Hydraulic circuit
PPS BUS
KEY
UA
Zone room unit (QAA70)
PZ
Zone pumps
1–n
SI
Hydraulic separator
SZ
Zone feeler (QAD21 / QAZ21)
VM
3–way mixing valve
Wiring diagram
L
PZ2
N
ponticello Albatros inserito
KEY
SE
External feeler (QAC31)
UA
Zone room unit (QAA70)
PZ
Zone pump
1–n
SZ
Zone feeler (QAD21 / QAZ21)
VM
3–way mixing valve
Tmax Thermostat for excess temperature
CRL
Zone contacts
2–n
TA
Zone room thermostats
2–n
SE
UA
RVA
46.531
QAA 70
VM
PZ1
TMAX
SI
SZ
TAn
TA2
RLn
RL2
PZn
SB
SB
SE
SE
–
SCHEDA
CR
CALDAIA
CR
+
TA
TA
L
N T
L
N
T
TA2
RL2
PZ2
PZn
IP
Tmax Thermostat for excess temperature
IP
Floor installation
SE
External feeler (QAC31)
TA
Zone room thermostats
2–n
RL
2–contact zone relay
2–n
CRL2
CRLn
ALBATROS RVA46.531
VM
N
L
TAn
RLn
UA
QAA 70
D6 D5 D4 D3 D2 D1
+
–
SE
SZ
–
+
TMAX
PZ1
71