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SunEarth RexRack Installation Manual

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RexRack
SunEarth RexRack Installation Manual
Thank you for purchasing SunEarth's RexRack System. The
use of all stainless steel hardware and 6063-T6 structural alu-
minum make SunEarth's RexRack a simple, strong and dura-
ble solution for your racking needs. It accommodates tilt an-
gles from 20° to 60° from horizontal and is compatible with all
SunEarth solar collectors.
The RexRack components consist of 6063-T6 anodized alumi-
num mounting feet, support strut, rear leg as well as collec-
tors clips and stainless steel fasteners that can withstand the
harshest weather conditions. The components have factory
machined holes to expedite field installation.
SunEarth's RexRack has been designed to allow installation on
all roof types. Always maintain a tilt angle greater than 10°
from horizontal.
RexRack should not be used in areas that experience positive
panel loading (snow) greater than 60 psf or negative panel
loading (wind) greater than 60 psf. If expected loading ex-
ceeds these values please contact SunEarth for other mount-
ing options.
The use of mounting systems that do not conform to the ma-
SunEarth RexRack
terials and methods detailed in this or any of SunEarth's other
Low Slope Roof Installation
published installation manuals, guidelines, and technical bul-
letins is not recommended and may void your collector war-
ranty.
1
November, 2014 Rev.C

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Summary of Contents for SunEarth RexRack

  • Page 1 Always maintain a tilt angle greater than 10° from horizontal. RexRack should not be used in areas that experience positive panel loading (snow) greater than 60 psf or negative panel loading (wind) greater than 60 psf. If expected loading ex- ceeds these values please contact SunEarth for other mount- ing options.
  • Page 2 RexRack — Location The optimal siting of the solar collector is facing true south. If this is not possible the annual performance will suffer very little if the collector is oriented no more than 45° east or west of true south.
  • Page 3 RexRack — Tilt Kit Components Includes Verify that all components shown to the left have been received before proceeding with installation. Front Foot Assembly Part # MTG-FF-BA Qty. Description 1 ea. Front Hinge Bracket (Black Anodized Shown) Note: Mounting Feet should never be at- 1 ea.
  • Page 4 Example: 10070-158-324-BA = 1-5/8” Support Strut 27’ in Length and Black Anodized The Collector Mounting Assembly (C-SSN) Support Strut Splice* C-SSN attaches the collector to the RexRack, 4 Optional required per collector. 4 Required per Collector The Self Drilling Screws (14BW12X3/4)

