Viessmann Vitodens 100-W Quick guide

Installation and service
instructions
for contractors
VIESMANN
Vitodens 100-W
Type WB1B, 7.9 to 35.0 kW
Wall mounted gas condensing boiler
Natural gas and LPG version
Gas Council No.: 41-819-21; 41-819-22; 41-819-23; 41-819-24;
41-819-25
For applicability, see the last page
VITODENS 100-W
5368 662 GB 6/2016 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 must only
be carried out by a registered gas fit-
ter.
■ Work on electrical equipment must
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-TR Gas,
ÖVGW-TRF and ÖVE
cSEV, SUVA, SVGW, SVTI,
SWKI, VKF and EKAS guideline
1942: LPG, part 2
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.
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.
Safety instructions
Safety instructions
5368 662 GB

3
!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 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.
Safety instructions
Safety instructions (cont.)
5368 662 GB

4
What to do if water escapes from the
appliance
Danger
When water escapes from the
appliance there is a risk of elec-
trocution.
Switch off the heating system at
the external isolator (e.g. fuse
box, domestic power distribu-
tion).
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 an adequate supply of
combustion air.
Instruct system users that subsequent
modifications to the building character-
istics are not permissible (e.g. cable/
pipework routing, cladding or parti-
tions).
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-closable.
Extractors
Operating appliances that extract air to
the outside (cooker hoods, extractors,
air conditioning units, etc.) can create
negative pressure. If the boiler is oper-
ated 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
suitable steps to ensure an ade-
quate supply of combustion air.
Safety instructions
Safety instructions (cont.)
5368 662 GB

5
Service instructions
Information
Symbols................................................................................................................ 6
Intended use......................................................................................................... 7
Product information.............................................................................................. 7
Installation instructions
Preparing for installation................................................................................... 8
Installation sequence
Mounting the boiler and making connections....................................................... 12
Opening the control unit enclosure....................................................................... 17
Electrical connections........................................................................................... 18
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 21
Further details regarding the individual steps....................................................... 22
Troubleshooting
Function sequence and possible faults................................................................ 36
Fault display......................................................................................................... 37
Repairs................................................................................................................. 42
Gas type conversion
Changing from LPG to natural gas....................................................................... 49
Control unit
Functions and operating conditions in weather-compensated mode................... 52
Designs
Connection and wiring diagram............................................................................ 54
Parts lists............................................................................................................ 56
Specification....................................................................................................... 60
Certificates
Declaration of conformity...................................................................................... 62
Keyword index.................................................................................................... 63
Index
Index
5368 662 GB

6
Symbol Meaning
Reference to other document containing further information
1.
Step in a diagram:
The numbers correspond to the order in which the steps are car-
ried 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 correctly.
Dispose of component at a suitable collection point. Do not dis-
pose of component in domestic waste.
Information
Symbols
5368 662 GB

7
The appliance is intended solely for
installation and operation in open ven-
ted and sealed unvented heating sys-
tems that comply with EN 12828, with
due attention paid to the associated
installation, service and operating
instructions. It is only designed for heat-
ing 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 100-W, type WB1B
Preset for operation with natural gas.
Conversion to LPG P requires a gas
conversion kit.
Conversion for other countries
The Vitodens 100-W may only be deliv-
ered to countries listed on the type
plate. For deliveries to other countries,
approved contractors must arrange
individual approval on their own initia-
tive and in accordance with the law of
the country in question.
Information
Intended use
5368 662 GB
Service

8
Preparing for boiler installation
Dimensions and connections
119
600 43
26
151
a
93
47
25
375
b
A B
C
D
5
100
250
AHeating flow 7 22 mm
BHeating return 7 22 mm
CCondensate drain: Plastic hose
7 22 mm
DGas connection R ½
Preparing for installation
Preparing for installation
5368 662 GB

