Viessmann VITODENS 200 Istruzioni operative
VIESMANN
Service instructions
for contractors
Vitodens 200
Type WB2A, 8.8 to 20.0 kW
Wall mounted gas fired condensing boiler
Natural gas and LPG version
For applicability, see the last page
VITODENS 200
5692 580 GB 4/2006 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
5692 580 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 mains isola-
tor.
&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
5692 580 GB
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance ................................... 5
Further details regarding the individual steps .............................................. 7
Coding
Code 1........................................................................................................ 35
Code 2........................................................................................................ 38
Resetting codes to their delivered condition ................................................ 57
Service scans
Service level overview ............................................................................... 58
Temperatures, boiler coding card and brief scans ....................................... 59
Checking outputs (relay test) ...................................................................... 62
Scanning operating conditions and sensors ................................................ 63
Troubleshooting
Fault display ............................................................................................... 66
Fault codes................................................................................................. 68
Repairs ...................................................................................................... 78
Function description
Constant temperature control unit ............................................................... 86
Weather-compensated control unit.............................................................. 87
Extensions for external connections (accessories) ...................................... 89
Control functions ........................................................................................ 93
Remote control DIP switches ...................................................................... 99
Designs
Connection and wiring diagrams –internal connections .............................. 101
Connection and wiring diagrams –external connections.............................. 102
Parts lists .................................................................................................. 104
Commissioning/service reports ............................................................... 110
Specification............................................................................................. 111
Certificates
Declaration of conformity ............................................................................ 113
Manufacturer's certificate according to the 1st BImSchV [Germany]............. 114
Keyword index .......................................................................................... 115
Index
4
Index
5692 580 GB
For further information regarding the individual steps, see the page indicated
Commissioning steps
Inspection steps
Maintenance steps Page
!!!
•01. Filling the heating system ................................................. 7
•02. Venting the boiler .................................................................. 8
•03. Venting the heating system............................................... 8
•04. Filling the siphon with water............................................. 9
•05. Checking the power supply connection
• • 06. Setting the time and date (if required) - only for
weather-compensated control units.............................. 9
•07. Selecting the language (if required) - only for
weather-compensated control units.............................. 10
• • 08. Checking the gas type......................................................... 10
•09. Gas type conversion............................................................ 11
••• 10. Function sequence and possible faults ....................... 11
••• 11. Checking static and supply pressure ........................... 13
•12. Setting the maximum output ........................................... 14
••• 13. Checking all connections on the heating water
(primary) side and DHW (secondary) side for leaks
••• 14. Checking the burner (recording values on page
110 of the commissioning report)
•15. Checking the balanced flue system for soundness
(annular gap check) ............................................................. 15
• • 16. Burner removal ..................................................................... 16
• • 17. Checking the burner gasket and the burner gauze
assembly .................................................................................. 17
• • 18. Checking and adjusting the ignition and ionisation
electrodes ................................................................................ 18
• • 19. Cleaning the heating surfaces and installing the
burner........................................................................................ 18
Steps - commissioning, inspection and maintenance
5
Commissioning, inspection, maintenance
5692 580 GB
Commissioning steps
Inspection steps
Maintenance steps Page
!!!
• • 20. Checking the condensate drain and cleaning the
siphon........................................................................................ 20
• • 21. Checking the neutralising system (if installed)
• • 22. Checking the diaphragm expansion vessel and
system pressure.................................................................... 20
••• 23. Checking the function of all safety valves
••• 24. Checking the tightness of electrical connections
••• 25. Checking all gas equipment for soundness at
operating pressure .............................................................. 21
••• 26. Flue gas emissions test...................................................... 21
••• 27. Checking the ionisation current ..................................... 23
••• 28. Checking the external LPG safety valve (if
installed)
•29. Matching the control unit to the heating system ...... 24
•30. Adjusting the heating curves (only for weather-
compensated control units).............................................. 28
•31. Connecting the control unit to the LON system
(only for weather-compensated control units) .......... 31
•32. Instructing the system user .............................................. 33
•33. Scanning and resetting the "Maintenance" display 33
Steps - commissioning, inspection and . . . (cont.)
