Viessmann Vitodens 300 Manuale utente

Installation instructions VIESMANN

for heating engineers

Vitodens 300

Type WB3A, 6.6 to 35.0 kW

Gas fired wall mounted condensing boiler

Natural gas and LPG version

VITODENS 300

5862 512 GB 2/2004 Dispose after installation

Please follow these safety instructions closely to prevent accidents and

material losses.

Safety instructions explained

!Important information

This symbol warns against the

risk of material losses and

environmental pollution.

Note

Details identified by the words "Note"

contain additional information.

Safety regulations

Installation, initial start-up, inspection,

maintenance and repairs must be car-

ried out by a competent person (heat-

ing engineer/installation contractor).

Observe all current safety regulations

as defined by DIN, EN, DVGW, TRGI,

TRF, VDE or all locally applicable

standards.

See also the "safety instructions" in

the "Vitotec Technical Guide" folder.

Before working on the equipment/

heating system, isolate the mains

electrical supply (e.g. by removing a

separate mains fuse or by means of a

mains electrical isolator) and safe-

guard against unauthorised reconnec-

tion.

Close the main gas shut-off valve and

safeguard against unauthorised

reopening.

Electrical assemblies provided on site

must be type-approved.

Work on gas equipment

This must only be carried out by an

approved gas fitter.

Observe all commissioning work spe-

cified for gas installations to TRGI or

TRF and all local regulations.

Safety instructions

5862 512 GB

Preparing for installation

Product information .................................................................................... 4

Preparations for boiler installation ............................................................... 5

Installation

Installing the boiler and making all connections ........................................... 7

Flue gas connection.................................................................................... 8

Condensate connection .............................................................................. 8

Gas connection .......................................................................................... 9

Opening the control unit housing................................................................. 10

Electrical connections................................................................................. 11

&Routing connecting cables ....................................................................... 13

Closing control unit housing and inserting user interface ............................. 14

Front panel installation................................................................................ 15

Commissioning and adjustments................................................................. 15

Index

5862 512 GB

Vitodens 300, Type WB3A

Set up for operation with natural gas E.

The natural gas E version can be converted to natural gas LL or LPG P using a

conversion kit.

Product information

5862 512 GB

For on-site preparation of gas, water and electrical connections, see

installation instructions, installation template or mounting frame.

AHeating flow Rp¾"

BDHW Rp½" (gas fired combination

boiler)

DHW flow G¾" (gas fired boiler)

CGas connection

DCold water Rp½" (gas fired combi-

nation boiler)

DHW return G¾" (gas fired boiler)

EHeating return Rp¾"

FFill & drain valve

GCable arrangement area

HDimension for installation with

DHW cylinder below the boiler.

KExpansion vessel connection G¾"

LCondensate drain

Preparations for boiler installation

5862 512 GB

1. Prepare the water connections.

Thoroughly flush the heating sys-

tem.

2. Prepare the gas connection

accordingtoTRGIorTRForall

local regulations.

3. Prepare the electrical connections.

&Mainscable:NYM-J3x1.5mm

fuse max. 16 A, 230 V~, 50 Hz.

&Accessory cables: NYM with the

required number of conductors

for the external connections.

&Allcablesinarea"G" should

protrude 1200 mm from the wall.

Preparations for boiler installation (cont.)

5862 512 GB

Note

The expansion vessel connector is packed separately.

AHeating flow

Installing the boiler and making all connections

5862 512 GB

BDHW (gas fired combination boi-

ler)

DHW flow (gas fired boiler)

CGas connection

DCold water (gas fired combination

boiler)

DHW return (gas fired boiler)

EHeating return

FFill & drain valve

Flue gas connection

Connect the balanced flue pipe. Flue gas system installation

instructions.

Condensate connection

Connect the condensate drain with a

pipe air vent valve sloping to the pub-

lic sewer.

Installing the boiler and making all connections (cont.)

5862 512 GB

AGas connection

Conversion to other gas

types:

Conversion kit installation

instructions

Information regarding operation

with LPG

We recommend the installation of an

external safety solenoid valve when

installing the boiler in rooms below

ground level.

1. Carry out a leak test.

!Important information

Excessive test pressure

leadstodamageonboiler

and gas train.

Max. test pressure

150 mbar. If a higher pres-

sure is required for leak

tests, separate the boiler

and the gas train from the

mains gas supply (undo fit-

tings).

2. Purge the gas supply pipe.

Gas connection

5862 512 GB

Opening the control unit housing

5862 512 GB

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