9
Rated heating output
range
kW 7.9 - 13 7.9 - 16 7.9 - 19 7.9 - 26 11.0 - 35
a mm 285 285 285 285 340
b mm 123 123 123 123 171
Preparing for installation
Preparing for installation (cont.)
5368 662 GB
Installation

10
Fitting the wall mounting bracket
25
150
Ø10
≥250
A
B
AVitodens installation template BOpening for the balanced flue pipe
Preparing for installation
Preparing for installation (cont.)
5368 662 GB

11
1. Position the supplied installation
template on the wall.
2. Drill 7 10 mm holes and insert the
rawl plugs supplied.
3. Fit the wall mounting bracket with
the screws supplied.
Preparing the connections
!Please note
To prevent appliance damage,
connect 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.
Observe applicable IEEE stand-
ards.
■ A 1.5 m power cable is fitted in
the delivered condition.
■ A 1.5 m connecting cable for the
circulation pump is provided sep-
arately.
■ Cables for accessories:
NYM-O 2-core min. 0.5 mm2.
Preparing for installation
Preparing for installation (cont.)
5368 662 GB
Installation

12
Removing the front panel and mounting the boiler
3.
2.
1.
2x
1. Undo the screws on the underside
of the boiler; do not remove them
completely.
2. Remove front panel.
3. Hook the boiler into the wall mount-
ing bracket.
Note
Align the boiler vertically and hori-
zontally on all 3 axes.
Installation sequence
Mounting the boiler and making connections
5368 662 GB

13
Fitting the connections on the water side
A BA B
AHeating water flow
BHeating water return
Note
Install a shut-off valve and drain & fill
valve on site in the heating water
return.
Y-plan system
A
B
E
F F
C
D
ACylinder
BVitodens 100-W
CCirculation pump
DFeed and expansion tank
E3-way diverter valve
FRadiators
Installation sequence
Mounting the boiler and making connections (cont.)
5368 662 GB
Installation

14
Gas connection
A
1. Connect the gas shut-off valve to
connection A.
2. Carry out a tightness test.
Note
Only use suitable and approved
leak detection agents (EN 14291)
and devices for the tightness test.
Leak detection agents with unsuita-
ble constituents (e.g. nitrides, sul-
phides) can cause material dam-
age.
Remove leak detection agent resi-
dues after testing.
!Please note
Excessive test pressure will
damage the boiler and the
gas train.
Max. test pressure
150 mbar. If a higher pres-
sure is required for tightness
tests, disconnect the boiler
and the gas train from the
main supply pipe (undo the
fitting).
3. Purge the gas line.
Installation sequence
Mounting the boiler and making connections (cont.)
5368 662 GB

15
Condensate connection
A
Note
■Connect condensate pipe A with a
pipe vent to the domestic waste
water system, routing it inside the
building as far as possible.
■ If the condensate pipe is routed out-
side the building, use a pipe with
min.
7
30 mm and protect it from
frost. Avoid long external pipe runs.
!Please note
A frozen condensate pipe can
result in faults and damage to
the boiler.
Always protect condensate
pipes against frost.
■ Observe local building regulations.
1. Pull condensate pipe A out of the
appliance far enough to prevent
unnecessary bends inside the
appliance. Ensure that the trap is
properly connected.
2. Connect condensate pipe A to the
public sewage system with a con-
stant fall and a pipe vent.
Observe local waste water regula-
tions.
Installation sequence
Mounting the boiler and making connections (cont.)
5368 662 GB
Installation

16
Filling the condensate connection trap with water
!Please note
During commissioning, flue gas
may escape from the conden-
sate drain.
Therefore fill the trap with water
before commissioning.
Pour a minimum of 0.3 l of water into
the flue gas connection.
Balanced flue connection
A
B
AFlue gas
BSupply air
Connect the balanced flue pipe.
During installation and positioning of
the flue system, observe Building Reg-
ulations Part L and BS 5440.
Flue system installation instruc-
tions
!Please note
When using the Viessmann flue
system, please read the instruc-
tions.
The flue system must be free to
expand and contract. Therefore
no screws are required unless
these are specifically mentioned
in the instructions.
The flue system must be sup-
ported in accordance with the
flue instructions. Different manu-
facturers have different joining
systems.
Do not mix pipes, fittings or join-
ing systems from different man-
ufacturers.
Installation sequence
Mounting the boiler and making connections (cont.)
5368 662 GB

