APC SILCON 10-40KW 400V UPS User Manual
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Installation Guide APC Silcon 10-40kW 400V UPS
990-4050
Thank You!
Thank you for chosing the APC Silcon Series UPS. Please read this Installation Guide 
thoroughly prior to installing the system. It provides important information on safe and 
efficient installation.
The installation and use of this product must comply with national, federal, state, municipal 
and local codes.
Safety Symbols used in this manual
WARNING!
Indicates a hazard which, if not avoided, could result in injury or death.
CAUTION!
Indicates a hazard which, if not avoided, could result in damage to the 
product or other property.
NOTICE!
Read and pay attention to this important information.
WARNING!
This UPS unit contains hazardous AC and DC voltages. Only qualified electricians should install 
the UPS, AC line and external batteries, and must be familiar with batteries and battery 
installation.
Before installing, maintaining or servicing the UPS, shut off the UPS and disconnect all sources 
of AC and DC power.
As the UPS has no built-in disconnection devices to switch off external AC and DC input power, 
ensure that disconnection devices are provided as separate parts in connection with the 
installation!
The installer must provide each external disconnecting device for this UPS system with labels 
with the following text:
“Isolate the Uninterruptible Power Supply (UPS) as instructed in this guide before working on 
circuit”
AC and/or DC voltage will always involve a potential risk of AC voltage at UPS output generated 
from either batteries or mains. To avoid equipment damage or personal injury, always assume 
that there may be voltage at UPS output.
This system is equipped with an auto-start function. If activated, the system may start without 
warning. Refer to the “Programming” section of this guide for information on de-activation.
TEST BEFORE YOU TOUCH!
To reduce the risk of fire or electric shocks, install the UPS and external batteries in a 
temperature and humidity controlled indoor area, free of conductive contaminants.
UPS batteries are high-current sources. Shorting battery terminals or DC terminals, DC busbars 
can cause severe arcing, equipment damage and injury. A short circuit can cause a battery to 
explode. Always wear protective clothing and eye protection and use insulated tools when 
working on batteries.
CAUTION!
This unit contains components sensitive to electrostatic discharge (ESD). If you do not follow the 
ESD procedures, you may cause severe damage to electronic components.