Installation, operation and maintenance instructions - DualSun XXXM
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60
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3BBP
V1.2
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March 2020
Page
10
sur
41
The following values are derived from measurements with water at 40°C
Figure 6 :
Pressure loss curves for DUALSUN Spring XXXM
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60
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3BBPN panels in portrait with DN26 fittings
2.3.6
Recommended flow rates
Nominal flow rates
:
Application
DHW
*
Thermal discharge
**
Direct pool heating
Nominal flow rate (L/h/panel)
32
100
200
* DHW : Domestic hot water
** Thermal discharge: Pressurised system with thermal exchanger or geothermal probes coupling
Minimum filling flow rate:
-
Panel in portrait mode: 200 L/h/panel
-
Panel in landscape mode: 250 L/h/panel
Maximum permissible flow rate:
400 L/h/panel
The choice of the flow rate directly impacts the hydraulic pressure.
2.3.7
Maximum authorized pressures
It is imperative never to exceed the following pressures in the DualSun panels:
Maximum service pressure = 1,5 bar
Maximum filling pressure = 2 bar
The maximum filling pressure corresponds to the pressure allowable in the panels to purge correctly the air during
hydraulic commissioning.
The temperature of the panels must be between 10 and 45°C during commissioning.
The pressure can be raised to 2 bar during a few minutes only
.
At the end of the commissioning
of the
installation, the maximum service pressure to set is
1,5 bar
.
0
500
1000
1500
2000
2500
3000
0
50
100
150
200
250
300
350
400
PL
(mmWS
)
Flow rate (L/h/panel)
Pressure loss- DN 26 fittings (Water @ T=40°C)
1
2
3
4
5
6
Number
of
pan
el
s
PORTRAIT
