13
Fig.
№
. 6
The boiler VIADRUS A3W ((right-hand design with the small tank) with open fuel tank
4.3
Hydraulic connection diagram
For larger heating system it is suitable to use an alternative connection to the heating circuit, as with the variant Z1.
Fig.
№
. 7
Hydraulic diagram with HW preparation – pump heating circuit
Three-way ball valve SIEMENS min. DN 25
with reversible actuator - 2-point control (do
not use the actuator with return spring)
El. heating
controlled
separately
Combined
storage water
heater
