: 15

A3: –9
A3: –8
A3: –7
A3: –6
A3: –5
A3: –4
A3: –3
A3: –2
A3: –1
A3: 0
A3: 1
A3: 2
to
A3: 15

Differential temperature adjustable from 0 to 72˚F /
0 to 40˚C

circuit pump and mixing valve

Mixing valve is closed during DHW heating; heating
circuit pump operates

Do not adjust

Heating circuit pump
(see back of manual for conversion chart)
ON at OFF at
–10˚C –8˚C
– 9˚C –7˚C
– 8˚C –6˚C
– 7˚C –5˚C
– 6˚C –4˚C
– 5˚C –3˚C
– 4˚C –2˚C
– 3˚C –1˚C
– 2˚C 0˚C
– 1˚C 1˚C

0˚C 2˚C
1˚C 3˚C

to

14˚C 16˚C

5727 946 v1.2

93

Coding – Vitotronic 300-K

Withheatingcircuitpumplogicfunction(economy

Withpumpstopfunction:

Coding Level 2 (continued)

Coding (factory default setting) Possible change

System circuit/mixing valve circuit (continued)

A4: 0 With frost protection A4: 1 No frost protection

Adjustment only possible if coding A3: –9 is set.

Note:

Please observe note regarding coding
address A3.

A5: 5

With heating circuit pump logic function (economy
circuit):
Heating circuit pump OFF, if outdoor temperature
(AT) is 1 K higher than set room temperature (RT
AT > RT

set

+ 1 K

A6: 36 Extended economy function inactive A6: 5

Mixing valve circuit

A7: 0 Without mixing valve economy function A7: 1 With mixing valve economy function

System circuit/mixing valve circuit (continued)

A9: 7

With pump stop function:
Heating circuit pump OFF during set-point value
changes (by changing operating mode or changes
on rotary selector ts or button tm)

A5: 0 Without heating circuit pump logic function

With heating circuit pump logic function:

set

)

A5: 1
A5: 2
A5: 3
A5: 4
A5: 5
A5: 6
A5: 7
to
A5: 15

Heating circuit pump OFF, if

AT > RT
AT > RT
AT > RT
AT > RT
AT > RT
AT > RT
AT > RT

set
set
set
set
set
set
set

+ 5 K
+ 4 K
+ 3 K
+ 2 K
+ 1 K

+ 1 K

– 1 K
to
AT > RT

set

– 9 K
Extended economy function active, i.e. burner and

to
A6: 35

heating circuit pump will be switched OFF, and
mixing valve will be closed at a variable value
which is adjustable between 41 and 95˚F / 5 and
35˚C plus 2˚F / 1˚C.
This value is based on dampened outdoor
temperature, comprising actual outdoor
temperature and a time constant which takes
cooling down of an average building into
consideration.

(extended heating circuit pump logic).
Heating circuit pump also OFF, if mixing valve was
closed longer than 20 minutes.
Heating circuit pump ON:
If mixing valve changes to control mode

or

After DHW tank heating (for 20 minutes)

or

If there is a risk of frost

A9: 0 Without pump stop function
A9: 1

Pump stop function adjustable from 1 to 15

to
A9: 15

94

5727 946 v1.2

Coding – Vitotronic 300-K

Coding Level 2 (continued)

Coding (factory default setting) Possible change

Systems/mixing valve circuit (continued)

b0: 0*1With remote control:

Heating mode/ reduced mode:
With outdoor reset

b1: Do not adjust

b2: 8*1With remote control unit and for heating circuit,

operation with room temperature feed-back must
be programmed:
Room influencing factor 8

b3: 0*1Do not adjust

b5: 0*1With remote control:

Without room temperature dependent heating
circuit pump logic function

b6: 0*1With remote control unit and for heating circuit,

operation with room temperature feed-back must
be programmed:
Without quick heat-up/quick setback

*1

Change coding – for system circuit A1 only for boilers without lower temperature limit – for mixing valve circuit only, if remote control

unit affects this heating circuit.

b0: 1 Heating mode:

With outdoor reset
Reduced mode:
With room temperature feed-back

b0: 2 Heating mode:

With room temperature feed-back
Reduced mode:
With outdoor reset

b0: 3 Heating mode/ reduced mode:

