Panasonic HIT Power 240S Series General Installation Manual

Also see for HIT Power 230S Series: Installation manual

Contents

Panasonic HIT Power 240S Series General Installation Manual Manual pdf 7 page image

7(0.197’‘ diameter (5.0 mm)). Star washers must be used to makecontact through the anodization of themodule for this method. In this case, the screw threads are notproviding the electrical ground contact.Using lay-in lug with self tapping machine screw If using this method, please followinstructions in previous section regardingusing self-tapping machine screws. Use a grounding tin plated solid copperlay-in lug rated for direct burial andoutdoor use. Lug must be used ILSCOGBL-4DBT, Burndy CL501TN. The self-tapping machine screw size mustbe No.10 (0.190’‘ diameter (4.83mm)). This method requires a minimum number ofthreads-per-inch to achieve an adequateelectrical connection. For self-tappingmachine screws, the thread pitch must beat least 32 threads per inch (TPI). Asingle screw less than 32 TPI does notprovide sufficient thread contact. Note: Self-tapping machine screws are also calledthread cutting screws. As shown in figure 3.4, attach groundinglug to module frame using a stainless steelself-tapping machine screw. Insert a stainless steel star washer betweenthe module frame and the lug to penetrateframe anodization. Tighten stainless steel set screw at thetorque specified by lug manufacturer tosecure copper wire. The specified torque is following Ilsco Corp. GBL-4DBT10-14AWG-Solid -> 20 in-lbs,4-6AWG-Strand -> 35 in-lbs,8AWG-Strand -> 25 in-lbs, 10-14AWG-Strand -> 20 in-lbs Burndy L L C CL501TN 14AWG-Solid -> 35 in-lbs,14AWG-Strand -> 35 in-lbs,4AWG-Strand -> 45 in-lbs Recommended torque value in tighteningself-tapping machine screw is 2.3 N.m(20in-lb).Using a lay-in lug with bolt and nut If using this method, please followinstructions in previous section regardingusing bolts and nuts with larger groundingholes. Use a grounding tin plated solid copperlay-in lug rated for direct burial andoutdoor use. Lug must be used ILSCOGBL-4DBT, Burndy CL501TN. Attach grounding lug to module frame usinga stainless steel bolt and lock-nut asshown in figure 3.5. Tighten stainless steel set screw at thetorque specified by lug manufacturer tosecure copper wire. Recommended torque value in tighteningbolt and nut is 2.3 N.m (20in-lb).Using a Grounding Clip with self- tappingmachine screw Use Tyco Electronics 1954381-1 asgrounding clip. As shown in figure 3.6, place thegrounding clip onto the module frame. Thread the screw into the hole until thehead is flush with the base and base isflush with the frame, then tighten the screwwith 1/4 to 1/2 turn.Recommended torque value in tighteningself-tapping machine screw is between 2.3and 2.8 Nm. Insert the wire into the wire slot. Pressdown on both ends of the wire. Manually, or using channel lock pliers, pushthe slider over the base until it covers thebase. This will terminate the wire. For more information, please refer toInstruction sheet issued by Tyco Electronics.Using a Grounding Clip with bolt and nut Use Tyco Electronics 1954381-2 asgrounding clip. As shown in figure 3.7, place thegrounding clip onto the module frame. Thread the hex nut onto the end of thescrew, then using a 3/8-in. wrench,tighten the nut.Recommended torque value in tighteningbolt and nut is between 1.7 and 2.2 Nm. Insert the wire into the wire slot. Pressdown on both ends of the wire. Manually, or using channel lock pliers, pushthe slider over the base until it covers thebase. This will terminate the wire. For more information, please refer toInstruction sheet issued by Tyco Electronics.Module TerminationsA junction box as a terminal enclosure isequipped for electrical connections.VBHNxxxSA11 and VBHNxxxSA11B Modules areequipped with MCTM plugs as a terminalenclosure. Use these MCTM plugs for electricalconnections (see Figure 4.1).Junction Box and Terminals Modules are equipped with one junction boxcontaining terminals for both, positive andnegative polarity, and bypass diodes. Each terminal is dedicated to one polaritywith the polarity symbols engraved onto thebody of the junction box (see Figure 4.2). Each terminal is provided with factoryinstalled lead cables and a latchingconnector for series and string connections.Always use these connectors and do notdetach them from cables. Latching connectors are type IV and madeby Multi-Contact. Supplied connectors listedby UL. In order to comply with NEC 2008, alocking sleeve needs to be used with allconnectors that are exposed. The locking sleeve (PV-SSH4) is madeby Multi-Contact and can only be releasedwith a special tool also made byMulticontact (PV-MS). Locking sleeves arenot supplied with modules and must bepurchased separately.Conduit In applications where wire raceways orconduit are used, follow the applicablecodes for outdoor installations.. Verify that all fittings are properly installedto protect wires against damage andprevent moisture intrusion.DIODESBypass Diodes When modules in series strings are partiallyshaded, it may cause reverse voltageacross cells or modules, because thecurrent from other cells in the same seriesis forced to flow through the shaded area.This may cause undesirable heating tooccur. The use of a diode to bypass the shadedarea can minimize both heating and arraycurrent reduction. Modules are equipped with factory installedbypass diodes. The factory-installed diodesprovide proper circuit protection for thesystems within the specified system voltage,so that you do not need any otheradditional bypass diodes. Contact your Panasonic AuthorizedRepresentative for proper diode type, if it isnecessary to add or change diodes due tosystem specifications.MAINTENANCE Some maintenance is recommended tomaintain optimal output performance of thesolar modules.