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- Page 1 INSTALLATION GUIDE UNIRAC Code-Compliant Installation Manual © 2023 by Unirac, Inc. All rights reserved. PUB2024JUL12 UNIRAC values your input regarding the accuracy and user experience of this document. Please write to publications@unirac.com.
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Page 2: Table Of Contents
INSTALLATION GUIDE TABLE OF CONTENTS NXT SYSTEM COMPONENTS ....... 1-3 SYSTEM LAYOUT . -
Page 3: Nxt System Components
Pre-assembled aluminum L-Foot with engineered roof seal. • 4” STAINLESS-STEEL LAG BOLT with sealing EPDM washer. • UNIRAC PROVIDED SEALANT (if applicable) STRONGHOLD BUTYL ATTACHMENT KIT: Use to secure rails through roofing material to building structure. Supplied with the following: •... - Page 4 NXT SYSTEM COMPONENTS INSTALLATION GUIDE PAGE FLASHKIT PRO: Use with Stronghold Rail Clamp to secure rail through roofing material to building structure. Aluminum L-foot with EPDM grommet, aluminum flashing, and stainless-steel lag bolt COMBO CLAMP: Use as a mid clamp or an end clamp to secure and electrically bond modules to rails.
- Page 5 NXT SYSTEM COMPONENTS INSTALLATION GUIDE PAGE PART DESCRIPTION PART NUMBER NXT UMOUNT RAIL - 168" MILL 168RLM1 RAIL NXT UMOUNT RAIL - 168" DARK 168RLD1 RAIL SPLICE NXT UMOUNT RAIL SPLICE RLSPLCM2 STRONGHOLD ATT KIT COMP MILL SHCPKTM1 STRONGHOLD ATTACHMENT KIT...
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Page 6: System Layout
LAYING OUT ROOF ATTACHMENTS Locate and mark the position of the roof attachment within the installation area. Refer to Unirac NXT UMOUNT D&E Guide & U-Builder for rail spans and cantilevers. Follow module manufacturer installation requirements allowable spacing based on appropriate mounting locations. Modules should be placed such that they overhang the rails symmetrically. -
Page 7: Thermal Break
NXT UMOUNT MLPE & Lug Clamp. See Page 17. The values displayed are the maximum allowed rail length, in feet, without a thermal break. If your span is less than 48”, refer to the NXT UMOUNT Design & Engineering ... - Page 8 EPDM, TPO, Polyethylene, Polypropylene, ABS, and Metal Roofs (including Note: Galvalume, painted steel, and galvanized). See Page 9 for instructions on placing extra butyl pads or contact Unirac • Pilot holes are not necessary to be drilled for self-drilling screws. If holes are team for further information.
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Page 9: Stronghold Attachment With Butyl Installation
3. If three or more screws miss the rafter, then follow the direct to deck installation CAUTION procedure and reduce the attachment spans as per Unirac direct-to-deck • To determine if the screw is engaging the rafter, there should be resistance recommended spans for roof attachment. - Page 10 Note: • Additional deck screws are NOT included in the KIT. Must be purchased separately. • Maintain stock of additional deck screws from Unirac Kits in case of direct-to-deck installation. CAUTION 1. Allowable attachment spans may change for direct-to-deck applications.
- Page 11 Note: • Extra butyl pads are NOT included in the KIT. • Pre-stock with extra butyl pads from Unirac Kits in case installation is required over overlap or gap. WARNING Installing attachment on uneven surfaces, shingle gaps or overlaps, creates a risk for water leakage and...
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Page 12: Roof Preparation For Lag Bolt Installation
ROOF PREP FOR LAG BOLT INSTALL INSTALLATION GUIDE PAGE MARK ARRAY LOCATION: DRILL PILOT HOLES: Drill a 7/32” pilot Mark array location and determine hole at each roof attachment. Clean roof roof attachment locations based surface of dirt, debris, snow, and ice. Fill on array layout. -
Page 13: Stronghold Attachment Installation
SEAL: Drop the rail clamp assembly into the open Place the Stronghold attachment base assembly Insert tip of UNIRAC provided sealant into port. Inject slot of L-Foot. over the pilot hole. Align indicator marks of until sealant exits vent. Follow sealant manufacturer's mount with chalk line. -
Page 14: Flashkit Pro Installation
FLASHKIT PRO INSTALLATION INSTALLATION GUIDE PAGE INSTALL FLASHKIT PRO FLASHING: INSTALL L-FOOT: Fasten L-foot and FIX RAIL CLAMP ONTO L-FOOT: Remove Add a U-shaped bead of roof sealant flashing into place by passing the bolt from rail clamp. Place bolt through to the underside of the flashing included lag bolt and pre-installed slot in L-foot and though hole in Rail... -
Page 15: Attachment Orientations
(E) and (F) above. Note: For high snow loads, use orientations (C) or (D). Refer to NXT UMOUNT Design and Engineering Guide for specific requirements. Note: For high snow loads, use orientation (F). Refer to NXT UMOUNT Design and Engineering Guide for specific requirements. - Page 16 FLASHKIT PRO L-FOOT AND RAIL CLAMP ORIENTATIONS: Flashkit Pro L-foot and Rail Clamp can be installed in either orientation shown in image (G) and (H) above. Note: For high snow loads, use orientation (H). Refer to NXT UMOUNT Design and Engineering Guide for specific requirements.
