Viessmann VITOTRONIC300 Operating instructions

Installation and Service
Instructions
for use by heating contractor
Vitotronic 300, Type GW6B
Weather-compensated boiler and heating circuit control unit
in single boiler or multi boiler systems
VITOTRONIC 300, GW6B
Product may not be exactly as shown
IMPORTANT
Certified as a component
part for Viessmann boilers
5513 463 - 06 03/2015
Read and save these instructions
for future reference.
Please file in Service Binder
General
Vitotronic 300, GW6B Installation and Service
Safety, Installation and Warranty Requirements
Please ensure that these instructions are 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).
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.
WARNING
Installers must follow local regulations with respect to
installation of carbon monoxide detectors. Follow the
Viessmann maintenance schedule of the boiler contained
in this manual.
For a listing of applicable literature,
please see section entitled “Important
Regulatory and Safety Requirements”.
Operating and Service Documentation
Licensed professional heating contractor
The installation, adjustment, service and maintenance
of this equipment must be performed by a licensed
professional heating contractor.
It is recommended that all product documentation such
as parts lists, operating and service instructions be
handed over to the system user for storage.
Documentation is to be stored near boiler in a readily
accessible location for reference by service personnel.
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, shutdown procedure, and
the need for professional service annually before the
heating season begin.
Warranty
Information contained in this and
related product documentation must
be read and followed. Failure to do
so renders the warranty null and void.
Product Information
Vitotronic 300, Type GW6B
For installation in or mounting on Viessmann boilers only.
Applicable to the following control units
2
5513 463 - 06
Order No. Z013557
Serial No. 7542124
Vitotronic 300, GW6B Installation and Service
Table of Contents
Page
General
Safety, Installation and Warranty Requirements..............2
Product Information....................................................2
Safety
About these Instructions.............................................5
For your Safety..........................................................6
Preparing for Installation
Overview of System Example.......................................7
Designations in the Example.........................................7
System Examples........................................................8
Single boiler system...........................................8
Multi boiler system..........................................12
Electrical Connections
Overview of Electrical Connections.............................21
Boiler Control and Junction Box.................................26
Mounting the Control Unit.........................................26
Opening the Control Unit..........................................27
Plugging in the Boiler Coding Card..............................27
Inserting Cables and Applying Strain Relief.................28
Connecting Sensors……………................................…28
Control Power Supply……………..............................…29
Connecting the Burner..............................................30
Connecting Pumps....................................................31
Connecting a Central Fault Massage Facility................34
Connecting Actuators...............................................34
Connection of Low Water Cut-off Device.....................36
Connecting External Safety Equipment……………......…37
Connections to Terminal 151………………………….……38
Provisional Burner Operation.......................................39
Blocking the Boiler Externally/Adding to the Boiler
Sequence................................................................40
External Blocking via Switching Contact......................41
External Demand via Switching Contact......................42
External Demand via 0 – 10V Input……..……...........…43
External “Mixing Valve Closed”/”Mixing Valve Open”....43
External Operating Program Changeover......................44
Power Supply……………….....................................…45
Making the LON Connection………………………….…..…46
Commissioning
Commissioning the System........................................48
Adjusting Coding......................................................49
Connecting the Control Unit to the LON......................50
Setting the Boiler Sequence at the Cascade Control Unit...52
Carrying Out an Actuator Test...................................53
Checking Sensors.....................................................54
Adjusting the Heating Curve……..............................…54
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Service Scans
Calling up the Service Menu......................................57
Leaving the Service Menu..........................................58
Change Passwords……………………………..……...........58
Resetting all Passwords to Factory Settings.................58
Scanning Operating Data...........................................59
Resetting Operating Data...........................................59
Brief Scan...............................................................60
Maintenance Display.................................................61
3
Table of Contents
Vitotronic 300, GW6B Installation and Service
Page
Function Description
Coding Levels
4
Fault Display............................................................62
Boiler System Fault Codes.........................................63
Burner Fault Codes....................................................69
Boiler Water Temperature Control...............................72
Cascade Control Unit................................................72
Heating Circuit Control Unit.......................................77
DHW Tank Temperature Control.................................81
Calling up Coding Levels............................................85
Resetting Coding to their Factory Set Condition............85
Coding Level 1
“General” Group.......................................................86
“Combustion Controller” Group ..................................88
“Boiler” Group..........................................................88
“Cascade” Group......................................................89
“DHW” Group..........................................................91
“Solar” Group...........................................................91
“Heating Circuit...” Group..........................................92
Coding Level 2
“General” Group.......................................................95
“Combustion Controller” Group................................102
“Boiler” Group........................................................103
“Cascade” Group....................................................103
“DHW” Group.........................................................106
“Solar” Group.........................................................108
“Heating Circuit...” Group........................................111
Diagrams
Connection and Wiring Diagram................................117
EA1 Extension........................................................120
Components
Sensors.................................................................121
Extension EA1 Accessory (optional)..........................122
Parts
Parts List – Programming Module..............................123
Parts List – Connection Module................................124
Specification
Specification Vitotronic 300, GW6B.........................125
5513 463 - 06
Troubleshooting
Safety
Vitotronic 300, GW6B Installation and Service
About these 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.
WARNING
Warnings draw your attention to the presence of
potential hazards or important product information.
Indicates an imminently hazardous situation which,
if not avoided, could result in loss of life, serious injury
or substantial product/property damage.
CAUTION
Cautions draw your attention to the presence of
potential hazards or important product information.
Indicates an imminently hazardous situation which,
if not avoided, may result in minor injury or product/
property damage.
IMPORTANT

Helpful hints for installation, operation or maintenance
which pertain to the product.
This symbol indicates that additional, pertinent
information is to be found.
5513 463 - 06
This symbol indicates that other instructions must
be referenced.
5
Safety
Vitotronic 300, GW6B Installation and Service
For your Safety
Follow these safety instructions closely to avoid the risk
of injury and damage to property.
H Operation
Before operating the boiler, make sure you fully
understand its method of operation. Your heating
contractor should always perform the initial start-up
and explain the system. Any warranty is null and void
if these instructions are not followed.
H Flue gas smell
- Deactivate heating equipment.
- Open windows and doors.
- Inform your heating contractor.
H Working on the equipment
All personnel working on the equipment or the heating
system must have the proper qualifications and hold
all necessary licenses. Ensure main power to
equipment, heating system, and all external controls
has been deactivated. Close main gas supply valve.
Take precautions in all instances to avoid accidental
activation of power during service work.
H Dangerous conditions
- Deactivate main power immediately.
- Close gas supply valve.
H Maintenance and cleaning
Regular inspection and service by a qualified heating
contractor is important to the performance of the boiler.
Neglected maintenance impacts on warranty; regular
inspection ensures clean, environmentally friendly and
efficient operation. We recommend a maintenance
contract with a qualified heating contractor.
H Technical documentation
- Installation Instruction and Service Instructions
- Operating Instructions and User’s Information Manual
Additional applicable literature:
- Accessory manuals
6
If you smell gas
H Don’t smoke! Don’t use naked flames or cause sparks
(e.g. by switching lights or electrical appliances on
and off)
H Open windows and doors
H Close the gas shut-off valve
H Inform your heating engineers/service contractors from
outside the building
H Observe the safety regulations of your gas supply
company (see gas meter) and those of your heating
engineers (see start-up or instruction report).
In emergencies
H Immediately switch off the power supply, e.g. at the
separate fuse or power supply disconnect switch
(unless there is a smell of gas).
H Close the shut-off valves in the oil pipes or close the
gas shut-off valve, whichever applicable.
H Use suitable extinguishers in the event of fire.
Installation of additional components
The installation of additional components which have not
been tested together with the boiler can adversely affect
the function and performance of the boiler.
Our warranty does not cover and we accept no liability
for damage attributable to the installation of such
components.
Boiler room conditions
H Do not use a room in which the air is polluted by
halogenated hydro-carbons (e.g. as contained in
aerosols, paints, solvents and cleaning agents)
H Do not use a room subject to high levels of dust
H Do not use a room subject to permanently high humidity
H The room should be frost-protected
H Max. ambient temperature 95°F (35°C).
H Provide good ventilation and do not close or obstruct
vents (if installed).
This symbol indicates a reference to other instructions
which must be observed.
5513 463 - 06
CAUTION
Vitotronic 300, GW6B Installation and Service
Preparing for Installation
Overview of System Example
This system example is merely a GENERIC LAYOUT
and must therefore be checked on site for completeness
and function.
The heating circuits must be regulated by an external
control unit.
Connect three-phase consumers via additional
contactors.
5513 463 - 06
Designations in the System Example
7
Preparing for Installation
Vitotronic 300, GW6B Installation and Service
System Examples
ID: 4800078_1407_01
Single boiler system
8
5513 463 - 06
Note: This schematic is a general example without shutoff
valves or safety equipment. This does not replace
the need for local engineering.
Vitotronic 300, GW6B Installation and Service
System Examples
Preparing for Installation
(continued)
Required Devices
ID: 4800078_1407_01
Position Equipment
Boiler
1
Vitotronic 300 GW6B
2
Outdoor temperature sensor ATS
3
Boiler temperature sensor KTS (connection to burner control)
4
5
wT
wZ
rR
6
7
8
9
qP
qW
qE
qQ
qE
qZ
qR
qZ
qU
qT
qU
uU
wW
wR
eP
eQ
eW
eE
5513 463 - 06
eR
eZ
eU
4
rQ
rW
rE
rR
Neutralization system
Junction box
Burner base
Power switch
DHW
DHW tank temperature sensor STS delivered with Vitotronic 300
DHW pump UPSB
DHW re-circulation pump ZP
Heating circuit I
Heating circuit M2 (heating circuit I)
Mixing valve M2 (heating circuit I)
Strap-on temperature sensor
and
Mixing Valve Actuator M2 (heating circuit I)
Mixing valve adapter 24V
Heating circuit II
Heating circuit M3 (heating circuit II)
Mixing valve M3 (heating circuit II)
Strap-on temperature sensor
and
Mixing valve actuator M3 (heating circuit II)
Mixing valve adapter 24V
Accessories
Compiled fault output
Vitotrol 200A or Vitotrol 300A
Extension EA1:
1 analog input (0 to 10 V) - Specification of the boiler water temperature setpoint
3 digital inputs - Separated External switch the operating status for heating circuits 1 to 3 switchable
(with control for weather-compensated operation)
- External blocking with collective fault
- Error messages
- Brief operation DHW re-circulation pump (for weather-compensated control units)
1 switching output (floating changeover contact)- Control system pump to a substation
- Signal reduced mode for one heating circuit external hook
- External demand
- External blocking / mixer to close
- External heating program changeover / mixer on site
KM BUS distributor, with several KM BUS participants
KM BUS subscriber: - Extension EA1
- Vitotrol 200A, 300A
LON communication module to communicate with the following components:
Vitotronic 200-H (for controlling additional heating circuits)
Vitocom 100, type LAN1 with communication module
Power switch on site / main disconnect
9
Preparing for Installation
10
(continued)
5513 463 - 06
System Examples
Vitotronic 300, GW6B Installation and Service
Preparing for Installation
Vitotronic 300, GW6B Installation and Service
System Examples
(continued)
5513 463 - 06
ID: 4800078_1407_01
Group
Coding address
Function
General
00:8
Two heating circuits with mixing valve M2 (heating circuit 2) and
M3 (circuit 3) DHW heating
11
Preparing for Installation
System Examples
Vitotronic 300, GW6B Installation and Service
(continued)
ID: 4800061_1407_01
Multi boiler system
12
5513 463 - 06
Note: This schematic is a general example without shutoff
valves or safety equipment. This does not replace
the need for local engineering.
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
System Examples
Preparing for Installation
(continued)
Required Devices
ID: 4800061_1407_01
Position Equipment
Boiler 1
1
Flue gas damper (for boiler I)
2
Isolation valve
3
Boiler temperature sensor KTS (connection to burner control)
4
Common supply temperature sensor
5
Outdoor temperature sensor ATS
6
Vitotronic 300 GW6B
8
Neutralization system
9
Power switch
rT
Junction box
uW
Burner base
uE
Mixing valve adapter 24V
uZ
Boiler II
qP
Isolation valve
qW
Mixing valve adapter 24V
qQ
Boiler temperature sensor KTS (connection to burner control)
qE
Vitotronic 300 GW6B
qR
Neutralization system
qT
Power switch
rT
Junction box
uR
Burner base
uT
Flue gas damper (for boiler II)
uO
DHW
qZ
DHW tank temperature sensor STS delivered with Vitotronic 300
qU
DHW pump UPSB
qI
DHW re-circulation pump ZP
qO
Heating circuit I
wP
Heating circuit pump M2 (heating circuit I)
wW
Mixing valve M2 (heating circuit I)
wE
Strap-on temperature sensor
wQ
and
Mixing valve actuator M2 (heating circuit I)
wE
Mixing valve adapter 24V
uU
Heating circuit II
wR
Heating circuit pump M3 (heating circuit II)
wZ
Mixing valve M3 (heating circuit II)
wU
Strap-on temperature sensor
wT
and
Mixing valve actuator M3 (heating circuit II)
wU
Mixing valve adapter 24V
uI
Heating circuit III (low-temperature heating circuit)
wI
Heating circuit pump M1 (heating circuit III)
eE
Mixing valve M1 (heating circuit III)
eR
Strap-on temperature sensor
wO
and
Mixing valve actuator M1 (heating circuit III)
eR
Vitotronic 200-H HK1B
eT
and
LON communication module for Pos. 35
and
LON connecting cable
13
Preparing for Installation
System Examples
Vitotronic 300, GW6B Installation and Service
(continued)
Required Devices
ID: 4800061_1407_01
Position Equipment
Outdoor temperature sensor ATS (ATS-value can be taken from Vitotronic 300 GW6B master and cascade
eZ
or
wO
eR
eT
uP
eZ
eP
eQ
eE
rT
eO
rP
rQ
zI
zO
tP
tW
tE
zP
zQ
zW
zE
zE
zU
uP
eT
uQ
14
Heating circuit III (underfloor heating)
Supply temperature sensor M1 (circuit III) delivery Pos. 35
Mixing valve M1 (heating circuit III)
or
Strap-on temperature sensor
and
Mixing Valve Actuator M1 (heating circuit III)
Vitotronic 200-H HK1B
and
LON communication module for Pos. 35
and
LON connecting cable
Outdoor temperature sensor ATS (ATS-value can be taken from Vitotronic 300 GW6B master and cascade
Temperature monitor as Maximum temperature limiter for underfloor heating
- Immersion thermostat or - Contact thermostat
Heating circuit M1 (secondary)
Heating circuit pump M1 (primary)
Power switch on site / main disconnect
Accessories for boilers
Maximum pressure SDB
Minimum pressure switch or limiter SDB
Water level (Low water cutoff) WB
External blocking / Boilers
Switch on boiler as the last in a row
Accessories
Compiled Fault Output
Vitotrol 200A or Vitotrol 300A
KM BUS subscriber: - Extension EA1, AM1
- Vitotrol 200A, 300A
Extension EA1:
1 switching output (floating changeover contact)
- Control system pump to a substation
- Signal reduced mode for one heating circuit
1 analog input (0 to 10 V)
- Specification of the boiler water temperature setpoint
3 digital inputs
- Separated External switch the operating status for heating circuits 1 to 3 switchable
(with control for weather-compensated operation)
- External blocking with collective fault
- Error messages
- Brief operation DHW re-circulation pump (for weather-compensated control units)
external hook-up
- Switch on boiler as the last boiler
- External blocking
KM BUS distributor, with several KM BUS participants
LON communication module to communicate with the following components:
Vitotronic 200-H (for controlling other heating circuits)
Vitocom 100, type LAN1 with communication module
5513 463 - 06
wI
wO
eR
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
System Examples
Preparing for Installation
(continued)
15
Preparing for Installation
16
(continued)
5513 463 - 06
System Examples
Vitotronic 300, GW6B Installation and Service
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
System Examples
Preparing for Installation
(continued)
17
Preparing for Installation
18
(continued)
5513 463 - 06
System Examples
Vitotronic 300, GW6B Installation and Service
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
System Examples
Preparing for Installation
(continued)
19
Preparing for Installation
System Examples
Vitotronic 300, GW6B Installation and Service
(continued)
ID: 4800061_1407_01
coding addresses Vitotronic 300, type GW6B; Lead boiler / Pos. 8
Group
Coding address
Function
General
System Layout
00:8
Two heating circuits with mixing valve M2 (heating
circuit 2) and M3 (circuit 3) DHW heating
Cascade
Number of boilers in cascade
35:2
Number of boilers connected in the heating system
Cascade
Boiler rotation
38:1
Boiler rotation - Monthly
coding addresses Vitotronic 300 Type GW6B Pos. 14
General
LON Participant Number
77:2
LON Participant Number
Boiler
Boiler number in multiboiler system
07:2
Boiler number in multiboiler system
20
General
81:3
The control unit receives time
General
97:1
Control unit receives the outdoor temperature
5513 463 - 06
coding addresses Vitotronic 200-H, type HK1B / Pos. 35
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Overview of Electrical Connections
H Route low voltage leads and line voltage cables
separately.
WARNING
H Strip the insulation from the cables as close to the
terminals as possible, and bundle tightly to the
corresponding terminals.
Incorrect wiring can lead to serious injury from electrical
current and result in appliance damage.
H Secure cables with cable ties.
IMPORTANT
Electronic assemblies can be damaged by static loads.
Prior to commencing work, touch an grounded object
such as a heating or water pipe to discharge static load.
Connections on the low voltage PCB
Plug
Component
!
§/?
%A
%B
5513 463 - 06
)
aJA
aJB
Outdoor temperature sensor
Common supply temperature
sensor
DHW tank temperature sensor
DHW tank temperature sensor
(bottom) in a tank loading
system
Common supply temperature
sensor, low loss header
Return temperature sensor T1
Temperature sensor tank
loading system
Single boiler system
Single boiler control unit
X
Multi boiler system
Cascade control unit Lag boiler control unit
X
--
--
X
--
X
X
--
X
X
--
X
--
--
X
X
X
X
X
--
21
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Overview of Electrical Connections
(continued)
Connections on the low voltage PCB (continued)
Plug
Component
Single boiler system
Single boiler control unit
X
aVD.1/aVD.2 External operating program
changeover
External “mixing valve open”
X
External blocking boiler
-X
aVD.2/aVD.3 External blocking boiler
Start the boiler externally
-as the last one in the boiler
sequence
External “mixing valve close”
X
KM
BUS
participant
X
aVG
(accessory),
e.g. EA1 extension
aVH.2/aVH.3
LON
External demand via switching
contact
LON communication module
for data exchange between
control units, Vitocom and
Vitogate
PCB connections 120V~
Plug
Component
Multi boiler system
Cascade control unit Lag boiler control unit
-------
-X
-X
-X
-X
X
X
--
X
X
X
Single boiler system
Single boiler control unit
--
Multi boiler system
Cascade control unit Lag boiler control unit
X
--
sA
Heating circuit pump for
heating circuit A1 (high temp.)
Primary pump, primary store
system
DHW pump
sK
DHW recirculation pump
X
X
--
sL
Boiler pump or system pump
--
X
X
fÖ
Power supply
X
X
X
fA
Burner
X
X
X
gÖ
Central fault message
X
X
X
gSA1
Motorized isolation valve
Motor, 3-way mixing valve,
tank loading system
External safety equipment
Provisional burner operation
Power supply for accessories
-X
X
X
X
--
X
X
X
X
X
X
X
X
X
sÖA1
aBÖ
aBH
X
X
--
X
X
--
22
sÖ M2/M3
Heating circuit pump
X
X
--
gS M2/M3
Mixing valve motor
X
X
--
5513 463 - 06
Connections on extension for heating circuit with mixing valve HC2/M2, HC3/M3
Plug
Component
Single boiler system
Multi boiler system
Single boiler control unit Cascade control unit Lag boiler control unit
Supply temperature sensor
X
X
-? M2/M3
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Overview of Electrical Connections
5513 463 - 06
Legend
A
Vitotronic control
B
Burner base
C
DIN rail (located in junction box)
gSM2 Mixing valve heating circuit M2
gSM3 Mixing valve heating circuit M3
sÖM2 Pump heating circuit M2
sÖM3 Pump heating circuit M3
sK
DHW recirculation pump
sA
DHW pump
sL
Boiler pump
sÖA1 High temperature heating circuit pump
gSA1 Mixing valve, primary store system
gÖ
Compile fault output
fÖ
Main power supply
aBÖ
Safety circuit connections
aBA
Safety circuit connections
gD
Flue gas damper
F3
3
Fuse 250VAC 6.3A
(continued)
Rated pump and compile fault output 2A~
Note: Maximum output 6FLA shared between all mixing
valve, pump and compile fault outputs.
Note: The 120VAC line out terminals are still live even
when the control is switched off.
23
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Overview of Electrical Connections
(continued)
Note: The DIN terminals can be used with solid, stranded
or stranded with ferrule termination. The ferrule
will help to prevent ‘fraying’ of the standed wires
during installation.
Specific connections are detailed throughout the manual,
refer to the appropriate section prior to making any
connections.
The junction box terminals include a L, N terminal
connection orientated at the top of the junction box
which is pre-wired to the cable harness set, which is
used to connect the Vitotronic control and Burner Base to
the junction box. The L,N,G terminals orientated at the
bottom of the junction box are used to for connections
to external equipment (ie. Pumps, mixing valves, etc).
The individual terminals are a ‘push-in’ design, meaning
to install or release a wire, the orange button must be
pushed in (refer to image below for location of orange
buttons denoted by B), prior to installing or removing
any wires to the terminal.
Top
Legend
A DIN terminal (typical)
B Push-in button
C DIN rail (typical)
D Terminal insertion point
Note: Max. wire gauge 12AWG
Min. wire gauge 26AWG
24
5513 463 - 06
Bottom
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Overview of Electrical Connections
(continued)
Accessing the DIN rail mounted fuse F3
A DIN rail mounted fuse block provides protection to the
120V line out connections as shown on page 23.
When fuse F3 requires replacement, the fuse can be
accessed as shown.
1. Flip down the front portion of the DIN rail mounted
fuse block.
2. Flip down the front side cover of the DIN rail mounted
fuse block.
3. Replace fuse.
5513 463 - 06
4. Return the DIN rail mounted fuse block back to the
original postion..
25
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Boiler Control and Junction Box
1. Install the junction box to the rear panel either right or
left. Secure the junction box with four 4.8 mm metal
screws.
