x
x
grip length
min 1.75 in
grip length
min 1.75 in
grip depth min 0.2 in
grip depth 0.2 in
Fig. 3: Clamp specifications
walls exposed to load
min 0.156 in
Fig. 1: Panel mounting options:
(b) rails parallel to the short side
(a) rails parallel to the long side
Rail positioning
Rail positioning
Rail positioning
Rail positioning
REC TwinPeak Series Installation Manual - UL 1703
Rev B - 03.15
Ref: NE-06-08-B
6
MoUNTiNg THE PaNELS
REC TwinPeak solar panels are designed for capturing solar radiation and are not suitable for installation as overhead or vertical glazing. The panels
are considered to be in compliance with UL 1703, only when the panel is mounted according to the the mounting instructions specified below. The
REC junction box on the back of the panel is protected to iP67 and hence panels can be mounted in any orientation.
panEl InstallatIon
i) Rail specifications
REC TwinPeak panels are typically installed on a rail-based mounting system. There are different methods of installing an REC TwinPeak panel, each
decribed below, depending on the design load of the array. The rails can run under the frame or parallel to the frame, directly under the clamping zones
(fig 1a & 1b). Ensure the mounting structure is able to withstand anticipated wind and snow loads.
walls for mechanical
connectors
walls exposed to
buckling load
Fig. 2: Rail specification
C channel rail
H channel rail
The clamps should be fastened to C or H channel rails (fig. 2).
•
Thickness of walls for mechanical connections: min. 0.156 in (4.0 mm)
•
Thickness of walls exposed to buckling load: min. 0.08 in (2.0 mm)
•
Moment of inertia for profile area about x-x: min array mounting diagram 0.4 in
4
(19.2 cm
4
)
The overlap between support rail and the outer edge of the panel frame must be a minimum of 1/64 in (6 mm).
ii) Clamp specification
REC TwinPeak panels have been evaluated by UL for mounting using C-channel-rails in combination with end and mid clamps, 5/16 in (8 mm) aSTM
F593C stainless steel screw and rail nuts. alternatively clamps with the below ratings and dimensions can be used to secure the panel to the
mounting structure (fig. 3):
•
Minimum yield strength of 2089 ton/ft² (200 Mpa)
•
Minimum tensile strength of 2610 ton/ft² (250 Mpa), e.g. 6005 T5 alloy.
•
Minimum grip length of 1.75 in (44.45 mm)
•
Minimum grip depth of 0.29 in (5 mm)
•
Minimum thickness of load carrying walls of 0.156 in (4 mm)
•
Screw connection – 5/16 in (8 mm) stainless steel bolt, 5/16 in split washer (8 mm), nut
Fig. 4: Panels secured at four points.
Each panel must be securely fixed to the mounting structure at a minimum of four points (fig.4).
Ensure a minimum distance of 4 in (100 mm) between the uppermost part of the roof and the lowest part of the panel to ensure sufficient
airflow beneath the panels, aiding cooling and boosting performance.
