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
2
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
3
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
4
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
2
,
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.)
5
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
6
5862 570 GB
Hanging the boiler into the wall mounting bracket
Installing the boiler and making all connections (cont.)
7
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
8
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
9
5862 570 GB
Opening the control unit housing
10
5862 570 GB
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