Viessmann Vitodens 222-F Instruction manual

Technical Data Manual
VITODENS
r
222-F
5461 888 - 04 07/2015
Model Nos. and pricing: see Price List
For Natural Gas and Liquid Propane Gas
Gas-fired floor-mounted condensing DHW combi-boiler
12 to 125 MBH (3.5 to 37 kW)
Product may not be exactly as shown
Vitodens 222-F
B2TB Series 19 and 35
Gas-fired floor-mounted condensing DHW
combi-boiler with modulating MatriX
cylinder burner and DHW stainless steel
tank. For room air independent operation
or room air dependent operation.
H

Vitodens 222-F, B2TB 19 and 35 Technical Data
5461 888 - 04
2
Product Information
Vitodens 222-F
2
Delivered condition
Gas condensing boiler with Inox-Radial heat exchanger,
modulating MatriX gas burner for natural gas and LPG
cylinder, expansion vessel, 3-speed high efficiency
circulation pump and integral stainless steel DHW
primary storage tank. Fully piped plumbed and wired.
White epoxy-coated casing. Preset for operation with
natural gas. The conversion to LPG is made at the gas
valve (a conversion kit is not required) and control unit.
The Vitodens 222-F storage combi-boiler combines
the benefits of the Vitodens 222-F with the high DHW
convenience of a separate DHW tank. With the
MatriX gas burner and the stainless steel Inox-Radial
heat exchanger, the Vitodens 222-F offers top technology
for many years of energy efficiency and high heating and
DHW convenience. The Lambda Pro Control combustion
controller and the 3-speed high efficiency circulation
pump, ensure permanently high efficiency, reliable
operation and low power consumption.
The integral stainless steel 26.5 USG (100 L) primary
storage tank offers the same DHW convenience as a
separate DHW cylinder approximately twice the size.
Recommended applications
■Installation in single or semi-detached homes and
apartments.
■New build (e.g. pre-fabricated houses and housing
association projects): installation in utility rooms
and attics.
■Modernisation: Replacement of system boilers,
floorstanding atmospheric gas boilers and oil/gas
boilers with DHW cylinders below.
Benefits at a glance
■Viessmann made SA240 316Ti stainless steel Inox-
Radial heat exchanger constructed to CSA B51 and
ASME Section IV
■Viessmann made stainless steel MatriX cylinder burner
with Lambda Pro combustion management system for
continuous efficiency and low emissions
■2 models with input ranges from 12 to 125 MBH
■Viessmann made SA240 316Ti stainless steel DHW
storage tank 26.5 USG (100 L)
■Zero side clearance requirement
■Pre-installed pressure / temperature relief valves
■Fully enclosed heating expansion tank and circulation
pump
■Exceeds Energy Star® Efficiency Requirements
■Built-in 3-speed DHW / space heating pump with
diverter valve
■Suitable for altitude levels up to 10,000 ft. (3,050 m)
■Wide modulation ratio up to 6.5:1
■Multiple venting options with vent length up to
180 ft. (55 m)
■10-minute peak flow of 60 USG (227 L)*
■Continuous DHW draw of 3.3 GPM*
* Based on a temperature rise of 70ºF (39ºC)
50ºF to 120ºF (10ºC to 49ºC)
(model B2TB-35 only)
■Fast heat-up with Storage Tank Loading System
■Innovative DHW Storage Tank Loading System
comprised of plate heat exchanger, DHW loading pump
and storage tank
■Certified to CSA Low Lead Content Certification Program;
including US Safe Drinking Water Act, NSF/ANSI 372
as well as other applicable US State requirements
Innovative Storage Tank Loading System (STLS)
Advanced Storage Tank Loading System technology in
the Vitodens 222-F ensures a reliable and efficient DHW
supply equivalent to that of a larger tank. The STLS
utilizes an external plate heat exchanger and DHW loading
pump for extremely fast heat-up capable of delivering a
10 minute peak flow of 60 gallons or continuous DHW
draw of 3.3 GPM*.

