Viessmann VITODENS 343-F WS4A Quick guide

VIESMANN
Installation and service
instructions
for contractors
Vitodens 343-F
Type WS4A
Compact Energy Tower with a gas fired condensing boiler as compact model
Natural gas and LPG version
(GC no) 47-819-08
For applicability, see the last page
VITODENS 343-F
5592 883 GB 8/2007 Please keep safe.

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
environmental pollution.
Note
Details identified by the word "Note"
contain 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 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
Observe the following when working
on this system
&all legal instructions regarding the
prevention of accidents,
&all legal instructions regarding
environmental 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.
If you smell gas
Danger
Escaping gas can lead to
explosions which may result in
serious injury.
&Never smoke. Prevent naked
flames and sparks. Never
switch lights or electrical
appliances 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
building.
&Shut off the electricity supply
to the building from a safe
place (outside the building).
If you smell flue gas
Danger
Flue gas can lead to life-threa-
tening poisoning.
&Shut down the heating sys-
tem.
&Ventilate the boiler room.
&Close all doors leading to the
living space.
Safety instructions
2
Safety instructions
5592 883 GB

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
supply 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
unauthorised reconnection.
!Please note
Electronic modules can be
damaged 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
fulfil a safety function can com-
promise 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
compromise its function. Instal-
ling non-authorised compo-
nents and non-approved
modifications/conversion can
compromise safety and may
invalidate our warranty.
For replacements, use only ori-
ginal spare parts from
Viessmann or those which are
approved by Viessmann.
Safety instructions (cont.)
3
Safety instructions
5592 883 GB

Installation instructions
Preparing for installation
Product information .................................................................................... 6
Handling..................................................................................................... 6
Positioning ................................................................................................. 6
Clearance dimensions ................................................................................ 7
On site connections .................................................................................... 8
Preparing the installation of the compact boiler ........................................... 9
Installation sequence
Fitting the connections................................................................................ 14
Electrical connections................................................................................. 17
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance ................................... 21
Further details regarding the individual steps .............................................. 23
Coding
Code 1........................................................................................................ 66
Code 2........................................................................................................ 68
Resetting codes to their delivered condition ................................................ 84
Service scans
Service level overview ............................................................................... 85
Temperatures, boiler coding card and brief scans ....................................... 86
Checking outputs (relay test) ...................................................................... 88
Scanning operating conditions and sensors ................................................ 89
Troubleshooting
Fault display ............................................................................................... 91
Fault codes................................................................................................. 92
Repairs ...................................................................................................... 99
Function description
Vitotronic 200, type HO1 ............................................................................. 114
Extensions for external connections (accessories) ...................................... 117
Control functions ........................................................................................ 120
Remote control DIP switches ...................................................................... 126
Electronic combustion control unit............................................................... 127
Designs
Connection and wiring diagram –internal connections I............................... 129
Index
4
Index
5592 883 GB

Connection and wiring diagram –internal connections II.............................. 131
Connection and wiring diagrams –external connections.............................. 133
Parts lists .................................................................................................. 135
Commissioning/service reports ............................................................... 143
Specification............................................................................................. 144
Certificates
Declaration of conformity ............................................................................ 146
Manufacturer's certificate according to the 1st BImSchV [Germany]............. 147
Keyword index .......................................................................................... 148
Index (cont.)
5
Index
5592 883 GB

Vitodens 343-F, WS4A
Set up for operation with natural gas.
May be converted to LPG.
The Vitodens 343-F should generally only be delivered to those countries speci-
fied on the type plate. For deliveries to alternative countries, an approved con-
tractor, on his own initiative, must arrange individual approval in accordance
with the law of the land.
Handling
To protect the equipment, transport
the system inside its crate, where
possible. Whilst handling the device,
leave the pallet beneath the unit,
where possible.
!Please note
To avoid equipment damage
whilst handling the device with-
out its crate or pallet, never
place the device
on its front or side panels or
apply loads to these areas.
Height of unit when tilted
&With pallet 2395 mm
&Without pallet 2085 mm
Positioning
Installation room requirements
Required room height: min. 2400 mm.
Total weight incl. DHW fill: 495 kg. !Please note To prevent building damage,
observe the permissible
floor loading.
Product information
6
Preparing for installation
5592 883 GB

