SMA Solar Technology AG
9. Tighten all connecting screws of the power modules with the following torques (TX20). When
doing so, use the new screws supplied and follow the sequence shown.
Spare parts set
NR-STP-AST10-12
NR3-STP-AST10-12
NR-STPVIN-1012-AST
NR3-STPVIN-1012AST
NR-STP-AST
NR3-STPVIN-1012AST
NR-STPVINCO-AST
NR3-STPVINCO-AST
8
7
5
6
10. Tighten all the assembly connecting screws of the AST assembly (TX20, torque: 3.5 Nm
(31.0 in-lb)). When doing so, follow the sequence shown.
Replacement Manual
Torque of the fastening screws of the modules
3.5 Nm
Initial tightening = 1 Nm
Final tightening after 5 minutes = 2.1 Nm
3.5 Nm
Initial tightening = 1 Nm
Final tightening after 5 minutes = 2.1 Nm
4
3
1
2
8 Installing the AST Assembly
10
9
AST-STPTL10-RM-xx-10
21