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 1/2012 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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3
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.)
5368 662 GB

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Installation instructions
Preparing for installation
Product information.............................................................................................. 5
Preparing for installation....................................................................................... 6
Installation sequence
Fitting the boiler and making connections............................................................ 9
Opening the control unit casing............................................................................ 14
Electrical connections........................................................................................... 14
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 18
Further details regarding the individual steps....................................................... 19
Troubleshooting
Function sequence and possible faults................................................................ 31
Fault messages on the display............................................................................. 32
Repairs................................................................................................................. 37
Gas type conversion
Changing from LPG to natural gas....................................................................... 44
Control unit
Functions and operating conditions in weather-compensated mode................... 47
Designs
Connection and wiring diagram............................................................................ 49
Parts lists............................................................................................................ 51
Specification....................................................................................................... 54
Certificates
Declaration of conformity...................................................................................... 55
Keyword index.................................................................................................... 56
Index
Index
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Vitodens 100-W, WB1B
Preset for operation with natural gas.
Conversion to LPG P requires a gas conversion kit.
In principle, the Vitodens 100-W may only be supplied to the countries listed on the
type plate. For deliveries to alternative countries, an approved contractor, on his own
initiative, must arrange individual approval in accordance with the law of the country
in question.
Preparing for installation
Product information
5368 662 GB
Installation

6
Preparing for the boiler installation
Dimensions and connections
119
600 43
26
151
a
93
47
25
375
b
A B
C
D
5
AHeating flow 7 22 mm
BHeating return 7 22 mm
CCondensate drain: Plastic hose
7 22 mm
DGas connection R ½
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
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Fitting the wall mounting bracket
25
150
Ø10
≥250
A
B
AVitodens installation template BOpening for the balanced flue
Preparing for installation
Preparing for installation (cont.)
5368 662 GB
Installation

8
1. Align the supplied installation tem-
plate on the wall.
2. Drill 7 10 mm holes and insert the
rawl plugs supplied.
3. Fit wall mounting bracket with screws
supplied.
Preparing the connections
!Please note
To prevent equipment damage,
install all pipework free of load
and torque stresses.
1. Prepare the water connections. Flush
the heating system.
2. Prepare the gas connection.
3. Prepare the electrical connections.
Observe applicable IEEE standards.
■ A 1.5 m power cable is fitted in the
delivered condition.
■ A 1.5 m connecting cable for the
circulation pump is provided sepa-
rately.
■ Accessory cables:
NYM-O two-core min. 0.5 mm2.
Preparing for installation
Preparing for installation (cont.)
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Removing the front panel and mounting the boiler
3.
2.
1.
2x
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.
Note
Align the boiler vertically or horizon-
tally on all three axes.
Installation sequence
Fitting the boiler and making connections
5368 662 GB
Installation

10
Making 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
Installation sequence
Fitting the boiler and making connections (cont.)
5368 662 GB

11
E3-way diverter valve FRadiators
Gas connection
A
1. Connect gas shut-off valve to con-
nection 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 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.)
5368 662 GB
Installation

12
Condensate connection
A
■ Connecting the condensate hose
internally to the domestic waste water
system, either directly or via a drip
water funnel (tundish) is recommen-
ded.
■ If the condensate pipe is routed out-
side the building, use a pipe of at least
7 30 mm and insulate it against frost.
Avoid long external pipelines.
!Please note
A frozen condensate pipe can
result in faults and boiler dam-
age.
Always insulate condensate
lines against frost.
■ Observe the local building regulations.
1. Pull condensate pipe A so far out of
the appliance that no unnecessary
bends are created inside the appli-
ance. Ensure that the siphon is prop-
erly connected.
2. Connect condensate pipe A with a
constant fall and a pipe vent to the
public sewage system.
Observe the local waste water regu-
lations.
Installation sequence
Fitting the boiler and making connections (cont.)
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13
Filling the condensate connection siphon with water
!Please note
At commissioning, flue gas may
be emitted from the condensate
drain.
Therefore fill the siphon with
water before commissioning.
Pour a minimum of 0.3 l of water into the
flue outlet.
Balanced flue connection
A
B
AFlue gas
BVentilation air
Connect the balanced flue.
During installation and positioning of the
flue system, observe building regula-
tions Part L and BS 5440.
Flue system installation instruc-
tions.
Installation sequence
Fitting the boiler and making connections (cont.)
5368 662 GB
Installation

