Viessmann Vitodens 222-F Operating instructions

for use by heating contractor
Please file in Service Binder
5461 890 - 09 04/2016
Service Instructions
VITODENS
r
222-F
Vitodens 222-F, B2TB Series
Models 19 and 35
Floor mounted, gas-fired condensing storage combi boiler
For operation with natural gas and liquid propane gas
Heating input: 12 to 125 MBH
3.5 to 37 kW
Read and save these instructions
for future reference.
Product may not be exactly as shown
IMPORTANT
H

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
2
Safety
2
Safety, Installation and Warranty Requirements
Please ensure that these instructions are read and understood before commencing installation. Failure to comply with
the instructions listed below and details printed in this manual can cause product/property damage, severe personal
injury, and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information
found in manual subsections).
WARNING
Installers must follow local regulations with respect to
installation of carbon monoxide detectors. Follow the
Viessmann maintenance schedule of the boiler contained
in this manual.
Product documentation
Read all applicable documentation before commencing
installation. Store documentation near boiler in a
readily accessible location for reference in the future
by service personnel.
For a listing of applicable literature,
please see section entitled “Important
Regulatory and Installation Requirements”.
Warranty
Information contained in this and
related product documentation must
be read and followed. Failure to do
so renders the warranty null and void.
Licensed professional heating contractor
The installation, adjustment, service and maintenance
of this equipment must be performed by a licensed
professional heating contractor.
Please see section entitled
“Important Regulatory and Installation
Requirements”.
Contaminated air
Air contaminated by chemicals can cause by-products
in the combustion process, which are poisonous to
inhabitants and destructive to
Viessmann equipment.
For a listing of chemicals which
cannot be stored in or near the
boiler room, please see subsection
entitled “Mechanical room” in the
“Installation Instructions”.
Advice to owner
Once the installation work is complete, the heating
contractor must familiarize the system operator/
ultimate owner with all equipment, as well as safety
precautions/requirements, shutdown procedure, and
the need for professional service annually before the
heating season begins.
Carbon monoxide
Improper installation, adjustment, service and/or
maintenance can cause flue products to flow into
living space. Flue products contain poisonous carbon
monoxide gas.
For information pertaining to the
proper installation, adjustment, service
and maintenance of this equipment to
avoid formation of carbon monoxide,
please see subsection entitled
“Mechanical room” and “Venting requirements”
in the “Venting System Installation Instructions”.
Fresh air
This equipment requires fresh air for
safe operation and must be installed
ensuring provisions for adequate
combustion and ventilation air exist.
For information pertaining to the
fresh air requirements of this product,
please see subsection entitled
“Mechanical room” in the “Installation
Instructions”.
Equipment venting
Never operate boiler without an installed venting
system. An improper venting system can cause
carbon monoxide poisoning.
For information pertaining to
venting and chimney requirements,
please see section entitled “Venting
Connection”. All products of
combustion must be safely vented
to the outdoors.
Operating and Service Documentation
It is recommended that all product documentation such
as parts lists, operating and service instructions be handed
over to the system user for storage. Documentation is to
be stored near boiler in a readily accessible location for
reference by service personnel.
WARNING
This boiler requires fresh air for safe operation and must
be installed with provisions for adequate combustion
and ventilation air (in accordance with local codes and
regulations of authorities having jurisdiction).
Do not operate this boiler in areas with contaminated
combustion air. High levels of contaminants such as
dust, lint or chemicals can be found at construction
sites, home renovations, in garages, workshops, in dry
cleaning/laundry facilities, near swimming pools and in
manufacturing facilities.
Contaminated combustion air will damage the boiler
and may lead to substantial property damage, severe
personal injury and/or loss of life. Ensure boiler/burner is
inspected and serviced by a qualified heating contractor
at least once a year in accordance with the Service
Instructions of the boiler.

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5461 890 - 09
Vitodens 222-F B2TB 19 and 35 Service
About these Service Instructions

