REC TwinPeak Series Installation Manual - UL 1703
Rev B - 03.15
Ref: NE-06-08-B
7
Part Name
Material
Specification
bolt
aSTM F593 (stainless steel)
1/4” x 20 - 5/8”
Flange Nut
aSTM F594 (stainless steel)
1/4” x 20
When using mounting holes, fixings must be fastened to 9 ft-lbs (12 Nm) of torque and installation must be according to fig. 6.
Install the above parts as shown in fig. 6. Consult the Unirac Code Compliant Installation Manual for further details where necessary. For
areas where discrepancy may exist, this installation manual shall take precedence.
iii) mounting holes
Mounting utilizing the four elongated holes (0.26 x 0.43 in (6.6 x 11 mm)) on the underside of the panel frame (at a distance of 17.72 in (450 mm) from
the midpoint of the long side) have been found to comply with UL 1703 requirements for a maximum design load of 75.2 lbs/ft² (3600 Pa) (fig. 5).
when mounting using mounting holes, the frame and panel edge must be supported by two transverse rails (fig. 1), of aluminium or galvanized steel
to avoid galvanic corrosion and be appropriate for the local environment. These must be held in position by bolts and flange nuts according to the
specifications below. if bought in a kit, do not use the washers and bottom mounted clips provided if they do not match the specifications below:
Mounting holes
Fig. 5: Mounting holes
Fig. 6: Mounting using
mounting holes
38
GR
GR
GR
GR
28
1665±2,5
900
382,5
950
991±2,5
17
45
11±0,2
6,6±0,2
20,5±0,5
vii) short side mounting using clamps
Mounting utilizing clamps on the two short sides of the panel have been found to be in compliance with UL 1703 requirements for a maximum design
load of 33.4 lbs/ft² (1600 Pa) (fig. 9).
•
Fix the panels so that the lower short side of the frame is supported by the mounting structure (to reduce risk of damages due to sliding snow load).
•
Clamps must be secured between a distance of 4.9 and 9.8 inches (125 – 250 mm) from the panel corner to the clamp edge.
•
Tightening torque must be tightened to 16 ft-lbs (21.7 Nm).
•
The minimum distance between the end clamp and the end of the rail is 1 in (25 mm).
•
Mechanical load must not exceed 33.4 lbs/ft (1600 Pa).
•
The overlap between support rail and frame must be a minimum of 1/4 in (6 mm).
In areas of snow build-up, panels can be subjected to forces in excess of the stated limit even when snow depth does not appear extreme,
causing damage to the framework. If the installation is likely to be affected, further suitable panel support is recommended on the lower
row of panels.
Ensure the drainage holes are not covered by the mounting structure.
vi) long side mounting using clamps
Mounting utilizing clamps on the two long sides of the panel have been found to be in compliance with UL 1703 requirements for a maximum design
load of 75.2 lbs/ft² (3600 Pa) (fig. 8).
•
Clamps must be secured between a distance of 8.2 in to 16.4 in (208 mm - 416 mm) from the corner of the panel (measured from the mid-point)
to the clamp edge.
•
Tightening torque must be tightened to 9 ft-lbs (12 Nm).
•
The distance between the end clamp and the end of the rail must be minimum 1 in (25 mm).
Fig. 8: Long side mounting
Fig. 9: Short side mounting
8.2”-
16.4”
1”
1”
4.9”-
9.8”
