Viessmann BW 352.B027, Installation And Service Instructions Manual

Page: 39 / 84

39
Terminals No. in
dia-
gram Function Explanation
201XD3
1: Start command EB
2: Start command EB
3: Set value 0-10 V
4: GND
5: Operating message COM
6: Operating message NO
PE: Shield connection
5
Secondary pump control
signals Floating N/O contact:
Closed: Secondary pump demand
Open:
No demand
Signal 0 to 10 V
Contact closed:
Secondary pump operation
202XD1
1: Phase conductor L1
2: Phase conductor L2
3: Phase conductor L3
N: Neutral conductor
PE: Protective conductor
qU
Well circulation pump load,
groundwater Fuse protection from load fuse 104FC4 (ob-
serve the total current of max. 13 A)
Connection values:
■
Max. output: 4000 W/2200 W
■
Voltage: 400 V~/230 V~
202XD3
1: Start command EB
2: Start command EB
3: Operating message COM
4: Operating message NO
qU
Well circulation pump con-
trol signals, groundwater Floating N/O contact:
Closed: Well circulation pump demand,
groundwater
Open: No demand
Contact closed:
Well circulation pump operation, groundwater
203XD1
1: Phase conductor L1
2: Phase conductor L2
3: Phase conductor L3
N: Neutral conductor
PE: Protective conductor
iQ
Circulation pump load,
coolant buffer cylinder Fuse protection from load fuse 105FC1 (ob-
serve the total current of max. 16 A)
Connection values:
■
Max. output: 4000 W/2200 W
■
Voltage: 400 V~/230 V~
203XD3
1: Start command EB
2: Start command EB
3: Operating message COM
4: Operating message NO
iQ
Circulation pump control
signals, coolant buffer cyl-
inder Floating N/O contact:
Closed: Circulation pump demand, coolant
buffer cylinder
Open: No demand
Contact closed:
Circulation pump operation, coolant buffer
cylinder
204XD1
1: Phase conductor L1
2: Phase conductor L2
3: Phase conductor L3
N: Neutral conductor
PE: Protective conductor
r-Q
Circulation pump load, heat
exchanger, residual heat,
brine Fuse protection from load fuse 105FC1 (ob-
serve the total current of max. 16 A)
Connection values:
■
Max. output: 4000 W/2200 W
■
Voltage: 400 V~/230 V~
204XD3
1: Start command EB
2: Start command EB
3: Set value 0-10 V
4: GND
5: Operating message COM
6: Operating message NO
PE: Shield connection
r-Q
Circulation pump control
signals, heat exchanger,
residual heat, brine Floating N/O contact:
Closed: Circulation pump demand, heat ex-
changer, residual heat, brine
Open: No demand
Signal 0 to 10 V
Contact closed:
Circulation pump operation, heat exchanger,
residual heat, brine
Installation sequence
Electrical connections
(cont.)
5855865
Installation