Take note of all symbols and notations intended to draw attention to potential hazards or important product
information. These include “WARNING”, “CAUTION”, and “IMPORTANT”. See below.
IMPORTANT
Warnings draw your attention to the presence of
potential hazards or important product information.
Cautions draw your attention to the presence of
potential hazards or important product information.
Helpful hints for installation, operation or maintenance
which pertain to the product.
This symbol indicates that additional, pertinent
information is to be found.
This symbol indicates that other instructions must
be referenced.
WARNING
Indicates an imminently hazardous situation which,
if not avoided, could result in loss of life, serious injury
or substantial product/property damage.
CAUTION
Indicates an imminently hazardous situation which,
if not avoided, may result in minor injury or product/
property damage.
Safety, Installation and Warranty Requirements (continued)
WARNING
Inhaling of fiberglass wool and/or ceramic fiber
materials is a possible cancer hazard. These materials
can also cause respiratory, skin and eye irritation.
Fiberglass wool and ceramic fiber materials
WARNING
Appliance materials of construction, products of
combustion and the fuel contain alumina, silica, heavy
metals, carbon monoxide, nitrogen oxides, aldehydes
and/or other toxic or harmful substances which can
cause serious injury or loss of life and which are
known to the State of California to cause cancer,
birth defects and other reproductive harm. Always
use proper safety clothing, respirators and equipment
when servicing or working nearby the appliance.
The state of California has listed the airborne fibers of
these materials as a possible cancer hazard through
inhalation. When handling these materials, special care
must be applied.
First aid measures
- If eye contact occurs, flush eyes with water to remove
dust. If symptoms persist, seek medical attention.
- If skin contact occurs, wash affected areas gently
with soap and warm water after handling.
Suppliers of fiberglass wool products recommend the
following precautions be taken when handling these
materials:
- Avoid breathing fiberglass dust and contact with
skin and eyes.
- Use NIOSH approved dust/mist respirator.
- Wear long-sleeved, loose fitting clothing, gloves
and eye protection.
- Wash work clothes separately from other clothing.
Rinse washer thoroughly.
- Operations such as sawing, blowing, tear-out and
spraying may generate airborne fiber concentration
requiring additional protection.
Suppliers of ceramic fiber products recommend the
following first aid measures:
- Respiratory tract (nose and throat) irritation:
If respiratory tract irritation develops, move the person
to a dust free location.
-Eye irritation: If eyes become irritated, flush immediately
with large amounts of lukewarm water for at least 15
minutes. Eyelids should be held away from the eyeball
to ensure thorough rinsing. Do not rub eyes.
- Skin irritation: If skin becomes irritated, remove soiled
clothing. Do not rub or scratch exposed skin. Wash area
of contact thoroughly with soap and water. Using
a skin cream or lotion after washing may be helpful.
- Gastrointestinal irritation: If gastrointestinal tract
irritation develops, move the person to a dust free
environment.
Safety

Table of Contents
4
Page
Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
Safety
General Information
Start-up
Service
Safety, Installation and Warranty Requirements..............2
Product documentation..........................................2
Warranty..............................................................2
Licensed professional heating contractor..................2
Contaminated air...................................................2
Advice to owner....................................................2
Operating and Service Documentation......................2
Carbon monoxide...................................................2
Fresh air..............................................................2
Equipment venting.................................................2
Fiberglass wool and ceramic fiber materials..............3
First aid measures..................................................3
About the Service Instructions......................................3
Necessary Tools.........................................................6
Important Regulatory and Installation Requirements........6
Codes..................................................................6
Technical literature................................................6
Initial start-up.......................................................6
Working on the equipment.....................................6
Instructing the system user....................................6
Applicability..............................................................8
Product Information....................................................8
Mechanical Room......................................................9
Overview.................................................................10
Removing the Front Panels.........................................11
Accessing the User Interface Programming Unit............11
Select Language.......................................................12
Set Time and Date....................................................12
Filling Siphon With Water...........................................12
Filling the Heating System..........................................13
Bleed (Vent) Air from Boiler Heat Exchanger.................14
Bleed (Vent) Air from Heating System.........................14
Check Power Supply Connection.................................15
Designating Heating Circuits.......................................15
Select Gas Type.......................................................15
Convert Fuel Type to Liquid Propane Gas.....................16
Setting Altitude Parameters........................................16
Checking the Static and Supply Pressure.....................17
Sequence of Operation and Potential Faults During
Each Start-up Cycle...................................................18
Set Maximum Output................................................19
Check All Primary and Secondary Circuit
Connections for Leaks...............................................19
Perform Combustion Analysis.....................................19
Checking the Balanced Flue System Tightness
(Annular Gap Check).................................................20
Remove Burner Assembly...........................................20
Checking the Burner Flue Gas Flapper..........................21
Checking the Burner Gasket and Burner Gauze
Assembly................................................................21
Check and Adjust Ignition and Ionization Electrodes......21
Cleaning the Heat Exchanger and Fitting the Burner......22

