Viessmann BW 352.B027, Installation And Service Instructions Manual

Page: 42 / 84

42
Terminals No. in
dia-
gram Function Explanation
213XD3
1: Start command EB
2: Start command EB
3: Operating message COM
4: Operating message NO
u-R
Heating circuit pump con-
trol signals, heating circuit
4 Floating N/O contact:
Closed: Heating circuit pump demand, heat-
ing circuit 4
Open: No demand
Contact closed:
Heating circuit pump operation, heating cir-
cuit 4
310XD1
1: Phase conductor
N: Neutral conductor
PE: Protective conductor
eR
Freshwater module load Fuse protection from load fuse 105FC1 (ob-
serve the total current of max. 13 A)
Connection values:
■
Voltage: 230 V~
380XD3
1: Start command EB
2: Start command EB
r-I
Air/brine heat exchanger
control signals Floating N/O contact:
Closed: Air/brine heat exchanger demand
Open:
No demand
Connection values:
■
Max. voltage: 250 V~
■
Max. switching current: 5 A (AC1)
(connection air/brine heat exchanger terminal
1, 2)
380XD4
1: Set value 0-10 V
2: GND
PE: Shield connection
r-I
Air/brine heat exchanger
control signals Signal 0 to 10 V
Connection air/brine heat exchanger terminal
X_CTRL
3: GND
4: Set value 0-10 V
380XD5
1: Operating message COM
2: Operating message NO
r-I
Air/brine heat exchanger
control signals Closed: Operation, air/brine heat exchanger
Connection air/brine heat exchanger terminal
X_CTRL
1: COM
2: NO
380XD7
1: Brine sensor COM
2: Brine sensor NO
z-Q
Brine sensor, drip pan, air/
brine heat exchanger Potential 24 VDC from heat pump
Open: Fault
Insert jumper if not installed.
430XD1
1: Valve OPEN
2: Valve CLOSED
3: 24 VDC
4: 0 VDC
PE: Protective conductor
3
2-way motorised damper,
heating water buffer cylin-
der outlet Connection values:
■
Voltage: 24 VDC
■
Max. switching current: 5 A
431XD1
1: Valve OPEN
2: Valve CLOSED
3: 24 VDC
4: 0 VDC
PE: Protective conductor
uP
2-way motorised damper,
primary circuit Connection values:
■
Voltage: 24 VDC
■
Max. switching current: 5 A
432XD1
1: Valve OPEN
2: Valve CLOSED
3: 24 VDC
4: 0 VDC
PE: Protective conductor t-P 2-way motorised damper,
primary circuit, cooling Connection values:
■
Voltage: 24 VDC
■
Max. switching current: 5 A
Installation sequence
Electrical connections
(cont.)
5855865
Installation