Viessmann Vitotronic 300 GW6B, Vitotronic 300, GW6B Installation Instructions Manual

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Page 1

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

Certified as a component part for Viessmann boilers

5513 463 - 06 03/2015

Product may not be exactly as shown

IMPORTANT

Read and save these instructions for future reference.

Please file in Service Binder

Page 2

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.

For a listing of applicable literature,

please see section entitled “Important Regulatory and Safety Requirements”.

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

Please see section entitled

“Important Regulatory and Installation Requirements”.

Operating and Service Documentation

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.

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.

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

Order No. Z013557 Serial No. 7542124

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Vitotronic 300, GW6B Installation and Service

General

Table of Contents

Page

Safety, Installation and Warranty Requirements..............2

Product Information....................................................2

Safety

Preparing for Installation

Electrical Connections

About these Instructions.............................................5

For your Safety..........................................................6

Overview of System Example.......................................7

Designations in the Example.........................................7

System Examples........................................................8

Single boiler system...........................................8

Multi boiler system..........................................12

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 Inserting Cables and Applying Strain Relief

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 Connecting External Safety Equipment

Connections to Terminal 151………………………….……38

Provisional Burner Operation.......................................39

Blocking the Boiler Externally/Adding to the Boiler Sequence External Blocking via Switching Contact External Demand via Switching Contact External Demand via 0 – 10V Input External “Mixing Valve Closed”/”Mixing Valve Open” External Operating Program Changeover

Power Supply……………….....................................…45

Making the LON Connection

................................................................40

..............................27

.................28

.....................36

……………......…37

......................41

......................42

……..……...........…43

....43

......................44

………………………….…..…46

Commissioning

Service Scans

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Commissioning the System Adjusting Coding Connecting the Control Unit to the LON

Setting the Boiler Sequence at the Cascade Control Unit...52 Carrying Out an

Checking Sensors Adjusting the Heating Curve

Calling up the Service Menu Leaving the Service Menu Change Passwords

Resetting all Passwords to Factory Settings.................58

Scanning Operating Data Resetting Operating Data Brief Scan Maintenance Display

......................................................49

Actuator Test

.....................................................54

……………………………..……...........58

...............................................................60

........................................48

......................50

...................................53

……..............................…54

......................................57

..........................................58

...........................................59

.................................................61

Page 4

Table of Contents

Vitotronic 300, GW6B Installation and Service

Page

Troubleshooting

Function Description

Coding Levels

Coding Level 1

Coding Level 2

Fault Display Boiler System Fault Codes Burner Fault Codes

Boiler Water Temperature Control. Cascade Control Unit. Heating Circuit Control Unit DHW Tank Temperature Control

Calling up Coding Levels Resetting Coding to their Factory Set Condition

“General” Group “Combustion Controller” Group “Boiler” Group “Cascade” Group “DHW” Group “Solar” Group “Heating Circuit...” Group

............................................................62

.........................................63

....................................................69

..............................72

...............................................72

.......................................77

.................................81

............................................85

.......................................................86

..................................88

..........................................................88

......................................................89

..........................................................91

...........................................................91

..........................................92

.......................................................95

................................102

........................................................103

....................................................103

.........................................................106

.........................................................108

........................................111

............85

Diagrams

Components

Parts

Specification

Connection and Wiring Diagram EA1 Extension

Sensors. Extension EA1 Accessory (optional).

Parts List – Programming Module Parts List – Connection Module.

Specification Vitotronic 300, GW6B

........................................................120

................................................................121

................................117

..............................123

...............................124

.........................122

.........................125

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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.

Warnings draw your attention to the presence of

WARNING

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

CAUTION

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

IMPORTANT

potential hazards or important product information.



Cautions draw your attention to the presence of

potential hazards or important product information.



Helpful hints for installation, operation or maintenance

which pertain to the product.

Safety



This symbol indicates that additional, pertinent

information is to be found.



This symbol indicates that other instructions must

be referenced.

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Safety

For your Safety

CAUTION

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

Vitotronic 300, GW6B Installation and Service

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.

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Vitotronic 300, GW6B Installation and Service

Overview of System Example

Designations in the System Example

Preparing for Installation

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.

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Preparing for Installation

System Examples

ID: 4800078_1407_01 Single boiler system

Vitotronic 300, GW6B Installation and Service

Note: This schematic is a general example without shutoff valves or safety equipment. This does not replace the need for local engineering.

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Vitotronic 300, GW6B Installation and Service

System Examples (continued)

Required Devices ID: 4800078_1407_01

Position Equipment

1 2 3 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

eR eZ eU 4

rQ rW rE rR

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Boiler

Vitotronic 300 GW6B

Outdoor temperature sensor ATS

Boiler temperature sensor KTS (connection to burner control)

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

Preparing for Installation

Page 10

Preparing for Installation

System Examples (continued)

Vitotronic 300, GW6B Installation and Service

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Vitotronic 300, GW6B Installation and Service

System Examples (continued)

Preparing for Installation

ID: 4800078_1407_01

Group Coding address Function

General 00:8 Two heating circuits with mixing valve M2 (heating circuit 2) and

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M3 (circuit 3) DHW heating

Page 12

Preparing for Installation

System Examples (continued)

ID: 4800061_1407_01 Multi boiler system

Vitotronic 300, GW6B Installation and Service

Note: This schematic is a general example without shutoff valves or safety equipment. This does not replace the need for local engineering.

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Vitotronic 300, GW6B Installation and Service

System Examples (continued)

Required Devices ID: 4800061_1407_01

Position Equipment

1 2 3 4 5 6 8 9 rT uW uE uZ qP qW qQ qE qR qT rT uR uT uO qZ qU qI qO wP wW wE wQ

wE uU wR wZ wU wT

wU uI wI eE eR wO

eR eT

Boiler 1 Flue gas damper (for boiler I) Isolation valve Boiler temperature sensor KTS (connection to burner control) Common supply temperature sensor Outdoor temperature sensor ATS Vitotronic 300 GW6B Neutralization system Power switch Junction box Burner base Mixing valve adapter 24V Boiler II Isolation valve Mixing valve adapter 24V Boiler temperature sensor KTS (connection to burner control) Vitotronic 300 GW6B Neutralization system Power switch Junction box Burner base Flue gas damper (for boiler II) DHW DHW tank temperature sensor STS delivered with Vitotronic 300 DHW pump UPSB DHW re-circulation pump ZP Heating circuit I Heating circuit pump 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 pump 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 Heating circuit III (low-temperature heating circuit) Heating circuit pump M1 (heating circuit III) Mixing valve M1 (heating circuit III) 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

Preparing for Installation

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Page 14

Preparing for Installation

System Examples (continued)

Required Devices ID: 4800061_1407_01

Position Equipment

wI wO eR

eR eT

eZ eP

eQ eE rT

eO rP rQ zI zO

tP tW tE

zP zQ

zU uP eT uQ

Outdoor temperature sensor ATS (ATS-value can be taken from Vitotronic 300 GW6B master and cascade

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

Vitotronic 300, GW6B Installation and Service

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Vitotronic 300, GW6B Installation and Service

System Examples (continued)

Preparing for Installation

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Preparing for Installation

System Examples (continued)

Vitotronic 300, GW6B Installation and Service

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Vitotronic 300, GW6B Installation and Service

System Examples (continued)

Preparing for Installation

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Preparing for Installation

System Examples (continued)

Vitotronic 300, GW6B Installation and Service

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Vitotronic 300, GW6B Installation and Service

System Examples (continued)

Preparing for Installation

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Preparing for Installation

Vitotronic 300, GW6B Installation and Service

System Examples (continued)

ID: 4800061_1407_01

coding addresses Vitotronic 300, type GW6B; Lead boiler / Pos. 8

Group Coding address Function

General System Layout

Cascade Number of boilers in cascade

Cascade Boiler rotation

coding addresses Vitotronic 300 Type GW6B Pos. 14

General LON Participant Number

Boiler Boiler number in multiboiler system

coding addresses Vitotronic 200-H, type HK1B / Pos. 35

General 81:3 The control unit receives time

General 97:1 Control unit receives the outdoor temperature

00:8 Two heating circuits with mixing valve M2 (heating

circuit 2) and M3 (circuit 3) DHW heating

35:2 Number of boilers connected in the heating system

38:1 Boiler rotation - Monthly

77:2 LON Participant Number

07:2 Boiler number in multiboiler system

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Vitotronic 300, GW6B Installation and Service

Overview of Electrical Connections

Electrical Connections

WARNING

Incorrect wiring can lead to serious injury from electrical current and result in appliance damage.

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.

H Route low voltage leads and line voltage cables

separately.

H Strip the insulation from the cables as close to the

terminals as possible, and bundle tightly to the corresponding terminals.

