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4
4
Connection diagram
Legend
1
Shutoff valve
2
Pressure-reducing valve
3
Safety valve
4
Return inhibitor with drainage
5
Pressure gauge connecting stubs
6
Outlet valve
7
Filter
8
Ventilation and de-aeration
9
Shutoff valve with drainage
10
Check valve
11
Load pump
12
Circulation pump (intermittent operation)
13
Straight valve with return inhibitor
14
Scalding protection according to DIN 806-2 and DVGW-W551
15
Return inhibitor
EN-4
Legend
CW
Cold water
C
Circulation
SF
Solar flow
SR
Solar return
T
Thermometer
HF
Heating Flow
HR
Heating return
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