Vitodens 222-F, B2TB 19 and 35 Technical Data
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5461 888 - 04
Product Information
3
Cross-Section
Product may not be exactly as shown
The flue gas temperature is only approximately 9-27ºF
(5-15ºC) above boiler return temperature (see chart
below).
Vitodens 222-F, series B2TB 19 and 35 AStainless steel Inox-Radial heat exchanger for high
operational reliability, a long service life and high
heating output in the smallest space
BModulating MatriX cylinder gas burner for extremely
clean combustion
CIntegral diaphragm expansion tank
DDigital boiler control unit
EIntegral, 3-speed high efficiency circulation pump
FStainless steel DHW primary storage tank.
Vitodens 222-F boiler efficiency dependent on system
heating water return temperatures and load conditions

Vitodens 222-F, B2TB 19 and 35 Technical Data
5461 888 - 04
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Technical Data
Technical Data
4
Boiler Model No. 222-F B2TB 19 35
Natural Gas / Liquid Propane Gas
CSA input
CSA output/DOE *1
heating capacity
Net AHRI rating *2
MBH
kW
MBH
kW
MBH
kW
12-68
3.5-20
11-64
3.2-19
55
16
19-125
5.5-37
18-117
5.1-34
102
30
Heat exchanger surface area ft.2
m2
12.96
1.2
12.96
1.2
Min. gas supply pressure
Natural gas
Liquid propane gas
“w.c.
“w.c.
4
10
4
10
Max. gas supply pressure *3
Natural gas
Liquid propane gas
“w.c.
“w.c.
14
14
14
14
A.F.U.E. %9595
Weight
(including installation fittings)
lbs
(kg)
278
(126)
278
(126)
Boiler water content USG
(L)
1.02
(3.88)
1.02
(3.88)
Boiler max. flow rate *4 GPM
(L/h)
6.2
(1400)
6.2
(1400)
Expansion tank *5
(for heating system side)
Precharge pressure
Capacity
psig
USG
(L)
12
3.2
(12)
12
3.2
(12)
Max. operating pressure
at 210ºF (99ºC)
psig
bar
45
3
45
3
Boiler water temperature
- Adjustable high limit (AHL) range
space heating (steady state)
- Fixed high limit (FHL)
ºF
(ºC)
ºF (ºC)
68 to 165
(20 to 74)
210 (99)
68 to 165
(20 to 74)
210 (99)
Boiler connections
Boiler heating supply and return
Pressure relief valve
Drain valve
Boiler supply/return for
indirect-fired DHW storage tank
(field supplied)
Gas valve connection
NPTM”
NPTF”
(male
thread)
NPT”
NPTF”
¾”
¾”
¾”
¾”
¾”
¾”
¾”
¾”
¾”
¾”
*1 Output based on 140ºF (60ºC), 120ºF (49ºC) system supply/return temperature.
*2 Net AHRI rating based on piping and pick-up allowance of 1.15.
*3 If the gas supply pressure exceeds the maximum gas supply pressure value, a separate gas pressure regulator
must be installed upstream of the heating system.
*4 See “Waterside Flow” starting on page 8 in this manual.
*5 Determine the required size of the expansion tank to be installed in the heating system.
If the integral expansion tank is insufficient, install a suitably sized expansion tank on site.

