CPS SCA Series, Installation And Operation Manual

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3.1 Recommendations Before Installation
See Chapter 10, Technical Data for specification ranges and limits.
NOTICE: DESIGN AND INSTALLATION RECOMMENDATIONS
Maintaining NEMA4X Rating in essential to assure safe operation of
the inverter. Water ingress is likely to cause a failure that could result
in an unsafe condition. The following are recommended

Addition of weep holes or any other hole will void the warranty.

For earlier wire box models with gland plate
– the conduit
connections must be strain reliefed to ensure the plate to gasket
interface is water tight. Water-tight metal flex conduit is one
method.

All conduit entries must be metallic to prevent propagation.

All conduit entries must be sealed to prevent moisture ingress.
o
Sealing conduits at the other end will provide additional
protection
– firestop putty may be used.

Separate conduits for + and
– DC cables may prevent arc
propagation outside of wire box.
NOTICE: The allowable ambient temperature ranges for the
SCA25KTL-DO/US-208
、
SCA50KTL-DO/US-480 and SCA 60KTL
-DO/US-480 3-Phase String Inverters are defined based on the
following conditions:
Condition 1: -40°C to 70°C, Inverter not installed, and in storage (in
packaging or unpackaged).
Condition 2: -30°C to 60°C, Inverter installed, connected to electric
utility grid and operating during daylight hours.
Condition 3: No low temp limit to 70°C, Inverter installed, connected
to electric utility grid but non-operating (daylight or nighttime hours).
Bulk head connector cover does not provide a water-tight seal.