Viessmann Vitosol 200-FM SV2F Guide

Solar System Design Guide
6020 457 - 01 06/2019
VITOSOL 200-FM
Product may not be exactly as shown
VITOSOL 200-FM Model SV2F and SH2F
Flat plate solar collectors
For vertical (model SV) or horizontal (model SH) installation on
sloped and flat roofs. For integration on walls (model SH only).
To produce domestic hot water, or to supplement
low-temperature heating systems or swimming pools
via a heat exchanger.
Model SV2F
Model SH2F

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Table of Contents Solar System Design Guide
Solar Energy ..............................................................6
Viessmann Collector Range....................................... 6
Solar Radiation....................................................... 7
Global Radiation ..................................................... 7
Harnessing Solar Energy Using Solar Collectors ......... 8
Parameters for Collectors ......................................... 9
Collector Efficiency ................................................. 9
Collector Thermal Efficiency Calculation .................... 10
Collector Thermal Output Calculation........................ 10
Thermal Capacity................................................... 11
Stagnation Temperature .......................................... 11
System Filling Pressure and Steam-Producing Power.... 11
Solar Coverage ...................................................... 11
Orientation of the Receiver Surface........................... 12
Inclination of the Receiver Surface............................ 12
Avoid Shading of the Receiver Surface...................... 12
Overall System Optimization.................................... 13
Product Description ................................................ 14
Benefits ............................................................... 14
Specification.......................................................... 15
Dimensions........................................................... 16
Approved Quality ................................................... 16
Principles
Vitosol 200-FM, Type SV2F and SH2F
Installation

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Table of Contents
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Solar Control Units ................................................. 17
Solar Control Module SM1 ...................................... 17
Delivered Condition ................................................ 18
Solar Control Unit SCU 124 .................................... 19
Delivered Condition ................................................ 19
Solar Control Unit SCU 224 .................................... 20
Delivered Condition ................................................ 20
Solar Control Unit SCU 345 .................................... 21
Delivered Condition ................................................ 21
Allocation to Solar Control Units .............................. 22
Tank Temperature Limit .......................................... 22
Collector Emergency Shutdown................................ 22
Minimum Collector Temperature Limit ....................... 22
Collector Cooling Function with SCU 124/224/345 ..... 23
Tank Cooling Function with SCU 124/224/345........... 23
Information Regarding the Collector Cooling
and Tank Cooling Functions..................................... 23
Evacuated Tube Collector Function ........................... 24
Frost Protection..................................................... 24
Thermostat Function with Time Switches Solar
Control Module SM1 and SCU 124, 224 and 345 ...... 24
SCU 224 and 345 ∆T Control with
Temperature Limitations ......................................... 25
Speed Control with Solar Control Module SM1 .......... 25
SCU 124/224 Speed Control ................................... 26
SCU 345 Speed Control.......................................... 26
Energy Metering with Solar Control SM1 Module
and SCU 124 and 224 ........................................... 26
SCU 345 Energy Metering ....................................... 26
Verifying Solar Control Energy Calculation ................ 27
Suppression of DHW Tank Reheating by the
Boiler with SCU 124, 224 and 345........................... 27
Suppression of DHW Tank Reheating by the
Boiler with Solar Control Module SM1 ....................... 28
Auxiliary Function for DHW Heating with
Solar Control Module SM1 ...................................... 28
External Heat Exchanger with Solar Control
Module SM1......................................................... 28
External Heat Exchanger with SCU 224/345 .............. 29
Parallel Relay with SCU 345 .................................... 29
Multiple Tank Operation with SCU 224 and 345 ......... 29
Tank Priority Control with SCU 224 and 345.............. 29
Utilization of Excess Heat (Heat Dump)
with SCU 124/224/345 ......................................... 30
Pump Exercise Function with Solar Control
Module SM1......................................................... 30
SD Module with SCU 345 ....................................... 30
Smart Display SD3 ................................................. 30
DL2 Datalogger ..................................................... 31
V40 Flowmeter ..................................................... 31
V40 Flowmeter Technical Data ................................ 32
Solar Control