H Secure cables with cable ties.

Connections on the low voltage PCB Plug Component Single boiler system

§/?

%A %B

)

aJA aJB

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Outdoor temperature sensor X X -Common supply temperature

sensor DHW tank temperature sensor X X --

DHW tank temperature sensor (bottom) in a tank loading system Common supply temperature sensor, low loss header Return temperature sensor T1 X X X

Temperature sensor tank loading system

Single boiler control unit

-- X --

XX--

X----

Multi boiler system

Cascade control unit Lag boiler control unit

Page 22

Electrical Connections

Overview of Electrical Connections (continued)

Connections on the low voltage PCB (continued) Plug Component Single boiler system

Single boiler control unit

aVD.1/aVD.2

aVD.2/aVD.3

aVG

aVH.2/aVH.3

LON LON communication module

External operating program changeover

External “mixing valve open” X -- -External blocking boiler -- -- X External blocking boiler X -- -Start the boiler externally

as the last one in the boiler sequence

External “mixing valve close” X -- -KM BUS participant

(accessory), e.g. EA1 extension

External demand via switching contact

for data exchange between control units, Vitocom and Vitogate

X----

-- -- X

XXX

XX--

XXX

Vitotronic 300, GW6B Installation and Service

Multi boiler system

Cascade control unit Lag boiler control unit

PCB connections 120V~ Plug Component Single boiler system

Single boiler control unit

sÖA1

sA sK sL fÖ fA gÖ gSA1

aBÖ

aBH

Connections on extension for heating circuit with mixing valve HC2/M2, HC3/M3 Plug Component Single boiler system

? M2/M3 sÖ M2/M3 gS M2/M3

Heating circuit pump for heating circuit A1 (high temp.)

Primary pump, primary store system

DHW pump X X --

DHW recirculation pump X X --

Boiler pump or system pump -- X X

Power supply X X X

Burner X X X

Central fault message X X X

Motorized isolation valve -- X X Motor, 3-way mixing valve,

tank loading system External safety equipment X X X Provisional burner operation X X X Power supply for accessories X X X

Single boiler control unit

Supply temperature sensor X X --

Heating circuit pump X X --

Mixing valve motor X X --

-- X --

XX--

Cascade control unit Lag boiler control unit

Multi boiler system

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Vitotronic 300, GW6B Installation and Service

Overview of Electrical Connections (continued)

Electrical Connections

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

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Fuse 250VAC 6.3A

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.

Page 24

Electrical Connections

Overview of Electrical Connections (continued)

Vitotronic 300, GW6B Installation and Service

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.

Top

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.

Bottom

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

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Page 25

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.

Electrical Connections

1. Flip down the front portion of the DIN rail fuse block.

2. Flip down the front side cover of the DIN rail fuse block.

3. Replace fuse.

4. Return the DIN rail

original postion.

mounted fuse block back to the

mounted

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Page 26

Electrical Connections

Boiler Control and Junction Box

Legend

A Junction box B Vitotronic control

C Vitocrossal 200 CM2 boiler

Vitotronic 300, GW6B Installation and Service

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.

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.

Mounting the Control Unit

Legend

A Cable retaining tab

Note: Route the ribbon cable through retainer A.

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Vitotronic 300, GW6B Installation and Service

Opening the Control Unit

Electrical Connections

Plugging in the Boiler Coding Card

Only use the boiler coding card supplied with the boiler junction box.

Insert the boiler coding card into slot “X7”, through the recess in the cover.

Coding card # Part #

1042 7543216

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Electrical Connections

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.

Vitotronic 300, GW6B Installation and Service

Legend

A Cables with moulded strain relief B On-site cables; strip up to 4 in. (100 mm) insulation

Connecting Sensors

Outdoor temperature sensor connection

2 wire cable, 18 AWG for a maximum length of 120 ft (36 m)

Connections on the low voltage PCB

Plug Component

§/? %A %B

) aJA aJB

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.

Outdoor temperature sensor

Common supply temperature sensor

Tank temperature sensor

Tank temperature sensor (bottom) in a tank loading system

Temperature sensor, low loss header

Return temperature sensor T1

Temperature sensor tank loading system

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Vitotronic 300, GW6B Installation and Service

Control Power Supply

Electrical Connections

Connecting the power supply to the Vitotronic control

For burner base unit, see boiler service instructions

Legend

A To the burner base unit B Connecting cable C To the Vitotronic control

Insert plug 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.

40/156

into the corresponding plug of the

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Page 30

Electrical Connections

Connecting the Burner

Legend

A To the Vitotronic control B To the burner (burner control unit) C KM BUS cable

Vitotronic 300, GW6B Installation and Service

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.

Connect plugs fA and aVG to the corresponding plugs in the Vitotronic control unit.

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Vitotronic 300, GW6B Installation and Service

Connecting Pumps

Electrical 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.

Pumps 120V Available pump connections

sÖM1/A1 Heating circuit 1 pump sÖM2 Heating circuit 2 pump sÖM3 Heating circuit 3 pump

sA DHW pump sK DHW recirculation pump

sL Boiler pump

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Available connections

Connections on extension for heating circuit with mixing valve HC2/M2, HC3/M3

Plug Terminal Component

sÖ M2 sÖ M3

Connections on the PCB 120V~

sÖA1

sA sK

5 L, N, G Heating circuit pump 6 L, N, G Heating circuit pump

9 L, N, G Heating circuit pump

for heating circuit A1 or Primary pump, primary store system

8 L, N, G DHW pump 7 L, N, G DHW recirculation

pump

10 L, N, G boiler pump, system

pump

Page 32

Electrical Connections

Connecting Pumps (continued)

Vitotronic 300, GW6B Installation and Service

120V pumps with an amperage draw of <2FLA

A Din rail (located in the junction box) B Pump

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

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Page 33

Vitotronic 300, GW6B Installation and Service

Connecting Pumps (continued)

Electrical Connections

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

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

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Page 34

Electrical Connections

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

Vitotronic 300, GW6B Installation and Service

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)

13 (L)

52M2 1 (L, N)

2 (L)

52M3 3 (L, N)

4 (L)

Legend

A DIN Rail (in junction box) B 120V Valve Actuator C Valve

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Page 35

Vitotronic 300, GW6B Installation and Service

Connecting Actuators (continued)

Electrical Connections

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: 24 VAC Rated current: max. 0.15 FLA

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

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.

Plug DIN terminals

52A1 12 (L, N)

13 (L)

52M2 1 (L, N)

2 (L)

52M3 3 (L, N)

4 (L)

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Page 36

Electrical Connections

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)

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.

Vitotronic 300, GW6B Installation and Service

CAUTION

Legend

aBÖ Connection for external equipment.

A Low water cut-off (typical)

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Page 37

Vitotronic 300, GW6B Installation and Service

Connecting External Safety Equipment

Electrical Connections

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

Note: Periphery equipment attached to the aBÖ plug must be operated on a normally closed circuit.

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Page 38

Electrical Connections

Connections to Terminal aBA

Vitotronic 300, GW6B Installation and Service

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

Legend

A DIN rail (junction box) B Auxiliary low gas pressure switch or external shut-off (dry contact)

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Page 39

Vitotronic 300, GW6B Installation and Service

Provisional Burner Operation

Electrical Connections

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)

T6 - Common T7 - Modulating Down T8 - Modulating Up

Legend

C To burner interface

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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.

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.

Page 40

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

aVD.1/aVD.2

aVD.2/aVD.3

H The boiler is blocked and has been removed

from the 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.

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.

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Page 41

Vitotronic 300, GW6B Installation and Service

External Blocking via Switching Contact

Electrical Connections

Plug aVD.2/aVD.3

Legend

A Floating contact B Plug aVD of the control unit

EA1 extension

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.

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.

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.

Legend

A Floating contact B EA1 extension

EA1 extension Set “5d” (DE1), “5e” (DE2) or “5f” (DE3) in the “General” group to 3 or 4.

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Page 42

Electrical Connections

External Demand via Switching Contact

Vitotronic 300, GW6B Installation and Service

Plug aVH.2/aVH.3

146

Legend

A Floating contact B Plug aVH of the control unit

EA1 extension

Only for single boiler and cascade control units

Connection options:

H Plug aVH.2/aVH.3

H EA1 extension (accessory, see page 122)

Contact closed:

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.

Legend

A Floating contact B EA1 extension

Coding

Plug aVH No coding change required

EA1 extension Set “5d” (DE1), “5e” (DE2) or “5f” (DE3) in group “General” to 2.

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Page 43

Vitotronic 300, GW6B Installation and Service

External Demand via 0 –10V Input

Electrical Connections

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 Set value 50°F (10°C) 10V Set value 212°F (100°C) Observe coding “1E” in the “General” group.

