UNIRAC ULA User manual

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE
UNIRAC welcomes input concerning the accuracy and user-friendliness of this publication. Please write to [email protected].
UNIRAC Code-Compliant Installation Manual
© 2021 by Unirac, Inc. All rights reserved.
PUB2022NOV17

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE
Installer responsibility
The installer is solely responsible for:
• Complying with all local or national building codes, including any that may supersede this
manual.
• Ensuring that UNIRAC and other products are appropriate for the particular installations and
installation environment.
• Ensuring safe installation of all electrical aspects of the PV array.
SYSTEM COMPONENTS ............................................ 1-3
SYSTEM LAYOUT ................................................... 4-5
SYSTEM ASSEMBLY ................................................. 6-7
MICROINVERTER MOUNTING ....................................... 8
STANDARD SYSTEM GROUNDING .................................. 9
INSTALLATION OF STANDARD SERIES CLAMPS .................... 10-12
BONDING CONNECTIONS & GROUNDING PATHS ................... 13-15
CODE COMPLIANCE NOTES ........................................ 16
APPENDIX A: SYSTEM CERTIFICATION .............................. 17-20
APPENDIX B: INSTALLATION OF PRO SERIES
& UNIVERSAL A/F CLAMPS ......................................... 21-24
TABLE OF CONTENTS PG TABLE OF CONTENTS PG

ULAPLANNING AND
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INSTALLATION MANUAL INSTALLATION GUIDE PAGE
1
IMAGE-1-LANDSCAPE ASSY
IMAGE-2-FRONT CAP
IMAGE-3-REAR CAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONAL CROSS BRACE IMAGE-6-RAIL BRACKET
IMAGE-7-SM OR GFT RAIL
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A A
B B
C C
D D
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Note: Incidental materials such as temporary bracing or gravel may be necessary.
Note:
East-West Cross Braces must be
installed in pairs with a rear and
a front brace connected to the
same vertical pipe bay.
• Brace pairs can be installed
on any leg pair in the array.
• Bonding Clamps are Single
use only.
Rear cap: Attaches back horizontal pipe and upper
end of East-West braces to vertical pipes . Included
hardware: (2) U-bolts, (4) ange nuts, set screws.
Optional Cross Brace: Provides North-South and
East-West diagonal bracing. *See design guide or
U-Builder
Front cap: Attaches front horizontal pipe and upper
end of North-South braces to vertical pipe. Included
hardware: (2) U-bolts, cross-brace bolt, (5) ange nuts,
set screws.
Slider: Attaches lower end of North-South cross brace
and both ends of East-West braces to vertical pipes.
Included Hardware: (1) cross-brace bolt, (1) ange nut,
set screws.
Rail Bracket: Attaches rail to horizontal pipes.
Included hardware: (1) U-bolt, (1) 1/2 inch bolt, and
(2) ange nuts.
SOLARMOUNT OR GFT Rails:
SM Standard or GFT rails support PV modules.
Components and quantities specic to your installations are listed on your quotation.
ULA COMPONENTS
IMAGE-1-LANDSCAPE ASSY
IMAGE-2-FRONT CAP
IMAGE-3-REAR CAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONAL CROSS BRACE IMAGE-6-RAIL BRACKET
IMAGE-7-SM OR GFT RAIL
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B B
C C
D D
IMAGE-1-LANDSCAPEASSY IMAGE-2-FRONT CAP
IMAGE-3-REAR CAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONALCROSS BRACE IMAGE-6-RAIL BRACKET
IMAGE-7-SM OR GFT RAIL
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B B
C C
D D
IMAGE-1-LANDSCAPE ASSY IMAGE-2-FRONT CAP
IMAGE-3-REAR CAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONAL CROSSBRACE IMAGE-6-RAIL BRACKET
IMAGE-7-SM OR GFT RAIL
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B B
C C
D D
IMAGE-1-LANDSCAPEASSY IMAGE-2-FRONTCAP
IMAGE-3-REARCAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONALCROSS BRACE
IMAGE-6-RAILBRACKET
IMAGE-7-SMOR GFT RAIL
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B B
C C
D D
IMAGE-1-LANDSCAPEASSY IMAGE-2-FRONT CAP
IMAGE-3-REAR CAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONAL CROSSBRACE
IMAGE-6-RAIL BRACKET
IMAGE-7-SM OR GFT RAIL
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B B
C C
D D
IMAGE-1-LANDSCAPE ASSY IMAGE-2-FRONT CAP
IMAGE-3-REAR CAP
IMAGE-4-SLIDER
IMAGE-5-OPTIONAL CROSS BRACE
IMAGE-6-RAIL BRACKET
IMAGE-7-SM OR GFT RAIL
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B B
C C
D D
S.NO. PART PART NUMBER
1Front cap 403211C
2Rear cap 403214C
3 Slider 403215C
4Optional Cross Brace 403200C
5Rail Bracket 403216M
6
SM Rail CLR 310xxxC
SM Rail DRK 310xxxD
SM Rail MILL 320xxxM
GFT Rail 411166M
SYSTEM COMPONENTS

