Viessmann Vitocal 350-A Installation And Service Instructions Manual page 214

Type awh-i, awh-o air/water heat pump with electric drive, 400 v~
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Connection and wiring diagrams
Safety chain, control circuit, main power...
Example:
3X1.2:
PCB 3, terminal strip X1, termi-
nal 2
1X1.?: PCB 1, terminal strip X1, any
earth terminal
1X2.N: PCB 1, terminal strip X2, any
neutral conductor terminal
214
(cont.)

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