Vitodens 222-F, B2TB 19 and 35 Technical Data
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5461 888 - 04
Technical Data
5
Technical Data
Boiler Model No. 222-F B2TB 19 35
Dimensions
Overall depth
Overall width
Overall height *12
inches
(mm)
inches
(mm)
inches
(mm)
23b
(595)
23f
(600)
64
(1625)
23b
(595)
23f
(600)
64
(1625)
Flue gas *6
Temperature (at boiler return temperature of 86ºF (30ºC)
- at rated full load
- at rated partial load
Temperature (at boiler return temperature of 140ºF (60ºC)
ºF (ºC)
ºF (ºC)
ºF (ºC)
113 (45)
95 (35)
154 (68)
113 (45)
95 (35)
154 (68)
Average condensate flow rate *7
with natural gas and TS/TR=122/86ºF (50/30ºC) USG/h
(L/h)
2.6-3.4
(10 - 12)
4-4.5
(15 - 17)
Condensate connection *8 hose nozzle
Ø in. ¾-1” ¾-1”
Boiler flue gas connection *9 Ø in. (mm) 23/8” (60) 23/8” (60)
Combustion air supply connection (coaxial) outer Ø
in. (mm) 4” (100) 4” (100)
Sound Rating
- at maximum input
- at minimum input
dB
dB
41
35
51
36
DHW storage tank
DHW storage tank capacity
Temperature and pressure relief valve (factory installed)
Max. allowable operating pressure (DHW)
Storage tank test pressure
Continuous DHW output
Continuous DHW output draw rate *10
Max. DHW draw rate (over 10 min. period) *10
USG (L)
psig/temp
psig
psig
MBH (kW)
GPM (L/min.)
USG (L)
26.5 (100)
150 / 210ºF (99ºC)
150
300
61 (17.8)
1.8 (6.6)
44 (166)
26.5 (100)
150 / 210ºF (99ºC)
150
300
114 (33.4)
3.3 (12.3)
60 (227)
Standby losses *11 BTU/24h
BTU/h
º F/h
4435
184
0.8
4435
184
0.8
*6 Measured flue gas temperature with a combustion air temperature of 68°F (20°C).
*7 Based on typical boiler cycles, including partial load conditions.
*8 Requires 1 inch (25 mm) tubing. See the Installation Instructions of the Vitodens 222-F, B2TB for details.
*9 For side wall vent installations (coaxial system):
Do not exceed max. equivalent length specified in the Installation Instructions of the Vitodens 222-F, B2TB
Venting System.
Do not attempt to common-vent Vitodens 222-F, B2TB with any other appliance.
Side wall coaxial vent installation must include Viessmann protective screen!
For details refer to the Installation Instructions for the Vitodens 222-F, B2TB Venting System.
*10 Based on a temperature rise of 70ºF (21ºC), 50ºF to 120ºF (10ºC to 49ºC).
*11 Measured values are based on room temperature of 68ºF (20ºC) and a domestic hot water temperature of 149ºF (65ºC).
*12 Add 1fin. (40 mm) when using the optional accessory seismic bracket kit.
For information regarding other Viessmann System Technology componentry, please reference documentation
of respective product.
Note: For high altitude installation at 10,000 ft. (3050 m) the input for 222-F, B2TB 19 and 35 will have an altitude
de-ration of 21%.

Vitodens 222-F, B2TB 19 and 35 Technical Data
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Dimensional Information
Models 222-F, B2TB 19 and 35
6
Note: The dimensional drawing shows example fittings for upward connection and connection to the left/right, for
installation on finished walls. Order the connection sets separately as accessories. For the dimensions of the
individual connection sets, see the design information.
Model B2TB 19 and 35 Model B2TB 19 and 35
a *1in. (mm) 46.1 (1172) k *1in. (mm) 65.6 (1665)
b *1in. (mm) 48.3 (1227) l *1in. (mm) 68.0 (1726)
c *1in. (mm) 28 (710) approx. m in. (mm) 16.1 (410)
d *1in. (mm) 52.6 (1337) n in. (mm) 8.8 (224)
f *1in. (mm) 57.0 (1447) o in. (mm) 15.3 (389)
g in. (mm) 2.0 (50) p in. (mm) 14.2 (361)
h *1
in. (mm) 61.5 (1562) q in. (mm) 12.6 (320)
i *1in. (mm) 64.2 (1630) r in. (mm) 13.0 (330)
j *1in. (mm) 65.6 (1666) s in. (mm) 8.7 (220)
Legend
ACondensate Drain (side)
*1
Note: All height dimensions of the boiler have a tolerance of +.6 in. (+15 mm) due to the factory installed adjustable feet
*1 Add 1fin. (40 mm) when using the optional accessory seismic bracket kit.
Note: All height dimensions of the boiler have a tolerance of +.5 in. (+13 mm) due to the seismic bracket adjustable feet.

Vitodens 222-F, B2TB 19 and 35 Technical Data
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5461 888 - 04
Minimum Clearances
7
Recommended Minimum Service Clearances
Minimum Clearances to Combustibles
AL= Alcove
CL= Closet
*1 Refer to the Installation Instructions of the Vitodens
222-F, B2TB Venting System for details.
Note: The Vitodens 222-F, B2TB boiler has passed the
zero inches vent clearance to combustibles testing
requirements dictated by the boiler Harmonized
Standard ANSI Z21.13. CSA 4.9.2012 and
therefore is listed for zero clearance to combustibles
when vented with a single-wall UL/ULC certified
special venting system. The zero inches vent
clearance to combustibles for the Vitodens boiler
supercedes the clearance to combustibles listing
that appears on the special venting system label.
The back or side clearance shall be increased if
piping installation is required.
Top Front Rear Left Right Vent
pipe *1
0 0 AL, CL 0000