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
2
IMAGE-1-PORTAIT ASSY
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B B
C C
D D
Portrait arrays utilize the same components as landscape arrays.
ULA PORTRAIT ARRAY
MATERIAL SPECIFICATIONS
Rails, caps, sliders, rail brackets, cross braces, bottom mounting clips, and top mounting clamps: 6105-T5 aluminum extrusion; caps are welded.
Fasteners: 304 stainless steel.
Horizontal and vertical pipe (installer supplied):
Minimum requirement of 2” ASTM A53B Schedule 40 galvanized steel pipe.
Concrete (installer supplied):
Rated for a minimum of 2,500 pounds per square inch.
*See Appendix B for different clamp congurations.
SYSTEM COMPONENTS

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
3
Components and quantities speci c to your installations are listed on
your quotation.
MODULE MOUNTING COMPONENTS
Standard Series Clamps
Secure modules to rail with 0.25”
gap between modules.
Pro Series Clamps
Secure modules to rail with 1”
gap between modules.
Universal AF Clamps
Secure modules to rail with 0.5” gap
between modules
Note: Standard Series, Pro Series, and Universal AF clamps are single use only.
SYSTEM COMPONENTS
S.NO. DESCRIPTION PART NUMBER
1SM ENDCLAMP B CLR AL 302021C
2SM ENDCLAMP B DRK AL 302021D
3SM ENDCLAMP C CLR AL 302022C
4 SM ENDCLAMP C DRK AL 302022D
5 SM ENDCLAMP D CLR AL 302023C
6 SM ENDCLAMP D DRK AL 302023D
7SM ENDCLAMP E CLR AL 302024C
8 SM ENDCLAMP E DRK AL 302024D
9 SM ENDCLAMP F CLR AL 302025C
10 SM ENDCLAMP F DRK AL 302025D
11 SM ENDCLAMP K CLR AL 302026C
12 SM ENDCLAMP K DRK AL 302026D
13 SM BND MIDCLAMP BC SS 302027C
14 SM BND MIDCLAMP BC DRK SS 302027D
15 SM BND MIDCLAMP EF SS 302028C
16 SM BND MIDCLAMP EF DRK SS 302028D
17 SM BND MIDCLAMP DK SS 302029C
18 SM BND MIDCLAMP DK DRK SS 302029D
19 SM MIDCLAMP PRO DRK 302030D
20 SM MIDCLAMP PRO MILL 302030M
21 SM ENDCLAMP PRO W/CAP 302035M
22 UNIVERSAL AF MID CLAMP DRK 302045D
23 UNIVERSAL AF MID CLAMP MILL 302045M
24 UNIVERSAL AF END CLAMP DRK 302050D
25 UNIVERSAL AF END CLAMP MILL 302050M
SYMBOL DESCRIPTION
AL ALUMINUM
CLR CLEAR ANODIZED
DRK DARK BRONZE ANODIZED
SS STAINLESS STEEL
DRK SS BLACK OXIDE COATED
STAINLESS STEEL
LETTER SUPPORTED MODULE
THICKNESS
B30MM -32MM
C33MM -36MM
D38MM -40MM
K39MM -41MM
F45MM -47MM
E50MM -51MM

