Viessmann VITODENS 333 Istruzioni operative

VIESMANN

Service instructions

for heating engineers

Vitodens 333

Type WS3A, 6.6 to 26.0 kW

Compact gas fired condensing boiler

natural gas and LPG version

See applicability on the last page

VITODENS 333

5692 548 GB 3/2004 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.

!Important information

This symbol warns against the

risk of material losses and

environmental pollution.

Note

Details identified by the words "Note"

contain additional information.

Warranty

All warranty rights are void if these

service instructions are not observed.

Target group

These service instructions are exclu-

sively designed for qualified person-

nel.

Work on gas equipment must only be

carried out by a registered gas fitter.

Electrical work must only be carried

out by a qualified electrician.

The system must be commissioned by

the system installer or a qualified per-

son authorised by the installer.

Regulations

Observe the following during service

work:

&all legal instructions regarding the

prevention of accidents,

&the TRGI, TRF and special regula-

tions, e.g. those of the BDH,

&all legal instructions regarding

environmental protection,

&the Code of Practice by relevant

trade associations and all local reg-

ulations.

If you notice a smell of gas

Danger

Escaping gas can cause explo-

sionswhichmayleadtoser-

ious injury.

&Do not smoke. Prevent

naked flames and sparks.

Never switch electrical lights

or equipment.

&Open windows and doors.

&Close the gas shut-off valve.

&Remove all personnel from

the danger zone.

&Observe the safety regula-

tions of your local gas sup-

plier which can be found on

the gas meter.

&Notify your heating contrac-

tor from outside the building.

Safety instructions

5692 548 GB

If you smell flue gas

Danger

Flue gas may lead to life-threa-

tening poisoning.

&Shut down the heating sys-

tem.

&Ventilate the boiler room.

&Closealldoorsleadingtothe

living space.

Repair work

It is not permitted to carry out repairs

on parts that fulfil a safety function.

Use only original Viessmann spare

parts, or equivalent parts that have

been approved by Viessmann.

Service work on the heating system

&Isolate the system from mains sup-

ply and check that is is no longer

'live', e.g. by removing a separate

fuse or by means of a mains electri-

cal isolator.

&Safeguard the system against

unauthorised reconnection.

&When using gas as fuel, also close

the main gas shut-off valve and

safeguard against unauthorised

reopening.

Ancillary components, spare and

wearing parts

!Important information

Components which are not

tested with the heating system,

the installation of non-

approved spare parts and

unauthorised conversion may

lead to damage to the heating

system, which may affect their

function and limit our warranty.

For conversions or replace-

ments, use only original parts

from Viessmann or those spare

parts which are approved by

Viessmann.

Safety instructions (cont.)

Safety instructions

5692 548 GB

Initial start-up, inspection, maintenance

Steps - initial start-up, inspection and maintenance ..................................... 5

Further details regarding the individual steps .............................................. 7

Coding

Code 1........................................................................................................ 39

Code 2........................................................................................................ 41

Resetting the coding to the as delivered condition ...................................... 61

Service scans

Service level summary................................................................................ 62

Temperatures, boiler coding card and brief scans ....................................... 63

Testing outputs (relay test).......................................................................... 67

Scanning operating conditions and sensors ................................................ 69

Troubleshooting

Call up fault history of fault codes................................................................ 72

Call up current fault codes .......................................................................... 72

Checking and acknowledging faults ............................................................ 74

Repairs ...................................................................................................... 84

Function description

Constant temperature control unit ............................................................... 95

Weather-compensated control unit.............................................................. 97

Internal extension H1.................................................................................. 99

Extensions for external connections (accessory)......................................... 100

Control functions ........................................................................................ 103

Designs

Connection and wiring diagrams –internal connections .............................. 108

Connection and wiring diagrams –external connections.............................. 110

Parts lists .................................................................................................. 112

Commissioning/service reports............................................................... 120

Specification............................................................................................. 126

Certificates

Declaration of conformity ............................................................................ 127

Manufacturer's certificate according to the 1st BImSchV [Germany]............. 128

Keyword index .......................................................................................... 129

Index

5692 548 GB

For further instructions on individual steps, see pages indicated

Commissioning steps

Inspection steps

Maintenance steps Page

!!!



•1. Filling the heating system ................................................. 7

•2. Venting the boiler.................................................................. 8

•3. Venting the heating system............................................... 8

•4. Filling the siphon with water............................................. 9

•5. Checking the electrical mains connection

•6. Language selection (if required) - only for the

weather-compensated control units.............................. 9

••• 7. Pivot the control unit down to carry out

commissioning and maintenance work........................ 10

••• 8. Function sequence and possible faults ....................... 10

••9. Checking the gas type......................................................... 12

•10. Changing the gas type (see separate installation

instructions)

••• 11. Checking static and supply pressure ........................... 13

••• 12. Checking the CO2settings ................................................ 15

•13. Setting the max. output ...................................................... 17

••• 14. Check all connections on the primary and DHW

side for leaks

••• 15. Checking the burner (recording values on page

120 of the commissioning report)

•16. Checking the balanced flue system for soundness

(annular gap check) ............................................................. 18

•• 17. Removing the burner and checking the burner

gasket (replace gasket every two years)...................... 19

•• 18. Checking the burner gauze assembly........................... 20

•• 19. Checking and adjusting the ignition and ionisation

electrodes ................................................................................ 21

Steps - initial start-up, inspection and maintenance

Initial start-up, inspection, maintenance

5692 548 GB

Commissioning steps

Inspection steps

Maintenance steps Page

!!!