Optional setting range 0 –1V No default set supply temperature 1V Set value 86°F (30°C) 10V Set value 248°F (120°C) Observe coding “1E” in the “General” group.

No default set supply temperature

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.

Legend

A External “mixing valve open” (floating contact) B External “mixing valve close” (floating contact)

External “mixing valve close” With coding “99” in the “General” group assign the function to the heating circuits.

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Page 44

Electrical Connections

External Operating Program Changeover

Vitotronic 300, GW6B Installation and Service

Plug aVD

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.

Legend

A Dry contact (potential free) B EA1 extension

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)

Connection Note: ‘Live’ contacts lead to short circuits or phase failure.

The external connection must be potential-free.

Preselected operating program (Contact open)

Central heating OFF/ DHW OFF

Central heating OFF/ DHW heating ON

Central heating ON/ DHW heating ON

Coding Changed operating

program (Contact closed)

“d5:0” in the “Heating circuit ...” group (Factory set condition)

“d5:1” in the “Heating circuit ...” group

Constant operation with reduced room temperature/ DHW heating OFF

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.

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.

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Page 45

Vitotronic 300, GW6B Installation and Service

Power Supply

Electrical Connections

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/DC-

sensitive RCD, type B 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.

, for DC (fault) currents

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

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Connect the power supply and implement all safety measures (e.g. RCD circuit) in accordance with local and national codes.

Page 46

Electrical Connections

Making the LON Connection

Vitotronic 300, GW6B Installation and Service

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)

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

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Page 47

Vitotronic 300, GW6B Installation and Service

Making the LON Connection (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

Electrical Connections

Connection with on-site cable and LON plug

≤ 3000 ft.

The line may be up to ≤ 3000 ft. (900 m) (with LON plug)

Legend

A Control unit or Vitocom B On-site cable C Terminator D LON plug E Up to 30 participants

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Page 48

Commissioning

Commissioning the System

Vitotronic 300, GW6B Installation and Service

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

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.

and “Setup” appear.

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 Tap and check the fault messages.

- ‘single boiler’

- ‘lead boiler + cascade’

- ‘lag boiler’

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.

appears in the footer.

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Page 49

Vitotronic 300, GW6B Installation and Service

Commissioning

Commissioning the System (continued)

Coding are show in the “Setup” menu in the following order: Function Group Coding

“Max operational output” “Combustion controller” 02 “Gas type” 03 “Altitude” 04 “Design” 0a “System design” “General” 00 “Consecutive boiler number in multi boiler systems” “Boiler” 07 “Number of boilers connected to the cascade” “Cascade” “Cascade” 35 “LON participant number” “General” 77 “Control strategy” “Cascade” 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 Group Coding

“Connection at plug 20A1” “General” 4c “With LON communication module”

(control unit is fault manager) “Viessmann system number” “General” 98 “With LON communication module:

Monitoring LON participants”

“General” 79

“General” 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 Group Coding

On all control units “Single boiler and multi boiler system” “Boiler” 01 “Connection at plug 29” “General” 4d “Viessmann system number” “General” 98 “With LON communication module:

Monitoring LON participants”

Only on cascade control units “Connection at plug 20A1” “General” 4c “Connection at plug 29” “General” 4d “Connection at plug 52A1” “General” 4e “With LON communication module”

(control unit is fault manager) “Central control of heating circuits” “General” 7a “Viessmann system number” “General” 98 “With LON communication module:

Monitoring LON participants” “Permanent last boiler” “Cascade” 3a “Permanent lead boiler” “Cascade” 39 “Storage tank heating, hysteresis” “DHW” 55

“General” 9c

“General” 79

“General” 9c

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Page 50

Commissioning

Connecting the Control Unit to the LON

Example of a single boiler system with Vitotronic 200-H and Vitocom

Vitotronic 300, GW6B Installation and Service

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.

A Single boiler control unit B Vitotronic 200-H C Vitocom D LON

All coding in the table are listed in the "General" group.

ABC

Participant no. 1, Coding “77:1”

Control unit is fault manager, Coding “79:1”

Control unit transmits the time, Coding “7b:1”

Control unit sends outdoor temperature, Coding “97:2”

Viessmann system number, Coding “98:1”

LON participant fault monitoring, Coding “9c:20”

Participant no. 10, Coding “77:10”

Control unit is not fault manager, Coding “79:0”

Control unit receives the time, Set coding “81:3”

Control unit receives outdoor temperature, Set coding “97:1”

Viessmann system number, Coding “98:1”

LON participant fault monitoring, Coding “9c:20”

Participant no. 99

Appliance is fault manager

Device receives the time

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Page 51

Vitotronic 300, GW6B Installation and Service

Connecting the Control Unit to the LON (continued)

Example of a multi boiler system

Commissioning

A Lag boiler control unit B Lag boiler control unit C Cascade control unit

ABCDE

Multi boiler system Set coding “01:2” in the “Boiler” group

Boiler number 3 Set coding “07:3” in the “Boiler” group

-- -- Number of connected

Participant no. 3. Coding “77:3” in the “General” group

Control unit is not fault manager. Coding “79:0” in the “General” group

-- -- Control unit transmits

-- -- The control unit

Viessmann system number, Coding “98:1” in the “General” group.

LON participant fault monitoring Coding “9c: 20” in the “General” group

Multi boiler system Set coding “01:2” in the “Boiler” group

Boiler number 2 Set coding “07:2” in the “Boiler” group

Participant no. 2. Set coding “77:2” in the “General” group

Control unit is not fault manager. Coding “79:0” 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

Multi boiler system Set coding “01:2” in the “Boiler” group

Boiler number 1 Set coding “07:1” in the “Boiler” group

boilers Set coding “35:1” to “35:8” in the “Cascade” group

Participant no. 1. Coding “77:1” in the “General” group

Control unit is fault manager. Coding “79:1” in the “General” group

the time. Coding “7b:1” in the “General” group

sends the outdoor temperature. Coding “97:2” 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

D Vitotronic 200-H E Vitocom F LON system

-- --

Participant no. 10. Coding “77:10” in the “General” group

Control unit is not fault manager. Coding “79:0” in the “General” group

The control unit receives the time. Set coding “81:3” 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.

LON participant fault monitoring Coding “9c: 20” in the “General” group

Participant no. 99

Appliance is fault manager

Device receives the time

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Page 52

Commissioning

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”.

Vitotronic 300, GW6B Installation and Service

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.

H At least the lead boiler remains in operation when all

boilers in a system would otherwise be blocked via the

ECO threshold.

Tap the following buttons:

1. “Menu”

2. “Boiler sequence”

3. Select the required boiler sequence and confirm with “OK”.

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Page 53

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).

Display Explanation

“All actuators” OFF All actuators have been switched off.

“Output 20” ON

“Output 52” Open

“Output 52” Neutral

“Output 52” Close

“DHW tank primary pump” ON

“DHW circ pump” ON

“Output 29” ON

“Central fault message” ON

“Htg circ pump HC2” ON

“Mixing valve HC2” Open

“Mixing valve HC2” Close

“Htg circ pump HC3” ON

“Mixing valve HC3” Open

“Mixing valve HC3” Close

“EA1 output 1” ON

“AM1 output 1” ON Actuator at output A1

“AM1 output 2” ON Actuator at output A2

“Solar circuit pump” ON

“Solar circ pump min” ON

“Solar circ pump max” ON

“SM1 output 22” ON

Actuator at output sÖ A1 Actuator at output gS A1 Actuator at output gS A1 Actuator at output gS A1 Actuator at output sA Actuator at output sK Actuator at output sL Central fault message facility at output gÖ Actuator at output sÖ M2 Actuator at output gS M2 Actuator at output gS M2 Actuator at output sÖ M3 Actuator at output gS M3 Actuator at output gS M3 Contact “P - S” on plug aBJ of EA1 extension closed.

“Solar circuit pump” On Solar circuit pump at output sF at solar control module, type SM1

“Solar circ pump min” On Solar circuit pump at output sF at solar control module, type SM1 set to min. speed.

“Solar circ pump min” On Solar circuit pump at output sF at solar control module, type SM1 set to max. speed.

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).

Commissioning

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Page 54

Commissioning

Checking Sensors

Adjusting the Heating Curve

Vitotronic 300, GW6B Installation and Service

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.

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.

