Hisense AHM-080HCDSAA - Page 476

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Hi-Therma Monobloc System (AHZ-044/080HCDS1)
3. 
bottom of the expansion vessel, and loosen the Hexagon nuts on the top of the expansion vessel. Pay attention to
protect the gasket.
4. Remove the expansion vessel assembly.
5. Remove the expansion vessel.
Screws
Nut
Screws