Riello 20127134, Installer, Technical Assistan Ce Service And User Manual

Page: 12 / 16

12
INSTALLATION
INSTALLATION
13 FILLING AND EMPTYING
Before system commissioning it is necessary to wash and fill it.
Solar collectors are exposed to the risk of frost during winter, as
they are installed outdoor. Moreover, they can reach high tem-
peratures in stagnation conditions, consider these things when
choosing the heat transfer fluid.
9
If copper piping has been used and joints have been hot
brazed, flush out the system to remove any brazing resi-
dues. Seal test the system after you have flushed it out. Fill
the solar collector with glycol/water mix immediately after
flushing it out, because flushing water may remain trapped
in the circuit (with a consequent risk of freezing).
9
For system washing, filling and emptying, follow the in-
structions contained in the manual of the matched solar
station.
9
Filling, emptying and venting must be carried out with col-
lectors at ambient temperature and protected from solar
radiation.
A
7
°C
Anti-freeze mix
Water control system
Heat
transfer fluid
filling pump
Solar collector
R
M
Manual
bleed valve
(accessory)
Heat exchanger
of solar
M
T
14 DEVICE CLEANING AND MAINTENANCE
9
The following operations must be exclusively performed by
Technical Assistance Service
It is recommended to clean the glass once a year, as the deposit
of dust and leaves reduces system efficiency.
The collector must be cleaned with water or water and soap. Dry
the collector at the end of cleaning operations.
0
Do not use abrasive products, petrol or triethylene.
The heat transfer fluid must be checked every 2 years to verify
the effectiveness of water and glycol mix, including its pH value.
− Check the antifreeze with the suitable instrument - re-
fractometer or hydrometer- (nominal value approx.
-30°C): if the limit value of -26°C is exceeded, replace or
top-up the antifreeze.
− Use litmus paper to check the pH (nominal value approx.
7.5). If the measured value is below 7, change the heat
transfer liquid.
Check the integrity of insulation and expansion joints.
15 RECYCLING AND DISPOSAL
The device is primarily composed of:
Material Component
Glass Cover
Brass - Copper - Aluminium Absorber
Glass wool Insulation
Aluminium - Steel External frame
Silicone - PA66
Sealing elements of
connections
At the end of the device's useful life, these components must be
separated and disposed of according to current regulations in
the country of installation.