13
INSTALLATION
INSTALLATION
− Pump the heat transfer fluid around the circuit with an
external filling pump until all air bubbles have been
eliminated. Close the manual bleed valve and any vent
valves opened previously.
− Turn handle on valve (VR) counter clockwise
− Temporarily raise the pressure in the system to 4 bar.
− Start up the system for about 20 minutes.
− Repeat air bleeding operation until system is completely
free of air bubbles.
− set the system pressure.
− Close taps (A) and (B).
9
The set pressure must ensure that the one measured at the
solar collectors is positive with respect to the ambient one
(avoid depression in the solar field) and must be set con-
sidering both the safety valve opening pressure (6) and the
solar expansion reservoir pre-charge pressure. To set the
system pressure correctly, refer to the design manual.
0
Do not fill the system in bright, sunny conditions or if the
collectors are hot.
9
Use a manual bleed valve, which should be installed at the
highest point in the system, to ensure that all air bubbles
have been eliminated from the circuit.
19
DEVICE CLEANING AND MAINTENANCE
9
Service the system at least once a year and carry out the
inspections specified in the relevant manual.
The following operations must be exclusively performed by
Technical Assistance Service.
19.1
Checking the seals
After commissioning, check hydraulic fitting sealing. Make
sure there is no leakage close to electric components to avoid
short-circuits.
19.2
External cleaning
Clean the outside of the storage cylinder with a soft cloth
damped in soapy water.
Use a dry rag to clean the insulation and the solar regulator dis-
play to remove any dust.
0
Do not use abrasive products, petrol or triethylene.