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ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
4
FOUNDATIONS
Lay out and excavate leg positions
Consult the engineered plans to determine the North-South and East-West
foundation spacing. Establish a grid and mark the foundation locations. Verify that
all angles are square as shown in  gure 1.
*Visit unirac.com/technical-support/ for more information on Ground Screw installation.
SELECT AN ASSEMBLY SEQUENCE
Figure - 1 North-South leg spacing (A) is fi xed. East-West spacing (B₁, B₂, etc.) is
identical in most installations, see "Average leg spacing E-W " (Nominal Values under
"Design parameters") on page 2 of your Specs Sheet. However, if you needed to shift
leg positions, follow the east - west spacing you set during your planning session.
The assembly sequence depends on installer preference and the size
of the installation. Either of these options may be followed:
• If a ULA has just a few pairs (up to 3 pairs) of legs, installers
may prefer to assemble the full truss structure prior to pouring
concrete. See  gure 2
• On the larger ULA structures with many pairs (more than 3 pairs)
of legs, installers prefer to place the vertical leg pipes, pour the
concrete, and let it cure overnight before installing. See  gure 5.
Note: In either case, when mounting rails, be sure to center them on
the horizontal pipes, which will leave about 20 percent overhang on
north and south sides.
Figure 2
SYSTEM LAYOUT

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL PAGE
5
INSTALLATION GUIDE
CONCRETE FOUNDATIONS
Prepare Foundation Holes
Dig foundation holes to the “Footing diameter” and “Footing depth” listed on page 2 of your Specs Sheet.
Ensure holes are dug to the tolerances shown in gure 3. Verify that the footings extend below the frost line.
If shallow ground water is encountered, over excavating 4” and back lling with gravel no smaller than ¼” can
be used to facilitate concrete placement. Concrete can not be placed in standing water.
Prepare Vertical Pipes
At the bottom of the vertical pipes, install a piece of rebar, threaded cap or bolts. This step prevents withdrawal
from the footing. See gure 4.
Pour Concrete & Position Pipes
Using wood braces to position the pipes to ensure they are level , square and aligned. Use a string line, laser
level or transit to level the tops of the pipes down the row. See gure 5.
Place pipes and pour concrete. Shape the concrete to slope away from the legs to promote drainage away from
the pipes. Allow concrete to cure before proceeding. See Figure 6.
Figure-4
Figure-5
Figure-3
Figure-6
SYSTEM LAYOUT
Acceptable Tolerances for
Foundation Holes
Diameter -1"
Depth -2"

