Viessmann VITOSOL 200-FM SV2F Design Manual
Flat plate solar collectors
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Solar System Design Guide
VITOSOL 200-FM
Model SH2F
Model SV2F
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.
6020 457 - 01
06/2019
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Summary of Contents for Viessmann VITOSOL 200-FM SV2F
- Page 1 Solar System Design Guide VITOSOL 200-FM Model SH2F Model SV2F 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.
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Page 2: Table Of Contents
Table of Contents Solar System Design Guide Page Principles 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 .... - Page 3 Table of Contents Solar System Design Guide Page Solar Control 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 ..........
- Page 4 Table of Contents Solar System Design Guide Page 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 Vitocell 300-B, Type EVBA/EVBB EVBA 79 USG (300 L) Technical Data .......
- Page 5 Table of Contents Solar System Design Guide Page Vitosol Installation Examples 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) .........
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Page 6: Solar Energy
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. -
Page 7: Solar Radiation
Principles Solar System Design Guide Solar Radiation Solar radiation represents a flow of energy irradiated uniformly in all directions by the sun. Of that energy, an output of 429 Btuh/ft (1.36 kW/m ), the so-called solar constant, hits the outer earth’s atmosphere. Legend A Diffused celestial radiation B Direct solar radiation... -
Page 8: Harnessing Solar Energy Using Solar Collectors
Principles Solar System Design Guide Harnessing Solar Energy Using Solar Collectors The type of collector, as well as its inclination and The useful energy which a collector can absorb depends orientation, are also very important (see page 12). on several factors. The main factor is the total solar If the solar installation is to be operated economically, energy available. -
Page 9: Parameters For Collectors
Principles Solar System Design Guide 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. –... -
Page 10: Collector Thermal Efficiency Calculation
100°K 16.1% = 0.7258 or 72.6% Efficient Collector Thermal Output Calculation Example for 1x Vitosol 200-FM SV2F collector: Vitosol 200-FM Thermal Output (Watts) *Calculate the output (based on absorber area) (based on absorber area of one collector) · ∆T - k ·... -
Page 11: Thermal Capacity
Principles Solar System Design Guide Thermal Capacity The thermal capacity in kJ/(m · K) indicates the amount of heat absorbed by the collector per m and 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... -
Page 12: Orientation Of The Receiver Surface
Principles Solar System Design Guide 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°... -
Page 13: Overall System Optimization
Viessmann supplies all the components required for a and semi-detached houses. solar heating system: Viessmann would be pleased to assist you with the – a control unit that is tailored to the individual solar design of solar heating system. The elements of a typical heating system, solar heating system are shown in the diagram below. -
Page 14: Product Description
Vitosol 200-FM, Type SV2F and SH2F Solar System Design Guide Product Description 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. -
Page 15: Specification
Vitosol 200-FM, Type SV2F and SH2F Solar System Design Guide Specification Vitosol 200-FM SV2F SH2F Gross area 27.0 (2.51) 27.0 (2.51) Absorber area 25.0 (2.32) 25.0 (2.32) Aperture area *1 25.1 (2.33) 25.1 (2.33) Spacing between collectors in. (mm) ¾ (21) ¾... -
Page 16: Dimensions
Vitosol 200-FM, Type SV2F and SH2F Solar System Design Guide Dimensions Vitosol 200-FM, Type SV (Vertical mounting) Vitosol 200-FM, Type SH (Horizontal mounting) Approved Quality Tested in accordance with Solar KEYMARK, EN 12975, For a complete list of certified collectors and and SRCC 0G-100. -
Page 17: Solar Control
Vitotronic boiler control unit Solar Control Module SM1 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. -
