Viessmann Vitocal 350-A AWHI 351.A14, Инструкция по установке и обслуживанию

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52
Immersion heater EHE 400 V~
224.7
X2.N
N L3 L2 L1
?
B
A
Fig. 52
A
Immersion heater EHE, power supply 3/N/PE
400 V/50 Hz
B
Terminals of the heat pump control unit
Plug
sXG
Terminals Function Explanation
225.1
M2
r
Heating circuit pump of the heating
circuit with mixer M2/HC2 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
225.2
M2
Mixer motor control, heating circuit
M2/HC2
Signal mixer CLOSE Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
225.3
M2
Mixer motor control, heating circuit
M2/HC2
Signal mixer OPEN Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
Cross connect PCB
Set the required parameters during commissioning;
see from page 73.
Signal and safety connections
Terminals
Function Explanation
F1 Fuse 6.3 A (slow)
X1 Earth conductor X1.
?
Terminals for earth conductors of all associated
system components
X2 Neutral conductor X2.N Terminals for neutral conductors of all associated
system components
Installation sequence
Heat pump control unit electrical connections
(cont.)
5692878
Installation