Viessmann Vitodens 100-W Quick guide

Installation and service
instructions
for contractors
VIESMANN
Vitodens 100-W
Type WB1C, 6.5 to 35.0 kW
Wall mounted gas condensing boiler
Natural gas and LPG version
Gas Council no.: 41-819-26 - 29, 47-819-20 - 22
For applicability, see the last page
VITODENS 100-W
5609 059 GB 5/2013 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
designed for qualified personnel.
■ Work on gas equipment must only be
carried out by a qualified 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
■ all legal instructions regarding the pre-
vention of accidents,
■ all legal instructions 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,
■ Gas Safety (Installation & Use) Regu-
lations
– the appropriate Building Regulation
either the Building regulations, the
Building Regulation (Scotland),
Building Regulations (Northern Ire-
land),
– the Water Fittings Regulation or
Water Bylaws in Scotland,
– the current I.E.E. Wiring Regula-
tions.
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■ Never 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.
■ Remove all people from the
danger zone.
■ Notify your gas or electricity
supplier from outside the build-
ing.
■ 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 boiler room.
■ Close all doors leading to the
living space.
Working on the system
■ When using gas as fuel, also close the
main gas shut-off valve and safeguard
against unauthorised reopening.
■ Isolate the system from the power sup-
ply and check that it is no longer 'live',
e.g. by removing a separate fuse or by
means of a main isolator.
■ Safeguard the system against unau-
thorised reconnection.
!Please note
Electronic modules can be dam-
aged by electro-static dis-
charges.
Touch earthed objects, such as
heating or water pipes, to dis-
charge static loads.
Repair work
!Please note
Repairing components which ful-
fil a safety function can compro-
mise the safe operation of your
heating system.
Replace faulty components only
with original Viessmann spare
parts.
Ancillary components, spare and
wearing parts
!Please note
Spare and wearing parts which
have not been tested together
with the heating system can com-
promise its function. Installing
non-authorised components and
non-approved modifications/con-
version can compromise safety
and may invalidate our warranty.
For replacements, use only orig-
inal spare parts from Viessmann
or those which are approved by
Viessmann.
Safety instructions
Safety instructions (cont.)
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Installation instructions
Product information........................................................................................... 6
Preparing for installation................................................................................... 8
Installation sequence
Fitting the boiler and making connections............................................................ 12
Opening the control unit casing............................................................................ 18
Electrical connections........................................................................................... 19
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 25
Further details regarding the individual steps....................................................... 26
Troubleshooting
Function sequence and possible faults................................................................ 46
Fault messages on the display............................................................................. 47
Repairs................................................................................................................. 51
Gas type conversion
Converting from LPG to natural gas .................................................................... 61
Control unit
Functions and operating conditions in weather-compensated mode................... 63
Designs
Connection and wiring diagram............................................................................ 64
Parts lists
Ordering parts...................................................................................................... 66
Overview of the assemblies................................................................................. 67
Sheet metal parts assembly................................................................................. 68
Heat cell assembly............................................................................................... 69
Burner assembly.................................................................................................. 70
Hydraulic assembly.............................................................................................. 72
System boiler hydraulic assembly........................................................................ 74
Combi hydraulic assembly................................................................................... 76
Control unit assembly........................................................................................... 77
Miscellaneous assembly...................................................................................... 79
Specification....................................................................................................... 80
Index
Index
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Certificates
Declaration of conformity...................................................................................... 82
Keyword index.................................................................................................... 83
Index
Index (cont.)
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Vitodens 100-W, type WB1C
Preset for operation with natural gas.
Conversion to LPG P requires a gas con-
version kit.
Gas-Council-Nr.:
■ 19 kW system: 41-819-26
■ 26 kW system: 41-819-27
■ 30 kW system: 41-819-28
■ 35 kW system: 41-819-29
■ 26 kW combi: 47-819-20
■ 30 kW combi: 47-819-21
■ 35 kW combi: 47-819-22
Conversion for other countries
The Vitodens 100-W should generally
only be delivered to those countries
specified on the type plate. For deliveries
to alternative countries, an approved
contractor must arrange individual
approval on his own initiative and in
accordance with the law of the country in
question.
Product description
The Vitodens 100-W is available as a
gas condensing boiler for the connection
of one DHW cylinder and as a gas con-
densing combi boiler with an integral
plate heat exchanger for DHW heating.
For the connection of heating circuits
and the DHW cylinder or the DHW line,
see from page 11.
In the delivered condition, the
Vitodens 100-W is set up for operation
with constant boiler water temperature.
By connecting an outside temperature
sensor (accessory), the boiler can be
operated in weather-compensated
mode.
The following are integrated: one sealed
unvented hydraulic system with 2 con-
nections for heating flow and return, and
2 connections for cylinder heating (gas
condensing boiler) or DHW heating (gas
condensing combi boiler).
These boilers are only intended for
installation in sealed unvented heating
systems. Boilers for open vented heating
systems are also available.
If the Vitodens 100-W is installed in an S
plan or Y plan system, the DHW primary
connections are not used and must be
capped off.
The following components are integra-
ted into the hydraulic system:
■ Circulation pump
■ 3-way diverter valve
■ Safety valve
■ Diaphragm expansion vessel
■ Plate heat exchanger for DHW heating
(gas condensing combi boiler)
DHW heating with DHW cylinder
If a Viessmann Vitocell is connected, a
cylinder temperature sensor will issue
the heat demand (accessory). The cylin-
der temperature sensor is connected to
the boiler control unit. A 230 V cylinder
temperature controller is not required.
If a different DHW cylinder is connected,
the cylinder temperature sensor (acces-
sory) may also be used on this cylinder.
Alternatively, a 230 V cylinder tempera-
ture controller should be connected via
the cylinder demand junction box (part of
the boiler standard delivery).
Product information
Product information
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Accessory connection
Cylinder temperature sensor, outside
temperature sensor and time switch are
connected to the control unit with low
voltage.
Product information
Product information (cont.)
5609 059 GB
Installation