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
6
ASSEMBLY
Install sliders and braces as congured in the engineered plans. A forgotten slider can result in extensive disassembly. Make sure all of them are in place before
proceeding. Consult the engineered plans to determine the conguration and placement of braces.
Torque all fasteners to the values shown below:
• Set screws for leg caps and sliders: 15 foot-pounds.
• 3/8-inch serrated ange nuts for U-bolts and rail brackets: 8 foot-pounds
• ¼-inch module mounting hardware: 10 foot-pounds
Cut brace to length and drill a
hole on the centerline, 1” from
end.
If pipe couplers are used, avoid conicts by placing them
one-quarter to one-third of the way between leg caps and
midway between rail brackets.
Secure any braces to the caps and tighten the
screws.
Repeat this process on the South
row using front caps.
Install sliders onto pipe and
tighten set screws.
Install brace onto slider and
secure with provided hardware.
Place rear caps onto the North
(taller) pipes and tighten screws.
Slide the horizontal pipe into
the caps and and tighten screws.
IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
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D D
IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER
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IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER
IMAGE-4-INSTALL REAR CAP ON NORTH PIPE
IMAGE-5-INSTALL HORIZONTAL PIPE
IMAGE-6-RAIL BRACKET INSTALL
IMAGE-7-TIGHTEN SCREWS
IMAGE-8-SECURE BRACES
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B B
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IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER
IMAGE-4-INSTALL REAR CAP ON NORTH PIPE
IMAGE-5-INSTALL HORIZONTAL PIPE IMAGE-6-RAIL BRACKET INSTALL
IMAGE-7-TIGHTEN SCREWS
IMAGE-8-SECURE BRACES
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B B
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D D
IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER
IMAGE-4-INSTALL REAR CAP ON NORTH PIPE
IMAGE-5-INSTALL HORIZONTAL PIPE
IMAGE-6-RAIL BRACKET INSTALL
IMAGE-7-TIGHTEN SCREWS
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D D
*See page 7 for GFT Rail Install
IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER IMAGE-4-INSTALL REAR CAP ON NORTH PIPE
IMAGE-5-INSTALL HORIZONTAL PIPE
IMAGE-6-RAIL BRACKET INSTALL
IMAGE-7-TIGHTEN SCREWS
IMAGE-8-SECURE BRACES
IMAGE-9-REPEAT ON SOUTH ROW
IMAGE-10-ALTERNATE RAIL BRACKET ORIENTATION
IMAGE-6 PIPE COUPLER LOCATION
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IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER IMAGE-4-INSTALL REAR CAP ON NORTH PIPE
IMAGE-5-INSTALL HORIZONTAL PIPE
IMAGE-6-RAIL BRACKET INSTALL
IMAGE-7-TIGHTEN SCREWS
IMAGE-8-SECURE BRACES
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B B
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D D
IMAGE-1-BRACE CUT LENGTH
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1"
~1/2 Bracket - Bracket
~1/4 or 1/3 Post - Post
IMAGE-1-BRACE CUT LENGTH
IMAGE-2-INSTALL BRACE ON SLIDER
IMAGE-3-INSTALL BRACE ON SLIDER IMAGE-4-INSTALL REAR CAP ON NORTH PIPE
IMAGE-5-INSTALL HORIZONTAL PIPE
IMAGE-6-RAIL BRACKET INSTALL
IMAGE-7-TIGHTEN SCREWS
IMAGE-8-SECURE BRACES
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B B
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D D
SYSTEM ASSEMBLY