2. Route cables from control through the opening in the
control panel. Guide the cables to the junction box
through the opening in the rear panel and along the
top rail to the control. Secure all cables to the rail with
cable ties.
Note: Never allow cables to come in contact with hot
metal components.
B
C
3. Mount the control to the top front panel.
4. Secure the control to the top front panel with screws.
Note: Screws to secure control are included in
control’s shipping box.
Legend
A Junction box
B Vitotronic control
C Vitocrossal 200 CM2 boiler
Legend
A Cable retaining tab
26
Note: Route the ribbon cable through retainer A.
5513 463 - 06
Mounting the Control Unit
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Opening the Control Unit
Plugging in the Boiler Coding Card
Only use the boiler coding card supplied with the boiler
junction box.
5513 463 - 06
Insert the boiler coding card into slot “X7”, through the
recess in the cover.
Coding card #
Part #
1042
7543216
27
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Inserting Cables and Applying Strain Relief
H Control unit fitted on the boiler:
Route cables from below through the front panel of the
boiler into the wiring chamber of the control unit.
Legend
A Cables with moulded strain relief
B On-site cables; strip up to 4 in. (100 mm) insulation
Connecting Sensors
Connections on the low voltage PCB
2 wire cable, 18 AWG for a maximum length of 120 ft
(36 m)
Component
!
Outdoor temperature sensor
§/?
Common supply temperature sensor
%A
Tank temperature sensor
%B
Tank temperature sensor (bottom)
in a tank loading system
)
Temperature sensor, low loss header
aJA
Return temperature sensor T1
aJB
Temperature sensor tank loading system
Outdoor temperature sensor
Fitting location for outdoor temperature sensor
H North or north-westerly wall, 6 to 8 ft (2 to 2.5 m)
above ground level; in multi storey buildings, in the
upper half of the second floor.
H Not above windows, doors or ventilation outlets.
H Not immediately below balconies or gutters.
H Never cover over.
28
5513 463 - 06
Outdoor temperature sensor connection
Plug
Vitotronic 300, GW6B Installation and Service
Electrical Connections
Control Power Supply
Connecting the power supply to the Vitotronic control
For burner base unit, see boiler service
instructions
Insert plug 40/156 into the corresponding plug of the
burner base.
Route beneath the top B rail in a bundle using plug-in
cable retainers.
Connect plugs fÖ and aBH to the corresponding plugs in
the Vitotronic control unit.
5513 463 - 06
Legend
A To the burner base unit
B Connecting cable
C To the Vitotronic control
29
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connecting the Burner
The burner cables are included in the standard boiler
delivery.
Max. power consumption 3A.
Terminal codes
L1 Phase via external safety equipment (if installed)
to the burner
 Ground conductor to burner
N
Neutral conductor to burner
T1 120V~ from burner control unit
T2 Base load demand
S3 Connection for burner fault
B4 Connection for hours run meter
Insert plug fA and aVG into the corresponding plug of
the burner control.
Route beneath the top B rail in a bundle using plug-in
cable retainers.
30
5513 463 - 06
Legend
A To the Vitotronic control
B To the burner (burner control unit)
C KM BUS cable
Connect plugs fA and aVG to the corresponding plugs in
the Vitotronic control unit.
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connecting Pumps
Available connections
Legend
A Pumps
B To the control unit
Rated voltage
120V~
Rated current Max.
2A~
Note: Maximum output 6FLA shared between all
120V outputs.
Connections on extension for heating circuit with mixing
valve HC2/M2, HC3/M3
Plug
Terminal
Component
5 L, N, G
Heating circuit pump
sÖ M2
6 L, N, G
Heating circuit pump
sÖ M3
Connections on the PCB 120V~
9 L, N, G
sÖA1
Pumps 120V
Available pump connections
5513 463 - 06
sÖM1/A1
sÖM2
sÖM3
sA
sK
sL
Heating circuit 1 pump
Heating circuit 2 pump
Heating circuit 3 pump
DHW pump
DHW recirculation pump
Boiler pump
sA
sK
8
7
sL
10
L, N, G
L, N, G
L, N, G
Heating circuit pump
for heating circuit A1
or
Primary pump,
primary store system
DHW pump
DHW recirculation
pump
boiler pump, system
pump
31
Electrical Connections
Connecting Pumps
Vitotronic 300, GW6B Installation and Service
(continued)
120V pumps with an amperage draw of <2FLA
A Din rail (located in the junction box)
B Pump
32
5513 463 - 06
120V pumps with an amperage draw of >2FLA
Contactor specification 120VAC 1A
A Din rail (located in the junction box)
B Contactor/relay (field supplied)
C Pump
D Power supply w/disconnect and protection
Vitotronic 300, GW6B Installation and Service
Connecting Pumps
Electrical Connections
(continued)
240V pumps
Contactor specification 120VAC 1A
A Din rail (located in the junction box)
B Contactor/relay (field supplied)
C Pump
D Power supply w/disconnect and protection
5513 463 - 06
208/460/575V 3 phase pumps
Contactor specification 120VAC 1A
A Din rail (located in the junction box)
B Contactor/relay (field supplied)
C Pump
D Power supply w/disconnect and protection
33
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connecting a Central Fault Message Facility
Plug gÖ (terminal 11 - L, N, G)
Note: On lag boilers, output gÖ will only be switched
in the case of faults on that boiler.
Rated voltage
120V~
Rated current Max.
2A~
Note: Maximum output 6 FLA shared between all 120V
outputs
Connecting Actuators
1. Disconnect power to control.
2. Connect valve actuator wires to the DIN as shown
(based on desired functionality).
Operating time: 5 to 199 sec. selected via coding
address “40”.
Available connections
gS A1 Motor for 3-way mixing valve, primary store system
gS M2 For heating circuit 2
gS M3 For heating circuit 3
Rated voltage
120V~
Rated current Max.
0.1~/ output
Motor runtime for
3-way mixing valve:
10 to 255 sec, adjustable via
coding addresses “6a” in
the”DHW”group, “c3” in the
heating circuit 2 group and “c3”
in the heating circuit 3 group.
Plug
DIN terminals
52A1
12 (L, N)
52M2
1 (L, N)
52M3
3 (L, N)
13 (L)
2 (L)
Legend
A DIN Rail (in junction box)
B 120V Valve Actuator
C Valve
34
5513 463 - 06
4 (L)
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connecting Actuators
(continued)
Legend
A 24V Mixing Valve Adaptor
B DIN Rail (in junction box)
C 24V Valve Actuator
D Valve
E 120V power to the mixing valve adaptor
24V Valve Adaptor
Rated voltage:
Rated current:
24 VAC
max. 0.15 FLA
1. Disconnect power to control.
2. Remove plug connect gS from cables BK1, BK2 and
BK3 of the 24V valve adaptor
3. Connect BK1, BK2 and BK3 to DIN terminals for
desired valve application. Refer to the chart below.
4. Connect black wire E of the mixing valve adaptor
to an available terminal 14-17 on the DIN rail.
5. Connect valve actuator wires to the adaptor terminals
as shown in image above.
Refer to the mixing valve adaptor Installation
Instructions for additional information.
Operating time: 5 to 199 sec. selected via coding
address “40”.
Available connections
gS A1 Motor for 3-way mixing valve, primary store system
gS M2 For heating circuit 2
gS M3 For heating circuit 3
Plug
DIN terminals
52A1
12 (L, N)
13 (L)
52M2
5513 463 - 06
Motor runtime for
3-way mixing valve:
10 to 255 sec, adjustable via
coding addresses “6a” in
the”DHW”group, “c3” in the
heating circuit 2 group and “c3”
in the heating circuit 3 group.
1 (L, N)
2 (L)
52M3
3 (L, N)
4 (L)
35
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connection of Low Water Cut-off Device
1. Remove jumper between terminals 21(L) and 22(L).
2. Make connection for switching contact at terminal
(LWCO) 21(L) and 22(L).
3. Power supply for low water cut-off device made at an
available terminal 14, 15, 16 or 17 (L, N, G)
CAUTION
The diagram shown is only a simplified conceptual
drawing of a typical low water cut off (LWCO) device.
Refer to the manual specific to the device for
interconnection details.
36
5513 463 - 06
Legend
aBÖ Connection for external equipment.
A Low water cut-off (typical)
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connecting External Safety Equipment
Connection at plug aBÖ.
Note: ‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
1. Remove jumper from terminals 21(L) and 22(L).
2. Make connection of the safety equipment to 21(L)
and 22(L).
Legend
A Low water indicator, minimum pressure limiter
B Maximum pressure limiter
C Further safety equipment
5513 463 - 06
Note: Periphery equipment attached to the aBÖ plug must
be operated on a normally closed circuit.
37
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Connections to Terminal aBA
Low gas pressure switch/external shut-off
1. Remove jumper between terminals 26 (L) and 27(L).
2. Connect auxiliary low gas pressure switch or external
shut-off (dry contact) to terminals 26 (L) and 27(L).
WARNING
The terminals should be used for safety switch-off
purposes only (e.g. through a high limit thermostat).
During switch-off, there is no frost protection of the
heating system and the boiler is not kept at the minimum
boiler water temperature.
Note: The heating system has no frost protection while it
is blocked. The boiler is not held at the lower boiler
water temperature.
Refer to the low gas pressure switch
Installation Instructions
38
5513 463 - 06
Legend
A DIN rail (junction box)
B Auxiliary low gas pressure switch or external shut-off (dry contact)
Vitotronic 300, GW6B Installation and Service
Electrical Connections
Provisional Burner Operation
Remove jumper across terminals 23 (L) and 24 (L) (not
shown) and connect terminals 23 (L) and 25 (L) external
control via dry contact (heat demand on close). Upon heat
demand the boiler will maintain low fire until modulation is
externally controlled through BMS.
Legend
A Dry contact between “TR and ON”
B Din rail (located in junction box)
External modulation via 90 plug (dry contact for
modulation) terminal closure T6 and T8 will drive burner
modulation up and terminal closure T6 and T7 will drive
modulation down.
T6 - Common
T7 - Modulating Down
T8 - Modulating Up
5513 463 - 06
Legend
C To burner interface
Note: Only one contact will be closed at a time. Both
contacts open will hold modulation.
Temperature control is now limited by the electronic high
limit setting in the burner control.
Refer to the “combustion controller” group in
coding for adjustment to maximum boiler water
temperature.
39
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Blocking the Boiler Externally/Adding to the Boiler Sequence
Only for lag boilers
Connection on plug aVD
Note: ‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
Legend
A Blocking the boiler externally
B Start the boiler externally as the last one
in the boiler sequence
Contact
Closed
Open
A
aVD.1/aVD.2
H The boiler is blocked and has been removed
from the boiler sequence.
The boiler is integrated into the current boiler
sequence.
H The motorized isolation valve closes and the
boiler circuit pump stops.
H The other boilers provide the required heating.
Note: If all boilers are blocked or there is no
other boiler ready for operation, then
there will be no frost protection for the
heating system.
40
This boiler is moved from the current position
in the boiler sequence and started as the last
boiler in the sequence.
The boiler is integrated into the current boiler
sequence.
5513 463 - 06
B
aVD.2/aVD.3
Electrical Connections
Vitotronic 300, GW6B Installation and Service
External Blocking via Switching Contact
Plug aVD.2/aVD.3
Only for single boiler and cascade control units
Connection options:
H Plug aVD.2/aVD.3
Note: In the case of cascade control units make the
connection on the EA1 extension.
H EA1 extension (accessory, see page 122)
Contact closed:
H Single boiler system
The boiler is shut down.
Legend
A Floating contact
B Plug aVD of the control unit
H Multi boiler system
Controlled shutdown of the burners on each boiler.
Any connected circuit or system pump is stopped.
Shut-off devices are closed.
Note: The heating system has no frost protection while
it is blocked.
Connection
Note: ‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
EA1 extension
Coding
Plug aVD
With coding “99” set in the “General” group determine
what the input should influence.
Note: Never adjust coding “99:0” in a cascade control
unit.
EA1 extension
Set “5d” (DE1), “5e” (DE2) or “5f” (DE3) in the “General”
group to 3 or 4.
5513 463 - 06
Legend
A Floating contact
B EA1 extension
41
Electrical Connections
Vitotronic 300, GW6B Installation and Service
External Demand via Switching Contact
Only for single boiler and cascade control units
Plug aVH.2/aVH.3
Connection options:
H Plug aVH.2/aVH.3
H EA1 extension (accessory, see page 122)
Contact closed:
146
Legend
A Floating contact
B Plug aVH of the control unit
EA1 extension
H Single boiler system
The burner is switched ON subject to load. The boiler
heats to the set boiler water temperature selected in
coding “9b” in the “General” group.
Limiting the boiler water temperature by means of the
set boiler water temperature and the electronic
maximum limit of the boiler water temperature
(coding “06” in the “Combustion Controller” group)
H Multi boiler system
The burners in each boiler are switched ON subject to
load. They heat to the set supply temperature selected
in coding “9b” in the “General” group.
Limiting the supply temperature by means of the set
supply temperature and the electronic maximum limit
of the supply temperature (coding “37” in the
“Cascade” group)
Connection
Note: ‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
Coding
Plug aVH
No coding change required
42
EA1 extension
Set “5d” (DE1), “5e” (DE2) or “5f” (DE3) in group
“General” to 2.
5513 463 - 06
Legend
A Floating contact
B EA1 extension
Electrical Connections
Vitotronic 300, GW6B Installation and Service
External Demand via 0 –10V Input
Connection at input 0 – 10V to EA1
extension (accessory, see page 122).
Note: Ensure DC separation between the ground
conductor and the negative pole of the on-site
voltage source.
0 –1V
1V
10V
Observe
No default set supply temperature
Set value 50°F (10°C)
Set value 212°F (100°C)
coding “1E” in the “General” group.
Optional setting range
No default set supply temperature
0 –1V
1V
Set value 86°F (30°C)
10V
Set value 248°F (120°C)
Observe coding “1E” in the “General” group.
External “Mixing Valve Closed”/”Mixing Valve Open”
Connection on plug aVD.
Note: ‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
Coding
External “mixing valve open”
With coding “9a” in the “General”group assign the
function to the heating circuits.
External “mixing valve close”
With coding “99” in the “General” group assign the
function to the heating circuits.
5513 463 - 06
Legend
A External “mixing valve open” (floating contact)
B External “mixing valve close” (floating contact)
43
Electrical Connections
Vitotronic 300, GW6B Installation and Service
External Operating Program Changeover
Plug aVD
Only for single boiler and cascade control units
Connection options:
H Plug aVD.1/aVD.2
Note: In the case of cascade control units make the
connection on the EA1 extension.
H EA1 extension (accessory, see page 122)
Legend
A Floating contact
B Plug aVD of the control unit
EA1 extension
The changeover can be achieved separately for heating
circuits 1 to 3.
Connection
Note: ‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
Preselected operating
program
(Contact open)
9
or
w
Legend
A Dry contact (potential free)
B EA1 extension
Central
heating OFF/
DHW OFF
Central
heating OFF/
DHW
heating ON
or
w
Central
heating ON/
DHW
heating ON
Coding
Changed operating
program
(Contact closed)
“d5:0” in
the
“Heating
circuit ...”
group
(Factory
set
condition)
Constant
operation with
reduced
room temperature/
DHW heating OFF
“d5:1” in
the
“Heating
circuit ...”
group
Constant
operation with
standard
room temperature,
DHW heating
in accordance
with coding
“64” in the
“DHW” group
Coding
Plug aVD
This function can be assigned to the heating circuits
at coding “91” in the “General” group.
Note: Never adjust coding “91:0” in a cascade
control unit.
44
5513 463 - 06
EA1 extension
Set “5d” (DE1), “5e” (DE2) or “5f” (DE3) in group
“General” to 1.
This function can be assigned to the heating circuits
at coding “d8” in the “Heating circuit...” group.
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Power Supply
WARNING
If system components are not grounded, serious injury
from electric current can result if an electrical fault
occurs.
Connect the appliance and pipework to the
equipotential bonding of the building in question.
WARNING
Incorrectly executed electrical installations can lead to
injuries from electrical current and result in appliance
damage.
Connect the power supply to the mains filter unit
(part of standard burner delivery).
Isolators for non-grounded conductors
H The mains isolator or “Emergency stop” must
simultaneously isolate from the power supply all
non-grounded conductors.
H We additionally recommend installing an AC/DCsensitive RCD, type B
, for DC (fault) currents
that can occur with energy efficient equipment.
H If no mains isolator or “Emergency stop” is set,
isolate all non-grounded conductors simultaneously
from the power supply by means of an upstream
isolator with a minimum contact separation of 3 mm.
H Connection to the same MCB/fuse provides additional
safety when the power is switched off. Observe the
power consumption of the connected consumers.
Connect the power supply and implement all safety
measures (e.g. RCD circuit) in accordance with local and
national codes.
5513 463 - 06
Legend
A Power supply 120V~
(CM2 - 186, 246, 311 requires 12A)
(CM2 - 400, 500, 620 and 620TX requires 16A)
B Fuse 250VAC 6.3A
C Mains isolator, (on-site)
D Boiler junction box
45
Electrical Connections
Vitotronic 300, GW6B Installation and Service
Making the LON Connection
Connection with Viessmann LON cable
The line may be up to ≤ 23 ft. (7 m) long
Legend
A Control unit or Vitocom
B LON cable, 23 ft. (7 m) long
C Terminator
Connection with Viessmann LON cable and coupling
The Viessmann LON is designed for “Line” BUS topology
with a terminator at both ends (accessories).
Further information can be found in the “Viessmann LON
manual”; see www.viessmann.de/lon.
The transfer distances for LON are subject to the electrical
properties of the respective cable. For this reason, only
use the stated cable types. Use only one cable type
within one LON.
Cable types (on site):
H 2-core cable, CAT5, screened
H JY(St)Y 2 x 2 x 0.8 mm (telephone cable)
Observe the cabling requirements for the operation
of the LON interface FTT 10-A (see www.echelon.com).
All Viessmann appliances are connected with RJ45
connectors. The Viessmann LON always requires
the cores “1” and “2” and the screen. The cores are
interchangeable.
Installation spacing 23 to 69 ft. (7 to 21 m)
46
5513 463 - 06
Legend
A Control unit or Vitocom
B LON cable, 23 ft. (7 m) long
Max. 3 cables between 2 appliances
C Terminator
D LON coupling
Vitotronic 300, GW6B Installation and Service
Making the LON Connection
Electrical Connections
(continued)
Connection with LON cable, on-site cable and LON junction box
≤ 3000 ft.
The line may be up to ≤ 3000 ft. (900 m) (with LON junction boxes)
Legend
A Control unit or Vitocom
B LON cable, 23 ft. (7 m) long
C Terminator
D LON sockets
E On-site cable
F Up to 30 participants
Connection with on-site cable and LON plug
≤ 3000 ft.
The line may be up to ≤ 3000 ft. (900 m)
(with LON plug)
5513 463 - 06
Legend
A Control unit or Vitocom
B On-site cable
C Terminator
D LON plug
E Up to 30 participants
47
Commissioning
Vitotronic 300, GW6B Installation and Service
Commissioning the System
1. Turn ON the ON/OFF switch on all control units.
The commissioning assistant starts automatically.
2. Make required settings:
- “Language”
- “Date / Time”
- “Measuring units”
3. Tap “Application” and select the required application.
- ‘single boiler’
- ‘lead boiler and cascade’
- ‘lag boiler’
4. Confirm with OK until symbol
and “Setup” appear.
5. Important coding can be set during commissioning
(see the following table). For this tap “Yes”.
Note: Flue gas damper coding address 0a is factory
defaulted to 0a:1 (with flue gas damper) when
the application is set ‘lead boiler & cascade’ or
‘lag boiler’.
If a flue gas damper is not used with the boiler,
the coding address must be adjusted to 0a:0.
If the coding address is not adjusted through the
commissioning assistant at the boiler control,
then the burner will check for the presence of
a flue gas damper and then the functionality of
the flue gas damper can only be adjusted through
the burner control.
Single boiler
Weather-compensated single boiler system capable of
controlling DHW production and space heating of one high
temperature heating loop and 2 low temperature heating
loops with mixing valves.
Lead boiler and cascade
Master boiler in a multiboiler system capable of cascading
a maximum of 8 x GW6B equipped CM2 series boilers.
This boiler is responsible for generating system and boiler
setpoints, capable of DHW production and and space
heating of one high temperature heating loop and 2 low
temperature heating loops complete with mixing valves.
Lag boiler
Slave tothe master boiler, and operates on setpoints
generated by the master boiler.
Refer to the burner section of the CM2
Service Instructions
Tap “No” if no further settings are to be made.
6. Confirm with OK.
- Single boiler system
The standard menu appears.
- Multi boiler system
The default display will appear.
Refer to the Operating Instructions
Note: If commissioning was unsuccessful, the following
fault symbol
appears in the footer.
Tap and check the fault messages.
- ‘single boiler’
- ‘lead boiler + cascade’
- ‘lag boiler’
48
5513 463 - 06
If the Vitocrossal 200 CM2 boiler is operated in a multiple
boiler application, a fault message will be displayed during
initial start-up, which indicates that the boiler controller
commissioning process is not yet completed.
Please ackowledge this message and complete the
commissioning process.
Commissioning
Vitotronic 300, GW6B Installation and Service
Commissioning the System
(continued)
Coding are show in the “Setup” menu in the following order:
Function
Group
“Max operational output”
“Combustion controller”
“Gas type”
“Altitude”
“Design”
“System design”
“General”
“Consecutive boiler number in multi boiler systems”
“Boiler”
“Number of boilers connected to the cascade” “Cascade” “Cascade”
“LON participant number”
“General”
“Control strategy”
“Cascade”
Coding
02
03
04
0a
00
07
35
77
3c
Adjusting Coding
Single boiler system
Check all addresses on Coding level 1 and set if required.
Check the following coding on Coding level 2 and set if required.
For steps and overviews on coding, see chapter “Coding”.
Function
“Connection at plug 20A1”
“With LON communication module”
(control unit is fault manager)
“Viessmann system number”
“With LON communication module:
Monitoring LON participants”
Group
“General”
“General”
Coding
4c
79
“General”
“General”
98
9c
Multi boiler system
Check all addresses on Coding level 1 and set if required.
Check the following coding on Coding level 2 and set if required.
For steps and overviews on coding, see chapter “Coding”.
