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3.3 Maintenance
Periodical check
To ensure proper operation of the unit over time, have qualified personnel carry out a yearly check, providing for the
following:
•
The control and safety devices (gas valve, flowmeter, thermostats, etc.) must function correctly.
•
The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. - The sealed chamber must be tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
•
The air/fume terminal and ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. For cleaning do not use chemical products or wire
brushes.
•
The electrode must be free of scale and properly positioned.
•
The gas and water systems must be tight.
•
The water pressure in the cold water system must be approx. 1 bar; otherwise bring it to that value.
•
The circulating pump must not be blocked.
•
The expansion tank must be filled.
•
The gas flowrate and pressure must match that given in the respective tables.
A
The boiler casing, control panel and aesthetic parts can be cleaned with a soft damp cloth, if necessary
soaked in soapy water. Do not use any abrasive detergents and solvents.
Solar circuit
Make sure to periodically check the condition and pressure of the fluid in the system when cold, at least once every 2-
3 years, if possible at the end of the most critical period in relation to the risk of prolonged stagnation of the fluid in the
collectors (overheating of the fluid due to maximum insolation with system idle/not used: e.g. the check should be car-
ried out immediately after the summer holidays).
If FERSOL solar fluid is used, the condition of the fluid, or protection stability , is visually indicated by its pink/purple colour
and a change to a different colour (colourless) indicates deterioration to a minimum protection level .At this point, change
all the fluid or in any case check that the pH is not below 8 , in which case change the fluid so as to avoid problems.
Do not dilute the fluid with water or other fluids. When necessary, top up only with the same product.
Do not use in systems executed with materials that are not compatible with moderately alkaline liquids (PH 8 - 10).
Information regarding disposal: The fluid is not considered hazardous for the health and the environment, nevertheless
it must not be disposed of or diluted in potable waters (e.g. ground waters) or water for food products.
26
ECONCEPT SOLAR ST
cod. -- - 11/2010 (Rev. 00)
EN
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