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4 CONNECTIONS
Connections
Collectors in the same line must be connected so that the heat transfer fluid flows through them in series. The pipe to the heat
exchanger in the storage cylinder must be connected to the outlet with the temperature sensor socket on the last collector in the
line (see figure).
Lines of solar collectors can be connected either in series (provided each line contains no more than 6 collectors) or in parallel. The
complete circuit must always be hydraulically balanced. See the following sample layouts.
Two lines in series
T
Diameter of connection pipes for a specific flow rate of 30 lt/m
Total surface area (m
2
)
Diameter of copper pipe (mm)
Diameter of steel pipe (inch)
Two lines in parallel
T
h
2
2 - 4
10 - 12
3/8" - 1/2"
5
When tightening a fitting,
HOLD THE OPPOSITE
FITTING STEADY WITH
A SECOND TOOL
to avoid damage
6 - 12
14
1/2"
14 - 20
18
3/4"
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