Vision TZ58/1800-10 Installation, Operation And Maintenance Manual page 10

Vision Solar Systems - 100 L Gravity Fed Type
2) The tubes are cool on the outside; consequently there is no danger of being burnt
should they be touched.
3) No pressure and temperature relief valve is needed provided that the system is
correctly installed, with the vent pipes not extended more than 1 meter above the main
tank.
On the operational side there are also some great features;
1) The ball valve is the only moving part. High quality brass and stainless steel valves are
used to ensure durability and consistent operation.
2) The system works naturally so it will not need any power to control or manage the hot
water. Even overheating and freezing of the main tank parts are inherently controlled.
3) Inherently freeze resistant with the water in the main tank. (Excluding connecting pipe
work)
4) Inherently protected against overheating by the low pressure vented tank design and
the latent heat absorbed by boiling water.
5) No glycol or sacrificial anode maintenance required.
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Issue 2.0 Mar 2013
10