Table of Contents
5
Page
Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
Service (continued)
Outdoor Reset Programming Unit
Coding 1
Coding 2
Diagnosis and Service Scans
Troubleshooting
Function Description
Parts
Additional Information
Checking the Condensate Drain and Cleaning
the Siphon...............................................................23
Check Neutralization Unit.(if applicable).......................23
Draining the Boiler on the DHW Side...........................24
Cleaning the DHW Storage Tank................................24
Checking the Diaphragm Expansion Vessel and
System Pressure.......................................................25
Check Functioning of Safety Valves............................25
Check Electrical Connections......................................26
Check Gas Pipes and Fittings for Leaks.......................26
Clock Natural Gas Meter............................................27
Check CO2Setting...................................................28
Start-up and Shutdown..............................................29
Menu........................................................……..……29
Combustion Management System...............................31
Functional Description...............................................32
Installation Examples.................................................33
System version 1......................................................33
System version 2......................................................34
System version 3......................................................35
System version 4......................................................36
System version 5......................................................37
Heating Curve Adjustment.........................................38
Connecting the Boiler Control to a LON System............40
General...................................................................42
Boiler......................................................................44
DHW......................................................................44
Heating Circuit 1, 2 and 3.........................................45
General ..................................................................49
Boiler......................................................................56
DHW......................................................................57
Heating Circuit 1, 2 and 3.........................................59
Calling up the Service Level.......................................65
Diagnosis................................................................66
Checking Outputs (relay tests)...................................68
Fault Codes..............................................................69
Corrective Action......................................................77
External Extensions AM1...........................................85
Internal Extensions EA1............................................86
Internal Extensions (Accessories)................................87
Control Functions.....................................................88
Wiring Diagram........................................................90
Burner Program Sequence of Operation.......................92
Parts Lists....................................................…………93
Installation fittings........................……..............……101
Technical Data..........................................…….……102
Maintenance Record................................................104
Lighting and Operating Instructions...........................105

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
6
Necessary Tools
Testing/analysis equipment (Use only calibrated equipment)
HMultimeter to measure 0 - 230V, 0 - 12A AC and
0-100 mA DC
HFlue gas analyzer to measure % CO2or O2(i.e.
Bacharach fluid samplers or suitable electronic analyzer)
HManometer to measure gas pressure 0 to 11 "w.c.
(accurately) and up to 28 "w.c. gas pressure (or a non-
electric Magnehelic® manometer may also be utilized)
HStack thermometer 0 to 500°F (0 to 260°C)
HBacharach calculator or suitable tables to calculate
efficiency
HCarbon monoxide measuring equipment 0 to 400 ppm
Cleaning supplies
HPlastic hand brush
HRags
Special items
HApproved leak detection fluid for natural gas and
liquid propane gas
HPipe joint sealant
General Information
Important Regulatory and Installation Requirements
Codes
The installation of this unit shall be in accordance with
local codes or, in the absence of local codes, use CAN/
CSA-B149.1 or .2 Installation Codes for Gas Burning
Appliances for Canada. For U.S. installations use the
National Fuel Gas Code ANSI Z223.1. Always use latest
editions of codes.
In Canada all electrical wiring is to be done in accordance
with the latest edition of CSA C22.1 Part 1 and/or local
codes. In the U.S. use the National Electrical Code ANSI/
NFPA 70. The heating contractor must also comply with
both the Standard for Controls and Safety Devices for
Automatically Fired Boilers, ANSI/ASME CSD-1, and
the Installation Code for Hydronic Heating Systems,
CSA B214-01, where required by the authority having
jurisdiction.
Technical literature
Literature for the Vitodens boiler:
- Technical Data Manual
- Installation Instructions
- Service Instructions
- Operating Instructions and User’s Information Manual
- Instructions of other Viessmann products utilized and
installed
- Installation codes mentioned in this manual
Leave all literature at the installation site and advise the
system operator/ultimate owner where the literature can
be found. Contact Viessmann for additional copies.
This product comes with several safety instruction labels
attached. Do not remove! Contact Viessmann immediately
if replacement labels are required.
Initial start-up
Initial start-up must be performed by a qualified heating
contractor. Proper completion of the Maintenance
Record by the heating contractor is also required. The
Maintenance Record is located in the Service Instructions.
Working on the equipment
The installation, adjustment, service, and maintenance
of this boiler must be done by a licensed professional
heating contractor who is qualified and experienced in
the installation, service, and maintenance of hot water
boilers. There are no user serviceable parts on the boiler,
burners, or control.
Please carefully read this manual prior to attempting
start-up, maintenance or service. Any warranty is null
and void if these instructions are not followed.
For information regarding other Viessmann System
Technology componentry, please reference
documentation of the respective product.
We offer frequent installation and service seminars to
familiarize our partners with our products. Please inquire.
Ensure main power supply to equipment, the heating
system, and all external controls has been deactivated.
Close main gas supply valve. Take precautions in all
instances to avoid accidental activation of power during
service work.
The completeness and functionality of field supplied
electrical controls and components must be verified by
the heating contractor. These include low water
cut-offs, flow switches (if used), staging controls,
pumps, motorized valves, air vents, thermostats, etc.
Instructing the system user
The installer of the system is responsible to ensure the
system operator/ultimate owner is made familiar with the
system functioning, its activation, and its shut-down.
The following topics must be covered:
- Proper system operation sequence.
- Explain the equipment.
- Demonstrate an emergency shut-down, what to do
and what not.
- Explain that there is no substitute for proper
maintenance to help ensure safe operation.

