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- Page 1 INSTALLATION GUIDE ASCENDER FLUSH MOUNT UNIRAC Code-Compliant Installation Manual © 2023 by Unirac, Inc. All rights reserved. PUB2024SEP05 UNIRAC welcomes input concerning the accuracy and user-friendliness of this publication. Please write to publications@unirac.com.
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Page 2: Table Of Contents
INSTALLATION GUIDE ASCENDER FLUSH MOUNT TABLE OF CONTENTS SYSTEM COMPONENTS ............THERMAL BREAK . -
Page 3: System Components
SYSTEM COMPONENTS ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE ASCENDER RAIL (A1R181M) Aluminum extrusion, available in mill finish. Supports PV modules. Use at least two per row of modules. RAIL SPLICE (A1SP02M) Structural splice joins, aligns, and electrically bonds rail sections into single length of rail. Forms a rigid splice joint, 10 inches long, pre-assembled with bonding hardware. - Page 4 SYSTEM COMPONENTS ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE MODULE MIDCLAMP (302045M) Pre-assembled clamp provides module to module and module to rail bond. Aluminum clamp with stainless steel bonding pins and T-bolt. Available in clear or dark finish. MICROINVERTER MOUNTING BOLT (008013S) Pre-assembled bolt, nut, and captive star washer attaches and bonds microinverter to rail.
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Page 5: Thermal Break
These values apply only to the L-foot. For Flashloc Comp Mount, or if your span is less than 48”, refer to the SM Ascender Flush Mount Design & Engineering Guide for max lengths of continuous rail before a thermal break is required. -
Page 6: System Layout
ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE PLANNING YOUR SM ASCENDER FLUSH MOUNT INSTALLATIONS LAYING OUT L-FEET FOR TOP CLAMPS Leave enough room to safely move around the array during installation. Refer to U-Builder tool for EW span details and follow module manufacturer Some building codes and fire codes require minimum clearances around such installation guide for rail spacing (NS spacing). -
Page 7: Roof Attachment & L-Feet Installation
ROOF ATTACHMENT & L-FEET ASCENDER FLUSH MOUNT DETAIL K INSTALLATION GUIDE PAGE SCALE 1 : 1 EW SPACING EW SPACING DETAIL E (SPAN) (SPAN) SCALE 1 / 25 STEP 2: DRILL HOLES AND INSTALL CONCRETE ANCHORS STEP 1: ARRAY LAYOUT Refer to U-Builder tool for EW span details and follow module manufacturer Follow anchor/epoxy manufacturer guidelines for hole depth and diameter. -
Page 8: Flashloc Comp Installation
3. Installers must ensure waterproofing for every roof penetration made while installing this racking system. STEP 4: INJECT SEALANT STEP 5: FINAL CHECK Insert tip of UNIRAC provided sealant into Ensure all FlashLoc attachments are port. Inject until sealant exits both vents. oriented in the same direction. Follow... -
Page 9: Splice Installation
SCALE 1.5: 1 SPLICE ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE SPLICE INSTALLATION (IF REQUIRED PER SYSTEM DESIGN) If your installation uses splice bars, attach the rails together before mounting to the L-feet/footings. A rail must be supported by more than one footing on both sides of the splice. -
Page 10: Attach Rail To L-Feet
ATTACH RAIL TO L-FEET ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE 3/8” T-bolt PLACE T-BOLT INTO RAIL: Insert 3/8” SECURE T-BOLT: Apply Anti-Seize to ALIGN POSITION INDICATOR: T-bolt into rail at L-foot locations. bolt. Rotate T-bolt into position. Hand tighten nut until rail alignment is complete. -
Page 11: Microinverter Mounting
MICROINVERTER MOUNTING ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE INSTALL MICROINVERTER MOUNT T-BOLT: INSTALL MICROINVERTER: Apply Anti-Seize and install pre-assembled 1/4” diameter bonding T-Bolts Install microinverter on to the rail. Engage with bolt. into top 1/4” rail slot at microinverter locations. Rotate bolts into position. INSTALL MICROINVERTER: ALIGN POSITION INDICATOR: Torque the 1/4”... -
Page 12: Endclamp, First Module Installation
ENDCLAMP, FIRST MODULE ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE PRO SERIES ENDCLAMP INSTALL MODULE END CLAMPS: The End clamp is INSTALL END CLAMPS ON RAIL: POSITION END CLAMPS: NOTE: To assist insertion of clamp into supplied as an assembly with a 1/2" hex head bolt Slide end clamp on to rail by Slide end clamp assembly on rail slot, Pressure may be applied to top... - Page 13 ENDCLAMP, FIRST MODULE ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE ENDCLAMP 1.91 cm 3/4" MIN 1. Position clamp to align T-bolt 2. Rotate clamp clockwise until 3. Place module at least 1.91 cm 4. While applying pressure to with rail slot.