Page 18: Delivered Condition
(−20 to +70°C) use in the living space or boiler room (standard For systems with Viessmann DHW tanks, the SM1 tank ambient conditions) temperature sensor is installed in the solar brass elbow (standard delivery or accessory for the respective DHW –... -
Page 19: Solar Control Unit Scu 124
23 to +176°F For further functions, see page 22. (−5 to +80°C) For systems with Viessmann DHW tanks, the tank – during storage and transport −4 to +158°F temperature sensor is installed in the solar brass elbow (−20 to +70°C) located in the heating water return (see page 35). -
Page 20: Solar Control Unit Scu 224
23 to +176°F For further functions, see page 22. (−5 to +80°C) For systems with Viessmann DHW tanks, the tank – during storage and transport −4 to +158°F temperature sensor is installed in the solar brass elbow (−20 to +70°C) located in the heating water return (see page 35). -
Page 21: Solar Control Unit Scu 345
For further functions, see page 22. – during operation 23 to +176°F (−5 to +80°C) For systems with Viessmann DHW tanks, the tank – during storage and transport −4 to +158°F temperature sensor is installed in the solar brass elbow (−20 to +70°C) located in the heating water return (see page 35). -
Page 22: Allocation To Solar Control Units
Solar Control Solar System Design Guide Allocation to Solar Control Units Function Solar control module SM1 SCU 124 SCU 224 SCU 345 Tank temperature limit Collector cooling function Tank cooling function Collector emergency shutdown Minimum collector temperature limit Evacuated tube collector function Frost protection function Thermostat function Variable speed pump operation via PWM... -
Page 23: Collector Cooling Function With Scu 124/224/345
Solar Control Solar System Design Guide Collector Cooling Function with SCU 124 / 224 / 345 The solar circuit pump will be switched off when the maximum tank temperature is reached. The control will allow the collector temperature to increase until it reaches a user defined temperature. -
Page 24: Evacuated Tube Collector Function
This function can be used for any collector type with improperly located collector sensor. Frost Protection If Viessmann collectors are filled with Tyfocor HTL heat transfer medium, this feature may not need to be enabled. Activate the frost protection feature if one of the... -
Page 25: Scu 224 And 345 ∆T Control With Temperature Limitations
Solar Control Solar System Design Guide SCU 224 and 345 ∆T Control with Temperature Limitations This function is used for loading or unloading tanks. The control will monitor both tanks to see if there is usable heat that can be utilized. The control has 3 sets of criteria that must be achieved before the heat exchange will occur. -
Page 26: Scu 124/224 Speed Control
Solar Control Solar System Design Guide SCU 124/ 224 Speed Control The variable speed control is disabled in the factory default condition. It can be enabled for relay output R1 and R2. Possible pumps: – Standard solar pumps with and without their own speed control –... -
Page 27: Verifying Solar Control Energy Calculation
DHW Tank Sensors − − Legend Systems with Viessmann Solar Control Units SCU 124, A Solar control unit wiring terminals SCU 224 & SCU 345 B External Relay (field supplied) Reheating of the DHW tank by the boiler will be C Resistor 20 Ω, 0.25 W (field supplied) -
Page 28: Suppression Of Dhw Tank Reheating By The Boiler With Solar Control Module Sm1
For detailed information see chapter “Auxiliary function for DHW heating”. Only possible in conjunction with Vitotronic control units with KM BUS. Control units from the current Viessmann product range are equipped with the necessary software. Boiler control unit settings: ■ The set DHW temperature 2 must be encoded ■... -
Page 29: External Heat Exchanger With Scu 224/345
Solar Control Solar System Design Guide External Heat Exchanger with SCU 224 and 345 Option #1: The DHW tank is heated via the heat exchanger. The primary pump P1 operates based on the temperature differential between S1 and S2. Secondary pump P2 starts in parallel with solar circuit pump P1. -
Page 30: Utilization Of Excess Heat (Heat Dump) With Scu 124/224/345
