Santak Castle On-Line Series User Manual page 6

Maintenance
1. The operation environment and store environment will impact on
the service lifetime and reliability of UPS.
Do not install or store the UPS in the places where are listed
below.
A. Do not install UPS in place where the ambient temperature
lower than 0℃ or higher than 40℃.
B. Do not install/store UPS in place where the relative humidity
lower than 20% or higher than 90%.
C. Do not install/store UPS in place where there is flammable
or corrosive gas, place with large amounts of conductive
dust, place exposed to shock or vibration, or outdoor.
2. If you would store the UPS for a long period, the storing area
temperature should be the range of -25°C to 55°C, and before
turning on UPS, it is highly suggested to put UPS in the ambient
temperature above 0°C and last at least 2 hours.