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I-38
B-070343_EN • B
P
roduct
I
nstallatIon
Isolating valve
Filling valve
Draining valve
Check valve
Fig. 20. Cascaded Boilers, with External Domestic Hot Water Tank and Low Loss Header
Expansion vessel
Heating circuit pump
DHW circuit pump
Heating circuit
Low loss header
Drain
External DHW tank
Safety group (automatic air relief valve, manome-
ter, safety valve), connected to the sewer.
Hydraulic Connections - Cascaded boilers, with External Domestic Hot Water Tank and
Low Loss Header
Motorised 3-way valve (when needed for low temp systems)