Davis & Shirtliff DAYLIFF Ultrasun UVT VacTube, Инструкция по установке и эксплуатации

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7. It is advisable to use compression plumbing pipes which can be installed
without tools for cold and hot water usage for ease of installation and
maintenance. They provide better insulation than manually-insulated metal
pipes, and need no insulation of the hot water plumbing if pipe does not
exceed 12 meters. Pipe wrench use is also unnecessary.
8. The distance between points of use and the solar water heater should be
minimized as much as possible, the maximum recommended distance
without heat loss is 12 meters using recommended pipes. For longer
distances proper insulating material should be used to prevent heat loss.
9. Using a spanner, grip the nipple firmly while tightening inlet/outlet pipes to
tank. This is necessary to prevent nipple weld breaking.
Fig 7
10.To reduce heat loss in the pipelines, 3-4 outlet points are recommended. In
case the outlets exceed this or the water line is long, it is recommended to
expand the capacity of the solar water heater. The standard diameter of
inlet/outlet points of the solar water heater 1/2”.
11.In places where the hot and cold water pressure is not equal and mixing
valves are used at the usage point, care should be taken to install either non-
return valve (NRV) based mixer or a NRV on the hot water pipe of each usage
point so as to prevent the reverse flow of hot water.
12. Use soap or oil on glass tubes then insert them into solar water heater tanks.
Cover glass tubes with materials like canvas, cloth or cardboard till the
proper plumbing connections are made and the solar water heater is
supplied with regular cold water. This is to avoid the glass tubes overheating
without water, which could lead to breakage.
Installing Glass Tubes