Riello RPS 25/4 Installer, Technical Assistan Ce Service And User Manual page 11

INSTALLATION
Vertical configuration
Collectors are connected with each other so that the heat trans-
fer fluid crosses them in parallel. Connection with the heat ex-
change circuit towards the exchanger must be made on the side
of probe socket (T) of the last collector of the series (see figure).
The positioning of the socket on the collector allows the maxi-
mum transfer of heat accumulated in the panels.
It is also possible to connect more than one line of solar collec-
tors, both in series (provided that the number of solar collectors
does not exceed 10 units per each series) and in parallel. In any
case the circuit must be hydraulically balanced (see the follow-
ing example diagrams).
Two lines in series
Vertical configuration
T
Horizontal configuration
T
Diameter of connection pipes for a specific flow rate of 30 lt/m
Total surface area (m
Diameter of copper pipe (mm)
Diameter of steel pipe (inch)
9
Do not fix the ends of lines of solar collectors rigidly: leave them free to absorb thermal expansion. If this is not possible, fit an
expansion joint at each end.
T
) 2 - 4
2
10 - 12
3/8" - 1/2"
Horizontal configuration
Collectors in the same line must be connected so that the heat
transfer fluid flows through them in series. Connection with the
heat exchange circuit towards the exchanger must be made on
the side of probe socket (T) of the last collector of the series (see
figure).
Lines of solar collectors can be connected either in series (pro-
vided each line contains no more than 6 collectors) or in paral-
lel. The complete circuit must always be hydraulically balanced.
See the following sample layouts.
Connection between collectors must be carried out only using
the junction connector (including the proper insulation) sup-
plied separately. This connector is used as expansion joint be-
tween collectors.
Two lines in parallel
Vertical configuration
T
Horizontal configuration
h
2
6 - 12
14
1/2"
11
INSTALLATION
T
14 - 20
18
3/4"