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Page 17: Rail Installation
RAIL INSTALLATION IMAGE-2-INSTALL STEP-2 IMAGE-1-INSTALL STEP-1 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 IMAGE-2-INSTALL STEP- IMAGE-1-INSTALL STEP-1 IMAGE-5-CAUTION-RAIL CLAMP IMAGE-5-CAUTION-RAIL CLAMP IMAGE-2-INSTALL STEP-2 IMAGE-1-INSTALL STEP-1 IMAGE-2-INSTALL STEP-2 IMAGE-1-INSTALL STEP-1 POSITION RAIL ONTO RAIL CLAMP: TIGHTEN RAIL ONTO RAIL CLAMP : IMAGE-4-RAIL FIX With the bolt in the pre-assembled (loose) position, Insert the rail flange on one side of the clamp... -
Page 18: Structural Splice
INSTALLATION GUIDE PAGE SPLICE INSTALLATION (IF REQUIRED PER SYSTEM DESIGN) If your installation uses NXT UMOUNT Rail Splice, attach the rails together either before installing the rail or after. Use marking on the splice for centering the connection. To install, slide the splice into the rail on each rail and drag it to the center of the marking. -
Page 19: System Grounding
IMAGE-6-LUG INSTALL STEP-4 IMAGE-8-ILSCO LUG WITH GROUND WIRE IMAGE-7-ILSCO LUG INSTALL ALTERNATE SYSTEM GROUNDING WITH ILSCO LAY-IN LUG - UNIRAC P/N ALTERNATE SYSTEM GROUNDING WITH ILSCO LAY-IN LUG - UNIRAC P/N IMAGE-7-ILSCO LUG INSTALL IMAGE-8-ILSCO LUG WITH GROUND WIRE 008009P: 008009P: Alternate Grounding Lug. -
Page 20: Mlpe Mounting
IMAGE-6-MLPE INSTALL-RIGHT IMAGE-10-MLPE INSTALLED ON FRAME TORQUE VALUE: 20 ft-lbs. IMAGE-6-MLPE INSTALL-RIGHT Note: Refer to Unirac MLPE Mount Installation Guide for details at IMAGE-11-BOLT TIGHTEN-BLOW UP IMAGE-7-MLPE INSTALL-WRONG CAUTION https://unirac.com Ensure that grounding plate is always installed on the top of MLPE devices. -
Page 21: Wire Management
WIRE MANAGEMENT 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 IMAGE-3-WIRE MGMT CLIP STEP-3 IMAGE-1- WIRE MGMT CLIP INSTALL STEP-1 IMAGE-6-WIRE TIE INSERT IMAGE-3-WIRE MGMT CLIP STEP-3 INSTALL NS WIRE MANAGEMENT CLIP:... -
Page 22: Combo Clamp Installation
COMBO CLAMP INSTALLATION INSTALLATION GUIDE PAGE 1/2" 1" min INSTALL COMBO (END) CLAMPS: INSERT COMBO CLAMP: INSTALL END MODULE: Position first module onto rails Install Combo Clamps starting at the aligned end of Insert Combo Clamp from one side of and engage module frame with end clamps. -
Page 23: Hidden End Clamp
HIDDEN END CLAMP INSTALLATION GUIDE PAGE INSTALL MODULE END CLAMPS: The End clamp is INSTALL END CLAMPS ON RAIL: POSITION END CLAMPS: NOTE: supplied as kit with pre assembled end cap. The Slide the end clamp assembly on Slide the end clamp assembly To assist insertion of the clamp clamp should be installed on the rails prior to to the rail by engaging grooves... -
Page 24: Finishing Touches
FINISHING TOUCHES INSTALLATION GUIDE PAGE FOR HIDDEN CLAMP Pro Tip: Pro Tip: Module For best appearance, leave For best appearance, leave Module enough space for the bolt enough space for the bolt head while cutting the rail head while cutting the rail ends to perfectly snap fit ends to perfectly snap fit the end cap. - Page 25 BONDING CONNECTIONS & GROUNDING PATHS INSTALLATION GUIDE PAGE IMAGE-5-BONDING MICROINVERTER MOUNT IMAGE-6-RACK SYSTEM GROUND IMAGE-2-BONDING COMBO MID-END CLAMP ASSEMBLY IMAGE-1-NXT RAIL BONDING RAIL SPLICE BONDING COMBO MID-END CLAMP ASSEMBLY Aluminum combo mid-end clamp cap with stainless steel bonding pins that pierce Bonding Hardware creates bond between Splice bar and each rail section.