Solar Control Solar System Design Guide Utilization of Excess Heat (Heat Dump) with SCU 124 / 224 / 345 In systems with several storage tanks or thermal loads. A heat dump can be selected to be heated only after all other storage tanks or thermal loads have reached their maximum set value. -
Page 31: Dl2 Datalogger
Solar Control Solar System Design Guide DL2 Datalogger Enables the acquisition and storage of large amounts of data (solar sensors, relay outputs, energy metering) and storage over a long period of time. The DL2 can be configured and read out with a standard internet browser via integrated web interface. -
Page 32: V40 Flowmeter Technical Data
Solar Control Solar System Design Guide V40 Flowmeter Technical Data Flowmeter Sizing Three flowmeter kit sizes available; flow meter must be sized to match the maximum or peak flow rate of the solar thermal system. Flowmeter Model V40-06 V40-15 V40-25 Minimum flow rate 0.1 USG/min 0.3 USG/min... -
Page 33: Evia 42 Usg (160 L) Technical Data
Vitocell 300-W/V, EVIA/EVIB Solar System Design Guide Technical Data - Vitocell 300 Series Refer to the Technical Data Manual for detailed Legend information on sizing and performance parameters A Inspection and cleaning opening for the Vitocell domestic hot water storage tanks. B Stainless steel cylinder C Highly effective all-round thermal insulation D Indirect coil made from stainless steel... -
Page 34: Evba 79 Usg (300 L) Technical Data
Vitocell 300-B, EVBA/EVBB Solar System Design Guide Technical Data - Vitocell 300 Series Refer to the Technical Data Manual for detailed information on sizing and performance parameters for the Vitocell domestic hot water storage tanks. Legend A Upper inspection and cleaning opening B Stainless steel cylinder C Upper indirect coil –... -
Page 35: Vitocell Solar Brass Elbow
Solar Tank Temperature Sensor Solar System Design Guide Vitocell Solar Brass Elbow Vitocell tank temperature sensor installation location for Vitocell tank temperature sensor installation location for solar heating applications 42 – 79 USG (160 – 300 L). solar heating applications 119 USG (450 L). Position the solar brass elbow with integrated sensor well Position the solar brass elbow with integrated sensor well in the solar glycol return line (lower coil) which returns to... -
Page 36: Solar-Divicon And Solar Pump Assembly
Multiple-speed pumps which can be matched to the system are the most suitable. To simplify the installation and selection of the pumps and safety equipment, Viessmann supplies the Solar-Divicon. The Solar-Divicon comprises ■ pre-assembled and sealed valves and safety assembly, ■... -
Page 37: Solar-Divicon Pump And Electrical Specification
Installation Accessories Solar System Design Guide Solar-Divicon Pump and Electrical Specification Pump Electrical Details Solar-Divicon DN20B Solar-Divicon DN25B Model Wilo Star S21 U-15-130 Wilo Star S30 U-25-180 Voltage 115 Vac 115 Vac Phase 1 Ph 1 Ph Frequency 60 Hz 60 Hz Speed #1 42 Watts... -
Page 38: Solar-Divicon Pump Curves
Installation Accessories Solar System Design Guide Solar-Divicon Pump Curves Solar-Divicon DN20B Solar-Divicon DN25B Refer to the Solar-Divicon Installation and Service Instructions Manual for detailed information on sizing, installation and performance parameters. -
Page 39: Manual Air Vent Valve
Installation Accessories Solar System Design Guide Manual Air Vent Valve Locking ring fitting with manual air vent valve. For installation at the highest point of the system. Can be used as an alternative to a fast acting air vent. Air Separator (with shut-off) Installation in the supply pipe of the solar circuit, preferably upstream of the inlet into the DHW tank. -
Page 40: Slice Kit For Insulated Piping
Installation Accessories Solar System Design Guide Splice Kit for Insulated Piping For splicing together flexible stainless steel piping: – 2 pipe sleeves – 8 O-rings – 4 pipe support rings – 4 profile clips Connection Set with Locking Ring Fitting For joining the flexible stainless steel piping to Copper type-L of the solar thermal system: –... -
Page 41: Solar Expansion Vessel