With room temperature feed-back

b2: 0 No room influence

b2: 1

Room influence factor adjustable from 1 to 31
to
b2: 31

Heating circuit pump

b5: 1
b5: 2
b5: 3
b5: 4
b5: 5
b5: 6
b5: 7
b5: 8

ON at RT

OFF at RT

T for ON T for OFF

+4K +5K
+3K +4K
+2K +3K
+1K +2K
+0K +1K

-1K +0K

-2K -1K

-3K -2K

actual

actual

< RT

> RT

set

set

+ 

+ 

T



T



b6: 1 With quick heat-up/quick setback (see page 61)

5727 946 v1.2

95

Coding – Vitotronic 300-K

Coding Level 2 (continued)

Coding (factory default setting) Possible change

Systems/mixing valve circuit (continued)

b7: 0*1With remote control unit and for heating circuit,

operation with room temperature feed-back must
be programmed:
Without start-up optimization

b8:10*1With remote control unit and for heating circuit,

operation with room temperature feed-back must
be programmed:
Heat-up gradient – start-up optimization
10 minutes/ ˚C

b9: 0*1With remote control unit and for heating circuit,

operation with room temperature feed-back must
be programmed:
Without learning start-up optimization

C0: 0*1With remote control:

Without shut-down optimization

C1: 0*1With remote control:

Without shut-down optimization

C2: 0*1With remote control:

Without learning shutdown optimization

Mixing valve circuit

C3:125 Mixing valve operating time:

125 seconds

C4: 1 System dynamics – mixing valve control

characteristics

System circuit/mixing valve circuit (continued)

C5: 20 Electronic minimum supply temperature limit:

68˚F / 20˚C

C6: 75 Electronic maximum supply temperature limit

176˚F / 80˚C

*1

Change coding – for system circuit A1 only for boilers without lower temperature limit – for mixing valve circuit only, if remote control

unit affects this heating circuit.

b7: 1 With start-up optimization:

Max. offset
2 hours 30 minutes

b7: 2 Max. off-set

15 hours 50 minutes

b8: 11
to

Heat-up gradient adjustable from 11 to
255 minutes / ˚C

b8:255

b9: 1 With learning start-up optimization

C0: 1 With shutdown optimization:

Max. off-set 1 hour

C0: 2 Max. off-set 2 hours

C1: 1
to
C1: 12

With shutdown optimization:
Max. off-set from 10 to 120 minutes;
1 setting step = 10 minutes

C2: 1 With learning shutdown optimization

C3: 10

Operating time adjustable from 10 to 255 seconds
to
C3:255

C4: 0
to
C4: 3

Controller responds too quickly (cycles between

open and close):

Select a lower value.

Controller acts too slowly (temperature is not

maintained correctly):

Select a higher value.

C5: 1
to
C5:127

C6: 10
to

Min. limit adjustable from 34 to 261˚F / 1 to 127˚C

(limited by boiler coding card); only effective with

central heating with normal temperature

Maximum limit adjustable from 50 to 261˚F /

10 to 127˚C (limited by boiler coding card)
C6:127

96

5727 946 v1.2

Coding Level 2 (continued)

Normaldaytemperatureisadjustableatremot

e

Coding (factory default setting) Possible change

System circuit/mixing valve circuit (continued)

C8:31*1With remote control unit and for heating circuit,

operation with room temperature feed-back must
be programmed:
Without limiting room influence

d5: 0 External heating program changeover via terminal

X6.1 and X6.2:
Heating program changes to constant operation
with reduced room temperature

E1: 1

With remote control:
Normal day temperature is adjustable at remote
control unit from 50 to 86˚F / 10 to 30˚C

E2: 50 With remote control:

No display correction of actual room temperature

Mixing valve circuit

F1: 0 Slab curing function inactive F1: 1

C8: 1
to

Room influence limit adjustable from 1 to 30 K (1.8
to 54 Fahrenheit degrees)

C8: 30

d5: 1 Heating program changes to constant operation

with normal room temperature

E1: 0 Normal day temperature adjustable from

37 to 74˚F / 3 to 23˚C

E1: 2 from 63 to 99˚F / 17 to 37˚C
E2: 0

to
E2: 49

E2: 51
to
E2: 99

Display correction –9˚F / – 5 ˚C
to
display correction –0.18˚F / – 0.1˚C

Display correction +0.18°F / + 0.1˚C
to
display correction 8.8°F / + 4.9˚C

Slab curing function adjustable in accordance with
to
F1: 5

four optional temperature-time profiles (see

page 101)

Coding – Vitotronic 300-K

Note:

Observe slab curing supplier’s instructions.