14
!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.
4x
3.
1.
2.
Electrical connections
Information on connecting
accessories
For this connection, observe the
separate installation instructions
provided with the accessories.
Installation sequence
Opening the control unit casing
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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 (acces-
sory).
BConnecting cable (accessory).
CTerminal box cylinder demand
(accessory; 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.
Wire the power supply with a neutral
conductor. Connect water pipes to
the earth bonding of the building in
question.
GConnections for external 230 V con-
trols:
■ Vitotrol 100 (room temperature
controller)
Installation sequence
Electrical connections (cont.)
5368 662 GB
Installation

16
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 cir-
cuits connected, e.g. heating and
hot water, you cannot use a plug-in
timer or programmable room ther-
mostat receiver. Two channel
switching must be external to the
boiler.
The only exception is if weather
compensation is also fitted.
Outside temperature sensor (accessory)
1. Fit outside temperature sensor.
Installation site:
■ 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 ven-
tilation outlets
■ Not immediately below balconies
or gutters
■ Never render over
■ Connection:
2-core lead, length max. 35 m with
a cross-section of 1.5 mm2
2. Plug the power cable supplied with
the outside temperature sensor into
slot "X21".
3. Connect the outside temperature
sensor to terminals 3 and 4 (see
page 15).
Installation sequence
Electrical connections (cont.)
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17
Routing connecting cables and closing the control unit casing
!Please note
Connecting cables will be dam-
aged if they touch hot compo-
nents.
When routing and securing
cables/leads on site, ensure that
the maximum permissible tem-
peratures for these cables/leads
are not exceeded.
2.
3.
1.
Installation sequence
Electrical connections (cont.)
5368 662 GB
Installation

18
For further information regarding the individual steps, see the page indicated
Commissioning steps
Inspection steps
Maintenance steps Page
••• 1. Filling the heating system.............................................. 19
•2. Venting the boiler........................................................... 20
••• 3. Changing to operation with LPG................................... 21
••• 4. Checking the static and supply pressure..................... 21
•5. Checking the CO2 or O2 content.................................... 23
• • 6. Burner removal .............................................................. 24
• • 7. Checking the burner gasket and burner gauze
assembly......................................................................... 25
• • 8. Checking and adjusting electrodes.............................. 26
• • 9. Cleaning the heat exchanger......................................... 27
• • 10. Checking the condensate drain and cleaning the
siphon.............................................................................. 27
• • 11. Burner installation ......................................................... 28
••• 12. Checking all connections on the heating water side
and DHW side for leaks
••• 13. Checking flue system for unrestricted flow and
tightness
••• 14. Checking firm seating of electrical connections
••• 15. Checking all gas equipment for tightness at operating
pressure .......................................................................... 29
• • 16. Fitting the front panel..................................................... 29
•17. Instructing the system user........................................... 30
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
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Filling the heating system
!Please note
Unsuitable fill water increases
the level of deposits and corro-
sion and may lead to boiler dam-
age.
■ Thoroughly flush the entire
heating system prior to filling it
with water.
■ Only fill with water of potable
quality.
■ Soften fill water harder than
300 ppm.
■ An antifreeze additive suitable
for heating systems can be
added to the fill water.
Fill and vent the heating system.
Commissioning, inspection, maintenance
Further details regarding the individual steps
5368 662 GB
Service

20
Venting the boiler
B
A
1. Close shut-off valve in heating water
return.
2. Remove cover panel.
3. Connect drain hose to air vent valve
A with a drain connection.
4. Open air vent valve A and on-site fill
valve in heating water return B.
Vent (flush) under mains pressure
until no more air noise can be
heard.
Note
If the heating system has not been
completely vented, the heating water
flow rate can be too low. This can lead
to the burner being switched off by
internal safety equipment before the
specified set boiler water tempera-
ture is achieved.
5. First close air vent valve A and then
the fill valve in heating water return
B.
6. ■ Sealed unvented heating system:
Adjust operating pressure to
≥ 0.8 bar with fill valve B.
■ Open vented heating system:
The static head must be at least
0.2 bar.
7. Open shut-off valve in heating water
return.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5368 662 GB