Cross Connect Pcb (Message And Safety Connections) - Viessmann Vitocal 300-G Series Installation And Service Instructions Manual

Installation sequence
Electrical connection
Control and power circuit of the instantaneous
heating water heater
L1
L2
L3
N
?
211.3
224.4
B
!
X2.N
?
Fig. 18
Instantaneous heating water heater
A
Connection to the main PCB and expansion PCB
B
211.3 stage 1
224.4 stage 2
Plug
sXG
Terminals Function
225.1 Heating circuit pump of the heating
circuit with mixer M2/HC2
M2
r
225.2 Mixer motor control, heating circuit
M2/HC2
M2
Signal mixer CLOSE
225.3 Mixer motor control, heating circuit
M2/HC2
M2
Signal mixer OPEN

Cross connect PCB (message and safety connections)

Set the required parameters during commissioning:
See page 50 onwards.
28
(cont.)
A
Immersion heater EHE 400 V~
224.7
B
X2.N
A
Fig. 19
Immersion heater EHE, power supply 3/N/PE
A
400 V/50 Hz
Terminals of the heat pump control unit
B
Explanation
Connect a temperature limiter to restrict the maximum
temperature for underfloor heating circuits (if installed)
in series.
Connection values:
Output: 100 W
■
Voltage: 230 V~
■
Max. control current: 4(2) A
■
Connection values:
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
■
Connection values:
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
■
N
L1 L2 L3
?