Viessmann Vitocal 350-A Installation And Service Instructions Manual page 24

Type awh-i, awh-o air/water heat pump with electric drive, 400 v~
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Preparing for installation
External heat pump type AWH-O
(cont.)
Note
Before laying the concrete foundations,
trim the hydraulic connection pipes
(heating water flow and return), install
the connection fittings and provide frost
protection.
24

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