Viessmann VITODENS 200-W B2HE 85 User manual

for use by heating contractor
Please file in Service Binder
6167 812 - 03 07/2021
Installation Instructions
VITODENS 200-W
Read and save these instructions
for future reference.
Product may not be exactly as shown
IMPORTANT
H
Vitodens 200-W, B2HE
Models 85 to 199
Wall mounted gas-fired condensing boiler with 7 inch color touchscreen display
For operation with natural gas or liquid propane gas
Heating Input: 8.5 to 199 MBH
2.5 to 58.3 kW

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
6167 812 - 03
22
Safety
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 Safety 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 “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.
WARNING
Do Not operate the boiler without the front cover in place.

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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Safety
About these Installation 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
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
Boiler 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 boiler.
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.

4
Page
Table of Contents Vitodens 200-W B2HE 85, 120, 150, 199 Installation
6167 812 - 03
Safety, Installation and Warranty Requirements..............2
About these Installation Instructions .............................3
Important Regulatory and Installation Requirements ....... 6
High Limit Safety Cut-out Test.....................................7
Applicability..............................................................8
Intended Use.............................................................8
Product Information....................................................9
System Examples ......................................................9
Fitting and Sealing Points...........................................9
Mechanical Room ....................................................10
Set-up ....................................................................11
Minimum Clearances.................................................11
Models 200-W, B2HE 85, 120...................................12
Models 200-W, B2HE 150, 199.................................13
Preparing the Connections.........................................14
Removing the Front Panel..........................................15
Wall Mounting .........................................................16
Fitting the Boiler to the Wall Mounting Bracket.............18
Fitting the Programming Unit Mounting Bracket
on the Top of the Boiler ............................................18
Connections on the Heating System and DHW Tank
Heating...................................................................19
Piping Connections ...................................................19
Condensate Connection ............................................22
Filling the Siphon Trap with Water..............................23
Neutralization Unit....................................................23
DHW ......................................................................24
Safety Valve............................................................25
Flue Gas Connection.................................................26
Electrical Connections...............................................27
WiFi Operational Reliability and System Requirements...34
Closing the Junction Box...........................................35
Fitting the Programming Unit and Front Panel...............36
Adjusting Pump Rate of Integral Circulation Pump ........37
Safety
General Information
Before Set-up
Dimensional Information
Boiler Connections

5
Page
Table of Contents
Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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Installation Examples ................................................38
System Layout 1......................................................39
System Layout 2......................................................40
System Layout 3......................................................41
System Layout 4......................................................42
System Layout 5......................................................43
System Layout 6......................................................44
System Layout 7......................................................45
System Layout 8......................................................46
System Layout 9......................................................47
System Layout 10 ....................................................48
Alternative DHW Connection .....................................49
Boiler in Heating/Cooling Application...........................50
Boiler with Low Water Cut-off (remote-mounted,
field supplied) ..........................................................51
Overview of Electrical Connections........................ 52
Technical Data........................................................ 53
Lighting and Operating Instructions
Installation Examples
Connection and Wiring Diagram
Additional Information

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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.
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.
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.
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.
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 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.
The Maintenance Record is located in the Service
Instructions
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.
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
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.
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.

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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 sidewall 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 gasfitter 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 gasfitter 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.
As per ASME Boiler and Pressure Vessel Code, section IV, subsection HG-613 TEMPERATURE CONTROL requirements, Vitodens
200-W hot water boilers are protected from over-temperature by two temperature-operated controls. These temperature control
devices conform to Standards for Limit Controls, and are accepted by CSA, a nationally recognized testing agency. Each boiler
is equipped with a manual reset high temperature limit control and a temperature control that will cut off fuel supply when the
system water temperature reaches a preset operating temperature. VIESSMANN IS NOT RESPONSIBLE FOR ANY DAMAGES
THAT THE FOLLOWING TEST PROCEDURE MAY RESULT IN BY OVERHEATING THE SYSTEM.
The Vitodens 200 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.
High Limit Safety Cut-out Test
Tap the following buttons:
1. “ “
2. “Service”
3. Enter password “viservice”.
4. Confirm with .
5. “Test modes”
6. “High limit safety cut-out test”
7. Confirm with .
Note: Ensure adequate heat transfer.
8. Use to end the Test.
To ensure proper operation of the high limit cut-out test
in cascade systems, only activate it at one boiler at a
time. While running the test the other boilers should be
switched off or set to standby. Vitoguide is required to
activate the high limit test on lag boilers.
IMPORTANT

