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Summary of Contents for UNIRAC SFM
- Page 1 INSTALLATION GUIDE FRAME MICRORAIL™ UNIRAC Code-Compliant Installation Manual © 2022 by Unirac, Inc. All rights reserved. PUB2025MAR27 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
FLASHLOC MOUNTING ......... . 9 SFM DTD BUTYL ATTACHMENT MOUNTING ....10-12 1ST ROW INSTALLATION . -
Page 3: Tools & Specifications
String line equipment should be observed. require additional components) TOOLS FOR MODULE INSTALL: TORQUE SPECIFICATIONS: • Drill and socket adapter or socket wrench All SFM Hardware 20 ft-lbs • 1/4" hex driver (unless otherwise noted) • Torque wrench Grounding lugs See page 22 •... -
Page 4: System Components
SYSTEM COMPONENTS FRAME PAGE INSTALLATION GUIDE MICRORAIL™ SUNFRAME Microrail™ - 2" SUNFRAME Microrail™ 6.5" Splice SUNFRAME Microrail™... - Page 5 SYSTEM COMPONENTS FRAME PAGE INSTALLATION GUIDE MICRORAIL™ Trimrail (Part Number - 256072U) Module Clips (Part Number - 250111U) Sub-Components: Trim Rail Module Clip T-Bolt Tri-Drive Nut (Part Number - 009040S) Trimrail Functions: Trimrail...
- Page 6 Fits module sizes 30-40mm MLPE Mounting Assembly SFM Slider Flashkit (Part Number - 004270D) (Part Number - 008114M) Trim -to- Module Bonding Clamp and Sub-Components: Sub-Components: Floating Trim Clamp (Part Number - 008100U) Slider w/grommet 1.
- Page 7 • Slider provides north/south adjustment along Functions: Technology the slope of the roof • Connect with TrimRail™ & SFM Splice • Attach Trimrail™ to roof attachment • Compatible with 2" Microrail, 8" Attached Splices, and Flashloc Trim attachment. NOTE: Extra screws (P/N: 003251W) & Extra butyl pads (P/N: XTRABUTL-SFM) for direct-to-deck applications are sold separately.
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Page 8: System Layout
6. Mark attachment points on rafters along each NS module grid line TO STAGGER ATTACHMENTS: Shift each subsequent row of attachments one rafter over. 7. Refer to Unirac SFM D&E Guide and U-Builder for allowable spans and cantilevers. ... -
Page 9: Thermal Expansion Limits
• 100ft. with a minimum module gap of 1/8" MAX ROWS LANDSCAPE = 12 PORTRAIT =7 1" N/S GAP SET INSTALLED E/W BY SFM SYSTEM MODULE GAP GEOMETRY 0.0" TO 1" MAXIMUM EAST / WEST ARRAY & TRIMRAIL LENGTH NO GAP BETWEEN MODULES: 33 FEET... -
Page 10: Flashkit Mounting
FLASHKIT MOUNTING FRAME PAGE INSTALLATION GUIDE MICRORAIL™ INSTALL SLIDERS AND ROOF ATTACHMENTS: Follow manufacturer instructions UP-SLOPE for flashing installation procedures PILOT HOLES: FLASHINGS: Drill pilot holes for lag screws or Place flashings Mod NS + 1" structural screws (as necessary) at marked attachment points NOTE: If N-S module edge is within 1”... -
Page 11: Flashloc Mounting
SCALE 1.5 : 1 Clean roof surface of dirt, debris, Place FLASHLOC over backfilled pilot hole and Insert tip of UNIRAC approved install trim attachment snow and ice. Locate rafters and drive structural screw until mount is held firmly sealant into port. -
Page 12: Sfm Dtd Butyl Attachment Mounting
5°F or above 180°F. • SFM DTD Butyl must be installed on a clean, dry surface to ensure flashing CAUTION integrity. Do not peel the release paper from the butyl on the attachment until it is ready to install. - Page 13 • Allowable attachment spans may change for direct-to-deck applications. • It is recommended to begin installation with the screws on the upslope • Unirac recommended spans are only valid with Unirac supplied screws. side of the attachment and continue installing the screws on the downslope side of the attachment for best fit.
- Page 14 • 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. CAUTION It is recommended to begin installation with the screws on the upslope side of the attachment and continue...
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Page 15: 1St Row Installation
1ST ROW INSTALLATION FRAME PAGE INSTALLATION GUIDE MICRORAIL™ ALIGN FRONT ROW: TIGHTEN SLIDER: TRIMRAIL PREPARATION: Align front row Trimrail roof attachments with Tighten front row lag screw and TrimrailT Determine overall length of Trimrail for front row. string line roof attachment channel clamp socket Determine splice locations (if any) and Trimrail head cap screw. -
Page 16: Trimrail & Microrail Installation
Trimrail roof attachments. minimum of two clips are required per module. After rail is level, tighten channel clamp Refer to SFM D&E guide and U-builder for bolts to secure Trimrail roof attachments required position and quantity of module clips. -
Page 17: Module Mounting
MODULE MOUNTING FRAME PAGE INSTALLATION GUIDE MICRORAIL™ LAY IN MODULE(S): LAY IN MODULE(S): SEAT MODULE(S): Install first two (2) modules on bottom row. Module should slide into catch features Ensure that modules are properly seated Install downhill end of module into the Trimrail of the Trimrail and module clips. - Page 18 Attach splice at intersection of two (2) modules. Finish installing modules along row and tighten Tighten fasteners to 20 ft lbs. • Use attached splice if required per SFM D&E fastening bolts on microrails and splices to 20 ft. Guide. lbs after entire row is installed.