  • Page 5: Leg Attachment

    RexRack — Assembly Details Front Foot The Front Foot assembly consists of the Front Hinge Bracket nesting in the Front Foot and attachment with one (1) fastener assembly per front foot. The low support strut is then nested in the Front Hinge Bracket and secured with three (3) self- drilling screws as shown.
  • Page 6 RexRack — Layout Portrait Configuration Only SunEarth’s RexRack layout is out- lined for the different RexRack mod- els dependent on collector and de- sired tilt angle. Please reference ap- propriate sheet for your application. SunEarth’s RexRack is not an appro-...
  • Page 7 RexRack — Support Strut Length, Copper Coupling Support Strut Calculate the required length of the Support Struts (10070-###-###- XX). This will be the widest feature of the row. The length of the support strut follows the formula outlined below. Support Strut Length = (# of Collectors) * (h + 0.125”) - (0.875”)
  • Page 8 RexRack — Support Strut Length, Union Calculate the required length of the Support Strut Support Struts (10070-###-###- XX). This will be the widest feature of the row. The length of the support strut follows the formula outlined below. (UNION-SET-1) Support Strut Length = (# of Collectors) * (h + 0.25”) + (2.5”)
  • Page 9 RexRack — Splice Information Support Strut Splice* Optional Support Strut is available in lengths up to 27’. If the calculated Support Strut length is longer than 27’ then a Support Strut Splice must be im- plemented. For 1-5/8” Support Strut the Sup-...
  • Page 10 RexRack — EC/EP/SB-40 Layout SunEarth Collector Part # EC/EP/SB-40 Table 6 provides detail on the proper placement of the RexRack feet for SunEarth Collector(s). If the rafter spacing is not 16” or 24” on center, position the RexRack feet such that the collector “overhang”...
  • Page 11 RexRack — EC/EP/SB-32 Layout SunEarth Collector Part # EC/EP/SB-32 Table 8 provides detail on the proper placement of the RexRack feet for SunEarth Collector(s). If the rafter spacing is not 16” or 24” on center, position the RexRack feet such that the collector “overhang”...
  • Page 12 RexRack — EC/EP/SB-24 Layout SunEarth Collector Part # EC/EP/SB-24 Table 9 provides detail on the proper placement of the RexRack feet for SunEarth Collector(s). If the rafter spacing is not 16” or 24” on center, position the RexRack feet such that the collector “overhang”...
  • Page 13 RexRack — EC/EP/SB-21 Layout SunEarth Collector Part # EC/EP/SB-21 Table 10 provides detail on the proper placement of the RexRack feet for SunEarth Collector(s). If the rafter spacing is not 16” or 24” on center, position the RexRack feet such that the collector “overhang”...
  • Page 14 Rear Telescoping Leg Assembly MTG-RTL- 9-12 Front Foot Assembly MTG-FF- 9-12 Self Drilling Screws 14BW12X3/4 Example: Given (6) SunEarth EP-40 collectors to be installed at a 45° tilt. Sample RexRack Parts list Item Length # of Parts Page Notes: Collector Mounting Assembly C-SSN 4 Per Collector.
  • Page 15 RexRack — Front Mounting Foot Installation 1. Mark the location of the Front Mounting Feet on the main mount- ing surface as outlined on Tables 6, 8, 9 & 10. 2. Securely fasten the Front Mounting Feet to the main mounting surface...
  • Page 16 RexRack — Rear Telescoping Leg Assembly Installation 1. Mark the location of the Rear Mounting Feet on the main mount- ing surface as outlined on Tables 6, 8, 9 & 10. 2. Securely fasten the Rear Mounting Feet to the main mounting surface...
  • Page 17 RexRack — Rear Telescoping Leg Assembly Installation 5. Set the Rear Telescoping Leg As- sembly length as outlined in Ta- bles 6, 8, 9 & 10. 6. Secure every Rear Leg Slider, shown in RED, to every Rear Leg with three (3) Self Drilling Screws as shown in Figure 5.
  • Page 18 RexRack — First Collector Placement 1. Place the first Collector face up on the Lower Support Strut with Upper Support Strut the lower end of the Collector overhung 5” beyond the Lower Support Strut. As shown in Fig- Collector ure 5.
  • Page 19 RexRack — First Collector Installation 4. Raise Collector. 5. Swing rear leg assembly and po- sition the Upper Support Strut so that it is 20% inboard of the Col- lectors top edge. As shown in Figure 6. 6. Install two (2) C-SSN Collector...
  • Page 20 1. Attach Rail Brackets to the Rail, using the scale integral to the Rail, at the appropriate Collector Support Strut spacing (x) and torque to 19 ft*lbs (26 N*m). SunEarth Collector # Support Strut Spacing (x) 91.75” EC/EP/SB-40-XX EC/EP/SB-32-XX 72.5”...
  • Page 21 RexRack — Collector Helping Hand Placement 1. Install two (2) Helping Hands on Collector per Table 4, shown in RED. Torque to 19 ft*lbs (26 N*m). 2. Place Collector on Rack. Allowing Collector to be supported by Helping Hands. Helping Hand...
  • Page 22 RexRack — Additional Collector Installation Copper Coupling Method 1. Slip two (2) copper couplings on the Collector headers. 2. Slide Collector into position while aligning header couplings. As shown in Figure 8. 3. With the Collector in position in- stall four (4) C-SSN, Collector Mounting Assemblies.
  • Page 23 RexRack — Additional Collector Installation Union Method 1. Slide Collector into position while aligning header Unions. As shown in Figure 10. 2. Insert O-Rings and tighten Un- ions ensuring that O-Ring is not damaged.* 3. With the Collector in position in- stall four (4) C-SSN, Collector Mounting Assemblies.
  • Page 24 RexRack — Drainback Considerations For drainback systems Collectors can 6” MINIMUM be angled in order to ensure the Col- lectors are fully drained when the pump stops. As shown in Figure 12. When angling Collectors a minimum distance of 6” must be maintained between the Collector ends and the Support Struts.
  • Page 25 Shown as in Figure 14. The brace consists of SolarStrut af- fixed to the RexRack Rear Telescop- ing Legs utilizing SSN-38 hardware assemblies. One (1) diagonal brace is required for every six (6) Collectors in a con- tinuous row.
  • Page 26 RexRack — Diagonal Brace Installation 3/8” Hole 1. Drill 3/8” hole 1-1/2” from the top of the Rear Telescoping Leg Slider. Shown as in Figure 2. Drill 3/8” hole 1-1/2” from the bottom of the adjacent Rear Tel- escoping Leg. Shown as Figure 16.
  • Page 27 AGREEMENT FOR THE SUNEARTH PRODUCTS LISTED ABOVE. THIS WARRANTY date of sale to the end user. SunEarth's liability for these SunEarth Products shall be limited to repairing or SUPERSEDES ANY PROPOSAL, AGREEMENT, OR REPSRESENTATION, OR ANY OTHER replacing at SunEarth's sole option, without charge, F.O.B. SunEarth's factory or an authorized SunEarth COMMUNICATION, EITHER WRITTEN OR ORAL, MADE BETWEEN SUNEARTH AND distributor or service center.