2.8
MODBUS mode
(fig. 10 - fig. 10/a)
This. mode. enables. boiler. MODBUS.
communication. and. can. be. achieved. by.
requesting. the. RS-485. board. supplied.
with.the.kit,.code.8092244.
To.install.the.board,.proceed.as.follows:
-. Install. the. RS-485. board. in. the. rele-
vant.seat.on.the.control.panel.and.con-
nect.it.electrically.to.the.boiler.board.
with. the. wired. connector. provided. in.
the.kit.
ATTENTION: Insert the wired connec-
tor with caution.
-. Set. the. DIP. SWITCH. of. the. board. in.
MODBUS.mode.
-. Choose. the. communication. configu-
ration.suited.to.the.MODBUS.network.
(PAR.17.INST).according.to.Table PAR
17 INST.
2.8.1
Anti-freeze function
The.boilers.are.equipped.with.anti-freeze.
function. which. activates. the. pumps. and.
the. burner. when. the. temperature. of.
the.water.contained.inside.the.appliance.
drops.to.below.6°C..
The. anti-freeze. function. is. ensured,.
however,.only.if:
-. the. boiler. . is. correctly. connected. to.
the.gas.and.electricity.supply.circuits;
-. the.boiler.is.constantly.fed;
-. the.boiler.ignition.is.not.blocked;
-. the.essential.components.of.the.boiler.
are.all.in.working.order.
In. these. conditions. the. boiler. is. protec-
ted.against.frost.down.to.an.environmen-
tal.temperature.of.-5°C.
ATTENTION: In the case of installation
in a place where the temperature drops
below 0°C, the connection pipes must
be protected.
84
R
M
SE
TA3
TA1
SE
SI
RL3
P3
P2
TA2
IP
EXP
VM
EXP
IP
P4
TA4
RL4
TA1
TA2
SI
R
M
SE
TA1
TA2
TA2
SE
TA
P2
RL
RL1
RL2
P1
P
CR
CR
R
M
SE
CT2
TA1
SE
CT1
TA2
VZ1
VZ2
ZONA
GIORNO
(70°C)
ZONA
NOTTE
(50°C)
R
M
SE
CT2
TA1
SE
CT1
SI
RL2
P2
P1
TA2
RL1
ZONA
GIORNO
(70°C)
ZONA
NOTTE
(50°C)
R
M
SE
TA2
TA1
SE
TA1
SI
RL2
P2
P1
TA2
CR
CR
EXP
VM
EXP
R
M
SE
TA2
TA1
SE
TA1
SI
RL2
P2
P1
PB
RL1
BOLLITORE
PB
SB
SB
IP
R
M
SE
TA1
TA2
TA1
SE
TA
P2
RL
SI
RL1
RL2
P1
P
TA2
SE
R
M
SE
VZ
VZ1
TA2
VZ2
CR
CR
VZ1
TA1
TA2
SE
R
M
SE
TA
VZ
TA1
VZ1
TA2
VZ2
CR
CR
TA1
SE
R
M
SE
TA
VZ
TA1
VZ1
TA2
VZ2
R
M
SE
TA
CR
TA1
CR
SE
R
M
SE
CR
CR
SE
SB
M2 R2
SB
BOLLITORE
S1
SB
S2
R
M
SE
TA1
SE
SI
P1
TA2
EXP
VM
EXP
IP
TA1
TA2
P2
VM
IP
EXP
EXP.(INSOL)
Vers..BFT./.T
R
M
SE
TA1
SE
SI
P1
TA2
EXP
VM
EXP
IP
TA1
TA2
P2
VM
IP
EXP
8
SYSTEM WITH DOUBLE TEMPERATURE OUTPUT
MULTI-ZONE SYSTEM WITH PUMP AND CHRONOTHERMOSTAT
DAY
ZONE.
(70°C)
NIGHT
ZONE
(50°C)
x 2
CN10
CHIAVE
POLARIZATION
Fig..10
