Site Preparation
7705 SAR-M Chassis Installation Guide 79
Installation Locations
The 7705 SAR-M, 7705 SAR-8, and 7705 SAR-F are intended to be installed at cell sites or
other facilities that provide weather protection and an extended temperature-controlled
environment. The 7705 SAR-M, 7705 SAR-8, and 7705 SAR-F are not intended for
installation outdoors.
The 7705 SAR-M, 7705 SAR-8, and 7705 SAR-F chassis are designed to work in an
environment equivalent to a modern office building, where protection is provided from
contaminants including mold growth, precipitation, volatile or corrosive chemicals,
hygroscopic dust, insects, pests, or vermin entering the product.
When a 7705 SAR-M, 7705 SAR-8, or 7705 SAR-F is installed in an outside plant, such as
a cell site, hut, cabinet, or outside plant enclosure, it must be installed in an environment
where, except during installation and servicing, the compartment is sealed or properly
filtered.
The product must be protected from ingress of contaminants such as outside air, conductive
pollution, volatile or corrosive elements (for example, salt-laden air), hygroscopic dust,
insects, pests, or vermin.
The humidity levels in the cabinet must be controlled to ensure a relative humidity level
between 5% and 85% (non-condensing) with short-term levels to 95% (non-condensing).
(Short-term is a period of less than 96 consecutive hours and a total of no more than 15 days
per year. This is equivalent to 360 hours per year, with short-term periods occurring no more
than 15 times per year.) The dew point threshold in the cabinet must not be crossed.
Protection is typically achieved by deploying the product in a cabinet that is sealed and is
provided either with air-to-air heat exchangers or with air-conditioning and/or heaters as
required for the local climate. If the cabinet is the type that allows outside air to ventilate the
cabinet, it must have Hydrophobic Membrane filters, at the air inlet and air exit, with all other
parts properly sealed against outside contaminants and moisture.
Warning:
• The 7705 SAR-M, 7705 SAR-8, or 7705 SAR-F must not be installed in the same
compartment as the batteries, which can give off gas. Out-gassing from batteries not
only could have corrosive effects, but could also result in an explosion. If batteries are
located in the same cabinet, the battery compartment must be completely sealed off
from all other equipment and must be properly ventilated for safety as required by
product safety standards and local codes and statutes.
• Follow the equipment rack manufacturer’s instructions for proper rack installation.
Failure to comply with the requirements and the location requirements outlined in this
section and Chassis Location Requirements may impede proper airflow and may result
in the system overheating.
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