All measurements in mm. If appliance
is fitted in a cupboard additional
space for the DHW expansion vessel
(see G3 instructions) and an approx.
40l solar expansion vessel have to be
considered.
Plan view
AT&P valve drain pipe
BHydraulic connections
CCable entry
DRequired clearance for the T&P
valve drain (either on the left or on
the right)
ERequired clearance for removing
the front panel (also maintain this
clearance when fitting the facia
frame)
FBalanced flue connection
GGas connection
Clearance dimensions
7
Preparing for installation
5592 883 GB
Installation

AVitodens dimensions
BArea for on-site hydraulic connec-
tions
&Compulsory with connection
panel
&Recommendation without con-
nection panel
CCondensate drain
DGas connection
ETop edge –finished floor
FCable entry
Allow all cables/leads to protrude
approx. 2000 mm from the wall
On site connections
8
Preparing for installation
5592 883 GB

Removing the front panels and fitting the quick acting air
vent valve
1. Position the compact boiler at a
distance of approx. 500 mm from
the on-site drain connection.
2. Pull the lower front panel at its
upper edge forward and lift out
upwards.
Preparing the installation of the compact boiler
9
Preparing for installation
5592 883 GB
Installation

3. Pull the front panel at its upper
edge forward and lift out upwards.
4. Remove the plugs from the top of
the compact boiler and insert the
quick acting air vent valve (secured
to the top of the boiler).
Preparing the installation of the compact boiler (cont.)
10
Preparing for installation
5592 883 GB

Fitting the T&P valve drain line
Preparing the installation of the compact boiler (cont.)
11
Preparing for installation
5592 883 GB
Installation

1. Fit the retaining clip to the back
panel.
2. Secure the elbow fitting to the pre-
assembled drain pipe.
Note
The drain line may be fitted either
on the r.h. or the l.h. side to suit
local conditions.
3. Fit the drain pipe to the elbow fit-
ting.
4. Connect the drain pipe to the on-
site drain connection.
Connecting the condensate hose
1. Pull the drain hose from the open-
ing and route as backup loop
(siphon).
2. Fill approx. 100 ml water into the
drain hose.
3. Connect the drain hose to the on-
site drain connection.
Note
Test for leaks prior to finalising the
positioning.
4. Push the boiler against the wall.
Preparing the installation of the compact boiler (cont.)
12
Preparing for installation
5592 883 GB

On-site connections at the connection panel (accessory)
ASolar flow
BHeating flow
CCold water
DDHW circulation
EDHW
FHeating return
GSolar return
Installation position, see page 8.
All connections Rp¾"
Connection panel installation
instructions.
Preparing the installation of the compact boiler (cont.)
13
Preparing for installation
5592 883 GB
Installation

Connections on the DHW side
ADHW Rp ¾"
BDHW circulation Rp ¾"
CCold water Rp ¾"
Connect the pipework on the DHW
side with detachable fittings. Seal off
those connections that are not
required.
ADHW
BDHW circulation pump
CSpring-loaded check valve
DHydraulic connection area
Vitodens
EFlow regulating valve
FPressure gauge connection
GDrain valve
HShut-off valve
KCold water
LDrinking water filter
MPressure reducer
NNon-return valve/pipe separator
Fitting the connections
14
Installation sequence
5592 883 GB

Observe DIN 1988 and DIN 4753 [or
local regulations] for the connection
on the DHW side.
Danger
DHW temperatures in excess
of 60 °C can lead to scalding.
Install an anti-scalding protec-
tion when temperatures in
excess of 60 °C occur.
Note
The safety valve, shut-off valve and
drain valve plus the check valve on
the DHW side are already integrated
into the boiler.
Note
Please read the additional mandatory
installation and maintenance instruc-
tions to comply with G3 Building regu-
lation and the requirements of the UK
Water Supply (Water Fittings) Regula-
tions/Scoitish Water Bylaws.
Heating circuit connection
AHeating flow (Multi-connect sys-
tem)
BHeating return (Multi-connect sys-
tem)
1. Flush the heating system thor-
oughly.
2. Connect the heating circuit.
Fitting the connections (cont.)
15
Installation sequence
5592 883 GB
Installation

