Applications Guide

CSC–2000 Series Pneumatic VAV Reset Volume Controllers 2 Applications Guide
Connections
General Information
CSC–2000 Series Overview
The CSC–2000s are dierential-pressure (∆P), sub-
master controllers with adjustable minimum and
maximum airow seings. A master controller,
typically a room thermostat, resets the CSC velocity
setpoint.
CSC–2000s are available as direct acting for normally
open VAV terminal units, and reverse acting for nor-
mal closed VAV terminal units. Each unit is equipped
with separate adjustment knobs for minimum and
maximum airow seings. CSC–2001/2002s are
equipped with 0–10 reference dials, while all others
have blind adjustments. Calibrate all models using
standard airow measuring equipment.
The spring range of the actuator does not maer
to the controller. However, sucient main air is
required to provide the actuator with enough force
to operate the damper/linkage.
Any sequencing with other controllers, valves, or
pneumatic-electric relays must be sequenced with
the controller’s reset range, not the actuator’s spring
range.
These controllers are typically used on single-duct
applications but may be found in dual-duct appli-
cations. When working on dual-duct applications
it may be necessary to work on one duct at a time
while closing o the other.
The CSC–2000 series controllers are position
sensitive. See the Mounting section for the proper
vertical/horizontal orientation for the dierent
models.
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.
Adjustments