APC UCCS Temperature Control - Manual (Page 34)

JANUARY 2008 UCCS STANDARDS 15950-34
1. Not allowed.
D. Standard Nomenclature for Valve and Damper Position Description:
1. Set up the conversion table for each valve or damper control output so that 100%
OPEN = open and 0% OPEN = closed.
2. For mixed-air dampers, 100% OPEN = fully open outside air damper and closed
return damper.
3. For face and bypass dampers, 100% OPEN = face damper fully open and bypass
damper closed. This would apply to both a face and bypass damper for a heating coil,
which is normally open to the coil; and to a face and bypass damper for a evaporative
cooling pad, which is normally closed to the pad.
E. Setup of Setpoints
1. The Setpoint Box in the CX and Cyberstation software shall be checked for all
numerical points to be used as setpoints or any type of constant value point.
F. Setup of Inputs
1. THRESHOLDS:. The threshold shall be filled-in with the following value. Where
a particular application is not listed, enter a reasonable value based on the
application.
Temperature (Space, OAT, MAT, DAT, RAT, etc.) .1F
Space Static Pressure 0.01”W.C.
Duct Static Pressure 0.2W.C.
Relative Humidity (Space, OAT, MAT, DAT, RAT, etc.) 1%
G. Provide thermal-conducting compound for all sensors in thermowells.
H. Protect all points where pneumatic tubing or sensing elements come in contact with metallic
surfaces by enclosing the tubing or sensor with a section of poly-tubing. This applies at
such locations as duct penetrations, points where tubing is attached to ductwork, points
where sensing elements come into contact with or are attached to coil frames, etc.
I. Seal all penetrations into ductwork or air-handling units with duct sealant or other means to
make the installation airtight.
J. Mount all control valves so that the stem is vertical. Prior approval is required from the
UCCS HVAC Shop for all installations where this cannot be achieved.
K Averaging-type sensing elements shall be firmly supported in ductwork or air-handling
units using 1/2" EMT or other auxiliary support.