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6. Piping installation
Installer reference guide / Mono tank integrated type
57
DHW
Ø 22 mm
NOTE
Secondary connection is only possible with 260L
Setting the pre-pressure of the expansion vessel
Water volume
• The indoor unit has an expansion vessel of 8 liter with a factory-set pre-pressure of 1 bar.
• To make sure that the unit operates properly:
–
You might need to adjust the pre-pressure of the expansion vessel.
–
You must check the minimum and maximum water volume.