Viessmann Vitodens 300 Manuale utente
VIESMANN
Installation instructions
for heating engineers
Vitodens 300
Type WB3B, 4.2 to 35.0 kW
Wall mounted gas fired condensing boiler
Natural gas and LPG version
VITODENS 300
5862 872 GB 12/2005 Dispose after installation.
Please follow these safety instructions closely to prevent accidents and
material losses.
Safety instructions explained
Danger
This symbol warns against the
risk of injury.
!Please note
This symbol warns against the
risk of material losses and
environmental pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These instructions are exclusively
designed for qualified personnel.
&Work on gas appliances must only
be carried out by a qualified gas fit-
ter.
&Work on electrical equipment must
only be carried out by a qualified
electrician.
Regulations
Observe the following when working
on this system
&all legal instructions regarding the
prevention of accidents,
&all legal instructions regarding
environmental protection,
&theCodeofPracticeofrelevant
trade associations,
&all current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards.
Workingonthesystem
&Isolate the system from the power
supply and check that it is no longer
'live', e.g. by removing a separate
fuse or by means of a mains isola-
tor.
&Safeguard the system against
unauthorised reconnection.
&When using gas as fuel, also close
the main gas shut‐off valve and
safeguard against unauthorised
reopening.
Safety instructions
2
5862 872 GB
Preparing the installation
Product information .................................................................................... 4
Preparing the installation ............................................................................ 5
&Preparing the boiler installation ................................................................ 5
Installation steps
Installing the boiler and making all connections ........................................... 7
Flue gas connection.................................................................................... 8
Condensate connection .............................................................................. 8
Gas connection .......................................................................................... 8
Opening the control unit housing................................................................. 10
Electrical connections................................................................................. 11
&Allocation of connections to plug 28 ......................................................... 14
&Routing connecting cables ....................................................................... 15
Closing the control unit casing and inserting the programming unit .............. 16
Front panel installation................................................................................ 17
Commissioning and adjustment .................................................................. 17
Index
3
5862 872 GB
Vitodens 300, WB3B
Rated output 13 and 19 kW:
Set up for operation with natural gas E and LL.
ForconversiontoLPGP(withoutconversionkit),seetheserviceinstructions.
Rated output 26 and 35 kW:
Set up for operation with natural gas E.
ForconversiontonaturalgasLLandLPGP(withconversionkit),seetheser-
vice instructions.
Conversion for other target countries
The Vitodens 300 should generally only be delivered to those countries speci-
fied on the type plate. For deliveries to alternative countries, an approved con-
tractor must arrange, on his own initiative, for an individual approval in
accordance with the law of the land.
Product information
4
5862 872 GB
Preparing the boiler installation
For on‐site preparation of gas, water and electrical connections, see
installation instructions, installation template or mounting frame.
AHeating flow Rp¾"
BDHW cylinder flow G¾"
CGas connection
DDHW cylinder return G¾"
EHeating return Rp¾"
FFill & drain valve
GCable entry
HDimension with DHW cylinder
below
KCondensate drain
Preparing the installation
5
5862 872 GB
Rated output range kW 4.2 ‐13 4.8 ‐19 6.6 ‐26 8.7 ‐35
a mm 450 450 480 480
b mm 360 360 380 380
Note
This boiler (protection level: IP X4 D)
is approved for installation in wet
rooms inside protection area 1
according to DIN VDE 0100, providing
the occurrence of hosed water can be
excluded.
Observe the requirements of DIN VDE
0100.
1. Prepare the water connections.
Flush the heating system thor-
oughly.
2. Prepare the gas connection
accordingtoTRGIorTRForall
local regulations.
3. Prepare the electrical connections.
&Power supply cable: 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.
&Allow all cables in area Gto pro-
trude1200mmfromthewall.
Preparing the installation (cont.)
6
5862 872 GB
Note
Quick‐acting air vent valve and connector for the expansion vessel (only for 26
and35kW)arepackedseparately.
AHeating flow
BDHW flow
CGas connection
DDHW return
EHeating return
FFill & drain valve
Installing the boiler and making all connections
7
5862 872 GB
Connect the balanced flue pipe. Flue gas system installation
instructions.
Condensate connection
Connect the condensate drain with a
slopeandapipeventtothepublic
sewer.
Gas connection
AGas connection
Notes regarding the operation with
LPG
We recommend the installation of an
external safety solenoid valve when
installing the boiler in rooms below
ground level.
Flue gas connection
8
5862 872 GB
1. Carry out a gas soundness test.
!Please note
Excessive test pressure
may damage the boiler and
the gas valve.
Max. test pressure 150
mbar. Where higher pres-
sure is required for leak
tests, separate the boiler
and the gas valves from the
mains gas supply pipe (undo
the fitting).
2. Vent the gas supply pipe.
Conversion to other gas
types:
Service instructions
Gas connection (cont.)
9
5862 872 GB
Opening the control unit housing
10
5862 872 GB
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7
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