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
7
ASSEMBLY
Plan Bracket, Rail & Clamp Layout
Before installing rails, plan the layout and locations of Brackets, Rails and Modules to identify and resolve any conicts with Front and Rear Caps. Measure and
mark each module column on the horizontal pipe. Then, mark bracket and rail locations.
If a conict is discovered, resolve it by using one or both of the methods shown below.
Install the bracket onto a top rail and torque it.
TORQUE VALUE
3/8" Serrated ange nut for U-Bolt to 8 ft-lbs
Center the rail over the horizontal pipes with
overhangs on North and South sides of the array.
Secure the rail onto the bracket with the provided
hardware by torquing the self threading bolt until
it punctures and is snug to the rail.
Above images show the different Install
orientations for Rail Bracket on rail.
NOTE:
1. If desired, North-South columns
of modules can be pre-fabricated,
mounted to rails and wired on
the ground, or even off site, then
lifted into position and secured
to the horizontal pipes.
2. Please see design guide or
U-Builder for guidance on rail
type and bracket quantity.
Solution-1 Shift rail & bracket east-west Solution-2 Flip bracket connection to another slot
IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
IMAGE-3-CONFLICT-1
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D D
IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
IMAGE-3-CONFLICT-1
IMAGE-4-SOLUTION-FLIP THE BRACKET TO THE OPPOSITE SIDE
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IMAGE-1-CONFLICT-1
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B B
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D D
IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
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IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
IMAGE-3-CONFLICT-1
IMAGE-4-SOLUTION-FLIP THE BRACKET TO THE OPPOSITESIDE
IMAGE-8-ALTERNATE RAIL BRACKET ORIENTATION
IMAGE-7-RAIL BRACKET INSTALL
IMAGE-5 BRACKET INSTALL
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D D
IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
IMAGE-3-CONFLICT-1
IMAGE-4-SOLUTION-FLIP THE BRACKET TO THE OPPOSITE SIDE
IMAGE-7-ALTERNATE RAIL BRACKET ORIENTATION
IMAGE-6-RAIL BRACKET INSTALL
IMAGE-5 BRACKET INSTALL
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B B
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D D
IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
IMAGE-3-CONFLICT-1
IMAGE-4-SOLUTION-FLIP THE BRACKET TO THE OPPOSITE SIDE
IMAGE-8-ALTERNATE RAIL BRACKET ORIENTATION
IMAGE-7-RAIL BRACKET INSTALL
IMAGE-5 BRACKET INSTALL
IMAGE-6 BRACKET INSTALL ON RAIL
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B B
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IMAGE-1-CONFLICT-1
IMAGE-2-SOLUTION-SHIFT BRACKET EW
IMAGE-3-CONFLICT-1
IMAGE-4-SOLUTION-FLIP THE BRACKET TO THE OPPOSITESIDE
IMAGE-8-ALTERNATE RAIL BRACKET ORIENTATION
IMAGE-7-RAIL BRACKET INSTALL
IMAGE-5 BRACKET INSTALL
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B B
C C
D D
SYSTEM ASSEMBLY

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
8
INSTALL MICROINVERTER MOUNT T-BOLT:
Apply Anti-Seize and install pre-assembled ¼” dia. bonding T-bolts into
top ¼” rail slot at microinverter locations. Rotate bolts into position.
INSTALL MICROINVERTER:
Install microinverter on to rail. Engage with bolt.
INSTALL MICROINVERTER:
Torque 1/4” nut to 10 ft-lbs with Anti-Seize.
ALIGN POSITION INDICATOR:
Verify that position indicator on bolt is perpendicular
to rail.
MICROINVERTER MOUNTING









NOTE: MLPE Mount is certied for single use only.

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
9
GROUNDING LUG MOUNTING DETAILS:
Details are provided for both the WEEB and Ilsco products. The WEEBLug has a
grounding symbol located on the lug assembly. The Ilsco lug has a green colored
set screw for grounding indication purposes. Installation must be in accordance
with NFPA NEC 70, however the electrical designer of record should refer to the
latest revision of NEC for actual grounding conductor cable size.
WEEBLUG CONDUCTOR - UNIRAC P/N 008002S:
Apply Anti Seize and insert a bolt in the aluminum rail and through the clearance hole
in the stainless steel  at washer. Place the stainless steel  at washer on the bolt,
oriented so the dimples will contact the aluminum rail. Place the lug portion on the
bolt and stainless steel  at washer. Install stainless steel  at washer, lock washer and
nut. Tighten the nut until the dimples are completely embedded into the rail and lug.
TORQUE VALUE 10 ft lbs.
See product data sheet for more details, Model No. WEEB-LUG-6.7
ILSCO LAY-IN LUG CONDUCTOR - UNIRAC P/N 008009P: Alternate Grounding Lug
- Drill, deburr hole and bolt thru both rail walls per table.
TORQUE VALUE 5 ft lbs.
See ILSCO product data sheet for more details, Model No. GBL-4DBT.
NOTE: ISOLATE COPPER FROM ALUMINUM CONTACT TO PREVENT CORROSION
GROUNDING LUG - BOLT SIZE & DRILL SIZE
GROUND LUG BOLT SIZE DRILL SIZE
WEEBLug 1/4" N/A - Place in Top SM Rail Slot
IlSCO Lug #10-32 7/32"
• Torque value depends on conductor size.
• See product data sheet for torque value.
STANDARD SYSTEM GROUNDING

