Viessmann B2HA 80 User manual

for use by heating contractor
Please file in Service Binder
5685 827 - 14 04/2020
Installation Instructions
Vitodens 200-W, B2HA
Models 80 to 100, 285 to 352
Wall-mounted, gas-fired condensing boiler
For operation with natural gas and liquid propane gas
Heating input: 71 to 352 MBH
20 to 103 kW
VITODENS
r
200-W
Read and save these instructions
for future reference.
Product may not be exactly as shown
IMPORTANT
H

Vitodens 200-W B2HA 80 to 100, 285 to 352 Installation
5685 827 - 14
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 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.
Safety
WARNING
Do Not operate the boiler without the front cover in place.

Vitodens 200-W B2HA 80 to 100, 285 to 352 Installation
3
5685 827 - 14
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
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.

4
Page
Table of Contents Vitodens 200-W B2HA 80 to 100, 285 to 352 Installation
5685 827 - 12
Safety, Installation and Warranty Requirements.............2
Product documentation.............................................2
Warranty................................................................2
Licensed professional heating contractor....................2
Contaminated air....................................................2
Advice to owner......................................................2
Carbon monoxide.....................................................2
Fresh air................................................................2
Equipment venting...................................................2
About these Installation Instructions.............................3
Important Regulatory and Installation Requirements........6
Codes.......................................................................6
Instructing the system user......................................6
Initial start-up..........................................................6
Working on the equipment.......................................6
Technical literature..................................................6
For installations on the Commonwealth of
Massachusetts........................................................7
CSD-1 field testing of high limit switches..................7
Applicability..............................................................8
Product Information....................................................8
Multi boiler system..................................................8
Mechanical Room.....................................................9
Before Set-up........................................................10
Minimum Clearances.................................................10
Recommended minimum service clearances..............10
Preparing the Connections.........................................11
Wall Mounting.........................................................13
Fitting the wall mounting bracket............................13
Installing the wall mounting bracket.........................13
Installation of mounting bracket on
brick/concrete wall................................................13
Boiler mounting bracket..........................................14
Installation on wood studs......................................14
Installation on metal studs....................................14
Frame Mounting....................................................16
Models B2HA 80 to 100, 285 to 352
Frame Mounting....................................................17
Connections............................................................18
Connecting power.................................................18
Boiler venting........................................................18
Proper piping practice.............................................18
Gas shut-off valve connection.................................18
Gas connection and piping......................................19
Gas piping pressure test.........................................20
Heating water connections......................................20
DHW storage tank information.................................21
Making the DHW connections...............................21
Accessing the control unit connections.....................22
Routing the connecting cables.................................24
Connecting DHW sensor.........................................25
Setting altitude parameters.....................................25
Control base.........................................................26
External accessory connection box..........................27
Condensate connection........................................28
Safety
General Information
Set-up
Boiler Connections

5
Page
Table of Contents
Vitodens 200-W B2HA 80 to 100, 285 to 352 Installation
5685 827 - 12
Boiler Connections (continued)
Control Connections
Additional Information
Safety Connections...................................................29
Installing boiler safety devices.................................29
Low water cut-off..................................................30
Waterside Flow........................................................30
Waterside flow (primary circuit)...............................30
Installation Examples.................................................32
General.................................................................32
Clearances............................................................32
System Layout 1-10.................................................33
Alternative DHW Connection....................................43
Boiler in Heating/Cooling............................................44
Boiler in heating/cooling application..........................44
Boiler with Low Water Cut-off..................................45
Boiler with low water cut-off (remote-mounted
field supplied)........................................................45
Venting Connection.................................................45
Electrical Connections..............................................46
Power supply connection of accessories...................46
Connection of accessories.......................................46
Overview of Electrical Connections,
Models B2HA 80 to 100, 285 to 352.........................47
Accessing the X3 Plug..............................................49
Connecting the Low-loss Header Sensor......................49
Connecting the Outdoor Temperature Sensor..............50
External 0-10 Volt Signal Connection.........................51
Connecting a 24VAC Thermostat............................52
Thermostat Connection.......................................53
Pump Connection..............................................54
LON Module..........................................................55
Installing the LON module to the boiler
control board.......................................................55
Connecting the LON module cable...........................55
Accessory Kit..........................................................56
Accessory kit connections for heating circuit
with mixing valve.................................................56
Closing the Control Unit............................................56
Closing the control cover ......................................56
Closing the External Accessory Connection Box............57
Reinstalling the Front Enclosure Panel.........................58
Instructing the system user....................................58
Installation Fittings...................................................59
Technical Data.........................................................60
Lighting and Operating Instructions.............................62