47
Terminals
No. in
dia-
gram
Function
Explanation
552XD5
1: R+
2: R–
PE: Shield connection
iI
Flow temperature sensor
NC/AC
Pt1000
552XD7
1: R+
2: R–
PE: Shield connection
iZ
Temperature sensor, heat
exchanger, residual heat,
water outlet
Pt1000
553XD1
1: R+
2: R–
PE: Shield connection
r-U
Temperature sensor, heat
exchanger, residual heat,
brine inlet
Pt1000
553XD3
1: R+
2: R–
PE: Shield connection
wE
Temperature sensor, main
flow, heating circuits
Pt1000
553XD5
1: R+
2: R–
PE: Shield connection
eQ
DHW cylinder temperature
sensor, bottom
Pt1000
553XD7
1: R+
2: R–
PE: Shield connection
eT
DHW cylinder temperature
sensor, top
Pt1000
554XD1
1: R+
2: R–
PE: Shield connection
eI
Temperature sensor, DHW
heating, high temperature
maintenance
Pt1000
554XD3
1: R+
2: R–
PE: Shield connection
q-Q
Flow temperature sensor,
heating/cooling circuit 1
Pt1000
554XD5
1: R+
2: R–
PE: Shield connection
w-Q
Flow temperature sensor,
heating/cooling circuit 2
Pt1000
554XD7
1: R+
2: R–
PE: Shield connection
e-Q
Flow temperature sensor,
heating/cooling circuit 3
Pt1000
555XD1
1: R+
2: R–
PE: Shield connection
u-Q
Flow temperature sensor,
heating/cooling circuit 4
Pt1000
555XD3
1: R+
2: R–
PE: Shield connection
t-Z
Temperature sensor, NC
parallel
Pt1000
600XD1
1: 24 VDC
2: Signal (digital)
2
Peak block, heat pump
External N/O contact
Potential 24 VDC from heat pump
Closed: Active
Installation sequence
Electrical connections
(cont.)
5855865
Installation
Summary of Contents for BW 352.B027
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