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5 Before installation
Fig.16
System 5
S4
R3
S3
Tab.6
Pipe diameter with a 30% glycol concentration at 40 °C
Number of collec
Solar capture sur
tors
face area (m
1
2
2
4
4
8
6
12
8
16
10
20
12
24
14
28
18
Solar hydraulic unit
Standard solar power system with pool and heating circuit for SH 7
Compact Top model.
S1
R1
S2
BA-0000088-01
5.3.4
To size the piping, it is recommended that the linear pressure drop of the
pipes does not exceed 40 mmH2O/m and the maximum speed does not
exceed 2 m/s (the design flow rate taken into account is between 30 l/h·m
and 60 l/h·m
Maximum flow rate
2
)
(l/h) (50 l/h·m
100
200
400
600
800
1000
1200
1400
5.3.5
BAXI heat transfer fluid can be used to fill the installation, in the correct
concentration for the minimum foreseeable outdoor temperature in the
location. It is recommended that you use a mixture of water and glycol in
the following proportions:
Tab.7
The solar system is used to provide DHW and heating as a priority and,
once this demand has been met, any surplus heat is used to heat the
pool. The solar system heats a hot water cylinder which serves as a
buffer tank. This buffer tank is used to heat the domestic hot water and
simultaneously transfer heat to the heating circuit return. The assigned
relay is connected when the difference in temperature between the
buffer tank and the return is greater than the connection temperature
difference. Also, when the buffer tank reaches the setpoint temperature,
if the collectors sensor S1 is greater than the pool sensor S4, the
second primary pump is activated, thereby using the surplus solar power
to heat the pool.
Pipe diameter calculation
2
)
Recommended diameter
2
)
Nominal diameter
Dia. 10x1.0
Dia. 15x1.0
Dia. 18x1.0
Dia. 22x1.0
Dia. 22x1.0
Dia. 28x1.5
Dia. 28x1.5
Dia. 28x1.5
Quantity of antifreeze
Concentration of heat transfer fluid
Volume of heat transfer fluid
Minimum outdoor temperature
Importante
Under no circumstances should the mixture of water and glycol
exceed 40%.
V (m/s)
ΔP (mmH2O/m)
0.55
88.5
0.42
29.3
0.55
36.0
0.53
25.2
0.71
41.4
0.57
21.2
0.68
29.1
0.79
38.0
26%
33%
-10 °C
-15 °C
7729335 - 04 - 12052021
2
37%
-20 °C
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