Vertiv | Liebert PEX4 | User Manual 17
Installation
• Outdoor air signicantly increases the load of heating, cooling, humidication, and dehumidication.
Therefore, all the doors and windows must be closed. Gaps and seams must be very narrow to prevent
the outdoor air from entering the equipment room. It is an industry best practice to keep the inltration of
the outdoor air below 5% of the total indoor airow. Apply appropriate thermal insulation and antifreeze
measures for outdoor water pipes to avoid poor drainage and insuicient water supply caused by freezing.
• Vertiv recommends that the site preparation is dened as per the requirements. However, if these require-
ments are not met, Vertiv recommends that rectications to be made on the site in order to comply with
the specied requirements and conditions.
• However, if the rectications or modications are not implemented, then Vertiv does not guarantee the
accuracy and precision of the temperature and humidity provided by the unit.
2.2.2. Installation Space Requirements
Adequate installation space for the indoor unit must be provided. The indoor unit of the air-cooled product
must be installed on the oor of equipment room or computer Room and the outdoor unit must be installed at
outside of data center, open to external ambient.
• Do not use the indoor unit in the open and severe outdoor environment.
• Avoid locating the indoor unit in concave or narrow areas, which can obstruct the airow, shorten the
cooling cycle and result in air return short cycle and air noise.
• Avoid locating multiple indoor units close to each other that can result in short cycle of air and creating
load imbalance.
• Do not install the unit within the vicinity of any other precision cooling equipment to avoid the leakage
of condensed water produced due to imbalance load condition.
• Do not install other devices (such as smoke detector) over the indoor cabinet.
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