UFC 4-133-01N
24 February 2005
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
attenuators for all supply ductwork. Consider more than one air
handler for large zones.
d. Provide two air handlers for the operations and electronic
equipment 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. See MIL-HDBK-1012/1, Electronic Facilities
Engineering.
2-3.4.2
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.
2-3.5
Electrical Requirements.
2-3.5.1
Uninterrupted Power Supply (UPS).
Provide non-redundant UPS with maintenance bypass switch in accordance with
Paragraph 3-5.2.3. Use anticipated load to determine the size of UPS. Use a
separate plumbing and electrical chase that extends from the ground floor to the
cable access level.
2-3.5.2
Emergency Electrical Power.
Provide an emergency generator with automatic starting and switching capability
as described in Paragraph 3-5.2. Provide emergency power to:
a. All loads as required by NFPA-101.
b. Electronic equipment in operations and with maintenance bypass
switch.
c.
Building mechanical systems supporting electronic equipment.
d. Exterior security lighting and security systems.
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