Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 39

Connecting refrigerant lines
2x
5.
(cont.)
5. Flare the pipe bends on their open
end and secure connection piece
(twin nipple) with union nuts.
Note
■ Flare the pipe end of the hot gas
line by approx. 0.5 mm.
■ Connection pieces must not be
positioned diagonally. Check the
flared connections for firm seating.
Installation sequence
39