Viessmann Vitocal 300-G Installation And Service Instructions Manual page 34

Installation sequence
Electrical connection
Plug
sXD
Terminals Function
223.1 Central fault message
223.2
U
Central fault message
223.1
230V~, 0.5 A
A
223.2
Fig. 27
Terminals on extension PCB
A
Plug sXF
Terminals Function
224.2 Primary pump for heat pump stage 2
2.
224.3 Secondary pump for heat pump
stage 2
2.
224.4 Switching an instantaneous heating
water heater, stage 2
2.
r
224.5 Circulation pump for cylinder heating
for heat pump stage 2
2.
224.6
Cylinder loading pump (DHW side)
2-way shut-off valve
M
34
(cont.)
L1
N
Explanation
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
■
Explanation
Connection values
Output: 200 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
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
■