SUN&HEAT THERMOSIPHON 150/2.5 Maintenance And Installation Manual

Solar domestic water heater

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SUN & HEAT SOLAR PRODUCTS

INSTRUCTIONS FOR USE,

MAINTENANCE AND INSTALLATION

OF THE

SOLAR

OF THE SOLAR

DOMESTIC WATER HEATER

THERMOSIPHON 150/2.5

(TYPICAL INSTRUCTIONS FOR A CLOSED LOOP

THERMOSIPHONIC SYSTEM ON A FLAT ROOF)

European Commission

Directorate General for Energy and Transport

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Page 1: Instructions For Use
MAINTENANCE AND INSTALLATION MAINTENANCE AND INSTALLATION OF THE SOLAR OF THE SOLAR DOMESTIC WATER HEATER DOMESTIC WATER HEATER THERMOSIPHON 150/2.5 (TYPICAL INSTRUCTIONS FOR A CLOSED LOOP THERMOSIPHONIC SYSTEM ON A FLAT ROOF) European Commission Directorate General for Energy and Transport...
Page 2                 THERMOSIPHON 150/2.5 (TYPICAL INSTRUCTIONS FOR A CLOSED LOOP THERMOSIPHONIC SYSTEM ON A FLAT ROOF)
Page 3 These Instructions for Use, Maintenance and Installation of the Solar Domestic Hot Water System Thermosiphon 150/2.5 accompany the product. They should be delivered to the Buyer by the authorized Installer upon completion of the installation and setting it up in operation ...
Page 4: Table Of Contents
Table of Contents          A general description of how a DHWS operates Performance of a solar domestic water heater Need for an auxiliary heater Heat losses during the night Use of hot water in a household Clothes washing Dishwashing with solar hot water Efficient use of a solar domestic hot water system...
Page 5 CAUTION Contact an authorized dealer or the Service Department of SUN&HEAT for the installation, repair and maintenance of this solar domestic hot water system. IMPORTANT SUN&HEAT provides a Guarantee for this product. Relevant terms are included in IMPORTANT Contact an authorized dealer or the Service Department of SUN&HEAT for the installation of a Mixing Valve, which restricts the hot water temperature from the solar water heater below 60oC (see paragraph 1.7) BASIC PRODUCT SPECIFICATIONS...
Page 6  Thank you for buying this, Thermosiphon 150 /2.5, SUN&HEAT solar domestic hot water system. Please read through these instructions carefully and be sure to keep them handy in a safe place for future reference. By following these instructions you will be able not only to take advantage of the high potential of the solar system for more hot water, but you will ensure its reliable performance and...
Page 7: A General Description Of How A Dhws Operates
    The SUN&HEAT Solar Domestic Hot Water System, Thermosiphon 150/2.5, operates without any intervention. Just enjoy the hot water, which is heated by the solar radiation absorbed by the collector during the day. Solar systems for heating water for homes have some important advantages: •...
Page 8: Performance Of A Solar Domestic Water Heater
1.2 Performance of a solar domestic water heater The temperature of the hot water inside a solar water heater at the end of a sunny day depends on the available solar radiation, the temperature of the water supplied by the city network, the ambient air temperature and the temperature of the existing water inside the storage tank at the beginning of the day.
Page 9: Need For An Auxiliary Heater
1.3 Need for an auxiliary heater From what has been previously mentioned, it is obvious that in winter, city water temperature is lower and there is less available solar radiation. In summer, however, city water temperature is higher and more solar radiation is available. Therefore, during the winter, it will be necessary to use a supplementary energy source.
Page 10: Clothes Washing
1.6 Clothes washing Hot water from a solar domestic water heater can be used in a washing machine in the case that it (the washing machine) has two feeding pipes, one for hot water and one for cold water. Such washing machines exist and their cost is not higher than the cost of a washing machine with one feeding pipe (cold water).
Page 11: Use Of The Back-Up Heating System (Electric Heater)
latter case, a collector at a high temperature loses energy towards the surrounding environment from all sides, especially through the transparent front cover (glass). Therefore, the main principle for efficient operation of a domestic hot water system is for the water in the storage tank to be at a low temperature in the morning, when solar radiation begins to increase.
