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2 ways ON/OFF valve (NC) primary by-pass circuit (solar)
Primary and secondary circuit circulators
100
90
80
70
60
50
40
30
20
10
0
2000
22004022 - 06.13
2-way ON/OFF motorised valve (ref.1), primary by-pass circuit, remains in closed position
while the system is operating in solar function.
When the temperature in the solar circuit (measured by S5 probe) goes below 0° C, the
relay 4 phase is activated in the regulator which opens the relative valve (ref.1) and at the
same time closes the output 2-way valve on the primary return circuit (ref.2), avoiding the
passage of the fluid inside the plate exchanger and also avoiding damages caused by icing.
Measuring range 0 - 10 bar / 0-100 °C
Immediate time response < 1,0 / 1,5 s
Maximum pressure > 30 bar
High-efficiency circulator of the primary circuit Wilo STRATOS PARA 30/1-12
High-efficiency circulator of the secondary circuit Wilo STRATOS PARA 30/1-8
(Check the characteristic curves of the circulators at page 4)
Electric connection:
- 4 control wires 0-10V and SSM
- 3 power wires 230V/ 50Hz AC
Alimentazione:
Black/brown:
L1, 230V/AC 50-60Hz
Light blue:
N, neutral
Yellow/green:
protective ground
Cavi di controllo:
Brown:
0-10V (signal return)
White:
0-10V (signal)
Blue:
SSM
Black:
SSM
Note: circulator data and values are available on the Wilo manual included in the packaging.
Secondary pump efficiency (%)
3000
4000
5000
11. Components
6000
7000
Portata secondario / Secondary flow rate (l/h)
Assembling instructions and maintenance
1
2
33
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