HVAC / Parts & Accessories
Technical Data Manual for Viessmann Vitosol 200-T SP2A Vacuum Tube Collector
Comprehensive technical guide for the Viessmann Vitosol 200-T SP2A vacuum tube collector. Includes installation guidelines for sloped and flat roofs, flow rate specifications, pressure drop data, and system design information.
Quick answers from the manual
Quick answer
- The Vitosol 200-T SP2A is a vacuum tube collector designed for DHW heating, swimming pool water, and process heat. It features a dry connection system, allowing for tube maintenance without draining the system, and is suitable for sloped roofs, flat roofs, and wall installations. p. 2
Key actions
- Calculate row clearance for flat roof installations to avoid shading. p. 7
- Select the appropriate flow mode (high, medium, or low) based on the number of tubes in the array. p. 11
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Max Stagnation Temperature | 557°F (292°C) | Maximum temperature under no-flow conditions | p. 3 |
| Operating Pressure | 87 psig (6 bar) | Maximum permissible operating pressure | p. 3 |
Where to find it in the PDF
- Product Description p. 2
- Specifications p. 3
- Installation on Sloped Roofs p. 4, 5
- Installation on Flat Roofs p. 6, 7, 8
- Flow Rate Data p. 11
Table of contents
Manual images
Click an image to enlargeQuick Guide
The Viessmann Vitosol 200-T SP2A is a high-efficiency vacuum tube collector utilizing the heat pipe principle. It is designed for domestic hot water (DHW) heating, swimming pool water, and process heat generation. The system features a "dry connection," allowing for tube rotation and replacement without draining the system.
- Max Array Size: 161 ft² (15 m²) per array.
- Installation: Suitable for sloped roofs, flat roofs, and walls.
- Tube Alignment: Tubes can be rotated up to 25° for optimal sun alignment.
- Operating Pressure: 87 psig (6 bar).
Product Description
The collector consists of vacuum tubes with highly selective coated metal absorbers. A heat pipe filled with evaporation liquid is attached to the absorber. When heated, the liquid evaporates, rises to the condenser, transfers heat to the heat transfer medium, and condenses back down. The system is designed for high operational reliability and easy installation using Viessmann assembly systems.
Installation Guidelines
The Vitosol 200-T SP2A offers versatile installation options:
- Sloped Roofs: Can be positioned vertically (tubes at right angles to the ridge) or horizontally (tubes parallel to the ridge).
- Flat Roofs: Requires support structures. Ensure minimum clearances towards the roof edge are maintained per DIN 1055. Use ballast or secure to the substructure to prevent slippage, tipping, or lifting.
- Walls/Balconies: A special 1.26 m² 10-tube model is available for balcony railings or walls.
Note: Always refer to the specific Vitosol 200-T, SP2A Installation Instructions for detailed mounting hardware dimensions and procedures.
System Design and Flow Rates
Proper system design is critical for efficiency:
- Row Clearance (z): On flat roofs, calculate the row clearance to avoid shading, especially during the shortest day of the year. Use the formula: z = sin(180° - (α+β)) / sin(β) * h.
- Flow Modes: Choose between high, medium, or low flow modes based on the system size. High-flow mode is recommended for small systems (
- Pressure Drop: Calculate pressure drop based on the total flow for the entire array.
Technical Specifications
The following specifications apply to the Vitosol 200-T SP2A models (1.26 m², 1.51 m², and 3.03 m²):
- Maximum Stagnation Temperature: 557°F (292°C).
- Optical Efficiency: 78.5%.
- Heat Loss Factors: k1 = 1.42 W/(m²·K); k2 = 0.005 W/(m²·K²).
- Thermal Capacity: 8.4 kJ/(m²·K).
- Connection: ¾ in. (22 mm).
Manufacturer information
Viessmann Climate Solutions
Practical help
Common problems
Shading on flat roofs
Calculate the required row clearance (z) using the provided formula based on latitude and sun angle to ensure rows are free of shading on the shortest day of the year.
Insufficient flow or high friction losses
Ensure the system operates within the specified high, medium, or low flow rate ranges. Use medium or low-flow modes for arrays larger than 50 tubes.
Collector slippage on flat roofs
Secure collectors on concrete slabs with additional ballast or fix them to other roof structures to prevent movement due to wind.
Before use
- Verify roof structure suitability for the additional load.
- Calculate required row clearance (z) for flat roof installations.
- Determine the appropriate flow mode (high/medium/low) based on total collector array size.
- Ensure the collector angle is greater than 0°.
- Check if the SCU control 'Evacuated tube collector' function is enabled for the specific connection type.
Specs in practice
- Stagnation temperature
- The maximum temperature the collector reaches under no-flow conditions (557°F/292°C).
- Dry connection
- A design feature allowing tubes to be rotated or replaced without draining the solar circuit.
- Operating pressure
- The maximum permissible operating pressure is 87 psig (6 bar).
Model compatibility
- Maximum 161 ft² (15 m²) absorber area can be connected in series per array.
- Tubes can be rotated up to 25° for optimal sun alignment.
- Compatible with sloped roofs, flat roofs, and wall/balcony installations.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.