Ferroli MACH Instrucciones De Uso página 318

A direct heating circuit and a DHW circuit with diverter valve (3-wire)
- Schematic diagram
Use diverter valves with 3 wires:
- 230V OPENING PHASE
- 230V CLOSING PHASE
- NEUTRAL
with switching times (from all closed to all open) of not more than 90 seconds.
Legend (fig. 47 and fig. 48)
32 Heating circulating pump
72 1st zone (direct) room thermostat
138 External probe
155 Hot water tank probe
348 3-way valve (3-wire)
A = OPENING PHASE
B = NEUTRAL
C = CLOSING PHASE
to 1st zone (direct)
- Electrical connections
After installation, carry out the necessary electrical connections as shown in the wiring diagram.
Then configure the controller as described in the specific section.
To avoid damaging the board, it is advisable to use external relays to control
B
the 3-way valve, as indicated in fig. 48.
318
fig. 47
b
M
R
K1 - K2coil 230 Vac, <2.2 VA
I*
cod. 3541V120 - Rev 00 - 09/2021
Hot water tank circuit
Flow
Return
contact 230Vac, > 8A
ISPESL safety devices
(When required - not supplied)
MACH
EN