Viessmann BW 301.B06, Installation And Service Instructions Manual

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34
Plug sXD
Terminals Function Explanation
223.1
223.2
U
Central fault message Floating contact:
■
Closed: Fault
■
Open: No fault
■
Not suitable for safety LV
Connection values (contact rating):
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Central fault message
223.1
L1
230V~, 0.5 A
N
223.2
A
Fig. 27
A
Terminals on extension PCB
Plug sXF
Terminals Function Explanation
224.2
2.
Primary pump for heat pump stage 2 Connection values
■
Output: 200 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
224.3
2.
Secondary pump for heat pump
stage 2 Connection values
■
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
224.4
r
2.
Switching an instantaneous heating
water heater, stage 2 Connection values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
224.5
2.
Circulation pump for cylinder heating
for heat pump stage 2 Connection values
■
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
224.6 Connect cylinder loading pump and 2-way shut-off
valve in parallel.
Connection values
■
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Cylinder loading pump (DHW side)
M
2-way shut-off valve
Installation sequence
Electrical connection
(cont.)
5516461
Installation