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Page 19: Floating Trim Installation
FLOATING TRIM INSTALLATION FRAME PAGE INSTALLATION GUIDE MICRORAIL™ REQUIREMENTS FOR TRIMRAIL ROOF ATTACHMENTS & FLOATING TRIM CLAMP: 1. Trimrail Flashkit Roof Attachments shall be Trimrail Roof Attachment or Trimrail Roof Attachment or used at rafters nearest to and under outside Floating Trim Clamp Acceptable Floating Trim Clamp Acceptable edges of array (unless noted per item 3). -
Page 20: Microinverter & Wire Mgmt
MICROINVERTER & WIRE MGMT. FRAME PAGE INSTALLATION GUIDE MICRORAIL™ PRE-INSTALL MLPE: MLPE MOUNTING LOCATION & WIRE MANAGEMENT: Install MLPE in a location on the module that will Install the MLPE Mount on the short side of the module when not interfere with microrails or grounding lugs. mounting in landscape orientation. - Page 21 MICROINVERTER & WIRE MGMT. FRAME PAGE INSTALLATION GUIDE MICRORAIL™ MICROINVERTER: WIRE MANAGEMENT: Before installing a row of modules place Verify wire management is complete after each row microinverter trunk cable. is installed. EXAMPLES: MICROINVERTER TRUNK CABLE: TIPS & TRICKS: The trunk cable can be managed securely by using Twisting the PV module wires and/or tying a loose stainless steel wire management clips attached to knot can also help manage these wires.
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Page 22: Finishing Touches
FINISHING TOUCHES FRAME PAGE INSTALLATION GUIDE MICRORAIL™ POST INSTALL HEIGHT ADJUSTMENT: INSTALL END CAPS: Height adjustment of each attached Microrail Install end caps at ends of exposed trimrail sections. assembly can be performed by rotating the height Align end cap with trimrail and apply pressure until adjustment feature with a ¼”... - Page 23 FINISHING TOUCHES FRAME PAGE INSTALLATION GUIDE MICRORAIL™ N/S Bonding N/S Bonding Clamp: Insert clamp between modules. TRIMRAIL Bonding Torque to 20 ft. - lbs. TRIMRAIL Bonding: Trimrail Bonding Alternate Method: N/S Bonding Alternate Method: Insert clamp and T-bolt into trimrail slot. Attach a bonding clip from the Trimrail Fully seat bonding clip on each module Tighten tri-drive nut until bonding pin...
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Page 24: System Bonding & Grounding
SYSTEM BONDING & GROUNDING FRAME PAGE INSTALLATION GUIDE MICRORAIL™ E-W BONDING PATH: E-W module to module bonding is accomplished with 2 pre-installed bonding pins which engage on the secure side of the MicrorailTM and splice. WEEBLUG Star Washer is Single Use Only Single Use Only Alternate method N-S BONDING PATH:... -
Page 25: Module Maintenance
MODULE MAINTENANCE FRAME PAGE INSTALLATION GUIDE MICRORAIL™ REMOVE 2" CAPS: REMOVE 8" CAPS: 1. Remove capbolt 1. Remove (2) cap bolts. 2. Separate cap from base by moving east/west 2. - Page 26 MODULE MAINTENANCE FRAME PAGE INSTALLATION GUIDE MICRORAIL™ Bonding note: If both sides of array are bonded with NS Bonding Clips, as recommended, then no additional bonding is required for module maintenance. If necessary, on the row of modules containing the module being removed, ...
- Page 27 MODULE MAINTENANCE FRAME PAGE INSTALLATION GUIDE MICRORAIL™ ELECTRICAL CONSIDERATIONS GROUNDING NOTES SUNFRAME Microrail is intended to be used with PV modules that have a The installation must be conducted in accordance with the National Electric Code system voltage less than or equal to that allowable by the NEC. A minimum (NEC) and the authority having jurisdiction.
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Page 28: Ul Code Compliance Notes
The system fire class rating requires installation in the manner specified in the SUNFRAME MICRORAIL (SFM) Installation Guide. SFM has been classified to the system level fire portion of UL 1703. This UL 1703 classification has been incorporated into the UL 2703 product certification. SFM has achieved Class A, B & C system level performance for low slope &... - Page 29 PAGE SYSTEM CERTIFICATION MICRORAIL™ LABEL MARKINGS • System fire class rating: See installation instructions for installation requirements to achieve a specified system fire class rating with Unirac. • Unirac SUNFRAME MICRORAIL is listed to UL 2703. • All splices within a system are shipped with marking indicating date and location of manufacture.
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Page 30: Compatible Modules
• Please see the SFM UL2703 Construction Data Report at unirac.com to ensure the exact solar module selected is approved for use with SFM • SFM Infinity is not compatible with module frame height of less than 30mm and more than 40mm. See Module Mounting section, page 15 for further information... - Page 31 • Please see the SFM UL2703 Construction Data Report at unirac.com to ensure the exact solar module selected is approved for use with SFM • SFM Infinity is not compatible with module frame height of less than 30mm and more than 40mm. See Module Mounting section, page 15 for further information...
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