230923S01 Direct-Digital Control System for HVAC
Building temperature control shall be accomplished by using DDC Technologies. User interface shall be
accomplished through a central host system that integrates the different control systems using standards
set by BACNET.
The graphical user interface must be designed for use on standard Intel Pentium workstations and
servers running Windows ’95 or Windows NT software.
Communications for the central host system shall be accomplished via the University’s Ethernet system
using IEEE802.3 standards.
The following chart describes how each monitored point, if required by the project, is to report back to the
central network.
DDC Point Definitions Specifications
Generator Monitoring
Description
Alarm
Display Adjust
Output Voltage
Load Current
Output Frequency
Oil Pressure
Fuel Pressure
Coolant Temperature
Engine RPM
Overspeed X
Overcrank X
High Temperature X
Oil Pressure Low X
X (out of
Mode Control Switch
AUTO)
Automatic Transfer Switch
X
X
X
X
X
X
X
Description
Display Adjust
Alarm
Override
Override
X (when
in
X
Switch Position
emergen
cy)
230923S01 - Direct-Digital Control System for HVAC
Dated: 12/2015
Applies to: All Projects
University of Kentucky
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230923S01 Direct-Digital Control System for HVAC
Main Power Feed
Description
Alarm
Input Voltage
Display Adjust
Override
X (upon
X
loss)
AHU'S
Description
Alarm
X
X
Override
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Display Adjust
STS - Status X
MAT - Mixed Air Temp. X
RAT - Return Air Temp.
SP - Static Pressure
EAT - Exhaust Air Temp.
CWST - Chill H2O Supply
Temp
CWRT - Chill H2O Return
Temp.
CWSP - Chill H2O Supply
Pressure
CWRP - Chill H2O Return
Pressure
RH - Relative Humidity
SCFM - Supply CFM
DAT - Discharge Air Temp. X
DATSP - Discharge Air Temp
Setpoint
Steam Pressure X
Chilled Water Temp. X
Chilled Water Pumps X
Condensate Pumps X
Reheat Pumps X
Global
X
X
X
X
X
Description
Display Adjust
Alarm
X
X
X
Override
X
X
OAT - Outside Air Temp.
RH - Relative Humidity
All Rooms
Description
X
Alarm
ZT - Zone Temp.
RH - Relative Humidity
Special Rooms: i.e. film
X
processing
Special Equipment: i.e. ultraX
low freezers
ZT-Setpoint
Rooms With VAV's
230923S01 - Direct-Digital Control System for HVAC
Dated: 12/2015
Applies to: All Projects
University of Kentucky
Display Adjust
Override
X
X
X
X
X
X
X
X
X
X
X
X
X
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230923S01 Direct-Digital Control System for HVAC
Description
Alarm
DAT - Discharge Air Temp.
ZTS - Zone Temp. Setpoint
(local)
ZTS - Zone Temp. Setpoint
(remote)
RHS - Relative Humidity
Supply
SCFM - Supply CFM
SCFM - Supply CFM (min.)
Setpoint
SCFM - Supply CFM (max)
Setpoint
Rooms With Hood Exhaust
Description
X
X
Override
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Display Adjust
X
Alarm
SCFM - Supply CFM
ECFM - Exhaust CFM
HECFM - Hood Exhaust CFM
SASHP - Sash Position
RVP - Reheat Valve Position
DP - Damper Position
HFV - Hood Face Velocity X
ECFMN - Exhaust CFM(min)
Set point
ECFMN - Exhaust CFM(max)
Set point
TECFM - Total Exhaust CFM
SECFM - Supply Exhaust
CFM differential
Display Adjust
Override
X
X
X
X
X
X
X
X
X
X
X
Monitoring System Specifications:
All jobs where monitoring systems are required shall implement the standard graphic screen layout
templates supplied by UK representative or follow the intent of the graphic’s descriptions outlined in this
specification with approval by UK representative .
All projects shall include the following types of dynamic screens:
1. Outside building graphic, if not already developed, including navigation bar.
2. Floor plans for each floor. Room numbers may or may not be required on these graphics per UK
representative . Partial floor plans for each floor to include room numbers for navigation
purposes.
3. Room graphics to include representation of all temperature control devices.
4. System graphics representing relevant monitored systems.
5. Upon highlighting a specific room, the controlling AHU button should be simultaneously
highlighted.
Modifications affecting any existing graphics accuracy in representation, including navigation bars, must
be pre-approved by UK representative.
230923S01 - Direct-Digital Control System for HVAC
Dated: 12/2015
Applies to: All Projects
University of Kentucky
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230923S01 Direct-Digital Control System for HVAC
Navigation Bar:
Location:
 Top 10-15% of graphic screen.
 (Fine grid x by x)
Content:
 Campus Button: Top left button on navigation bar. (Border area specified in setup of this first
button, dark gray background for whole navigation bar. This button must be placed first with
remaining buttons positioned relative to this one).
 Building Button: Immediate right of campus button.
 Floor Buttons: Placed horizontally in ascending order.
 AHU Buttons: Placed horizontally in ascending order.
 Equipment, System or Specialized Button: Application dependent.
 Zone Buttons: Links to partial floor plans designated "N"-North, "S"- South, "E"- East, "W"- West.
NOTE: Button sizes should be standardized four grid points high and standardized in width. With one grid
spacing between each button. Size and font will be Ariel 8pt.
Application:
 All monitor screens pertaining to building.
Representation:
 Table templates, or equivalent in color, font, size, and texture, shall be used. Floor button,
equipment label button, or any button located on navigation bar indicating current dynamic
graphic monitor screen shall be highlighted in red text to indicate current graphic in the navigation
menu.
230923S01 - Direct-Digital Control System for HVAC
Dated: 12/2015
Applies to: All Projects
University of Kentucky
4 of 5
230923S01 Direct-Digital Control System for HVAC
Setpoint / Control Field:
Location:
 Bottom 20-30% of screen.
 (Fine grid A x B)
Content:
 All adjustable control setpoints as referenced under required DDC point definitions specifications.
Application:
 All graphics pertaining to the representation of building equipment, systems, and temperature
controls including but not limited to AHU, mechanical room, and individual room screens.
Representation:
Table templates found in Signal\Monitor\Sample\ shall be utilized or equivalent in color, texture,
size, and font. Setpoints shall have gray background and black lettering with sunken texture.
Dynamic Field:
Location:
Below the navigation bar and above the setpoint/control field. This should comprise greater than
55% of the total screen area.
Content:
Representation of all equipment components comprising the equipment that the graphic was
designed to represent with dynamic fields indicating current status on all values defined under
DDC control point definition
specifications. Label of monitor screen to be located in bottom right of screen and be of same
color, size, texture, and font as defined in project.
Application:
All graphics pertaining to the representation of building equipment, systems, and temperature
controls including but not limited to AHU, mechanical room, and individual room screens.
Representation:
Graphics can be the design of the contractor or used from the template database if approved by
UK. All graphics must be reviewed and consensual agreement of their use must be reached
before point linking is performed. Dynamic fields must have a black background and have
standard dimensions with respect to other dynamic fields on same screen. All lettering must be
green to remain consistent with UK graphics specifications when showing an actual current status
of above defined points.
Communications Server Requirements:
To be determined on a per-project basis. Communications equipment will be compatible with currently
used operating systems.
230923S01 - Direct-Digital Control System for HVAC
Dated: 12/2015
Applies to: All Projects
University of Kentucky
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