Viessmann Vitoladens 300-C Manual de usuario
VIESMANN
Installation instructions
for contractors
Vitoladens 300-C
Type VC3,12.9to28.9kW
Oil fired condensing boiler
VITOLADENS 300-C
5592 913 GB 11/2007 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
5592 913 GB
Preparing the installation
Clearance dimensions ................................................................................ 4
Overview of connections............................................................................. 5
Preparing the boiler installation................................................................... 6
Installation sequence
Removing front panel.................................................................................. 7
Boiler positioning and levelling.................................................................... 8
&Positioning on an on-site plinth ................................................................ 8
&Positioning on a plinth.............................................................................. 8
&DHW cylinder positioning ......................................................................... 8
Fitting the safety equipment block and connections on the heating water
side ............................................................................................................ 9
Making the safety connections .................................................................... 12
&Low water indicator.................................................................................. 12
Condensate connection .............................................................................. 12
&Connection with siphon............................................................................ 12
&Connection with neutralising system (accessory)..................................... 13
Flue gas connection.................................................................................... 14
&Open flue operation ................................................................................. 15
&Balanced flue operation ........................................................................... 15
Installing the oil supply as a single line system ............................................ 17
Removing the top panel and opening the control unit casing ........................ 19
Routing the connecting cables .................................................................... 20
&Inserting cables and applying strain relief................................................. 21
Summary of electrical connections.............................................................. 22
Additional set value at plug aVF .................................................................. 25
External connections at plug aVD................................................................ 25
&External heating program changeover/external demand ........................... 26
&External blocking ..................................................................................... 26
Pump connection........................................................................................ 27
Connecting a central fault message to plug gÖ ............................................ 27
Closing the control unit casing .................................................................... 28
Connecting the fire protectionswitch(onlyfora) ...................................... 29
Fitting the front and top panel and connecting the user interface.................. 30
Commissioning and adjustment .................................................................. 30
Index
3
5592 913 GB
ACombustion chamber BBoiler
CDHW cylinder
Note
The siphon (if required) can be fitted
either in the l.h. or the r.h. side of the
floor panel. Ensure the siphon
remains accessible.
Clearance dimensions
4
5592 913 GB
AAir vent valve
BCable entry
CCable entry
DVentilation air connector
EFlue gas connection
FConnection for the diaphragm
expansion vessel (tee Rp ½")
GBoiler fill valve
HHeating return
&Flat-packing connection: G 1½"
&Connection with the threaded
inserts supplied: Rp 1"
KHeating flow
&Flat-packing connection: G 1½"
&Connection with the threaded
inserts supplied: Rp 1"
LCylinder flow and heating flow
G1½"
MCylinder return and heating return
G1½"
NCondensate drain
OCondensate inlet at the plinth*1
(accessories)
PCondensate drain at the plinth*1
(accessory)
ROil line connection
Overview of connections
5
5592 913 GB
*1 If neutralising system Tis being installed.
SDrain valve
TNeutralising system (accessories)
Preparing the boiler installation
1. Prepare the water connections.
Flush the heating system thor-
oughly.
2. Prepare the oil connections (oil fil-
ter).
&Single line filter (magnum filter
bowl with large filter insert, filter
mesh max. 40 µm) with automatic
fuel oil air vent valve (see
page 17).
&Fit the filter as near as possible
to the lower edge of the l.h. side
panel to leave the flexible oil
lines long enough to enable the
burner removal.
3. Prepare the electrical connections.
&Power cable (sheathed cable):
NYM-J3x1.5mm
2
,fuse
max.16A,230V/50Hz
&Accessory cables: NYM with the
required number of conductors
for the external connections
Overview of connections (cont.)
6
5592 913 GB
Note
Remove the siphon from the front
panel.
Removing front panel
7
5592 913 GB
Positioning on an on-site plinth
Orientate the boiler with a slight
incline towards the back.
Positioning on a plinth
Installation instructions on the plinth packaging.
Thismaybehousedintheplinthifa
neutralising system is connected.
Install the neutralising system when
fitting a plinth.
DHW cylinder positioning
Installation instructions, system connection.
Boiler positioning and levelling
8
5592 913 GB
Note
Counterhold the safety equipment block when tightening the fixing screws.
APressure gauge
BAir vent valve
CAutomatic shut-off valve
DQuick-acting air vent valve
ESafety valve
FTeeRp½"(iftheexpansionves-
selistobefittedhere)
GBoiler fill valve
Fitting the safety equipment block and connections on the heating water side
9
5592 913 GB
AHeating circuit connections with
threaded fittings or Modular-Divi-
con heating circuit distributor
(accessories)
BHeating flow
CHeating return
Fitting the safety equipment block and connections . . . (cont.)
10
5592 913 GB
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5
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