Vitodens 222-F, B2TB 19 and 35 Technical Data
5461 888 - 04
8
Waterside Flow
Waterside Flow (primary circuit)
The Vitodens 222-F, B2TB is designed for closed loop,
forced circulation hot water heating systems only. Use
standard friction loss method for pipe sizing. Observe
boiler maximum and minimum flow rate limitations. If
system flow rate exceeds boiler maximum flow rate
(as stated below), falls below the minimum flow rate
or if system flow rate is unknown, Viessmann strongly
recommends the installation of a low-loss header.
An alternative method may be used, such as primary
secondary piping using closely spaced tees.
A low-loss header offers additional benefits not provided
by a pair of closely spaced tees. Viessmann therefore
strongly recommends and prefers the use of a low-loss
header over closely spaced tees. See pages 19 and 20
for low-loss header information. Once the low-loss header
is connected, the built-in low-loss header logic of the
Vitodens 222-F boiler ensures the required t across the
system through the sensory communication between the
low-loss header and the boiler.
Pressure drop (primary circuit) for
Vitodens 222-F, B2TB 19 and 35
Flow rate
Supply head pressure (water)
Boiler maximum flow rate 6.2 GPM (1400 L/h)
Boiler maximum flow rate 6.2 GPM (1400 L/h)
Model B2HB 19 1 boiler
Output (NG/LPG)
MBH 64
t for NG/LPG
20ºF (11ºC) rise GPM (L/h) 6.4 (1453)
25ºF (14ºC) rise GPM (L/h) 5.1 (1163)
30ºF (17ºC) rise GPM (L/h) 4.3 (969)
35ºF (19.5ºC) rise GPM (L/h) 3.7 (830)
40ºF (22ºC) rise GPM (L/h) 3.2 (727)
Model B2HB 35 1 boiler
Output (NG/LPG)
MBH 117
t for NG/LPG
20ºF (11ºC) rise GPM (L/h) 11.7 (2657)
25ºF (14ºC) rise GPM (L/h) 9.4 (2126)
30ºF (17ºC) rise GPM (L/h) 7.8 (1771)
35ºF (19.5ºC) rise GPM (L/h) 6.7 (1518)
40ºF (22ºC) rise GPM (L/h) 5.9 (1328)

Vitodens 222-F, B2TB 19 and 35 Technical Data
9
5461 888 - 04
Pump Information
Heating Circuit
IMPORTANT
Pump selection must be based on accurate system flow
and pressure drop calculations (includes DHW sizing).
Low-Loss Header Application
Sizing of Low-Loss Header in a Residential Single-Boiler Application
*1For system t < 20°F (11ºC) use low-loss header sizes for t 20°F (11ºC).
*2Low-Loss temperature sensor - is included with the boiler for use in single-boiler applications.
Boiler
Model
No. of
Boilers
Boiler
Max.
Flow
Rate
GPM
(L/h)
Typical System Flow Rates Viessmann
Low-loss
Temp.
Sensor
Required*2
t*1 °F
(°C)
20
(11.0)
25
(13.9)
30
(16.8)
35
(16.1)
40
(13.4)
B2TB
19
1 6.2
(1400)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
6.4
(1453)
Yes
80/60
5.1
(1163)
Optional
80/60
4.3
(969)
Optional
80/60
3.7
(830)
Optional
80/60
3.2
(727)
Optional
80/60
included
B2TB
35
1 6.2
(1400)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
11.7
(2657)
Yes
80/60
9.4
(2126)
Yes
80/60
7.8
(1771.6)
Yes
80/60
6.7
(1518)
Yes
80/60
5.9
(1328)
Optional
80/60
included
Note: The Vitodens 222-F comes equipped with a factory preset integrated boiler pump.
Vitodens 222F B2TB 19-35 are equipped with a boiler/
system pump. The system pump flow must be selected
on t. If the system flow exceeds the boiler’s maximum
flow rate , a low-loss header is strongly recommended.

Vitodens 222-F, B2TB 19 and 35 Technical Data
5461 888 - 04
10
Low-Loss Header Information
Heating Circuit Pumps
Pump Model Grundfos UPS15-78
Rated voltage VAC 115
Rated current A max. 1.15
A min. 0.8
Capacitor F8
Power consumption W max. 130
W min. 80
Grundfos UPS15-78 three speed heating circuit/DHW circuit pump for Vitodens 222-F, B2TB boilers
(in the factory setting, the pump speed is preset to ‘speed three’)
Speed One
Speed Three
Speed Two
Flow Q (gpm)
Ft of Head
Performance chart courtesy of Grundfos
Grundfos UPS15-78 residual head pressure
Residual head of built-in three speed pump used with Vitodens 222-F, B2TB
Flow Q (gpm)
Ft of Head