8
Preparing for the boiler installation
Dimensions and connections
34
5
250
68
400
700
58 58
123123
B
AC E
F
D
156
350
125
860
150
AHeating flow
BGas condensing boiler:
Cylinder flow
Gas condensing combi boiler:
DHW
CGas connection
DGas condensing boiler:
Cylinder return
Gas condensing combi boiler:
Cold water
EHeating return
FCondensate drain/safety valve
drain: Plastic hose 7 22 mm
Preparing for installation
Preparing for installation
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Minimum clearances
Maintain a clearance of 700 mm in front
of the Vitodens for maintenance purpo-
ses. Maintenance clearances to the l.h.
or r.h. side of the Vitodens are not
required.
Preparing for installation
Preparing for installation (cont.)
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Installation

10
Fitting the wall mounting bracket
250
A
Ø10
145
AVitodens installation template
Preparing for installation
Preparing for installation (cont.)
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1. Position the supplied installation tem-
plate on the wall.
2. Mark out the rawl plug holes.
3. Drill 7 10 mm holes and insert the
rawl plugs supplied.
4. Fit wall mounting bracket with screws
supplied.
Fit installation aid or mounting frame
Installation aid or mounting frame
installation instructions
Preparing the connections
!Please note
To prevent equipment damage,
install all pipework free of load
and torque stress.
1. Prepare the water connections. Flush
the heating system.
2. Prepare the gas connection.
3. Prepare the electrical connections.
■Power cable NYM-J 3 x 1.5 mm2.
■ Accessory cables:
NYM-O two-core min. 0.5 mm2.
Preparing for installation
Preparing for installation (cont.)
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Installation

12
Removing the front panel and mounting the boiler
2x
2.
3.
1.
1. Undo screws at the bottom of the
boiler; do not remove completely.
2. Remove front panel.
3. Hook the boiler into the wall mounting
bracket.
Installation sequence
Fitting the boiler and making connections
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Making the connections on the water side
For fittings on the heating water
side and DHW side, see separate
installation instructions.
BA DC E
¨
zz
AHeating flow
BGas condensing boiler:
Cylinder flow
Gas condensing combi boiler:
DHW
CGas connection
DGas condensing boiler:
Cylinder return
Gas condensing combi boiler:
Cold water
EHeating return
Gas condensing boiler
AC
E
Note
In accordance to the Fittings Directive
G24.2a this is a temporary connection
and has to be removed immediately after
filling.
Installation sequence
Fitting the boiler and making connections (cont.)
5609 059 GB
Installation

