PANEL HANDBOOK aH72 SK
V 6.0
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Check for solar fluid leaks on a quarterly basis. Leaks can cause a dilution of the thermal fluid
which, if not tested and maintained, could allow freezing due to loss of glycol. In addition, make-
up water can cause the accumulation of hardness inside the heat absorber, thus decreasing the
performance of the system.
2.1.2
Solar fluid test
It is recommended that the solar fluid is checked once a year by a qualified professional as a preventive
measure. This person will perform a chemical test of the water in a closed circuit (solar fluid). The
biological incrustations, the protection against freezing, the pH and the other chemical properties
should be analysed.
Prevention of freezing is essential to avoid system failure or damage to collectors or pipes. With an
automatic water replenishment system, a leak in a pipe can cause damage to the exterior and interior
of the system and building which are costly to repair.
2.1.3
Hydraulic system maintenance
Follow the pump manufacturer's recommendations for scheduled maintenance work and
inspections. These inspections will check the pump seals and gaskets for leaks, ensuring that
the flexible couplings are in good condition and that bearing lubrication is performed as
required.
Expansion vessels should also be inspected to ensure that the pressure control system is
functioning. Follow the instructions and maintenance plan provided by the manufacturer of the
expansion vessel.
Pressure relief valves should be inspected to ensure that they are in good working order, at the
intervals stated in the maintenance plan (Section 7 of this manual).
Safety valves, storage tanks and their accessories shall be inspected for leakage (see frequency
in the maintenance plan).
For domestic hot water systems, the competent authorities may require that periodic
disinfection of systems in contact with drinking water or food preparation be carried out,
inspected and tested. Local regulations should be taken into account depending on the location
of the facility in this respect.
2.1.4
Electrical and control system maintenance
Follow the recommendations of the manufacturers of auxiliary electrical equipment for
preventive and predictive maintenance: regulation and control system, power supply system
for pumping, heat dissipation equipment, automatic glycol supply (filling) system (if installed)