Slope

Boiler water or supply

temperature

Room set-point

temperature

For outdoor temperature 7°F (−14°C)

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

Outdoor temperature

Settings in the factory set condition:

H Slope = 1.4

H Shift = 0

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Page 55

Vitotronic 300, GW6B Installation and Service

Adjusting the Heating Curve (continued)

Commissioning

Standard set room temperature

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”

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

Reduced set room temperature

Adjustment of the reduced set room temperature from 37 to 52°F (3 to 14°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”

Changing the standard set room temperature

Refer to the Operating Instructions

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Page 56

Commissioning

Adjusting the Heating Curve (continued)

Boiler water or

supply temperature

Vitotronic 300, GW6B Installation and Service

Changing the slope and shift

Individually adjustable for each heating circuit.

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”

Outdoor temperature

Legend

A Changing the slope B Changing the shift (vertical parallel offset of the

heating curve)

6. Tap OK to confirm

Example: Heating curve setting with slope 1.5:

5513 463 - 06

Page 57

Vitotronic 300, GW6B Installation and Service

Calling up the Service Menu

Service Scans

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”

Page 58

Service Scans

Leaving the Service Menu

Change Passwords

Vitotronic 300, GW6B Installation and Service

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.

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.

8. Confirm twice with OK.

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Page 59

Vitotronic 300, GW6B Installation and Service

Scanning Operating Data

Resetting Operating Data

Service Scans

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”.

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"

6. Select required value or "All details".

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Page 60

Service Scans

Brief Scan

Vitotronic 300, GW6B Installation and Service

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. with the following tables.

for the required brief scan in line

123456

1: System schemes 01 to 10 Control unit software version Software version, programming unit 2: 0 0 0 Appliance identification CU-ID 3: 0 0 Number of KM BUS participants Software version

Solar control module type SM1 4:000000 5:0000Software version,

AM1 extension

6: Connection on

plug aVD.1/2 0: Contact open 1: Contact closed

7: LON subnet address/system number LON node address

8: SNVT config.

0: Auto 1: Tool

Heating circuit HC1 Heating circuit HC2 Heating circuit HC3

9: Remote control

0: Without 1: Vitotrol 200A

2: Vitotrol 300A 10:000000 11: 0 0 Software

Connection on plug aVD.2/3 0: Contact open 1: Contact closed

Software version Communic. coproc.

Software version Remote control

0000

Connection on plug aVD.2/3 Neuron Chip Software version

Remote control 0: Without 1: Vitotrol 200A 2: Vitotrol 300A

version, extension for heating circuits 2 and 3 with mixing valve Note: The displays in fields 3 and 5 are the same.

Software version Remote control

0 Software

Participant number

Remote control 0: Without 1: Vitotrol 200A 2: Vitotrol 300A

version, extension for heating circuits 2 and 3 with mixing valve

Software version, EA1 extension

Software version Remote control

5513 463 - 06

Page 61

Vitotronic 300, GW6B Installation and Service

Maintenance Display

Service Scans

Set limits in coding “21” and “23” in the “Boiler” group. Once these values have been reached, “Service” and symbol

Tap the following buttons:

1. “Confirm” The footer shows

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”

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”.

appear on the display.

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Page 62

Troubleshooting

Fault Display

Vitotronic 300, GW6B Installation and Service

In the event of a fault, the red fault display flashes at the 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:

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.

and “Fault”.

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

6. Tap “Reset” to delete the list.

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Page 63

Vitotronic 300, GW6B Installation and Service

Boiler System Fault Codes

Troubleshooting

Displayed fault code

0f Control mode. Service “0f” is only displayed in

10 Operates as if the outdoor

18 Operates as if the outdoor

20 Standalone control unit without

28 Standalone control unit without

30 H With DHW tank: DHW pump

38 H With DHW tank: DHW pump

40 Mixing valve is being closed. Short circuit, supply temperature

44 Mixing valve is being closed. Short circuit, supply temperature

48 Mixing valve is being closed. Lead break, supply temperature

4c Mixing valve is being closed. Lead break, supply temperature

System characteristics Cause Measures

the fault history.

Short circuit, outdoor

temperature was 32°F (0°C).

supply temperature sensor (possibly supply temperature not high enough)

ON, boiler is maintained at set tank temperature.

H Without DHW tank: Boiler is

regulated by the temperature controller.

ON, boiler is maintained at set tank temperature.

H Without DHW tank: Boiler is

regulated by the temperature controller.

temperature sensor.

Lead break, outdoor temperature sensor.

Short circuit, common supply temperature sensor

Lead break, common supply temperature sensor

Short circuit, boiler water temperature sensor

Lead break, boiler water temperature sensor

sensor, heating circuit with mixing valve M2 (heating circuit 2).

sensor, heating circuit with mixing valve M3 (heating circuit 3).

sensor, heating circuit with mixing valve M2 (heating circuit 2).

sensor, heating circuit with mixing valve M3 (heating circuit 3).

Service required

Note: After servicing, set code “24:0”.

Check outdoor temperature sensor (see page 121).

Check the supply temperature sensor (see page 121).

Check boiler water temperature sensor.

Check supply temperature sensor (see page 121).

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Page 64

Troubleshooting

Boiler System Fault Codes (continued)

Vitotronic 300, GW6B Installation and Service

Displayed fault code

50 Tank loading pump on:

51 With tank loading system:

52 Control mode Short circuit, supply temperature

58 Tank loading pump on:

59 With tank loading system:

5a Control mode Lead break, low loss header

60 Boiler with maximum

68 Boiler with maximum

System characteristics Cause Measures

Short circuit, tank temperature 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.

Tank heating is started and stopped via tank temperature sensor 1.

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.

Tank heating is started and stopped via tank temperature sensor 1.

temperature, no output reduction, mixing valve return temperature control open

sensor 1

Short circuit, DHW tank

temperature sensor 2.

sensor low loss header.

Lead break, DHW tank

temperature sensor 1.

Lead break, DHW tank

temperature sensor 2.

supply temperature sensor.

Short circuit, temperature

sensor aJA.

Lead break, temperature

sensor aJA.

Check tank temperature sensor (see page 121).

Check the DHW tank temperature sensor (see page 121).

Check supply temperature sensor (see page 121).

Check DHW tank temperature sensor (see page 121).

Check supply temperature sensor (see page 121). Without supply temperature sensor: Set code “52:0” in the “General” group.

Check temperature sensor (see page 121).

Check temperature sensor (see page 121). Without temperature sensor: Set coding “4a:0” in the “General” group.

5513 463 - 06

Page 65

Vitotronic 300, GW6B Installation and Service

Boiler System Fault Codes (continued)

Troubleshooting

Displayed fault code

70 Shunt pump constantly ON.

78 Shunt pump constantly ON

90 Control mode Short circuit, temperature sensor

91 Control mode Short circuit, temperature sensor

92 No solar DHW heating. Short circuit, collector

93 Control mode. Short circuit, temperature sensor,

94 No solar DHW heating. Short circuit, DHW tank

System characteristics Cause Measures

Short circuit, temperature With tank loading system: close 3-way mixing valve; no DHW heating

With tank loading system: close 3-way mixing valve; no DHW heating

sensor aJB.

Lead break, temperature

sensor aJA.

/ connection at solar control

module, type SM1.

aÖ, connection at solar control

module, type SM1.

temperature sensor, connection

of temperature sensor & at solar

control module, type SM1 or

sensor at S1 of the Vitosolic.

connection at S3 of the Vitosolic.

temperature sensor, connection

of temperature sensor % at solar

control module, type SM1 or

sensor at S2 of the Vitosolic.

Check temperature sensor (see page 121).

Check temperature sensor (see page 121). Without temperature sensor: Set code “4b:0” in the “General” group.

Check temperature sensor / (see separate installation and service instructions).

Check temperature sensor aÖ (see separate installation and service instructions).

Check sensor at the solar control unit (see separate installation and service instructions).

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Page 66

Troubleshooting

Boiler System Fault Codes (continued)

Vitotronic 300, GW6B Installation and Service

Displayed fault code

98 Control mode Lead break, temperature sensor

99 Control mode Lead break, temperature sensor

9a No solar DHW heating. Lead break, collector temperature

9b Control mode Lead break, temperature sensor,

9c No solar DHW heating. Lead break, DHW tank temperature

9e Control mode No supply rate in solar circuit or

9f Control mode Fault, solar control module, type

a7 Control mode Programming unit fault Replace the programming unit.

ab Control mode, DHW tank may be

System characteristics Cause Measures

Check temperature sensor / (see separate installation and service instructions). Check coding address “20” in the “Solar” group.

Check temperature sensor aÖ (see separate installation and service instructions). Check coding address “20” in the “Solar” group.

Check sensor at the solar control unit (see separate installation and service instructions).

Check solar circuit. Acknowledge fault message (see separate installation and service instructions).

Check solar control unit (see separate installation and service instructions).