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Vitodens 222-F B2TB 19 and 35 Service General Information
Important Regulatory and Installation Requirements (continued)
For installations on the Commonwealth of Massachusetts, the following modifications to NFPA-54 chapter 10 apply:
Excerpt from 248 CMR 5-08:
2(a) For all side-wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in
whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side-
wall exhaust vent termination is less than (7) feet above finished grade in the area of the venting, including but not limited
to decks and porches, the following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side-wall horizontal vented gas
fueled equipment, the installing plumber or gas fitter shall observe that a hard wired carbon monoxide detector with an
alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the
installing plumber or gas fitter shall observe that a battery operated or hard wired carbon monoxide detector with an
alarm is installed on each additional level of the dwelling, building or structure served by the side-wall horizontal vented
gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed
professional for the installation of hard-wired carbon monoxide detectors.
a. In the event that the side-wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the
hard-wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the
owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during
said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with
the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a
minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented
gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size,
“GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.
4. INSPECTION. The state or local gas inspector of the side-wall horizontally vented gas fueled equipment shall not
approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage
installed in accordance with the provisions of 248 CMR 5.08(2)(a) 1 through 4.
(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a) 1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edition
of NFPA 54 as adopted by the Board; and
2. Product Approved side-wall horizontally vented gas fueled equipment installed in a room or structure separate
from the dwelling, building or structure used in whole or in part for residential purposes.
CSD-1 Field Testing of High Limit Switches for Vitodens boilers – where required by law.
VIESSMANN IS NOT RESPONSIBLE FOR ANY DAMAGES THAT THE FOLLOWING TEST PROCEDURE MAY RESULT
IN BY OVERHEATING THE SYSTEM.
The Vitodens 200/222 boilers are equipped with flow switches or sensors that when activated enable the burner to operate.
The fixed high limit, when tripped, produces a fault that will require manual reset of the boiler control.
Fixed High Limit fault simulation #1:
- Close the boiler valve and jumper across the flow switch.
- Run the boiler at high fire and it will shut down by the coding card (in B2TB models, set coding address 06 to
maximum) but should continue to steady increase the boiler temperature until the fixed high limit is tripped.
- Once the fixed high limit is tripped, slowly open the boiler valve to safely cool the boiler down.
Fixed High Limit fault simulation #2:
- Throttle the boiler valve to a point where the burner will run with as little flow as possible.
- Run the boiler to high fire via relays test.
- When the burner shuts down on the electronic limit, close the ball valve to stop the flow.
- The boiler temperature should continue a steady increase to trip the fixed high limit.
- Once the fixed high limit is tripped, slowly open the boiler valve to safely cool the boiler down.
Fixed High Limit fault simulation #3:
- Remove one of the wires connected to limit switch, this will produce a fault in the boilers control that requires
manual reset.
Flow Switch Procedure:
The Vitodens 222 B2TB series boilers are equipped with a flow sensing device. Upon detection of an inadequate flow rate,
the switch will open and the burner will shut down and will prevent restart until an adequate flow rate is restored. To test the
sensing device, throttle down the flow of water to or from the boiler. The boiler will shut down once the flow has dropped
below it’s safe operating set point.

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
8
General Information
Applicability
When ordering replacement parts, provide either the
16-digit boiler serial number (on the bar code label) or
the 12-digit ASME/NB serial number, located as shown
underneath boiler front enclosure panel. Refer to page 11
for instructions on how to remove front enclosure panel.
Model No. B2TB 19
Serial No. 7542250 jjjjjjjjj
Model No. B2TB 35
Serial No. 7542251 jjjjjjjjj
Product Information
CAUTION
The boiler serial number must be provided when
ordering replacement parts. Some replacement parts
are not reverse compatible with previous versions of
the Vitodens 222-F B2TB boiler.
IMPORTANT
Natural gas and liquid propane gas-fired condensing
heating boiler for weather-responsive operation in closed
loop, forced circulation hot water heating systems for
space heating and domestic hot water (DHW) production.
The Vitodens 222-F, B2TB series boiler comes factory
set for operation with natural gas. For a fuel conversion
to liquid propane gas no conversion kit is required (see
page 16).
The integral primary storage tank 26.5 USG (100 L)
capacity offers the convenience of a separate DHW tank
with approximately twice that volume.
Boiler model must be selected based on an accurate heat
loss calculation of the building. Ensure boiler model is
compatible with connected radiation.
Follow the Vitodens Venting System
Installation Instructions to vent this boiler.
Vitodens 222-F, B2TB series boilers are factory-tested
and calibrated. Further gas valve adjustments are not
typically required during field start-up.
AStainless steel Inox-Radial heat exchanger for high
operational reliability, a long service life and high
heating output in the smallest spaces
BModulating MatriX cylinder gas burner for extremely
clean combustion and quiet operation.
CIntegral diaphragm expansion vessel
DGraphical user interface
EIntegral, 3-speed high efficiency circulation pump
FStainless steel DHW primary storage tank.