Function
“Single boiler and multi boiler system”
“Connection at plug 29”
“Viessmann system number”
“With LON communication module:
Monitoring LON participants”
5513 463 - 06
“Connection at plug 20A1”
“Connection at plug 29”
“Connection at plug 52A1”
“With LON communication module”
(control unit is fault manager)
“Central control of heating circuits”
“Viessmann system number”
“With LON communication module:
Monitoring LON participants”
“Permanent last boiler”
“Permanent lead boiler”
“Storage tank heating, hysteresis”
Group
On all control units
“Boiler”
“General”
“General”
“General”
Coding
01
4d
98
9c
Only on cascade control units
“General”
“General”
“General”
“General”
4c
4d
4e
79
“General”
“General”
“General”
7a
98
9c
“Cascade”
“Cascade”
“DHW”
3a
39
55
49
Commissioning
Vitotronic 300, GW6B Installation and Service
Connecting the Control Unit to the LON
H The LON communication module is factory installed.
H Vitotronic 200-H:
The LON communication module (accessories) must
be fitted.
Refer to the Installation and Service
Instructions for Vitotronic 200-H
H Within one LON, the same participant number must
not be allocated twice.
H Within one LON, the system number (coding “98”
in the “General” group) must always be the same.
H Only one control unit may be programmed as fault
manager.
H The data transfer via LON can take several minutes.
Example of a single boiler system with Vitotronic 200-H
and Vitocom
A
B
C
D
Single boiler control unit
Vitotronic 200-H
Vitocom
LON
50
A
B
C
Participant no. 1,
Coding “77:1”
Participant no. 10,
Coding “77:10”
Participant no. 99
Control unit is fault manager,
Coding “79:1”
Control unit is not fault manager,
Coding “79:0”
Appliance is fault manager
Control unit transmits the time,
Coding “7b:1”
Control unit receives the time,
Set coding “81:3”
Device receives the time
Control unit sends outdoor
temperature, Coding “97:2”
Control unit receives outdoor
temperature, Set coding “97:1”
--
Viessmann system number,
Coding “98:1”
Viessmann system number,
Coding “98:1”
--
LON participant fault monitoring,
Coding “9c:20”
LON participant fault monitoring,
Coding “9c:20”
--
5513 463 - 06
All coding in the table are listed in the "General" group.
Commissioning
Vitotronic 300, GW6B Installation and Service
Connecting the Control Unit to the LON
(continued)
Example of a multi boiler system
D Vitotronic 200-H
E Vitocom
F LON system
5513 463 - 06
A Lag boiler control unit
B Lag boiler control unit
C Cascade control unit
A
B
C
D
E
Multi boiler system
Set coding “01:2” in
the “Boiler” group
Multi boiler system
Set coding “01:2” in
the “Boiler” group
Multi boiler system
Set coding “01:2” in
the “Boiler” group
--
--
Boiler number 3
Set coding “07:3” in
the “Boiler” group
Boiler number 2
Set coding “07:2” in
the “Boiler” group
Boiler number 1
Set coding “07:1” in
the “Boiler” group
--
--
--
--
Number of connected
boilers Set coding
“35:1” to “35:8” in
the “Cascade” group
--
--
Participant no. 3.
Coding “77:3” in the
“General” group
Participant no. 2.
Set coding “77:2” in
the “General” group
Participant no. 1.
Coding “77:1” in the
“General” group
Participant no. 10.
Coding “77:10” in
the “General” group
Participant no. 99
Control unit is not
fault manager.
Coding “79:0” in the
“General” group
Control unit is not
fault manager.
Coding “79:0” in the
“General” group
Control unit is fault
manager.
Coding “79:1” in the
“General” group
Control unit is not
fault manager.
Coding “79:0” in the
“General” group
Appliance is fault
manager
--
--
Control unit transmits
the time. Coding
“7b:1” in the
“General” group
The control unit
receives the time.
Set coding “81:3” in
the “General” group
Device receives the
time
--
--
The control unit
sends the outdoor
temperature.
Coding “97:2” in the
“General” group
The control unit
receives the outdoor
temperature.
Set coding “97:1” in
the “General” group
--
Viessmann system
number, Coding
“98:1” in the
“General” group.
Viessmann system
number, Coding
“98:1” in the
“General” group.
Viessmann system
number, Coding
“98:1” in the
“General” group.
Viessmann system
number, Coding
“98:1” in the
“General” group.
--
LON participant fault
monitoring Coding
“9c: 20” in the
“General” group
LON participant fault
monitoring Coding
“9c: 20” in the
“General” group
LON participant fault
monitoring Coding
“9c: 20” in the
“General” group
LON participant fault
monitoring Coding
“9c: 20” in the
“General” group
--
51
Commissioning
Vitotronic 300, GW6B Installation and Service
Connecting the Control Unit to the LON
(continued)
Carrying out a LON participant check
The participant check is used to test communication with
the system devices connected to the fault manager.
Preconditions:
H The control unit must be programmed as fault manager
(coding “79:1” in the “General” group).
H The LON participant no. must be programmed in all
control units.
H The LON participant list in the fault manager must be
up to date.
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Service functions”
5. “LON participant check”
The list of all connected LON participants appears.
6. Select participant and start participant check with “OK”.
“Participant ...” appears on the display” Check running”.
Note: During the participant check, the display for the
relevant participant flashes the participant no. for
approx. 1 min. and displays “Wink”.
H Successfully tested participants are designated with “OK”.
H Unsuccessfully tested participants are designated with
“Subscribe ... Check not OK”.
Update the participant list with “New list” in order to
carry out another participant check.
Setting the Boiler Sequence at the Cascade Control Unit
Boiler sequence subject to the coding set in the “Cascade” group and internal control calculations:
Function
Coding
“Lead boiler or boiler sequence changeover”
38
“Permanent lead boiler”
39
“Permanent last boiler”
3a
“ECO threshold boiler”...
41 to 44, 65, 6f, 74, 7d
H Every boiler can be blocked or enabled subject to
outdoor temperature by means of the ECO threshold.
H The ECO threshold has no effect if a boiler is required
to achieve the set supply temperature in the case of
enabled boilers failing.
Tap the following buttons:
1. “Menu”
2. “Boiler sequence”
3. Select the required boiler sequence and confirm with “OK”.
52
5513 463 - 06
H At least the lead boiler remains in operation when all
boilers in a system would otherwise be blocked via the
ECO threshold.
Commissioning
Vitotronic 300, GW6B Installation and Service
Carrying Out an Actuator Test
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Actuator test”
Note: Before an actuator is selected, all actuators are
switched to zero volt.
The actuators listed in the table can be tested at the relay
outputs subject to system equipment level and control
unit configuration (single or multi boiler system).
5513 463 - 06
Display
Explanation
“All actuators”
OFF
All actuators have been switched off.
“Output 20”
ON
Actuator at output sÖ A1
“Output 52”
Open
Actuator at output gS A1
“Output 52”
Neutral
Actuator at output gS A1
“Output 52”
Close
Actuator at output gS A1
“DHW tank primary pump” ON
Actuator at output sA
“DHW circ pump”
ON
Actuator at output sK
“Output 29”
ON
Actuator at output sL
“Central fault message”
ON
Central fault message facility at output gÖ
“Htg circ pump HC2”
ON
Actuator at output sÖ M2
“Mixing valve HC2”
Open
Actuator at output gS M2
“Mixing valve HC2”
Close
Actuator at output gS M2
“Htg circ pump HC3”
ON
Actuator at output sÖ M3
“Mixing valve HC3”
Open
Actuator at output gS M3
“Mixing valve HC3”
Close
Actuator at output gS M3
“EA1 output 1”
ON
Contact “P - S” on plug aBJ of EA1 extension closed.
“AM1 output 1”
ON
Actuator at output A1
“AM1 output 2”
ON
Actuator at output A2
“Solar circuit pump”
ON
“Solar circuit pump” On Solar circuit pump at output sF at solar control
module, type SM1
“Solar circ pump min”
ON
“Solar circ pump min” On Solar circuit pump at output sF at solar control
module, type SM1 set to min. speed.
“Solar circ pump max”
ON
“Solar circ pump min” On Solar circuit pump at output sF at solar control
module, type SM1 set to max. speed.
“SM1 output 22”
ON
Actuator at output sS at solar control module type SM1
Information regarding the mixing valve motor rotational
direction.
The supply temperature must rise when the mixing valve
opens.
If the temperature drops, either the motor is turning in
the wrong direction or the mixing valve set is incorrectly
fitted (observe the mixing valve installation instructions).
53
Commissioning
Vitotronic 300, GW6B Installation and Service
Checking Sensors
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Diagnosis”
5. Select group.
6. Scan actual temperature of the relevant sensor.
Adjusting the Heating Curve
Only for single boiler and cascade control units
The heating curves represent the relationship between
the outdoor temperature and the boiler water or supply
temperature.
Simplified: The lower the outdoor temperature, the higher
the boiler water or supply temperature.
The boiler water or supply temperature in turn affects the
room temperature.
Settings in the factory set condition:
H Slope = 1.4
H Shift = 0
Boiler water or supply
temperature
Slope
Room
set-point
temperature
Outdoor temperature
For outdoor temperature 7°F (−14°C)
54
5513 463 - 06
Legend
A Underfloor heating system, slope 0.2 to 0.8
B Low temperature heating system, slope 0.8 to 1.6
C Heating systems with a boiler water temperature in
excess of 167°F (75°C), slope greater than 1.6
Commissioning
Vitotronic 300, GW6B Installation and Service
Adjusting the Heating Curve
(continued)
Standard set room temperature
Selecting the set room temperature
Individually adjustable for each heating circuit.
The heating curve is offset along the set room
temperature axis. With the heating circuit pump logic
function enabled, the curve modifies the starting and
stopping characteristics of the heating circuit pump.
Changing the standard set room temperature
Refer to the Operating Instructions
Adjustment of the standard set room temperature
from 68 to 79°F (20 to 26°C)
Legend
A Boiler water temperature or supply temperature
B Outdoor temperature
C Set room temperature
D Heating circuit pump “Off”
E Heating circuit pump “On”
Reduced set room temperature
Changing the standard set room temperature
Refer to the Operating Instructions
Adjustment of the reduced set room temperature
from 37 to 52°F (3 to 14°C)
5513 463 - 06
Legend
A Boiler water temperature or supply temperature
B Outdoor temperature
C Set room temperature
D Heating circuit pump “Off”
E Heating circuit pump “On”
55
Commissioning
Adjusting the Heating Curve
Vitotronic 300, GW6B Installation and Service
(continued)
Changing the slope and shift
Individually adjustable for each heating circuit.
Boiler water or
supply temperature
From the home screen tap the following buttons:
1. Tap “Menu”.
2. “Heating circuit 1”, “Heating circuit 2” or “Heating
circuit 3” as the required heating circuit
3. Heating.
4. “Heating curve”
5. +/– for the required value for “Slope” or “Shift”
Legend
A Changing the slope
B Changing the shift (vertical parallel offset of the
heating curve)
56
6. Tap OK to confirm
Example: Heating curve setting with slope 1.5:
5513 463 - 06
Outdoor temperature
Service Scans
Vitotronic 300, GW6B Installation and Service
Calling up the Service Menu
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. Select the required menu range.
Note: In the “Diagnosis” menu area submenus are shown
subject to control unit, e.g. “Cascade” will only be
shown for a cascade control unit.
“Service main menu”
“Diagnosis”
“General”
“Cascade”
“DHW”
“Heating circuit 1/2/3”
“Solar energy”
“Short query”
“Reset data”
“Actuator test”
“System configuration”
“Coding level 1”
“Coding level 2”
“History of faults”
“Service functions”
“LON participant check”
“System log”
“Vitocom PIN input”
“Startup”
“The heating system is reset
to the factory state”
“Change passwords”
“Service level”
“Coding level 2”
“Reset all passwords”
“Exit service”
5513 463 - 06
Note: - “Coding level 2” is only displayed if this level
has been enabled: Enter “viexpert” password.
- Tap
to return to the “Service main menu”
57
Service Scans
Vitotronic 300, GW6B Installation and Service
Leaving the Service Menu
From the service main menu tap the following buttons:
1. “Exit service”
2. Confirm “Terminate service?” with OK.
Note: The system exits the service menu automatically
after 30 min.
Change Passwords
In the factory set condition, the following passwords have
been assigned:
H “viservice” for access to the “Service main menu”
H “viexpert” for access to “Coding level 2”
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Change passwords”
5. “Service level” or “Coding level 2”
6. Enter current password.
7. Confirm with OK.
8. Enter new password.
9. Tap OK twice
Resetting all Passwords to Factory Settings
From the home screen tap the following buttons:
1. Request the master password from the Technical
Service at the Viessmann Group.
2. “Menu”
3. “Service”
4. Enter “viservice” password.
5. “Change passwords”
6. “Reset all passwords”
7. Enter master password. This must be requested from
the service hotline.
58
5513 463 - 06
8. Confirm twice with OK.
Service Scans
Vitotronic 300, GW6B Installation and Service
Scanning Operating Data
Operating data can be scanned in various areas
(see “Diagnosis” on page 54).
Operating data on heating circuits with mixing valves and
a solar thermal system can only be scanned if the
relevant components are installed in the system.
For further information on operating data, see chapter
“Brief scan”.
Note: “- - -” appears on the display if a scanned
sensor is faulty.
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Diagnosis”
5. Select required group, e.g. “General”.
Resetting Operating Data
Saved operating data (e.g. hours run) can be reset to 0.
The value "Dampened outdoor temp" is reset to the
actual value.
From the home screen tap the following buttons:
1. "Menu"
2. "Service"
3. Enter "viservice" password.
4. "Diagnosis"
5. "Reset data"
5513 463 - 06
6. Select required value or "All details".
59
Service Scans
Vitotronic 300, GW6B Installation and Service
Brief Scan
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Diagnosis”
5. “Short query”
6. “Code” An overview of brief scans appears with 11
lines and 6 fields.
for the required brief scan in line
with the following tables.
1
2
System schemes 01 to 10
0
0
0
0
3
4
Control unit software version
0
Number of KM BUS participants
4:
5:
0
0
0
0
6:
Connection on
Connection on
0
0
0
0
plug aVD.1/2
plug aVD.2/3
0: Contact open 0: Contact open
1: Contact closed 1: Contact closed
LON subnet address/system number LON node address
0
0
Connection on plug aVD.2/3
SNVT config.
Software version Neuron Chip
Participant number
0: Auto
Communic.
Software version
1: Tool
coproc.
Heating circuit HC1
Heating circuit HC2
Heating circuit HC3
Software version Remote control
Software version
Remote control
Software version Remote control
Remote control
0: Without
Remote control
0: Without
Remote control
0: Without
1: Vitotrol 200A
1: Vitotrol 200A
1: Vitotrol 200A
2: Vitotrol 300A
2: Vitotrol 300A
2: Vitotrol 300A
0
0
0
0
0
0
0
0
Software
0
Software
0
version,
version,
extension
extension
for heating
for heating
circuits 2
circuits 2
and 3 with
and 3 with
mixing valve
mixing valve
Note: The displays in fields 3 and 5 are the same.
7:
8:
9:
10:
11:
60
0
0
0
0
5
6
Software version, programming unit
Appliance identification CU-ID
Software version
Solar control module type SM1
0
0
Software version, Software version,
AM1 extension
EA1 extension
5513 463 - 06
1:
2:
3:
Service Scans
Vitotronic 300, GW6B Installation and Service
Maintenance Display
Set limits in coding “21” and “23” in the “Boiler” group.
Once these values have been reached, “Service” and
appear on the display.
symbol
Tap the following buttons:
1. “Confirm” The footer shows
.
2.
Note: After tapping the following will be displayed
if your heating system has several fault messages
simultaneously:
3. “Service messages”
The service messages appear yellow in a list.
After maintenance has been carried out
Note: If a service is carried out prematurely, set
coding “24:1” in the “Boiler” group to “24:0”.
The selected maintenance coding for hours run
and time intervals restart at 0.
If coding “24” is not reset, “Service” will be
displayed again on the following Monday.
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “Service functions”
5513 463 - 06
5. “Reset service” The set service coding for hours
run and interval restart at 0 and coding “24” in
the “Boiler” group is set to “24:0”.
61
Troubleshooting
Vitotronic 300, GW6B Installation and Service
Fault Display
In the event of a fault, the red fault display flashes at the
and “Fault”.
control unit. The display shows symbol
Note: If a central fault message facility is connected,
this is started.
For an explanation of fault messages, see chapter
“Fault messages”.
Acknowledge fault display
Tap “Close”. The footer shows
.
Note: Any connected central fault message facility stops.
If an acknowledged fault is not remedied, the fault
message will be re-displayed the following day at
07:00 h, and the fault message facility restarts.
Calling up acknowledged fault messages
Tap the following buttons:
1.
Note: After tapping the following will be displayed if
your heating system has several fault messages
simultaneously:
2. “Faults” The fault messages appear in red and in
chronological order in a list.
Calling up fault codes from the fault memory (fault history)
The 10 most recent faults (including those remedied) are
saved and can be scanned. Faults are sorted by date.
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “History of faults”
5. Call up further information in the relevant fault with ?.
62
5513 463 - 06
6. Tap “Reset” to delete the list.
Troubleshooting
Vitotronic 300, GW6B Installation and Service
Boiler System Fault Codes
Displayed
fault code
System characteristics
Cause
Measures
0f
Control mode.
Service “0f” is only displayed in
the fault history.
Service required
Note: After servicing, set code
“24:0”.
10
Operates as if the outdoor
temperature was 32°F (0°C).
Short circuit, outdoor
temperature sensor.
Check outdoor temperature
sensor (see page 121).
18
Operates as if the outdoor
temperature was 32°F (0°C).
Lead break, outdoor temperature
sensor.
Check outdoor temperature
sensor (see page 121).
20
Standalone control unit without
supply temperature sensor
(possibly supply temperature not
high enough)
Short circuit, common supply
temperature sensor
Check the supply temperature
sensor (see page 121).
28
Standalone control unit without
supply temperature sensor
(possibly supply temperature not
high enough)
Lead break, common supply
temperature sensor
Check the supply temperature
sensor (see page 121).
30
H With DHW tank: DHW pump
ON, boiler is maintained at set
tank temperature.
Short circuit, boiler water
temperature sensor
Check boiler water temperature
sensor.
Lead break, boiler water
temperature sensor
Check boiler water temperature
sensor.
H Without DHW tank: Boiler is
regulated by the temperature
controller.
38
H With DHW tank: DHW pump
ON, boiler is maintained at set
tank temperature.
5513 463 - 06
H Without DHW tank: Boiler is
regulated by the temperature
controller.
40
Mixing valve is being closed.
Short circuit, supply temperature
Check supply temperature sensor
sensor, heating circuit with mixing (see page 121).
valve M2 (heating circuit 2).
44
Mixing valve is being closed.
Short circuit, supply temperature
Check supply temperature sensor
sensor, heating circuit with mixing (see page 121).
valve M3 (heating circuit 3).
48
Mixing valve is being closed.
Lead break, supply temperature
Check supply temperature sensor
sensor, heating circuit with mixing (see page 121).
valve M2 (heating circuit 2).
4c
Mixing valve is being closed.
Lead break, supply temperature
Check supply temperature sensor
sensor, heating circuit with mixing (see page 121).
valve M3 (heating circuit 3).
63
Troubleshooting
64
(continued)
Displayed
fault code
System characteristics
Cause
Measures
50
Tank loading pump on:
DHW temperature target =
set supply temperature
Priority control is cancelled.
or
With tank loading system:
Tank heating is started and
stopped via tank temperature
sensor 2.
Short circuit, tank temperature
sensor 1
Check tank temperature
sensor (see page 121).
51
With tank loading system:
Tank heating is started and
stopped via tank temperature
sensor 1.
Short circuit, DHW tank
temperature sensor 2.
Check the DHW tank
temperature sensor
(see page 121).
52
Control mode
Short circuit, supply temperature
sensor low loss header.
Check supply temperature
sensor (see page 121).
58
Tank loading pump on:
DHW temperature target =
set supply temperature
Priority control is cancelled.
or
With tank loading system:
Tank heating is started and
stopped via tank temperature
sensor 2.
Lead break, DHW tank
temperature sensor 1.
Check DHW tank temperature
sensor (see page 121).
59
With tank loading system:
Tank heating is started and
stopped via tank temperature
sensor 1.
Lead break, DHW tank
temperature sensor 2.
Check DHW tank temperature
sensor (see page 121).
5a
Control mode
Lead break, low loss header
supply temperature sensor.
Check supply temperature
sensor (see page 121).
Without supply temperature
sensor:
Set code “52:0” in the “General”
group.
60
Boiler with maximum
temperature, no output
reduction, mixing valve return
temperature control open
Short circuit, temperature
sensor aJA.
Check temperature sensor
(see page 121).
68
Boiler with maximum
temperature, no output
reduction, mixing valve return
temperature control open
Lead break, temperature
sensor aJA.
Check temperature sensor
(see page 121).
Without temperature sensor:
Set coding “4a:0” in the
“General” group.
5513 463 - 06
Boiler System Fault Codes
Vitotronic 300, GW6B Installation and Service
Troubleshooting
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
Boiler System Fault Codes
(continued)
Displayed
fault code
System characteristics
Cause
Measures
70
Shunt pump constantly ON.
With tank loading system:
close 3-way mixing valve;
no DHW heating
Short circuit, temperature
sensor aJB.
Check temperature sensor (see
page 121).
78
Shunt pump constantly ON
With tank loading system:
close 3-way mixing valve;
no DHW heating
Lead break, temperature
sensor aJA.
Check temperature sensor
(see page 121).
Without temperature sensor:
Set code “4b:0” in the
“General” group.
90
Control mode
Short circuit, temperature sensor
/ connection at solar control
module, type SM1.
Check temperature sensor /
(see separate installation and
service instructions).
91
Control mode
Short circuit, temperature sensor
aÖ, connection at solar control
module, type SM1.
Check temperature sensor aÖ
(see separate installation and
service instructions).
92
No solar DHW heating.
Check sensor at the solar control
Short circuit, collector
temperature sensor, connection
unit (see separate installation and
of temperature sensor & at solar service instructions).
control module, type SM1 or
sensor at S1 of the Vitosolic.
93
Control mode.
Short circuit, temperature sensor, Check sensor at the solar control
connection at S3 of the Vitosolic. unit (see separate installation and
service instructions).
94
No solar DHW heating.
Short circuit, DHW tank
Check sensor at the solar control
temperature sensor, connection
unit (see separate installation and
of temperature sensor % at solar service instructions).
control module, type SM1 or
sensor at S2 of the Vitosolic.
65
Troubleshooting
66
(continued)
Displayed
fault code
System characteristics
Cause
Measures
98
Control mode
Lead break, temperature sensor
/, connection at solar control
module, type SM1.
Check temperature sensor /
(see separate installation and
service instructions).
