Viessmann VITODENS 300 WB3A Istruzioni operative

VIESMANN

Installation instructions

for heating engineers

Vitodens 300

Type WB3A,49and66kW

Gas fired wall mounted condensing boiler

natural gas and LPG version

VITODENS 300

5862 570 GB 5/2004 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

(heating engineer/installation contrac-

tor).

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.

Please observe all commissioning

work specified for gas systems.

Safety instructions

5862 570 GB

Preparing for installation

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

Preparations for boiler installation............................................................... 4

Installation

Installing the boiler and making all connections ........................................... 6

&Wall mounting bracket installation ............................................................ 6

&Hanging the boiler into the wall mounting bracket ..................................... 7

Heating water (primary) connection............................................................. 8

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 570 GB

Vitodens 300, Type WB3A

Set up for operation with natural gas E or LPG P.

The natural gas E version can be converted to natural gas LL using a conver-

sion kit.

TheLPGPversioncanbeconvertedtonaturalgasEorLLusingaconversion

kit.

Preparations for boiler installation

AHeating flow G1½" BSafety valve

Product information

5862 570 GB

CDHW cylinder flow G1½"

DGas connection

EDHW cylinder return G1½"

FHeating return G1½"

GExpansion vessel

HCable arrangement area

KRecommended dimension

LCondensate drain

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.

&All cables in area Hshould pro-

trude1200mmfromthewall.

Preparations for boiler installation (cont.)

5862 570 GB

Wall mounting bracket installation

Note

The enclosed screws and rawl plugs are only suitable for concrete. For other

construction materials, use fixings which are suitable for 110 kg loads.

AReference point: boiler top edge

BBoiler installation template

(included with the boiler)

CTopedgefinishedfloor

DRecommendation

Installing the boiler and making all connections

5862 570 GB

Hanging the boiler into the wall mounting bracket

Installing the boiler and making all connections (cont.)

5862 570 GB

AHeating flow

BDHW flow

CGas connection

DDHW return

EHeating return

FExpansion vessel

Connect the boiler to the on-site pipe-

work.

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.

Heating water (primary) connection

5862 570 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

leadstodamagetotheboi-

ler 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 570 GB

Opening the control unit housing

5862 570 GB

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