Viessmann vitodens Technical Manual page 97

Accessories for the installation of Vitodens 300 with 49 and 66 kW
Straight-through gas valve R ¾"
with integral thermal safety shut-off valve
Heating circuit pump (variable speed)
"
VITODENS
Shut off valves
Set of ball shut-off valves (2 pieces)
G 1½"
Compression fittings (1 set)
incl. gasket
H G 1½" R 1"
H G 1½" R 1¼"
G1b "
R1"
or
R1a "
3.5 Installation accessories
Heating circuit
Solder fittings (1 set) G 1½" DN 35
incl. gasket
G1b "
DN35
300
3
97