Cross Connect Pcb - Viessmann Vitocal 350-A AWHO 351.A Series Installation And Service Instructions Manual

Installation sequence
Heat pump control unit electrical connections
Immersion heater EHE 400 V~
224.7
B
X2.N
A
Fig. 52
Immersion heater EHE, power supply 3/N/PE
A
400 V/50 Hz
Terminals of the heat pump control unit
B
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

Set the required parameters during commissioning;
see from page 73.
Signal and safety connections
Terminals Function
F1 Fuse 6.3 A (slow)
X1 Earth conductor X1.
X2 Neutral conductor X2.N
52
N
L1 L2 L3
?
?
(cont.)
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
■
Explanation
Terminals for earth conductors of all associated
system components
Terminals for neutral conductors of all associated
system components