Vertiv | Liebert PEX+ Chilled Water | User Manual 17
Installation
• The equipment room should have suitable and eective heat insulation.
• The equipment room should have a sealed and damp-proof layer. Polyethylene film should be used for the
damp proof layer of the ceiling and walls. Alternatively, moisture-proof paint can be used to simulate the same
eect akin to Polyethylene. It is important to ensure that the coating on the concrete wall and floor is damp-
proof.
• Outdoor air significantly increases the load of heating, cooling, humidification, and dehumidification.
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 infiltration of the
outdoor air below 5% of the total indoor airflow. 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 defined as per the requirements. However, if these
requirements are not met, Vertiv suggests that rectifications to be made on the site in order to comply with
the specified requirements and conditions.
• However, if the rectifications or modifications 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 floor of equipment room or computer room and the outdoor unit must be installed outside
data center, open to the 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 airflow, shorten the
cooling cycle and result in air return short cycle and air noise.
• Avoid locating multiple indoor units close to each other. This can result in short cycle of air and create
load imbalance.
• Do not install the unit within the vicinity of any other precision cooling equipment to prevent 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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