Insert plug aJB and check codes.

cold

/, connection at solar control

module, type SM1.

aÖ, connection at solar control

module, type SM1.

sensor, connection of

temperature sensor & at solar

control module, type SM1 or

sensor at S1 of the Vitosolic.

connection to S3 of the Vitosolic.

sensor, connection of

temperature sensor % at solar

control module, type SM1 or

sensor at S2 of the Vitosolic.

flow rate too low, or temperature

limiter has responded.

SM1 or Vitosolic

Displayed if a fault occurs at

these devices that has no fault

message in the Vitotronic.

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.

5513 463 - 06

Page 67

Vitotronic 300, GW6B Installation and Service

Boiler System Fault Codes (continued)

Troubleshooting

Displayed fault code

b1 Control mode Communication error,

b5 Control mode Internal fault Check PCB is plugged in

b6 Constant mode Invalid hardware recognition Check coding address “92” in

b7 Boiler water temperature control Coding card fault Plug in or replace the boiler

ba Mixing valve close Communication error, PCB,

bc Control mode without

bd Control mode without

be Control mode without

bf Control mode

c1 Boiler cools down External safety equipment at plug

c2 Control mode Lead break, KM BUS to solar

System characteristics Cause Measures

Check connections, and replace

remote control.

remote control

No communication via LON

programming unit

extension for heating circuits 2

and 3 with mixing valve.

Communication error, Vitotrol

remote control unit, heating

circuit without mixing valve A1

(heating circuit 1).

Communication error, Vitotrol

remote control unit, heating

circuit with mixing valve M2

(heating circuit 2)

Communication error, Vitotrol

remote control unit, heating

circuit with mixing valve M3

(heating circuit 3)

Incorrect LON communication

module.

aBÖ.

control module, type SM1 or

Vitosolic.

the programming unit if required.

correctly.

the “General” group;

H 161: Single boiler system

H 190: Cascade control unit

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.

coding card (see page 25).

Check that the PCB and ribbon cable are plugged in correctly, and replace PCB if required.

Check connections, lead (see separate installation and service instructions) and coding address “a0” in the “Heating circuit...” group.

Replace LON communication module.

Check connection and external safety equipment (see page 36 and 37)

Check KM BUS cable and appliance. Without solar control unit: Set code “54:0” in the “General” group.

5513 463 - 06

Page 68

Troubleshooting

Boiler System Fault Codes (continued)

Vitotronic 300, GW6B Installation and Service

Displayed fault code

c3 Control mode Communication error, AM1

cF Control mode

d3 Control mode Communication error, extension

d4 Boiler cools down MCB F2 has responded. Check MCB F2 and jumper

d6 Control mode Input DE1 at extension EA1

d7 Control mode Input DE2 at extension EA1

d8 Control mode Input DE3 at extension EA1

da Control mode without

db Control mode without

dc Control mode without

dd Control mode without

de Control mode without

df Control mode without

System characteristics Cause Measures

Check connections.

No communication via LON.

room influence.

room influence

room influence.

extension

Communication error, control unit LON communication module.

EA1.

reports a fault.

Short circuit, room temperature sensor, heating circuit without mixing valve A1 (heating circuit 1).

Short circuit, room temperature sensor, heating circuit with mixing valve M2 (heating circuit 2).

Short circuit, room temperature sensor, heating circuit with mixing valve M3 (heating circuit 3).

Lead break, room temperature sensor, heating circuit without mixing valve A1 (heating circuit 1).

Lead break, room temperature sensor, heating circuit with mixing valve M2 (heating circuit 2).

Lead break, room temperature sensor, heating circuit with mixing valve M3 (heating circuit 3).

Without AM1 extension: Set coding “32:0” in the “General” group.

Check LON communication module and replace if required. If no LON communication module is installed, set code “76:0” in the “General” group.

Check connections (see page

122). Without extension EA1: Set code “5b:0” in the “General” group.

on plug aBA.

Remove fault at appliance concerned.

Check room temperature sensor (see page 121).

5513 463 - 06

Page 69

Vitotronic 300, GW6B Installation and Service

Burner Fault Codes

Troubleshooting

Displayed fault code

d1 Boiler cools down Burner fault Check the burner.

d5 Boiler ramps to the electronic

E1 Burner control unit in a fault

E2 Burner control unit in

E3 Burner control unit in a fault

E4 Burner shuts down Multiple detection of

E5 Burner control unit in

EE Burner control unit in a fault

EF Burner control unit in a fault

E0 Operation according to internal

F1 Burner control unit in a fault

F2 Burner control unit in a fault

F3 Ionization flame monitor reports

System characteristics Cause Measures

maximum boiler water temperature limit.

state.

a fault state.

Shortage of gas to gas pressure switch 2; valve leak test.

state.

a fault state.

state.

burner control unit defaults.

state; system cools down.

faulty flame signal during startup or after the post-purge.

No communication between boiler circuit and cascade control unit

Valve 1 not tight / gas pressure switch 2 does not open.

Valve 2 not tight; gas pressure switch 2 does not close.

Gas valve does not open; gas valve leaking; gas pressure switch 2 faulty.

Lead break, strapping plug fJ. Check strapping plug fJ.

undervoltage with return and renewed undervoltage.

Internal fault of the burner control unit and during test of ionization input.

Internal error in feedback from gas safety valves; output relay does not respond.

Communication error, burner control unit.

Flue gas excess temperature; excessive gas throughput.

Excessive boiler water temperature.

Gas valve not gas tight (gas is escaping and burning); incorrect coding card.

Check communication by means of a participant check.

Check setting of gas pressure switch 2; check connecting cable; replace gas valve.

Replace gas valve.

Check the power supply.

Replace burner control unit.

Reset burner control unit; replace burner control unit.

Check plug and KM BUS to burner control unit.

Wait until temperature falls below the permissible flue gas temperature. Reset burner control unit. Check water level; check heat exchanger surfaces for contamination; check CO setting; set gas throughput according to rated heating output of boiler (for connection values, see boiler service instructions).

Wait until temperature falls below the permissible boiler water temperature. Reset burner control unit.

Check ionization path; replace coding card; replace gas valve.

5513 463 - 06

Page 70

Troubleshooting

Burner Fault Codes (continued)

Vitotronic 300, GW6B Installation and Service

Displayed fault code

F4 No flame formation during safety

F5 Air pressure switch shows no air

F6 Gas pressure switch notifies no

F7 Fan pressure is produced during

F8 Flame extinguishes during

System characteristics Cause Measures

time; ionization flame monitor reports no flame signal.

No flame formation during safety time; ionization flame monitor reports no flame signal.

Poor start-up characteristics; rotary damper does not close.

Flame does not build during the safety time, no signal captured by the ionization flame monitor.

pressure, fan not running.

Air pressure switch switches off during operation.

gas pressure.

the air pressure switch idle state check.

Air pressure switch contact is not in the idle state.

operation.

Flame extinguishes during operation.

Ionization electrode incorrectly adjusted; ionization electrode not plugged in. Ground leakage of electrode or cable.

Ignition electrodes incorrectly adjusted, electrodes grounded, faulty ignition unit, faulty burner control unit.

Insulation body of ignition or ionization electrode cracked.

Servomotor faulty, servomotor connecting cable faulty, output relay faulty (burner control unit).

Incorrect gas type selected. Select gas type (see boiler

Gas valve does not open. Check connecting cable; check

Combustion characteristics not ideal.

Air pressure switch is faulty, incorrectly connected or incorrectly set.

Flue gas back pressure; condensate banked up; air pressure switch hose faulty; connecting hose leaking.

Gas shut-off valve closed; gas pressure switch faulty; multiple problems with gas supply.

Wind influence on fan. Check the flue draught (chimney)

Air pressure switch faulty. Replace the air pressure switch.

Incorrect gas type selected. Select gas type (see boiler service

Burner gauze assembly faulty. Check burner gauze assembly;

Combustion characteristics not ideal.

Insert plug of ionization electrode; check cables; adjust ionization electrode (see boiler service instructions)

Adjust ignition electrodes (see boiler service instructions); replace ignition unit; replace burner control unit.

Replace ignition or ionization electrode

Replace connecting cable; replace servomotor; replace burner control unit.

service instructions).

gas valve and replace if required.

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).

Replace air pressure switch, connect or set correctly.

Remove flue gas back pressure; check if condensate banked up; reset burner control unit; replace hose.

Open gas shut-off valve; check gas flow pressure; replace gas filter if required; reset burner control unit; replace gas valve.

instructions).

replace if damaged.

Adjust burner (see boiler service instructions).