Vitodens 222-F, B2TB 19 and 35 Technical Data
11
5461 888 - 04
DHW Production
Domestic Hot Water Production
A diaphragm expansion tank is integrated into the
Vitodens 222-F, with a capacity of 3.2 USG (12 L) and
a pre-charge pressure of 12 psig.
Determine the required size of the expansion tank to be
installed in the heating system. If the integral expansion
tank is insufficient, install a suitably sized expansion tank
on site.
IMPORTANT
The Vitodens 222-F storage combi-boiler combines
the benefits of the Vitodens 200-W with high DHW
convenience of a separate integral stainless steel DHW
storage tank.
The Vitodens 222-F uses an integrated 26.5 USG (100
L) DHW storage tank and an integrated DHW production
pump.
Domestic Hot Water Recirculation
DHW recirculation lines increase the level of comfort and
convenience of the domestic hot water supply and reduce
water consumption.
These advantages directly derive from the immediate
availability of domestic hot water at all draw points.
Poor insulation of the DHW recirculation line, however,
can result in considerable heat loss. Viessmann therefore
recommends that effective insulation be provided and
used for DHW recirculation lines of 23 ft. (7 m) in length
or longer.

Vitodens 222-F, B2TB 19 and 35 Technical Data
5461 888 - 04
12
Boiler Control
On-Board Vitotronic 200, HO1B Control
Modular structure
The control unit is integrated into the boiler. The control
unit comprises a standard unit, electronics modules and
a programming unit.
Standard unit:
■ON/OFF switch
■Optolink laptop interface
■Operating and fault indicators
■Reset button
■Fuses
Programming unit:
■Easy operation through:
– Plain text display with graphic ability
– Large font and black & white depiction for good
contrast
– Context-sensitive help text
– Removable programming unit; can be mounted
on the wall with separate accessory
■With digital time switch
■Control keys for:
– Navigation
– Confirmation
– Help and additional information
– Menu
■Setting the:
– Room temperature
– Reduced room temperature
– DHW temperature
– Heating program
– Time programs for central heating, DHW heating
and DHW recirculation
– Economy mode
– Party mode
– Holiday program
– Heating curves
– Codes
– Actuator tests
– Test mode
■Displaying the:
– Boiler water temperature
– DHW temperature
– Operating details
– Diagnostic details
– Fault messages

Vitodens 222-F, B2TB 19 and 35 Technical Data
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5461 888 - 04
Frost protection
■The frost protection function will be started when the
outside temperature drops below approx. 34°F (1°C).
With the frost protection function, the heating circuit
pump will be switched ON and the boiler water is
maintained at a lower temperature of approx. 68°F
(20°C).
The DHW tank will be heated to approx. 68°F (20°C).
■The frost protection function will be stopped when the
outside temperature rises above approx. 37°F (3°C)
(default settings).
Summer Operation
Heating program “w”
The burner is only activated upon a call for domestic hot
water from the DHW storage tank (controlled by DHW
tank temperature sensor).
Design and Function
Boiler Control
Control Characteristics
PI characteristics with modulating output.
Time Switch
Digital time switch.
■Individual and 7-day program
■Automatic daylight savings time changeover
■Automatic function for DHW heating and DHW
recirculation pump
■Time, day and standard switching times for space
heating, DHW heating and the DHW recirculation
pump are factory-set
■Switching times are individually programmable,
i.e. up to four switching periods per day
Shortest switching interval: 10 minutes
Power backup: 14 days.
Functions
■Weather-compensated control of the boiler water
and/or supply temperature
■Control of one heating circuit without mixer and two
heating circuits with mixer (with accessory mixing
valve extension modules)
■Demand-dependent heating circuit pump and burner
off control
■Adjustment of a variable heating limit
■Anti-seizing pump protection
■Integral diagnostic system
■Maintenance display
■DHW temperature control with priority
■Auxiliary function for DHW heating (short-term
heating to a higher temperature)
■0-10V External signal input
Setting the Operating Programs
The heating system frost protection (see
frost protection function) applies to all heating programs.
You can select the following heating programs with the
program keys:
■Heating and DHW
■DHW only
■Standby mode
External heating program changeover.

