6
Water circuit
WATER CIRCUIT
1
Solar collector
2
Storage cylinder
3
Collector probe
4
Disconnect valves
5
Non-return valve
6
Temperature gauge
7
Vent valve
8
Safety valve
9
Pressure gauge
10
Drain
11
Expansion vessel
12
Pump
13
Flow regulator
14
Flow meter
15
Vent cock
16
Manual bleed valve (acces-
sory)
17
Storage cylinder bottom
temperature sensor
18
Storage cylinder top tem-
perature sensor
19
Plugs
20
Heat transfer fluid recovery
M
Collector outlet
R
Collector return
4
4
4
8
11
10
12
7
5
20
M
9
°C
6
T
M
2
Solar
Regolator
17
15
16
18
3
R
1
1
19
19
Water control system
13
14
b
If copper pipes are used, joints must be hot brazed.
b
We recommend the use of stainless steel pipes spe-
cially made for solar collectors for the outlet, return
and probe pipes. The probe cable should be of the
shielded type.
b
Do not use plastic or multistrate pipes. Operating
temperature can exceed 180°C.
b
Pipe lagging must be able to resist high temperatures
(180°C).
Pressure drop in solar collectors (*)
12
10
8
6
4
2
0
0
50
100
150
200
250
300
350
400
Pressure drop (mbar)
Flow rate (l/h)
(*) With antifreeze-water mix of 33,3% / 66,7% and heat transfer medium temperature = 20°C.
