INSTALLATION GUIDE TABLE OF CONTENTS A B C D E F G H I J K L M N - NH SYSTEM COMPONENTS SYSTEM LAYOUT THERMAL BREAK ROOF PREPARATION STRONG HOLD ATTACHMENT INSTALL FLASHKIT PRO INSTALL ATTACHMENT ORIENTATIONS RAIL INSTALL STRUCTURAL SPLICE SYSTEM GEOUNDING MLPE MOUNTING WIRE MANAGEMENT COMBO CLIP INSTALL FINISHING TOUCHES APPENDIX - 1: BONDING CONNECTION GROUND PATHS APPENDIX - 2: BONDING CONNECTION GROUND PATHS APPENDIX - 3: SYSTEM CERTIFICATION APPENDIX - 4: SYSTEM CERTIFICATION APPENDIX - 5: SYSTEM CER
NXT SYSTEM COMPONENTS A 8 7 6 5 4 3 2 INSTALLATION GUIDE PAGE 1 RAIL: Supports PV modules with built-in wire management. Use at least two rails per row of modules. Aluminum extrusion, available in mill, or dark anodized. D D RAIL SPLICE: Internal Structural Splice joins, aligns, and electrically bonds rail sections into single length of rail. 10 inches long aluminum splice, preassembled with stainless-steel hardware.
SYSTEM LAYOUT B INSTALLATION GUIDE PAGE PLANNING YOUR NXT HORIZON INSTALLATIONS The installation can be laid out with rails parallel to the rafters or perpendicular to the rafters. Note that NXT HORIZON rails make excellent straight edges for doing layouts. Center the installation area over the structural members as much as possible. Leave enough room to safely move around the array during installation.
THERMAL BREAK C INSTALLATION GUIDE PAGE EXPANSION JOINT USED AS THERMAL BREAK Expansion joints prevent buckling of rails or system connection failure due to thermal expansion. Determine location of expansion joints prior to installation of roof attachments and rails. To create a thermal expansion joint, provide a sufficient gap between rails for proper installation of end clamps and tooling to achieve required torque.
ROOF PREPARATION D INSTALLATION GUIDE PAGE MARK ARRAY LOCATION: Mark array location and determine roof attachment locations based on array layout. Snap chalk lines to mark each row of roof attachment points. On shingle roofs, snap lines 1-3/4” below upslope edge of shingle course. Locate rafters and mark at intersection of attachment lines. Attachment spacing determined per Design and Engineering Guide or project specific Ubuilder Engineering Report .
STRONGHOLD ATTACHMENT INSTALL E INSTALLATION GUIDE PAGE INSTALL STRONGHOLD ATTACHMENT BASE: Place the Stronghold attachment base assembly over the pilot hole. Align indicator marks of mount with chalk line. Drive lag bolt until mount is held firmly in place. The EPDM washer should compress and expand slightly beyond the outside edge of the steel washer when the proper torque is applied. Note: Rail clamp can be installed in FOUR orientations. Refer to PG. G for detailed view.
FLASHKIT PRO INSTALLATION F INSTALLATION GUIDE PAGE INSTALL FLASHKIT PRO FLASHING: Add a U-shaped bead of roof sealant to the underside of the flashing with the open side of the U pointing down the roof slope. Slide the aluminum flashing underneath the row of shingles directly up slope from the pilot hole as shown. Align the indicator marks on the lower end of the flashing with the chalk lines on the roof to center the raised hole in the flashing over the pilot hole in the roof.