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Table of Contents
Vitocell 300-W/V, Type EVIA/EVIB EVIA 42 USG (160 L) Technical Data........................ 33
EVIA 53 USG (200 L) Technical Data........................ 33
EVIA 79 USG (300 L) Technical Data........................ 33
EVIB 119 USG (450 L) Technical Data ...................... 33
EVBA 79 USG (300 L) Technical Data....................... 34
EVBB 119 USG (450 L) Technical Data ..................... 34
Vitocell Solar Brass Elbow ...................................... 35
Solar-Divicon and Solar Pump Assembly .................... 36
Solar-Divicon Pump and Electrical Specification........... 37
Solar-Divicon Pump Curves...................................... 38
Manual Air Vent Valve ............................................ 39
Air Separator (with shut-off) .................................... 39
Fast-acting Air Vent Valve (with shut-off) .................. 39
Flexible Insulated Piping .......................................... 39
Slice Kit for Insulated Piping .................................... 40
Connection Set with Locking Ring Fitting ................... 40
Manual Solar Fill Pump ........................................... 40
Mobile Solar Charge Station .................................... 40
Solar Expansion Vessel ........................................... 41
Solar Expansion Vessel Specification......................... 41
Snow Load and Wind Load Zones............................. 42
Distance from the Edge of the Roof ......................... 42
Routing Pipe Work ................................................. 42
Equipotential Bonding/Lightning Protection
of the Solar Thermal System.................................... 42
Thermal Insulation................................................... 43
Solar Supply and Return Lines.................................. 43
Collector Fixing...................................................... 44
Sloped Roof Installation. ......................................... 44
Flat Roof Installation .............................................. 44
Wall Installation..................................................... 44
Required Installation Area (Sloped Roofs)
Vitosol 200-FM, Type SV ........................................ 45
Required Installation Area (Sloped Roofs)
Vitosol 200-FM, Type SH ........................................ 46
Sloped Roof Installation with Roof Brackets
General Information................................................ 47
Sloped Roof Installations for Vitosol 200-FM
Flat-Plate Collectors................................................ 47
Installing the Mounting Frames ................................ 49
Vitosol-FM Flat Plate Collectors (on supports)............ 51
Required Installation Area (Flat Roofs)
Vitosol 200-FM, Type SV ....................................... 53
Required Installation Area (Flat Roofs)
Vitosol 200-FM, Type SH ....................................... 54
Calculating Solar Elevation Heights .......................... 55
Determining the Collector Row Clearance z ................ 56
Required Installation Area (Walls)
Vitosol 200-FM, Type SH ....................................... 57
Vitosol 200-FM Flat Plate Collectors, Type SH
(wall mounting using supports)................................ 58
Vitocell 300-B, Type EVBA/EVBB
Solar Tank Temperature Sensor
Installation Accessories
Design Information

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Table of Contents
Vitosol 200-FM, Type SV and SH Low Flow Operation
(single-sided connection) ......................................... 59
Vitosol 200-FM, Type SV and SH High Flow Operation
(single-sided connection) ......................................... 59
Vitosol 200-FM, Type SV and SH Low Flow Operation
(connection on alternate sides) ................................. 60
Vitosol 200-FM, Type SV and SH High Flow Operation
(connection on alternate sides) ................................. 60
Sizing the Solar Thermal System.............................. 61
Maximum Number of Solar Collectors per
Vitocell Tank ........................................................ 63
General Sizing Guidelines for Domestic Hot Water
Preheat Systems ................................................... 64
Solar Radiation Data for Canada .............................. 64
Solar Radiation Data for U.S.A. ............................... 65
System for Heating DHW........................................ 66
System for DHW Heating and
Central Heating Backup .......................................... 67
Swimming Pool Heating System with
Heat Exchanger and Collectors ................................ 69
Flow Rate in the Collector Array .............................. 71
Flow Rate - Vitosol 200-FM .................................... 72
Pressure Drop of the Solar Thermal System............... 73
Pressure Drop of the Solar Supply and Return Lines ... 73
Pressure Drop of Vitosol 200-FM, Type SV and SH .... 74
Collector Pressure Drops for Vitosol 200-FM
SV2F & SH2F ....................................................... 74
Fluid Velocity........................................................ 75
Fluid Velocity and Pressure Drop (Copper)................. 75
Fluid Velocity and Pressure Drop (Steel).................... 76
Pressure Drop for Commonly Used Valves & Fittings .. 76
Sizing the Circulation Pump .................................... 77
Ventilation............................................................ 78
Stagnation in Solar Thermal Systems ....................... 79
System Fluid Calculator.......................................... 81
Expansion Vessel................................................... 82
System Fluid Expansion Tank Pre-charge
Pressure Calculator ................................................ 83
Recommended System Fluid and
Expansion Tank Pressures....................................... 84
Solar Pressure Relief Valve ..................................... 84
Expansion Tank Quick Sizing Table for
Vitosol 200-FM, Type SV & SH ............................... 85
High Limit Safety Cut-out ....................................... 87
Additional Function for DHW Heating ....................... 87
Connecting the DHW Circulation and
Thermostatic Mixing Valve...................................... 87
Intended Use ........................................................ 89
Recommended Maintenance and Inspection Periods.... 89
Subsidy Programs, Permits and Insurance ................. 90
Glossary............................................................... 91
Vitosol Installation Examples
Design and Operation

