UMI-B1 UL Series Inverter Installation guide
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3 Installation guide
The chapter describes the mechanical installation and electric installation.
• Only qualified electricians are allowed to carry out what described in
this chapter. Operate as the instructions in Safety Precautions.
Ignoring these may cause physical injury or death or damage to the
devices.
• Ensure the power supply of the inverter is disconnected during the
operation. Wait for at least the time designated after the disconnection
if the power supply is applied.
• The installation and design of the inverter should be complied with the
requirement of the local laws and regulations in the installation site. If
the installation infringes the requirement, our company will exempt
from any responsibility. Additionally, if users do not comply with the
suggestion, some damage beyond the assured maintenance range
may occur.
3.1 Mechanical installation
3.1.1 Installation environment
The installation environment is the safeguard for a full performance and long-term stable
functions of the inverter. Check the installation environment as follows:
14~122°F (-10~50°C), and the temperature changing rate is less
than 0.9°F (0.5°C )/minute.
If the ambient temperature of the inverter is above 104°F (40°C ),
derate 1% for every additional 1.8°F (1°C ).
It is not recommended to use the inverter if the ambient
temperature is above 122°F (50°C ).
In order to improve the reliability of the device, do not use the
inverter if the ambient temperature changes frequently.
Provide cooling fan or air conditioner to control the internal ambient
temperature below the required one if the inverter is used in a close
space such as in the control cabinet.
When the temperature is too low, if the inverter needs to restart to
run after a long stop, it is necessary to provide an external heating
device to increase the internal temperature, otherwise damage to
the devices may occur.
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