ATTACHMENT ORIENTATIONS G IMAGE-1-DOWNSLOPE-BACK IMAGE-2-DOWNSLOPE-FRONT IMAGE-1-DOWNSLOPE-BACK 7 6 5 4 INSTALLATION GUIDE PAGE IMAGE-2-DOWNSLOPE-FRONT 3 2 8 A IMAGE-3-UPSLOPE-BACK 8 1 7 6 5 B D 4 3 7 2 6 D D E D E P LO PE SLO WN DO S WN DO C 5 4 3 2 1 E P LO S WN DO C C C B B B B IMAGE-1-DOWNSLOPE-BACK 1-DOWNSLOPE-BACK IMAGE-2-DOWNSLOPE-FRONT IMAGE-2-DOWNSLOPE-FRONT IMAGE-1-DOWNSLOPE-BACK IMAGE-2-DOWNSLOPE-FRONT IMAGE-3-UPSLOPE-BACK 8 7 6 5 4 3 2
D 8 7 6 5 4 3 2 RAIL INSTALLATION H 1 IMAGE-2-INSTALL STEP-2 IMAGE-1-INSTALL STEP-1 D D INSTALLATION GUIDE PAGE IMAGE-1-INSTALL STEP-1 IMAGE-2-INSTALL STEP-2 IMAGE-3-ISO VIEW IMAGE-3-ISO VIEW IMAGE-4-RAIL FIX 8 8 7 6 5 4 3 8 2 7 1 6 5 4 3 2 7 6 5 4 3 2 1 1 D D D D D D C C C C C C C C B B C B B B B IMAGE-2-INSTALL STEPIMAGE-1-INSTALL STEP-1 A B A A A 8 8 7 6 5 4 3 2 B IMAGE-5-CAUTION-RAIL CLAMP IMAGE-5-CAUTION-RAIL CLAM
STRUCTURAL SPLICE I INSTALLATION GUIDE PAGE 8 SPLICE INSTALLATION (IF REQUIRED PER SYSTEM DESIGN) 6 5 4 3 2 D 4 3 2 1 C ga p 6” B /1 CAUTION: IF ASSEMBLING SPLICE DIRECTLY ON ROOF, TAKE CARE TO PREVENT BOLTS FROM PENETRATING ROOF COVERING. D be tw ee n TORQUE VALUE: 15 ft-lbs. Do not use Anti-Seize. 0t o3 D 7 5 rai 8 6 ls If your installation uses NXT HORIZON Rail Splice, attach the rails together either before installing the rail or after.
IMAGE-3-LUG INSTALL STEP-1 IMAGE-4-LUG INSTALL STEP-2 SYSTEM GROUNDING J IMAGE-5-LUG INSTALL STEP-3 IMAGE-3-LUG INSTALL STEP-1 IMAGE-4-LUG INSTALL STEP-2 INSTALLATION GUIDE PAGE IMAGE-1-ISO VIEW IMAGE-1-ISO VIEW IMAGE-2-RACK SYSTEM GROUND IMAGE-2-RACK SYSTEM GROUND IMAGE-1-ISO VIEW IMAGE-5-LUG INSTALL STEP-3 IMAGE-4-LUG INSTALL STEP-2 IMAGE-2-RACK SYSTEM GROUND IMAGE-3-LUG INSTALL STEP-1 IMAGE-3-LUG INSTALL STEP-1 IMAGE-4-LUG INSTALL STEP-2 IMAGE-1-ISO VIEW IMAGE-2-RACK SYSTEM GROUND 8 7 6
MLPE MOUNTING IMAGE-4-LUG INSTALL STEP-2 IMAGE-2-RACK SYSTEM GROUND IMAGE-3-LUG INSTALL STEP-1 IMAGE-5-LUG INSTALL STEP-3 IMAGE-5-LUG INSTALL STEP-3 IMAGE-3-LUG INSTALL STEP-1 IMAGE-4-LUG INSTALL STEP-2 IMAGE-1-MLPE INSTALL STEP-1 K INSTALLATION GUIDE PAGE IMAGE-2-RACK SYSTEM GROUND IMAGE-6-LUG INSTALL STEP-4 IMAGE-6-LUG INSTALL STEP-4 IMAGE-2-MLPE INSTALL STEP-2 IMAGE-3-MLPE INSTALL STEP-3 IMAGE-1-MLPE INSTALL STEP-1 8 7 6 5 4 8 7 3 6 2 1 5 D D 4 D 8 7 3 2 6 1
WIRE MANAGEMENT L INSTALLATION GUIDE PAGE IMAGE-2-WIRE MGMT CLIP INSTALL STEP-2 IMAGE-3-WIRE MGMT CLIP STEP-3 IMAGE-1- WIRE MGMT CLIP INSTALL STEP-1 IMAGE-2-WIRE MGMT CLIP INSTALL STEP-2 IMAGE-1- WIRE MGMT CLIP INSTALL STEP-1 8 7 6 5 4 3 2 IMAGE-3-WIRE MGMT CLIP STEP-3 1 8 D 8 7 D 6 5 4 3 2 7 6 5 4 3 2 1 1 D D D C C B B D C C C C B B B B A A IMAGE-1- WIRE MGMT CLIP INSTALL STEP-1 A A 7 6 5 4 3 2 INSTALL NS WIRE MANAGEMENT CLIP: Ensure that t
COMBO CLAMP INSTALLATION M IMAGE-3-COMBO CLAMP INSTALL STEP-2 IMAGE-2-COMBO CLAMP INSTALL STEP-1 INSTALLATION GUIDE PAGE IMAGE-6-ISO VIEW IMAGE-3-COMBO CLAMP INSTALL STEP-2 8 7 6 IMAGE-1-INSTALL COMBO (END) CLAMPS 5 IMAGE-1-INSTALL COMBO (END) CLAMPS 4 3 2 1 IMAGE-2-COMBO CLAMP INSTALL STEP-1 IMAGE-1-INSTALL COMBO (END) CLAMPS D 8 7 D 6 D 8 5 7 4 6 3 5 2 1 D 3 IMAGE-2-COMBO CLAMP INSTALL STEP-1 IMAGE-3-COMBO CLAMP INSTALL STEP-2 1 IMAGE-2-COMBO CLAMP INSTALL STEP-1 2