Check coding address “20” in
the “Solar” group.
99
Control mode
Lead break, temperature sensor
aÖ, connection at solar control
module, type SM1.
Check temperature sensor aÖ
(see separate installation and
service instructions).
Check coding address “20” in
the “Solar” group.
9a
No solar DHW heating.
Lead break, collector temperature Check sensor at the solar control
unit (see separate installation and
sensor, connection of
temperature sensor & at solar
service instructions).
control module, type SM1 or
sensor at S1 of the Vitosolic.
9b
Control mode
Lead break, temperature sensor,
Check sensor at the solar control
connection to S3 of the Vitosolic. unit (see separate installation and
service instructions).
9c
No solar DHW heating.
Lead break, DHW tank temperature
sensor, connection of
temperature sensor % at solar
control module, type SM1 or
sensor at S2 of the Vitosolic.
Check sensor at the solar control
unit (see separate installation and
service instructions).
9e
Control mode
No supply rate in solar circuit or
flow rate too low, or temperature
limiter has responded.
Check solar circuit. Acknowledge
fault message (see separate
installation and service
instructions).
9f
Control mode
Fault, solar control module, type
SM1 or Vitosolic
Displayed if a fault occurs at
these devices that has no fault
message in the Vitotronic.
Check solar control unit
(see separate installation
and service instructions).
a7
Control mode
Programming unit fault
Replace the programming unit.
ab
Control mode, DHW tank may be
cold
Tank loading system
configuration fault:
Coding “55:3” in the “DHW”
group has been set, but plug
aJB is not plugged in and/or
codes “4c:1” and “4e:2” in the
“General” group have not been set.
Insert plug aJB and check
codes.
5513 463 - 06
Boiler System Fault Codes
Vitotronic 300, GW6B Installation and Service
Troubleshooting
Vitotronic 300, GW6B Installation and Service
Boiler System Fault Codes
(continued)
Displayed
fault code
System characteristics
Cause
Measures
b1
Control mode
Communication error,
programming unit
Check connections, and replace
the programming unit if required.
b5
Control mode
Internal fault
Check PCB is plugged in
correctly.
b6
Constant mode
Invalid hardware recognition
Check coding address “92” in
the “General” group;
H 161: Single boiler system
H 190: Cascade control unit
5513 463 - 06
H 166: Lag boiler control unit
Note: Coding “8a:176” in the
“General” group must be
set in order for coding
“92” to be able to be
displayed.
b7
Boiler water temperature control
Coding card fault
Plug in or replace the boiler
coding card (see page 25).
ba
Mixing valve close
Communication error, PCB,
extension for heating circuits 2
and 3 with mixing valve.
Check that the PCB and ribbon
cable are plugged in correctly,
and replace PCB if required.
bc
Control mode without
remote control.
Communication error, Vitotrol
remote control unit, heating
circuit without mixing valve A1
(heating circuit 1).
Check connections, lead (see
separate installation and service
instructions) and coding address
“a0” in the “Heating circuit...”
group.
bd
Control mode without
remote control
Communication error, Vitotrol
remote control unit, heating
circuit with mixing valve M2
(heating circuit 2)
Check connections, lead (see
separate installation and service
instructions) and coding address
“a0” in the “Heating circuit...”
group.
be
Control mode without
remote control
Communication error, Vitotrol
remote control unit, heating
circuit with mixing valve M3
(heating circuit 3)
Check connections, lead (see
separate installation and service
instructions)
and coding address “a0” in the
“Heating circuit...” group.
bf
Control mode
No communication via LON
Incorrect LON communication
module.
Replace LON communication
module.
c1
Boiler cools down
External safety equipment at plug Check connection and external
aBÖ.
safety equipment
(see page 36 and 37)
c2
Control mode
Lead break, KM BUS to solar
control module, type SM1 or
Vitosolic.
Check KM BUS cable and
appliance.
Without solar control unit:
Set code “54:0” in the “General”
group.
67
Troubleshooting
68
(continued)
Displayed
fault code
System characteristics
Cause
Measures
c3
Control mode
Communication error, AM1
extension
Check connections.
Without AM1 extension:
Set coding “32:0” in the
“General” group.
cF
Control mode
No communication
via LON.
Communication error, control
unit
LON communication module.
Check LON communication
module and replace if required.
If no LON communication module
is installed, set code “76:0” in
the “General” group.
d3
Control mode
Communication error, extension
EA1.
Check connections (see page
122). Without extension EA1:
Set code “5b:0” in the
“General” group.
d4
Boiler cools down
MCB F2 has responded.
Check MCB F2 and jumper
on plug aBA.
d6
Control mode
Input DE1 at extension EA1
reports a fault.
Remove fault at appliance
concerned.
d7
Control mode
Input DE2 at extension EA1
reports a fault.
Remove fault at appliance
concerned.
d8
Control mode
Input DE3 at extension EA1
reports a fault.
Remove fault at appliance
concerned.
da
Control mode without
room influence.
Short circuit, room temperature
Check room temperature
sensor, heating circuit without
sensor (see page 121).
mixing valve A1 (heating circuit 1).
db
Control mode without
room influence
Short circuit, room temperature
sensor, heating circuit with mixing
valve M2 (heating circuit 2).
Check room temperature
sensor (see page 121).
dc
Control mode without
room influence.
Short circuit, room temperature
sensor, heating circuit with mixing
valve M3 (heating circuit 3).
Check room temperature
sensor (see page 121).
dd
Control mode without
room influence.
Lead break, room temperature
sensor, heating circuit without
mixing valve A1 (heating circuit 1).
Check room temperature
sensor (see page 121).
de
Control mode without
room influence.
Lead break, room temperature
sensor, heating circuit with mixing
valve M2 (heating circuit 2).
Check room temperature
sensor (see page 121).
df
Control mode without
room influence.
Lead break, room temperature
sensor, heating circuit with mixing
valve M3 (heating circuit 3).
Check room temperature
sensor (see page 121).
5513 463 - 06
Boiler System Fault Codes
Vitotronic 300, GW6B Installation and Service
Troubleshooting
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
Burner Fault Codes
Displayed
fault code
System characteristics
Cause
Measures
d1
Boiler cools down
Burner fault
Check the burner.
d5
Boiler ramps to the electronic
maximum boiler water
temperature limit.
No communication between
boiler circuit and cascade
control unit
Check communication by
means of a participant check.
E1
Burner control unit in a fault
state.
Valve 1 not tight / gas pressure
switch 2 does not open.
Check setting of gas pressure
switch 2; check connecting
cable; replace gas valve.
E2
Burner control unit in
a fault state.
Valve 2 not tight; gas pressure
switch 2 does not close.
Check setting of gas pressure
switch 2; check connecting
cable; replace gas valve.
Shortage of gas to gas pressure
switch 2; valve leak test.
Gas valve does not open; gas
valve leaking; gas pressure
switch 2 faulty.
Replace gas valve.
E3
Burner control unit in a fault
state.
Lead break, strapping plug fJ.
Check strapping plug fJ.
E4
Burner shuts down
Multiple detection of
undervoltage with return and
renewed undervoltage.
Check the power supply.
E5
Burner control unit in
a fault state.
Internal fault of the burner
control unit and during test of
ionization input.
Replace burner control unit.
EE
Burner control unit in a fault
state.
Internal error in feedback from
gas safety valves; output relay
does not respond.
Reset burner control unit;
replace burner control unit.
EF
Burner control unit in a fault
state.
Internal error in feedback from
gas safety valves; output
relay does not respond.
Reset burner control unit;
replace burner control unit.
E0
Operation according to internal
burner control unit defaults.
Communication error, burner
control unit.
Check plug and KM BUS
to burner control unit.
F1
Burner control unit in a fault
state; system cools down.
Flue gas excess temperature;
excessive gas throughput.
Wait until temperature falls
below the permissible flue gas
temperature. Reset burner
control unit. Check water level;
check heat exchanger surfaces
for contamination; check CO2
setting; set gas throughput
according to rated heating
output of boiler (for connection
values, see boiler service
instructions).
F2
Burner control unit in a fault
state; system cools down.
Excessive boiler water
temperature.
Wait until temperature falls
below the permissible boiler
water temperature.
Reset burner control unit.
F3
Ionization flame monitor reports
faulty flame signal during startup or after the post-purge.
Gas valve not gas tight (gas is
escaping and burning);
incorrect coding card.
Check ionization path; replace
coding card; replace gas valve.
69
Troubleshooting
Displayed
fault code
System characteristics
Cause
Measures
F4
No flame formation during safety
time; ionization flame monitor
reports no flame signal.
Ionization electrode incorrectly
adjusted; ionization electrode not
plugged in. Ground leakage of
electrode or cable.
Insert plug of ionization electrode;
check cables; adjust ionization
electrode (see boiler service
instructions)
No flame formation during safety
time; ionization flame monitor
reports no flame signal.
Ignition electrodes incorrectly
adjusted, electrodes grounded,
faulty ignition unit, faulty burner
control unit.
Adjust ignition electrodes
(see boiler service instructions);
replace ignition unit; replace
burner control unit.
No flame formation during safety
time; ionization flame monitor
reports no flame signal.
Insulation body of ignition or
ionization electrode cracked.
Replace ignition or ionization
electrode
Poor start-up characteristics;
rotary damper does not close.
Servomotor faulty, servomotor
connecting cable faulty, output
relay faulty (burner control unit).
Replace connecting cable;
replace servomotor; replace
burner control unit.
Flame does not build during the
safety time, no signal captured
by the ionization flame monitor.
Incorrect gas type selected.
Select gas type (see boiler
service instructions).
Flame does not build during the
safety time, no signal captured
by the ionization flame monitor.
Gas valve does not open.
Check connecting cable; check
gas valve and replace if required.
Flame does not build during the
safety time, no signal captured
by the ionization flame monitor.
Combustion characteristics not
ideal.
Adjust the burner (see boiler
service instructions); if necessary
also adjust the setting screws
when the burner is off to be able
to start the burner).
Air pressure switch shows no air
pressure, fan not running.
Air pressure switch is faulty,
incorrectly connected or
incorrectly set.
Replace air pressure switch,
connect or set correctly.
Air pressure switch switches off
during operation.
Flue gas back pressure;
condensate banked up;
air pressure switch hose faulty;
connecting hose leaking.
Remove flue gas back pressure;
check if condensate banked up;
reset burner control unit; replace
hose.
F6
Gas pressure switch notifies no
gas pressure.
Gas shut-off valve closed; gas
pressure switch faulty; multiple
problems with gas supply.
Open gas shut-off valve; check
gas flow pressure; replace gas
filter if required; reset burner
control unit; replace gas valve.
F7
Fan pressure is produced during
the air pressure switch idle
state check.
Wind influence on fan.
Check the flue draught (chimney)
Air pressure switch contact is not
in the idle state.
Air pressure switch faulty.
Replace the air pressure switch.
Flame extinguishes during
operation.
Incorrect gas type selected.
Select gas type (see boiler service
instructions).
Flame extinguishes during
operation.
Burner gauze assembly faulty.
Check burner gauze assembly;
replace if damaged.
Flame extinguishes during
operation.
Combustion characteristics not
ideal.
Adjust burner (see boiler service
instructions).
F5
F8
70
(continued)
5513 463 - 06
Burner Fault Codes
Vitotronic 300, GW6B Installation and Service
Troubleshooting
Vitotronic 300, GW6B Installation and Service
Burner Fault Codes
(continued)
Displayed
fault code
System characteristics
Cause
Measures
F9
Fan not running; fan speed not
reached.
Fan faulty; cables are faulty or
broken.
Check cables and replace the fan
if required
Status duration too long, fan
ramp-up.
Internal fault; fan cannot reach
its set value.
Replace fan or burner control
unit.
Varying fan speed
Fan faulty, cable a-ÖA faulty or
broken. Check cable a-ÖA;
check external power supply;
replace the cable or fan; remove
foreign bodies.
Check cable; replace cable
a-ÖA or fan.
No fan feedback.
Fan faulty, external fan power
supply not connected or faulty
cable a-ÖA or cable broken, fan
blocked (poss. by foreign bodies).
Check cable a-ÖA; check
external power supply; replace
cable or fan; remove foreign
bodies.
Fa
Fan runs without demand; burner
control unit in a fault state.
Fan does not reach idle state,
cable a-ÖA faulty, fan faulty,
faulty burner control unit.
Fan subject to wind influence,
check flue outlet and fan, replace
cable a-ÖA, replace fan,
replace burner control unit.
Fd
Burner control unit in a fault
Burner control unit in a fault
state; system cools down; burner state.
control unit locked out.
Read off fault at the burner
control unit display and
programming unit (boiler service
instructions).
80
Burner control unit in a fault
state; system cools down;
burner control unit locked out.
Short circuit, boiler water
temperature sensor, burner
control unit.
Check lead and dual sensor;
replace sensor if required.
81
Burner control unit in a fault
state.
Sensor drift, boiler water
temperature sensor, burner
control unit.
Check lead and dual sensor;
replace sensor if required.
82
Burner control unit in a fault
state; system cools down;
burner control unit locked out.
Short circuit, flue gas
temperature sensor (A or B),
burner control unit.
Check lead and sensors (A or B),
replace sensor if required.
83
Burner control unit in a fault
state.
Sensor drift, flue gas temperature Check lead and sensors (A and
sensor (A or B), burner control
B), replace sensor if required.
unit.
88
Burner control unit in a fault
state.
Lead break, boiler water
temperature sensor, burner
control unit.
Check lead and dual sensor;
replace sensor if required.
89
Burner control unit in a fault
state.
Lead break, flue gas temperature
sensor (A or B), burner control
unit.
Check lead and sensors (A and
B), replace sensor if required.
b8
Constant mode
Lead break, flue gas temperature
sensor
Remove temperature sensor.
Set code “1f:0” in the “Boiler”
group.
Fault message to the burner control unit:
Refer to the Boiler Service Instructions
5513 463 - 06
Note: If LON participant faults occur, “Fault participant”
... is displayed.
71
Function Description
Vitotronic 300, GW6B Installation and Service
Boiler Water Temperature Control
Brief description
H The boiler water temperature is regulated by modulating
the burner.
H The set boiler water temperature is determined from
the following coding:
– Set supply temperature of the heating circuits
connected to the control unit and the heating circuits
connected via the LON BUS
– External demand
– DHW temperature target
H When the DHW tank is heated, the default set boiler
water temperature is 20 K above the set DHW
temperature (adjustable via coding “60” in the
“DHW” group).
Emissions test function
In multi boiler systems, enable the emissions test function
on all control units.
The following functions are activated:
H Burner start
H Starting all pumps
Note: Only the heating circuit pump is switched ON
in the case of lag boiler control.
H Mixing valve remains set to control function
Function duration < 30 min:
The burner operates at 100% output until the
temperature limiter in the burner control unit switches
off. The burner then cycles, with 100% output, around
the value at the temperature limiter.
Function duration > 30 min (continuous):
Boiler water temperature at max. set value,
e.g. 194°F (90°C).
The burner is operated in modulating mode.
This prevents excessive cycling if emissions testing
is carried out over an extended period.
Cascade Control Unit
Brief description
The supply temperature is regulated by starting or
stopping the burners or by starting/stopping individual
burner
stages.
H Standalone control (see page 73)
H Sequential control (see page 73)
72
5513 463 - 06
H Subject to system version, a difference is made
between the condensing strategy (see page 74)
and 2 conventional boiler strategies (see pages 75
and 76).
Function Description
Vitotronic 300, GW6B Installation and Service
Cascade Control Unit
(continued)
Set supply temperature
The set supply temperature is determined from the
following coding:
H Set supply temperature of heating circuit without
mixing valve A1 (heating circuit 1) and heating circuits
with mixing valve M2 (heating circuit 2) and M3
(heating circuit 3).
H Set supply temperature of further consumers.
H DHW temperature target.
H External demands.
Upper control range limits:
Maximum system supply temperature limit
(coding “37” in the “Cascade” group).
Lower control range limits:
Minimum system supply temperature limit
(coding “36” in the “Cascade” group).
Standalone control
Note: Vitocrossal 200, type CM2, operate in parallel
and with condensing strategy
Boilers connected in parallel
Boilers connected in series
H Without and with supply temperature sensor
(see the following table).
H Without and with supply temperature sensor
(see the following table).
H The cascade control specifies the set boiler water
temperature for all currently active boilers. Every boiler
control unit regulates to the specified set value.
H The control strategy is set automatically to
conventional boiler strategy 2, coding “3c:2” in the
“Cascade” group (see page 79).
The following control strategies are available:
H The cascade control specifies the set boiler water
temperature for all currently active boilers. Every boiler
control unit regulates to the specified set value. If the
lead boiler (condensing boiler) does not achieve the
specified set value, it will only act to control the return
temperature of the conventional boiler downstream.
The conventional boiler is started late and is also shut
down late.
H Condensing strategy (see page 77)
H Conventional boiler strategy 1 (see page 79)
H Conventional boiler strategy 2 (see page 79)
With supply temperature sensor
Without supply temperature sensor
Set coding “3b:1” or “3b:3” in the “Cascade” group.
The control deviation is calculated from the set supply
temperature and the actual supply temperature to
determine the start and shutdown criteria.
Set coding “3b:0” or “3b:2” in the “Cascade” group.
To determine the start and stop criteria, the control
deviation is calculated from the set boiler water
temperature and the estimated average actual boiler
water temperature of the currently active boilers.
Only boilers with open motorized isolation valves are
taken into consideration.
Sequential control
H With supply temperature sensor.
H Set coding “3b:4” in the “Cascade” group.
5513 463 - 06
H The control strategy is set automatically to
conventional boiler strategy 2, coding “3c:2”
in the “Cascade”group (see page 76).
H The cascade control unit regulates to the specified set
supply temperature by stipulating the output for each
individual boiler. The lead boiler can be operated in
modulating mode. All other boilers are operated in two
stages via a specified output (incl. modulating burners).
73
Function Description
Cascade Control Unit
Vitotronic 300, GW6B Installation and Service
(continued)
Control strategies
Condensing strategy
Benefit:
Optimum utilization of the condensing effect and long
burner runtimes
Set coding “3c:0” in the “Cascade” group.
It is the aim of the condensing strategy to operate
as many boilers as possible at the lowest output level.
H Starting criterion:
An output statement causes the boilers to be started
(coding “3d:1” in the “Cascade” group).
An additional boiler will start if the current heat demand
can also be covered by the currently active boilers plus
the next boiler in the boiler sequence (see page 52).
H Shutdown criterion:
The boilers are shut down via a shutdown integral.
The shutdown criterion is met when the shutdown
integral exceeds a limit set at coding “46” in the
“Cascade” group and the boiler started last will be shut
down.
Example (coding “3c:0” in the “Cascade” group)
Two-boiler system with modulating burners:
H Boiler 1: 100% rated heating output
(base load set to 33%)
H Boiler 2: 100% rated heating output
(base load set to 33%)
74
Shutdown
5513 463 - 06
Starting
Function Description
Vitotronic 300, GW6B Installation and Service
Cascade Control Unit
(continued)
Control strategies
Conventional boiler strategy 1
Benefit:
As few boilers as possible are active.
Set coding “3c:1” in the“Cascade” group.
Conventional boilers are preferably operated at their
upper output range, to reliably prevent formation of
condensate due to low return temperatures. 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 boilers can achieve the required output on their
own.
H Starting criterion:
The boilers are started via a starting integral. The next
boiler in the boiler sequence will be started if the value
set in coding “45” in the “Cascade” group is exceeded
(see page 52).
H Shutdown criterion:
An output reduction causes the boiler to shut down
(coding “3d:1” in the “Cascade” group). A boiler is shut
down when the current heat demand can be covered
without the boiler that was started last.
Example:
Two-boiler system with modulating burners:
H Boiler 1: 100% rated heating output
(base load set to 33%)
H Boiler 2: 100% rated heating output
(base load set to 33%)
Conventional boiler strategy 1 (coding “3c:1” in the “Cascade” group)
5513 463 - 06
Starting
Shutdown
75
Function Description
Cascade Control Unit
Vitotronic 300, GW6B Installation and Service
(continued)
Control strategies
Conventional boiler strategy 2
Benefit:
Long burner runtimes.
Coding “3c:2” in the “Cascade” group (factory set
condition).
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 burners were ramped
down to their minimum output because of a major
negative control deviation and the output is still too high.
H Starting criterion:
The boilers are started via a starting integral. The next
boiler in the boiler sequence will be started if the value
set in coding “45” in the “Cascade” group is exceeded
(see page 52).
H Shutdown criterion:
The boilers are shut down via a shutdown integral.
The shutdown criterion is met when the shutdown
integral exceeds a limit set at coding “46” in the
“Cascade” group and the boiler started last will be
shut down.
Example:
Two-boiler system with modulating burners:
H Boiler 1: 100% rated heating output
(base load set to 33%)
H Boiler 2: 100% rated heating output
(base load set to 33%)
Conventional boiler strategy 2 (coding “3c:2” in the “Cascade” group)
76
Shutdown
5513 463 - 06
Starting
Vitotronic 300, GW6B Installation and Service
Function Description
Heating Circuit Control Unit
Only for single boiler and cascade control units
Brief description
H The control unit features control circuits for one heating
circuit without mixing valve A1 (heating circuit 1) and
two heating circuits with mixing valve M2 (heating
circuit 2) and M3 (heating circuit 3).
H The set supply temperature of each boiler is determined
from the following coding:
– Outdoor temperature
– Set room temperature
– Operating mode
– Heating curve slope and shift
H The supply temperature of the heating circuit without
mixing valve corresponds to the common system supply
temperature.
H The supply temperature of the heating circuits with
mixing valve is regulated by the stepped opening or
closing of the mixing valves.
The mixing valve motor control changes the actuating
and pause times subject to the control differential
(control deviation).
Functions
The heating circuit without mixing valve is subject to the
boiler water temperature and its control range limits.
The heating circuit pump is the only actuator.
The supply temperature of the heating circuits with
mixing valve is captured by the supply temperature sensor
of the relevant heating circuit.
H Upper control limit:
Electronic maximum supply temperature limit
coding address “c6” in the “Heating circuit...” group.
H Lower control range limit:
Electronic minimum supply temperature limit
coding address “c5” in the “Heating circuit...” group.
5513 463 - 06
Time program
The control unit switches over according to the time
program. In the “Heating and DHW” operating program,
the control unit switches between “Central heating with
standard room temperature” and “Central heating with
reduced room temperature”.
Every operating mode has its own set level.
4 time phases per day can be selected.
Outdoor temperature
A heating curve must be set 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.