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Principles
Together with Viessmann heating systems, solar thermal
systems create an optimum system solution for DHW and
swimming pool heating, central heating backup and other
applications.
This system guide includes a summary of all technical
documents for the required components, as well as
design and sizing information especially for systems for
detached houses. You can obtain a printed Viessmann
manuals from your Viessmann sales consultant or
download it from the Viessmann website (www.
viessmann.ca), where you will also find additional
manuals regarding collector installation, service operation
and maintenance of solar thermal systems.
Viessmann Vitosol 200-FM Flat-plate collectors are
suitable for DHW and swimming pool heating, for central
heating backup, as well as for the generation of process
heat. Our flat plate collectors efficiently convert light into
heat at the absorber which is then used for heating one or
multiple thermal loads.
Flat-plate collectors are easily and safely installed above
and integrated into most residential or commercial roofs.
Increasingly, collectors are also mounted on walls or as
floor standing units (ground mount). Flat-plate collectors
are more affordable than vacuum tube collectors. They
are used for DHW heating systems, swimming pool
heating and for central heating backup.
Flat-plate collectors cannot be mounted flush to flat
roofs, as the glass cover cannot be kept clean simply
through rain, and the venting of the collector would
be more difficult. Vitosol 200-FM, type SH can also
be installed on walls. When installed parallel to a wall
(facing south), on an annual average, approximately 30%
less radiation hits the collector than in installations on
45° supports. If the main period of use falls in spring,
autumn or winter (central heating backup), higher yields
may still be achieved from the collectors, subject to the
prevailing conditions. It should be noted that installation
of solar thermal collectors may be subject to certain legal
requirements. For the rules regarding the implementation
of collector systems, refer to local code requirements in
your area.
Viessmann Collector Range
Solar Energy
Vitosol 200-FM collectors feature ThermProtect, a
unique absorber coating. This coating changes its
optical properties subject to temperature. In the
standard temperature range of the solar thermal system,
the collectors have the same performance values as
conventional solar collectors. As soon as the solar tank
has reached the required heat-up condition, an excess
of solar energy causes the collector temperature to
rise. If the collector absorber temperature exceeds the
switching temperature of 167°F (75°C), the absorber
will automatically adapt thus reducing heat draw-off.
The maximum collector stagnation temperature of 293°F
(145°C) can be reached when the system is at a standstill
and exposed to full sun. When the collector temperature
drops below 167°F (75°C), peak thermal output will
resume as the absorber is no longer in switching mode. In
a solar thermal system with switching flat-plate collectors,
the formation of steam can be safely prevented with
increased system pressures. This helps to protect the
system components (pump, check valves, expansion
vessel, etc.) including the heat transfer medium.
ThermProtect absorber coating improves system reliability
and service life. For economic reasons, the same sizing
rules used for conventional flat-plate collectors apply
to switching collectors. However, due to the reduced
stagnation temperatures, the collector area may be
oversized to achieve higher solar coverage.

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Principles
Solar radiation represents a flow of energy irradiated
uniformly in all directions by the sun. Of that energy,
an output of 429 Btuh/ft2(1.36 kW/m2), the so-called
solar constant, hits the outer earth’s atmosphere.
ADiffused celestial radiation
BDirect solar radiation
CWind, rain, snow, convection
DConvection losses
EConduction losses
FHeat radiation of the absorber
GHeat radiation of the glass cover
HUseful collector output
KReflection
RT Return
S Supply
After penetrating the earth’s atmosphere, the solar
radiation is reduced by reflection, dispersion and
absorption by dust particles and gaseous molecules.
That portion of this radiation which passes unimpeded
through the atmosphere to strike the earth’s surface is
known as direct radiation.
The portion of the solar radiation which is reflected
and/or absorbed by dust particles and gas molecules
and irradiated back strikes the earth’s surface indirectly
is known as diffused radiation.
The total radiation striking the earth’s surface is the
global radiation. e.g. global radiation= direct radiation +
diffused radiation.
In the latitudes of North America, the typical global
radiation under optimum conditions (clear, cloudless sky
at midday) amounts to a maximum of 317 Btuh/ft2
(1000 W/m2).
With most high quality solar thermal collectors, as much
as 75% of this global radiation can be utilized, depending
on the type of collector (flat plate or evacuated tube).
Global Radiation
Legend
Solar Radiation

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Harnessing Solar Energy Using Solar Collectors
Principles
The useful energy which a collector can absorb depends
on several factors. The main factor is the total solar
energy available.
The amount of global energy varies from location to
location (see maps below).
The type of collector, as well as its inclination and
orientation, are also very important (see page 12).
If the solar installation is to be operated economically,
careful dimensioning of the system components is also
essential.
Note: Average mean daily global radiation on a south-facing surface tilted at an angle equal to the latitude of the location.
Btu/ft2/day kWh/m2/day
0 to 317 0 to 1
317 to 634 1 to 2
634 to 951 2 to 3
951 to 1268 3 to 4
1268 to 1585 4 to 5
> 1585 > 5