Installation Accessories Solar System Design Guide Solar Expansion Vessel Layout and function A solar expansion vessel is a sealed unvented vessel where the gas space (nitrogen charge) is separated from the space containing liquid (heat transfer medium) by a diaphragm; the pre-charge pressure is subject to the system height. -
Page 42: Snow Load And Wind Load Zones
Design Information Solar System Design Guide Snow Load and Wind Load Zones The collectors and the fixing system must be designed in such a way that they can withstand any snow and wind loads that may occur. Distance from the Edge of the Roof Observe the following for installation on pitched roofs: –... -
Page 43: Thermal Insulation
Viessmann recommends using 95/5 Tin/Antimony. This soft solder becomes a liquid around 464 °F (240 °C) and will solidify around 452 °F (233°C). Metal sealing connections, locking ring fittings or Viessmann push-fit connections with double O-rings are the most suitable connection option. -
Page 44: Collector Fixing
Viessmann offers universal fixing systems to simplify installation. These fixing systems are suitable for virtually any form of roof and roof cover as well as for installation on flat roofs and walls. -
Page 45: Required Installation Area (Sloped Roofs) Vitosol 200-Fm, Type Sv
Required Installation Area (Sloped Roofs) - Vitosol 200-FM, Type SV For vertical collectors installed between 10° - 80° degrees from the horizontal plane (ground) Slope Roof Installation Vitosol 200-FM SV2F Array Dimensions Collector Array Weight (Collectors, racking, fittings & fluid) Dimension "a"... -
Page 46: Required Installation Area (Sloped Roofs) Vitosol 200-Fm, Type Sh
Design Information Solar System Design Guide Required Installation Area (Sloped Roofs) - Vitosol 200-FM, Type SH For horizontal collectors installed between 10° - 80° degrees from the horizontal plane (ground) Slope Roof Installation Vitosol 200-FM SH2F Array Dimensions Collector Array Weight (Collectors, racking, fittings &... -
Page 47: Sloped Roof Installation With Roof Brackets General Information
Design Information Solar System Design Guide Sloped Roof Installation with Roof Brackets General Information H This fixing system can be used for shingled or slate roofs. H The fixing system comprises roof brackets, mounting rails, clamping brackets and screws. H Forces are applied to the roof structure in various ways, including via the roof brackets and the slate cover. - Page 48 A Clamping brackets with hole size Ø 5/16 in. (Ø 9 mm). It is recommended that a min. of 4 clamping brackets are required per support rail E (clamping brackets are ordered separately from Viessmann) B Collector C Mounting rail...
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Page 49: Installing The Mounting Frames
Design Information Solar System Design Guide Installing the Mounting Frames (continued) Installation dimensions for Vitosol 200-FM, Type SV (vertical collectors) Dimensions for model SV collectors Dimension Dimension Dimension Dimension Dimension Dimension Dimension Dimension Number of Collectors (mm) (mm) (mm) (mm) (mm) (mm) (mm) - Page 50 Design Information Solar System Design Guide Installing the Mounting Frames (continued) Installation dimensions for Vitosol 200-FM, Type SH (horizontal collectors) Dimensions for model SH collectors Dimension Dimension Dimension Dimension Dimension Dimension Dimension Dimension Number of Collectors (mm) (mm) (mm) (mm) (mm) (mm) (mm)
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Page 51: Vitosol-Fm Flat Plate Collectors (On Supports)
Design Information Solar System Design Guide Vitosol 200-FM Flat-Plate Collectors (on supports) Viessmann offers adjustable collector supports for fixing Refer to the Vitosol-FM Installation, Operating the collectors: and Service Instructions for all mounting hardware dimensions and detailed installation — With a variable angle of inclination [snow loads up to instructions. - Page 52 Design Information Solar System Design Guide Vitosol 200-FM Flat-Plate Collectors (on supports) (continued) Collector support base rail (Type SH) Type SH — angle of inclination α 50 to 80° Dimensions: 3 in. (80 mm) 3 in. (75 mm) Ø 0.4 in. (11 mm) 2 in.