The control unit uses an average outdoor temperature.
This comprises the actual and the adjusted outdoor
temperature.
Room temperature
In conjunction with a remote control and room
temperature hook-up (coding “b0” in the “Heating
circuit...”) group:
Compared with the outdoor temperature, the room
temperature has a greater influence on the set boiler
water temperature (changed at coding “b2” in the
“Heating circuit...” group).
In conjunction with heating circuits with mixing valve:
For control differentials (actual value deviation) above
2 K room temperature, the influence can be increased
further (coding “b6” in the “Heating circuit...” group):
H Quick heat-up
The set room temperature must be raised by at least
2 K by the following measures:
– Enabling comfort mode
– Changing from central heating with reduced
temperature to central heating with standard
temperature
– Start optimization (coding “b7” in the “Heating
circuit...” group) Quick heat-up will stop when the
set room temperature has been reached.
H Quick setback
The set room temperature must be reduced by at least
2 K by the following measures:
– Activating economy mode
– Changing from central heating with standard
temperature to central heating with reduced
temperature
– Shutdown time optimization (coding address “c1”
in the “Heating circuit...” group)
Quick setback ends when the set room temperature
has been reached.
77
Function Description
Heating Circuit Control Unit
Vitotronic 300, GW6B Installation and Service
(continued)
DHW temperature
Priority control
H With priority control: (coding address “a2:2” in the
“Heating circuit...” group):
The set supply temperature will be adjusted to 32°F
(0°C) during tank heating. The mixing valve closes
and the heating circuit pump is switched off.
H Without priority control:
The heating circuit control unit continues to operate
with the same set value.
H With modulating priority control in conjunction with
heating circuits with mixing valve:
The heating circuit pump remains switched on.
During tank heating the set supply temperature
of the heating circuit will be reduced until the set
boiler water temperature has been reached.
The set supply temperature is determined from the
following coding:
– Outdoor temperature
– Differential between the set and the actual boiler
water temperature
– Heating curve slope and shift
– Set coding “a2” in the “Heating circuit...” group
System dynamics
The mixing valve control characteristics can be influenced
at coding “c4” in the “Heating circuit...” group.
Central control
Coding “7a” in the “General” group enables you
to program central control to one heating circuit.
The operating and holiday program then applies to
all additional heating circuits of the system.
For these heating circuits, when the operating and
holiday program is enabled,“Central control” is displayed.
Any holiday programs that may have been set will be
deleted.
Party and economy modes cannot be enabled on all
control units.
Frost protection
The supply temperature is held in accordance with the
heating curve for the reduced set room temperature,
but at least at 50°F (10°C).
A variable frost limit can be set in line with coding
address “a3” in the “Heating circuit...” group.
Heating circuit pump logic – Economy circuits
The heating circuit pump is switched OFF [set supply
temperature set to 32°F (0°C)] if one of the following
criteria is met:
H The outdoor temperature selected in coding “a5”
in the “Heating circuit...” group exceeds the set value.
H The adjusted outdoor temperature exceeds the value
set in coding“a6” in the “Heating circuit...” group.
H The mixing valve has been attempting to close for more
than 12 min. (mixing valve economy function, coding
“a7” in the “Heating circuit...” group).
H The pump idle time selected in coding “a9”
in the “Heating circuit ...” group is reached.
Requirements:
– There is no risk of frost.
– Coding “b0” in the “Heating circuit...” group
must be set to 0.
Note: If, during the pump idle time, the system
is switched to heating mode or the set room
temperature is increased, the heating circuit
pump is switched ON,even if the time has
not yet elapsed.
78
5513 463 - 06
H The actual room temperature exceeds the value
set in coding “b5” in the “Heating circuit ...” group.
Vitotronic 300, GW6B Installation and Service
Heating Circuit Control Unit
Function Description
(continued)
Supply temperature control single boiler control unit
Differential temperature:
The differential temperature can be set at coding “9f”
in the “General”group, factory set condition: 8 K.
The differential temperature is the minimum value by
which the boiler water temperature should be higher
than the highest currently required supply temperature
of the heating circuit with mixing valve.
H System with only one heating circuit with mixing valve:
The set boiler water temperature will be automatically
regulated to 8 K above the set supply temperature.
Supply temperature
Legend
A Max. boiler water temperature
B Slope = 1.8 for heating circuit without mixing valve
C Slope = 1.2 for heating circuit with mixing valve
D Boiler water temperature (with a differential
temperature = 8 K)
E Lower boiler water temperature, defaulted by the
boiler coding card
H System with heating circuit without mixing valve and
heating circuit with mixing valve:
The set boiler water temperature operates in
accordance with its own heating curve. The differential
temperature of 8 K towards the set supply temperature
is set at the factory.
Supply temperature control cascade control unit
Differential temperature:
The differential temperature can be set at coding “9f”
in the “General” group, factory set condition 8 K.
The differential temperature is the value by which the
common supply temperature should be higher than the
highest currently required supply temperature of the
heating circuit with mixing valve.
H System with only one heating circuit with mixing valve:
The common set supply temperature is regulated
automatically to 8 K above the set supply temperature
of the heating circuit with mixing valve.
H System with heating circuit without mixing valve and
heating circuits with mixing valve:
The common set supply temperature operates in
accordance with its own heating curve. The differential
temperature of 8 K towards the set supply temperature
of the heating circuits with mixing valve is set at the
factory.
5513 463 - 06
Legend
A Maximum supply temperature limit
(coding “37” in the “Cascade” group)
B Slope = 1.8 for heating circuit without mixing valve
C Slope = 1.2 for heating circuit with mixing valve
D Common supply temperature (at a differential
temperature = 8 K)
E Lower common supply temperature
79
Function Description
Heating Circuit Control Unit
Vitotronic 300, GW6B Installation and Service
(continued)
Example using the settings in the factory set condition
Legend
A Heating curve for operation with standard room
temperature
B Heating curve for operation with reduced room
temperature
Example using the settings in the factory set condition
Raising the reduced room temperature
During operation with reduced room temperature,
the reduced set room temperature can be automatically
raised subject to the outdoor temperature.
The temperature is raised in accordance with the selected
heating curve, but no higher than the set standard room
temperature.
The outdoor temperature limits for the start and end of
temperature raising can be set in coding “f8” and “f9”
in the “Heating circuit...” group.
Reducing the heat-up time
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 increase can be automatically
raised.
The value and duration for the additional raising of the
boiler water temperature or set supply temperature can
be set in coding “fa” and “fb” in the “Heating circuit...”
group.
Control sequence
Mixing valve circuit
The mixing valve motor will not be switched within the
“neutral zone” (±1 K).
Supply temperature drops
(Set value –1 K)
The mixing valve motor receives the signal “mixing valve
open”. The signal duration lengthens with an increasing
control differential. The duration of pauses reduces with
an increasing control differential.
Supply temperature rises
(set value +1 K)
The mixing valve motor receives the signal “mixing valve
close”. The signal duration lengthens with an increasing
control differential. The duration of pauses reduces with
an increasing control differential.
80
5513 463 - 06
Legend
A Start of operation with standard room temperature
B Set boiler water or supply temperature in accordance
with the selected heating curve
C Set boiler water or supply temperature in accordance
with coding “fa”:
122°F (50°C) + 20% = 146°F (60°C)
D Duration of operation with higher boiler water or set
supply temperature in accordance with coding
“fb”: 60 min
Function Description
Vitotronic 300, GW6B Installation and Service
DHW Tank Temperature Control
Brief description
H The tank temperature control is a constant temperature
control function. This is achieved by starting and
stopping the DHW pump. The switching differential is
±2.5 K.
H When the DHW tank is heated, a set supply
temperature is specified that is 20 K higher than
the set DHW temperature (adjustable at coding
“60” in the “DHW” group).
Functions
Time program
An automatic or an individual time program may be
selected for DHW pump and the DHW recirculation pump.
Compared with the heating circuit heatup phase, DHW
heating starts 30 min earlier in automatic mode.
The individual time program enables up to 4 time
phases per day to be set for DHW pump and the DHW
recirculation pump for every day of the week.
All tank heating sequences will be completed
independently of the time program.
In conjunction with coding “7f” in the “General” group
H Detached house
Coding “7f:1”:
– Automatic mode
The heating times for heating circuit 1 are applied
to systems with two or three heating circuits.
– Individual time program
The time phases for DHW pump and the DHW
recirculation pump have the same effect on all
heating circuits.
H Apartment building
Coding “7f:0”:
– 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 time phases for DHW pump and the DHW
recirculation pump can be adjusted individually for
each heating circuit.
Priority control
H With priority control: (coding
“a2:2” in the “Heating circuit...” group):
The set supply temperature will be adjusted to 32°F
(0°C) during tank heating. The mixing valve closes
and the heating circuit pump is switched off.
H Without priority control:
The heating circuit control unit continues to operate
with the same set value.
H With modulating priority control in conjunction with
heating circuits with mixing valve:
The heating circuit pump remains switched on.
During tank heating the set supply temperature of the
heating circuit will be reduced until the set boiler water
temperature has been reached.
The set supply temperature is determined from the
following coding:
– Outdoor temperature
– Differential between the set and the actual boiler
water temperature
– Heating curve slope and shift
– Set coding “a2” in the “Heating circuit...” group
Frost protection
The DHW tank will be heated to 68°F (20°C) if the DHW
temperature falls below 41°F (5°C).
Forth phase heating function
(auxiliary function for DHW heating)
This function is activated by providing a second set DHW
temperature at coding “58” in the “DHW” group and
activating the fourth DHW phase for DHW heating.
Set DHW temperature
The set DHW temperature can be adjusted between 50
and 140°F (10 and 60°C).
Coding “56” in the “DHW” group enables the set range
to be extended to 203°F (95°C).
Coding “66” in the “DHW” group enables the set value of
the programming unit and/or remote control Vitotrol 300
to be assigned.
5513 463 - 06
DHW recirculation pump
This delivers hot water to the draw-off points at
adjustable times. Four time phases can be selected
at the control unit for every day.
81
Function Description
(continued)
Auxiliary circuits
DHW heating in conjunction with the heating circuits can
be disabled or enabled by changing over the operating
program (see coding “d5” in the “Heating circuit...”
group).
System with tank loading system
The above functions also apply in conjunction with tank
loading systems.
Set the following coding:
“55:3” in the “DHW” group; “4c:1”,
“4e:2” in the “General” group.
The DHW tank is only reheated by the boiler
if the temperature falls below this value.
System with solar control unit
A third set DHW temperature can be assigned at coding
“67” in the “DHW” group.
The DHW tank is only reheated by the boiler
if the temperature falls below this value.
Controlled sequence single boiler control
Coding “55:0” in the “DHW” group; tank heating
The DHW tank goes cold (set value –2.5 K, adjustable
via coding “59”):
H The set boiler water temperature is set 20 K higher
than the set DHW temperature (adjustable via
coding “60”).
H Pump on:
– Starting the DHW pump is subject to boiler water
temperature (coding “61:0”).
The DHW pump starts when the boiler water
temperature is 7 K higher than the DHW temperature.
– Starting the DHW pump for tank heating
immediately (coding “61:1”).
The DHW tank is hot (set value +2.5 K):
H The set boiler water temperature is reset to the
weather-compensated set value.
H Pump delay off:
The DHW pump runs on after tank heating
until one of the following criteria is met:
– The differential between the boiler water temperature
and the DHW temperature is less than 7 K.
– The weather-compensated set boiler water
temperature has been reached.
– The set DHW temperature is exceeded by 5 K.
– The set max. delay off time is reached (coding “62”).
H Without pump delay off (coding “62:0”).
82
Coding “55:1” in the “DHW” group;
adaptive tank heating
With adaptive tank heating, the speed of the temperature
rise during DHW heating is taken into account.
The DHW tank goes cold (set value –2.5 K,
adjustable via coding “59”):
H The set boiler water temperature is set 20 K higher
than the set DHW temperature (adjustable via coding
“60”).
H Pump on:
– Starting the DHW pump is subject to boiler water
temperature (coding “61:0”):
The DHW pump starts when the boiler water
temperature is 7 K higher than the DHW temperature.
– Starting the DHW pump immediately (coding “61:1”).
The DHW tank is hot:
H The control unit checks whether the boiler will still
be required to supply heating energy after the tank
has been heated up or whether residual boiler heat
should be transferred to the DHW tank.
Accordingly, the control unit determines the burner
and DHW pump stop times to prevent the set
DHW temperature being substantially exceeded after
the tank has been heated up.
Coding “55:2” in the “DHW” group;
tank temperature control with 2 tank
temperature sensors
Tank temperature sensor 1 enables the DHW pump and
is evaluated for stop conditions during the pump delay
off time.
Tank temperature sensor 2:
Tank heating will start early if a lot of hot water
is drawn off. Tank heating will terminate early if
no hot water is drawn off.
DHW tank goes cold:
H Set value −2.5 K, change at coding “59”
or
H Actual DHW temperature at sensor 2 < set DHW
temperature x factor for start time (adjustment at
coding “69”)
The DHW tank is hot:
H set value +2.5 K
and
H Actual DHW temperature at sensor 2 > set DHW
temperature x factor for stop time (adjustment at
coding “68”)
5513 463 - 06
DHW Tank Temperature Control
Vitotronic 300, GW6B Installation and Service
Function Description
Vitotronic 300, GW6B Installation and Service
DHW Tank Temperature Control
(continued)
Coding “55:3” in the “DHW” group;
tank temperature control tank loading system
The DHW tank goes cold (set value −2.5 K; change
at coding “59”):
H The set boiler water temperature is set 20 K higher than
the set DHW temperature (adjustable via coding “60”).
H The primary pump in the tank loading system starts.
H The 3-way mixing valve opens and then regulates to
the specified set value.
H The DHW pump cycles (briefly switches on and off)
until the set supply temperature has been reached (set
DHW temperature + 5 K).
Then it runs constantly. If, during heating, the actual
value falls below the required set temperature,
the DHW pump will temporarily cycle again.
The DHW tank is hot:
H Tank temperature sensor 1:
Actual value ≥ set value
and
Tank temperature sensor 2:
Actual value > set value –1.5 K:
Controlled sequence cascade control
The following coding in the “DHW” group influence the
controlled sequence.
Tank heating (coding “55:0”)
The DHW tank goes cold (set value –2.5 K, adjustable
via coding “59”):
H The common set supply temperature is set 20 K higher
than the set DHW temperature (adjustable via coding
“60”).
The DHW tank is hot (set value +2.5 K):
H The common set supply temperature is returned to
the set weather-compensated value.
H With pump delay off:
The DHW pump runs on after tank heating
until one of the following criteria is met:
– The set DHW temperature is exceeded by 5 K.
– The set max. delay off time is reached (coding “62”).
H Without pump delay off (coding “62:0”).
H The DHW pump stops immediately when the 3-way
mixing valve is fully opened.
or
H The common set supply temperature is set 20 K higher
than the set DHW temperature (adjustable via coding
“60”).
H The DHW pump stops after expiry of the delay off time
that is selected at coding “62”.
The DHW tank is hot:
5513 463 - 06
H The set boiler water temperature is reset to the
weather-compensated set value.
Adaptive storage tank heating enabled (coding “55:1”)
With adaptive tank heating, the speed of the temperature
rise during DHW heating is taken into account.
The DHW tank goes cold (set value –2.5 K, adjustable via
coding “59”):
H The control unit checks whether the boiler will still be
required to supply heating energy after the tank has
been heated up or whether residual boiler heat should
be transferred to the DHW tank.
Accordingly, the control unit determines the burner and
circulation pump stop times to prevent the set DHW
temperature being substantially exceeded after the
tank has been heated up.
83
Function Description
DHW Tank Temperature Control
Vitotronic 300, GW6B Installation and Service
(continued)
Storage tank temperature control with 2 temperature
sensors (coding “55:2”)
Tank temperature sensor 1 enables the DHW pump for
tank heating and is evaluated for stop conditions during
the pump delay off time.
Tank temperature sensor 2:
Tank heating will start early if a lot of hot water is drawn
off. Tank heating will terminate early if no hot water is
drawn off.
DHW tank goes cold:
H Set value –2.5 K, adjustable via coding “59”
or
H Actual DHW temperature at sensor 2 < set DHW
temperature x factor for start time (adjustment at
coding “69”)
The DHW tank is hot:
H Set value +2.5 K
and
H Actual DHW temperature at sensor 2 > set DHW
temperature x factor for stop time (adjustment at
coding “68”)
Coding “55:3” in the “DHW” group;
tank temperature control tank loading system
The DHW tank goes cold (set value –2.5 K, adjustable via
coding “59”):
H The common set supply temperature is set 20 K higher
than the set DHW temperature (adjustable via coding
“60”).
H The primary pump in the tank loading system starts.
H The 3-way mixing valve opens and then regulates to
the specified set value.
H The DHW pump cycles (briefly switches on and off)
until the set supply temperature has been reached (set
DHW temperature + 5 K).
Then it runs constantly.
If, during heating, the actual value falls below the
required set temperature, the circulation pump for
tank heating will temporarily cycle again.
The DHW tank is hot:
H Tank temperature sensor 1:
Actual value ≥ set value
and
Tank temperature sensor 2:
Actual value > set value -1.5 K:
H The common set supply temperature is returned to the
set weather-compensated value.
84
5513 463 - 06
H The DHW pump stops immediately when the 3-way
mixing valve is fully opened.
or
The DHW pump stops after expiry of the delay off
time that is selected at coding “62”.
Coding levels
Vitotronic 300, GW6B Installation and Service
Calling up Coding Levels
H Coding are split into the following groups:
– “General”
– “Combustion controller”
– “DHW”
– “Solar”
– “Heating circuit 1/2/3”
– “Boiler”
– “Cascade”
– “All coding”
In this group, all coding in the coding levels
are listed in ascending order (except the coding
in the “Solar” group).
Display for coding levels
H Heating systems with one heating circuit without
mixing valve and one or two heating circuits with
mixing valve:
In the following, the heating circuit without mixing
valve is designated “Heating circuit 1” and the heating
circuits with mixing valve as “Heating circuit 2” or
“Heating circuit 3”.
H The selected designation appears if the heating circuits
have been designated individually.
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “System configuration”
5. “Coding level 1”
or
“Coding level 2”:
Enter “viexpert” password.
Legend
A Coding
B Number of coding
C Value of coding
D Coding description
6. Select group.
7. Select coding.
8. “Change”
9.
for the required value in line with the following
tables.
Resetting Coding to their Factory Set Condition
From the home screen tap the following buttons:
1. “Menu”
2. “Service”
3. Enter “viservice” password.
4. “System configuration”
5. “Coding level 1”
or
“Coding level 2”:
Enter “viexpert” password.
5513 463 - 06
6. “Reset coding”
85
Coding level 1
Vitotronic 300, GW6B Installation and Service
“General” Group
Coding
Coding in the factory set condition
System design
00:1
System version 1:
One heating circuit without mixing valve
A1 (heating circuit 1), without DHW
heating
3
4
5
6
7
8
9
10
00:2
to
00:10
Description
One heating circuit without mixing valve A1 (heating circuit 1), with DHW heating;
recognized automatically.
One heating circuit with mixing valve M2 (heating circuit 2), without DHW heating.
One heating circuit with mixing valve (heating circuit 2), with DHW heating
One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve
M2 (heating circuit 2), without DHW heating; recognized automatically.
One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve
M2 (heating circuit 2), with DHW heating; recognized automatically.
Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3),
without DHW heating.
Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW
heating.
One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing
valve M2 (heating circuit 2) and M3 (heating circuit 3), without DHW heating; recognized
automatically.
One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing
valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW heating; recognized automatically.
Coding in the factory set condition
Servomotor runtime
40:...
Actuator runtime at plug gSA1.
Possible change
40:5
to
40:199
“Boiler circuit pump”
53:1
With low loss header:
53:0
Boiler circuit pump only runs on demand
if the burner is operational
(with delay off time)
LON participant no.
77:1
LON participant number.
77:1
to
77:99
“Detached house/apartment building”
7f:1
Detached house
86
For system schemes, see
the following table:
7F:0
Adjustable from 5 to 199 sec.
Boiler circuit pump runs permanently subject to warm weather shutdown
Adjustable from 1 to 99:
1 - 8 = Boiler/heating circuit control unit
9 = Cascade control unit
10 - 97 = Vitotronic 200-H
98 = Vitogate
99 = Vitocom
Apartment building
Separate adjustment of holiday program
and time program for DHW heating
possible.
5513 463 - 06
Value address
00: ...
2
Possible change
Coding level 1
Vitotronic 300, GW6B Installation and Service
“General” Group
(continued)
Coding in the factory set condition
Possible change
“Automatic summer/wintertime changeover”
81:1
Automatic summer/wintertime changeover.
81:0
Manual summer/wintertime changeover
81:2
Do not adjust!
81:3
With LON communication module:
The control unit receives the time.
82:1
to
82:12
January to December
83:1
to
83:5
Week 1 to week 5 of the selected month
83:6
83:6 Last week – 1 week
83:7
83:7 Last week – 2 weeks
83:8
83:8 Last week – 3 weeks
83:9
83:9 Last week – 4 weeks
83:10
to
83:14
Special function
84:1
to
84:7
Monday to Sunday.
85:1
to
85:12
January to December
86:1
to
86:5
Week 1 to week 5 of the
selected month
87:1
to
87:7
Monday to Sunday
--
--
9b:0
to
9b:127
Adjustable from 32 to 261°F (0 to 127°C)
(limited by boiler specific coding)
“Summer time starts: Month”
82:3
March
“Summer time starts: Week of the selected month”
83:2
Week 2 of the selected month
“Summer time starts: Day of the selected week”
84:7
Last Sunday of the selected month
“Wintertime starts: Month”
85:11
November
“Wintertime starts: Week of the selected month”
86:1
Week 1 of the selected month
“Wintertime starts: Day of the selected week”
87:7
Last Sunday of the selected month
“Operation enabled/blocked”
8f:0
Do not adjust!
“Set supply temperature for external demand”
5513 463 - 06
9b:70
Set to 158°F (70°C)
87
Coding level 1
Vitotronic 300, GW6B Installation and Service
“Combustion Controller” Group
Coding in the factory set condition
Possible change
“Max operational output”
02:100
100% of rated heating output
02:0
to
02:100
Adjustable from 0 to 100%
(0% represents burner minimum firing rate)
Natural gas
03:1
LPG
LA: ≤ 1500 m
04:1
HA: > 1500 m
06:5
to
06:127
Adjustable from 41 to 261°F (5 to 127°C)
08:1
to
08:255
Adjustable from 1 to
255 Kmin
09:0
Minimum pause
“Gas type”
03:0
“Altitude”
04:0
“Max boiler temperature”
06:95
Set to 203°F (95°C)
“Integral threshold value of controller”
08:30
Set to 30 Kmin
“Runtime optimization”
09:1
Integral method
“Boiler” Group
Coding in the factory set condition
Possible change
“Single boiler and multi boiler system”
01:2
Multi-boiler system with Viessmann-cascade 01:1
or LON-cascade
01:3
Single boiler system
Do not adjust!
