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Please follow these safety instructions closely toprevent accidents and material losses.
Safety instructions explained
DangerThis symbol warns against the risk of injury.
! Please noteThis symbol warns against the risk of materiallosses and environmental pollution.
NoteDetails identified by the word "Note" contain additionalinformation.
Target group
These instructions are exclusively intended for quali-fied contractors. Work on gas installations must only be carried out by
a registered gas fitter. 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 theinstaller.
Regulations to be observed
National installation regulations Statutory regulations for the prevention of accidents Statutory regulations for environmental protection Codes of practice of the relevant trade associations All current safety regulations as defined by DIN, EN,
DVGW, TRGI, TRF, VDE and all locally applicablestandardsa NORM, EN, VGW-TR Gas, VGW-TRF and
VEc SEV, SUVA, SVGW, SVTI, SWKI, VKF and
EKAS guideline 1942: LPG, part 2
Safety instructions for working on the system
Working on the system
Where gas is used as the fuel, close the main gasshut-off valve and safeguard it against unintentionalreopening.
Isolate the system from the power supply, e.g. byremoving the separate fuse or by means of a mainsisolator, and check that it is no longer 'live'.
Safeguard the system against reconnection.
DangerHot surfaces can cause burns. Before maintenance and service work, switch
OFF the appliance and let it cool down. Never touch hot surfaces on the boiler, burner,
flue system or pipework.
! Please noteElectronic assemblies can be damaged by elec-trostatic discharge.Prior to commencing work, touch earthedobjects such as heating or water pipes to dis-charge static loads.
Repair work
! Please noteRepairing components that fulfil a safety func-tion can compromise the safe operation of thesystem.Replace faulty components only with genuineViessmann spare parts.
Auxiliary components, spare and wearing parts
! Please noteSpare and wearing parts that have not been tes-ted together with the system can compromise itsfunction. Installing non-authorised componentsand making non-approved modifications or con-versions can compromise safety and may inva-lidate our warranty.For replacements, use only original spare partssupplied or approved by Viessmann.
Safety instructions for operating the system
If you smell gas
DangerEscaping gas can lead to explosions which mayresult in serious injury. Do not 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. Evacuate any people from the danger zone. Notify your gas or electricity supply utility from
outside the building. Have the power supply to the building shut off
from a safe place (outside the building).
If you smell flue gas
DangerFlue gas can lead to life threatening poisoning. Shut down the heating system. Ventilate the installation site. Close doors to living spaces to prevent flue
gases from spreading.
Safety instructions
Safety instructions
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What to do if water escapes from the appliance
DangerWhen water escapes from the appliance there isa risk of electrocution.Switch off the heating system at the external iso-lator (e.g. fuse box, domestic power distribu-tion).
Flue systems and combustion air
Ensure that flue systems are clear and cannot besealed, for instance due to accumulation of conden-sate or other causes. Ensure an adequate supply ofcombustion air.Instruct system users that subsequent modifications tothe building characteristics are not permissible (e.g.cable/pipework routing, cladding or partitions).
DangerLeaking or blocked flue systems, or an inade-quate supply of combustion air can cause lifethreatening poisoning from carbon monoxide inthe flue gas.Ensure the flue system is in good working order.Vents for supplying combustion air must be non-closable.
Extractors
Operating appliances that extract air to the outside(cooker hoods, extractors, air conditioning units, etc.)can create negative pressure. If the boiler is operatedat the same time, this can lead to reverse flow of theflue gas.
DangerThe simultaneous operation of the boiler andappliances that extract air to the outside canresult in life threatening poisoning due toreverse flow of the flue gas.Fit an interlock circuit or take suitable steps toensure an adequate supply of combustion air.
Safety instructions
Safety instructions (cont.)57
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1. Information Disposal of packaging ............................................................................ 6Symbols ................................................................................................. 6Intended use .......................................................................................... 7Product information ................................................................................ 7 Vitodens 222-F, type B2TB ................................................................. 7
2. Preparing for installation Preparing for boiler installation .............................................................. 8 Safety assembly to DIN 1988 and EN 806 on the cold water connec-
tion ...................................................................................................... 10
3. Installing the boiler Removing the front panels ..................................................................... 11Siting and levelling the boiler ................................................................. 12Connections on the heating water and DHW side ................................. 13 Connection on the DHW side ............................................................. 13Condensate connection ......................................................................... 13Flue gas connection ............................................................................... 14Gas connection ...................................................................................... 15Opening the control unit enclosure ........................................................ 16Electrical connections ............................................................................ 16 External demand via switching contact .............................................. 18 External demand via 0 10 V input .................................................... 18 External blocking via switching contact .............................................. 19 Power supply for accessories at plug lH (230 V ~) ............................ 19 Power supply f ................................................................................. 20 Routing connecting cables ................................................................. 21Closing the control unit enclosure .......................................................... 22Fitting the front panels ........................................................................... 23
4. Commissioning, inspec-tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 24
5. Code 1 Calling up coding level 1 ........................................................................ 45"General"/Group 1 ................................................................................ 45 Coding ................................................................................................ 45"Boiler"/Group 2 ................................................................................... 46 Coding ................................................................................................ 46"DHW"/Group 3 ..................................................................................... 47 Coding ................................................................................................ 47"Heating circuit ..."/Group 5 ................................................................ 47 Coding ................................................................................................ 47
6. Code 2 Calling up coding level 2 ........................................................................ 49"General"/Group 1 ................................................................................ 49 Coding ................................................................................................ 49"Boiler"/Group 2 ................................................................................... 53 Coding ................................................................................................ 53"DHW"/Group 3 ..................................................................................... 54 Coding ................................................................................................ 54"Heating circuit ..."/Group 5 ................................................................ 55 Coding ................................................................................................ 55
7. Diagnosis and servicescans
Service menu ......................................................................................... 58 Calling up the