5513 463 - 06

Page 71

Vitotronic 300, GW6B Installation and Service

Burner Fault Codes (continued)

Troubleshooting

Displayed fault code

F9 Fan not running; fan speed not

Fa Fan runs without demand; burner

Fd Burner control unit in a fault

80 Burner control unit in a fault

81 Burner control unit in a fault

82 Burner control unit in a fault

83 Burner control unit in a fault

88 Burner control unit in a fault

89 Burner control unit in a fault

b8 Constant mode Lead break, flue gas temperature

System characteristics Cause Measures

Fan faulty; cables are faulty or

reached.

Status duration too long, fan ramp-up.

Varying fan speed

No fan feedback. Fan faulty, external fan power

control unit in a fault state.

state; system cools down; burner control unit locked out.

state.

state; system cools down; burner control unit locked out.

state.

broken.

Internal fault; fan cannot reach its set value.

Fan faulty, cable a-ÖA faulty or broken. Check cable a-ÖA; check external power supply; replace the cable or fan; remove foreign bodies.

supply not connected or faulty cable a-ÖA or cable broken, fan blocked (poss. by foreign bodies).

Fan does not reach idle state, cable a-ÖA faulty, fan faulty, faulty burner control unit.

Burner control unit in a fault state.

Short circuit, boiler water temperature sensor, burner control unit.

Sensor drift, boiler water temperature sensor, burner control unit.

Short circuit, flue gas temperature sensor (A or B), burner control unit.

Sensor drift, flue gas temperature sensor (A or B), burner control unit.

Lead break, boiler water temperature sensor, burner control unit.

Lead break, flue gas temperature sensor (A or B), burner control unit.

sensor

Check cables and replace the fan if required

Replace fan or burner control unit.

Check cable; replace cable a-ÖA or fan.

Check cable a-ÖA; check external power supply; replace cable or fan; remove foreign bodies.

Fan subject to wind influence, check flue outlet and fan, replace cable a-ÖA, replace fan, replace burner control unit.

Read off fault at the burner control unit display and programming unit (boiler service instructions).

Check lead and dual sensor; replace sensor if required.

Check lead and sensors (A or B), replace sensor if required.

Check lead and sensors (A and B), replace sensor if required.

Check lead and dual sensor; replace sensor if required.

Check lead and sensors (A and B), replace sensor if required.

Remove temperature sensor. Set code “1f:0” in the “Boiler” group.

Fault message to the burner control unit:

Refer to the Boiler Service Instructions

Note: If LON participant faults occur, “Fault participant” ... is displayed.

5513 463 - 06

Page 72

Function Description

Boiler Water Temperature Control

Vitotronic 300, GW6B Installation and Service

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)

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).

5513 463 - 06

Page 73

Vitotronic 300, GW6B Installation and Service

Cascade Control Unit (continued)

Function Description

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 The cascade control specifies the set boiler water

temperature for all currently active boilers. Every boiler control unit regulates to the specified set value.

The following control strategies are available:

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.

5513 463 - 06

H Without and with supply temperature sensor

(see the following table).

H The control strategy is set automatically to

conventional boiler strategy 2, coding “3c:2” in the “Cascade” group (see page 79).

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.

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.

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).

Page 74

Function Description

Cascade Control Unit (continued)

Vitotronic 300, GW6B Installation and Service

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%)

Starting

Shutdown

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Vitotronic 300, GW6B Installation and Service

Cascade Control Unit (continued)

Function Description

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)

Starting

Shutdown

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Page 76

Function Description

Cascade Control Unit (continued)

Vitotronic 300, GW6B Installation and Service

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.

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)

Starting

Shutdown

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Vitotronic 300, GW6B Installation and Service

Heating Circuit Control Unit

Function Description

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.

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.

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Function Description

Heating Circuit Control Unit (continued)

Vitotronic 300, GW6B Installation and Service

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

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.

H The actual room temperature exceeds the value set in coding “b5” 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.

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Page 79

Vitotronic 300, GW6B Installation and Service

Heating Circuit Control Unit (continued)

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

Supply temperature

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

Function Description

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.

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.

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Page 80

Function Description

Heating Circuit Control Unit (continued)

Vitotronic 300, GW6B Installation and Service

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.

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

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.

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Vitotronic 300, GW6B Installation and Service

DHW Tank Temperature Control

Function Description

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

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.

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.

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Page 82

Function Description

DHW Tank Temperature Control (continued)

Vitotronic 300, GW6B Installation and Service

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”).

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”)

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Page 83

Vitotronic 300, GW6B Installation and Service

DHW Tank Temperature Control (continued)

Function Description

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:

H The set boiler water temperature is reset to the

weather-compensated set value.

H The DHW pump stops immediately when the 3-way

mixing valve is fully opened.

H The DHW pump stops after expiry of the delay off time

that is selected at coding “62”.

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”).

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 common set supply temperature is set 20 K higher

than the set DHW temperature (adjustable via coding “60”).

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 circulation pump stop times to prevent the set DHW temperature being substantially exceeded after the tank has been heated up.

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Page 84

Function Description

DHW Tank Temperature Control (continued)

Vitotronic 300, GW6B Installation and Service

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”

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.

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”.

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Vitotronic 300, GW6B Installation and Service

Calling up Coding Levels

Display for coding levels

Legend

A Coding B Number of coding C Value of coding D Coding description

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).

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.

6. Select group.

7. Select coding.

8. “Change”

for the required value in line with the following

tables.

Resetting Coding to their Factory Set Condition

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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.

6. “Reset coding”

Page 86

Coding level 1

“General” Group

Coding Coding in the factory set condition Possible change System design

00:1 System version 1:

One heating circuit without mixing valve A1 (heating circuit 1), without DHW heating

00:2 to 00:10

Vitotronic 300, GW6B Installation and Service

For system schemes, see the following table:

Value address 00: ...

2 One heating circuit without mixing valve A1 (heating circuit 1), with DHW heating;

3 One heating circuit with mixing valve M2 (heating circuit 2), without DHW heating. 4 One heating circuit with mixing valve (heating circuit 2), with DHW heating 5 One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve

6 One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve

7 Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3),

8 Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW

9 One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing

10 One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing

Coding in the factory set condition Possible change Servomotor runtime

40:...

“Boiler circuit pump”

53:1 With low loss header:

LON participant no.

77:1 LON participant number. 77:1

“Detached house/apartment building”

7f:1 Detached house 7F:0 Apartment building

Description

recognized automatically.

M2 (heating circuit 2), without DHW heating; recognized automatically.

M2 (heating circuit 2), with DHW heating; recognized automatically.

without DHW heating.

heating.

valve M2 (heating circuit 2) and M3 (heating circuit 3), without DHW heating; recognized automatically.

valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW heating; recognized automatically.

Actuator runtime at plug gSA1.

Boiler circuit pump only runs on demand if the burner is operational (with delay off time)

40:5 to 40:199

53:0 Boiler circuit pump runs permanently -

to 77:99

Adjustable from 5 to 199 sec.

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

Separate adjustment of holiday program and time program for DHW heating possible.

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Vitotronic 300, GW6B Installation and Service

Coding level 1

“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.

“Summer time starts: Month”

82:3 March 82:1

to 82:12

“Summer time starts: Week of the selected month”

83:2 Week 2 of the selected month 83:1

to 83:5

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

“Summer time starts: Day of the selected week”

84:7 Last Sunday of the selected month 84:1

to 84:7

“Wintertime starts: Month”

85:11 November 85:1

to 85:12

“Wintertime starts: Week of the selected month”

86:1 Week 1 of the selected month 86:1

to 86:5

“Wintertime starts: Day of the selected week”

87:7 Last Sunday of the selected month 87:1

to 87:7

“Operation enabled/blocked”

8f:0 Do not adjust! -- --

“Set supply temperature for external demand”

9b:70 Set to 158°F (70°C) 9b:0

to 9b:127

January to December

Week 1 to week 5 of the selected month

Special function

Monday to Sunday.

January to December

Week 1 to week 5 of the selected month

Monday to Sunday

Adjustable from 32 to 261°F (0 to 127°C) (limited by boiler specific coding)

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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

“Gas type”

03:0 Natural gas 03:1 LPG

“Altitude”

04:0 LA: ≤ 1500 m 04:1 HA: > 1500 m

“Max boiler temperature”

06:95 Set to 203°F (95°C) 06:5

to 06:127

“Integral threshold value of controller”

08:30 Set to 30 Kmin 08:1

to 08:255

“Runtime optimization”

09:1 Integral method 09:0 Minimum pause

Adjustable from 0 to 100% (0% represents burner minimum firing rate)

Adjustable from 41 to 261°F (5 to 127°C)

Adjustable from 1 to 255 Kmin

“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

“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. 21:1

“Interval for service”

23:0 No interval for service 23:1

”Service” display”

24:0 No “Service” display 24:1 “Service” is displayed (the address is

01:1 Single boiler system

01:3 Do not adjust!

