Viessmann VITOCAL 242-S Installation And Service Instructions Manual page 32

Installation sequence
Connecting refrigerant lines
2x
5.
32
(cont.)
5. Flare the pipe bends on their open
end and secure connection piece
(twin connector) 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.