Vitodens 222-F, B2TB 19 and 35 Technical Data
5461 888 - 04
14
Boiler Control
Design and Functions (continued)
Heating Curve Adjustment (slope and shift)
The control unit regulates the boiler water temperature
(= supply temperature of heating circuit without mixing
valve) and the supply temperature of the heating circuit
with mixing valve (in conjunction with the accessory
kit for a heating circuit with mixing valve) according to
the outdoor temperature. The boiler water temperature
is automatically raised by 0 to 72 F / 0 to 40 K higher
than the currently required set supply temperature (in the
factory default setting the differential temperature
is 14.4 F / 8 K). See Service Instructions for coding
address “9F” in coding level 2.
The supply temperature that is required to achieve a
given room temperature depends on the heating system
and the thermal insulation of the building that is being
heated.
The adjustment of the two heating curves is used to
match the boiler water temperature and the supply
temperature to these conditions. The boiler water
temperature is limited upwards by the fixed high limit
and the temperature set for the electronic high limit.
The supply temperature cannot rise above the boiler
water temperature.
Technical Data
Rated supply voltage: 120 VAC
Rated frequency: 60 Hz
Rated current: 12 A
Max. ambient temp.
- at operation: 32 to 104ºF (0 to 40ºC)
Installation in living spaces or
boiler rooms (standard ambient
conditions)
- when storing
or transporting: -4 to +158ºF (-20 to +70ºC)
Max. operating temp.
setting (space heating):
Models B2TB 19 & 35 165ºF (74ºC)
DHW production:
Models B2TB 19 & 35 165ºF (74ºC)
Setting fixed high limit: 210ºF (99ºC)
(not adjustable)
Adjustment range of
DHW tank set-point
temperature: 50 to 154ºF (10 to 68ºC)
Heating curve settings
- Heating curve slope: 0.2 to 3.5
- Heating curve shift: -12 to +33ºC
-13 to 40 K
Legend
ALow temperature heating system,
e.g. radiant floor heating
BMedium temperature heating system,
e.g. cast iron radiation, staple-up radiant floor heating
CHigh temperature heating system,
e.g. fintube radiation, fan coils
Boiler water or supply temperature
Room
set-point
temperature Outdoor temperature

Vitodens 222-F, B2TB 19 and 35 Technical Data
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5461 888 - 04
Sensors (supplied)
Boiler Temperature Sensor
The boiler temperature sensor is connected at the control
unit for weather-responsive operation and is built into the
boiler.
Specification sensor type: Viessmann NTC 10K ohms
at 77ºF (25ºC)
Max. ambient temp.
- at operation: 32 to 266ºF (0 to 130ºC)
- when storing
or transporting: - 4 to+158ºF (-20 to+70ºC)
Outdoor Temperature Sensor
Sensor location:
- North or northwest wall of building
- 6.6 to 8.2 ft. (2 to 2.5 m) above ground or in case
of a multi-storey building approximately halfway up
the second floor
Electrical connection:
- 2-wire cable, max. cable length 115 ft. (35 m)
with a wire size of min. AWG 16 copper
- Cable to the outdoor sensor must not be laid near
line voltage wiring (120/240V)
Max. ambient temp.
- at operation: 32 to 194ºF (0 to 90ºC)
- when storing
or transporting: - 4 to+158ºF (-20 to+70ºC)
DHW Tank Temperature Sensor
- integrated DHW temperature sensor
Accessories
Immersion Temperature Sensor
To capture the low loss temperature
(if the LLH is used)
Specification
Lead length fully wired: 12 ft. (3.75 m),
Permissable ambient temp.
- during operation: 32 to 194°F (0 to 90°C)
- when storing
or transporting: - 4 to+158°F (-20 to+70°C)
Optional Accessories
Supply Temperature Sensor
(strap-on sensor, included with mixing valve actuator
accessory kit),
- when storing
or transporting: -4 to+158°F (-20 to+70ºC)
Installed with a strapping band.
Cable length 19.7 ft. (6 m), ready to plug in.
Max. ambient temp.
- at operation: 32 to 212ºF (0 to 100ºC)
- when storing
or transporting: -4 to+149ºF (-20 to+70ºC)
KM BUS Expansion Module
To connect 2 to 9 devices (mixing valve actuator,
Vitotrol, input module, etc.) to the single KM BUS
connection of the boiler.
Specification
Lead length 10 ft. (3.0 m), fully wired
Permissable ambient temp.
- during operation 32 to 104°F (0 to 40°C)
- during storage and
transport: - 4 to+149°F (-20 to+65°C)