Page 12: Freezing Weather Conditions
its increasing temperatures, which may not be absorbed by the pipes of the city network or the safety valve. 1.10 Freezing weather conditions In the case freezing weather conditions, the SUN&HEAT closed-loop solar water heater is automatically protected, provided that, during installation, the correct solution of water and antifreeze (heat transfer fluid) was used (depending on the installation site).
Page 13: Normal Operation (Heating Water By The Sun)
 2.1 Normal operation (heating water by the sun) If your solar water heater is operating inefficiently or is not heating the water in the storage tank, you must consult an authorized dealer or the service Department of SUN&HEAT. Possible reasons for unsatisfactory performance of a DHWS are: •...
Page 14: Regular Inspections By The Owner
 A SUN&HEAT Thermosiphon 150/2.5 needs some basic maintenance. If maintenance tasks are done, high efficiency is ensured for many years. Some action can be taken by the owner. Periodic maintenance and/or repair work must also be done by a specialized expert from the service department of SUN&HEAT or by an authorized dealer.
Page 15 Maintenance tasks should be done by either an authorized dealer or by technical experts from the Service Department of SUN&HEAT. Maintenance consists of inspections (and possible repairs) and also replacement of some parts for each component of the solar system as shown below: Solar collector - inspection of the collector front cover, i.e.
Page 16 Piping to the house etc - inspection of the insulation of the hot and cold water pipes connecting the solar system with the house - inspection for leakage from the same pipes (soldering, connections, etc). - inspection of the water pressure reduction equipment for the city water (in case that such a device is used).
Page 17: Components Of The Solar Water Heater
Chapter of this leaflet. Components of the solar water heater The basic components of the solar water heater Thermosiphon 150/2.5 are shown in Figures 4.1a and 4.1b in the next pages.
Page 18 5. Expansion tank of the closed loop 6. Safety valve (pressure) of the closed loop 7. Closed loop “cold” pipe (fluid flows from the tank to the collector) 8. Closed loop “hot” pipe (fluid flows from the collector to the tank) Figure 4.1a Basic components of the Thermosiphon 150/2.5 solar water heater  ...
Page 19: Mounting Frame
3. Mounting frame 9. Domestic hot water outlet from the storage tank 10. Combined “safety (pressure) one-way” valve 11. Domestic cold water inlet to the storage tank Figure 4.1b Basic components of the Thermosiphon 150/2.5 solar water heater    ...
Page 20: Collector Orientation
Collector orientation The solar collector should face true south in order to have as much solar energy falling on it as possible, during a day. In many cases, a slight westerly orientation is preferable to true south, in order to take advantage of the afternoon’s higher outdoor temperatures, which leads to better collector performance.
Page 21 ) leg 24. Diagonal connector 25. Horizontal connector 27. Lower collector support bar (see Figure 4.7a) 28. Upper collector support bar (see Figure 4.7b) Figure 4.2 Part of the mounting frame of the solar water heater Thermosiphon 150/2.5     ...
Page 22 21. Tank circular arc support 22. Vertical leg Figure 4.3 Attaching the tank circular arc support to the vertical leg (Step 1). 21. Tank circular arc support 22. Vertical leg 23. Inclined (45 ) leg Figure 4.4 Attaching the inclined leg to the vertical leg of the mounting frame (Step 2).
Page 23 22. Vertical leg 24. Diagonal connector Figure 4.5 Attaching the diagonal connectors between the two vertical legs (Step 3).     ...
Page 24: Fastening The Collector On The Mounting Frame
22. Vertical leg 23. Inclined (45 ) leg 25. Horizontal connector Figure 4.6 Attaching the horizontal connector between the inclined and the vertical legs (Step 4). Fastening the collector on the mounting frame Attach first the lower collector support bar in the mounting frame, as it shown in the upper photo of Figure 4.7a.
Page 25 water and until the closed loop is filled with the heat transfer fluid. Exposing a “dry” collector to the solar radiation will cause the absorber to develop high temperatures (more than 150 C). Under these conditions, there is the possibility of boiling of the heat transfer fluid (when it will be put in the collector) and as a consequence the danger of an accident.