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Parameters for Collectors
Area designations
– Gross area A
Describes the external dimensions (length x width) of
a collector. It is important when planning the installation
and when calculating the required installation area, as
well as when applying for subsidies.
– Absorber area B
The area of the collector that is selectively coated and
is set into the collector. This is where the sun’s energy
is captured and turned/converted into heat.
– Aperture area C
This is the opening or the area in the collector which
solar energy can pass through such that it reaches the
absorber sheet.
Flat-plate collector aperture area:
Area of collector cover through which solar rays can
enter.
Flat-plate collector
Principles
The efficiency of a collector (see chapter “Specification”
for the relevant collector) specifies the proportion of
insolation hitting the absorber area that can be converted
into usable heat. The efficiency depends, among other
things, on the operating conditions of the collector. The
calculation method is the same for all collector types.
Some of the insolation striking the collectors is “lost”
through reflection and absorption at the glass pane
and through absorber reflection. The ratio between the
insolation striking the collector and the radiation that
is converted into heat on the absorber is used to calculate
the optical efficiency 0.
When the collector heats up, it transfers some of that
heat to the ambient area through thermal conduction of
the collector material, thermal radiation and convection.
These losses are calculated by means of the heat loss
factors k1and k2and the temperature differential
∆T (given in Kelvin) between the absorber and the
surroundings:
Efficiency curves (based on collector absorber areas)
The optical efficiency 0and the heat loss factors
k1and k2together with temperature differential ∆T
and the irradiance Egare sufficient to determine the
efficiency curve. Maximum efficiency is achieved when
the differential between the absorber and ambient
temperature ∆T and the thermal losses are zero. The
higher the collector temperature, the higher the thermal
losses and the lower the efficiency.
Collector Efficiency

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Principles
∆T
Solar Irradiance (W/m2)
200 400 600 800 1000
0°K 382 W 764 W 1146 W 1527 W 1909 W
20°K 156 W 538 W 920 W 1302 W 1684 W
40°K - 272 W 654 W 1036 W 1417 W
60°K - - 346 W 728 W 1110 W
80°K - - - 380 W 762 W
100°K - - - - 373 W
Vitosol 200-FM Thermal Output (Watts)
(based on absorber area of one collector)
Example for Vitosol 200-FM SV2F:
*Calculate the efficiency (based on absorber area)

=0-k1 ·∆T -k2 ·∆T2
EgEg
Where:

0 = 82.3%
k
1 = 4.421 W/(m2K)
k
2 = 0.022 W/(m2K2)
E
g= 1000 W/m2
∆T = (40°C - 20°C) = 20°C

=0.823 -4.421 ·20 -0.022 ·(20)2
1000 1000
= 0.7258 or 72.6% Efficient
Example for 1x Vitosol 200-FM SV2F collector:
*Calculate the output (based on absorber area)
Qt=Eg· Ac· (0-k1 ·∆T -k2 ·∆T2)
EgEg
Where:

0= 82.3%
k1 = 4.421 W/(m2K)
k2 = 0.022 W/(m2K2)
A
c= 2.32 m2
Eg= 1000 W/m2
∆T = (40°C - 20°C) = 20°C
Q
t= 1000 ·2.32 ·(0.823 -4.421 ·20 -0.022 ·(20)2)
1000 1000
Qt= 1684 Watts
Collector Thermal Output Calculation
∆T
Solar Irradiance (W/m2)
200 400 600 800 1000
0°K 82.3% 82.3% 82.3% 82.3% 82.3%
20°K 33.7% 58.0% 66.1% 70.1% 72.6%
40°K - 29.3% 47.0% 55.8% 61.1%
60°K - - 24.9% 39.2% 47.9%
80°K - - - 20.5% 32.9%
100°K - - - - 16.1%
Vitosol 200-FM Collector Efficiency (%)
(based on absorber area)
Collector Thermal Efficiency Calculation

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Thermal Capacity
The thermal capacity in kJ/(m2· K) indicates the amount
of heat absorbed by the collector per m2and degree
Kelvin. This heat is only available to the system to a
limited extent.
Stagnation Temperature
The stagnation temperature is the maximum temperature
that the collector can reach during insolation of 317 Btuh/ft²
(1000 W/m²).
■Vitosol 200-FM, with ThermProtect: Up to 293°F (145°C)
If no heat is drawn from the collector, it will heat up until
it reaches the stagnation temperature. In this state, the
thermal losses are of the same magnitude as the radiation
absorbed (energy in = energy out).
System Filling Pressure and Steam-Producing Power
System filling pressure for Vitosol 200-FM
To prevent steam creation of the solar heat transfer
medium, the system filling pressure of the solar thermal
system must be increased. At the highest point of the
solar thermal system, a pressure of 44 psi (3.0 bar) must
be present (see page 83). The static head of the solar
thermal system, the pressure reserve for ventilation and
the supplement for the difference in height between the
expansion vessel and the safety valve must also be taken
into account when filling the system.
Adjust the pre-charge pressure of the expansion vessel to
match the relevant system configuration. Always adjust
the pre-charge pressure of the expansion vessel before
filling the solar thermal system.
Solar Coverage
The solar coverage rate indicates what percentage of the
energy required annually for DHW applications can be
covered by the solar thermal system.
Designing a solar thermal system always entails finding
a good compromise between yield and solar coverage.
The higher the selected solar coverage, the more
conventional energy is saved.
However, high solar coverage is linked to an excess of
heat in summer. This means a lower average collector
efficiency and consequently lower yields energy in
Btuh/ft2(kWh/m2) absorber area.
Most residential solar DHW systems are sized to achieve
55 to 60% solar coverage.
Most larger commercial solar DHW systems are sized to
achieve 30 to 50% solar coverage.
The maximum solar coverage recommended to avoid
overheating in most DHW systems and pool systems
is 60%.
AConventional sizing for DHW systems in detached
houses
BConventional sizing for large solar thermal systems
Legend
Steam-producing power
The steam-producing power in Btuh/ft² (W/m²) indicates
the maximum power level at which a collector produces
steam during stagnation and transfers it to the system,
when evaporation occurs.
ThermProtect switching flat-plate collectors in solar
thermal systems with higher system pressures will no
longer produce steam. The steam producing power of
such these collectors becomes 0 Btuh/ft² (0 W/m²).
Principles