6
Commissioning, inspection, maintenance
5692 580 GB
Filling the heating system
!Please note
Unsuitable fill water increases the level of deposits and corrosion and
may lead to boiler damage.
&Thoroughly flush the entire heating system prior to filling it with water.
&Only use fill water of potable quality.
&Soften fill water with a hardness above 3.0 mol/m
3
, e.g. with a small
softening system for heating water (see the Viessmann Vitoset price-
list).
&An antifreeze additive suitable for heating systems can be mixed with
the fill water. The antifreeze manufacturer must verify its suitability.
1. Check the inlet pressure of the dia-
phragm expansion vessel.
2. Close the gas shut-off valve.
3. Fill the heating system at the boiler
fill & drain valve Ain the heating
return (on the connection set or on
site). (Minimum system pressure
> 0.8 bar).
Note
If the control unit has not been
switched ON prior to filling the sys-
tem, then the servomotor of the
diverter valve will still be in its cen-
tral position, and the system will be
completely filled.
4. If the control unit had already been
switched ON before filling began:
Switch ON the control unit and acti-
vate the filling program via coding
address "2F:2".
5. Close boiler fill & drain valve A.
6. Close the shut-off valves on the
heating water side.
Further details regarding the individual steps
7
Commissioning, inspection, maintenance
5692 580 GB
Venting the boiler
1. Close the shut-off valves on the
heating water side.
2. Connect the drain hose between
top valve Band a drain outlet.
3. Open valves Aand B, and vent
at mains pressure until no sound of
escaping air can be heard.
4. Close valves Aand Band open
the heating water shut-off valves.
Venting the heating system
1. Close the gas shut-off valve and
switch ON the control unit.
Further details regarding the individual steps (cont.)
8
Commissioning, inspection, maintenance
5692 580 GB
2. Activate the venting program via
coding address "2F:1" in code 1.
Note
To call up code 1 and for setting the
coding address, see page 35.
For function and sequence of the
venting program, see page 94.
Whilst the venting program runs,
the display shows "EL" (constant
temperature control unit) or
"Entlüftung" (venting) (weather-
compensated control unit).
3. Check the system pressure.
Filling the siphon with water
1. Remove the retaining clip and
siphon A.
2. Fill the siphon with water.
3. Fit siphon Aand secure with the
retaining clip.
Setting the time and date (if required) - only for weather-com-
pensated control units
Note
During commissioning, or after a prolonged time out of use, it may be necessary
to reset the time and date, if the time flashes in the display.
Press the following keys:
1. a/bfor the current time.
2. dto confirm; "Datum" (date)
is displayed.
3. a/bfor the current date.
Further details regarding the individual steps (cont.)
9
Commissioning, inspection, maintenance
5692 580 GB
4. dto confirm.
Selecting the language (if required) - only for weather-com-
pensated control units
Press the following keys:
1. c"Heizkreis wählen" (select
heating circuit) will be dis-
played.
2. dto confirm; wait approx. 4 s.
3. cpress again.
4. bfor the required language.
5. dto confirm.
Checking the gas type
Note
In the delivered condition, the Vitodens 200 is set up for natural gas E.
1. Check the gas category and
Wobbe index (Wo) with your mains
gas or LPG supplier and compare
them with the details on the burner
label.
2. If these details do not match, con-
vert the burner to the available gas
type.
Conversion kit installation
instructions
3. Adjust the gas type via coding
address "1E" at the control unit.
Note
To call up code 1 and for setting the
coding address, see page 35.
4. Record the gas type in the service
report on page 110.
Wobbe index ranges
Gas type Wobbe index range
kWh/m
3
MJ/m
3
Delivered condition
Natural gas E 12.0 to 16.1 43.2 to 58.0
After conversion
Natural gas LL 10.0 to 13.1 36.0 to 47.2
LPG P 20.3 to 21.3 72.9 to 76.8
Further details regarding the individual steps (cont.)
10
Commissioning, inspection, maintenance
5692 580 GB
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15
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