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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 tightenin

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

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 efficiency.

5.4 Recommended PV module Cleaned-up period

To get high output performance, PV module needs to be cleaned-up periodically as below:

Normal: Minimum one time per every month; Dust wind: Right away after the dust wind;

The period of the PV module cleaning shall be determined by the condition of the

weather & pollution. O&M operator shall keep record of weather condition everyday with

photo and data.

5.5 Condition of Cleaning

5.5.1 Use clean water or filtered water with soft type material (a sponge) to wipe the PV

module. Never use chemicals on the surface of the module.

5.5.2 Cleaning after sunset or before sunrise is recommended for safety of O&M operator

shock from heat stroke.

5.5.3 Do not use abrasive powder, abrasive cleaners, scrubber cleaners, polishers, sodium

hydroxide, benzene, nitro-thinners, acid or alkali and other chemical substances.

other