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Applicability
General Information
When ordering replacement parts, provide either the
16-digit boiler serial number (on the rating plate) or the
12-digit ASME/NB serial number, located as shown
underneath boiler front enclosure panel. Refer to page 15
for instructions on how to remove front enclosure panel.
Model No. Serial No.
B2HE 85 7722778jjjjjjjjj
B2HE 120 7722779jjjjjjjjj
B2HE 150 7722780jjjjjjjjj
B2HE 199 7722781jjjjjjjjj
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
200-W B2HE boiler.
IMPORTANT
AInox-Radial heat exchanger made from stainless steel
– for high operational reliability and a long service life.
Large heating output in the smallest of spaces
B Modulating MatrixPlus cylinder burner for extremely
clean combustion and quiet operation
CVariable speed combustion fan for quiet and
economical operation
DGas and water connections
E7 in. color touch screen boiler control unit
Product may not be exactly as shown
Intended Use
The boiler is only intended to be installed and operated
in sealed unvented heating systems, with due attention
paid to the associated installation, service and operating
instructions. It is only designed for the heating of water
that is of potable water quality.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific components
has been carried out.
Commercial or industrial usage for a purpose other
than heating the building or DHW shall be deemed
inappropriate.
Any usage beyond this must be approved by the
manufacturer in each individual case.
Incorrect usage or operation of the boiler (e.g. the
boiler being opened by the system user) is prohibited
and results in an exclusion of liability. Incorrect usage
also occurs if the components in the heating system are
modified from their intended use (e.g. if the flue gas and
ventilation air paths are sealed).

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Product Information
Vitodens 200-W, type B2HE
Wall mounted gas condensing boiler with Inox-Radial
heat exchanger and the following integrated components:
Modulating MatrixPlus burner for natural gas or LPG
Hydraulics with 3-way diverter valve and variable
speed high efficiency circulation pump
Weather-compensated or constant temperature control
unit
DHW production
Vitodens 200-W boilers are for operation with natural gas.
For a fuel conversion to liquid propane gas refer to the
service instructions for details.
Boiler model must be selected based on an accurate heat
loss calculation of the building. Ensure boiler model is
compatible with connected radiation.
Vitodens 200-W, boilers are factory-tested and calibrated.
Further gas valve adjustments are not typically required
during field start-up.
The rating plate of the boiler contains extensive product
information and is boiler-specific. Access code with the
marking “i” for direct access to product-specific
information and product registration on the internet.
The access code contains the credentials for the
registration and product information portal, as well as the
16-digit serial number.
Note: A further label with the access code is enclosed
with the boiler.
Stick the label in the operating and service
instructions so it can be easily found again for
later use.
System Examples
System examples with hydraulic and electrical connection
schemes and function descriptions are available to help
setting up the heating system, refer to the system layouts
starting on page 38.
Fittings and Sealing Points
All connections must be fitted with new gaskets after
opening or loosening.
WARNING
Risk of electric shock from escaping heating water or DHW.
When commissioning and after carrying out maintenance
work, check all water side connections for leaks.
General Information
ARating plate with access code for boiler registration

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Mechanical Room
General Information
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 179 lb. (81 kg) [the weight of the boiler]. 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 95ºF (35ºC).
HEnsure ambient temperatures are higher than 32°F
(0°C) and lower than 95°F (35°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.
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)
WARNING
If you notice fire coming from the boiler, 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

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Before Set-up
Set-up
Note: The Vitodens 200-W, B2HE boiler has passed the
zero inches vent clearance to combustibles testing
requirements dictated by the boiler Harmonized
Standard ANSI Z21.13. CSA 4.9 (latest edition)
and therefore is listed for zero clearance to
combustibles when vented with a single-wall
special venting system (AL-29-4C material) or
UL/ULC-listed CPVC/PPs gas vent material. The
zero inches vent clearance to combustibles for
the Vitodens 200-W, B2HE boiler supercedes the
clearance to combustibles listing that appears on
the special venting system label.
Recommended minimum service clearances
Before placing boiler in its installation location, ensure all
necessary accessories are installed.
Minimum Clearances
CAUTION
The boiler must be installed in such a way that gas
ignition system components are protected from water
(spraying, splashing, etc.) during boiler operation and
service.
Table 1 Clearances
Top Front Rear Left Right Vent pipe
00ALCL0000
See the Vitodens 200-W B2HE Venting
System Installation Instructions for details.
AL = Alcove
CL = Closet
Top clearance 12 in. (300 mm)
Front
Side
Side
Back
Top
6”/150 mm