07:2 to 07:8

to 21:100

to 23:24

Adjustable from 1 to 8

The number of hours run before the burner should be serviced is adjustable from 100 to 10000 h; 1 step

Adjustable from 1 to 24 months.

automatically set and must be manually reset after a service has been carried out).

100 h

5513 463 - 06

Page 89

Vitotronic 300, GW6B Installation and Service

Coding level 1

“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

“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 39:1

“Permanent last boiler”

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

“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) 3c:1 Conventional boiler strategy 1 (see page 75)

“Output statement”

3d:1 Output statement for condensing strategy

and conventional boiler strategy 1

36:1 to 36:127

37:20 to 37:127

38:1 Lead boiler changeover:

38:2 to 38:200

to 39:8

to 3a:8

3b:0 Standalone parallel boiler circuit:

3b:2 Standalone serial boiler circuit:

3b:3 Standalone serial boiler circuit:

3b:4 Sequential control method with supply

3c:2 Conventional boiler strategy 2 (see page 76)

3d:0 No output statement

1 to 8 boilers

Adjustable from 32 to 261°F (0 to 127°C) (only when operating with standard room temperature)

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.

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

Permanent lead boiler is boiler 1, 2, 3 or 8

Permanent last boiler is boiler 1, 2, 3 or 8

With supply temperature sensor (see page 73)

Without supply temperature sensor (see page 73)

With supply temperature sensor (see page 73)

temperature sensor (see page 73)

Note: Control only in accordance with conventional boiler strategy 2

100 hours run

5513 463 - 06

Page 90

Coding level 1

“Cascade” Group (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

“ECO threshold boiler 2”

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

to 42:+30

“ECO threshold boiler 3”

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

to 43:+30

“ECO threshold boiler 4”

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

to 44:+30

“Start integral threshold”

45:60 Set to 60 K x minute 45:1

to 45:255

“Stop integral threshold”

46:40 Set to 40 K x minute 46:1

to 46:255

“Stop differential”

47:15 Set to 15 K 47:2

to 47:30

“ECO threshold boiler 5”

65:31 No ECO threshold boiler 5 65:−30

to 65:+30

“ECO threshold boiler 6”

6F:31 No ECO threshold boiler 6 6F:−30

to 6F:+30

“ECO threshold boiler 7”

74:31 No ECO threshold boiler 7 74:−30

to 74:+30

“ECO threshold boiler 8”

7d:31 No ECO threshold boiler 8 7d:−30

to 7d:+30

Vitotronic 300, GW6B Installation and Service

Adjustable from -22 to 86°F (−30 to +30°C)

Adjustable from 1 to 255 K x minute Note: A boiler or burner stage will shut down if this value is exceeded.

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.

Adjustable from -22 to 86°F (−30 to +30°C)

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Page 91

Vitotronic 300, GW6B Installation and Service

Coding level 1

“DHW” Group

Coding in the factory set condition Possible change

“Storage tank heating, hysteresis”

55:0 Tank heating hysteresis ± 2.5 K 55:1 Adaptive storage tank heating enabled

(see page 82)

55:2 Storage tank temperature control with 2

temperature sensors (see page 82).

55:3 Storage tank temperature control, storage tank

loading system (see page 83)

“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 73:1

67:0 to 67:95

to 73:6 73:7 Permanently ON

Adjustable from 32 to 203°F (0 to 95°C) (limited by boiler-specific coding)

“ON” from once per hour for 5 min up to 6 times per hour for 5 min during the time program.

“Solar” Group

Note: The “Solar” group is only displayed if a solar control module, type SM1, is connected.

Coding in the factory set condition Possible change “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

“Maximum storage tank temperature”

08:60 DHW setpoint temperature (maximum tank

temperature) 140°F (60°C)

“Stagnation time reduction”

0a:5 Temperature differential for stagnation time

reduction (reduction in the speed of the solar circuit pump to protect system components and heat transfer medium) 5 K.

“Solar circuit flow rate”

0f:70 Solar circuit flow rate at maximum pump

speed 1.8 USG/min (7 L/min)

“Extended control function”

20:0 No extended control function enabled 20:1 Additional function for DHW heating

08:10 to 08:90

0a:0 Stagnation time reduction disabled

0a:1 to 0a:40

0f:1 to 0f:255

20:2 Differential temperature control 2 20:3 Differential temperature control 2 and auxiliary

20:4 Differential temperature control 2 for central

20:5 Thermostat function 20:6 Thermostat function and auxiliary function 20:7 Solar heating via external heat exchanger

20:8 Solar heating via external heat exchanger with

20:9 Solar heating of two DHW storage tanks

Adjustable from 50 to 194°F (10 to 90°C)

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

function

heating backup

without additional temperature sensor

additional temperature sensor

[Solar heating of two DHW tanks]

0.02 USG/min (0.1 L/min).

5513 463 - 06

Page 92

Coding level 1

“Heating Circuit ...” Group

Coding in the factory set condition Possible change “Storage tank priority”

a2:2 Tank priority control for heating circuit

pump and mixing valve

“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

a2:0 Without storage tank priority applicable

a2:1 Storage tank priority only applicable to

a2:3 to a2:15

a5:0 Without heating circuit pump logic

a5:1 to a5:15

Vitotronic 300, GW6B Installation and Service

to heating circuit pump and mixing valve

mixing valve Modulating priority applies to mixing

valves, i.e. the heating circuit receives a reduced amount of heat.

function With heating circuit pump logic function:

Heating circuit pump OFF, see the following table

Coding address a5:...

With heating circuit pump logic function: 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 Possible change “Extended economy mode”

a6:36 Extended economy mode disabled a6:5

to a6:35

“Mixing valve economy function”

a7:0 Only for heating circuits with mixing

a7:1 With mixing valve economy function: valve: Without mixing valve economy function

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.

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

H If there is a risk of frost

5513 463 - 06

Page 93

Vitotronic 300, GW6B Installation and Service

Coding level 1

“Heating Circuit ...” Group (continued)

Coding in the factory set condition Possible change “Pump idle time”

a9:0 Without pump idle time a9:7 With pump idle time (heating circuit

pump OFF) Function description page 78 Note: The maximum idle time is 10 h.

a9:1 to a9:15

“Room temperature hook-up”

b0:0 With remote control:*1

Heating mode/reduced mode: Weather-compensated

“Room temperature-dependent heating circuit pump logic function”

b5:0 With remote control:*1

No room temperature-dependent heating circuit pump logic function

b0:1 Heating mode: Weather-compensated

b0:2 Heating mode: with room

b0:3 Heating mode/reduced mode:

b5:1 to b5:8

Pump idle time adjustable from 1 to 15. 1: Short idle time 15: Long idle time

Reduced mode: with room temperature hook-up

temperature hook-up Reduced mode: Weather-compensated

with room temperature hook-up

For heating circuit pump logic function, see the following table:

Coding address a5:...

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

Coding in the factory set condition Possible change “Minimum supply temperature limit”

c5:20 Electronic supply temperature minimum

“Maximum supply temperature limit”

c6:75 Electronic maximum supply temperature

*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.

With heating circuit pump logic function: Heating circ pump OFF

limit 68°F (20°C) (only for operation with standard room temperature)

limit set to 167°F (75°C)

c5:1 to c5:127

c6:10 to c6:127

Adjustable from 34 to 261°F (1 to 127°C) (limited by boiler specific coding)

Adjustable from 50 to 261°F (10 to 127°C) (limited by boiler specific coding)

5513 463 - 06

Page 94

Coding level 1

Vitotronic 300, GW6B Installation and Service

“Heating Circuit ...” Group (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)

“EA1 extension: Operating program changeover”

d8:0 No operating program changeover d8:1 Operating program changeover via input DE1

“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”.

d5:1 Changeover to “Constant operation with

standard room temperature”

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

f8:+10 to f8:–60

f8:–61 Function disabled

Time limit adjustable from 1 to 12 h*2.

Adjustable from 50 to -76°F (+10 to –60°C)

“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.

“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

temperature when changing from operation with reduced room 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

temperature (see coding “fa”) 60 min. See example on page 80.

*2 In the “Heating and DHW” operating program, comfort mode ends automatically when the system changes over to operation with standard room temperature.

f9:+10 to f9:–60

fa:0 to fa:50

fb:0 to fb:300

Adjustable from 50 to -76°F (+10 to –60°C)

Adjustable from 0 to 50%

Adjustable from 0 to 300 min

5513 463 - 06

Page 95

Vitotronic 300, GW6B Installation and Service

“General” Group

Coding in the factory set condition Possible change System design

00:1 System version 1:

One heating circuit without mixing valve A1 (heating circuit 1), without DHW heating

00:2 to 00:10

Coding level 2

For system schemes, see the following table:

Value address 00: ...

