4.3 Hydraulic circuit
10 System flow
11 System return
14 Safety valve
32 Heating circulating pump
34 Heating temperature sensor
36 Automatic air vent
56a Expansion vessel (Present as standard
in the 18H - 28H - 34H models)
74 System filling faucet
95 Diverter valve
186 Return sensor
193 Trap
196 Condensate tray
209 Hot water tank delivery
210 Hot water tank return
231 Filling connection
241 Automatic bypass (inside pump unit)
294 Pressure transducer
332
196
34
294
14
56b
209
10
fig. 62- Hydraulic circuit
cod. 3541V484 - Rev 02 - 01/2024
BlueHelix HiTech RRT H
193
241
74
231
210
11
56b Position of the connection to be used
for the external expansion tank in 45H
models (to be done by the installer)
186
36
56a
32
95
EN