Viessmann VITODENS 050-W Quick guide

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 31, 47 819 32
VITODENS 050-W
5675991 GB/en 11/2017 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 envi-
ronmental pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These instructions are exclusively
intended for qualified contractors.
■ Work on gas installations may only
be carried out by a registered gas fit-
ter.
■ Work on electrical equipment may
only be carried out by a qualified
electrician.
■ The system must be commissioned
by the system installer or a qualified
person authorised by the installer.
Regulations to be observed
■ National installation regulations
■ Statutory regulations for the preven-
tion of accidents
■ Statutory regulations for environmen-
tal protection
■ Codes of practice of the relevant
trade associations
■ All current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards
aÖNORM, EN,
ÖVGW G K directives,
ÖVGW-TRF and ÖVE
cSEV, SUVA, SVGW, SVTI,
SWKI, VKF and EKAS guideline
1942: LPG, part 2
Safety instructions
Safety instructions
5675991

3
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 safe-
guard it against unintentional reopen-
ing.
■ 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 recon-
nection.
■ Wear suitable personal protective
equipment when carrying out any
work.
Danger
Hot surfaces can cause burns.
■ Before maintenance and serv-
ice 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 assemblies can be
damaged by electrostatic dis-
charge.
Prior to commencing work,
touch earthed objects such as
heating or water pipes to dis-
charge static loads.
Repair work
!Please note
Repairing components that fulfil
a safety function can compro-
mise the safe operation of the
system.
Replace faulty components only
with genuine Viessmann spare
parts.
Auxiliary components, spare and
wearing parts
!Please note
Spare and wearing parts that
have not been tested together
with the system can compro-
mise its function. Installing non-
authorised components and
making non-approved modifica-
tions or conversions can com-
promise safety and may invalid-
ate our warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5675991

4
Safety instructions for operating the system
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in seri-
ous injury.
■ Do not smoke. Prevent naked
flames and sparks. Never
switch lights or electrical appli-
ances on or off.
■ Close the gas shut-off valve.
■ Open windows and doors.
■ Evacuate any people from the
danger zone.
■ Notify your gas or electricity
supply utility from outside the
building.
■ Have the power supply to the
building shut off from a safe
place (outside the building).
If you smell flue gas
Danger
Flue gas can lead to life threat-
ening poisoning.
■ Shut down the heating sys-
tem.
■ Ventilate the installation site.
■ Close doors to living spaces
to prevent flue gases from
spreading.
What to do if water escapes from the
appliance
Danger
If water escapes from the appli-
ance there is a risk of electrocu-
tion.
Switch OFF the heating system
at the external isolator (e.g. fuse
box, domestic distribution
board).
Danger
If water escapes from the appli-
ance there is a risk of scalding.
Never touch hot heating water.
Condensate
Danger
Contact with condensate can be
harmful to health.
Never let condensate touch your
skin or eyes and do not swallow
it.
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
external causes.
Avoid continuous condensate disposal
with a wind protector.
Ensure an adequate supply of combus-
tion air.
Inform system users that subsequent
modifications to the building character-
istics are not permissible (e.g. cable/
pipework routing, cladding or parti-
tions).
Safety instructions
Safety instructions (cont.)
5675991

5
Danger
Leaking or blocked flue sys-
tems, or an inadequate supply
of combustion air can cause life
threatening poisoning from car-
bon monoxide in the flue gas.
Ensure the flue system is in
good working order. Vents for
supplying combustion air must
be non-sealable.
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 poison-
ing due to a reverse flow of flue
gas.
Fit an interlock circuit or take
suitable steps to ensure an ade-
quate supply of combustion air.
Safety instructions
Safety instructions (cont.)
5675991

6
Installation instructions
Information
Disposal of packaging.......................................................................................... 8
Symbols................................................................................................................ 9
Intended use......................................................................................................... 10
Product information.............................................................................................. 10
Preparing for installation................................................................................... 13
Installation sequence
Mounting the boiler and making connections....................................................... 17
Opening the programming unit............................................................................. 22
Electrical connections........................................................................................... 23
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 26
Further details regarding the individual steps....................................................... 27
Troubleshooting
Function sequence and possible faults................................................................ 50
Fault display......................................................................................................... 51
Repairs................................................................................................................. 56
Changing the gas type
Converting from LPG to natural gas..................................................................... 67
Control unit
Functions and operating conditions in weather-compensated mode................... 69
Designs
Connection and wiring diagrams.......................................................................... 71
Parts lists
Overview of assemblies....................................................................................... 76
Casing assembly.................................................................................................. 78
Heat cell assembly............................................................................................... 80
Burner assembly.................................................................................................. 82
Hydraulic assembly.............................................................................................. 84
Grundfos hydraulic assembly............................................................................... 86
Control unit assembly........................................................................................... 88
Miscellaneous assembly...................................................................................... 90
Index
Index
5675991

7
Specification....................................................................................................... 91
Disposal
Final decommissioning and disposal.................................................................... 92
Certificates
Declaration of conformity...................................................................................... 93
Keyword index.................................................................................................... 95
Index
Index (cont.)
5675991

8
Please dispose of packaging waste in
line with statutory regulations.
DE: Use the disposal system organ-
ised by Viessmann.
AT: Use the ARA statutory disposal
system (Altstoff Recycling Austria
AG, licence number 5766).
CH: Packaging waste is disposed of
by the HVAC contractor.
Information
Disposal of packaging
5675991

9
Sym-
bol
Meaning
Reference to other document
containing further information
1.
Step in a diagram:
The numbers correspond to
the order in which the steps
are carried out.
Warning of material losses and
environmental pollution
Live electrical area
Pay particular attention.
■ Component must audibly
click into place.
or
■ Acoustic signal
■ Fit new component.
or
■ In conjunction with a tool:
Clean the surface.
Dispose of component correct-
ly.
Dispose of component at a
suitable collection point. Do
not dispose of component in
domestic waste.
Information
Symbols
5675991
Installation

10
The appliance is intended solely for
installation and operation in sealed
unvented heating systems that comply
with EN 12828, with due attention paid
to the associated installation, service
and operating instructions. It is only
designed for heating up heating water
that is of potable water quality.
Intended use presupposes that a fixed
installation in conjunction with permissi-
ble, system-specific components has
been carried out.
Commercial or industrial usage for a
purpose other than heating the building
or DHW shall be deemed inappropriate.
Any usage beyond this must be
approved by the manufacturer in each
individual case.
Incorrect usage or operation of the
appliance (e.g. the appliance being
opened by the system user) is prohibi-
ted and will result in an exclusion of lia-
bility. Incorrect usage also occurs if the
components in the heating system are
modified from their intended use (e.g. if
the flue gas and ventilation air paths
are sealed).
Product information
Vitodens 050-W, type BPJD
Preset for operation with natural gas.
Conversion to LPG P requires a gas
conversion kit.
Gas Council No.
■ 29 kW combi: 47 819 31
■ 35 kW combi: 47 819 32
Conversion for other countries
The Vitodens 050-W may generally
only be delivered to countries listed on
the type plate. For deliveries to other
countries, approved contractors must
arrange individual approval on their
own initiative and in accordance with
the law of the country in question.
Product description
The Vitodens 050-W is available as a
gas condensing combi boiler with inte-
gral plate heat exchanger for DHW
heating. For the connection of heating
circuits and the DHW line, see
page 16 onwards.
The Vitodens 050-W is set up for oper-
ation with a constant boiler water tem-
perature.
The appliance is equipped with a
sealed unvented hydraulic system with
2 connections for the heating flow and
return and 2 connections for DHW
heating.
Information
Intended use
5675991