Varisol Installation Manual
24
Servicing and Maintenance
Users should regularly check the temperatures which the solar control panel is
recording. With the SC range of controllers, simply pressing the ‘SET’ button on the
fascia once will display the upper and lower collector temperatures since the control
panel was last reset. If the collector temperatures have been excessively high i.e. over
170˚C, it is likely that the fluid is degrading. It is recommended that the antifreeze
level checked using a refractometer by a qualified engineer.
A sample of the Tyfocor® LS antifreeze fluid can be extracted from the pump station
at the pump itself. The large centre of the pump hub can be opened with a large
flathead screwdriver. This should be opened slowly until a few drops of the antifreeze
fluid are released. A sample of the fluid placed on the glass of the refractometer will
display the level of antifreeze in the system. If the antifreeze has lost its antifreeze
properties the system should be refilled with fresh Tyfocor® LS.
It is recommended that the solar system is serviced annually by a qualified engineer
and immediately if the system shows evidence of having lost pressure or has
discharged liquid at the pressure relief valve. The Tyfocor® LS antifreeze fluid should
always be replaced after 7 years.
Maintenance schedule
A qualified person should service the system at the recommended intervals, using
the maintenance schedule. In addition the user should check the system pressure at
regular intervals. A visual inspection of the pressure gauge is required to check that
the system pressure is maintained.
Please see page 29 for maintenance schedule form.
Disposal of Solar Anti-Freeze Solution
The solution we supply with our solar systems is a thermal transfer fluid based on
1,2 propylene glycol and water. The solution also contains corrosion inhibitors and
has been specifically designed for used in solar systems with elevated temperatures,
such as those experienced with Vacuum Tube Collectors.
Propylene Glycol is a widely used ingredient in pharmaceutical, food, cosmetic,
personal care, flavours and animal feed applications. Propylene glycol is not volatile,
but is miscible with water. Propylene glycol is not harmful to aquatic organisms and
is readily biodegradable; however the disposal of the solution should be done in
a responsible manner taking into consideration local Environmental and Health &
Safety legislation.
While the solution is not subject to registration as a hazardous material according
to EEC directives the solution should be disposed of by special means. There are a
number of specialist companies that can deal with the disposal of propylene glycol.
A list of these companies is available upon request. A copy of the EEC Safety Data
sheet and Technical Information sheet is available upon request. We recommend
that you contact your local authority to check that they will accept the solution at
special landfill collection points.
Summary of Contents for Varisol DF
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