Viessmann Vitopend 100-W Operating instructions

Installation and service
instructions
for contractors
VIESMANN
Vitopend 100-W
Type WH1D, 10.5 to 24 kW and 13.5 to 30 kW
Gas system and combi boilers
For open flue operation
Natural gas and LPG version
For applicability, see the last page
VITOPEND 100-W
5848 649 GB 10/2013 Please keep safe.

2
Please follow these safety instructions closely to prevent accidents and mate-
rial 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" con-
tain additional information.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
■ Work on gas installations must only be
carried out by a registered gas fitter.
■ Work on electrical equipment must
only be carried out by a qualified elec-
trician.
■ The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations
Observe the following when working on
this system:
■ Statutory regulations regarding the
prevention of accidents
■ Statutory regulations regarding envi-
ronmental protection
■ The Code of Practice of relevant trade
associations
■ All current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards
aÖNORM, EN, ÖVGW-TR Gas,
ÖVGW-TRF and ÖVE
cSEV, SUVA, SVGW, SVTI,
SWKI, VKF and EKAS guideline
1942: LPG, part 2
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■ Do not smoke. Prevent naked
flames and sparks. Do not
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
supplier and your local heating
contractor from outside the
building.
■ Shut off the electricity supply to
the building from a safe place
(outside the building).
Safety instructions
Safety instructions
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If you smell flue gas
Danger
Flue gas can lead to life threat-
ening poisoning.
■ Shut down the heating system.
■ Ventilate the installation site.
■ Close all doors in the living
space.
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
causes. Ensure a sufficient supply of
combustion air.
Instruct system users that subsequent
modifications to the building characteris-
tics are not permissible (e.g. cable/pipe-
work routing, cladding or partitions).
Danger
Leaking or blocked flue systems,
or an insufficient supply of com-
bustion air can cause life threat-
ening poisoning from carbon
monoxide in the flue gas.
Ensure the flue system is in
proper working order. Apertures
for supplying combustion air
must be non-closable.
Extractors
Operating appliances that extract air to
the outside (cooker hoods, extractors, air
conditioning units, etc.) can create neg-
ative pressure. If the boiler is operated at
the same time, this can lead to reverse
flow of the flue gas.
Danger
The simultaneous operation of
the boiler and appliances that
extract air to the outside can
result in life threatening poison-
ing due to reverse flow of the flue
gas.
Fit an interlock circuit or take suit-
able steps to ensure a sufficient
supply of combustion air.
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 sup-
ply (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.
Danger
Hot surfaces can cause burns.
■ Before maintenance or service
work, switch OFF the appli-
ance 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.
Before beginning work, touch
earthed objects, such as heating
or water pipes, to discharge static
loads.
Safety instructions
Safety instructions (cont.)
5848 649 GB

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Repair work
!Please note
Repairing components that fulfil a
safety function can compromise
the safe operation of the sys-
tem.
Faulty components must be
replaced with original 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 compromise
its function. Installing non-author-
ised components and making
non-approved modifications or
conversions can compromise
safety and may invalidate the
warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5848 649 GB

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Installation instructions
Preparing for installation................................................................................... 7
Installation sequence
Mounting the boiler and making connections....................................................... 9
Flue gas connection............................................................................................. 11
Gas connection.................................................................................................... 12
Opening the control unit enclosure....................................................................... 13
Electrical connections........................................................................................... 14
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 17
Further details regarding the individual steps....................................................... 18
Troubleshooting
Function sequence and possible faults................................................................ 37
Fault indicators on the display.............................................................................. 38
Repairs................................................................................................................. 40
Function description
Control and display elements............................................................................... 46
Heating mode....................................................................................................... 46
DHW heating........................................................................................................ 46
Extension for external connections (accessory)................................................... 47
Designs
Connection and wiring diagram............................................................................ 48
Parts lists
Ordering parts...................................................................................................... 50
Overview of the assemblies................................................................................. 51
Casing assembly.................................................................................................. 52
Heat cell assembly............................................................................................... 53
Burner assembly.................................................................................................. 55
Hydraulic assembly.............................................................................................. 56
Hydraulic assembly, system boiler....................................................................... 58
Hydraulic assembly, combi boiler......................................................................... 60
Control unit assembly........................................................................................... 62
Miscellaneous assembly...................................................................................... 64
Commissioning/service reports........................................................................ 65
Index
Index
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Specification....................................................................................................... 66
Certificates
Declaration of Conformity for the Vitopend 100-W............................................... 68
Keyword index.................................................................................................... 69
Index
Index (cont.)
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Vitopend 100-W, type WH1D
Set up for operation with natural gas E.
May be converted to alternative gas
types with a conversion kit.
The Vitopend 100-W must only be deliv-
ered to the countries specified on the
type plate. For deliveries to alternative
countries, approved contractors must
arrange individual approval on their own
initiative and in accordance with the law
of the land.
Intended use
The appliance is only intended to be
installed and operated in sealed unven-
ted heating systems that comply with
EN 12828, with due attention paid to the
associated installation, service and
operating instructions. It is only designed
for the heating of water that is of potable
water quality.
Intended usage presupposes that a fixed
installation in conjunction with permissi-
ble, system-specific components has
been carried out.
Commercial or industrial usage for a pur-
pose other than heating the building or
DHW does not comply with regulations.
Any usage beyond this must be
approved by the manufacturer for the
individual case.
Incorrect usage or operation of the appli-
ance (e.g. the appliance being opened
by the system user) is prohibited and
results in an exclusion of liability. Incor-
rect usage also occurs if the components
in the heating system are modified from
their intended function (e.g. if the flue
gas and ventilation air paths are
sealed).
Preparing for installation
Preparing for installation
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Installation

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Cold water installation
ACold water connection, boiler
BDrain outlet
CVisible discharge pipe outlet point
DSafety valve
ENon-return valve
FShut-off valve
GCold water
HSafety assembly
A safety assembly H to DIN 1988 and
EN 806 is required if the mains water
supply pressure exceeds 10 bar (1.0
MPa), and no DHW pressure reducing
valve is installed (to DIN 4753).
Only use a non-return valve or a com-
bined shut-off and non-return valve in
conjunction with a safety valve.
If the safety valve is used, the cold water
shut-off valve on the boiler must not be
shut off.
Remove the toggle on the cold water
shut-off valve (if installed) to prevent it
being shut off manually.
Shock arrestor
If draw-off points that could cause pres-
sure peaks (water hammer/shock) are
connected to the same pipework as the
boiler (such as pressure washers, wash-
ing machines or dishwashers), we would
recommend the installation of a shock
arrestor near the source of such pres-
sure shocks.
g: Fit a small domestic expansion ves-
sel if water hammer occurs.
Preparing for installation
Preparing for installation (cont.)
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!Please note
To prevent appliance damage,
connect all pipework free of load
and torque stress.
Note
Prepare the gas, water and power con-
nections using installation template A
supplied.
≥ 350
Ø10
AInstallation template
Installation sequence
Mounting the boiler and making connections
5848 649 GB
Installation

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2.
1.
3.
2x
Installation sequence
Mounting the boiler and making connections (cont.)
5848 649 GB