Vitodens 222-F, B2TB 19 and 35 Technical Data
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16
Accessories
Optional Accessories (continued)
Mixing Valve Actuator Kit
The mixing valve actuator is mounted directly on the
Viessmann ¾ to 2½” mixing valve.
The mixing valve actuator is a motor-driven control unit.
The rotational direction is reversible.
Rated voltage: 120 VAC
Rated frequency: 60 Hz
Power consumption: 4W max. ambient temperature
- at operation: 32º F to 104ºF (0º C to 40ºC)
application in living areas and installation sites
(normal ambient conditions)
-storage & shipping: -4º F to 149º F (-20ºC to 65ºC)
Room Temperature Sensor,
Separate room temperature sensor as supplement to the
Vitotrol 200A and 300A; to be used if the Vitotrol 200A
or 300A cannot be installed inside the main living room
or in a suitable position where the unit can capture and
adjust the temperature.
Installation in the main living room on an internal wall
opposite radiators. Never install inside shelf units,
recesses, immediately by a door or heat source
(e.g. direct sunlight, fireplace, TV set, etc.).
Connect the room temperature sensor to the Vitotrol
200A or 300A.
Electrical connection:
- 2-wire cable with a wire size of min. AWG 18 copper
- The cable length between the control unit, remote
control unit and room temperature sensor must not
exceed 98 ft. (30 m)
Max. ambient temp.
- at operation: 32 to 104ºF (0 to 40ºC)
- when storing
or transporting: -4 to+149ºF (-20 to +65ºC)
Mixing Valve Extension Module
Rated voltage: 120 VAC
Rated frequency: 60 Hz
Rated current: 2 A
Power consumption: 4 W
Max. ambient temp.
- at operation: 32 to 104ºF (0 to 40ºC)
- when storing
or transporting: -4 to+149ºF (-20 to+65ºC)
Relay output for
heating circuit pump: 2 A, 120 VAC
Actuator torque: 3 Nm
Time of 90º: 120 seconds
LON Communication Module
Electronic PCB for data exchange with the Vitotronic
200-H, Vitocom 200 and for connecting to a higher level
building management system.
LON Connecting Cable
(for data exchange between control units)
Cable length 23 ft. (7 m), fully wired
LON Terminal End Resistor
To terminate the LON BUS at the first and the last control
unit.

Vitodens 222-F, B2TB 19 and 35 Technical Data
17
5461 888 - 04
Accessories
Optional Accessories (continued)
Connection:
- 2-core lead 18 AWG, length max. 164 ft. (50 m)
(even if connecting
several remote control units)
- Never route this lead immediately next to 120/208/460 V
cables
- LV plug as standard delivery must be installed in the
main living room (lead room).
Specification:
Power supply via KM BUS
Power consumption: 0.2 W
Protection class: III
Max. ambient temp.
- at operation: 32 to 104ºF (0 to 40ºC)
- when storing
or transporting: -4 to+149ºF (-20 to+65ºC)
Set room temp. range 37 to 99ºF (3 to 37ºC)
The set room temperature for reduced mode is adjusted
at the control unit.
Vitotrol 200A
One Vitotrol 200A can be used for every heating circuit
in a heating system. The Vitotrol 200A can regulate one
heating circuit and up to two remote controls may be
connected to the control unit.
KM BUS Participant
The Vitotrol 200A remote control regulates the required
set room temperature in standard mode, from any room
in the house.
- Party and economy mode can be enabled via keys
- Only for heating circuit with mixing valve
Fitted room temperature sensor for room temperature
hook-up
WS function:
Installation anywhere in the building.
RS function:
Note: Never activate the RS function for underfloor
heating circuits (inertia). In heating systems with
a heating circuit without mixing valve and heating
circuits with mixing valve, the RS function must
only affect the heating circuit with mixing valve.
Room temperature hook-up:
Installation in the main living room on an internal wall
opposite radiators. Never install inside shelf units,
recesses, immediately by a door or heat source (e.g.
direct sunlight, fireplace, TV set, etc.).
The integral room temperature sensor captures the actual
room temperature and effects any necessary corrections
of the supply temperature as well as a rapid heat-up
at the start of the heating operation (if appropriately
programmed).