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Inclination of the receiver surface
The yield of a solar thermal system varies depending
on the inclination and orientation of the collector area.
If the collector installation surface is angled, the angle
of incidence changes, as does the irradiance, and
consequently the amount of energy. This is greatest
when the radiation hits the collector installation surface at
right angles. In our latitudes, this case never arises relative
to the horizontal. Consequently, the inclination of the
receiver surface can optimize the yield. In North America,
a collector installation surface oriented facing South and
angled 35° receives approximately 12% more energy
when compared with a horizontal position.
A common rule of thumb is used when designing a
solar DHW heating system to optimize the year round
production of energy:
Collector inclination = latitude of location.
For combination DHW + space heating supplement
systems, the collectors should be installed at a steeper
angle of inclination to take advantage of lower winter sun
angles and to more effectively shed snow. The rule of
thumb to optimize combination systems:
Collector inclination = latitude of location +15°.
Avoid shading of the collector installation surface
Looking at the installation of a collector facing south,
we recommend that the area between south-east and
south-west is kept free of shading (at an angle towards
the horizon of up to 20°). It should be noted that the
solar system is to operate for longer than 20 years, and
that during this time, for example, trees would grow
substantially.
Avoid Shading of the Receiver Surface
Principles
Orientation of the Receiver Surface
Optimum alignment and inclination
The solar collector provides the highest solar yield over an
annual average when facing due South with an inclination
of approximately 30° to 45° from the horizontal plane.
However, the installation of a solar heating system is
still viable even when the installation deviates quite
significantly from the above (+/- 45° of due South
alignment or with an inclination of 25° to 55° from
the horizontal plane). Greater deviations, for example,
for installation on walls, can be compensated for by a
correspondingly larger collector area.
Solar Energy Yield
a100% d65% g80% j50%
b95% e70% h80% k90%
c95% f65% i50%
Inclination of the Receiver Surface
Collector Inclination Angles:
Summer biased installation = latitude of location -15°
Optimum, year round performance = latitude of location
Winter biased installation = latitude of location +15°

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Installation
A high-quality solar collector cannot by itself guarantee
the optimum operation of a solar installation. This depends
more on the complete system solution as a whole.
Viessmann supplies all the components required for a
solar heating system:
– a control unit that is tailored to the individual solar
heating system,
– a DHW tank incorporating a solar heat exchanger
inside the tank,
– a pre-assembled pump station with all necessary
hydraulic components,design details aimed at
achieving fast-responding control and therefore
maximum yields from the solar heating system.
Overall System Optimization
Correctly designed solar heating systems with well
matched system components can cover 55 to 60% of
the annual energy demand for DHW heating in detached
and semi-detached houses.
Viessmann would be pleased to assist you with the
design of solar heating system. The elements of a typical
solar heating system are shown in the diagram below.
*1 Install at least one air-vent valve (quick-acting air-vent valve or a manual vent valve, at the highest point of the system.
Legend
ASolar collector
BSolar-Divicon (pumping station)
COverflow container
DExpansion tank
ESolar manual filling pump (optional)
FSystem fill manifold valve
GSolar brass elbow comes with sensor well
HSolar storage tank
ITank temperature sensor(field installed)
JAir separator (Solar-Divicon)
KSolar control unit
LCollector temperature sensor(field installed)
MFast air vent, c/w shutoff valve *1
PSystem pressure gauge
RReturn to collector
SSupply from collector

