Bitzer HS.8851

SB-110-4 57
Screwed connections with aluminium gasket:
sealing screws, plugs and screwed nipples
Size
M10 30 Nm
M18 x 1.5 60 Nm
M20 x 1.5 70 Nm
M22 x 1.5 80 Nm
M26 x 1.5 110 Nm
M30 x 1.5 120 Nm
M48 x 1.5 300 Nm
G1/4 40 Nm ①
G1 1/4 180 Nm
①: Screwed nipple of pressure transmitter: 35Nm
Sealing screws or plugs with O-ring
Size
1 1/8-18 UNEF 50 Nm
M22 x 1.5 40 Nm
M52 x 1.5 100 Nm
Sealing nuts with O-ring
Thread AF
3/4-16 UNF 22 50 Nm
1-14 UNS 30 85 Nm
1 1/4-12 UNF 36 105 Nm
1 3/4-12 UN 50 150 Nm
2 1/4-12 UN 65 180 Nm
AF: width across flats in mm
10.2 Special screwed connections
10.3 Sight glasses
Also mind when mounting or replacing:
▶ Tighten sight glasses only with calibrated torque
spanner to indicated torque.
▶ Do not use a pneumatic impact wrench.
▶ Tighten flanges of sight glasses in several steps to
indicated torque.
▶ Check sight glass visually in detail before and after
mounting.
▶ Test changed component for tightness.
Sight glasses with sealing flange
Screw size
M8 14 Nm
M10 18 Nm
Sight glasses with union nut
Size AF
1 3/4-12 UN 50 150 Nm ①
2 1/4-12 UN 65 180 Nm
AF: width across flats in mm
①: also prism unit of OLC-D1
Screwed sight glass
Size AF
1 1/8-18 UNEF 36 50 Nm ②
②: also prism unit of OLC-D1-S
Screwing cap of the opto-electronic unit of OLC
maximum 10Nm
10.4 Electrical contacts
DANGER
Danger of electrical shock!
Disconnect supply voltage of compressor.
Size Nut Screw
M4 2 Nm
M5 5 Nm
M6 6 Nm 14 Nm
M8 10 Nm 25 Nm
M10 30 Nm ① 40 Nm ②
M12 40 Nm ②
M16 40 Nm ②
①: with reciprocating compressors 20 .. 30Nm
②: Mount with a pair of wedge lock washers.
▶ Tighten all screwed connections on terminal plate
manually with calibrated torque spanner to indicated
torque.
▶ Do not use any pneumatically driven tool.