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Page 53: Required Installation Area (Flat Roofs) Vitosol 200-Fm, Type Sv
* Only one pair of mounting crossbars are supplied for 1 to 6 collectors, two pairs of mounting crossbars are supplied for 7 to 10 collectors. Vitosol 200-FM SV2F Array Dimensions Flat Roof Installation Collector Array Weight Mounting Frame Spacing Overall Length of Array (Collectors, racking, fittings &... -
Page 54: Required Installation Area (Flat Roofs) Vitosol 200-Fm, Type Sh
Design Information Solar System Design Guide Required Installation Area (Flat Roofs) - Vitosol 200-FM, Type SH For horizontal collectors installed between 25° - 80° degrees from the horizontal plane (ground) * Only one pair of mounting crossbars are supplied for 1 to 6 collectors, two pairs of mounting crossbars are supplied for 7 to 10 collectors. -
Page 55: Calculating Solar Elevation Heights
Design Information Solar System Design Guide Calculating Solar Elevation Height Solar elevation height can be easily calculated using the formulas below and the latitude for the location (see tables attached below): Summer Solstice = 90° - Latitude + 23.45° Spring Equinox = 90° - Latitude + 0° Fall Equinox = 90°... -
Page 56: Determining The Collector Row Clearance Z
2380 mm sin (180°- (45°+ 23.5°)) =(90° - 23.5°) - Latitude sin 23.5° z= 2380 mm sin 111.5° sin 23.5° z= 218.6 in. (5553 mm) Note: Contact Viessmann Solar Tech Support for assistance with calculating distance “z”. -
Page 57: Required Installation Area (Walls) Vitosol 200-Fm, Type Sh
Design Information Solar System Design Guide Required Installation Area (Walls) - Vitosol 200-FM, Type SH For horizontal collectors installed between 45° - 80° degrees from the horizontal plane (ground) Vitosol 200-FM SH2F Array Dimensions Collector Array Weight (Collectors, racking, fittings & fluid) Mounting Frame Spacing Overall Length of Array Dimensions... -
Page 58: Vitosol 200-Fm Flat Plate Collectors, Type Sh
Design Information Solar System Design Guide Vitosol 200-FM Flat Plate Collectors, Type SH (wall mounting using supports) The collector supports are pre-assembled. They consist of a base rail, a collector support and adjustable supports. The adjustable supports contain holes for adjusting the angle of inclination. -
Page 59: Vitosol Installation Examples
Vitosol Installation Examples Solar System Design Guide Vitosol 200-FM, Type SV and SH Low Flow Operation (single-sided connection) Single array less than or equal to ( ) 8x flat plate collectors Legend A Collector temperature sensor (field installed) Vitosol 200-FM, Type SV and SH High Flow Operation (single-sided connection) ... -
Page 60: Vitosol 200-Fm, Type Sv And Sh Low Flow Operation
Vitosol Installation Examples Solar System Design Guide Vitosol 200-FM, Type SV and SH Low Flow Operation (connection on alternate sides) Single array less than or equal to ( ) 10x flat plate collectors Legend A Collector temperature sensor (field installed) Vitosol 200-FM, Type SV and SH High Flow Operation (connection on alternate sides) ... -
Page 61: Design And Operation
Viessmann provides solar design services and will be DHW tanks over a longer period of time to aid the system happy to provide solar simulations for your project. - Page 62 Design and Operation Solar System Design Guide Sizing the Solar Thermal System (continued) Domestic hot water pre-heat systems Calculation example for Vitosol 200-FM Solar thermal systems have the ability to considerably Number of days per month: ....30 days in June reduce the energy requirements of the backup heat Number of people in the home: ........4 generator, assuming that the building has a constant daily...
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Page 63: Maximum Number Of Solar Collectors Per Vitocell Tank
Design and Operation Solar System Design Guide Sizing the Solar Thermal System (continued) Solar storage tank requirements Fossil fuel fired DHW heaters can turn on and heat water when there is a demand, and off when there is not. Solar water heaters however must collect energy when the insolation is available, and store the energy for when there is a demand. -
Page 64: General Sizing Guidelines For Domestic Hot Water Preheat Systems
Design and Operation Solar System Design Guide General Sizing Guidelines for Domestic Hot Water Preheat Systems The details in the table below are only applicable under the following conditions: – SW, S or SE collector array orientation – Roof pitches from 25° to 55° –... -
Page 65: Solar Radiation Data For U.s.a
Design and Operation Solar System Design Guide Solar Radiation Data for U.S.A. Solar Radiation in MJ/m²/day (horizontal plane) U.S.A State Capitals Montgomery, AL 12.6 16.2 20.3 22.4 23.2 21.7 20.6 17.7 15.0 10.9 Juneau, AK 14.4 18.2 18.2 15.6 13.2 Phoenix, AZ 11.7 15.4... -
Page 66: System For Heating Dhw
Single coil The basis for sizing a solar thermal system for DHW heating is the DHW demand. Viessmann solar packages are sized for a solar coverage up to 60%. The tank capacity must be greater than the daily DHW demand, taking the required DHW temperature into account. -
Page 67: System For Dhw Heating And Central Heating Backup
Examples: For further detailed piping layout examples, see the "Sample Piping Layout Drawings” manual, available for download from the from the Viessmann website. For sizing a system for DHW heating and central heating backup, the seasonal efficiency of the entire heating System with dual coil heating buffer tank system must be taken into consideration. - Page 68 Commercially available solar simulation software programs can be used for the exact calculation. Contact your Viessmann sales representative for a customized design and sizing analysis for your project. Legend A Central heating demand for a house...