2 One heating circuit without mixing valve A1 (heating circuit 1), with DHW heating;

3 One heating circuit with mixing valve M2 (heating circuit 2), without DHW heating. 4 One heating circuit with mixing valve (heating circuit 2), with DHW heating. 5 One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve

6 One heating circuit without mixing valve A1 (heating circuit 1), one heating circuit with mixing valve

7 Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3),

8 Two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW

9 One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing

10 One heating circuit without mixing valve A1 (heating circuit 1), two heating circuits with mixing

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

“With EA1 extension: Temperature demand”

1e:0 Analogue input 0-10 V:

“Reset time hydraulic switch/buffer

20:... Controller integral time for low loss

“Controller delay hydraulic switch/buffer

22:... Controller delay low loss header in

Description

recognized automatically.

M2 (heating circuit 2), without DHW heating; recognized automatically.

M2 (heating circuit 2), with DHW heating; recognized automatically.

without DHW heating.

heating.

valve M2 (heating circuit 2) and M3 (heating circuit 3), without DHW heating; recognized automatically.

valve M2 (heating circuit 2) and M3 (heating circuit 3), with DHW heating; recognized automatically.

brief operation: 5 min

Temperature demand from 32 to 212°F (0 to 100°C): 1 V

50°F (10°C)

10 V 212°F (100°C)

header in sec, factory set condition defaulted by the boiler coding card. The greater the integral action time, the more accurate but slower the controller.

minutes, time between burner start and controller start.

12:1 to 12:60

1E:1 Adjustable from 86 to 248°F

20:1 to 20:199

Adjustable from 1 to 60 min

(30 to 120°C):

86°F (30°C)

1 V 10 V 248°F (120°C)

Adjustable from 10 to 1990 sec, 1 step

Adjustable from 1 to 199 min

10 sec

2f:0 Do not adjust! -- --

“AM1 extension”

32:0 Without AM1 extension 32:1 With AM1 extension

“Function output A2 at AM1 extension”

33:1 Heating circuit pump, heating circuit

without mixing valve A1 (heating circuit 1)

5513 463 - 06

33:0 DHW recirculation pump 33:2 DHW loading pump

Page 96

Coding level 2

Vitotronic 300, GW6B Installation and Service

General” Group (continued)

Coding in the factory set condition Possible change “Function output A1 at AM1 extension”

34:1 Heating circuit pump, heating circuit

without mixing valve A1 (heating circuit 1)

“Servomotor runtime”

40:125

“Sensor 17A”

4a:0 Do not adjust! -- --

“Sensor 17B”

4b:0

“Connection at plug 20A1”

4c:0

“Connection at plug 29”

4d:1

“Connection at plug 52A1”

4e:1 Motor for 3-way mixing valve for return

“Delay off time, shunt or distribution pump”

4f:5 Delay off time distribution pump 5 min 4f:0 No pump delay off

“Supply temperature sensor for low loss header”

52:0 Without supply temperature sensor 52:1 With supply temperature sensor;

“Boiler circuit pump”

53:1 With low loss header:

“Solar thermal system”

54:0 Without solar thermal system 54:1 With Vitosolic 100; automatic recognition.

“EA1 extension”

5b:0 Without EA1 extension 5b:1 With EA1 extension; automatic recognition.

Servomotor runtime at plug gSA1 125 sec

No sensor aJB installed

Connection on plug sÖA1: Heating circuit pump

Connection at plug sL: Shunt pump

temperature control

Boiler pump only runs on demand if the burner is operational (with delay off time)

34:0 DHW recirculation pump 34:2 DHW pump

40:5 to 40:199

4b:1

4c:1 Primary pump, primary store system

4d:0 Distribution pump 4d:2 Boiler pump 4d:3 Boiler pump with isolation valve function

4e:0 Motorized isolation valve

4e:2 Motor for 3-way mixing valve, primary store

4e:3 Mixing valve motor for heating circuit without

4f:1 to 4f:60

53:0 Boiler pump runs permanently - subject to

54:2 Vitosolic 200; automatic recognition. 54:3 With solar control module SM1, without

54:4 With solar control module, type SM1, with

Adjustable from 5 to 199 sec.

Sensor aJB installed (e.g. temperature sensor T2); automatic recognition.

Note: Factory set condition for lag boilers

system

mixing valve A1 (heating circuit 1)

Adjustable from 1 to 60 min

automatic recognition.

warm weather shutdown.

auxiliary function; automatic recognition.

auxiliary function, e.g. central heating backup; automatic recognition.

5513 463 - 06

Page 97

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 input DE1 at EA1 extension”

5d:0 No function 5d:1 Operating program changeover

“Function input DE2 at EA1 extension”

5e:0 5e:1 Operating program changeover

“Function input DE3 at EA1 extension”

5f:0 No function 5f:1 Operating program changeover

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: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: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: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.

Coding level 2

5513 463 - 06

Page 98

Coding level 2

Vitotronic 300, GW6B Installation and Service

General” Group (continued)

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

neutralizing system: None

Delay off time for circulation pump, neutralising system at output 2 at extension AM1”

6d:0 Delay off time circulation pump

neutralizing system: None

“Display correction for outdoor temperature”

6e:50 No display correction for outdoor

temperature

“LON communication module”

76:1 With 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 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

“LON communication module: Time”

7b:1 Control unit transmits the time. 7b:0 No time transmission

“Detached house/apartment building”

7f:1 Detached house 7F:0 Apartment building

“Fault message”

80:6 A fault message is issued if a fault

occurs for at least 30 sec.

6c:1 to 6c:255

6d:1 to 6d:255

6e:0 to 6e:49

6e:51 to 6e:99

76:0 Without LON communication module

to 77:99

7a:2 Heating circuit with mixing valve M2

7a:3 Heating circuit with mixing valve M3

80:0 Immediate fault message. 80:2

to 80:199

Adjustable from 1 to 255 sec

Display correction –5 K to Display correction –0.1 K

Display correction +0.1 K to Display correction +4.9 K

LON participant number, adjustable from 1 to 99: 1 - 8 = Boiler and heating circuit control unit 9 = Cascade control unit 10 - 97 = Vitotronic 200-H 98 = Vitogate 99 = Vitocom

mixing valve A1 (heating circuit 1)

(heating circuit 2)

(heating circuit 3)

Separate adjustment of holiday program and time program for DHW heating possible.

Adjustable from 10 to 995 sec, 1 step

5 sec.

5513 463 - 06

Page 99

Vitotronic 300, GW6B Installation and Service

Coding level 2

“General” Group (continued)

Coding in the factory set condition Possible change “Automatic summer/wintertime changeover”

81:1 Automatic summer/wintertime

changeover

“Summer time starts: Month”

82:3 March 82:1

“Summer time starts: Week of the selected month”

83:2 Week 2 of the selected month 83:1

“Summer time starts: Day of the selected week”

84:7 Last Sunday of the selected month 84:1

“Wintertime starts: Month”

85:11 November 85:1

“Wintertime starts: Week of the selected month”

86:1 Week 1 of the selected month 86:1

“Wintertime starts: Day of the selected week”

87:7 Last Sunday of the selected month 87:1

“Temperature displayed”

88:0 Temperature unit °C (Celsius) 88:1 Temperature unit °F (Fahrenheit)

“Test display conditions”

8a:175 Do not adjust! -- --

“Identification KM bus combustion controller”

8b:1 ID exists 8b:0 ID does not exist

“Operation enabled/blocked”

8f:0 Do not adjust! -- --

“Time constant for calculating adjusted outdoor temperature”

90:128 Time constant 21.3 h 90:1

81:0 Manual summer/wintertime changeover 81:2 Do not adjust! 81:3 With LON communication module:

The control unit receives the time.

January to December to 82:12

Week 1 to week 5 of the to 83:5

83:6 Last week – 1 week 83:7 Last week – 2 week 83:8 Last week – 3 week 83:9 Last week – 4 week 83:10

to 83:14

to 84:7

to 85:12

to 86:5

to 87:7

to 90:199

selected month.

Special function

Monday to Sunday

January to December

Week 1 to week 5 of the selected month

Monday to Sunday

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

5513 463 - 06

Page 100

Coding level 2

Vitotronic 300, GW6B Installation and Service

General” Group (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)

“Central fault message during emissions test function/service display”

93:0 Does not affect central fault 93:1 Affects central fault message

“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.

“Viessmann system number”

98:1 Viessmann system number in

conjunction with monitoring of several systems within one LON system with Vitocom 300

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)

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

100

5513 463 - 06

Viessmann Vitotronic 300 GW6B, Vitotronic 300, GW6B Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual