Unpack and Acclimate the SL150 Librar y
Planning and Preparation 2-3
The HACS is configured so that large air handling equipment provides a designed
introduction of positively pressurized cold air to the front of the equipment. The
positive cold air is designed to work in conjunction with a corresponding amount of
exhaust air out the back of the installed equipment. The air handlers must be capable
of supplying enough air to create positive pressure in the cold aisle to all equipment
installed. In the event cold air supply is inadequate to support all of the equipment,
recirculation of hot aisle air into the cold aisle may occur. In this type of environment,
the objective for systems operations is to maintain, and adjust as necessary, to ensure
adequate air flow from cold to hot aisle to permit proper system cooling.
The contained hot aisle is designed to provide a barrier between the cold supply aisle
and the hot exhaust aisle. As a result of this hot aisle containment, an air pressure
differential may exist between the cold and hot aisles. It is preferred the pressure
differential to be neutral to negative pressure in the hot aisle.
The contained hot aisle air pressure will fluctuate due to both static and dynamic
pressure variation sources. Static pressure variation sources are typically related to the
facilities handling equipment, dampeners, control systems, and so forth. Dynamic
pressure variation sources are more local to the installed equipment such as is
contained within the hot aisle. Examples of dynamic sources include but are not
limited to nearby equipment exhaust fans and air exhaust deflectors on doors, both of
which may cause turbulent air to be directed at the installed equipment. The turbulent
air may impede the exhaust air of the equipment in question thereby reducing the
cooling capability of the cold aisle supply air.
Stage the SL150 Library
To stage the library:
1. Clear access to the shipping carton.
You might need to remove plastic wrap and cut shipping straps.
2. Transport the packaged unit to the staging area.
The shipping carton of the base module is secured to a pallet. Use a pallet jack to
transport the base module.
Unpack and Acclimate the SL150 Library
To unpack and acclimate the library, perform the following tasks.
Task 1 Unpack the Library Module
1. Open the carton.
Note: In the event a neutral to negative hot aisle pressure differential
is not achievable, ensure that minimal measures are taken such as
installing rack doors on contributing or affected racks. If initial
mitigating efforts are ineffective to reduce air impediment, a
supplemental air removal unit may be required to boost airflow
through the equipment
Warning: An unpacked base module (Module 1) containing one
tape drive and one power supply weighs approximately 21.5 kg
(47 pounds).
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