ONLY ONE LUG PER ARRAY:
Only one lug per array is required.
TERMINAL TORQUE,
Install Conductor and
torque to the following:
4-6 AWG: 35in-lbs
8 AWG: 25 in-lbs
10-14 AWG: 20 in-lbs
Star Washer is
Single Use Only
WEEBLUG
Single Use Only
TERMINAL TORQUE,
Install Conductor and
torque to the following:
6-14 AWG: 5ft-lbs

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ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
10
Standard Series Clamps: Endclamp & First Module
INSTALL MODULE ENDCLAMPS: The Endclamp is
supplied as an assembly with a T-bolt, serrated  ange
nut, and washer. The washer retains the clamp at the
top of the assembly. This will enable the clamp to
remain upright for module installation.
INSTALL FIRST MODULE: Install the  rst end module
onto rails. Engage module frame with Endclamps.
Verify that the position indicator & T-bolt shaft are
angled in the correct position.
TORQUE VALUE 1/4” nuts to 10 ft-lbs. w/Anti Seize NOTE: *See appendix for additional clamp con gurations
POSITION INDICATOR - SERRATED T-BOLT: Verify the
T-bolt position indicator is perpendicular to the rail.
INSERT ENDCLAMP T-BOLT: Insert 1/4” T-bolt into
rail.
ROTATE ENDCLAMP T-BOLT: Rotate T-bolt into
position. Verify that the position indicator & T-bolt
shaft are angled in the correct position.
End clamps are positioned on rails prior to the  rst
end module and installed after the last end module.
 

ULAPLANNING AND
ASSEMBLY
INSTALLATION MANUAL INSTALLATION GUIDE PAGE
11
Standard Series Clamps: Bonding Midclamp
ROTATE MIDCLAMP T-BOLT: Rotate bolt into position
and slide until bolt and clamp are against module
frame. Do not tighten nut until next module is in
position. Verify that the position indicator & T-bolt
shaft are angled in the correct position.

INSERT MIDCLAMP T-BOLT: Apply Anti-Seize and
insert 1/4” T-bolt into rail.
INSTALL MIDCLAMPS: Midclamp is supplied as
an assembly with a T-bolt for module installation.
Clamp assemblies may be positioned in rail near
point of use prior to module placement.



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INSTALLATION MANUAL INSTALLATION GUIDE PAGE
12
Standard Series Clamps: Remaining Modules
POSITION T-BOLT ALIGNMENT MARKS & CUT RAIL:
Verify that the position indicator(s) & T-bolt shaft(s)
are angled in the correct position. Trim off any
excess rail, being careful not to cut into the roof.
Allow ½” between the Endclamp and the end of the
rail.
INSTALL ENDCLAMPS:
Apply Anti-Seize and install nal Endclamps in same manner
as rst Endclamps. Slide clamps against module.
TORQUE VALUE
1/4” nuts to 10 ft-lbs. w/Anti Seize


1/2"
MIN.
INSTALL REMAINING MID-CLAMPS:
Proceed with module installation. Engage each module with
previously positioned Midclamp assemblies.
NOTE: Apply Anti-Seize to each Mid Clamp prior to
installation.
POSITION T-BOLT ALIGNMENT MARKS:
Verify that the position indicator(s) & T-bolt
shaft(s) are angled in the correct position.
TORQUE VALUE
1/4” nuts to 10 ft-lbs. w/Anti Seize
Trim installation Instructions







