Viessmann Vitodens 111-W Guide rapide
Installation and service
instructions
for contractors
VIESMANN
Vitodens 111-W
Type B1LA, 6.5 to 35.0 kW
Gas condensing storage combi boiler
Natural gas and LPG version
Gas Council no.: 47-819-23; 47-819-24; 47-819-25
For applicability, see the last page
VITODENS 111-W
5618 648 GB 3/2012 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
5618 648 GB
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.)
5618 648 GB
4
Service instructions
Product information
Product information.............................................................................................. 6
Preparing for the boiler installation....................................................................... 7
Installation instructions
Installation sequence
Fitting the wall mounting bracket.......................................................................... 9
Fitting the boiler and making connections............................................................ 10
Opening the control unit enclosure....................................................................... 16
Electrical connections........................................................................................... 16
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 20
Further details regarding the individual steps....................................................... 22
Troubleshooting
Function sequence and possible faults................................................................ 42
Fault messages on the display............................................................................. 43
Repairs................................................................................................................. 47
Gas type conversion
Converting from LPG to natural gas..................................................................... 56
Control unit
Functions and operating conditions in weather-compensated mode................... 58
Designs
Connection and wiring diagram............................................................................ 60
Parts lists
Ordering parts...................................................................................................... 62
Overview of the assemblies................................................................................. 63
Casing assembly.................................................................................................. 64
Heat cell assembly............................................................................................... 65
Burner assembly.................................................................................................. 66
Hydraulic assembly.............................................................................................. 68
Aqua-plate assembly............................................................................................ 70
Control unit assembly........................................................................................... 71
Cylinder assembly................................................................................................ 73
Miscellaneous assembly...................................................................................... 74
Index
Index
5618 648 GB
5
Specification....................................................................................................... 76
Certificates
Declaration of conformity...................................................................................... 77
Keyword index.................................................................................................... 78
Index
Index (cont.)
5618 648 GB
6
Vitodens 111-W, type B1LA
Preset for operation with natural gas.
Conversion to LPG P requires a gas con-
version kit.
Conversion for other countries
The Vitodens 111-W should generally
only be supplied to countries listed on
the type plate. For deliveries to alterna-
tive 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 111-W is equipped with a
cylinder and an integral plate heat
exchanger as primary store system for
DHW heating. For the connection of
heating circuits and the DHW line, see
from page 11.
In the delivered condition, the
Vitodens 111-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 DHW heating.
The following components are integra-
ted into the hydraulic system:
■ Circulation pump
■ 3-way diverter valve
■ Safety valve
■ Heating water expansion vessel and
DHW expansion vessel
■ Cylinder and plate heat exchanger for
DHW heating
Accessory connection
Outside temperature sensor and time
switch are connected with low voltage to
the control unit.
Product information
Product information
5618 648 GB
7
Dimensions and connections
26
480
945
1003
497
740
900
A
BC
DE
F
G
H
5
E
150
166
AArea for electrical connections
BHeating flow 7 22 mm
CCondensate drain
DHeating return 7 22 mm
EFilling loop
FGas connection 7 22 mm
GCold water 7 15 mm
HDHW 7 15 mm
Product information
Preparing for the boiler installation
5618 648 GB
Service
8
Preparing the connections
Note
This boiler (IP rating: IP X4 D) is
approved for installation in wet rooms
inside safety zone 1 in accordance with
IEEE Wiring Regulations, providing the
occurrence of hosed water can be ruled
out.
Observe the IEEE Wiring Regulations.
1. Prepare the water connections. Flush
the heating system.
2. Prepare the gas connection.
3. Prepare the electrical connections.
■ In the delivered condition, the
power cable with mains plug is con-
nected inside the control unit.
■ Accessory cables:
NYM-O two-core min. 0.5 mm2.
Product information
Preparing for the boiler installation (cont.)
5618 648 GB
9
250
Ø10
129
497
Installation sequence
Fitting the wall mounting bracket
5618 648 GB
Installation
10
Removing the front panel and mounting the boiler
Note
When mounting on the wall, observe the
following: Weight excl. packaging:
approx. 65 kg.
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
5618 648 GB
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8
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