Install Manual

Introduction
2
System Fire Ratings
Roof Slope
Module*
1
Fire Rating*
2
Steep Slope
(2/12)
Type 1 & 2
Class A
Low Slope
(<2/12)
Type 1&2
Class A
*1: Module Type per UL 1703 (November 18, 2014).
*2:
Class A fire rated PV systems can be installed on Class A, B, and C roofs.
*3: PV Modules can be installed in landscape or portrait configuration
Bonding / Grounding of Modules
This racking system may be used to ground and/or bond a PV module complying
with UL 1703 only when the specific module has been evaluated for grounding
and/or mounting in compliance with the Roof Tech’s UL2703 classification.
Periodic Inspection
Roof Tech Inc. recommends
inspecting installed racking
system periodically for loose
components, loose fasteners and
any corrosion. If found, those
components are to be re-tightened,
or replaced immediately.
Caution: When a PV module needs
to be removed from the PV array
for maintenance and/or
replacement, the electric bonding
system will need to be temporarily
restored to maintain the electrical
bonding path. Please make sure
the system electrical circuits and disconnects are in the open position and the
entire system is powered down. Use adequate components that have evaluated
to Roof Tech’s UL2703 (see page 10) or AGW 8 copper bonding conductor/strap
with ILSCO SGB-4 as the example above. Cover the fronts of modules in the
array with an opaque material to stop the production of electricity. Use
appropriate safety equipment such as insulated tools and insulating gloves to
protect yourself.
Maintenance of the PV modules should be carried out by licensed contractors,
according to the PV manufacturers installation/maintenance instructions and
Roof Tech’s installation instructions. Above maintenance should not be
conducted under a wet and/or high wind conditions.
Example of Temporary Bonding Path