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

 Monitor the current on the electrical element with a tong tester. (Do not confirm with
voltage measurements.)
 The system is now ready for use and will require some time to heat. See performance
information on page 11 to gauge the time it will take to heat the water sufficiently.

Cleaning

If your water contains gritty sold objects like sand, Enervision recommends the use of a filter on the cold water
supply to the system.
Grit in the tank (Not a procedure that is normally required)
If the water quality is poor, purge the tank periodically to ensure that there are no concentrations of
chlorides in the tank water.
Use the procedure below if there is grit build-up in the tank.
 Cleaning deposits from the tank is best done by a professional installer to ensure that it is done
safely and to avoid any damage to the system. Please ensure that you fully understand the
safety considerations before any attempt is made to do this on your own.
Switch off the water supply.

 Drain the main tank.
Remove the electric element and drain valve.

Using a high pressure cleaner, jet water into the tank and allow the grit build-up to flow out the

other end.
 Reconnect and seal the electrical element and the drain valve.
Switch on the water supply.

 Check for leaks on the tank and pipe work.
Grit in the tubes (Not a procedure that is normally required)
 Use the procedure above before reconnecting the water supply.
 Remove each tube ensuring that the tube and seal are not damaged.
Jet water into the tube and allow the grit to exit.

 Fill the system as detailed in "First filling with water and commissioning". Use the same
precautions if the sun has heated the tubes.
Routine Inspection and Maintenance
Maintenance will play a vital role in obtaining the best performance and the continued successful
operation of your solar water heating system throughout its operational life. By diagnosing
problems early, and taking the necessary remedial action, you can ensure cost effective operation
and compliance with warranty requirements.
The Programme begins with regular routine inspections on the system. The interval between
inspections will depend largely on the environmental and water conditions in your area. We
recommend that, for average conditions, an interval of at least once every 6 months be conducted.
This inspection should include the following:
Cleaning the tubes
Tubes need to be cleaned periodically (at least every 6 months depending on the environment) to
remove dirt and increase the solar efficiency.
 Use a hose to wash down the vacuum tubes.
 Using a soft cloth wipe down the tubes removing any caked-on dirt.
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Issue 2.0 Mar 2013
Vision Solar Systems - 100 L Gravity Fed Type