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Page 14: Mid Clamp Installation
MID CLAMP ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE MIDCLAMP MID CLAMP INSTALLATION STEP 1: Position clamp to align STEP 2: Rotate clamp clockwise Mid clamp is supplied as an assembly with a T-bolt. Clamp T-bolt with rail slot. Lower clamp 63°... -
Page 15: Remaining Modules Installation
REMAINING MODULES ASCENDER FLUSH MOUNT INSTALLATION GUIDE PAGE INSTALL REMAINING MID-CLAMPS: POSITION T-BOLT ALIGNMENT MARKS: Proceed with module installation. Verify that the position indicator(s) & Engage each module with previously T-bolt shaft(s) are angled in the correct positioned Midclamp assemblies. -
Page 16: Standard System Grounding
10-14 AWG: 20 in-lbs IlSCO Lug #10-32 7/32" ILSCO LAY-IN LUG CONDUCTOR - UNIRAC P/N 008009P: Alternate Grounding Lug- Drill, deburr hole and bolt through both rail walls per table. •Torque value depends on conductor size. TORQUE VALUE 5 ft lbs. - Page 17 ASCENDER Bonding Connections & Grounding Paths FLUSH MOUNT INSTALLATION GUIDE PAGE BONDING MID CLAMP ASSEMBLY BONDING RAIL SPICE BAR Aluminum mid clamp with stainless steel bonding pins that pierce module 5/16" self drilling screw creates bond between splice bar and rails. frame anodization to bond module to module through clamp.
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Page 18: Bonding Connections & Grounding Paths
ASCENDER Bonding Connections & Grounding Paths FLUSH MOUNT INSTALLATION GUIDE PAGE HEX NUT W/ CAPTIVE LOCK WASHER BONDING T-BOLT WEEBLUG (OR ILSCO LUG) MOUNT BONDING MICROINVERTER RACK SYSTEM GROUND Hex nut with captive lock washer bonds metal WEEB washer dimples pierce rail to create bond microinverter flange to stainless steel T-bolt. - Page 19 ASCENDER Bonding Connections & Grounding Paths FLUSH MOUNT INSTALLATION GUIDE PAGE Fault Current RAIL Ground Path Module Grounding Rail Grounding BONDING UAF MID Clamp Min. 10 AWG, 105°C RAIL Copper Wire Bonding UAF End Clamp...
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Page 20: Array Maintenance
See below for interconnection information. INTERCONNECTION INFORMATION There is no size limit on how many SM Flush Mount & PV modules can be mechanically interconnected for any given configuration, provided that the installation meets the requirements of applicable building and fire codes. -
Page 21: Code Compliance Notes
This racking system may be used to ground and/or mount a PV module complying with UL1703 or UL61730 only when the specific module has been evaluated for grounding and/or mounting in compliance with the included instructions. UL2703 CERTIFICATION MARKING Unirac SM Ascender is listed to UL 2703. Certification marking is embossed on all mid clamps and Universal AF end clamps as shown. -
Page 22: Mechanical Load Test
PAGE The SM Ascender Flush Mount 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 includes electrical grounding, electrical bonding, mechanical load testing and and fire resistance testing. -
Page 23: System Level Fire Classification
There is no required minimum or maximum height limitation above the roof deck to maintain the system fire rating for SM Ascender Flush Mount. Module Fire Types, System Level Fire Ratings, & Rail Direction & Module Orientations are listed below:... -
Page 24: 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 SM ASCENDER system. Manufacture Module Model / Series... - Page 25 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 SM ASCENDER system. Manufacture Module Model / Series...
- Page 26 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 SM ASCENDER system. Manufacture Module Model / Series...
- Page 27 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 SM ASCENDER system. Manufacture Module Model / Series...
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