Viessmann Vitocal 300-G Installation And Service Instructions Manual page 84

Installation sequence
Electrical connections
Plug sXF
Terminals Function
224.6 ■ Cylinder primary pump
(DHW side)
■ 2-way shut-off valve
M
224.7 Circulation pump for DHW
reheating
or
Immersion heater control
Immersion heater (400 V~)
224.7
B
X2.N
A Immersion heater, power supply
3/N/PE 400 V/50 Hz
84
(cont.)
Explanation
Switch cylinder primary pump and two-
way shut-off valve in parallel
Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
Connection values
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
L1 L2 L3 N
?
A
B Terminals of the heat pump control
unit