De Dietrich D 230 Folleto De Información Sobre El Sistema página 14

UK
State of repair of collectors:
Presence of condensation and dirt
Presence of cracks, deformation
Presence of corrosion
Appearance of leaks
Verification of temperature probe mounting
State of repair of the collector support structure and its fixing elements:
Degradation, signs of corrosion and bolt tightening
Condition of collector fixing elements
State of repair of roof around the solar system
Control of vegetation around the collector
Check on system weights, where necessary
Hydraulic circuit:
Presence of air inside the system
Check on correct operation and cleaning of air valve
Inspection to determine deterioration of insulation
Pressure test
Presence of leaks
Pump seal
Pump operation while the system is running
System flow check
Check on refrigerant density using a refractometer
Check to ensure that the pH value of the refrigerant is pH>7.5
Verification of operating pressures:
Check on system pressure
Check on expansion tank pressure
Security system
Actions (opening and closing) to check for cut-off valve stiffness
Presence of glycol in the collection tray
Check on safety valve operation
Regulation system:
Check on pump shut-down and start-up differential
Check of reading of the system's temperature sensors
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