- Page 26 BONDING CONNECTIONS & GROUNDING PATHS IMAGE-1-ISO VIEW IMAGE-2-RACK SYSTEM GROUND IMAGE-3-LUG INSTALL STEP-1 IMAGE-4-LUG INSTALL STEP-2 INSTALLATION GUIDE PAGE MICRO-INVERTER FLANGE IMAGE-7-ILSCO LUG INSTALL IMAGE-11-NS ALTERNATE BONDING METHOD ALTERNATE ROW-TO-ROW BONDING PATHS BONDING MICROINVERTER MOUNT Serrations on the bolt head remove the anodization of MLPE Row-to-row module bonding is accomplished with bonding clamp flange and bonds.
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Page 27: Bonding Connections & Grounding Paths
BONDING CONNECTIONS & GROUNDING PATHS INSTALLATION GUIDE PAGE RACKING SYSTEM GROUND Ground Lug w/ Bare BONDING Copper Wire MICROINVERTER Note: Only one lug per module MOUNTS row required BONDING RAIL SPLICE BONDING COMBO CLAMPS ALTERNATE ROW - TO - ROW BONDING METHOD... - Page 28 See below for interconnection information. MODULE REMOVED INTERCONNECTION INFORMATION There is no size limit on how many NXT UMOUNT & PV modules can be mechanically interconnected for any given configuration, provided that the installation meets the requirements of applicable building and fire codes.
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Page 29: Mechanical Load Test
UL 2703. NXT UMOUNT has achieved system level performance for steep sloped roofs and low sloped roofs. System level fire performance is inherent in the NXT UMOUNT design, and no additional mitigation measures are required. See table below for definition of steep sloped and low sloped roofs. The system is to be mounted over fire resistant roof covering rated for the application. -
Page 30: Code Compliance Notes
UL2703 CERTIFICATION MARKING: Unirac NXT UMOUNT is listed to UL 2703. Certification marking is embossed on all Combo Clamps as shown. Labels with additional certification information are provided with clamps and must be applied to the NXT UMOUNT Rail at the edge of the array. -
Page 31: Compatible Modules
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 UMOUNT system. Manufacture Module Model / Series... - Page 32 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 UMOUNT system. Manufacture Module Model / Series...
- Page 33 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 UMOUNT system. Manufacture Module Model / Series...
- Page 34 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 UMOUNT system. Manufacture Module Model / Series...
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Page 35: Appendix A: S-5! Components Installation
APPENDIX A S-5! COMPONENTS INSTALLATION GUIDE INSTALLATION GUIDE PAGE S-5! COMPONENTS S-5-B S-5-B Mini S-5-E S-5-E Mini S-5-H S-5-H mini S-5-H90 S-5-H90 Mini S-5-N S-5-N Mini S-5-Q S-5-Q Mini S-5-S S-5-S Mini S-5-T... - Page 36 APPENDIX A S-5! COMPONENTS INSTALLATION GUIDE INSTALLATION GUIDE PAGE S-5! COMPONENTS S-5-T mini S-5-U S-5-U Mini S-5-V S-5-V Mini S-5-Z S-5-Z mini Protea Bracket...
- Page 37 Follow the steps mentioned on Page 12 Page 12 to to secure Rail to L-Foot or Protea secure Rail to L-Foot or Protea Finish NXT UMOUNT installation by following instructions provided in this Finish NXT UMOUNT installation by following instructions provided in this Bracket...
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Page 38: Appendix B: Metal Roof Rail Clamp Installation
• Ensure the bolt is positioned in between the rail clamp bolt and the roof attachment set screw. STEP 3: FINISH SYSTEM INSTALLATION Finish NXT UMOUNT installation by following instructions provided in this Finish NXT UMOUNT installation by following instructions provided in this manual from manual from Page 15 Page 15 to to Page 22.
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