Researching the requirements 13
Lighting
-
Lighting illumination of 50-75 footcandles measured 30 inches (76 cm)
above the equipment room floor is recommended. Lighting must not be
powered from the equipment room power panel. For large system
installations, provisions for emergency lighting in the equipment room
should be considered. Direct sunlight in the equipment room should be
avoided to prevent the malfunctioning of devices which employ light
sensors (magnetic tape and disk units).
Earthquake bracing
In some equipment room environments, the need for earthquake bracing
should be considered or may be required. See the
System installation
procedures
(553-3001-210) for detailed instructions on how to install
proper earthquake bracing.
Structural
Floors should either be sealed concrete, vinyl, or mastic tile and should
meet floor loading requirements: avoid using sprayed ceilings or walls.
Air conditioning requirements
The air conditioning provided must be capable of handling
the heat
produced by the SL-1 system, as well as the additional heat produced by
equipment room personnel, lighting, and the heat input of external walls,
windows,
flmrs
and ceilings enclosing the room. A stable ambient
operating temperature of approximately 22’ C (72” F) is generally
recommended. The temperature differential in the equipment room should
not exceed k3.0’ C
(&
5’ F).
Note:
For systems using reserve power batteries, consult the
manufacturer’s specifications for recommended operating temperatures.
Heat dissipation of a system is estimated in BTU/l-u. The amount of air
conditioning required can be estimated at a rate of one U.S. ton of
refrigeration for every 12,000 BTU/hr of heat generated by the equipment
and equipment room personnel, plus one ton for each 500 square feet of
floor space. Each person in the equipment room generates 600 BTU/hr.
Installation planning 553-3001-120