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5461 890 - 09
Vitodens 222-F B2TB 19 and 35 Service General Information
Mechanical Room
During the early stages of designing a new home, we recommend that proper consideration be given to constructing a
separate mechanical room dedicated to the gas- or oil-fired heating equipment and domestic hot water storage tank(s).
The boiler must be located in a heated indoor area, near a floor drain, and as close as possible to a wall. Whenever
possible, install the boiler near an outside wall so that it is easy to duct the venting system to the boiler.
Locate the boiler on a wall capable of supporting the weight of the boiler filled with water (see section entitled
“Technical Data” on page 101 for information required for total boiler weight calculation). Ensure that the boiler
location does not interfere with the proper circulation of combustion and ventilation air of other fuel burning equipment
within the mechanical room (if applicable).
The maximum room temperature of the mechanical room where the boiler is located must not exceed 104ºF (40ºC).
HEnsure ambient temperatures are higher than 32°F
(0°C) and lower than 104°F (40°C).
HPrevent the air from becoming contaminated by
halogenated hydrocarbons (e.g. as contained in paint
solvents or cleaning fluids) and excessive dust (e.g.
through grinding or polishing work). Combustion air
for the heating process, and ventilation of the boiler
room must be free of corrosive contaminants. To that
end, any boiler must be installed in an area that has no
chemical exposure. The list to the right indicates the
main, currently known sources.
HAvoid continuously high levels of humidity (e.g. through
frequent drying of laundry).
HNever close existing ventilation openings.
WARNING
If you notice fire coming from the appliance, call the fire
department immediately! Do not attempt to extinguish
the fire unless qualified to do so.
WARNING
Incorrect ambient conditions can lead to damage to
the heating system and put safe operation at risk.
WARNING
Fire causes a risk of burns and explosion!
HShut down the boiler
HClose fuel shut-off valves
HUse a tested fire extinguisher, class ABC.
IMPORTANT
The service life of the boiler’s exposed metallic surfaces,
such as the casing and fan housing, is directly influenced
by proximity to damp and salty marine environments. In
such areas, higher concentration levels of chlorides from
sea spray, coupled with relative humidity, can lead to
degradation of the exposed metallic surfaces mentioned
above. Therefore, it is imperative that boilers installed
in such environments not be installed using direct vent
systems which draw outdoor air for combustion. Such
boilers must be installed using room air dependent vent
systems; i.e. using room air for combustion. The indoor
air will have a much lower relative humidity and, hence,
potential corrosion will be minimized.
Installation area conditions Sources of combustion and ventilation air contaminants
Areas likely to contain contaminants:
HNew building construction
HSwimming pools
HRemodelling areas, hobby rooms
HGarages with workshops
HFurniture refinishing areas
HDry cleaning/laundry areas and establishments
HAuto body shops
HRefrigeration repair shops
HMetal fabrication plants
HPlastic manufacturing plants
HPhoto processing plants
HBeauty salons
Products containing contaminants:
HChlorine-type bleaches, detergents and cleaning
solvents found in household laundry rooms
HPaint and varnish removers
HHydrochloric acid, muriatic acid
HChlorine-based swimming pool chemicals
HSpray cans containing chlorofluorocarbons
HChlorinated waxes and cleaners
HCements and glues
HRefrigerant leaks
HCalcium chloride used for thawing
HSodium chloride used for water softening salt
HPermanent wave solutions
HAdhesives used to fasten building products and other
similar items
HAntistatic fabric softeners used in clothes dryers
Boiler operation in marine environments (damp, salty
coastal areas)

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
10
General Information
Overview
Legend
AExpansion tank
BBoiler PRV
CASME rating plate
DDrain pipe for boiler PRV
EMixer damper
FBoiler control
GHO1B Control unit (graphical user interface)
HCondensate siphon
IExternal accessories connection box
JDHW storage tank
KFlue adaptor
LOptional air intake
MASME certified heat exchanger
NMatrix burner
OAir Venturi
PDHW pump
Q3 speed boiler pump
RTPR valve
SDrain pipe for TPR valve
TDHW drain valve

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5461 890 - 09
Vitodens 222-F B2TB 19 and 35 Service
Removing the Front Panels
Some of the following service steps require the removal
of the front enclosure panel. To avoid personal injury
and/or product damage of any kind please follow the
instructions below carefully when removing the front
enclosure panel.
IMPORTANT
Close the main gas supply line.
Start-up
1. Remove the front upper panel.
2. Tilt and remove the lower front panel.
3. Remove the retaining screw and set aside.
4. Remove the lower front panel.
Accessing the User Interface Programming Unit
1. Turn up both locks to unlock the user interface
programming unit covers.
2. Slide open the user interface programming unit
covers.
3. Turn on the boiler by pressing the ON/OFF switch.

