Viessmann B1KE Combi Series Quick guide

Installation and Service
Instructions
VITODENS 100-W
6167 818 - 10 10/2022
for use by heating contractor
Please file in Service Binder
Read and save these instructions
for future reference.
Product may not be exactly as shown
IMPORTANT
Vitodens 100-W
B1HE Series and B1KE Combi Series
Wall mounted gas-fired condensing boiler with
3.5 inch black/white display
On demand domestic Hot Water with Combi Boilers
For operation with natural gas or liquid propane gas
Heating input: 8.5 to 199 MBH
2.5 to 58.3 kW
H

2
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Safety, Installation and Warranty Requirements
Safety
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
manufacturer’s maintenance schedule of the boiler.
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 “Combustion Air Supply”.
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 instructions supplied with
burner.
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
“Combustion Air Supply”.
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.

3
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Table of Contents
Safety, Installation and Warranty Requirements..............2
Important Regulatory and Installation Requirements ....... 5
About these Installation Instructions .............................6
Applicability..............................................................7
Mechanical Room ......................................................8
Product Information....................................................9
System Examples ....................................................10
Fitting and Sealing Points.........................................10
Minimum Clearances.................................................10
Boiler Dimensions.....................................................11
Mounting the Boiler and Making Connections...............13
Piping Connections ..................................................18
Neutralization Unit....................................................21
DHW Tank Connection..............................................22
Safety Valve............................................................23
Flue Gas Connection.................................................24
Electrical Connections...............................................25
WiFi Operational Reliability and System Requirements...29
Closing the Junction Box...........................................30
Fitting the Programming Unit and Front Panel...............31
Adjusting pump Rate of Integral Pump ........................32
System Layout 1......................................................33
System Layout 2......................................................34
System Layout 3......................................................35
System Layout 4......................................................36
System Layout 5......................................................37
System Layout 6......................................................38
Boiler with Low Water Cut-off
(remote mounted, field supplied) ................................39
Commission the System with the Commissioning
Assistant.................................................................40
Filling the Heating System .........................................42
Checking All Connections on the Heating Water and
DHW Sides for Leaks ................................................44
Checking the Gas Type .............................................44
Converting the Gas Type for Operation with LPG..........45
Removing the Front Panel..........................................45
Removing the Programming Unit to the Maintenance
Position...................................................................46
Checking the Static Pressure and Supply Pressure ........47
Function Sequenceand Possible Faults ........................48
Seal Test on Coaxial Flue System (annular gap check) ....49
Safety
General Information
Dimensions
Installation
Commissioning
Page

4
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Table of Contents
Removing the Burner ................................................50
Checking the Burner Gasket and Flame Body Assembly ..51
Checking and Adjusting the Ignition and
Ionization Electrodes.................................................53
Checking the Flue Gas Flapper ...................................53
Cleaning the Heating Surfaces ..................................54
Check Condensate Drain / Cleaning the Siphon Trays....55
Installing the Burner ................................................56
Checking the Neutralization System (if Installed) ..........57
Check the Flow Limiter (only for gas condensing
combi boiler)............................................................57
Checking the Expansion Tank (on site) and System
Pressure..................................................................58
Checking the Safety Valve Function ...........................58
Checking All Gas Equipment for Leaks at
System Presure .......................................................58
Fitting the Front Panel...............................................58
Checking the Combustion Quality.............................59
Checking the CO2Content / Relay Tests .....................60
Clock Natural Gas Meter ...........................................60
Calling Up and Resetting the Maintenance Display ........60
Instructing the System User.......................................61
Calling Up Parameters...............................................61
General ...................................................................62
Boiler ......................................................................63
DHW ......................................................................65
Service Menu...........................................................67
Checking Outputs (actuator test)................................67
Fault Display on the Programming Unit........................69
Overview of Electronic Modules ..................................71
Fault Messages ........................................................72
Repairs....................................................................82
Opening the Junction Box .........................................89
Boiler Functions .......................................................91
DHW Heating...........................................................92
Increased DHW Hygiene ..........................................92
Call for Heat ........................................................ 92
Overview of the Modules ..................................... 93
HMU Heat Management Unit .................................... 94
BCU Burner Control Unit........................................... 95
Wiring Panel ............................................................96
B1HE Models 85 / 120 / 150 / 199 ............................97
B1KE Models 120 / 199............................................98
Service Reports........................................................99
Technical Data ....................................................... 100
Parts List..............................................................103
Lighting and Operating Instructions........................... 125
Service
System Configuration (parameters)
Diagnostics and Service Checks
Troubleshooting
Function Descriptions
Wiring Diagrams
Maintenance Record
Specification
Parts
Additional Information
Page

5
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Safety
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 (latest edition), where required by the authority
having jurisdiction.
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.
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.