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12
Dimensional Information
Models 200-W, B2HE 85, 120
Front view Side view
Legend
ASafety valve, pressure gauge connection
BCondensate drain
CHeating system supply
DDHW tank heating supply
EDHW tank heating return
FHeating system return
GFuel gas connection

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Models 200-W, B2HE 150, 199
Dimensional Information
Front view Side view
Legend
ASafety valve, pressure gauge connection
BCondensate drain
CHeating system supply
DDHW tank heating supply
EFuel gas connection
FDHW tank heating return
GHeating system return

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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14
Preparing the Connections
Legend
DR Boiler heating return for domestic hot water tank
heating
DS Boiler heating supply for domestic hot water tank
heating
HR Heating System Return
HS Heating System Supply
GC Gas Connection
PRV Pressure Relief Valve (supplied with boiler,
see page 25)
BD Boiler Drain (supplied with boiler)
BF Boiler Fill (supplied with boiler)
PG Pressure Gauge (supplied with boiler, see page 25)
*1Field supplied installation fittings
An adequately sized pre-charged expansion tank must be
used. See Installation Examples for details.
IMPORTANT
Note: Install a temperature gauge (field supplied)
anywhere in the supply piping near the boiler (not
shown).
Note: See page 49 for Alternate DHW connection.
Boiler Connections

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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Boiler Connections
1. Unlock the front panel on the underside (push in),
using a screwdriver or similar tool.
2. Swivel the front panel forward slightly and lift
away upwards.
3. Slightly lift away and upwards.
Removing the Front Panel

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16
Wall Mounting
Boiler Connections
Installing the wall mounting bracket
The Vitodens 200-W B2HE can be wall-mounted on a
concrete wall.
Note: The enclosed screws and rawl plugs are only
suitable for concrete. For other construction
materials, use bolts and anchors that are suitable
for 179 lb. (81 kg) loads.
Installation of mounting bracket on brick/concrete wall
1. Mark out the rawl plug holes.
2. Drill holes 7 ein. (710 mm) and insert the rawl
plugs supplied.
3. Fit the wall mounting bracket with the screws supplied.
CAUTION
Whichever mounting method is used, ensure that the
bracket is tightly and securely fastened to wall. Failure
to secure boiler properly could cause boiler to loosen,
posing a severe safety hazard.
Fitting the wall mounting bracket
Following are the installation instructions for the mounting
bracket on each material. See the instructions applicable
to your installation requirements.
Legend
AVitodens wall mounting bracket
Note: Check the condition of the wall where the boiler is
to be installed. For the suitability of the supplied
rawl plugs for various building materials, see the
manufacturer’s instructions.
For other construction materials, use fixing
materials with sufficient load bearing capacity.

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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6167 812 - 03
Boiler Connections
Wall Mounting (continued)
Install mounting bracket on wood studs as per illustration.
Drill 3/16 in. pilot holes to insert mounting bolts. Ensure
that holes are located in the center of each wood stud.
Secure with bolts to wooden studs as shown.
Install mounting bracket on metal studs as per illustration.
Drill fin. pilot holes to insert anchors. Ensure that holes
are located in the center of each metal stud.
Use fasteners to mount boiler mounting bracket to metal
studs (supplied). Secure with bolts to metal studs as
shown. Ensure the mounting bracket is level.
Boiler mounting bracket installation on wood studs
Boiler bracket
Boiler bracket
Boiler mounting bracket installation on metal studs

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
6167 812 - 03
18
Fitting the Boiler to the Wall Mounting Bracket
Boiler Connections
Note: Various installation components can be found
installation fittings kit. Keep the installation
components safe, as they will be required for
later installation.
Note: To prevent dirt from entering the connections:
Do not remove the protective caps until you are
about to fit the boiler.
1. Mount the boiler on the wall mounting bracket.
Ensure that all four tabs have locked into the boiler.
2. Remove plastic shipping caps from the boiler
connections.
3. Remove the wooden blocks from the bottom rails
of the boiler.
Fitting the Programming Unit Mounting Bracket on the Top of the Boiler
In the delivered condition, the programming unit is located
on the underside of the boiler. If required for ease of
operation, the programming unit can be located on the top
of the boiler. To do so, reposition the bracket at the top.
1. Remove the hinges and store them in case they need
to be reinstalled at a later date.
2. Pull in the tabs to release the control housing.
3. Pull forward on the control housing to remove it from
the jacketing.
4. Disconnect the plug of the connecting cable from the
bracket.
Note: Incorrect routing of the cable can lead to heat
damage and impairment of the EMC properties.
Do not change the position of the cable or its
fixture (fixing point on casing).
5. Rotate the control housing 180 degrees.
6. Insert the plug on the right-hand side again.
7. Re-install the control housing into the up jacket.
8. Install the clips provide into the openings in the
bottom of the front cover.