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Product Description
Delivered condition
The Vitosol 200-FM is delivered fully assembled ready to
connect.
Benefits
Vitosol 200-FM, Type SV2F and SH2F
■High performance, premium version flat plate collector,
thanks to unique frame design and highly efficient
ThermProtect coated aluminum absorbers.
■Suitable for many residential or commercial
applications with vertical or horizontal versions
available. Suitable for DHW or pool heating, space
heating applications.
Legend
ASolar glass cover, din. (3.2 mm) thick
BAluminum cover strip in dark blue
CContinuous flexible seal for solar glass cover
DAluminum absorber sheet with ThermProtect coating
EMeander-shaped copper pipe
FMelamine resin foam insulation
GMelamine resin foam insulation
HAluminum frame in dark blue
KAluminum-zinc coated sheet steel back panel
■Attractive appearance with powder coated dark blue
frame, endless glass seal and minimal space between
collectors. No screws or rivets used in frame for clean,
neat finish.
■Rugged, high-quality construction using impact-resistant
low-iron solar glass, copper piping, aluminum absorber
and frame and non-degrading thermal insulation.
■Permanently sealed and high stability through all-around
folded aluminum frame and endless glass seal.
■Universal application on flat, sloped roofs or
freestanding, vertical (model SV) or horizontal (model SH)
orientation. Model SH is suitable for installations on
walls. Connect up to 12 collectors in one array for
commercial or residential systems.
■Fast installation with flexible connection pipes and
quick-connect fittings. Prefabricated collector mounting
hardware ensures easy connection to roofs.
■Maximum system performance and reliability with a full
range of solar system components designed to integrate
seamlessly.
■Quality tested to Solar Keymark testing requirements.
■Certified to the Solar Rating and Certification
Corporation (SRCC) OG-100 Standard.
The main component of the Vitosol 200-FM is the
ThermProtect switching absorber. It ensures high
absorption of solar radiation and low emission of thermal
radiation. When the collector temperature becomes
elevated >167°F (>75°C) the absorber will switch
or transition to a higher rate of thermal emission. The
net result is that the collector will operate at a reduced
temperature as the absorber will be rejecting excess
thermal radiation. The ThermProtect switching absorber
limits the maximum or stagnation temperature of the
collector 293°F (145°C). A meander-shaped copper
pipe, through which the heat transfer medium flows, is
permanently embedded into the absorber.
The heat transfer medium channels the absorber heat
through the copper pipe. The absorber is encased in
a highly insulated collector housing, which minimizes
collector heat losses. The high quality thermal insulation
provides temperature stability and is free from gas
emissions.
The cover consists of low iron tempered solar glass,
thereby reducing reflection losses and making it very
resistant to weather influences.
The glass is set into the one-piece powder-coated
aluminum frame with a continuous profiled seal,
preventing water from penetrating into the collector.
This ensures a long and reliable service life for all internal
components.

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Specification
Vitosol 200-FM, Type SV2F and SH2F
Vitosol 200-FM SV2F SH2F
Gross area ft2(m2) 27.0 (2.51) 27.0 (2.51)
Absorber area ft2(m2) 25.0 (2.32) 25.0 (2.32)
Aperture area *1ft2(m2) 25.1 (2.33) 25.1 (2.33)
Spacing between collectors in. (mm) ¾ (21) ¾ (21)
Dimensions*2
Width
Height
Depth
in. (mm)
in. (mm)
in. (mm)
41¾ (1056)
93¾ (2380)
3½ (90)
93¾ (2380)
41¾ (1056)
3½ (90)
Collector performance based on Absorber Area
Optical efficiency
Heat loss coefficient U1
Heat loss coefficient U2
%
W/(m2. K)
W/(m2.K2)
82.3
4.421
0.022
82.6
4.380
0.037
Collector performance based on Gross Area
Optical efficiency
Heat loss coefficient U1
Heat loss coefficient U2
%
W/(m2. K)
W/(m2.K2)
75.7
4.069
0.020
76.0
4.031
0.034
Thermal capacity kJ/(m2.K) 4.89 5.96
Weight (dry) lb (kg) 86 (39) 88 (40)
Fluid capacity
(heat transfer medium)
USG
(L)
0.48
(1.83)
0.63
(2.40)
Maximum working pressure*3psig (bar) 87 (6) 87 (6)
Maximum stagnation temperature*4°F (°C) 293 (145) 293 (145)
Connection in. (mm) ¾ (22) ¾ (22)
Requirements for installation surface and
anchorage
Roof construction with adequate load capacity
for prevailing wind forces
Mechanical test load
Max. tested positive load
Max. tested negative load
lb/ft2(Pa)
lb/ft2(Pa)
73.1 (3500)
62.7 (3000)
73.1 (3500)
62.7 (3000)
*1Important for system design considerations.
*2Dimensions rounded to the nearest ¼ inch.
*3In sealed systems, operating pressure of at least 44 psig + 0.45 psig x static head (ft.)
(3.0 bar + 0.1 bar x static head (m) must be present in the collectors in cold condition.
*4The stagnation temperature is the temperature which applies to the hottest point of the collector at a global
radiation intensity of3412 Btu/h / 1000 W when no heat is conducted by the heat transfer medium.