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Page 69: Swimming Pool Heating System With Heat Exchanger And Collectors
Design and Operation Solar System Design Guide Swimming Pool Heating System with Heat Exchanger and Collectors Outdoor pools In northern climates, outdoor pools are mainly used between Project example: May and September. Your energy consumption depends Location: Boston primarily on the leakage rate, evaporation, loss (water must Pool surface area: 430 ft. - Page 70 Design and Operation Solar System Design Guide Swimming Pool Heating System with Heat Exchanger and Collectors (continued) Indoor pools Calculation example for Vitosol 200-FM Indoor pools generally have a higher target temperature Number of days per month: ....30 days in June than outdoor pools and are used throughout the year.
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Page 71: Flow Rate In The Collector Array
For larger solar installations, high flow is usually not systems with a Viessmann solar control unit will adjust recommended as this results in bigger pumps and larger itself automatically in matched flow operation. Single pipe sizes. -
Page 72: Flow Rate - Vitosol 200-Fm
Design and Operation Solar System Design Guide Flow Rate - Vitosol 200-FM Specific Flow Rate High Flow Low Flow USG/min/ft 0.0102 0.0123 0.0143 0.0164 0.0184 0.0205 0.0225 0.0245 (L/h/m (25) (30) (35) (40) (45) (50) (55) (60) USG/min 0.26 0.31 0.36 0.41 0.46... -
Page 73: Pressure Drop Of The Solar Thermal System
Design and Operation Solar System Design Guide Pressure Drop of the Solar Thermal System ■ The specific flow rate for the collectors is determined ■ The pressure drop of further solar circuit components by the type of collector and the intended method of can be seen from the technical documentation and is operation of the collector array. -
Page 74: Pressure Drop Of Vitosol 200-Fm, Type Sv And Sh
Note: For multiple Vitosol 200-FM collectors installed in a single array, use the flow rate per individual collector to calculate the pressure drop. Total Flow Rate 1.4 USG/min (5.2 L/min) Collector Pressure Drops for Vitosol 200-FM SV2F & SH2F Specific Flow Rate Low Flow High Flow USG/min/ft 0.0102... -
Page 75: Fluid Velocity
Design and Operation Solar System Design Guide Fluid Velocity To minimize the pressure drop through the solar thermal Note: Excessively high fluid velocity results in a higher system pipe work, the fluid velocity in the pipe should not pressure drop and potentially could erode the walls exceed 3.3 ft/s (1 m/s). -
Page 76: Fluid Velocity And Pressure Drop (Steel)
Design and Operation Solar System Design Guide Fluid Velocity and Pressure Drop (Steel) Pressure Drop and Fluid Velocity for Steel (Sch.40) 1/2” Steel (Sch.40) 3/4” Steel (Sch.40) 1” Steel (Sch.40) Flow Pressure Fluid Pressure Fluid Pressure Fluid Rate Drop Velocity Drop Velocity Drop... -
Page 77: Sizing The Circulation Pump
Viessmann supplies the Solar-Divicon to simplify the installation and the selection of pumps and safety equipment. For construction and specification (see pages 36 and 37). -
Page 78: Ventilation
Design and Operation Solar System Design Guide Ventilation At points in the system that are at high risk from steam or in roof installations, only use air separators with manual air vent valves, which require regular manual venting. This is particularly necessary after filling. -
Page 79: Stagnation In Solar Thermal Systems
Design and Operation Solar System Design Guide Stagnation in Solar Thermal Systems Steam Producing Power All safety equipment in a solar thermal system must be designed for stagnation. If solar generated heat can no longer be transferred inside the system, the solar circuit pump stops and the solar thermal system goes into stagnation. - Page 80 167/149°F A Collector (75/65°C). B Safety valve C Solar-Divicon Note: Viessmann recommends that stagnation coolers be D Heat sink equipped with a heat shield to provide contact E Expansion vessel protection. When using commercially available radiators, contact protection must be provided.