17
Do not carry out commissioning until
the following conditions are met:
■ Free passage through the flue gas
pipes.
■ Flue system with positive pressure is
gas-tight.
■ Apertures for ensuring sufficient com-
bustion air supply are open and can-
not be closed off.
■ Applicable regulations on installing
and commissioning flue systems
have been followed.
Danger
Leaking or blocked flue systems
or an insufficient supply of com-
bustion air cause life threatening
poisoning due to carbon monox-
ide in the flue gas.
Ensure the flue system functions
correctly. Apertures for combus-
tion air supply must not be able
to be closed off.
Opening the control unit enclosure
!Please note
Electronic assemblies can be
damaged by electrostatic dis-
charge.
Prior to commencing any work,
touch earthed objects such as
heating or water pipes to dis-
charge static loads.
4x
3.
1.
2.
Installation sequence
Mounting the boiler and making connections (cont.)
5368 662 GB
Installation

18
Information on connecting
accessories
When connecting accessories
observe the separate installation
instructions provided with them.
PUMP
X21
L N 1 L N?
GAS E
X7 FAN
X20
A
4 3 2 1
BGF
5
X1
C
D
M
1~
BN
BU GN/YE
AOnly for weather-compensated
mode:
Outside temperature sensor
(accessories).
BConnecting cable (accessories).
CCylinder demand terminal box
(accessories; see separate installa-
tion instructions).
DCirculation pump connecting cable
(supplied).
Note
If the circulation pump is not con-
nected to the control unit, connect
an external frost stat.
EJumper (1 - L).
FPower supply (230 V, 50 Hz).
Danger
Incorrect core allocation can
result in serious injury and
damage to the appliance.
Never interchange cores
"L1" and "N".
The power supply must be from a
fused spur with a 2-pole isolator
switch, fitted with a 3 A fuse.
Installation sequence
Electrical connections
5368 662 GB

19
Wire the power supply with a neu-
tral conductor. Connect water pipes
to the earth bonding of the building
in question.
GConnections for external 230 V
controls:
■ Vitotrol 100 (room temperature
controller)
Separate installation
instructions
■ On-site room temperature con-
troller
■ Input for Y-plan or S-plan heating
systems
Remove jumper E (1 - L) when
connecting a 230 V control, leaving
the capacitor in place.
Take power for external controls
from "L" and "N". The switched live
to start the boiler goes into "1".
Please note that if there are two
circuits connected, e.g. heating
and hot water, you cannot use a
plug-in timer or programmable
room thermostat receiver. Two
channel switching must be external
to the boiler.
The only exception is if weather
compensation is also fitted.
Outside temperature sensor (accessories)
1. Fit the outside temperature sensor.
Installation location:
■ North or north-westerly wall, 2 to
2.5 m above ground level. In
multi storey buildings, in the
upper half of the second floor
■ Not above windows, doors or
vents
■ Not immediately below balconies
or gutters
■ Never render over
■ Connection:
2-core lead, length up to 35 m
with a cross-section of 1.5 mm2
2. Plug the connecting cable supplied
with the outside temperature sen-
sor into slot "X21".
3. Connect the outside temperature
sensor to terminals 3 and 4 (see
page 18).
Installation sequence
Electrical connections (cont.)
5368 662 GB
Installation

20
Routing connecting cables and closing the control unit enclo-
sure
!Please note
Connecting cables/leads will be
damaged if they touch hot com-
ponents.
When routing and securing
cables/leads on site, ensure that
the maximum permissible tem-
perature for these is not excee-
ded.
2.
3.
1.
Installation sequence
Electrical connections (cont.)
5368 662 GB