Solar System Design Guide
6020 457 - 01
16
Vitosol 200-FM, Type SV2F and SH2F
Dimensions
Vitosol 200-FM, Type SH (Horizontal mounting)
Tested in accordance with Solar KEYMARK, EN 12975,
and SRCC 0G-100.
Vitosol 200-FM, Type SV (Vertical mounting)
Approved Quality
For a complete list of certified collectors and
pre-engineered solar packages, please scan the QR code
below or visit Solar Rating & Certification Corporation
website at: www.solar-rating.org

Solar System Design Guide
17
6020 457 - 01
Solar Control Units
Solar control module, type SM1 SCU 124 and 224 SCU 345
An external extension module for
the Viessmann Vitotronic control
based on a wall mountable
casing.
– Electronic temperature
differential control for dual
mode DHW heating and central
heating backup from solar
collectors in conjunction with
a Viessmann boiler
– Control and display via the
Vitotronic boiler control unit
Electronic temperature differential
controller for systems with dual
mode DHW heating with solar
collectors and boilers
Electronic temperature differential controller
for up to three consumers for the following
systems with solar collectors and boilers:
– Dual mode DHW heating with dual mode
DHW tanks or several tanks
– Dual mode DHW and swimming pool
heating
– Dual mode DHW heating and central
heating backup
– Industrial/commercial heating systems
Functions
■With output statement and diagnostic system.
■Operation and display via the Viessmann Vitotronic
boiler control unit.
■Switching the solar circuit pump.
■Heating of two consumers via a collector array.
■Second temperature differential controller.
■Thermostat function for reheating or utilizing excess heat.
■Suppression of DHW tank reheating by the boiler,
subject to solar yield.
■Suppression of reheating for central heating by the heat
source in the case of central heating backup.
■Heat-up of the solar preheating stage for 79 USG
(300 L) or 119 USG (450 L) dual coil DHW tanks.
■Collector safety shutdown.
■Electronic temperature limitation in the DHW tank.
■Order extra immersion temperature sensors, if the
following functions are required:
■For DHW circulation diversion in systems with two
DHW tanks.
■For return changeover between the heat generator
and the heating water buffer tank.
■For heating additional thermal loads
Solar Control Module SM1
Solar Control

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6020 457 - 01
18
Solar Control
Solar Control Module SM1 (continued)
Collector temperature sensor
For connection inside the module.
On-site extension of the connecting lead:
– 2-core copper lead, cable length up to 197 ft. (60 m)
AWG 15-16 [cross-section of 0.00233 in2 (1.5 mm2)]
– Never route this lead immediately next to 120/240VAC
cables
– Solar control module, type SM1
– 1 x collector temperature sensor (NTC 20 K)
– 1 x tank temperature sensor (NTC 10 K)
Specification
Delivered Condition
Construction
The solar control module contains:
- PCB
- Terminals:
- 4 sensor inputs
- Solar circuit pump output
- 1 relay for switching an injection pump or motorized
valve
- KM BUS connectivity
- Power supply (on-site ON/OFF switch)
Cable length 8.2 ft. (2.5 m)
Sensor type Viessmann NTC 20 kΩ,
at 77°F ( 25°C)
Permissible ambient temperature:
– During operation −4 to +392°F
(−20 to +200°C)
– During storage and transport −4 to +158°F
(−20 to +70°C)
Tank temperature sensor
For connection inside the module.
On-site extension of the connecting lead:
– 2-core lead, length max. 197 ft. (60 m)
AWG 15-16 [cross-section of 0.00233 in2 (1.5 mm2)]
– Never route this lead immediately next to 120/240VAC
cables
Cable length 12.3 ft. (3.75 m)
Sensor type Viessmann NTC 10 kΩ,
at 77°F (25°C)
Permissible ambient temperature
– During operation 32 to +190°F
(0 to +90°C)
– During storage and transport −4 to +158°F
(−20 to +70°C)
For systems with Viessmann DHW tanks, the SM1 tank
temperature sensor is installed in the solar brass elbow
(standard delivery or accessory for the respective DHW
tank) in the heating water return.
Rated voltage 120 V~
Rated frequency 60 Hz
Rated current 2 A
Power consumption 1.5 W
Safety category I
Permissible ambient temperature:
– During operation 32 to 104°F ( 0 to +40°C)
use in the living space or
boiler room (standard
ambient conditions)
– During storage and transport −4 to +150°F
(−20 to +65°C)
Rated relay output breaking capacity:
– Semi-conductor relay 1 (1) A, 120 V~
– Relay 2 1 (1) A, 120 V~
– Total max. 2 A