Page 26: Mounting The Hot Water Storage Tank
1. Solar collector 18. Upper collector support bar Figure 4.7b Fastening the collector on the mounting frame (Step 2). Mounting the hot water storage tank Place the tank onto the mounting frame evenly between the two vertical legs (see Figure 4.1a), with the electric heater flange side to the left, as you look at the solar heater from the front.
Page 27 Before making any connection, the pipe thermal insulation (see Figure 4.10) should be passed outside from the plastic connecting pipes. The length of the insulation is longer than the corresponding pipes, so that the insulation can cover also the fittings at all connecting points, as shown in Figure 4.11.
Page 28 Tank heat exchanger outlet 1. Hot water storage tank 2. Solar collector 7. Closed loop “cold” pipe (flow from the tank to the collector) Figure 4.9 Connection pipe and fittings between the outlet of the tank heat exchanger and the collector inlet ...
Page 29 Figure 4.10 Thermal insulation for the connecting pipes between the collector and the tank Storage Heat exchanger tank outlet 1. Hot water storage tank 7. Closed loop “cold” pipe (flow from the tank to the collector) 10. Combined “safety (pressure) one way” valve Figure 4.11 The insulation of the pipe 7 covers completely the fitting at the outlet of the heat exchanger of the tank ...
Page 30: Connection To Cold And Hot Water Networks
1. Hot water storage tank 2. Solar collector 7. Closed loop “cold” pipe (flow from the tank to the collector) 8. Closed loop “hot” pipe (flow from the collector to the tank) Figure 4.12 Tape is used to attach the thermal insulation in the fitting at the inlet of the heat exchanger of the tank and at the inlet and outlet of the collector 4.10 Connection to cold and hot water networks Connect the combined “safety (pressure) and one-way”...
Page 31: Fastening The Mounting Frame To The Floor Of The Roof
Cold water inlet of 1. Hot water storage tank (lower part) the tank 10. Combined “safety (pressure) one-way” valve Figure 4.13 Attaching the combined “safety (pressure) one-way” valve to the cold water inlet of the storage tank Figure 4.14 Schematic diagram for the installation of the Mixing Valve 4.11 Fastening the mounting frame to the floor of the roof The mounting frame is already in its final location and the various components of the solar water heater have been attached on it.
Page 32: Filling The Closed Loop With The Heat Transfer Fluid
4.12 Filling the storage tank with water After the fastening of the mounting frame, start filling the storage tank with water from the city network. Some hot water tap in the house should be open for the removal of the air from the tank during the filling process.
Page 33 Figure 4.15 Steps for fastening the mounting frame on a flat roof and water proofing of the relevant point     ...
Page 34: Mounting The Closed Loop Expansion Tank & Safety Valve
4.14 Mounting the closed loop expansion tank & safety valve The location for the mounting of the closed loop expansion tank and safety valve (pressure) is shown in Figure 4.1a. CAUTION Do not add any heat transfer fluid in the expansion tank. The expansion tank should be empty when the closed loop is under cold conditions.
Page 35: Exposure Of The Solar Water Heater To The Sun
4.16 Exposure of the solar water heater to the sun After completion of the installation, remove the opaque cover from the solar collector. Under these conditions, the solar heater starts to operate on a sunny day. Please check • the closed loop for any leaks •...
Page 36  1. Date: Service by: Description of works: New parts: Comments: 2. Date: Service by: Description of works: New parts: Comments: 3. Date: Service by: Description of works: New parts: Comments:     ...
Page 37  4. Date: Service by: Description of works: New parts: Comments: 5. Date: Service by: Description of works: New parts: Comments: 6. Date: Service by: Description of works: New parts: Comments:     ...
Page 38 in the framework of the project: SOL-MED II Widening the use of European Solar Thermal Technologies in Mediterranean Countries following the Successful Model of Greece PART B: Italy, France, Romania, Bulgaria, and Turkey Contract No.: NNE5/2002/86 Editor: EXERGIA S.A. ENERGY & ENVIRONMENT CONSULTANTS Apollon Tower, 64 Louise Riencourt Str.