Ver. 2.0U Dec. 4, 2008
- 2 - Installation Manual for PV modules
12.
Do not clean the glass surface with chemicals. Do not let water
stay on the glass surfaces of PV modules for a long time. This
creates a risk of permanent damage to the glass, such as white
efflorescence, otherwise known as “glass disease,” which may
cause reduced power output.
13.
To avoid dirt accumulation or white efflorescence due to water
accumulation, do not install PV modules horizontally (flat).
14.
In high snow load regions, appropriate measures are to be taken
so that PV module frames (on lower edges of the modules) will not
be damaged.
15.
Do not expose PV modules to sunlight concentrated with mirrors,
lenses or other means.
16.
Turn off inverters and circuit breakers immediately, should a
problem occur.
17.
The maximum open circuit voltage must not be greater than the
specified maximum system voltage. Voltage is proportional to the
number of PV modules in series and is affected by weather
conditions. For strings connected in parallel take proper measures
to block reverse current flow.
< HANDLING SAFETY >
1.
Do not expose the PV module to excessive loads on the surface of
the PV module or twist the frame. The glass may break.
2.
Do not stand or step on the PV module. The glass may be slippery,
and there is a risk of injury or electric shock if glass is broken.
3.
Do not hit or put excessive load on the glass or back sheet. PV
cells may break.
4.
To avoid damage to the back sheet, do not scratch or hit the back
sheet.
5.
To avoid damage to the terminal box and electricity leakage or
shock, do not hit the terminal box; do not pull the interconnect
cables; do not scratch the interconnect cable.
6.
Avoid the connector from scratching or impacting the back sheet of
the module.
7.
Install connector such that it is not exposed to direct sunlight.
8.
Do not twist the interconnect cable excessively.
9.
Never touch the end of the interconnect cables with bare hands
when the module is illuminated. Cover the surface of module with
cloth or other sufficiently opaque material to block the module from
incident light and handle the wires with insulated gloved hands to
avoid electric shock.
10.
Do not drill holes in the frame. It may compromise the frame
strength and cause corrosion of the frame.
11.
Do not scratch the anodized coating of the frame (except for
grounding connection). It may cause corrosion of the frame or
compromise the frame strength.
12.
Do not loosen or remove the screws from the PV module. It may
compromise the strength of the PV module and cause corrosion.
13.
Do not touch the PV module with bare hands. The frame of the PV
module has sharp edges and may cause injury. Wear suitable
gloves, such as leather gloves with padding in the palm and finger
areas.
14.
Do not drop the PV module or allow objects to fall on the PV
module.
15.
Do not lift the PV module by only one side. The frame may bend.
Always use two hands to lift and carry the PV module on the long
side of the frame.
16.
Some PV modules incorporate one or more support bars on the
back of the module. Do not mount or carry the PV module using
the support bar(s) on the back of the module.
< INSTALLATION SAFETY >
1.
Always wear protective head gear, insulating gloves and safety
shoes (with rubber soles).
2.
Keep the PV module packed in the carton until installation.
3.
Do not touch the PV module unnecessarily during installation. The
glass surface and the frame may be hot. There is a risk of burns
and electric shock.
4.
Do not work in rain, snow or windy conditions.
5.
Due to the risk of electrical shock, do not perform any work if the
terminals of the PV module are wet.
6.
Use insulated tools.
7.
Do not use wet tools.
8.
When installing PV modules, do not drop any objects (e.g., PV
modules or tools).
9.
Make sure flammable gasses are not generated or present near
the installation site.
10.
Insert interconnect connectors fully and correctly. Check all
connections.
11.
The interconnect cable should be securely fastened to the module
frame, the mounting racking or in a raceway to prevent movement
of the interconnect cable over time. Cable support should be done
in a way to avoid the connector from scratching or impacting the
back sheet of the module.
12.
Do not touch the terminal box and the end of the interconnect
cables (connectors) with bare hands during installation or under
sunlight, regardless of whether the PV module is connected to or
disconnected from the system.
13.
Do not unplug a connector if the system circuit is connected to an
operating load.
14.
Do not work alone (always work as a team of 2 or more people).
15.
Wear a safety harness when working above the ground.
16.
Do not wear metallic jewelry which may conduct electricity and
enable electric
shock during installation.
17.
Do not damage the back sheet of PV modules when fastening the
PV modules to a support by bolts.
18.
Do not damage the surrounding PV modules or mounting structure
when replacing a PV module.
19.
Use UV resistant cable ties or other wire management hardware to
secure the interconnect cables. Drooping cables may cause
various problems, such as leading to electrical shorts.
20.
Take proper measures for preventing the laminate (consisting of
encapsulant, cells, glass, back sheet, etc.) from dropping out of the
frame in case the glass is broken.
21.
Cables shall be located so that they will not be exposed to direct
sunlight in order to prevent degradation of the interconnect cables.
A-3. PV MODULE COMPONENTS
A-4. SITE SELECTION
PV modules should be installed in a location where there is no shading
throughout the year. In the northern hemisphere, PV modules should