TECHNICAL MANUAL SOLAR SELECTIVE COLLECTOR Solar Keymark OFFICIAL QUALITY MARK OF THE EUROPEAN UNION

The M4 Calpak collectors are flat plate vertical or horizontal array collectors, with aluminium sheet absorbers, with vertical copper pipes welded onto them, ending, at their upper and lower ends, in two horizontal headers. The thermal fluid circulates between the vertical and horizontal pipe grid. The surface processing of the aluminium sheet is of selective quality, achieved with the ecological “Sputtering” method by TINOX. These surfaces have a great advantage in that, while absorbing solar energy, they operate as black bodies (high absorptivity), but when they themselves radiate, they operate...

In order to ensure the anti-freeze protection of the collector, we offer the Calpak NOX thermal fluid, which is a product based on the non-toxic pharmaceutical propylene glycol (accessory). This thermal fluid is mixed with water, at a minimum volume ratio of 20%. In areas with low winter temperatures, this ratio changes, as shown in the table below: These collectors, due to their selective properties and the reduced thermal losses, are appropriate for countries and regions with cold winters for producing hot water, and are a good solution for central solar heating systems of premises, for large...

Back of 0.5mm aluminium sheet Double-wall 1.2mm thick aluminium frame, painted with RAL7021 electrostatic paint. EPDM sealing gasket Aluminium clamp painted with RAL7021 electrostatic paint Absorber header of 022 copper pipe Thermal insulation with rock wool with 50kg/m2 density and 40mm thickness Low iron (Ta =91.5%), mistlite, tempered safety glass, 3.2 mm thick Vertical copper 08 pipes Absorber with 0.3mm thick aluminium sheets and with selective surface processing by TINOX (a=0.95, e=0.035) Welding of flaps on the vertical tubes with the ultrasonic method Distances of hydraulic connections...

TECHNICAL CHARACTERISTICS Type of Collector Total surface area Window surface Absorber surface Active heat capacity Weight (empty) Content of thermal fluid Standby temperature Hydraulic connections (copper pipe). Time constant Coefficient of angle of incidence at 50° Annual energy performance in Athens (tm=25°C) Annual energy performance in Athens (tm=25°C) The Φ8 ventilation hole is equipped with louvres to prevent the entry of insects. Header cover to maximise performance and for the aesthetic appearance of the collector. Aluminium angle inside the double wall of the frame profile reinforces...

based on the absorber surface

• Falling sun radiation on flat Collectors ( w/m2 ) in the Athens Area tilt The tilt is in degrees (°) to horizontal 11= Total solar radiation throughout the year 12= Total solar radiation from April 1st to October 31st 13= Total solar radiation from November 1st to March 31st • Optimum tilt angle for collectors depending on use Usage • Indicative table for anticipated performance drops based on orientation SOUTH Note For operation in the summer only, the change in the horizontal tilt from 45° to 15° does not significantly affect the thermal performance of the solar system. Recommended flow of...

The following accessories are provided, to facilitate installation: • Aluminium bases for flat roofs, with adjustable tilt • Bases for pitched tiled roofs • Special collector covers for the best protection and prevention of overheating of the solar system in the summer, if it is not in use. • Calpak NOX thermal fluid based on non-toxic pharmaceutical propylene glycol, packaged in 1-, 2-, 5- and 10-liter canisters. • Automatic ventilators • ‘T’, protection pockets and sensors • Full range of solar stations for controlling the operation of central solar systems, with or without circulator Calpak...