MIL-HDBK-1024/1
6.3.4.1
Provide the following:
a) Two parallel piped air cooled chillers, each designed for 60
percent of the total building cooling load. Alternate operation of chillers
automatically on a regular basis when load is less than 60 percent. Consider
cold storage to minimize power peaks.
b) One chilled water circulation pump for each chiller plus a
manifold spare pump. Design chiller circuitry so that the pump shall operate
and water flow before the chiller is energized. The spare pump may be
manually operated. Provide secondary chilled water loops with three-way
valves at coils in each circuit to result in constant flow through chiller.
c) Divide the building into three cooling zones: administrative
areas, operations areas, and the equipment areas. Provide separate air
handlers and ducting systems for each zone. Provide sound attenuaters for
supply duct work. Consider more than one air handler for large zones.
d) Provide two air handlers for the operations, the NTDS/ACDS, and
terminal distribution rooms. Design the air handler controls to regulate the
units as primary and secondary with each unit alternating as the primary.
Provide air handlers capable of controlling humidity, equipped with electric
heat, and specifically designed for computer room applications. Refer to
MIL-HDBK-1012/1.
6.3.4.2
Heating. Provide fuel oil or gas operated boiler heating system
designed to accommodate the largest heating load anticipated. Provide two
circulation pumps, each designed for 100 percent of the total building heating
load. Design the pump controls to regulate the pumps as primary and secondary
with each pump alternating as the primary.
6.3.5
Electrical Requirements
6.3.5.1
Uninterrupted Power Supply (UPS). Provide non-redundant UPS in
accordance with par. 2.5.8. Use anticipated load to determine the size of
UPS.
6.3.5.2
Emergency Electrical Power. Provide an emergency generator with
automatic starting and switching capability as described in par. 2.5.7.
Provide emergency power to the following:
a)
Loads as required by NFPA-101.
b)
Electronic equipment in operations, the NTDS/ACDS, and equipment
rooms.
c)
Building mechanical systems supporting electronic equipment.
d)
Exterior security lighting and security systems.
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