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

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

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

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

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

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.

5513 463 - 06

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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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

5513 463 - 06

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

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.

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

5513 463 - 06

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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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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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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+ 98 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual