Ferroli OPERA 70 Instrucciones De Uso, Instalación Y Mantenimiento página 158

A direct heating circuit and a DHW circuit with diverter valve (3-wire)
- Schematic diagram
Use diverter valves with 3 wires: OPENING PHASE 230V - CLOSING PHASE 230V - NEUTRAL with switching times
(from fully closed to fully open) not exceeding 90 seconds
138
- 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.
B
To avoid damaging the board, it is advisable to use external relays to control
the 3-way valve, as indicated in fig. 44.
Legend (fig. 43 and fig. 44)
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
To manage the sliding temperature it is necessary to purchase the external probe accessory code 013018X0
If a hot water tank probe (not supplied) is used, it is necessary to purchase the NTC probe accessory code
1KWMA11W (2 mt.) or code 043005X0 (5 mt.)
If a hot water tank thermostat (not supplied) is used, it is necessary to purchase the accessory kit code
013017X0 (to be connected in place of the Hot Water Tank Probe)
158
M
I*
R
fig. 43
cod. 3541R963 - Rev. 00 - 09/2021
155
b
348
M
32
B = NEUTRAL
C = CLOSING PHASE
a 1st zone (direct)
b Hot water tank circuit
M Flow
R Return
I* ISPESL safety devices (When required - Not su-
pplied)
OPERA
72
a
EN