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4.2.7. System 7 2 Collector arrays (east / west roof) - 1 Storage tank - 1 Pump - 1 Valve Terminal layout N R1 N R2 N n.c n.c. R3 1 L n.c. n.c. X Wire bridge 2 3 4 5 6 GND GND GND GND GND GND T3 L PE PE PE PE n.c. L T2 N T1 The loading strategy for storage tank (T3) is set to use temperature differential control at the factory and can be adjusted using the Parameter menu (chapter 4.4), or set to use target temperature control. Display screen 2.7 R2 Loading strategy Display R1 The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference between one of the two collector arrays (T1, T2) and the storage tank (T3) is exceeded. The switching valve (R2) is always set so that flow occurs through the warmer of the two collector arrays (T1, T2). The pump (R1) switches off as soon as the switch-off temperature difference between the two collector arrays (T1, T2) and the storage tank (T3) falls below the threshold or the maximum storage temperature is reached. 230 V ~ 115 V ~ Description Note: When no voltage is on the system, the switching valve (R2) must be set to collector array 1 (T1). Storage tank 1 ay rr 1 ra y ar or ct ra lle o ct lle Co 2 Co T1 T1 T2 R2 T3 R1 T1 = Temperature sensor for collector array 1 T2 = Temperature sensor for collector array 2 T3 = Lower temperature sensor for storage tank 1 R1 = Solar circuit pump 1 R2 = 3-way switching valve 1 714.884 | 05.45 21 4
