Ferroli OPERA 70 Instrucciones De Uso, Instalación Y Mantenimiento página 163

OPERA
Generators in cascade: a direct heating circuit and a DHW circuit with circulating pump
Schematic diagram
The boiler electronics can manage up to a maximum of 6 modules. 3 are given in the example.
138
M
MASTER
R
Legend (fig. 49 and fig. 50)
72 1st zone (direct) room thermostat
130 Hot water tank circulating pump
138 External probe
155 Hot water tank probe
298 Cascade temperature sensor
300MMASTER boiler motorized butterfly valve
A = OPENING PHASE
B = NEUTRAL
C = CLOSING PHASE
300S SLAVE boiler motorized butterfly valve
• 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)
• If a cascade probe (not supplied) is used, it is necessary to purchase the accessory NTC probe code
1KWMA11W (2 mt.) or code 043005X0 (5 mt.)
EN
M M
300M 300S
M
SLAVE 1 SLAVE 2
R
cod. 3541R963 - Rev. 00 - 09/2021
I*
M
300S
M
R
fig. 49
A = OPENING PHASE
B = NEUTRAL
C = CLOSING PHASE
306 1st zone (direct) circulating pump
a 1st zone (direct)
b Hot water tank circuit
M Flow
R Return
I* ISPESL safety devices (when required - not su-
pplied)
72
a b
306 130
298
155
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