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19
6020 457 - 01
Solar Control Unit SCU 124
Construction
The control unit comprises:
– PCB
– LCD
– Selector keys
– Connection terminals:
– 4x Sensor inputs
– 2x Relay outputs for actuating pumps and valves
– VBus connectivity
– Power supply (on-site ON/OFF switch)
– 2x Variable speed outputs for controlling the solar
circuit pump
The standard delivery includes 1x collector temperature
sensor, 2x tank temperature sensors
Functions
■3 basic system layouts
■Switching the solar circuit pump for DHW and/or
swimming pool heating or space heating
■Electronic limiter for the temperature in the DHW tank
(safety shutdown at 194°F (90°C)
■Collector safety shutdown and collector cooling
■Control of 1 storage tank/thermal load
■Operating hour counter for relays
■Energy metering
■Thermostat function
■Heat dump function
For further functions, see page 22.
– SCU 124
– 1x collector temperature sensor (FKP6)
– 2x tank temperature sensors (FRP6)
Collector temperature sensor (FKP6)
For connection inside the control.
On-site extension of the connecting lead:
– 2-core copper lead, cable length up to 197 ft. (60 m)
AWG 15-16 [cross-section of 0.00233 in2 (1.5 mm2)]
– Never route this lead immediately next to 120/240V cables
Cable length 5 ft. (1.5 m)
Sensor type PT1000
Permissible ambient temperature
– during operation −58 to 356°F
(−50 to +180°C)
– during storage and transport −4 to +158°F
(−20 to +70°C)
Delivered Condition
For systems with Viessmann DHW tanks, the tank
temperature sensor is installed in the solar brass elbow
located in the heating water return (see page 35).
Specifications
Rated voltage 100−240 VAC
Rated frequency 50−60 Hz
Rated current 4A
Power consumption 2W (in standby mode 0.7 W)
Safety category II
Permissible ambient temperature:
– during operation 32 to 104°F
(0 to +40°C)
for use in the living space
or boiler room
– during storage and transport −4 to +150°F
(−20 to +65°C)
Rated relay output breaking capacity:
– Semi-conductor relay 1 1 A 100−240 VAC
– Semi-conductor relay 2 1 A 100−240 VAC
– Total max. 2A
Tank temperature sensor (FRP6)
For connection inside the control.
On-site extension of the connecting lead:
– 2-core lead, cable length up to 197 ft. (60 m)
AWG 15-16 [cross-section of 0.00233 in2 (1.5 mm2)]
– Never route this lead immediately next to 120/240V cables
Cable length 8.2 ft. (2.5 m)
Sensor type PT1000
Permissible ambient temperature:
– during operation 23 to +176°F
(−5 to +80°C)
– during storage and transport −4 to +158°F
(−20 to +70°C)
Solar Control

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6020 457 - 01
20
Solar Control Unit SCU 224
Construction
The control unit comprises:
– PCB
– LCD
– Selector keys
– Connection terminals:
– 4x Sensor inputs
– 2x Relay outputs for actuating pumps and valves
– VBus connectivity
– Power supply (on-site ON/OFF switch)
– 2x Variable speed outputs for controlling the solar
circuit pump and auxiliary pump or valve
The standard delivery includes 2x collector temperature
sensors, 2x tank temperature sensors
Functions
■10 basic system layouts
■Control of 2 collector fields
■Control of 2 storage tanks (thermal loads)
■Heat dump function
■Switching the solar circuit pump for DHW and/or
swimming pool heating
■Electronic limiter for the temperature in the DHW tank
(safety shutdown at 194°F (90°C)
■Collector safety shutdown and collector coding
■Operating hour counter for relays
■Energy metering
■Thermostat function
For further functions, see page 22.
– SCU 224
– 2x collector temperature sensors (FKP6)
– 2x tank temperature sensors (FRP6)
Delivered Condition
For systems with Viessmann DHW tanks, the tank
temperature sensor is installed in the solar brass elbow
located in the heating water return (see page 35).
Specifications
Rated voltage 100−240 VAC
Rated frequency 50−60 Hz
Rated current 4A
Power consumption 2W (in standby mode 0.7 W)
Safety category II
Permissible ambient temperature:
– during operation 32 to 104°F
(0 to +40°C)
for use in the living space
or boiler room
– during storage and transport −4 to 150°F
(−20 to +65°C)
Rated relay output breaking capacity:
– Semi-conductor relay 1 1 A 100−240 VAC
– Semi-conductor relay 2 1 A 100−240 VAC
– Total max. 2A
Collector temperature sensor (FKP6)
For connection inside the control.
On-site extension of the connecting lead:
– 2-core copper lead, cable length up to 197 ft. (60 m)
AWG 15-16 [cross-section of 0.00233 in2 (1.5 mm2)]
– Never route this lead immediately next to 120/240V cables
Cable length 5 ft. (1.5 m)
Sensor type PT1000
Permissible ambient temperature
– during operation −58 to 356°F
(−50 to +180°C)
– during storage and transport −4 to +158°F
(−20 to +70°C)
Tank temperature sensor (FRP6)
For connection inside the control.
On-site extension of the connecting lead:
– 2-core lead, cable length up to 197 ft. (60 m)
AWG 15-16 [cross-section of 0.00233 in2 (1.5 mm2)]
– Never route this lead immediately next to 120/240V cables
Cable length 8.2 ft. (2.5 m)
Sensor type PT1000
Permissible ambient temperature:
– during operation 23 to +176°F
(−5 to +80°C)
– during storage and transport −4 to +158°F
(−20 to +70°C)
Solar Control