Observe local regulations.

Report to be provided by heating contractor must

contain following details:

Heat-up data with their respective supply

temperatures

Max. supply temperature achieved

Operating condition and outdoor temperature

during handover
Function continues after power failure or after
control unit has been switched OFF.
Heating program rrrrwwww will be started, after slab
curing function has been completed or if address is
manually set to 0.

System circuit/mixing valve circuit

F2: 8 Time limit for party mode 8 hours

*1

F2: 0 No time limit for party mode

F2: 1
to

Time limit for party mode adjustable from 1 to
12 hours

*1

*1

F2: 12

*1

Party mode ends automatically with heating program rrrrwwww when system changes over to operation with normal room temperature.

5727 946 v1.2

97

Coding – Vitotronic 300-K

Observethesettingofcodingaddress“A3”.

fromoperationwithreducedroomtemperatureto

FA:50

fromoperationwithreducedroomtemperatureto

FA:50

Coding Level 2 (continued)

Coding (factory default setting) Possible change

System circuit/mixing valve circuit (continued)

F8: –5 Temperature limit for terminating the reduced

mode 23˚F / – 5 ˚C see example on page 99.
Observe the setting of coding address “A3”.

F9: –14 Temperature limit for raising the set temperature

for reduced mode 7˚F / – 14 ˚C, see example on
page 99.

FA: 20 Raising the boiler water setpoint temperature or

the supply setpoint temperature when changing

operation with standard room temperature by
20%.
See example on page 100.

Fb: 30 Duration for raising the boiler water temperature

setpoint or the supply temperature setpoint (see
coding address “FA”) 60 min.
See example on page 100.

F8:+10
to
F8: –60

F8:–61 Function disabled
F9:+10

to
F9: –60

FA: 0
to

Fb: 0
to
Fb: 150

Temperature limit adjustable from +50 to –76˚F /
+10 to –60˚C

Temperature limit adjustable from +50 to –76˚F /
+10 to –60˚C

Temperature rise adjustable from 0 to 50%

Duration adjustable from 0 to 300 min.;
1 increment = 2 min.

98

5727 946 v1.2

Coding Level 2 (continued)

Example 1 (”F8: –5“, “F9: –14”)

20

A

15

°C

10

5

B

Coding – Vitotronic 300-K

Set room temperature in

0

-30

Outdoor temperature in

Example (using factory default settings)

A Set standard room temperature 68°F / 20°C
B Set reduced room temperature 37°F / 3°C
C Temperature limit 7°F / – 14 °C in accordance with

coding address “F9”

D Temperature limit 23°F / – 5 °C in accordance with

coding address “F8”

-25

-20 -15 -10

°C

C

D

-5

0 5

5727 946 v1.2

99

Coding – Vitotronic 300-K

Coding Level 2 (continued)

Example 2 (”FA: 20“, “Fb: 30”)

During the transition from operation with reduced room temperature to
operation with standard room temperature, the boiler water or supply
temperature will be raised in accordance with the selected heating curve.
The boiler water or supply temperature can be automatically increased.
The value and duration of the additional increase of the set boiler water
temperature or supply temperature can be adjusted in coding addresses
”FA” and ”Fb”.

C

60

B

50

°C

40

3030

20

D

10

Boiler / Supply Water

Setpoint Temperature in

A

0

00

6

00

7

00

8

Time in h

Fig. 1 Example (using factory default settings)

A Start of operation with standard room

temperature

B Boiler water / supply temperature

based on selected heating curve

C Boiler water / supply temperature

based on coding address ”FA”:
50°C + 20 % = 60°C

D Duration of operation with raised

boiler water / supply temperature
based on coding address ”Fb”: 60 min.

00

9

100

5727 946 v1.2