7
®
Packaged Rooftop Air Conditioner
STULZ CyberPack Series
42 - 105 kW
Packaged Rooftop Air Conditioner
SUMMARY
This specifi cation describes requirements for a precision
environmental control system. The CyberPack shall provide
precision temperature and/or humidity control for computer
rooms or rooms containing telecommunications or other
highly-sensitive heat load equipment where continuous
24 hour a day, 365 days a year air conditioning is required.
CyberPack systems free up fl oor space. The units are designed
with a wide range of options to handle both precision and
comfort cooling applications.
DESIGN REQUIREMENTS
The environmental control system shall be a CyberPack
factory-assembled unit. The unit shall be designed for rooftop
installation, requiring access through hinged or removable
access panels.
Each system shall be capable of handling ___CFM. The unit
shall have a total cooling capacity of ___kW/MBH, and a
sensible cooling capacity of ___kW/MBH based on entering
air conditions of ___°F dry bulb and ___°F wet bulb. The
main fan motors shall be ___HP. The unit shall have a power
supply of ___volts___/phase/___frequency.
QUALITY ASSURANCE
The manufacturer shall maintain a set of international
standards of quality management to ensure product quality.
Prior to shipment, each system shall be subject to complete
operational and functional testing based on predefi ned
procedures. The air conditioner manufacturer shall be ISO
9001 certifi ed. The air conditioner manufacturer shall have
a minimum of 20 years of experience in the design and
fabrication of similar equipment.
CABINET
The CyberPack unit cabinet shall be constructed of formed
5052 grade aluminum for corrosion protection. The cabinet
shall be of formed sections, welded, and ground smooth.
The exterior shall be fi nished with a weather and UV resistant
coating. Unit air leakage shall be less than 1% of design
airfl ow rate measured at rated unit static pressure.
The cabinet interior shall be insulated with 1” thick closed
cell elastomeric insulation providing a minimum R-value of
4.2. This thickness provides greater insulation value than
lesser insulations which results in less energy lost through
the cabinet. As opposed to fi berglass insulation with facing
that can easily tear, there are no glass fi bers which can enter
the airstream.
Air Filtration
All units shall be supplied with disposable air fi lters classifi ed
as UL 900 or UL 586. Filters shall be 4” deep (nominal).
Filters shall be pleated with a Minimum Effi ciency Reporting
Value (MERV) of 8. Filters shall be accessible through the
front of the unit.
Optional: Filters rated up to MERV 14 shall be available.
MECHANICAL COMPONENTS
Supply Fans
The blower(s) shall be direct driven, single inlet, backward
curved centrifugal fan with an electronically commutated
motor for maintenance free operation. The motor shall
include: Integrated electronic control board and direct
microprocessor control signaling for fan speed control,
soft-starting capabilities, and integrated current limitations.
Each fan shall be low noise and low vibration and have an
anti-corrosive aluminum impeller. Each fan impeller shall be
dynamically and statically balanced in two planes to minimize
vibration during operation.
Pr
oduct Guide Specifi
cations
