Immergas BASIC MAGIS PRO Instructions And Warnings page 74

1.20 MAIN COMPONENTS SOLAR HEATING SYSTEM COUPLING KIT (OPTIONAL).
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Key:
1 - Expansion vessel / Expansion tank
2 - Solar control unit
3 - Plate heat exchanger
4 - Circulation unit
5 - Safety valve
6 - Can
7 - Interception cock
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