Riello TAU Unit 50 Installation And Maintenance Manual page 76

CONFIGURATION OF CASCADED THERMAL UNITS
− Zone sensor (S2)
This is required to adjust and control an additional direct zone managed by the "Depending" thermal unit in combination
with the zone pump (P2).
The zone sensor (S2) and the pump (P2) must be connected to the "Depending" thermal unit, which communicates via Bus
with the "Managing" thermal unit.
DEPENDING
PC
− Zone sensor (S3)
This is required to adjust and control an additional direct zone in combination with an electronic device for zone
management (ZM) and the zone circulator (P3).
The zone sensor is used to adjust and control an additional mixed direct zone in combination with an electronic device for
zone management (ZM), the zone (P3) circulator and the mixer valve (V3).
The zone sensor (S3), the circulator (P3) and the mixer valve (if present) (V3) must be connected to the electronic device for
zone management (ZM), which communicates via Bus with the "Managing" thermal module.
DEPENDING MANAGING
BUS
PC
To make the electrical connections, refer to the wiring diagrams of the selected system.
For the Bus connection mode, refer to the section "System management".
SE/0-10V
MANAGING
BUS
SS
PC
SE/0-10V
SS
SC
PC
P2
PI
SC
EAF
P2
PI
ZM
V3
P3
EAF
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S2
TA/OT TA/OT
S2
TA TA/OT TA/OT
S3