FINISHING TOUCHES N INSTALLATION GUIDE PAGE IMAGE-1-RAIL END CAP IMAGE-2-END CAP AND COMBO CAP IMAGE-1-RAIL END CAP IMAGE-2-COMBO CLAMP CAP 7 6 5 4 3 8 2 7 6 1 5 4 8 3 2 7 6 1 5 4 3 2 1 IMAGE-2A-END CAP AND COMBO CAP D D D D D C C C C C B B B B B A 8 7 6 7 OPTIONAL END CAP: End caps install as supplied in NH. Place the cap on the edge of the rail and press fit the cap onto the rail.
APPENDIX 1 BONDING CONNECTION GROUND PATHS 8 IMAGE-5-BONDING MICROINVERTER MOUNT 7 6 5 4 IMAGE-6-ISO VIEW PAGE 3 2 IMAGE-6-RACK SYSTEM GROUND IMAGE-2-BONDING COMBO MID-END CLAMP ASSEMBLY OMBO (END) CLAMPS IMAGE-2-COMBO CLAMP INSTALL STEP-1 IMAGE-2-COMBO CLAMP INSTALL STEP-1 D IMAGE-3-COMBO CLAMP INSTALL STEP-2 8 8 MO FR DU AM LE E 7 6 5 4 8 3 7 6 2 1 2 5 D 4 6 5 3 4 3 2 4 3 2 1 MODULE FRAME D D C NXT RAIL C C B 2 C A A IMAGE-1-NXT RAIL 8 7 6 5 4 3
APPENDIX 2 7 RACKIN G SYSTEM GROUN D Note: Only one lug per module row required 6 5 BONDING CONNECTION GROUND PATHS 4 Ground Lug w/ Bare Copper Wire ALTERN ATE ROW-TO- ROW BONDIN G METHO D 2 BONDING MICROINVERTER MOUNTS BONDIN G RAIL SPLICE BONDIN G COMBO CLAMP S 3 PAGE 1
APPENDIX 3 SYSTEM CERTIFICATION PAGE The NXT Horizon system has been certified and listed to the UL 2703 standard (Rack Mounting Systems and Clamping Devices for Flat-Plate Photovoltaic Modules and Panels). This standard included electrical grounding, electrical bonding, mechanical load and fire resistance testing. SYSTEM LEVEL FIRE CLASSIFICATION The system fire class rating requires installation in the manner specified in the NXT HORIZON Installation Guide.
APPENDIX 4 SYSTEM CERTIFICATION PAGE Electrical Bonding and Grounding Test Modules The list below is not exhaustive of compliant modules but shows those that have been evaluated and found to be electrically compatible with the NXT Horizon system. Manufacture Module Model / Series Aionrise AION60G1, AION72G1 Aleo Aptos Solar Astronergy Auxin Manufacture Module Model / Series Manufacture Module Model / Series Japan Solar JPS-60 & JPS-72 Series P-Series & S-Series Canadian Solar (cont.
APPENDIX 5 SYSTEM CERTIFICATION PAGE Electrical Bonding and Grounding Test Modules The list below is not exhaustive of compliant modules but shows those that have been evaluated and found to be electrically compatible with the NXT Horizon system.
APPENDIX 6 SYSTEM CERTIFICATION PAGE Electrical Bonding and Grounding Test Modules The list below is not exhaustive of compliant modules but shows those that have been evaluated and found to be electrically compatible with the NXT Horizon system. Manufacture Module Model / Series Trina PA05, PD05, DD05, DD06, DE06, DE09.05 PD14, PE14, DD14, DE14, DE15, DE15V(II) DEG15HC.20(II), DEG15MC.20(II) DEG15VC.20(II), DE18M(II), DEG18MC.20(II) DE19, DEG19C.