Vitodens 222-F, B2TB 19 and 35 Technical Data
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18
Vitotrol 300A
One Vitotrol 300A can be used for every heating circuit
in a heating system. The Vitotrol 300A can regulate up
to three heating circuits. Up to two remote controls may
be connected to the control unit.
KM BUS Participant
The Vitotrol 300A remote control regulates the required
set room temperature for one heating circuit in standard
and reduced mode, the heating program and the switching
times for central heating, DHW heating and the DHW
recirculation pump.
Displaying:
- Room temperature
- Outside temperature
- Heating program
- Operating condition
- Solar yield as graphic display
Settings:
- Set room temperatures for standard mode
(day temperature) and reduced mode (night temperature)
via the standard display
- Heating program, switching times for heating circuits,
DHW heating and DHW recirculation pump plus further
settings via plain text menu on the display
- Party and economy mode can be enabled via the menu
- Only for heating circuit with mixer:
Fitted room temperature sensor for room temperature
hook-up
Note: For room temperature hook-up, the Vitotrol 300A
must be installed in the main living room (lead room).
RS function:
Installation in the main living room on an internal wall
opposite radiators. Never install inside shelving units,
in recesses, or immediately by a door or heat source
(e.g. direct sunlight, fireplace, TV set, etc.). The fitted
room temperature sensor captures the actual room
temperature and effects any necessary correction of
the flow temperature.
WS function:
Installation anywhere in the building.
Connection:
- 2-core lead 18 AWG, length max. 164 ft. (50 m)
(even if connecting several remote control units)
- Never route this lead immediately next to 120/208/460V
cables
- LV plug as standard delivery must be installed in the main
living room (lead room).
Specification:
Power supply via KM BUS
Power consumption: 0.2 W
Protection class: III
Max. ambient temp.
- at operation: 32 to 104ºF (0 to 40ºC)
- when storing
or transporting: -4 to+149ºF (-20 to+65ºC)
Set room temp. range 37 to 99ºF (3 to 37ºC)
The set room temperature for reduced mode is adjusted
at the control unit.
Optional Accessories (continued)
Accessories

Vitodens 222-F, B2TB 19 and 35 Technical Data
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5461 888 - 04
Accessories
Accessories for Vitodens 222-F
Low-Loss Header
When used in conjunction with the Vitodens 222-F boiler,
the low-loss header acts as hydraulic break, decoupling
boiler and system circuits from each other.
It is recommended to use the low-loss header in
applications in which the total system flow rate exceeds
the maximum (or minimum) boiler flow rate.
For maximum boiler flow rates, starting on page 9 of
this manual.
Viessmann strongly recommends the use of a low-loss
header in cases where the system head and flow rates
are unknown.
The temperature sensor connection [TS] typically located
at the top of the low-loss header ensures low return
temperatures to the Vitodens 222-F boiler at all times,
increasing operational efficiency.
Use only a Viessmann supplied temperature sensor.
Do not use any other manufacturer’s temperature sensor.
In addition, the low-loss header helps eliminate air and
debris [D] from the heating system.
See illustrations for design and principle of operation.
Fuel Conversion Label Kit (NG>LPG)
(included in boiler technical literature set)
The Vitodens 222-F, B2TB boiler comes factory set for
operation with natural gas. All B2TB models can be field
converted to operate with liquid propane gas (as well
as back to natural gas as required). The kit includes
instructions and labels for field conversion.
Legend
AB Air Bleed
BR Boiler Return
BS Boiler Supply
BY Bypass (with laminar flow)
D Debris and/or air
DV Drain Valve
SC Sensor Cable
SR System Return
SS System Supply
TS Viessmann Temperature Sensor
SW Sensor Well
IMPORTANT
Low-loss header design (Typical)

Vitodens 222-F, B2TB 19 and 35 Technical Data
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Accessories
Accessories for Vitodens 222-F
Low-Loss Header (continued)
When installing a low-loss header, the system mixed
supply temperature (T3) must be calculated as follows:
Vprimary < Vsecondary
T1 > T3
T2 = T4
Qprimary = Qsecondary
T1 167° F (75° C)
Vsecondary=Vprimary+Vbypass
IMPORTANT
Model No. Max. system flow rate
Type 80/60 17.6 GPM (4 m3/h)
Type 120/80 35.2 GPM (8 m3/h)
Type 160/80 *1 44 GPM (10 m3/h)
Type 200/120 *180 GPM (18 m3/h)
*1 Floor-mounted version (typically used for
multiple-boiler installations).
Principle of Operation
Legend
T1 Boiler supply temperature
T2 Boiler return temperature
T3 System supply temperature
T4 System return temperature
Vprimary Boiler circuit flow rate
Vsecondary Heating circuit flow rate
Vbypass Bypass flow rate
Qprimary Heat supplied by boiler
Qsecondary Heat consumed by system