NonStop NS1200 Planning Guide

the hardware installed in each cabinet. For air temperature levels at the site, refer to “Operating
Temperature, Humidity, and Altitude” (page 48).
Weight
Because modular cabinets for Integrity NonStop NS1200 servers house a unique combination of
enclosures, total weight must be calculated based on what is in the specific cabinet, as described
in “Modular Cabinet and Enclosure Weights With Worksheet ” (page 47).
Flooring
Integrity NonStop NS1200 servers can be installed either on the site’s floor with the cables entering
from above the equipment or on raised flooring with power and I/O cables entering from
underneath. Because cooling airflow through each enclosure in the modular cabinets is
front-to-back, raised flooring is not required for system cooling.
The site floor structure and any raised flooring (if used) must be able to support the total weight
of the installed computer system as well as the weight of the individual modular cabinets and
their enclosures as they are moved into position. To determine the total weight of each modular
cabinet with its installed enclosures, refer to “Modular Cabinet and Enclosure Weights With
Worksheet ” (page 47).
For your site’s floor system, consult with your HP site preparation specialist or an appropriate
floor system engineer. If raised flooring is to be used, the design of the Integrity NonStop NS1200
server modular cabinet is optimized for placement on 24-inch floor panels.
Dust and Pollution Control
Integrity NonStop NS1200 servers do not have air filters. Any computer equipment can be
adversely affected by dust and microscopic particles in the site environment. Airborne dust can
blanket electronic components on printed circuit boards, inhibiting cooling airflow and causing
premature failure from excess heat, humidity, or both. Metallically conductive particles can short
circuit electronic components. Tape drives and some other mechanical devices can experience
failures resulting from airborne abrasive particles.
For recommendations to keep the site as free of dust and pollution as possible, consult with your
heating, ventilation, and air conditioning (HVAC) engineer or your HP site preparation specialist.
Zinc Particulates
Over time, fine whiskers of pure metal can form on electroplated zinc, cadmium, or tin surfaces
such as aged raised flooring panels and supports. If these whiskers are disturbed, they can break
off and become airborne, possibly causing computer failures or operational interruptions. This
metallic particulate contamination is a relatively rare but possible threat. Kits are available to
test for metallic particulate contamination, or you can request that your site preparation specialist
or HVAC engineer test the site for contamination before installing any electronic equipment.
Space for Receiving and Unpacking the System
Identify areas that are large enough to receive and to unpack the system from its shipping cartons
and pallets. Be sure to allow adequate space to remove the system equipment from the shipping
34 Site Preparation Guidelines