Viessmann VITODENS 050-W Guide rapide
Installation and service
instructions
for contractors
VIESMANN
Vitodens 050-W
Type BPJD, 6.5 to 35.0 kW
Wall mounted gas condensing boiler
For natural gas and LPG
Gas Council Number: 47 819 38, 47 819 39
VITODENS 050-W
5675991 GB 8/2020 Please keep safe.
2
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 pollu-
tion.
Note
Details identified by the
word "Note" contain addi-
tional information.
Target group
These instructions are
exclusively intended for
qualified contractors.
■Work on gas installations
may only be carried out
by a registered gas fitter.
■Work on electrical equip-
ment may only be car-
ried out by a qualified
electrician.
■The system must be
commissioned by the
system installer or a
qualified person author-
ised by the installer.
Safety instructions
Safety instructions
5675991
3
Regulations to be observed
■National installation reg-
ulations
■Statutory regulations for
the prevention of acci-
dents
■Statutory regulations for
environmental protection
■Codes of practice of the
relevant trade associa-
tions
■Relevant country-spe-
cific safety regulations
Safety instructions for working on the system
Working on the system
■Where gas is used as
the fuel, close the main
gas shut-off valve and
safeguard it against
unintentional reopening.
■Isolate the system from
the power supply, e.g. by
removing the separate
fuse or by means of a
mains isolator, and
check that it is no longer
live.
■Safeguard the system
against reconnection.
■Wear suitable personal
protective equipment
when carrying out any
work.
Safety instructions
Safety instructions (cont.)
5675991
4
Danger
Hot surfaces and flu-
ids can lead to burns
or scalding.
■Before maintenance
and service work,
switch OFF the
appliance and let it
cool down.
■Never touch hot
surfaces on the
boiler, burner, flue
system or pipework.
!Please note
Electronic assem-
blies can be dam-
aged by electrostatic
discharge.
Prior to commencing
work, touch earthed
objects such as heat-
ing or water pipes to
discharge static
loads.
Repair work
!Please note
Repairing compo-
nents that fulfil a
safety function can
compromise the safe
operation of the sys-
tem.
Replace faulty com-
ponents only with
genuine Viessmann
spare parts.
Safety instructions
Safety instructions (cont.)
5675991
5
Auxiliary components,
spare and wearing parts
!Please note
Spare and wearing
parts that have not
been tested together
with the system can
compromise its func-
tion. Installing non-
authorised compo-
nents and making
non-approved modifi-
cations or conver-
sions can compro-
mise safety and may
invalidate our war-
ranty.
For replacements,
use only original
spare parts supplied
or approved by
Viessmann.
Safety instructions
Safety instructions (cont.)
5675991
6
Safety instructions for operating the system
If you smell gas
Danger
Escaping gas can
lead to explosions
which may result in
serious injury.
■Do not smoke. Pre-
vent naked flames
and sparks. Never
switch lights or elec-
trical appliances on
or off.
■Close the gas shut-
off valve.
■Open windows and
doors.
■Evacuate any peo-
ple from the danger
zone.
■Notify your gas or
electricity supply
utility from outside
the building.
■Have the power
supply to the build-
ing shut off from a
safe place (outside
the building).
If you smell flue gas
Danger
Flue gas can lead to
life threatening poi-
soning.
■Shut down the heat-
ing system.
■Ventilate the instal-
lation site.
■Close doors to living
spaces to prevent
flue gases from
spreading.
What to do if water
escapes from the appli-
ance
Danger
If water escapes from
the appliance there is
a risk of electrocu-
tion.
Switch OFF the heat-
ing system at the
external isolator (e.g.
fuse box, domestic
distribution board).
Safety instructions
Safety instructions (cont.)
5675991
7
Danger
If water escapes from
the appliance there is
a risk of scalding.
Never touch hot heat-
ing water.
Condensate
Danger
Contact with conden-
sate can be harmful
to health.
Never let condensate
touch your skin or
eyes and do not
swallow it.
Flue systems and com-
bustion air
Ensure that flue systems
are clear and cannot be
sealed, for instance due to
accumulation of conden-
sate or other external cau-
ses.
Ensure an adequate sup-
ply of combustion air.
Inform system users that
subsequent modifications
to the building characteris-
tics are not permissible
(e.g. cable/pipework rout-
ing, cladding or partitions).
Danger
Leaking or blocked
flue systems, or an
inadequate supply of
combustion air can
cause life threatening
poisoning from car-
bon monoxide in the
flue gas.
Ensure the flue sys-
tem is in good work-
ing order. Vents for
supplying combustion
air must be non-seal-
able.
Safety instructions
Safety instructions (cont.)
5675991
8
Extractors
Operating appliances that
exhaust air to the outside
(extractor hoods, extrac-
tors, air conditioning units,
etc.) can create negative
pressure. If the boiler is
operated at the same
time, this can lead to a
reverse flow of flue gas.
Danger
The simultaneous
operation of the
boiler and appliances
that exhausts air to
the outside can result
in life threatening poi-
soning due to a
reverse flow of flue
gas.
Fit an interlock circuit
or take suitable steps
to ensure an ade-
quate supply of com-
bustion air.
Safety instructions
Safety instructions (cont.)
5675991
9
Installation instructions
Information
Disposal of packaging.......................................................................................... 11
Symbols................................................................................................................ 12
Intended use......................................................................................................... 13
Product information.............................................................................................. 13
Spare parts lists.................................................................................................... 14
Preparing for installation................................................................................... 15
Installation sequence
Mounting the boiler and making connections....................................................... 20
Opening the programming unit............................................................................. 25
Electrical connections........................................................................................... 26
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 30
Further details regarding the individual steps....................................................... 31
Troubleshooting
Function sequence and possible faults................................................................ 55
Fault display......................................................................................................... 56
Repairs................................................................................................................. 61
Changing the gas type
Converting from LPG to natural gas..................................................................... 73
Control unit
Functions and operating conditions in weather-compensated mode................... 75
Designs
Connection and wiring diagrams.......................................................................... 77
Specification....................................................................................................... 82
Disposal
Final decommissioning and disposal.................................................................... 83
Certificates
Declaration of conformity...................................................................................... 84
Index
Index
5675991
10
Keyword index.................................................................................................... 85
Index
Index (cont.)
5675991
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