“Consecutive boiler number in multi boiler systems”
07:1
Consecutive boiler number in multi boiler
systems
07:2
to
07:8
Adjustable from 1 to 8
--
--
21:1
to
21:100
The number of hours run before the burner
should be serviced is adjustable from 100 to
10000 h; 1 step 100 h
23:1
to
23:24
Adjustable from 1 to
24 months.
24:1
“Service” is displayed (the address is
automatically set and must be manually
reset after a service has been carried out).
“Flue gas temperature sensor”
1f:0
Do not adjust!
“Service interval”
21:0
No service interval (hours run) selected.
“Interval for service”
23:0
No interval for service
24:0
88
No “Service” display
5513 463 - 06
”Service” display”
Coding level 1
Vitotronic 300, GW6B Installation and Service
“Cascade” Group
Coding in the factory set condition
Possible change
“Number of boilers connected to the cascade”
35:8
8 boilers
35:1
to
35:8
1 to 8 boilers
36:1
to
36:127
Adjustable from 32 to 261°F (0 to 127°C)
(only when operating with standard room
temperature)
37:20
to
37:127
Adjustable from 68 to 261°F (20 to 127°C)
Note: Value must be lower than the lowest
value of coding “06” in the
“Combustion controller” group of every
control unit.
38:1
Lead boiler changeover:
Every first day of the month, the boiler with
the shortest number of hours run by its burner
becomes the lead boiler.
38:2
to
38:200
Lead boiler changeover after 200 to 20,000
hours run
1 step 100 hours run
39:1
to
39:8
Permanent lead boiler is boiler 1, 2, 3 or 8
3a:1
to
3a:8
Permanent last boiler is boiler 1, 2, 3 or 8
3b:0
Standalone parallel boiler circuit:
With supply temperature sensor (see page 73)
3b:2
Standalone serial boiler circuit:
Without supply temperature sensor
(see page 73)
3b:3
Standalone serial boiler circuit:
With supply temperature sensor (see page 73)
3b:4
Sequential control method with supply
temperature sensor (see page 73)
3c:1
Conventional boiler strategy 1 (see page 75)
3c:2
Conventional boiler strategy 2 (see page 76)
3d:0
No output statement
Note: Control only in accordance with
conventional boiler strategy 2
“Minimum system supply temperature limit”
36:0
Electronic minimum system supply
temperature limit set to 32°F (0°C).
“Maximum system supply temperature limit”
37:80
Electronic maximum system supply
temperature limit set to 176°F (80°C).
“Lead boiler or boiler sequence changeover”
38:0
No lead boiler or boiler sequence
changeover (see function description
in chapter “Cascade control”)
“Permanent lead boiler”
39:0
No permanent lead boiler
“Permanent last boiler”
3a:0
No permanent last boiler
“Type of control”
3b:1
Standalone parallel boiler circuit:
With supply temperature sensor
(see page 71)
“Control strategy”
3c:0
Condensing strategy (see page 74)
“Output statement”
5513 463 - 06
3d:1
Output statement for condensing strategy
and conventional boiler strategy 1
89
Coding level 1
“Cascade” Group
Vitotronic 300, GW6B Installation and Service
(continued)
Coding in the factory set condition
Possible change
“ECO threshold boiler 1”
41:31
No ECO threshold boiler 1
41:−30
to
41:+30
Adjustable from -22 to 86°F (−30 to +30°C)
42:−30
to
42:+30
Adjustable from -22 to 86°F (−30 to +30°C)
43:−30
to
43:+30
Adjustable from -22 to 86°F (−30 to +30°C)
44:−30
to
44:+30
Adjustable from -22 to 86°F (−30 to +30°C)
45:1
to
45:255
Adjustable from 1 to 255 K x minute
Note: A boiler or burner stage will shut
down if this value is exceeded.
46:1
to
46:255
Adjustable from 1 to 255 K x minute
Note: A boiler or burner stage will shut
down if this value is exceeded.
47:2
to
47:30
Adjustable from 2 to 30 K
Note: One boiler or one burner stage will be
shut down if the actual supply
temperature exceeds the set supply
temperature by this value.
65:−30
to
65:+30
Adjustable from -22 to 86°F (−30 to +30°C)
6F:−30
to
6F:+30
Adjustable from -22 to 86°F (−30 to +30°C)
74:−30
to
74:+30
Adjustable from -22 to 86°F (−30 to +30°C)
7d:−30
to
7d:+30
Adjustable from -22 to 86°F (−30 to +30°C)
“ECO threshold boiler 2”
42:31
No ECO threshold boiler 2
“ECO threshold boiler 3”
43:31
No ECO threshold boiler 3
“ECO threshold boiler 4”
44:31
No ECO threshold boiler 4
“Start integral threshold”
45:60
Set to 60 K x minute
“Stop integral threshold”
46:40
Set to 40 K x minute
“Stop differential”
47:15
Set to 15 K
“ECO threshold boiler 5”
65:31
No ECO threshold boiler 5
“ECO threshold boiler 6”
6F:31
No ECO threshold boiler 6
“ECO threshold boiler 7”
74:31
No ECO threshold boiler 7
7d:31
90
No ECO threshold boiler 8
5513 463 - 06
“ECO threshold boiler 8”
Coding level 1
Vitotronic 300, GW6B Installation and Service
“DHW” Group
Coding in the factory set condition
“Storage tank heating, hysteresis”
Possible change
55:0
55:1
Tank heating hysteresis ± 2.5 K
55:2
55:3
“For solar DHW heating: DHW temperature target”
67:40
DHW setpoint temperature 104°F (40°C).
Reheating is suppressed above the selected
set temperature (DHW heating blocked by the
boiler).
“DHW recirculation pump”
73:0
ON according to time program
Adaptive storage tank heating enabled
(see page 82)
Storage tank temperature control with 2
temperature sensors (see page 82).
Storage tank temperature control, storage tank
loading system (see page 83)
67:0
to
67:95
Adjustable from 32 to 203°F (0 to 95°C)
(limited by boiler-specific coding)
73:1
to
73:6
73:7
“ON” from once per hour for 5 min up to
6 times per hour for 5 min during the time
program.
Permanently ON
“Solar” Group
Note: The “Solar” group is only displayed if a solar control module, type SM1, is connected.
Coding in the factory set condition
“Solar circuit pump speed control”
02:0
Solar circuit pump is not speed controlled
Possible change
02:1
02:2
“Maximum storage tank temperature”
08:60
DHW setpoint temperature (maximum tank
temperature) 140°F (60°C)
08:10
to
08:90
“Stagnation time reduction”
0a:5
Temperature differential for stagnation time 0a:0
reduction (reduction in the speed of the solar
circuit pump to protect system components 0a:1
and heat transfer medium) 5 K.
to
0a:40
“Solar circuit flow rate”
0f:70
Solar circuit flow rate at maximum pump
0f:1
speed 1.8 USG/min (7 L/min)
to
0f:255
“Extended control function”
20:0
No extended control function enabled
20:1
20:2
20:3
20:4
5513 463 - 06
20:5
20:6
20:7
20:8
20:9
Variable speed solar circuit pump with wave
packet control
Solar circuit pump speed controlled with PWM
control
Adjustable from 50 to 194°F (10 to 90°C)
Stagnation time reduction disabled
Temperature differential adjustable from
1 to 40 K
Adjustable from 0.02 to 6.7 USG/min
(0.1 to 25.5 L/min),
1 step
0.02 USG/min (0.1 L/min).
Additional function for DHW heating
Differential temperature control 2
Differential temperature control 2 and auxiliary
function
Differential temperature control 2 for central
heating backup
Thermostat function
Thermostat function and auxiliary function
Solar heating via external heat exchanger
without additional temperature sensor
Solar heating via external heat exchanger with
additional temperature sensor
Solar heating of two DHW storage tanks
[Solar heating of two DHW tanks]
91
Coding level 1
Vitotronic 300, GW6B Installation and Service
“Heating Circuit ...” Group
Coding in the factory set condition
“Storage tank priority”
a2:2
Tank priority control for heating circuit
pump and mixing valve
Possible change
a2:0
a2:1
a2:3
to
a2:15
“Heating circuit pump logic function (economy control)”
a5:5
With heating circuit pump logic function
(economy control): heating circuit pump
OFF when the outdoor temperature
(OT) is 1 K higher than the set room
temperature (RTset) OT > RTset +1 K
a5:0
a5:1
to
a5:15
Without storage tank priority applicable
to heating circuit pump and mixing valve
Storage tank priority only applicable to
mixing valve
Modulating priority applies to mixing
valves, i.e. the heating circuit receives
a reduced amount of heat.
Without heating circuit pump logic
function
With heating circuit pump logic function:
Heating circuit pump OFF, see the
following table
Coding address With heating circuit pump logic function:
a5:...
Heating circ pump OFF
1
OT > RTset + 5 K
2
OT > RTset + 4 K
3
OT > RTset + 3 K
4
OT > RTset + 2 K
5
OT > RTset + 1 K
6
OT > RTset
7
OT > RTset – 1 K
to
15
OT > RTset – 9 K
Coding in the factory set condition
“Extended economy mode”
a6:36
Extended economy mode disabled
“Mixing valve economy function”
a7:0
Only for heating circuits with mixing
valve:
Without mixing valve economy function
Possible change
a6:5
to
a6:35
a7:1
Extended economy mode enabled,
i.e. the burner and heating circuit pump
will stop and the mixing valve will be
closed at a variable value, adjustable
between 41 to 95°F (5 and 35°C)
plus 2°F (1°C). The base value is the
adjusted outdoor temperature. This
value is based on the actual outdoor
temperature and a time constant, which
takes the cooling down of an average
building into consideration.
With mixing valve economy function:
Heating circuit pump also OFF:
H Mixing valve tries closing for more than
20 min
Heating circuit pump ON:
H Mixing valve in control mode
92
5513 463 - 06
H If there is a risk of frost
Coding level 1
Vitotronic 300, GW6B Installation and Service
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
“Pump idle time”
a9:0
Without pump idle time
Possible change
a9:7
With pump idle time (heating circuit
pump OFF) Function description page 78
Note: The maximum idle time is 10 h.
Pump idle time adjustable from 1 to 15.
1: Short idle time
15: Long idle time
a9:1
to
a9:15
“Room temperature hook-up”
b0:0
With remote control:*1
Heating mode/reduced mode:
Weather-compensated
b0:1
Heating mode: Weather-compensated
Reduced mode: with room temperature
hook-up
Heating mode: with room
temperature hook-up
Reduced mode: Weather-compensated
b0:2
b0:3
Heating mode/reduced mode:
with room temperature hook-up
“Room temperature-dependent heating circuit pump logic function”
b5:0
With remote control:*1
b5:1
No room temperature-dependent heating to
circuit pump logic function
b5:8
Coding address With heating circuit pump logic function:
a5:...
Heating circ pump OFF
1
RTactual > RTset + 5 K
2
RTactual > RTset + 4 K
3
RTactual > RTset + 3 K
4
RTactual > RTset + 2 K
5
RTactual > RTset + 1 K
6
RTactual > RTset
7
RTactual > RTset – 1 K
8
RTactual > RTset – 2 K
Coding in the factory set condition
“Minimum supply temperature limit”
c5:20
Electronic supply temperature minimum
limit 68°F (20°C) (only for operation
with standard room temperature)
“Maximum supply temperature limit”
c6:75
Electronic maximum supply temperature
limit set to 167°F (75°C)
For heating circuit pump logic function,
see the following table:
RTactual
RTactual
RTactual
RTactual
RTactual
RTactual
RTactual
RTactual
>
>
>
>
>
>
>
>
RTset
RTset
RTset
RTset
RTset
RTset
RTset
RTset
+
+
+
+
4
3
2
1
K
K
K
K
–1K
–2K
–3K
Possible change
c5:1
to
c5:127
Adjustable from 34 to 261°F
(1 to 127°C) (limited by boiler specific
coding)
c6:10
to
c6:127
Adjustable from 50 to 261°F
(10 to 127°C) (limited by boiler specific
coding)
5513 463 - 06
*1 Only change the coding for the heating circuit without mixing valve A1 for boilers without lower temperature
limit or for heating circuits with mixing valve if a remote control is connected to them.
93
Coding level 1
“Heating Circuit ...” Group
Vitotronic 300, GW6B Installation and Service
(continued)
Coding in the factory set condition
Possible change
“External operating program changeover”
d5:0
With external operating program changeover
(observe setting of coding “5d”, “5e”, “5f”
and “91” in the “General” group).
Changeover “Constant central heating with
reduced room temperature” or “Standby
mode” (subject to set reduced room
temperature)
d5:1
Changeover to “Constant operation with
standard room temperature”
d8:1
Operating program changeover via input DE1
d8:2
Operating program changeover via input DE2
d8:3
Operating program changeover via input DE3
f2:0
No time limit*2
f2:1
to
f2:12
Time limit adjustable from 1 to 12 h*2.
f8:+10
to
f8:–60
Adjustable from 50 to -76°F (+10 to –60°C)
f8:–61
Function disabled
“EA1 extension: Operating program changeover”
d8:0
No operating program changeover
“Time limit for comfort mode”
f2:8
Time limit for comfort mode or external
operating program changeover via push
button: 8 h*2
Note: Observe setting of coding “5d”,
“5e”, “5f” in the “General” group,
as well as “d5” and “d8” in the
“Heating circuit...” group.
“Temperature limit for terminating reduced mode”
f8:–5
Temperature limit for terminating reduced
mode 25°F (–5°C),
see example on page 80.
Observe coding “a3”.
“Temperature limit for raising the reduced room temperature target”
f9:–14
Temperature limit for raising the reduced
room temperature target 7°F (–14°C),
see example on page 80.
f9:+10
to
f9:–60
Adjustable from 50 to -76°F (+10 to –60°C)
“Raising the set boiler water or supply temperature when changing from operation with reduced room temperature to
operation with standard room temperature”
fa:20
Raising the set boiler water or supply
fa:0
temperature when changing from operation to
with reduced room temperature to
fa:50
operation with standard room temperature
by 20%. See example on page 80.
Adjustable from 0 to 50%
“Duration for raising the set boiler water or supply temperature”
fb:60
Duration for raising the set supply
temperature (see coding “fa”) 60 min.
See example on page 80.
fb:0
to
fb:300
Adjustable from 0 to 300 min
94
5513 463 - 06
*2 In the “Heating and DHW” operating program, comfort mode ends automatically when the system changes over to
operation with standard room temperature.
Coding level 2
Vitotronic 300, GW6B Installation and Service
“General” Group
Coding in the factory set condition
System design
00:1
System version 1:
One heating circuit without mixing valve
A1 (heating circuit 1), without DHW
heating
Value address
00: ...
2
3
4
5
6
7
8
9
10
Possible change
00:2
to
00:10
Description
One heating circuit without mixing valve A1 (heating circuit 1), with DHW heating;
recognized automatically.
One heating circuit with mixing valve M2 (heating circuit 2), without DHW heating.
One heating circuit with mixing valve (heating circuit 2), with DHW heating.
One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve
M2 (heating circuit 2), without DHW heating; recognized automatically.
One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve
M2 (heating circuit 2), with DHW heating; recognized automatically.
Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3),
without DHW heating.
Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW
heating.
One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing
valve M2 (heating circuit 2) and M3 (heating circuit 3), without DHW heating; recognized
automatically.
One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing
valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW heating; recognized automatically.
Coding in the factory set condition
Possible change
“With EA1 extension: DHW recirculation pump runtime for brief operation”
12:5
DHW recirculation pump runtime for
12:1
brief operation: 5 min
to
12:60
“With EA1 extension: Temperature demand”
1e:0
Analogue input 0-10 V:
1E:1
Temperature demand from 32 to 212°F
(0 to 100°C):
1 V 50°F (10°C)
10 V 212°F (100°C)
“Reset time hydraulic switch/buffer
20:...
Controller integral time for low loss
20:1
header in sec, factory set condition
to
defaulted by the boiler coding card.
20:199
The greater the integral action time,
the more accurate but slower the
controller.
“Controller delay hydraulic switch/buffer
22:...
Controller delay low loss header in
20:1
minutes, time between burner start and to
controller start.
20:199
5513 463 - 06
For system schemes,
see the following table:
2f:0
Do not adjust!
“AM1 extension”
32:0
Without AM1 extension
“Function output A2 at AM1 extension”
33:1
Heating circuit pump, heating circuit
without mixing valve A1
(heating circuit 1)
Adjustable from 1 to 60 min
Adjustable from 86 to 248°F
(30 to 120°C):
86°F (30°C)
1V
248°F (120°C)
10 V
Adjustable from 10 to 1990 sec,
10 sec
1 step
Adjustable from 1 to 199 min
--
--
32:1
With AM1 extension
33:0
33:2
DHW recirculation pump
DHW loading pump
95
Coding level 2
(continued)
Coding in the factory set condition
“Function output A1 at AM1 extension”
34:1
Heating circuit pump, heating circuit
without mixing valve A1 (heating circuit 1)
“Servomotor runtime”
Possible change
34:0
34:2
DHW recirculation pump
DHW pump
40:5
to
40:199
Adjustable from 5 to 199 sec.
“Sensor 17A”
4a:0
Do not adjust!
“Sensor 17B”
--
--
4b:0
4b:1
Sensor aJB installed (e.g. temperature sensor
T2); automatic recognition.
4c:1
Primary pump, primary store system
4d:0
4d:2
4d:3
Distribution pump
Boiler pump
Boiler pump with isolation valve function
4e:0
Motorized isolation valve
Note: Factory set condition for lag boilers
Motor for 3-way mixing valve, primary store
system
Mixing valve motor for heating circuit without
mixing valve A1 (heating circuit 1)
40:125
Servomotor runtime at plug gSA1 125 sec
No sensor aJB installed
“Connection at plug 20A1”
4c:0
Connection on plug sÖA1:
Heating circuit pump
“Connection at plug 29”
4d:1
Connection at plug sL: Shunt pump
“Connection at plug 52A1”
4e:1
Motor for 3-way mixing valve for return
temperature control
4e:2
4e:3
“Delay off time, shunt or distribution pump”
4f:5
Delay off time distribution pump 5 min
“Supply temperature sensor for low loss header”
52:0
Without supply temperature sensor
“Boiler circuit pump”
53:1
With low loss header:
Boiler pump only runs on demand if the
burner is operational (with delay off time)
“Solar thermal system”
54:0
Without solar thermal system
4f:0
4f:1
to
4f:60
No pump delay off
Adjustable from 1 to 60 min
52:1
With supply temperature sensor;
automatic recognition.
53:0
Boiler pump runs permanently - subject to
warm weather shutdown.
54:1
54:2
54:3
With Vitosolic 100; automatic recognition.
Vitosolic 200; automatic recognition.
With solar control module SM1, without
auxiliary function; automatic recognition.
With solar control module, type SM1, with
auxiliary function, e.g. central heating
backup; automatic recognition.
54:4
“EA1 extension”
5b:0
Without EA1 extension
96
5b:1
With EA1 extension; automatic recognition.
5513 463 - 06
General” Group
Vitotronic 300, GW6B Installation and Service
Coding level 2
Vitotronic 300, GW6B Installation and Service
“General” Group
(continued)
Coding in the factory set condition
Possible change
“Function output 157 at EA1 extension”
5c:0
Function output aBJ at EA1 extension:
Central fault message
5c:1
Feed pump
5c:2
No function
5c:3
Heating circuit pump, heating circuit without
mixing valve A1 (heating circuit 1), switched
to low speed (reduced mode).
5c:4
Heating circuit pump, heating circuit with
mixing valve M2 (heating circuit 2), switched
to low speed (reduced mode).
5c:5
Heating circuit pump, heating circuit with
mixing valve M3 (heating circuit 3), switched
to low speed (reduced mode).
5d:1
Operating program changeover
5d:2
External demand with minimum set supply
temperature. Set value adjustment at coding
“9b” in the “General” group.
5d:3
External blocking
5d:4
External blocking with fault message
5d:5
Fault message input.
5d:6
Brief operation, DHW recirculation pump (push
button function) Set DHW recirculation pump
runtime at coding “12” in the “General” group.
5e:1
Operating program changeover
5e:2
External demand with minimum set supply
temperature Set value adjustment at coding
“9b” in the “General” group
5e:3
External blocking
5e:4
External blocking with fault message
5e:5
Fault message input
5e:6
Brief operation, DHW recirculation pump (push
button function) Set DHW recirculation pump
runtime at coding “12” in the “General” group.
5f:1
Operating program changeover
5f:2
External demand with minimum set supply
temperature Set value adjustment at coding
“9b” in the “General” group.
5f:3
External blocking
5f:4
External blocking with fault message
5f:5
Fault message input
5f:6
Brief operation, DHW recirculation pump (push
button function) Set DHW recirculation pump
runtime at coding “12” in the “General” group.
“Function input DE1 at EA1 extension”
5d:0
No function
“Function input DE2 at EA1 extension”
5e:0
“Function input DE3 at EA1 extension”
5513 463 - 06
5f:0
No function
97
Coding level 2
General” Group
Vitotronic 300, GW6B Installation and Service
(continued)
“Detached house/apartment building”
7f:1
Detached house
“Fault message”
80:6
A fault message is issued if a fault
occurs for at least 30 sec.
98
7F:0
Apartment building
Separate adjustment of holiday program
and time program for DHW heating possible.
80:0
80:2
to
80:199
Immediate fault message.
Adjustable from
10 to 995 sec,
1 step 5 sec.
5513 463 - 06
Coding in the factory set condition
Possible change
“Delay off time for circulation pump, neutralizing system at output 1 at extension AM1”
6c:0
Delay off time circulation pump
6c:1
Adjustable from 1 to 255 sec
neutralizing system: None
to
6c:255
Delay off time for circulation pump, neutralising system at output 2 at extension AM1”
6d:0
Delay off time circulation pump
6d:1
Adjustable from 1 to 255 sec
neutralizing system: None
to
6d:255
“Display correction for outdoor temperature”
6e:50
No display correction for outdoor
6e:0
Display correction –5 K
temperature
to
to
6e:49
Display correction –0.1 K
6e:51
Display correction +0.1 K
to
to
6e:99
Display correction +4.9 K
“LON communication module”
76:1
With LON communication module;
76:0
Without LON communication module
automatic recognition. If no LON
communication module is installed,
set coding “76:0”.