Solar circuit connection
ASolar flow (Multi-connect system)
BSolar return (Multi-connect sys-
tem)
Connect the solar circuit.
Note
The solar circuit pump is integrated
into the Vitodens.
Solar heating system installa-
tion instructions.
Flue gas connection
Connect the balanced flue. Flue gas system installation
instructions.
Fitting the connections (cont.)
16
Installation sequence
5592 883 GB

Gas connection
AGas connection
Notes regarding operation with
LPG
We recommend the installation of an
external safety solenoid valve when
installing the compact boiler in rooms
below ground level.
1. Carry out a leak/soundness test.
!Please note
Excessive test pressure
may damage the compact
boiler and the gas valve.
Max. test pressure 150
mbar. Where higher pres-
sure is required for sound-
ness tests, separate the
compact boiler and the gas
valves from the gas supply
pipe (undo the fitting).
2. Vent the gas supply pipe.
Conversion to other gas
types:
See "Commissioning, inspec-
tion, maintenance"
Electrical connections
Information regarding the connection of accessories
For details of accessories, also observe their separate installation
instructions provided.
Fitting the connections (cont.)
17
Installation sequence
5592 883 GB
Installation

1. Remove the cover from the wiring
chamber.
2. Route the external cables between
the side panel and the cap panel
and route them to the wiring cham-
ber.
!Please note
Power cables will be
damaged if they contact hot
parts.
When routing and securing
power cables on site, ensure
that the maximum permissi-
ble temperatures for these
cables are not exceeded.
Electrical connections (cont.)
18
Installation sequence
5592 883 GB

3. Bundling cables with cable ties and
securing them to the side panel
External connections at the control unit
Plug 230 V
sF Solar circuit pump (connected in
the delivered condition)
fÖ Power supply
&Danger
Incorrect core termina-
tions can cause severe
injuries and damage to
the equipment.
&Take care not to inter-
change wires "L1" and
"N".
&Install an isolator in the power
supply line that simultaneously
isolates all non-earthed con-
ductors from the mains with at
least 3 mm contact separation.
&Max. fuse rating 16 A.
lH Power supply accessories (230
V/50 Hz). Where the boiler is
installed in a wet area, the con-
nection of accessories to the
power supply must not be carried
out at the control unit. The power
supply for accessories can be
made immediately at the control
unit, if the compact boiler is
installed outside wet areas. This
connection is directly controlled
with the system ON/OFF switch
(max. 3 A).
aBH See lH.
Electrical connections (cont.)
19
Installation sequence
5592 883 GB
Installation

Low voltage plugs
!Outside temperature sensor
(only for weather-compensated
control units).
Terminals X3.1 - X3.2.
Installation:
&North or north-western 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
ventilation outlets
&Not immediately below balco-
nies or gutters
&Never render over
&2-core lead, max. 35 m length
with a cross-section of
1.5 mm
2
?Flow temperature sensor for low
loss header (accessories)
Terminals X3.4 - X3.5.
&Solar temperature sensor
Terminals X3.8 - X3.9.
NOTE: If no solar panels are
fitted to the appliance the solar
sensor has to be connected
otherwise the appliance is going
into an error code. Also switch
relay 1 off (see page 64 Manual
mode 0).
aVG KM BUS subscriber (acces-
sories)
Terminals X3.6 - X3.7.
&Vitotrol 200 or 300 remote con-
trol
&Vitocom 100
&Extension kit for a heating cir-
cuit with mixer
&Vitosolic
&External extension H1 or H2
Refit the cover to the wiring chamber
(see page 18).
Electrical connections (cont.)
20
Installation sequence
5592 883 GB