Installation and Operation Guide SOLECTRIA® PVI 25TL-208, PVI 50TL-480 and PVI 60TL-480
DOCR-071030-A (10/7/2022)
Page 23 of 131
NOTICE!
Outdoor Installations that are Left for Extended Periods of Time without Power:
Yaskawa Solectria Solar advises
against leaving inverters mounted outdoors for an extended period of time (more than 90 days) or exposing the
inverters to cycles of freezing temperatures without both DC and AC power connected to the inverters.
The inverter enclosures are tested and rated NEMA 4X. However, there exists the possibility of water
condensation inside the inverter enclosure when it is left exposed to an outdoor environment without power for
an extended period of time. Humidity can enter the power head through a small opening between itself and the
wiring box. When the inverter is exposed to temperature swings, especially in cold weather, moisture inside the
inverter power head could condense over the aluminum heatsink area where inverter semiconductors are
mounted. Water droplets on the heatsink may cause a short circuit on live semiconductor devices. When a PV
source is applied to the inverter, this PV power source could cause the inverter to fail and result in a short circuit
across the PV array.
If the inverter is mounted outdoors without operating power for an extended period of time, Yaskawa Solectria
Solar recommends that the inverter power head be inspected for water condensation before any DC or AC power
is applied to the inverter. Without inspection, customers run the risk of having electronic circuit damage when
power is applied to the inverter during startup. It is advised that customers contact the Yaskawa Solectria Solar
service department at +1 (978) 683-9700 x2 for further advice and to schedule an inspection of the inverters on-
site.
This Installation Section is broken into three sub-sections: Mechanical Installation, Electrical Installation and
Communications Installation.
Each subsection begins with general requirements and guidelines which must be considered when designing a
system and planning the installation. Each sub-section is concluded with detailed systematic instructions to install
the SOLECTRIA PVI 25TL-208, PVI 50TL-480, or PVI 60TL-480 inverter.
Installation Sequence Overview
1.
Install the Mounting Bracket.
2.
Install the Power Head.
3.
Remove bulkhead connector cover from top of Wiring Box.
4.
Install the Wiring Box.
5.
Connect the Power Head and Wiring Box together.
6.
Confirm that the site AC breaker is set to OFF.
CAUTION
Lifting Heavy Object Hazard:
Proper lifting techniques must be used in order to avoid injuries. The Power Head
weighs 123.5 pounds (56 kg).