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BONDING MICROINVERTER MOUNT RACK SYSTEM GROUND
Hex nut with captive lock washer bonds metal
microinverter  ange to stainless steel T-bolt.
Serrated T-bolt head penetrates rail anodization to
bond T-bolt, nut, and L-foot to grounded SM rail
WEEB washer dimples pierce anodized rail to create bond
between rail and lug
Solid copper wire connected to lug is routed to provide  nal
system ground connection.
NOTE: Ilsco lug can also be used when secured to the side of
the rail.
WEEBLUG (OR ILSCO LUG)
SM RAILSM RAIL
2
2
2
2
1
1
1
1
SM RAIL
MICRO-INVERTER FLANGE
HEX NUT W/ CAPTIVE
LOCK WASHER
BONDING
T-BOLT
SOLID COPPER WIRE
Aluminum mid clamp with stainless steel bonding pins that pierce
module frame anodization to bond module to module through
clamp.
Stainless steel nut bonds aluminum clamp to stainless steel T-bolt
Serrated T-bolt head penetrates rail anodization to bond T-bolt, nut,
clamp, and modules to SM rail
BONDING MIDCLAMP ASSEMBLY
MODULE FRAME
SM RAILSM RAIL
MODULE FRAME
BONDING T-BOLT
2
2
2
1
1
1
3
3
3
Bonding Connections & Grounding Paths

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Horizontal Beam
Horizontal Beam
Rail
Fault Current
Ground Path
Module Grounding
Lug
Rail Grounding
Lug
Bonding Mid Clamp
Min. 10 AWG, 105°C
Copper Wire
Note: Every array must have at
least one grounding lug either
module grounding lug or rail
grounding lug.
Bonding Connections & Grounding Paths

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INSTALLATION MANUAL INSTALLATION GUIDE PAGE
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Bonding Connections & Grounding Paths
Fault Current Ground
Path
Bonding Connection
Optional Cross Brace
Ground
Note: Cross bracing is optional for concrete
foundation system.
Min. 10 AWG, 105°C
Copper Wire
Rail Grounding
Lug

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INSTALLATION MANUAL PAGE
16
INSTALLATION GUIDE
CODE COMPLIANCE NOTES
UL2703 CERTIFICATION MARKING LABEL Unirac ULA is listed to UL 2703. Certi cation marking is
embossed on all mid clamps as shown. Marking Labels are shipped with the Mid clamps. After the
racking system is fully assembled, a single Marking Label should be applied to the rail at the edge of
the array. Before applying the label, the corners of the label that do not pertain to the system being
installed must be removed so that only the installed system type is showing. Note: The sticker label
should be placed such that it is visible, but not outward facing.
Conduct periodic inspections for loose components, loose fasteners or any corrosion.
Any components showing signs of damage that compromise safety shall be replaced immediately.
PERIODIC INSPECTION

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INSTALLATION MANUAL SYSTEM CERTIFICATION PAGE
17
APPENDIX A
The ULA system has been certied 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 and mechanical load testing.
In conducting these tests, specic modules are selected for their physical properties so that the certications can be broadly applied. The following lists the
specic modules that were tested and the applicability of those certications to other modules that might come onto the market.
In addition to UL 2703 certication, Unirac performs internal testing beyond the requirements of certication tests in order to establish system functional
limits, allowable loads, and factors of safety. These tests include functional system tests, and destructive load testing.
Note:
• Please refer U-Builder engineering report or stamped engineering package for information on mechanical load ratings, spans and cantilevers.
• Load ratings mentioned above are applicable for modules on table not on substructure.
Mechanical Load Test Modules
The modules selected for UL 2703 mechanical load testing were
selected to represent the broadest range possible for modules on
the market. The tests performed cover the following basic module
parameters:
• Frame thicknesses greater than or equal to 1.0 mm
• Basic single and double wall frame proles (some complex frame
proles could require further analysis to determine applicability)
• Clear and dark anodized aluminum frames
• PV modules may have a reduced load rating, independent
of the ULA load rating. Please consult the PV module
manufacturer’s installation guide for more information.
Tested Modules
Module
Manufacturer
Model/Series Area
[sqft]
UL2703 Certication
Load Ratings
Hyundai HiS-S325TI 21.06 Down– 113 PSF, Up – 50 PSF
Down-Slope – 15 PSF
SunPower SPR-P19-395-COM 22.20 Down– 113 PSF, Up – 50 PSF
Down-Slope – 15 PSF
First Solar FS-6xxx-P 27.12 Down– 33.9 PSF, Up – 33.9 PSF
Down-Slope – 16.5 PSF