6
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Safety/ General Information
Important Regulatory and Installation Requirements (continued)
Working on the equipment
The installation, adjustment, service, and maintenance of
this boiler must be performed 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.
Technical literature
Literature for the Vitodens boiler:
- Technical Data Manual
- Installation and Service Instructions
- Operating Instructions and User's Information Manual
- Vitodens Venting System Installation Instructions
- Quick Start Guide
- Instructions of other products utilized and installed
- Installation codes mentioned
in this manual and as locally applicable
The completeness and functionality of field supplied
electrical controls and components must be verified
by the heating contractor. This includes low water
cutoffs, 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.
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 death, 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.

7
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Applicability
The boiler serial number must be provided when ordering
replacement parts. Both the 16-digit serial number bar
code on the rating plate and the 12-digit ASME serial
number correlate to each other. Providing either serial
number is sufficient.
Model No. Serial No.
B1HE - 85 7722772
B1HE - 120 7722773
B1HE - 150 7722774
B1HE - 199 7722775
B1KE - 120 7722776
B1KE - 199 7722777
IMPORTANT
General Information
Boiler cross-section
Legend
AInox-Radial stainless steel heat exchanger
BStainless steel MatrixPlus cylinder burner
CBurner blower
DGas and hydronic connections
EBlack and white 3.5 inch boiler control display
FIntegrated boiler/DHW production pump
GDHW plate heat exchanger (combi boilers only)

8
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Mechanical Room
During the early stages of new home design, we
recommend that proper consideration be given to
constructing a separate mechanical room dedicated to
gas- or oil-fired equipment including domestic hot water
storage tanks.
The boiler must be located in a heated indoor space,
near a floor drain, and as close as possible to the wall.
Whenever possible, install boiler near an outside wall so
that it is easy to duct the venting system to the boiler.
Locate boiler on walls capable of supporting the weight of
the boiler filled with water (see section entitled “Technical
Data" on page 100 for information required for total
boiler weight calculation). Ensure that boiler location
does not interfere with proper circulation of combustion
and ventilation air of other fuel burning equipment (if
applicable) within the mechanical room.
The maximum room temperature of the mechanical room
where the boiler is located must not exceed 95°F (35°C).
Boiler operation in marine environments (damp, salty
coastal areas):
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
Ensure ambient temperatures are higher than 32°F
(0°C) and lower than 95°F (35°C).
Prevent 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
below indicates the main, currently known sources.
Avoid continuously high levels of humidity
(e.g. through frequent drying of laundry).
Never close existing ventilation openings.
IMPORTANT
WARNING
Incorrect ambient conditions can lead to damage to
the heating system and put safe operation at risk.
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
Fire causes a risk of burns and explosion!
Shut down the boiler
Close fuel shut-off valves
Use a tested fire extinguisher, class ABC.
Sources of combustion and ventilation air contaminants.
Areas likely to contain contaminants:
- New building construction
- Swimming pools
- Remodelling areas, hobby rooms
- Garages with workshops
- Furniture refinishing areas
- Dry cleaning/laundry areas and establishments
- Auto body shops
- Refrigeration repair shops
- Metal fabrication plants
- Plastic manufacturing plants
- Photo processing plants
- Beauty salons
Products containing contaminants:
- Chlorine-type bleaches, detergents and cleaning
solvents found in household laundry rooms
- Paint and varnish removers
- Hydrochloric acid, muriatic acid
- Chlorine-based swimming pool chemicals
- Spray cans containing chlorofluorocarbons
- Chlorinated waxes and cleaners
- Cements and glues
- Refrigerant leaks
- Calcium chloride used for thawing
- Sodium chloride used for water softening salt
- Permanent wave solutions
- Adhesives used to fasten building products and other
similar items
- Antistatic fabric softeners used in clothes dryers
Before set-up
Before placing boiler in its installation location, ensure all
necessary accessories are installed.
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.
h
General Information