•• 20. Cleaning the combustion chamber/Cleaning the

heating surfaces and installing the burner ................. 22

•• 21. Checking the condensate drain and cleaning the

siphon........................................................................................ 23

•• 22. Checking the neutralising system (if installed)

•23. Testing anode earth current with an anode test

device ........................................................................................ 23

•24. Cleaning the DHW cylinder ............................................... 24

•25. Checking and replacing the magnesium anode (if

required)................................................................................... 25

•26. Taking the DHW cylinder back into use ........................ 25

••• 27. Checking the diaphragm expansion vessel and

system pressure

••• 28. Checking the function of all safety valves

••• 29. Checking tightness of electrical connections

••• 30. Checking all gas equipment for soundness at

operating pressure............................................................... 26

••• 31. Checking the ionisation current...................................... 26

••• 32. Checking the external LPG safety valve (if

installed)

•33. Matching the control unit to the heating system ...... 27

•34. Connecting the control unit to the LON system

(only for weather-compensated control units) .......... 32

•35. Implementing a user check (in conjunction with

the LON system) .................................................................... 33

•36. Adjusting heating curves (only for weather-

compensated control units).............................................. 34

•37. Instructing the system user .............................................. 37

•38. Scanning and resetting the maintenance display .... 37

Steps - initial start-up, inspection and maintenanc . . . (cont.)

Initial start-up, inspection, maintenance

5692 548 GB

Filling the heating system

1. Check the charge pressure of the

diaphragm expansion vessel.

2. Close the gas shut-off valve.

!Important information

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 with water.

&Only use fill water of pota-

ble quality.

&Soften fill water harder

than 20 cdH (3.58 mmol/l).

For suitable means of

water softening, see the

Vitoset pricelist.

&An anti-freeze additive

suitable for heating sys-

temscanbemixedwith

the fill water.

Fill the heating system at the fill

valve in the heating return (on the

connection set or on site).

(minimum system pressure >

0.8 bar).

Note

The diverter valve actuator will be

in the central position, and the sys-

tem will be completely filled, if the

control unit has not been switched

ON before the system was filled.

4. If the control unit had already been

switched ON before filling began:

Start the control unit and in code 1,

set coding address 2F:2.

The diverter valve will then be in its

central position.

Note

To call up code 1 and for setting the

coding address, see page 39.

Whilst filling is in progress, the dis-

play shows bF (constant tempera-

ture control unit) or Filling

(weather-compensated control

unit).

Continue filling the system.

5. Close the boiler fill & drain valve.

6. Set coding address 2F:0.

Further details regarding the individual steps

Initial start-up, inspection, maintenance

5692 548 GB

Venting the boiler

1. Close the shut-off valves on the

heating water side.

2. Connect the drain hose on valve A

with a drain outlet.

3. Open valve Aandfillvalveinthe

heating return, and vent at mains

pressure, until no sound of escap-

ingaircanbeheardanymore.

4. Close valve Aand fill valve in the

heating return, and open the pri-

mary shut-off valves.

Venting the heating system

1. Close the gas shut-off valve and

start the control unit.

2. Activate the venting program via

coding address 2F:1.

Note

To call up code 1 and for setting the

coding address, see page 39.

For function and sequence of the

venting program, see page 104.

Whilst venting is in progress, the

display shows EL (constant tem-

perature control unit) or Venting

(weather-compensated control

unit).

3. Check the system pressure.

Further details regarding the individual steps (cont.)

Initial start-up, inspection, maintenance

5692 548 GB

Filling the siphon with water

1. Remove the retaining clip and

siphon A.

2. Fillthesiphonwithwater.

3. Fit siphon Aandsecurewiththe

retaining clip.

Language selection (if required) - only for the weather-com-

pensated control units

1. Press c.

2. Select the required language with

3. Confirm with d.

Further details regarding the individual steps (cont.)

Initial start-up, inspection, maintenance

5692 548 GB

Pivot the control unit down to carry out commissioning and

maintenance work

1. Open flap A.

2. Release the side closures Band

pivot control unit Cforward.

3. Release the side screws and pivot

control unit Cdown with its retain-

ing frame D.

Function sequence and possible faults

For further details regarding faults, see page 74.

Display screen Remedy

Control unit

issues a heat

demand

No Set value

Further details regarding the individual steps (cont.)

Initial start-up, inspection, maintenance

5692 548 GB

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