“LON participant number”
77:1
LON participant number
77:2
LON participant number, adjustable from
to
1 to 99:
77:99
1 - 8 = Boiler and heating circuit control unit
9 = Cascade control unit
10 - 97 = Vitotronic 200-H
98 = Vitogate
99 = Vitocom
“LON communication”
78:1
LON communication enabled
78:0
LON communication disabled
“With LON communication module”
79:1
Control unit is fault manager
79:0
Control unit is not fault manager
“Central control of heating circuits”
7a:0
Without central control of heating circuits 7a:1
With central control Heating circuit without
mixing valve A1 (heating circuit 1)
7a:2
Heating circuit with mixing valve M2
(heating circuit 2)
7a:3
Heating circuit with mixing valve M3
(heating circuit 3)
“LON communication module: Time”
7b:1
Control unit transmits the time.
7b:0
No time transmission
Coding level 2
Vitotronic 300, GW6B Installation and Service
“General” Group
(continued)
Coding in the factory set condition
“Automatic summer/wintertime changeover”
81:1
Automatic summer/wintertime
changeover
“Summer time starts: Month”
82:3
March
“Summer time starts: Week of the selected month”
83:2
Week 2 of the selected month
“Summer time starts: Day of the selected week”
84:7
Last Sunday of the selected month
“Wintertime starts: Month”
85:11
November
“Wintertime starts: Week of the selected month”
86:1
Week 1 of the selected month
“Wintertime starts: Day of the selected week”
87:7
Last Sunday of the selected month
Possible change
81:0
81:2
81:3
Manual summer/wintertime changeover
Do not adjust!
With LON communication module:
The control unit receives the time.
82:1
to
82:12
January to December
83:1
to
83:5
83:6
83:7
83:8
83:9
83:10
to
83:14
Week 1 to week 5 of the
selected month.
84:1
to
84:7
Monday to Sunday
85:1
to
85:12
January to December
86:1
to
86:5
Week 1 to week 5 of the selected month
87:1
to
87:7
Monday to Sunday
“Temperature displayed”
88:0
Temperature unit °C (Celsius)
88:1
“Test display conditions”
8a:175
Do not adjust!
-“Identification KM bus combustion controller”
8b:1
ID exists
8b:0
“Operation enabled/blocked”
8f:0
Do not adjust!
-“Time constant for calculating adjusted outdoor temperature”
90:128
Time constant 21.3 h
90:1
to
90:199
5513 463 - 06
Last week – 1 week
Last week – 2 week
Last week – 3 week
Last week – 4 week
Special function
Temperature unit °F (Fahrenheit)
-ID does not exist
-Fast (low values) or slow (high values)
matching of the supply temperature,
subject to the set value when the outdoor
temperature changes 1 step 10 min
99
Coding level 2
General” Group
Vitotronic 300, GW6B Installation and Service
(continued)
Coding in the factory set condition
Possible change
“Connection at terminals 1 and 2 in plug 143”
91:0
Connection disabled (external operating
program changeover)
91:1
Contact affects the following heating
circuits:
Heating circuit without mixing valve A1
(heating circuit 1)
91:2
Heating circuit with mixing valve M2
(heating circuit 2)
91:3
Heating circuit without mixing valve A1
(heating circuit 1) and heating circuit
with mixing valve M2 (heating circuit 2)
91:4
Heating circuit with mixing valve M3
(heating circuit 3)
91:5
Heating circuit without mixing valve A1
(heating circuit 1) and heating circuit
with mixing valve M3 (heating circuit 3)
91:6
Heating circuit with mixing valve M2
(heating circuit 2) and M3
(heating circuit 3)
91:7
Heating circuit without mixing valve A1
(heating circuit 1) and heating circuits
with mixing valve M2 (heating circuit 2)
and M3 (heating circuit 3)
“Central fault message during emissions test function/service display”
93:0
Does not affect central fault
93:1
Affects central fault message
95:1
With Vitocom 100 communication
interface; automatic recognition.
96:1
With extension PCB for heating circuits
2 and 3; automatic recognition
97:0
The outdoor temperature of the sensor
connected to the control unit is only
utilized internally.
97:1
The control unit receives the outdoor
temperature from the Vitotronic 200-H.
98:1
to
98:5
Adjustable from 1 to 5
“Communication interface”
95:0
Without Vitocom 100 communication
interface
“Extension for heating circuits 2 and 3 with mixing valve”
96:0
Without extension PCB for heating
circuits 2 and 3
“With LON communication module: Outdoor temperature”
97:2
The control unit sends the outdoor
temperature to the Vitotronic 200-H.
98:1
100
Viessmann system number in
conjunction with monitoring of several
systems within one LON system with
Vitocom 300
5513 463 - 06
“Viessmann system number”
Coding level 2
Vitotronic 300, GW6B Installation and Service
General” Group
(continued)
Coding in the factory set condition
Possible change
“Connection at terminals 2 and 3 in plug 143”
99:0
Connection disabled
99:1
No function
99:2
External “mixing valve close” Heating
circuit with mixing valve M2 (heating
circuit 2)
99:3
No function
99:4
External “mixing valve close” Heating
circuit with mixing valve M3 (heating
circuit 3)
99:5
No function
99:6
External “mixing valve close” Heating
circuit with mixing valve M2 (heating
circuit 2) and M3 (heating circuit 3
99:7
No function
99:8
External blocking
99:9
No function
99:10
External blocking/external “mixing valve
close” Heating circuit with mixing valve
M2 (heating circuit 2) and M3 (heating
circuit 3)
99:11
No function
99:12
External blocking/external “mixing valve
close” Heating circuit with mixing valve
M3 (heating circuit 3)
99:13
No function
99:14
External blocking/external “mixing valve
close” Heating circuit with mixing valve
M2 (heating circuit 2) and M3 (heating
circuit 3)
99:15
No function
9a:1
No function
9a:2
External “mixing valve open” Heating
circuit with mixing valve M2 (heating
circuit 2)
9a:3
No function
9a:4
External “mixing valve open” Heating
circuit with mixing valve M3 (heating
circuit 3)
9a:5
No function
9a:6
External “mixing valve open” Heating
circuit with mixing valve M2 (heating
circuit 2) and M3 (heating circuit 3)
9a:7
No function
9b:0
to
9b:127
Adjustable from 32 to 261°F
(0 to 127°C)
(limited by boiler specific coding).
“Connection at terminals 1 and 2 in plug 143 “
9a:0
Connection disabled
“Set supply temperature for external demand”
5513 463 - 06
9b:70
Set to 158°F (70°C)
101
Coding level 2
General” Group
Vitotronic 300, GW6B Installation and Service
(continued)
Coding in the factory set condition
Possible change
“With LON communication module: Monitoring LON participants”
9c:20
Monitoring LON participants
If there is no response from a participant
after 20 min, the values specified inside
the control unit are used. Only then will
a fault message be issued.
9c:0
No monitoring.
9c:5
to
9c:60
Time adjustable from 5 to 60 min.
9f:0
to
9f:40
Adjustable from 0 to 40 K
“Differential temperature”
9f:8
Differential temperature 8 K only in
connection with heating circuit without
mixing valve M2 (heating circuit 2) and M3
(heating circuit 3)
“Combustion Controller” Group
Coding in the factory set condition
Possible change
“Max operational output”
02:100
100% of rated heating output
02:0
to
02:100
Adjustable from 0 to 100%
(0% represents burner minimum firing rate)
Natural gas
03:1
LPG
LA: ≤ 1500 m
04:1
HA: > 1500 m
06:5
to
06:127
Adjustable from 41 to 261°F (5 to 127°C)
08:1
to
08:255
Adjustable from 1 to 255 Kmin
09:0
Minimum pause
0a:1
For multi boiler systems with flue gas
damper
“Gas type”
03:0
“Altitude”
04:0
“Max boiler temperature”
06:95
Set to 203°F (95°C)
“Integral threshold value of controller”
08:30
Set to 30 Kmin
“Runtime optimization”
09:1
Integral method
0a:0
102
For multi boiler systems without flue gas
damper
5513 463 - 06
“System design”
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Boiler” Group
Coding in the factory set condition
Possible change
“Single boiler and multi boiler system”
01:2
Multi-boiler system with Viessmann-cascade
or LON-cascade
01:1
Single boiler system
01:3
Do not adjust!
07:2
to
07:8
Consecutive boiler number ,in the case of
multi boiler systems, adjustable from 1 to 8
--
--
21:1
to
21:100
The number of hours run before the burner
should be serviced is adjustable from
100 to 10000 h;
1 step 100 h
23:1
to
23:24
Interval adjustable from 1 to 24 months.
24:1
“Service” display.
The address is automatically set and must
be manually reset after a service has been
carried out.
“Consecutive boiler number in multi boiler systems”
07:1
Consecutive boiler number in multi boiler
systems
“Flue gas temperature sensor”
1f:0
Do not adjust!
“Service interval”
21:0
No service interval (hours run) selected.
“Interval for service”
23:0
No interval for service.
”Service” display”
24:0
No “Service” display.
“Cascade” Group
Coding in the factory set condition
Possible change
“Number of boilers connected to the cascade”
35:8
8 boilers
35:1
to
35:8
1 to 8 boilers
36:1
to
36:127
Adjustable from 32 to 261°F (0 to 127°C)
(only when operating with standard room
temperature)
37:20
to
37:127
Adjustable from 68 to 261°F (20 to 127°C)
Note: Value must be lower than the lowest
value of coding “06” in the
“Combustion controller” group of every
control unit.
“Minimum system supply temperature limit”
36:0
Set to 32°F (0°C)
“Maximum system supply temperature limit”
5513 463 - 06
37:80
Set to 176°F (80°C)
103
Coding level 2
(continued)
Coding in the factory set condition
“Lead boiler or boiler sequence changeover”
38:0
No lead boiler or boiler sequence
changeover; see function description
in chapter “Cascade control”
Possible change
38:1
38:2
to
38:200
“Permanent lead boiler”
39:0
No permanent lead boiler
“Permanent last boiler”
3a:0
No permanent last boiler
“Type of control”
3b:1
Standalone parallel boiler circuit:
Without supply temperature sensor
(see page 73)
39:1
to
39:8
Permanent last boiler is boiler 1, 2, 3
or 8
3a:1
to
3a:8
Permanent last boiler is boiler 1, 2, 3
or 8
3b:0
Standalone parallel boiler circuit:
Without supply temperature sensor
(see page 73)
Standalone serial boiler circuit:
Without supply temperature sensor
(see page 73)
Standalone serial boiler circuit:
With supply temperature sensor
(see page 73)
Sequential control method with
supply temperature sensor
(see page 73)
3b:2
3b:3
3b:4
“Control strategy”
3c:0
Condensing strategy (see page 74)
3c:1
3c:2
“Output statement”
3d:1
Output statement for condensing
3d:0
strategy and conventional boiler strategy 1
“System pump”
3e:0
System pump will only run if there
is a heat demand.
“Tank priority control for system pump”
3f:0
Without tank priority control for system
pump
“ECO threshold boiler 1”
41:31
No ECO threshold boiler 1
104
Lead boiler changeover:
Every first day of the month, the boiler
with the shortest number of hours run
by its burner becomes the lead boiler.
Lead boiler changeover after 200 to
20,000 hours run
1 step 100 hours run
Conventional boiler strategy 1
(see page 75)
Conventional boiler strategy 2
(see page 76)
No output statement
Note: Control only in accordance with
conventional boiler strategy 2.
3e:1
System pump always runs; shutdown
through “External blocking” signal.
3f:1
With tank priority control
for system pump
41:−30
to
41:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
5513 463 - 06
“Cascade” Group
Vitotronic 300, GW6B Installation and Service
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Cascade” Group
(continued)
Coding in the factory set condition
“ECO threshold boiler 2”
42:31
No ECO threshold boiler 2
“ECO threshold boiler 3”
43:31
No ECO threshold boiler 3
“ECO threshold boiler 4”
44:31
No ECO threshold boiler 4
“Start integral threshold”
45:60
Set to 60 K x minute
“Stop integral threshold”
46:40
Set to 40 K x minute
“Stop differential”
47:15
Set to 15 K
“ECO threshold boiler 5”
65:31
No ECO threshold boiler 5
“ECO threshold boiler 6”
6f:31
No ECO threshold boiler 6
“ECO threshold boiler 7”
74:31
No ECO threshold boiler 7
5513 463 - 06
“ECO threshold boiler 8”
7d:31
No ECO threshold boiler 8
Possible change
42:−30
to
42:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
43:−30
to
43:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
44:−30
to
44:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
45:1
to
45:255
Adjustable from 1 to 255 K x minute
Note: A boiler or burner stage will
shut down if this value is
exceeded.
46:1
to
46:255
Adjustable from 1 to 255 K x minute
Note: A boiler or burner stage will
shut down if this value is
exceeded.
47:2
to
47:30
Adjustable from 2 to 30 K
Note: One boiler or one burner stage
will be shut down if the actual
supply temperature exceeds the
set supply temperature by this
value.
65:−30
to
65:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
6f:−30
to
6f:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
74:−30
to
74:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
7d:−30
to
7d:+30
Adjustable from -22 to 86°F
(−30 to +30°C)
105
Coding level 2
Vitotronic 300, GW6B Installation and Service
“DHW” Group
Coding in the factory set condition
“Storage tank heating, hysteresis”
55:0
Tank heating, hysteresis ± 2.5 K
Possible change
55:1
55:2
55:3
“DHW temperature target”
56:0
DHW temperature target
[Set DHW temperature] adjustable
from 50 to 140°F (10 to 60°C).
“Additional function for DHW heating”
58:0
Without additional function for DHW
heating
“Tank heating: Set start point”
59:0
Set start point –2.5 K
Set stop point +2.5 K
Adaptive storage tank heating enabled
(see page 82)
Storage tank temperature control with 2
tank temperature sensors (see page 82)
Storage tank temperature control,
storage tank loading system
(see page 83)
56:1
Adjustable from 50 to above 140°F
(10 to above 60°C).
Note: Observe the max. permissible
DHW temperature.
58:10
to
58:60
Input of a second set DHW temperature;
adjustable from 50 to 203°F
(10 to 95°C)
(observe coding “56”).
59:1
to
59:10
Adjustable from 1 to 10 K below set
value
“For DHW heating”
5a:0
The set supply temperature is
determined by the highest system
supply temperature demand.
Scan of the temperature in the
“Diagnosis” menu, “General”
(“Common demand temp.”).
“Boiler temperature during DHW heating”
60:20
During DHW heating, the boiler water
temperature is up to 20 K higher than
the set DHW temperature.
5a:1
The supply temperature target is
determined by the DHW tank supply
temperature demand.
Scan of the temperature in the
“Diagnosis” menu, “General”
(“Common demand temp.”).
60:10
to
60:50
The differential between the common
supply temperature and the set DHW
temperature is adjustable from
10 to 50 K.
“DHW pump”
61:1
61:1
DHW pump starts subject to boiler
temperature.
DHW pump starts immediately.
“DHW pump delay off”
62:10
DHW pump with a delay off time
of up to 10 min after tank heating
106
5513 463 - 06
62:0
No DHW pump delay off
62:1
Delay off time adjustable from 1 to 15 min
to
62:15
“In comfort mode and after external changeover to constant operation with the standard room temperature”
64:2
Enable constant DHW heating and DHW 64:0
No DHW heating; DHW pump “OFF”
pump “ON”
64:1
DHW heating and DHW pump “ON”
according to time program
Coding level 2
Vitotronic 300, GW6B Installation and Service
“DHW” Group
(continued)
Coding in the factory set condition
“Input of the set DHW temperature”
66:4
At the programming unit of the control
unit and all installed Vitotrol 300A
remote controls
Possible change
66:0
66:1
66:2
66:3
66:5
66:6
66:7
“For solar DHW heating: DHW temperature target”
67:40
DHW setpoint temperature 104°F
67:0
(40°C). Reheating is suppressed above
67:10
the selected set temperature (DHW
to
heating by the boiler only if solar energy 67:95
is not sufficient).
“With 2 tank temperature sensors: Tank heating stop point”
68:8
With 2 tank temperature sensors (coding 68:2
“55:2”): Tank heating stop point at set
to
value x 0.8
68:10
“With 2 tank temperature sensors: Tank heating start point”
69:7
With 2 tank temperature sensors (coding 69:1
“55:2”): Tank heating start point at set
to
value x 0.7
69:9
“Runtime, actuator, mixing valve, heat exchanger set, Vitotrans 222”
6A:75
Runtime, servomotor, mixing valve, heat 6A:10
exchanger set, Vitotrans 222, (80 and
to
120 kW): 75 sec
6A:255
“DHW recirculation pump”
70:0
DHW recirculation pump “ON” according 70:1
to time program when DHW heating is
enabled
70:1
DHW recirculation pump “ON” according 71:1
71:2
to time program
72:0
DHW recirculation pump “ON” according 72:1
72:2
to time program
73:0
DHW recirculation pump “ON” according 73:1
to time program
to
73:6
73:7
5513 463 - 06
75:0
DHW recirculation pump “ON” according 75:1
to time program
At the programming unit of the
control unit
At the programming unit of the control
unit and remote control unit of the
heating circuit without mixing valve A1
(heating circuit 1)
At the programming unit of the control
unit and remote control unit of the
heating circuit with mixing valve M2
(heating circuit 2)
At the programming unit of the control
unit and remote control unit of the
heating circuit with mixing valve M3
(heating circuit 3)
At the remote control of the heating
circuit without mixing valve A1 (heating
circuit 1)
At the remote control of the heating
circuit with mixing valve M2 (heating
circuit 2)
At the remote control of the heating
circuit with mixing valve M3 (heating
circuit 3)
No set value 3
DHW setpoint temperature adjustable
from 50 to 203°F (10 to 95°C)
(limited by boiler-specific coding).
Observe setting of coding “56”.
Factor adjustable from 0.2 to 1
1 step 0.1
Factor adjustable from 0.1 to 0.9
1 step 0.1
For heat exchanger set Vitotrans
222 (240 kW): set 113 sec. Runtime
adjustable from 10 to 255 sec
DHW recirculation pump “ON” according
to time program
“OFF” during DHW heating to set value 1
“OFF” during DHW heating to set value 1
“OFF” during DHW heating to set value 2
“OFF” during DHW heating to set value 2
“ON” from once per hour for 5 min up to
6 times per hour for 5 min during the
time program
Constantly “ON”
DHW recirculation pump “OFF” during
economy mode
107
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Solar” Group
Only in conjunction with solar control module, type SM1.
108
5513 463 - 06
Coding in the factory set condition
Possible change
“Differential between the actual DHW temperature and the start point for the solar circuit pump”
00:8
Start temperature differential for solar
00:2
Adjustable from 2 to 30 K
circuit pump 8 K
to
00:30
“Differential between the actual DHW temperature and the stop point of the solar circuit pump”
01:4
Stop temperature differential for solar
01:1
Adjustable from 1 to 29 K
circuit pump 4 K
to
01:29
“Solar circuit pump speed control”
02:0
Solar circuit pump is not speed-controlled 02:1
Variable speed solar circuit pump with
wave packet control
02:2
Solar circuit pump speed controlled
with PWM control
“Temperature differential between the collector temperature and actual DHW temperature”
03:10
Temperature differential for the start of
03:5
Adjustable from 5 to 20 K
speed control 10 K
to
03:20
“Controller amplification of the speed control”
04:4
Controller amplification of the speed
04:1
Adjustable from 1 to 10%/K
control 4%/K
to
04:10
“Minimum speed of the solar circuit pump”
05:10
Minimum speed of the solar circuit pump 05:2
Adjustable from 2 to 100%
10% of the maximum speed
to
05:100
“Maximum speed of the solar circuit pump”
06:75
Maximum speed of the solar circuit
06:1
Adjustable from 1 to 100%
pump 75% of maximum possible speed
to
06:100
“Interval function of the solar circuit pump”
07:0
Interval function of the solar circuit
07:1
Interval function of the solar circuit
pump switched off
pump switched on
To capture the collector temperature
more accurately, the solar circuit
pump starts for short cycles.
“Maximum storage tank [tank] temperature”
08:60
DHW setpoint temperature (maximum
08:10
Adjustable from 50 to 194°F
tank temperature) 140°F (60°C)
to
(10 to 90°C)
08:90
“Maximum collector temperature”
09:130
Maximum collector temperature
09:20
Adjustable from 68 to 392°F
(to protect system components)
to
(20 to 200°C)
266°F (130°C)
09:200
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Solar” Group
(continued)
Coding in the factory set condition
“Stagnation time reduction”
0a:5
Temperature differential for reducing the
stagnation time (reduction in solar circuit
pump speed to protect system components
and heat transfer medium) 5 K
“Frost protection function for solar circuit”
0b:0
Frost protection function for solar circuit
switched off
“Delta T monitoring”
0c:1
Delta T monitoring switched on. No flow
rate captured in the solar circuit, or flow
rate too low.
“Night circulation monitoring”
0d:1
Night circulation monitoring switched on
Unintentional flow in the solar circuit is
captured (e.g. at night).
“Calculation of solar yield”
0e:1
Heat statement in conjunction with
Viessmann heat transfer medium
Possible change
0a:0
0a:1
to
0a:40
Stagnation time reduction disabled
Adjustable from 1 to 40 K
0b:1
Frost protection function for solar
circuit switched on (not required with
Viessmann heat transfer medium)
0c:0
Delta T monitoring switched off
0d:0
Night circulation monitoring switched off
0e:2
0e:0
Do not adjust!
No heat statement
“Solar circuit flow rate”
0F:70
Solar circuit flow rate at maximum pump 0f:1
speed 1.8 USG/min (7 L/min)
to
0f:255
“Target temperature control”
10:0
Target temperature control OFF
10:1
(see coding address “11”)
“Set solar DHW temperature”
11:50
Set solar DHW temperature 122°F (50°C) 11:10
to
H Target temperature control switched
11:90
on (code “10:1”):
Flow rate adjustable from
0.02 to 6.7 USG/min (0.1 to 25.5 L/min)
1 step 0.02 USG/min (0.1 L/min)
Target temperature control switched on
Adjustable from 50 to 194°F
(10 to 90°C)
Temperature at which the water in the
DHW tank heated by solar energy
is to be stratified.
5513 463 - 06
H Code “20:9” (heating of two DHW
tanks) selected:
When one DHW tank reaches its
set DHW temperature, the second
DHW tank is heated.