9
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service General Information
Product Information
Vitodens 100-W, type B1HE, B1KE
Wall mounted gas condensing boiler with Inox-Radial
heat exchanger and the following integrated components:
Modulating MatrixPlus burner for natural gas and LPG
Hydraulics with 3-way diverter valve and high
efficiency circulation pump
Type B1KE: Plate heat exchanger for DHW heating
Weather-compensated or constant temperature control
unit
The Vitodens 100-W B1HE is available as a gas condensing
boiler for the connection of one DHW tank or as a gas
condensing combi boiler B1KE with an integral plate heat
exchanger for DHW heating. For the connection of
heating circuits and the DHW tank or the DCW/DHW piping
for the B1KE, see installation examples starting on page 33.
In the factory set condition, the Vitodens 100-W is set
up for operation with constant boiler water temperature.
By connecting an outdoor temperature sensor (included
with installation accessories), the boiler can be operated in
weather-compensated mode.
The following are integrated: closed loop hydraulic system
with 2 connections for heating system supply and return,
and 2 connections for DHW tank heating (B1HE) or on
demand DHW heating (B1KE).
These boilers are only intended for installation in close
loop heating systems.
The rating plate of the boiler contains extensive product
information and an 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.
Affix the label in the installation and service
instructions so it can be easily found again for
later use.
ARating plate with access code for boiler registration
Rating plate

10
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Minimum Clearances
Note:The Vitodens 100-W 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 gas vent material.
The zero inches vent clearance to combustibles for
the Vitodens 100-W boiler supercedes the clearance
to combustibles listing that appears on the special
venting system label.
Top clearance - 12 in. (30 cm).
See the Vitodens Venting System
Installation Instructions.
Clearance to combustibles
AL = Alcove
CL = Closet
Top Front Rear Left Right Vent
pipe*1
0 0 AL,
CL
00 0 0
*1 Refer to the Installation Instructions of the Vitodens
Venting System for details.
Recommended minimum boiler clearances to combustibles
Recommended minimum boiler service clearances
Fittings and Sealing Points
All connections on the boiler 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.
Dimensions
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 33.
Front
Side
Side
Back
Top
6”/150 mm

11
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Dimensions
Boiler Dimensions
Front view Side view
B1HE/B1KE 85 and 120
Legend
ASafety valve, pressure gauge connection
BCondensate drain
CHeating system supply
DFor B1HE series, DHW tank heating supply
For B1KE series, DHW
EFor B1HE series, DHW tank heating return
For B1KE series, DCW
FHeating system return
GFuel gas connection

12
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Boiler Dimensions (continued)
Front view Side view
B1HE/B1KE 150 and 199
Legend
ASafety valve, pressure gauge connection
BCondensate drain
CHeating system supply
DFor B1HE series, DHW tank heating supply
For B1KE series, DHW
EFuel gas connection
FFor B1HE series, DHW tank heating return
For B1KE series, DCW
GHeating system return
Dimensions

13
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Installation
Mounting the Boiler and Making Connections
Removing the front panel
1. Unlock the front panel on the underside (push in),
using a screwdriver or similar tool.
2. Swivel the front panel forwards slightly and lift
away upwards.
Note: Do not remove protective caps from
connections on the heating water side and from the
gas connection until you are about to commence
installation.
Start-up and Maintenance
Installing the wall mounting bracket
The Vitodens 100-W 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 196 lb. (86 kg) loads.
Installation of mounting bracket on brick/concrete wall
1. Mark out the rawl plug holes.
2. Drill holes 7ein. (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.
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.

14
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Installation
Mounting the Boiler and Making Connections (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

15
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Installation
Mounting the Boiler and Making Connections (continued)
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 mounting tabs of the wall
mountng bracket 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.

16
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Installation
Mounting the Boiler and Making Connections (continued)
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.
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.
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.

