Cascade System Plumbing Connections - Ferroli EGEA TECH 200 HT Manual

EGEA TECH

8.7.2 Cascade system plumbing connections

The following figures (fig. 61 - fig. 62 - fig. 63) show 3 examples
of hydraulic connection.
5
11
16 17
11
1
11 10 12 10 17
fig. 61 ­ Example of water system WITHOUT thermostatic mixing valve
Legend
1 Inlet tube
4 Recirculation water inlet
5 Hot water outlet pipe
6. Solenoid valve for recirculation with cascade (nor-
mally open 230Vac-50Hz)
9 Inspectable end of the exhaust pipe
10 Pressure gauge
11 Shut-off valve
Note:
1) The recirculation pump (part.16) must be connected to terminal CN26 of the master motherboard (ref. "fig. 69 - Wiring diagram of the equipment" on page 180).
2) Fit a normally open solenoid valve (part. 19) for each unit in the cascade. The valve must be connected to terminal CN14-1 (ref. "fig. 69 - Wiring diagram of the
equipment" on page 180) of the mother board of each unit.
3) If recirculation is provided, a normally open solenoid valve (part. 6) must also be fitted for each unit in the cascade. The valve must be powered in parallel with the
normally open solenoid valve (part. 19).
200 HT - 260 HT
6
11
11
19
11
13
14
15
21
12 Pressure regulator
13 Safety valve
14 Expansion vessel
15 Drain cock
16 Recirculation pump
17 Non-return valve
18 Thermostatic mixing valve
19 Solenoid valve for cascade water inlet manage-
cod. 3540000420 - Rev. 03 - 09/2023
6
11
11
19
11
13
14
15
21
20
6
11
11
19
13
14
15
21
ment (normally open 230Vac-50Hz)
20 Exhaust manifold
21 Siphon
22 Unloading on the ground
Cascade management serial connectionsa
Electrical connections
EN
4
22
175