14
Gas condensing combi boiler
A
B
C
DE
F
FFilling loop
Gas connection
A
1. Connect gas shut-off valve to con-
nection A.
Installation sequence
Fitting the boiler and making connections (cont.)
5609 059 GB

15
2. Carry out a tightness test.
Note
Only use suitable and approved leak
detection agents (EN 14291) and
devices to check for leaks. Leak
detection agents with unsuitable con-
stituents (e.g. nitrites, sulphides) can
cause material damage.
Remove residues of the leak detec-
tion agent after testing.
!Please note
Excessive test pressure may
damage the boiler and the gas
valve.
Max. test pressure 150 mbar.
Where higher pressure is
required for tightness tests,
disconnect the boiler and the
gas valves from the gas sup-
ply pipe (undo the fitting).
3. Vent the gas line.
Installation sequence
Fitting the boiler and making connections (cont.)
5609 059 GB
Installation

16
Connection, safety valve and condensate drain
A
■ The condensate pipe is connected
with the discharge pipe of the safety
valve. The condensate hose supplied
meets the temperature requirements
that are part of the CE certification.
■ Connecting the condensate pipe inter-
nally to the domestic waste water sys-
tem, either directly or via a tundish or
washing machine trap, is recommen-
ded.
■ If the condensate pipe is routed out-
side the building, use a pipe with at
least 7 30 mm and protect this pipe
from frost. Avoid long external pipe-
lines.
!Please note
Frozen condensate pipes can
result in faults and damage to
the boiler.
Always insulate condensate
pipes against frost.
■ Observe local building regulations.
Connect condensate pipe A with a con-
stant fall and a pipe vent to the public
sewage system.
Observe the local waste water regula-
tions.
Note
Fill the siphon with water before com-
missioning.
Installation sequence
Fitting the boiler and making connections (cont.)
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Filling the siphon with water
Pour a minimum of 0.3 l of water into the
flue outlet.
!Please note
During commissioning, flue gas
may escape from the condensate
drain.
Always fill the siphon with water
before commissioning.
Balanced flue connection
Connect the balanced flue.
During installation and positioning of the
flue system, observe Part J of the Build-
ing Regulations and BS 5440 building
regulations.
Flue system installation instruc-
tions.
Installation sequence
Fitting the boiler and making connections (cont.)
5609 059 GB
Installation

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3.
2.
4x 1.
2x
!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.
Installation sequence
Opening the control unit casing
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PUMP
X21
L N 1 L N?
GAS
D
X7 FAN
X20
A B
4 3 2 1
OT
CFE
X1
%
%Gas condensing boiler:
■ In the case of Viessmann DHW
cylinders: Cylinder temperature
sensor (plug on the cable harness
outside the control unit)
■ In the case of alternative DHW
cylinders compliant with the G3
Directive:
Cylinder demand junction box (for
connection of a cylinder tempera-
ture controller and a 2-way shut-
off valve)
■ Without DHW cylinder:
For operation without a DHW cyl-
inder, set rotary selector "tw" to
"0".
AOnly for weather-compensated
mode:
Outside temperature sensor (acces-
sory)
BOpenTherm device
CConnecting cable (accessory)
DJumper
EPower supply (230 V, 50 Hz).
See page 23
FVitotrol 100 or on-site room temper-
ature controller (230 V switched
input)
Remove jumper D when making
this connection.
Separate installation instruc-
tions
Information on connecting
accessories
When connecting accessories
observe the separate installation
instructions provided with them.
Installation sequence
Electrical connections
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Installation

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Connection of room temperature controller and DHW cylinder with 230 V cyl-
inder temperature controller
C
%
AED
ACylinder demand terminal box
BJumper, remove when making this
connection
CPower supply (230 V, 50 Hz).
See page 23
DCylinder temperature controller
230 V
ERoom temperature controller
Installation sequence
Electrical connections (cont.)
5609 059 GB