Source Water System (Fig. 43); Filling And Emptying; Device Cleaning And Maintenance; Recycling And Disposal - Riello Collector 2.0 Installer Manual

Use the installed rail as a guide and insert the hydraulic connec-
tions into the tubes. Install and tighten the collector bolts (Fig. 40).
Adjust if necessary the position of the feet so that they are in line
with the rest. Mark and drill holes for the installation of the anchors
(Fig. 41).
Install the anchors and tighten. When the installation of the array
is finished, tighten the hydraulic fittings, taking care not to exert
excessive force on the pipes so as not to damage the absorber
(Fig. 42).
Seal all anchors for moisture and water ingress by appropriate
means for the roof material and operating conditions.
9
Do not remove the collector cover! Remove it only after the
collector has been connected and filled with heat transfer
fluid.
Diameter of connection pipes for a specific flow rate of 50 lt/
m h
2
Total surface area (m )
2
Diameter of copper pipe
(mm)
Note: Recommended range in hotter climates
Diameter of connection pipes for a specific flow rate of 30 lt/
m h
2
Total surface area (m )
2
Diameter of copper pipe
(mm)
Note: Recommended range in colder climates
9
Do not fix the ends of lines of solar collectors rigidly: leave
them free to absorb thermal expansion.

15 SOURCE WATER SYSTEM (Fig. 43)

9
If copper pipes are used, joints must be hot brazed.
9
We recommend the use of stainless steel pipes specially made
for solar collectors for the outlet, return and probe pipes. The
probe cable should be of the shielded type.
9
Do not use plastic or multistrate pipes. Operating temperature
can exceed 180°C.
9
Pipe lagging must be able to resist high temperatures (180°C).

16 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 tempera-
tures in stagnation conditions, consider these things when choos-
ing 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 residues.
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).
STEP 11
STEP 12
STEP 13
2 - 4 6 - 12 14 - 20
12 - 16 18-22
2 - 4 6 - 12 14 - 20
10 - 16 18-22
9
For system washing, filling and emptying, follow the instruc-
tions contained in the manual of the matched solar station.
9
Filling, emptying and venting must be carried out with collec-
tors at ambient temperature and protected from solar radiation
(Fig. 44).

17 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 - refrac-
tometer or hydrometer- (nominal value approx. -30°C): if
22-35
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.
22-35

18 RECYCLING AND DISPOSAL

The device is primarily composed of:
Material
Glass (low iron, mistlite,
tempered)
Brass - Copper - Aluminium
Rock wool
AlloySteel
Colofast
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.

19 END USER INSTRUCTIONS

Refer to the GENERAL SAFETY INFORMATION and PRECAU-
TIONS section for safety-related information.
EXTERNAL MAINTENANCE
It is recommended:
− To clean the glass once a year, as the deposit of dust and
leaves reduces system efficiency
− To check the heat transfer fluid to verify its effectiveness
every two years
− To check the integrity of solar collector insulations and any
expansion joints, every two years.
For cleaning operations and solar collector efficiency check,
contact the nearest Technical Assistance Service.
19
ENGLISH
Component
Cover
Absorber
Insulation
External frame
Sealing elements of connections