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Page 81: System Fluid Calculator
Design and Operation Solar System Design Guide System Fluid Calculator Solar Components Quantity Liquid Content Total Liquid Content Miscellaneous fluid content 0.80 (3.00) 0.80 (3.00) Vitosol 200-FM, SV2F 0.48 (1.83) Vitosol 200-FM, SH2F 0.66 (2.48) Solar-Divicon, DN20B 0.11 (0.40) Solar-Divicon, DN25B 0.20 (0.75) Solar-Divicon-HX, DN20... -
Page 82: Expansion Vessel
For the liquid content of the following components see Note: Check the size of the expansion tank on site. “System fluid calculator” (see page 81). Note: Contact your local Viessmann sales representative – Solar piping for expansion tank sizing assistance. -
Page 83: System Fluid Expansion Tank Pre-Charge Pressure Calculator
Design and Operation Solar System Design Guide System Fluid Expansion Tank Pre-charge Pressure Calculator System Fluid Expansion Tank Pre-charge Pressure Calculator The collector circuit must be protected during system CAUTION stagnation (emergency shutdown) such that no heat transfer fluid can escape from the pressure relief valve or After de-aeration, the air vent c/w shut-off at top of the air vent located at the collector. -
Page 84: Recommended System Fluid And Expansion Tank Pressures
Design and Operation Solar System Design Guide Recommended System Fluid and Expansion Tank Pressures Static Head Cold Fill Cold Fill IMPORTANT (vertical height) Fluid Pressure Gas Pressure The solar expansion tank is factory pre-charged with psig (bar) psig (bar) Nitrogen to 44 psig (3 bar). The pre-charged gas pressure 45.5 (3.1) 41.1... -
Page 85: Expansion Tank Quick Sizing Table For Vitosol 200-Fm, Type Sv & Sh
Design and Operation Solar System Design Guide Expansion Tank Quick Sizing Table for Vitosol 200-FM, Type SV & SH Fast Air Vent C/W Shut Off 1 to 12 Vitosol 200-FM Collectors 49 ft. (15 m) of horizontal pipe (one way distance) Static Head 16 ft. - Page 86 Note: The values listed in the table above are to be used for reference purposes only! Viessmann does not assume any liability for systems that do not work as expected if an expansion tank is selecting from the table above.
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Page 87: High Limit Safety Cut-Out
Design and Operation Solar System Design Guide High Limit Safety Cut-out The solar control units SCU124/224/345 and SM1 Example: 3x Vitosol 200-FM flat-plate collectors, 75 ft are equipped with an electronic temperature limiter. (7 m ) absorber area DHW tank with 79 USG A mechanical high limit safety cut-out in the tank is (300 L) tank capacity. - Page 88 Design and Operation Solar System Design Guide Connecting the DHW Circulation and Thermostatic Mixing Valve (continued) Mixing Valve DHW Circulation Bypass Line To ensure trouble-free functioning of the solar thermal When a thermostatic mixing valve is used in conjunction system, it is important that the lower portion of the solar with a DHW circulation pump, a bypass line is required DHW tank remain cool so that it can receive the solar between the DHW circulation inlet on the Vitocell tank...
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Page 89: Intended Use
Design and Operation Solar System Design Guide Intended Use The appliance is only intended to be installed and operated Commercial or industrial usage for a purpose other than in sealed pressurized systems with due attention paid to heating the building or DHW shall be deemed inappropriate. these instructions. -
Page 90: Subsidy Programs, Permits And Insurance
Solar thermal systems play an important role in protecting natural resources and the environment. Together with advanced Viessmann heating systems, they create an optimum system solution that is fit for the future for DHW and swimming pool heating, central heating backup and other low temperature applications. -
Page 91: Glossary
Design and Operation Solar System Design Guide Glossary Absorber Irradiance (insolation) Device contained inside a solar collector designed to Radiation level impacting on a unit of surface area, absorb radiation energy and transfer this as heat to a expressed in Btuh/ft (W/m liquid. - Page 92 Solar System Design Guide Scan for digital copy of this document...
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