“Minimum collector temperature”
12:20
Minimum collector temperature
(minimum solar circuit pump start
temperature) 68°F (20°C)
12:0
12:1
to
12:90
No minimum limit
Adjustable from 34 to 194°F
(1 to 90°C)
109
Coding level 2
(continued)
Coding in the factory set condition
“Extended control function”
20:0
No extended control function enabled
Possible change
20:1
20:2
20:3
20:4
20:5
20:6
20:7
20:8
20:9
“Start temperature differential for central heating backup”
22:8
Start temperature differential with central
heating backup 8 K
(code “20:4” must be set)
“Stop temperature differential for central heating backup”
23:4
Stop temperature differential with central
heating backup 4 K
(code “20:4” must be set)
“Start temperature for thermostat function”
24:40
Start temperature for thermostat function
104°F (40°C) (coding “20:5”or “20:6”
must be set)
“Stop temperature for thermostat function”
25:50
Stop temperature for thermostat function
122°F (50°C) (coding “20:5”or “20:6”
must be set)
“Priority for DHW storage tank 1”
26:1
Priority for DHW storage tank 1
with cyclical heating (code “20:9”
must be set)
22:2
to
22:30
Start temperature differential
adjustable from 2 to 30 K
23:2
to
23:30
Stop temperature differential
adjustable from 1 to 29 K
24:0
to
24:100
Adjustable from 0 to 100 K
25:0
to
25:100
Adjustable from 0 to 100 K.
26:0
Priority for DHW storage tank 1
without cyclical heating
Priority for DHW storage tank 2
without cyclical heating
Priority for DHW storage tank 2
with cyclical heating
Alternate heating without priority
for one of the DHW storage tanks
26:2
26:3
26:4
“Alternate heating time”
27:15
Alternate heating time 15 min The
DHW tank without priority is heated at
most for the duration of the set cyclical
heating duration if the DHW tank with
priority is already heated up.
“Alternate pause time”
28:3
Alternate pause time 3 min After the
selected cyclical heating duration for the
DHW tank without priority has expired,
the rise in collector temperature is
captured during the cyclical pause time.
110
Additional function for DHW heating
Differential temperature control 2
Differential temperature control 2 and
auxiliary function
Differential temperature control 2 for
central heating backup
Thermostat function
Thermostat function and auxiliary
function
Solar heating via external heat exchanger
without additional temperature sensor
Solar heating via external heat exchanger
with additional temperature sensor
Solar heating of two DHW storage tanks
[Solar heating of two DHW tanks]
27:5
to
27:60
Adjustable from 5 to 60 min
28:1
to
28:60
Adjustable from 1 to 60 min
5513 463 - 06
“Solar” Group
Vitotronic 300, GW6B Installation and Service
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
“Remote control”
a0:0
Without remote control
Possible change
a0:1
a0:2
“Only with Vitotrol 200”
a1:0
All possible settings at the remote
control can be accessed.
“Storage tank priority”
a2:2
Tank priority for heating circuit pump
and mixing valve.
a1:1
Only comfort mode can be set at the
remote control.
a2:0
Without storage tank priority applicable
to heating circuit pump and mixing valve
Storage tank priority only applicable to
mixing valve
Modulating priority applies to mixing
valves, i.e. the heating circuit receives
a reduced amount of heat.
a2:1
a2:3
to
a2:15
“Outdoor temperature: Heating circuit pump”
a3:2
Outdoor temperature below 34°F (1°C):
Heating circ pump switched on
Outdoor temperature above 37°F (3°C):
Heating circ pump switched off
With Vitotrol 200, recognized
automatically.
With Vitotrol 300 or Vitohome 300;
recognized automatically.
a3:–9
to
a3:15
Heating circuit pump ON/OFF
(see the following table)
IMPORTANT
5513 463 - 06
If a value below 34°F (1°C) is selected, there is a risk
that pipes outside the thermal envelope of the house could
freeze up.
Standby mode in particular should be taken into
consideration, e.g. during holidays.
Coding address
a3:...
Heating circuit pump
Heating circuit pump “ON”
Heating circuit pump “OFF”
-9
14°F (–10°C)
18°F (–8°C)
-8
16°F (–9°C)
19.5°F (–7°C)
-7
18°F (–8°C)
21°F (–6°C)
-6
19.5°F (–7°C)
23°F (–5°C)
-5
21°F (–6°C)
25°F (–4°C)
-4
23°F (–5°C)
27°F (–3°C)
-3
25°F (–4°C)
28.5°F (–2°C)
-2
27°F (–3°C)
30°F (–1°C)
-1
28.5°F (–2°C)
32°F (0°C)
0
30°F (–1°C)
34°F (+1°C)
1
32°F (0°C)
36°F (+2°C)
2
to
15
34°F (+1°C)
to
57 F (+14°C)
27°F (+3°C)
to
61°F (+16°C)
111
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
“Frost protection”
a4:0
With frost protection
“Heating circuit pump logic function (economy control)”
a5:5
With heating circuit pump logic function
(economy control):
heating circuit pump OFF when the
outdoor temperature (OT) is 1 K higher
than the set room temperature (RTset)
OT > RTset +1 K
Possible change
a4:1
No frost protection;
this setting is only possible if code a3:9
has been selected.
Note: “Important” also coding address “a3”.
a5:0
Without heating circuit pump logic
function
With heating circuit pump logic
function: Heating circuit pump OFF,
see the following table
a5:1
to
a5:15
Coding address
a5:...
With heating circuit pump logic function: Heating circuit pump “OFF”
1
OT > RTset + 5 K
2
OT > RTset + 4 K
3
OT > RTset + 3 K
4
OT > RTset + 2 K
5
OT > RTset + 1 K
6
OT > RTset
7
to
15
OT > RTset – 1 K
OT > RTset – 9 K
Coding in the factory set condition
“Extended economy mode”
a6:36
Extended economy mode disabled
“Mixing valve economy function”
a7:0
Only for heating circuits with mixing
valve:
Without mixing valve economy function
Possible change
a6:5
to
a6:35
Extended economy mode enabled,
i.e. the burner and heating circuit pump
will stop and the mixing valve will be
closed at a variable value, adjustable
between 41 to 95°F (5 and 35°C)
plus 2°F (1°C). The base value is
the adjusted outdoor temperature.
This value is based on the actual
outdoor temperature and a time
constant, which takes the cooling
down of an average building into
consideration.
a7:1
With mixing valve economy function:
Heating circuit pump also OFF:
H Mixing valve tries closing for more than
20 min
Heating circuit pump ON:
H Mixing valve in control mode
112
5513 463 - 06
H If there is a risk of frost
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
“Pump idle time”
a9:0
Without pump idle time
Possible change
a9:7
“Output reduction”
aa:2
With output reduction through
temperature sensor aJA
“Room temperature hook-up”
b0:0
With remote control:*1
Heating mode/reduced mode:
Weather-compensated
a9:1
to
a9:15
With pump idle time (heating circuit
pump OFF) Function description page 78
Note: The maximum idle time is 10 h.
Pump idle time adjustable from 1 to 15.
1: Short idle time
15: Long idle time
aa:0
aa:1
Without output reduction
No function.
b0:1
Heating mode: Weather-compensated
Reduced mode:
with room temperature hook-up
Heating mode: with room temperature
hook-up
Reduced mode: Weather-compensated
Heating mode/reduced mode:
with room temperature hook-up
b0:2
b0:3
“Room influence factor”
b2:8
With remote control and for the heating
circuit, operation with room temperature
hook-up must be programmed:*1
Room influence factor 8
b2:0
Without room influence
b2:1
to
b2:31
Adjustable from 1 to 31
“Room control base value”
b3:0
127°F (53°C)
b3:1
“Room temperature-dependent heating circuit pump logic function”
b5:0
With remote control:*1
b5:1
No room temperature-dependent
to
heating circuit pump logic function
b5:8
100°F (38°C)
For heating circuit pump logic function,
see the following table
Coding address
a5:...
Heating circuit pump “OFF”
With heating circuit pump logic function:
1
RTactual > RTset + 5 K
RTactual > RTset + 4 K
2
RTactual > RTset + 4 K
RTactual > RTset + 3 K
3
RTactual > RTset + 3 K
RTactual > RTset + 2 K
4
RTactual > RTset + 2 K
RTactual > RTset + 1 K
5
RTactual > RTset + 1 K
RTactual > RTset
6
RTactual > RTset
RTactual > RTset – 1 K
7
RTactual > RTset – 1 K
RTactual > RTset – 2 K
8
RTactual > RTset – 2 K
RTactual > RTset – 3 K
Heating circuit pump “ON”
5513 463 - 06
*1 Only change the coding for the heating circuit without mixing valve A1 for boilers without lower temperature
limit or for heating circuits with mixing valve if a remote control is connected to them.
113
Coding level 2
“Heating Circuit ...” Group
Vitotronic 300, GW6B Installation and Service
(continued)
Coding in the factory set condition
“Quick heat-up/quick setback”
b6:0
With remote control:*1
Without quick heat-up/quick setback
“Start optimization”
b7:0
With remote control and for the heating
circuit, operation with room temperature
hook-up must be programmed:*1
Without start optimization
“Heat-up gradient start optimization”
b8:10
With remote control and for the heating
circuit, operation with room temperature
hook-up must be programmed:*1
Heat-up gradient start optimization
10 min/K
“Learning start optimization”
b9:0
With remote control and for the heating
circuit, operation with room temperature
hook-up must be programmed:*1
Without learning start optimization
“Shutdown time optimization”
c0:0
With remote control:*1
Without shutdown time optimization
Possible change
b6:1
With quick heat-up/quick setback
(see function description on page 77)
b7:1
With start optimization, max. heat-up
time offset 2 h 30 min
With start optimization, max. heat-up
time offset 15 h 50 min
b7:2
b8:11
to
b8:255
Adjustable from 11 to 255 min/K
b9:1
With learning start optimization
c0:1
With stop optimization, max. setback
time offset 1 h
With stop optimization, max. setback
time offset 2 h
c0:2
“Stop optimization of setback time offset”
c1:0
With remote control:*1
Without shutdown time optimization
“Learning shut-down time optimization”
c2:0
With remote control:*1
Without learning shutdown time
optimization
“Mixing valve runtime”
c3:125
Only for heating circuits with mixing
valve:
Mixing valve runtime 125 sec
“System dynamics mixing valve”
c4:1
System dynamics:
Mixing valve control characteristics
c1:1
to
c1:12
With stop optimization of setback time
offset adjustable from 10 to 120 min.
1 step 10 min
c2:1
With learning shut-down time
optimization
c3:10
to
c3:255
Adjustable from 10 to 255 sec
c4:0
to
c4:3
Controller responds too quickly (cycles
between “Open” and “Closed”):
Select a lower value.
Controller responds too slowly
(temperature is not held sufficiently):
select a higher value.
114
5513 463 - 06
*1 Only change the coding for the heating circuit without mixing valve A1 for boilers without lower temperature
limit or for heating circuits with mixing valve if a remote control is connected to them.
Coding level 2
Vitotronic 300, GW6B Installation and Service
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
“Minimum supply temperature limit”
c5:20
Electronic minimum supply temperature
limit 68°F (20°C) (only when operating
with standard room temperature)
“Maximum supply temperature limit”
c6:75
Electronic maximum supply temperature
limit set to 167°F (75°C).
“Room influence limit”
c8:31
With remote control and for the heating
circuit, operation with room temperature
hook-up must be programmed:*1
No room influence limit
“External operating program changeover”
d5:0
With external operating program
changeover (observe setting of
coding “5d”, “5e”, “5f” and “91”
in the “General” group). Changeover
“Constant central heating with reduced
room temperature” or “Standby mode”
(subject to set reduced room temperature)
“EA1 extension: Operating program changeover”
d8:0
No operating program changeover
Possible change
c5:1
to
c5:127
Adjustable from 34 to 261°F
(1 to 127°C)
(limited by boiler specific coding)
c6:10
to
c6:127
Adjustable from 50 to 261°F
(10 to 127°C)
(limited by boilerspecific coding)
c8:1
to
c8:30
Adjustable from 1 to 30 K
d5:1
Changeover to “Constant operation
with standard room temperature”
d8:1
Operating program changeover via
input DE1
Operating program changeover via
input DE2
Operating program changeover via
input DE3
d8:2
d8:3
“Day temperature target”
e1:1
With remote control:
Set day value adjustable at the remote
control from, 50 to 86°F (10 to 30°C)
“Display correction of the actual room temperature”
e2:50
With remote control:
No display correction of the actual room
temperature
e1:0
Adjustable from 37 to 73°F (3 to 23°C)
e1:2
Adjustable from 63 to 99°F (17 to 37°C)
e2:0
to
e2:49
e2:51
to
e2:99
Display
to
Display
Display
to
Display
correction –5 K
correction –0.1 K
correction +0.1 K
correction +4.9 K
5513 463 - 06
*1 Only change the coding for the heating circuit without mixing valve A1 for boilers without lower temperature
limit or for heating circuits with mixing valve if a remote control is connected to them.
115
Coding level 2
“Heating Circuit ...” Group
Vitotronic 300, GW6B Installation and Service
(continued)
Coding in the factory set condition
“Time limit for comfort mode”
f2:8
Time limit for comfort mode or external
operating program changeover via
pushbutton: 8 h*2
Note: Observe setting of coding
“5d”, “5e”, “5f” in the “General”
group, as well as “d5” and “d8”
in the “Heating circuit...” group.
“Temperature limit for terminating reduced mode”
f8:–5
Temperature limit for terminating
reduced mode 23°F (–5°C), see
example on page 80.
Observe coding “a3”.
Possible change
f2:0
No time limit*2
f2:1
to
f2:12
Time limit adjustable from 1 to 12 h*2.
f8:+10
to
f8:–60
Adjustable from 50 to -76°F
(+10 to –60°C)
f8:–61
Function disabled
“Temperature limit for raising the reduced room temperature target”
f9:–14
Temperature limit for raising the reduced f9:+10
room temperature target 7°F (–14°C),
to
see example on page 80.
f9:–60
Limit for raising the set room
temperature to the value selected
for standard mode, adjustable from
50 to -76°F (+10 to –60°C).
“Raising the set boiler water or supply temperature when changing from operation with reduced room temperature
to operation with standard room temperature”
fa:20
Raising the set boiler water or
fa:0
Adjustable from 0 to 50%
supply temperature when changing
to
from operation with reduced room
fa:50
temperature to operation with standard
room temperature by 20%.
See example on page 80.
“Duration for raising the set boiler water or supply temperature”
fb:60
Duration for raising the set supply
fb:0
Adjustable from 0 to 300 min
temperature (see coding “fa”) 60 min.
to
See example on page 80.
fb:300
116
5513 463 - 06
*2 In the “Heating and DHW” operating program, comfort mode ends automatically when the system changes over
to operation with standard room temperature.
Vitotronic 300, GW6B Installation and Service
Diagrams
Connection and Wiring Diagram
Overview
5513 463 - 06
A1
A2
A3
A6
A7
A8
A9
A10
A11
A12
A13
X
PCB, extension for heating circuits 2 and 3 with mixing valve
PCB, low voltage
PCB 120 V~
Programming unit connection PCB
Optolink PCB/emissions test switch
PCB
Coding card
LON communication module
Power supply unit PCB
Programming unit ON/OFF switch
Programming unit
Electrical interfaces
117
Diagrams
Connection and Wiring Diagram
Vitotronic 300, GW6B Installation and Service
(continued)
PCB 120V~
sA
sK
sL
fÖ
fA
118
Heating circuit pump
or
Primary pump, primary store system
Circulation pump for tank heating (accessory)
DHW recirculation pump (on site)
Boiler circuit pump or distribution pump (on site)
Power supply, 120V/60 Hz
Burner
Output for central fault message
Motor for 3-way mixing valve, primary store
system
aBÖ
External connections (remove jumper when
connecting)
aBA
Safety chain (potential-free)
aBH
Power supply for accessories
F
MCB/fuse
K2-K10 Relay
S1
ON/OFF switch
X
Electrical interfaces
gÖ
gS
5513 463 - 06
sÖ
Diagrams
Vitotronic 300, GW6B Installation and Service
Connection and Wiring Diagram
(continued)
PCB, low voltage
!
?/§
%A
%B
5513 463 - 06
)
aG
aJA
Outdoor temperature sensor
Supply temperature sensor common system
supply temperature
Tank temperature sensor
Tank temperature sensor 2 for tank
loading system
Supply temperature sensor, low loss header
No function
No function
aJB
aVD
aVG
aVH
LON
S3
V1
V2
X
Temperature sensor tank loading system
External connections
KM BUS participants
External connections
Connecting cable for data exchange (accessories)
Emissions test switch
Fault indicator (red)
ON indicator (green)
Electrical interfaces
119
Diagrams
Vitotronic 300, GW6B Installation and Service
Mixing Valve Extension Circuits 2 & 3
PCB, extension for heating circuits 2 and 3 with mixing valve
120
Supply temperature sensors
Heating circuit pumps
Power supply
Mixing valve motors
Relay
Electrical interfaces
5513 463 - 06
?
sÖ
fÖ
gS
K1-K6
X
Components
Vitotronic 300, GW6B Installation and Service
Sensors
Viessmann NTC 10 kΩ (blue ID label)
Tank, supply and room temperature sensor
Note
Resistance in k ohms
H The supply temperature sensor can be used as a
contact or immersion temperature sensor.
H The room temperature sensor is connected at terminals
3 and 4 in the Vitotrol 300.
Installation and service instructions
Vitotrol 300
1. Pull corresponding plug.
2. Check the sensor resistance and compare it with the
curve.
3. In the case of severe deviation, check the installation
and replace the sensor if required.
Temperature
Viessmann NTC 10 kΩ
Outdoor temperature sensor
1. Pull plug !.
Resistance in k ohms
2. Check the sensor resistance across plug terminals “1”
and “2” and compare with the curve.
3. If the results are very different from the curve,
disconnect the wires from the sensor and repeat
the test on the sensor.
4. Depending on the result, replace the lead or the
outdoor temperature sensor.
5513 463 - 06
Temperature
121
Components
Vitotronic 300, GW6B Installation and Service
Extension EA1 Accessory (optional)
Duration of the heating program changeover
H Contact constantly closed:
The changeover is active as long as the contact
is closed.
H Contact only closed briefly via pushbutton:
The changeover is enabled for the time selected in
coding address “f2” in the “Heating circuit...” group.
DHW recirculation pump runtime for brief operation
The DHW recirculation pump can be started outside the
times when it is enabled according to the time program.
Digital data inputs DE1 to DE3
Functions:
H External heating program changeover,
separate for heating circuits 1 to 3
H External blocking
H External blocking with fault message input
H External demand with minimum boiler water
temperature
H Fault message input
H Brief operation of the DHW recirculation pump
When connecting external contacts, observe the
requirements of safety category II, i.e. 8.0 mm air-gap
and creep path or maintain a 2.0 mm insulation thickness
against ‘live’ parts.
Input function assignment
Select the input functions by means of the following
codes in the “General” group at the boiler control unit:
H DE1: Coding address “5d”
H DE2: Coding address “5e”
H DE3: Coding address “5f”
Assigning the heating program changeover
function to the heating circuits
The allocation of the heating program changeover to the
relevant heating circuit is selected via coding address
“d8” in the “Heating circuit...” group:
H Code “d8:1”: Changeover via input DE1
The DHW recirculation pump is started by closing the
contact at DE1, DE2 or DE3 by means of a pushbutton.
The runtime is adjusted via coding address “3d” in the
“General” group.
Analogue input 0–10V
The 0–10V hook-up provides an additional set boiler
water temperature:
0–1V Is taken as “no default for set boiler water
temperature”.
Note: Ensure DC separation between the LV output
and the ground conductor of the onsite voltage
source.
Coding address “1e” in the “General” group:
H “1e:0” ≙ temperature demand adjustable in the
range from 32 to 212°F (0 to 100°C) 1V ≙ 50°F
(10°C) set value change 10V ≙ 212°F (100°C)
set value change
H “1e:1” ≙ temperature demand adjustable in the
range from 86 to 248°F (30 to 120°C) 1V ≙ 86°F
(30°C) set value change 10V ≙ 248°F (120°C)
set value change
Output aBJ
Connection of a central fault messaging facility or
signalling reduced mode (reduction of the heating
circuit pump speed).
Select the function of output aBJ via coding address
“5c” in the “General” group.
Refer to the EA1 module Installation Instructions
H Code “d8:2”: Changeover via input DE2
H Code “d8:3”: Changeover via input DE3
122
5513 463 - 06
The effect of the heating program changeover is selected
via coding address “d5” in the “Heating circuit...” group.
Vitotronic 300, GW6B Installation and Service
Parts
5513 463 - 06
Parts List - Programming Module
123
Parts
Vitotronic 300, GW6B Installation and Service
124
5513 463 - 06
Parts List - Connection Module
Specification
Vitotronic 300, GW6B Installation and Service
Specification Vitotronic 300, GW6B
Rated voltage
120V~
Rated frequency
60 Hz
Rated current
12 A~
Power consumption
10 W
Safety category
I
Permissible ambient temperature - During operation 32 to 104°F (0 to +40°C)
Installation in living spaces or boiler
rooms (standard ambient conditions)
- During storage and transport -4 to 149°F (−20 to +65°C)
Rated relay output breaking capacity
Plug
sÖA1
Component
Heating circuit pump for
heating circuit A1
Rated
breaking
capacity
2A, 120V~
Primary pump, primary store
system [Primary pump, tank
loading system]
Multi boiler system
Single boiler
control unit
Cascade
control unit
Lag boiler
control unit
--
X
--
X
X
--
X
X
--
X
X
--
--
X
X
sA
Circulation pump for tank
heating [Circulation pump for
tank heating] (accessory)
2A, 120V~
sK
DHW recirculation pump
2A, 120V~
sL
Boiler circuit pump
or
Distribution pump
2A, 120V~
gÖ
Central fault message
2A, 120V~
X
X
X
gSA1
Motorized isolation valve
0.1A, 120V~
--
X
X
X
X
--
Motor, 3-way mixing valve,
tank loading system
Total
5513 463 - 06
Single boiler system
Max. 6A, 120V~
125
126
5513 463 - 06
Vitotronic 300, GW6B Installation and Service
5513 463 - 06
Vitotronic 300, Vitotronic 300, GW6B Installation and Service
127
5513 463 - 06
Technical information subject to change without notice.
Printed on environmentally friendly
(recycled and recyclable) paper.
Vitotronic 300, GW6B Installation and Service