10
Fig. 7 Diagram of the bolt installation process
①
Place the PV module on top of the rack.
②
Insert 4 stainless steel bolts in corresponding
mounting holes. The 9x14mm mounting holes
match with M8 bolts, while the 7x10mm mounting
holes match with M6 bolts. 7x10mm mounting holes
are positioned with a hole pitch of 400mm.
③
Make sure to use two stainless steel washers for each
bolt, one on each side of the rack. Then screw on the
top of a stainless-steel spring washer or toothed lock
washer. Finally, lock with a stainless-steel nut.
④
The tightening torque is recommended to be
9~12Nm for M6 bolts and 17~23Nm for M8 bolts.
Due to the possible difference of bolt material, the
specific torque value is subject to the information
confirmed by the bolt supplier.
5.3.2
Clamped mounting
Photovoltaic modules can be installed across the
support frame (Fig. 8) or parallel to the frame of the
photovoltaic module (Fig. 9). When using clamps to
install, each module must be secured with a minimum
of 4 clamps.
Fig. 8 Rails overlapping the long-side frame
Fig. 9 Rails overlapping the short-side frame
！
ATTENTION
：
The length of the rack must be longer than the PV
module, otherwise it should be confirmed by
Solahart in advance.
The above two diagrams show the mounting method
using aluminum clamps. "D" indicates the mounting
range. Table 1 shows the recommended mounting
position and corresponding machine loads.
Each aluminum clamp is equipped with an M8 bolt,
a flat washer, a spring washer and an M8 nut. The
mounting steps are as follows:
：
①
Place the module on the two supporting rails which
should be made with stainless material and treated
with an anti-corrosion process (e.g. hot dipped
galvanizing). Each PV module needs at least four
clamps to be fixed. The module clamps should not
come into contact with