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
12
Start-up
Set Time and Date
Select Language
Setting the time and date
During commissioning.
1. Using the set the current time
2. Accept by pressing OK, this will move to date
3. Using the set the current date
4. Press OK to complete
To change the time/date after prolonged time out of use.
Extended menu:
1.
2. “Settings”
3. “Time / Date”
4. Set current time and date (as shown above).
Filling Siphon With Water
1. Pivot control unit forward.
2. Pull retaining clip Aoff.
3. Pull filler pipe Bupwards.
4. Pull off trap Cdownwards.
5. Fill siphon with water and reassemble.
6. Check that the condensate pipe is connected
correctly to the siphon and heat exchanger.
7. Refit cover panel.
8. Secure control unit back in operating position.
At the commissioning stage, the display is in German.
1. “Sprache” (Language) Deutsch DE (German)
2. Select the required language with
3. Accept by pressing OK.
To change the language
Extended menu:
1.
2. “Settings”
3. “Language”
4. Select the required language with
5. Accept by pressing OK.

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Vitodens 222-F B2TB 19 and 35 Service
Filling the Heating System
1. Check the pre-charge pressure of the diaphragm
expansion vessel.
2. Close the gas shut-off valve.
3. Fill heating system via boiler drain & fill valve A
in the heating return (at the connection set on the
side or above the boiler). Minimum system pressure
> 14 psi.
Note: If the control unit has not been switched on
prior to filling the system, then the servomotor
of the diverter valve will still be in its central
position, and the system will be completely
filled.
Note: Lever on valve Bmust be in the “left”
position.
4. If the control unit had already been switched on
before filling began: Switch control unit ON and
activate filling program (see next steps).
5. Close boiler drain C& open fill valve A.
Activating filling (bleeding) program:
1. Press OK and simultaneously for approximately
4 seconds.
2. “Service functions”
3. “Filling”
4. Ending filling function: Press OK or .
Start-up
CAUTION
Unsuitable fill water increases the level of deposits and
corrosion, and may lead to damage to the equipment.
HThoroughly flush the entire heating system prior to
filling with water.
HOnly use water of potable quality.
HThe water will have to be softened if it is harder than
17.5 grains / 300 ppm total dissolved solids.
HInhibitors or antifreeze additives suitable for heating
systems may be added manually.

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
14
Start-up
Bleed (Vent) Air from Boiler Heat Exchanger
Note: To prevent equipment damage, do not bleed the
boiler heat exchanger via the pressure relief valve
on the heating water side.
1. Close the shut-off valves (field supplied) on the
heating water side.
2. Remove cover panel A.
3. Connect one end of the supplied drain hose to the
boiler heat exchanger air vent valve Band route the
other end to the drain system.
Note: The drain hose is located loosely inside the heat
exchanger compartment.
4. Open air vent valve Busing the supplied key and fill
via the sediment faucet Cin the heating return and
vent using mains pressure (flush) until no more air
noise can be heard.
Note: The key is supplied with the installation fittings.
5. Close valve Band fill valve Cin the heating return,
and open the shut-off valves on the heating water
side.
6. Activating the venting program:
Service menu
- Press OK and simultaneously for approximately
4 seconds.
- “Service functions”
- “Venting” (bleeding)
Venting function is enabled.
Ending venting function:
- Press OK or .
Bleed (Vent) Air from Heating System
1. Close the gas shut-off valve and switch the control
unit ON.
2. Activate venting program (see next steps).
- Press OK and simultaneously for approximately
4 seconds.
- “Service functions”
- “Venting”
Venting function is enabled.
Ending venting function:
- Press OK or .
3. Check the system pressure.

