YASKAWA Solectria PVI 25TL-480-R Installation And Operation Manual page 17

Installation and Operation Guide SOLECTRIA PVI 25TL-480-R
 Check that the inverter environmental specifications (protection degree, operating temperature range,
humidity and altitude, etc.) meet the requirements of the specific project location.
 Make sure that the electric utility grid voltage is within range for the grid standard chosen.
 Ensure that the local electric utility grid authority has granted permission to connect to the grid.
 Installation personnel must be qualified electricians or those who have received professional training.
 Wear and use proper personal protective equipment (PPE) during installation.
 Sufficient space according to Figure 3-3 must be provided to allow the inverter cooling system to operate
effectively.
 Install the inverter away from flammable and/or combustible substances.
 Avoid installing the inverter in locations that exceed the temperature limits specified for the inverter to prevent
undesirable power loss.
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 wire-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 five sub-sections: Mechanical Installation, Wire-Box, DC Electrical Installation, AC
Electrical Installation, and Communications Installation.
DOCR-071030-A (11/17/2020)
PRE-INSTALLATION CHECKLIST
NOTICE!
Page 17 of 101