17
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Installation
Mounting the Boiler and Making Connections (continued)
Legend
AHeating system supply
B1HE/B1KE 85, 120 ¾ in. NPT
B1HE/B1KE 150, 199 1 in. NPT
BTank heating supply (B1HE)/DHW (B1KE)
B1HE/B1KE 85, 120 ¾ in. NPT
B1HE/B1KE 150, 199 1 in. NPT
CTank heating return (B1HE)/DCW (B1KE)
B1HE/B1KE 85, 120 ¾ in. NPT
B1HE/B1KE 150, 199 1 in. NPT
DHeating system return
B1HE/B1KE 85, 120 ¾ in. NPT
B1HE/B1KE 150, 199 1 in. NPT
EGas connection NPT ¾” (male thread)
B1HE/KE 85/120
B1HE/KE 150/199
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 (B1HE only).
Note: If the boiler is used for directly connected DHW
only a bypass must be installed from boiler supply
to boiler the boiler return.
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!
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.
WARNING
Exposing the boiler to pressures and temperatures in
excess of those listed will result in damages, and will
render warranty null and void.

18
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Installation
Piping Connections (continued)
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
B1HE/KE 85/120
B1HE/KE 150/199

19
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service Installation
Piping Connections (continued)
Scald protection
DHW temperatures of over 140°F (60°C) can occur
with gas condensing combi boilers. As a result, scald
protection should be installed on site in the DHW pipe.
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.
SUPPORT ALL PIPING USING HANGERS. DO NOT support
piping by the boiler or its components.
Use isolation valves to isolate system components.
The B1HE DHW tank heating supply and return ports
must be capped if the DHW tank is not used.
All plumbing must meet or exceed all local state and
national plumbing codes.
IMPORTANT
Max. allowable working pressure (MAWP):
B1HE/KE 85/120 .....................45 psig (3 bar)
B1HE/KE 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.
General
A distance of 2 in. (50 mm) from uninsulated hot water
pipes to combustible components must be maintained.
If the pipes are provided with a suitable pipe insulation
of sufficient thickness and insulation, the distance
mentioned above is not necessary (see also local gas
regulations).
Legend
ATank heating supply
BHeating system return
CDHW (B1KE only)
DGas connection
E150 psi DHW pressure relief valve (B1KE only)
F Filling valve
GTank heating return
HConnection cold water (B1KE only)
KHeating system supply
LDrain valve
*1 Field supplied components

20
6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Installation
Condensate Connection
Legend
AFlexible discharge tubing
BDischarge tubing
Condensate connection
The Vitodens 100-W B1HE/KE boiler comes with a built-in
condensate trap. An external trap is not required when
connecting the field drain to flexible discharge tubing.
Discharge tubing (field supplied) must be of 1 in. diameter.
Use CPVC, PVC or other material approved by codes
listed below.
The drain pipe and fittings must conform to ANSI
standards and ASTM D1785 or D2846. CPVC or PVC
cement and primer must conform to ASTM D2564 or
F493. In Canada use CSA or ULC listed schedule 40
CPVC or PVC drain pipe, fittings and cement.
If the condensate outlet of the Vitodens 100-W boiler
is lower than the drain, a condensate pump must be
installed. Select a pump which is approved for condensing
boiler applications. To avoid condensate spillage, select
a pump with an overflow switch. The drain connection
must terminate into an open or vented drain as close to
the boiler as possible to prevent siphoning of the boiler
drain.
1. Install the condensate drain pipe onto the boiler
with a suitable gradient. Ensure that there is no
unnecessary bends are created inside the boiler.
Check tightness of siphon connection.
IMPORTANT
Pipe ventilation must take place between the siphon trap
and the neutralization unit (if applicable).
IMPORTANT
As shipped, the flexible discharge tubing Awill be found
with the installation fittings. Ensure the condensate drain
pipe is installed and positioned to allow the condensate to
properly drain.
IMPORTANT
Do not connect the drain pipe from any other boiler, such
as water softener backwash pipe, to Vitodens condensate
drain pipe.
2. Discharge condensate from the boiler into the vented
drainage system, either directly or (if required) via a
neutralization unit (accessory).
Installation Instructions of Neutralization Unit
(if applicable)
Condensate installation example:
Air gap
3. Ensure the condensate discharge tubing is vented
to the atmosphere prior to being plumbed into the
neutralization unit.