15
5461 890 - 09
Vitodens 222-F B2TB 19 and 35 Service Start-up
Note: The outer conductor “L “ and the neutral conductor
“N” must not be interchanged.
See wiring diagram on page 90 in section entitled
“Additional Information”.
IMPORTANT
In Canada all electrical wiring is to be done in accordance
with the latest edition of CSA C22.1 Part 1 and/or local
codes. In the U.S. use the National Electrical Code ANSI/
NFPA 70. The heating contractor must also comply with
both the Standard for Controls and Safety Devices for
Automatically Fired Boilers, ANSI, ASME CSD-1.
An external accessories connection box is integrated
within the Vitodens 222-F, B2TB boiler, which requires a
120V AC power supply from a wall receptacle (12A fuse
protected).
Refer to the Installation Instructions shipped with the
boiler.
Voltage range
The voltage at connector fÖ of the boiler control must be
120V (see wiring diagram).
Neutral conductor
The electrical power supply must have a neutral conductor.
Designating Heating Circuits
Information on entering names for heating
circuits see Operating instructions
In the factory set condition, the heating circuits are
designated “Heating circuit 1”, “Heating circuit 2” and
“Heating circuit 3” (if installed).
If the system user prefers, the heating circuits can be
designated differently to suit the specific system.
Select Gas Type
Note: The Vitodens 222-F, B2TB boiler is factory set to
operate with natural gas. See following subsection
for conversion instructions to liquid propane gas.
1. Ensure that the fuel type listed on the boiler rating
plate is the correct type for the installation being
attempted.
2. Record fuel type in Maintenance Record on page 103.
The Vitodens 222-F boiler is for use with gases whose
characteristics fall within the following ranges.
Do not use any other types of gas.
Natural gas Liquid propane gas
Heating value (gross) Btu/ft3970 to 1100 2466 to 2542
Specific gravity 0.57 to 0.70 1.522 to 1.574
Ultimate carbon dioxide (CO2) % 11.7 to 12.2 13.73 to 13.82
Check Power Supply Connection

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
16
Start-up
Convert Fuel Type to Liquid Propane Gas
1. Set adjusting screw Aat the gas valve to “2”
(using a hex key, 2.5 mm).
Note: The Vitodens 222-F, B2TB boiler comes factory
adjusted for operation with natural gas. Coding
address “82” is set to “0” (operation with
natural gas) in the factory default setting.
2. Switch ON/OFF switch “8” to ON.
Note: Slide the black control cover outwards to
access the ON/OFF switch.
3. Select the gas type in coding address “82”.
- Call up coding level 2. (see page 49)
- Call up “General”.
- In coding address “11” select value “9”.
- In coding address “82” select value “1” (operation
with liquid propane gas).
- Go back to coding address “11” and select any
value (except “9”).
- Terminate coding level 2.
4. Open gas shut-off valve.
5. Apply LPG supplied fuel conversion labels.
Setting Altitude Parameters
In the factory default setting, the boiler is equipped to
operate in altitudes of up to 5,000 ft. (1,500 m).
Altitude can be set using coding address 93:
(in coding level 2 General).
- Coding 11:9 must be set in order to unlock coding 93:.
- 93:0 is reserved for altitudes up to 5000 ft. (1500 m).
- 93:6 must be set for altitudes from 5000 ft. (1500 m).
to 10000 ft. (3000 m)
- Setting back to 93:0 turns off the high altitude
function.
IMPORTANT
Do not set or use coding addresses 93:1 to 93:5.
- After setting coding address 93:, set coding address 11:0
- The program is automatically disabled after 20 minutes.

17
5461 890 - 09
Vitodens 222-F B2TB 19 and 35 Service Start-up
Checking the Static and Supply Pressure
The burner is automatically ignited and starts operation
after a safety time has elapsed. During initial start-up,
the unit may indicate a fault because of air in the gas
supply pipe (especially for liquid propane gas). After
approximately 5 seconds, press the ”R” button to reset
the burner. The ignition procedure is repeated. This boiler
employs a direct spark ignition system.
WARNING
Ensure that there is no open flame in the room.
IMPORTANT
Operation with LPG
Purge the LPG tank and gas supply line twice during
commissioning or replacement.
WARNING
CO build-up as a result of incorrect burner adjustment
can have serious health implications.
Carry out a CO test before and after work on gas
appliances.
WARNING
Gas escaping from the test nipple leads to a risk of
explosion. Check gas tightness at test nipple A.
WARNING
Never purge a gas line into a combustion chamber.
Never use matches, candles, flame, or other sources of
ignition for purpose of checking leakage. Use a soap and
water solution to check for leakage. A failure to follow
this warning could result in fire, explosion, personal injury
or death.
Running supply pressure with Corrective action
NG LPG
under 4 ”w.c. under 10 ”w.c. Do not start the boiler.
Notify your gas supply
utility or LPG supplier.
4 to 14 “w.c. 10 to 14 “w.c. Start up boiler.
over 14 “w.c. over 14 “w.c. Do not attempt
adjustment. Call local
gas utility to decrease
pressure or install up
stream gas pressure
regulator. Boiler valve
must not be exposed to
pressure over 14 ”w.c.
1. To measure static and/or running pressure remove
boiler enclosure panel as indicated page 11 and 14
in these instructions.
2. Close gas shutoff valve.
3. Loosen screw at inlet gas pressure port Aon the
gas combination valve, do not remove completely.
Connect manometer.
4. Open the gas shutoff valve.
5. Measure static pressure. Values must be:
14 “w.c. max. for NG
14 “w.c. max. for LPG
6. Enter measured value into Maintenance Record on
page 103 in this manual.
7. Start up boiler, using the ON/OFF switch “
8 “ on
the boiler control.
8. Measure the running pressure, see chart.
9. Enter gas type into Maintenance Record on page
103 in this manual.
10. Switch off the ON/OFF switch “
8 “ on the boiler
control, close the gas shut-off valve, remove the
manometer and re-tighten the screw at inlet gas
pressure port A.

