Installation Manual

10
(k)
Stainless steel M5 bolt
Stainless steel M5 nut
Stainless steel spring washer
Stainless steel cut washer
Stainless steel plain washer
Copper wire
Stainless steel M5 cup washer
Stainless steel M5 bolt
4.2.1 The grounding requirements must be checked in accordance with the applicable regulations and standards before work
is started.
4.2.2 Use the marked 5.5 mm grounding holes to ground the anodized frame. Use one M5 nut, two M5 cut washers, one M5
plain washer, one M5 spring washer, and one M5 bolt and the copper wire. All nuts, bolts, and washers are type M5 and should
be made of stainless steel (Fig. (n) ).
4.2.3 Put the bolt through the cup washer and wrap the copper wire around the bolt. (Note that the copper wire cannot be
attached directly to the aluminum.)
4.2.4 Put the bolt through the cut washer and then through the hole in the aluminum frame.
4.2.5 Add the spring washer and nut on the other side of the bolt and tighten to secure all parts. The tightening torque should
be 210±20 N•cm.
4.2.6 Approve the use of UL-467 certified bonding and grounding devices, including Burndy (formerly Wiley Electronics)
Washer Electrical Equipment Bonding (WEEB) and similar devices, such as barbed washers, that meet the requirements of UL-
467 as suitable for electrical bonding and grounding PV modules to PV mounting systems.
5. Maintenance
5.1 Regularly carry out a visual inspection for dirt, dust, bird dropping, leaves, and other detritus covering the modules.
5.2 If snow is present, a soft-bristled brush with soft bristles may be used to clean the surface of the modules.
5.3 Regular electrical and mechanical inspection by a licensed professional will keep the system safe and operating at
maximum eciency.
5.4 Recommended PV module Cleaned-up period
To get high output performance, PV module needs to be cleaned-up periodically as below:
a Normal: Minimum one time per every month; Dust wind: Right away after the dust wind;
(n) Grounding the aluminum frame with copper wire