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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6167 812 - 03
Boiler Connections
Legend
AHeating system supply
85, 120 ¾ in. NPT
150, 199 1 in. NPT
BDHW Tank heating supply
85, 120 ¾ in. NPT
150, 199 1 in. NPT
B2HE 85, 120
B2HE 150, 199
Connections on the Heating System and DHW Tank Heating
Connections on the heating water and DHW sides
If the connections have not been fitted previously, make
the connections on the heating water and DHW sides.
Note: If no tank is connected, close off the tank supply
and return with caps.
Note: If the boiler is used for directly connected DHW
only a bypass must be installed from boiler supply
to boiler the boiler return.
Heating water connections
1. Thoroughly flush heating system (particularly before
connecting the boiler to an existing system).
2. Connect boiler to the heating system.
Note: Use an approved pipe sealant or teflon tape
when connecting the installation fittings.
Use a two-hand wrench method when tightening
fittings or piping onto the boiler connectors. Use
one wrench to prevent the boiler pipes from twisting
and the second wrench to tighten the fitting or
piping. Failure to support the boiler connection could
damage the boiler and its internal piping.
All plumbing must meet or exceed all local state and
national plumbing codes.
Max. allowable working pressure (MAWP):
B2HE 85/120 .....................45 psig (3 bar)
B2HE 150/199 ...................60 psig (4 bar)
WARNING
Exposing the boiler to pressures and temperatures in
excess of those listed will result in damages, and will
render warranty null and void.
CDHW Tank heating return
85, 120 ¾ in. NPT
150, 199 1 in. NPT
DHeating system return
85, 120 ¾ in. NPT
150, 199 1 in. NPT
EGas connection NPT ¾ in. (male thread)
Piping Connections
Proper piping practice
Support piping by proper suspension method.
Piping must not rest on or be supported by boiler.
2 imperfect threads Use moderate amount of dope
Leave 2 threads bare
See following page for details on gas connection and piping.
WARNING
Do not damage the gas pipe!
The gas pipe must not come into contact with any
other components in the appliance.
Keep the gas pipe from twisting during tightening by
using the two wrench system. Do not use pliers!

Vitodens 200-W B2HE 85, 120, 150, 199 Installation
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20
Boiler Connections
Gas connection and piping (continued)
Max. gas supply pressure: 14 “w.c.
1. Make gas connections in accordance with codes
CAN/CSA B149.1 or 2 in Canada.
In the United States, use the National Fuel Gas Code
ANSI Z223.1/NFPA 54, as well as local codes for gas
piping requirements and sizing. Pipe size to the boiler
must be determined based on:
- pipe length
- number of fittings
- maximum input requirements of all gas boilers in
the residence.
Design piping layout in such a way that piping does not
interfere with serviceable components.
2. Before connecting boiler to gas line, install ground
joint union, capped drip leg and a manual equipment
shutoff valve. Valves must be listed by a nationally
recognized testing agency. Make boiler gas
connection as shown on the left.
Gas connection (NPT)..................................7¾ in.
3. Perform gas piping pressure test as described in the
following subsection.
4. Identify shutoff valves as such with a tab and
familiarize operator / ultimate owner of boiler with
these valves.
WARNING
The gas supply piping must be leak tested before
placing the boiler in operation.
CAUTION
Ensure that gas piping is large enough for all boilers in
the residence. No noticeable gas pressure drop in the
gas line must occur when any unit (or combination of
units) lights or runs.
IMPORTANT
IMPORTANT
½ psig = 14 “w.c.
1. Isolate the boiler from the gas supply piping system
using the individual manual shutoff valve during
pressure tests equal to or less than ½ psig (14 “w.c.)
2. The boiler and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of ½ psig (14 “w.c.)
3. Perform leak test. Use approved liquid spray solution
for bubble test. Ensure that no liquid is sprayed on
any electrical components, wires or connectors. Do
not allow leak detection fluid to contact gas valve
regulator or regulator vent opening.
4. Correct any and all deficiencies.
5. Remove air from gas line.
Gas piping pressure test
When performing the gas piping pressure test, ensure the
following requirements are met.
WARNING
Never check for gas leaks with an open flame.
WARNING
Exposing boiler gas pressure regulator and gas valve to
extreme pressures renders warranty null and void.
Legend
AGas connection to boiler
BUnion
CAccessible manual gas shutoff
DDrip leg
EBoiler gas control switch
Piping Connections (continued)
B2HE 85, 120
B2HE 150, 199