2-4 Installation and Preparation PLZ-U
2.2 Precautions Concerning Installation
Location
This section describes the precautions to be taken when installing the product. Make
sure to observe them.
■ Do not use the PLZ-U in a flammable atmosphere.
To prevent the possibility of explosion or fire, do not use the PLZ-U near alcohol,
thinner or other combustible materials, or in an atmosphere containing such vapors.
■ Avoid locations where the PLZ-U is exposed to high tempera-
ture or direct sunlight.
Do not place the PLZ-U near a heater or in areas subject to drastic temperature
changes.
Operating temperature range: 0 °C to +40 °C (32 °F to 104 °F)
Storage temperature range: –20 °C to +70 °C (-4 °F to 158 °F)
■ Avoid humid environments.
Do not place the PLZ-U in high-humidity locations--near a boiler, humidifier, or
water supply.
Condensation may occur even within the operating humidity range. In such cases,
do not use the PLZ-U until the condensation dries up completely.
Operating humidity range: 20 % to 85 % RH (no condensation)
Storage humidity range: 0 to 90 % RH (no condensation)
■ Do not place the PLZ-U in a corrosive atmosphere.
Do not install the PLZ-U in a corrosive atmosphere or in environments containing
sulfuric acid mist, etc. This may cause corrosion of various conductors and bad con-
tacts of connectors inside the PLZ-U leading to malfunction and failure, or in the
worst case, a fire.
■ Do not place the PLZ-U in a dusty location.
Accumulation of dust can lead to electric shock or fire.
■ Do not use the PLZ-U where ventilation is poor.
The PLZ-U employs a forced air cooling system. Air is taken in from air inlets
located on panels other than the rear panel and exhausted from the air outlet on the
rear panel. Secure adequate space around the PLZ-U to prevent the possibility of
fire caused by accumulation of heat. Allow at least 20 cm of space between the air
inlet/outlet and the wall (or obstacles).
Hot air (approximately 20 °C higher than the ambient temperature) is exhausted
from the air outlet. Do not place objects that are affected by heat near the air outlet.
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