13
ENGLISH
INSTALLATION
INSTALLATION
SYSTEM FILLING COCK
Before filling the system:
- Cut power off to the solar station and to the connected
integration system, by setting the system's main switch
and the device's main switch to OFF
b
Always use a mixture of water and glycol suitable for
solar applications. Choose the mixture according to the
minimum temperature that can be reached at the instal-
lation site and to the maximum service temperature of
solar collectors. For further information, please refer to
the glycol safety data sheet.
When using glycol not pre-mixed:
- Do NOT part fill the circuit with pure glycol then add
water later.
- Ensure that filling water characteristics comply with pre-
vailing regulations; if that is not so, filling water must be
treated. Use portable treatment systems, for instance.
In particular, when chlorine content is very high (>
50ppm) you must use distilled water for the mixture.
B
VM
A
VR
Mixture
of glycol
and water
PC
PC
Heat transfer fluid filling pump
To fill the system, proceed as follows:
- Connect the filling pump (PC) as shown
- Turn handle on valve (VR) clockwise
Open taps (A) and (B) on the return tube
- Open manual degassing tap and any bleeder valve,
located at the highest points of the system, and keep
them open throughout the filling procedure.
- 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 complete-
ly free of air bubbles.
- set the system pressure.
- Close taps (A) and (B).
b
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
considering 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.
a
Do not fill the system in bright, sunny conditions or if the
collectors are hot.
b
Use a manual bleed valve, which should be installed at
the highest point in the system, to ensure that all air bub-
bles have been eliminated from the circuit.
DEVICE CLEANING AND MAINTENANCE
b
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 Centre.
Checking the seals
After commissioning, check hydraulic fitting sealing. Make
sure there is no leakage close to electric components to avoid
short-circuits.
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
display to remove any dust.
a
Do not use abrasive products, petrol or triethylene.
