19
│
Maximum of 5 collectors may be connected with threaded
fi
ttings in a row. The next collector shall be connected
via a compensator. Further max. 3 collectors may follow, connected with threaded
fi
ttings. It is advisable to
keep the connection piping from collectors as short as possible. The recommended pipe diameters and
fl
ow
rates through collectors in different connection schemes are shown in Tab. 1.
All solar components must be carefully and safely sealed and must be made of material resistant to glycol and
temperatures up to 160 °C.
For connection piping we recommend using KOMBIFLEX stainless-steel
fl
exible pipes, or copper pipes
connected by soldering.
In no event plastic tubes can be used for inlet/outlet piping as they do not meet
the requirements for solar systems.
Pipes for collectors can be lead through disused chimneys, ventilation shafts or grooves in a wall. In order to
prevent high thermal losses through convection, open shafts shall be properly sealed. Also thermal dilatation
shall be remembered and pipes
fi
tted with compensators or other compensation elements. Piping shall be
connected to the house earthing.
Pipes of the solar system must be
fi
tted with thermal insulation e.g. of AEROFLEX type, so that thermal
dissipation from the pipes does not deteriorate a total ef
fi
ciency of the solar system. The thermal insulation
must be resistant to temperatures up to 160 °C, for outdoor piping also a UV protection is essential as well as
non-deliquescence of the material. For indoor piping, the thermal insulation should be at least 13 mm thick, for
outdoor piping at least 19 mm.
6
Temperature Probe Positioning
• place the thermal probe into the pocket of the T- or X-piece at the outlet from the last collector, see pic. 27
• use a twisted wire 2x1 mm
2
, non-shielded, separated from power cables.
Its maximum length is 100 m. Minimize the number of electrical boxes a terminal blocks
connection length: up to 25 m cross section: 0.25 mm
2
connection length: up to 50 m cross section: 0.5 mm
2
connection length: up to 100 m cross section: 1.0 mm
2
• the thermal and mechanical resistance of the wire used must correspond to the environs the wire passes
through
Pic. 27: Position of a temperature probe
Tab. 1: Recommended pipe diameters
Number of collectors Connection scheme
Flow rate
Connecting pipes
Max. pipe length
1
1 x 1
2 l/min
Cu 18 x 1
Max. 30 m of the inlet
and outlet piping
together
5
1 x 5 in series
10 l/min
Cu 18 x 1
6
2 x 3 in parallel
12 l/min
Cu 18 x 1
8
2 x 4 in parallel
16 l/min
Cu 22 x 1
9
3 x 3 in parallel
18 l/min
Cu 22 x 1
10
5 x 2 in parallel
20 l/min
Cu 28 x 1.5
12
4 x 3 in parallel
24 l/min
Cu 28 x 1.5
Содержание KPC1-BP
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