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INSTALLATION MANUAL SYSTEM CERTIFICATION PAGE
18
APPENDIX A
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 UNIRAC LARGE ARRAY system.
Manufacture Module Model / Series
Aleo P-Series & S-Series
Aptos Solar
DNA-108-(MF/BF)10-xxxW
DNA-120-(MF/BF)10-xxxW
DNA-120-(MF/BF)23
DNA-144-(MF/BF)23
DNA-120-(MF/BF)26
DNA-144-(MF/BF)26
Astronergy
CHSM6612 M, M/HV
CHSM6612P Series
CHSM6612P/HV Series
CHSM72M-HC,
Auxin
AXN6M610T,
AXN6P610T,
AXN6M612T
AXN6P612T
Axitec
AC-xxx(M/P)/60S, AC-xxx(M/P)/72S
AC-xxxP/156-60S
AC-xxxMH/120(S/V/SB/VB)
AC-xxxMH/144(S/V/SB/VB)
Boviet BVM6610, BVM6612
BYD P6K & MHK-36 Series
Manufacture Module Model / Series
Canadian Solar
CS1(H/K/U/Y)-MS
CS3K-(MB/MB-AG/MS/P/P HE/PB-AG)
CS3L-(MS/P)
CS3U-(MB/MB-AG/MS/P/P HE/PB/PB-AG)
CS3W-(MS/P/P-PB-AG)
CS3W-MB-AG
CS3Y-MB-AG
CS5A-M
CS6K-(M/MS/MS AllBlack/P/P HE)
CS6P-(M/P)
CS6R-MS-HL
CS6U-(M/P/P HE)
CS6W-MS
CS6W-MB-AG
CS6X-P
CSX-P
ELPS CS6(A/P)-MM
Centrosolar America C-Series & E-Series
CertainTeed
CT2xxMxx-01, CT2xxPxx-01, CTxxxMxx-01,
CTxxxPxx-01, CTxxxMxx-02, CTxxxMxx-03
CTxxxMxx-04, CTxxxHC11-04
Eco Solargy Orion 1000 & Apollo 1000
EMMVEE
ExxxP72-B
ExxxM72-B
ExxxH CM120-B
ET Solar ET AC Module, ET Module,
ET-M772BH520-550WW/WB
Flextronics FXS-xxxBB
Manufacture Module Model / Series
Freedom Forever FF-MP-BBB-xxx, FF-MP1-BBB-xxx
GCL GCL-P6 & GCL-M6 Series
Hansol TD-AN3, TD-AN4,
UB-AN1, UD-AN1
Hanwha SolarOne HSL 60
Heliene 36M, 36P 60M, 60P, 72M & 72P Series,
144HC M10 SL Bifacial
HT Solar
HT72-156(M/P),
HT72-156P-C, HT72-156P(V)-C
HT72-156M(PDV)-BF, HT72-156M(PD)-BF,
HT72-166M, HT72-18X,
HT60-156M-C,
HT60-156M(V)-C
Hyundai
KG, MG, RW, TG, RI, RG, TI, KI, HI Series
HiA-SxxxHG, HiD-SxxxRG(BK), HiS-S400PI
HiS-SxxxYH(BK)
HiS-SxxxXG(BK)
The modules selected for UL 2703 bonding and grounding testing represent the broadest possible range of modules on the market. The tests were performed for each specic bond-
ing location using representative module frame prole sections. The tests performed cover the following basic module parameters:
• The frame prole must not have any feature that might interfere with the bonding devices that are integrated into the racking system
• Use with a maximum over current protection device OCPD of 30A
• Unless otherwise noted, all modules listed above include all wattages and specic models within that series. Variable wattages are represented as "xxx"
• Items in parenthesis are those that may or may not be present in a compatible module's model ID
• Slashes "/" between one or more items indicates that either of those items may be the one that is present in a module's model ID