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STC Solar SPA Collector Kit Installation Manual

Solar thermal system
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STC Solar Installation Guide
Installation of Solar Tube Company Solar SPA Collector Kits
Warning: Only install your system if you and any persons working with you are competent to do so,
and only after you have assessed all risks, and either eliminated them or reduced them to safe levels.
Caution: There is a boiling risk, which is fully avoidable. Either fit the tubes at the end of the
installation after the system is filled or shade the tubes prior to commissioning.

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Summary of Contents for STC Solar SPA Collector Kit

  • Page 1 STC Solar Installation Guide Installation of Solar Tube Company Solar SPA Collector Kits Warning: Only install your system if you and any persons working with you are competent to do so, and only after you have assessed all risks, and either eliminated them or reduced them to safe levels.
  • Page 2 Just in case you need reminding why you chose a STC System, here are the key features of our kits: 1. Fast payback 2.

  • Page 3: Collector Installation

    Installation G General Installation of a solar thermal heating system usually requires safe working at heights on a roof. It is essential to check that the rafters are strong enough (rafters should have a minimum cross-sectional area of 75 sq cm); if in any doubt, ask a structural engineer to advise.
  • Page 4 Installation G Frame Assembly (for Pitched Roof Installations) (For 24/30 tube collectors use 3 vertical pieces) Attach frame vertical pieces to back of manifold Turn over Attach cross rail so that opened groove is at top Secure cross rails using M13 bolts and stainless fittings The collector can now be offered up to the roof in order to find the best place to fix it.
  • Page 5 Installation G Flat Roof Frame Assembly (For 24/30 tube collectors use 3 legs / side supports) Attach legs to top of frame (M10 X 45 bolts) Attach feet, folding in tabs to fit (M10 X 45 bolts) Attach side supports (M13 x 20 bolts) Attach rear supports (M13 x 20 bolts) Join rear supports at middle of X (M10 x 30 bolt) The collector can now be offered up to the roof in order to find the best place to fix it.
  • Page 6 Installation G Stainless Steel Roof Bolts Undo the nuts on the back of the manifold and assemble the frame (it shouldn't use washers), then offer this up to the roof and mark the top and bottom slots on the frame on to the tiles using chalk or a drill etc...
  • Page 7 Installation G Connecting the Pipe Work to the Collector There are many ways in which to attach the pipe work to the collectors, different installers preferring different methods. The flow and return pipes are connected to the collector by means of 22mm compression couplings.
  • Page 8 Installation G 1. Feed the stainless pipe through a back nut, threads facing cut end. 2. Tighten a securing clip around the last groove on the pipe (one raised segment protruding from clip). 3. The back nut is attached to the fitting WITHOUT the washer and tightened – this creates a flange on the end of the pipe.
  • Page 9 Installation G Using Leaded Roof Grommets and Pre-Insulated Flexible Stainless Steel Pipe The size of the hole is less important when using leaded roof grommets because they provide their own weatherproof seal. They can be used instead of the tile beneath them. In which case, simply lay the leaded tile in the gap left by the replaced roof tile, making sure that the top edge lies under the tile immediately above it and the bottom edge lies on top of the tile immediately below it –...
  • Page 10 Installation G The Pump Station This is usually located in beside the hot water cylinder. The control panel can be removed from the unit and located elsewhere to provide more convenient control/display (by extending the electrical cable running from the controller to the pump). Connect the return DN16 2-in-2 pipe (the one carrying fluid back to the collector) to the top connection of the pump station using a PAW self seal nipple and the back nut –...
  • Page 11 (0.1L/min for STC collectors, e.g. 2L/min for each 20 tube collector). The flow rate can be adjusted via the valve on the flowmeter.

  • Page 12: Need More Help

    Installation G Fitting the Tubes The heat pipe vacuum tubes can be fitted at any time, often as the last job. They are not directly connected to the fluid and so can be installed or removed at any time. Damage to a tube does not affect the rest of the system.