Installation Guide

Page 9 of 10
EXD 8.5-001 PV Module User Manual_REV.02 Effective Date: July 8
th
, 2019
Grounding
 All module frames and mounting racks must be accordance with CEC, NEC and
applicable local codes.
 It is recommended that modules be grounded. For grid connected modules in U.S
and Canada: All PV modules must be grounded by electrical connection from the
module frames to the ground. A UL-listed grounding lug or UL approved clamp is to
be used.
 Connect modules frames to each other using cables with cable lugs. All connections
on the conductive connection must be fixed. Metal containing iron in the
conductive connection should be treated against corrosion and rusting.
 Another method is to ground the frame of the module to racking structure in
accordance with NEC.
 Self-Tapping screw (10 x ¾ size) can be used to attach a wire terminal loop to one
of the 4mm Grounding Holes. Also Grounding connections using spikes into the
surface clamping point (IE. WEEB) which are UL approved permitted.
 A UL-Listed grounding lug may be used if the mounting holes are not
used for mounting (ie. Clamps. 9mm (0.354”) diameter
mounting/grounding hole accept M8-5/16” bolts onto the module
frame).
 Where common grounding hardware (nuts, bolts, star washers, spilt-
ring lock washers, flat washers and the like) is
used to attach a listed grounding/bonding device,
the attachment must be made in conformance
with the grounding device manufacturer’s instructions.
 Common hardware items such as nuts, bolts, star washers, lock washers and the like have not been evaluated for
electrical conductivity or for use as grounding devices and should be used only for maintaining mechanical
connections and holding electrical grounding devices in the proper position for electrical conductivity. Such
devices, where supplied with the module and evaluated through the requirements in UL 1703, may be used for
grounding connections in accordance with the instructions provided with the module.
7.4 Fire Rating
 The Fire Rating of this module is valid only when mounted in the manner specified in the “6.2.2 Mechanical
Mounting Instructions”. Heliene Inc. Modules are certified to Class C Fire rating.
 When installing the modules, please ensure the assembly is mounted over a fire resistant roof covering rated for
the application and required a slope less than 5 in/ft (127mm/305mm) to maintain fire class rating.
 The Fire rating of the module is valid only when mounted in the manner specified in the mechanical mounting
instructions.
7.5 Maintenance
 Visual inspection should be done on the PV array regularly for damages on glass, cable and junction box. As this
will result in operation/performance and safety problems.
 Clean PV modules will improve the optical performance. It is recommended this process being done when
irradiance is below 200W/m2. Use clean water with low calcium concentration without any detergents or
abrasives. Do not scratch the glass through the process, also it is recommended to use similar temperature
liquid so thermal shock on the glass could be avoided.
 Test the wiring and connection at least once year, including the integrity and waterproof of all the parts that
make up the wiring and connections. This process should be done by qualified personnel duly trained and
equipped for the job.
 No serviceable parts within the PV module assembly. Consult Heliene Inc.
Example of Connecting in parallel after connected in series & Grounding