Applications Guide

CSC-3000 Series Pneumatic VAV Reset Volume Controllers 3 Applications Guide, Rev G
Connections
ForallmodelsoftheCSC-3000series,use1/4"(5
mm)O.D.“FR”tubingonthefollowingpush-on
ings:
1. Connecttheclean,dry,oil-freemainairsupplyto
Port“M”(15to30psi).
2. ConnectthedamperactuatortoPort“B.”
3. ConnectthethermostatoutputtoPort“T.”
4. Connectthehigh(“total”)pressuretaponthe
airowsensortoPort“H.”
5. Connectthelow(“static”)pressuretaponthe
airowsensortoPort“L.”
6. Checkforproperconnections.Make sure all
tubes are snug on their ings.Ifloose,trimthe
endofthetubingandreconnectittoensurethere
arenoleaks.
NOTE: Overtime,thetubemaystretchordevelop
microcracks.Trimtheendoftubeback
toundamagedmaterialandreconnect.
Replacethetubingifitisbrileor
discolored.
CAUTION
Pneumatic devices must be supplied with clean,
dry control air. Any other medium (e.g., oil or
moisture contamination) will cause the device
to fail.
NOTE: Youcaneasilytestforleakswithasqueeze
bulbtoensuretherearenoleaksatthe
actuatordiaphragmorings.
7. Useaowhoodor“tee”aMagnehelic
®
(or
equivalent)dierentialpressuregaugebetween
thecontrollerandthe∆Ppick-uptodetermine
airowrates.
Typical CSC-3011 Application and Connections
NOTE: TheseinstructionsdonotapplytotheCSC-
3014ortheCSC-3501/3505.
Magnehelic gauge and 0–30 psi
gauge in illustration added for
checkout and calibration purposes
CAUTION
To prevent damage to the gauge, do NOT
connect a Magnehelic gauge designed to
measure an air flow sensor’s differential
pressure (e.g., 0–0.5 wc) to the main air
pressure (approximately 20 psi or 554 wc)!