Vitodens 222-F B2TB 19 and 35 Service
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18
Sequence of Operation and Potential Faults During Each Start-up Cycle
Measures
Call for heat by control
Fan starts up
Display message
Increase boiler water set-point
temperature and ensure that
there is heat demand
yes
no After approx.
51 s fault F9
Check cabling and plug-in connector
of the fan, fan connecting cables,
power at the fan and fan control
yes
yes
yes
yes
no
no
no
no
Ignition
Gas train opens
Ionization current builds
Symbol A
Burner in operation Stops below
the set boiler
water
temperature
and restarts
immediately
(cycles)
Fault EE
Fault EE
Fault EE Check the ignition module
(control voltage 120V across
plugs “X2.1” and “X2.2”)
Fault EE Check the gas combination
valve (control voltage 120V); check
the gas supply pressure
Check the ionization electrode setting
and purge gas line.
Check the flue gas system for leakage
(flue gas recirculation), check the gas
flow pressure
Automatic calibration of
the combustion controller
Fault E3
Fault EB
Ensure adequate heat transfer.
Press reset button R.
Check gap between ionization electrode
and burner gauze assembly. Check
allocation of gas type (coding address 82,
gas valve setting). Check flue gas system;
remedy flue gas recirculation if required.
Press reset button R.
yes
no
no
For further details regarding faults, see page 69.
Start-up

19
5461 890 - 09
Vitodens 222-F B2TB 19 and 35 Service Start-up and Service
Set Maximum Output
The maximum output for heating operation can be limited.
The limit is set via the modulation range. The maximum
adjustable heating input (or output) is limited upwards by
the boiler coding card.
Note: The input for DHW production can be limited as
well. To do so, change coding address “6F” in
coding level 2.
1. Press OK and simultaneously for approximately
4 seconds.
2. “Service functions”
3. “Maximum output”
4. “Change?” Select “Yes”.
A value flashes on the display (e.g.“85”). In the
factory setting, this value represents 100%
of rated output.
5. Select required value.
Check All Primary and Secondary Circuit Connections for Leaks
Check heating system and domestic hot water
connections. Ensure all connections are pressure tight.
Correct any leaks found on fittings, pumps, valves, etc.
A CO measurement (see page 28) must be taken before
and after working on gas appliances to eliminate risks to
health and to guarantee the satisfactory condition of the
system.
Record the measured combustion values in the sequence
stated in the Maintenance Record on page 103 in this
manual.
IMPORTANT
Perform Combustion Analysis

Vitodens 222-F B2TB 19 and 35 Service
5461 890 - 09
20
Service
Legend
ACombustion air measuring port
Viessmann strongly recommends that the heating
contractor perform a simplified leak test during boiler
start-up. For this purpose it is sufficient to measure
the CO2concentration of the combustion air in the
coaxial gap of the air intake pipe. The vent pipe is
considered sufficiently leak-proof if a CO2concentration
in the combustion air no higher than 0.2% or an O2
concentration no lower than 20.6% is measured.
If higher CO2values or lower O2values are measured,
check venting system thoroughly.
Note: The vent pipe adaptor comes with two
measurement ports, one for combustion air-intake
measurement and one for flue gas measurement.
Checking the Balanced Flue System Tightness (Annular Gap Check)
Remove Burner Assembly
CAUTION
To avoid damage to the burner, do not lay burner on its
cylindrical burner tube or touch the burner tube mesh.
Failure to heed this caution may cause damage to the
burner tube, which may lead to improper operation.
1. Switch OFF the main power supply and the ON/OFF
switch 8 at the control unit.
2. Close the gas shut-off valve and safeguard against
reopening.
3. Remove front upper panel, see page 11.
4. Flip down control console, see page 11.
5. Remove boiler inner cover.
6. Pull electrical cables from fan motor A, gas valve B,
ionization electrode C, ignition unit Dand ground
wire E.
7. Release gas supply pipe fitting F.
8. Remove four torx screws G.
9. Remove burner assembly.