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USACE / NAVFAC / AFCESA
UFGS-15910N (August 2003)
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Preparing Activity: NAVFAC
Superseding
UFGS-15910N (September 2001)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated 23 June 2005
Revised throughout - changes not indicated by CHG tags
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SECTION 15910N
DIRECT DIGITAL CONTROL SYSTEMS
08/03
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NOTE: This guide specification covers the
requirements for direct digital control (DDC) of
heating, ventilating, and air conditioning (HVAC)
systems.
Comments and suggestions on this guide specification
are welcome and should be directed to the technical
proponent of the specification. A listing of
technical proponents, including their organization
designation and telephone number, is on the Internet.
Recommended changes to a UFGS should be submitted as
a Criteria Change Request (CCR).
Use of electronic communication is encouraged.
Brackets are used in the text to indicate designer
choices or locations where text must be supplied by
the designer.
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NOTE: The intent of this specification is to
provide a multi loop, stand-alone, and distributed
digital control system as manufactured by companies
in the HVAC control field. This control system
provides for all HVAC control functions. Analog and
digital (binary, on/off, open/close) control signals
are input to microprocessor based digital
controllers. The digital controllers perform the
control logic and output analog and digital signals
to the HVAC equipment.
This control system will have interface ports to
allow connection to a terminal, portable computer,
and a central site computer. The interface
equipment will not provide day to day control of the
HVAC system, but it will allow the operator to
enable and disable equipment, change setpoints,
SECTION 15910N
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