KMC Controls CSC-3000 Series - Manual (Page 2)

CSC-3000 Series 2 Installation Guide
NOTE: The reverse reset illustration above assumes no
relays between the thermostat and “T” port.
For Reverse Reset (RA thermostat for cooling or DA
thermostat for heating), perform the following steps:
1. Disconnect the “T” port and leave it open. Temporarily
plug the open tubing.
2. Adjust the LO STAT ∆P (center dial) to the desired
Maximum airflow.
3. Reconnect the tubing at port “T”.
4. Adjust the thermostat to call for minimum airflow (15
psi or more at “T” port).
5. Adjust the HI STAT ∆P (dial on the right) to the
desired Minimum airflow.
6. Repeat Steps 1 through 5 to verify the settings.
DIRECT Reset Minimum and Maximum
NOTE: The direct reset illustration above assumes no
relays between the thermostat and “T” port.
For Direct Reset (DA thermostat for cooling or RA
thermostat for heating), perform the following steps:
1. Disconnect the “T” port. Temporarily plug the tubing.
(Do NOT plug the port.)
2. Adjust the LO STAT ∆P (center dial) to the desired
Minimum airflow.
3. Reconnect the tubing at “T” port.
4. Adjust thermostat to call for full airflow (15 psi or
more at “T” port).
5. Adjust the HI STAT ∆P (dial on right) to the desired
Maximum airflow.
6. Repeat Steps 1 through 5 to verify the settings.
More Information
For specifications, see the Data Sheet for
these controllers. For additional adjust-
ments, calibration, troubleshooting,
principles of operation, and sample ap-
plications, see the Application Guide for
these controllers. For support documents,
see the CSC-3000 series product page (bit.ly/y0G2sI) on
the KMC Controls web site (kmccontrols.com) .
This Installation Guide does not apply to the CSC-3014
(designed to work with CTC-2100 Thermostats) or the
CSC-3501/3505 (Linear Volume Reset Controllers). See
their separate Data Sheets and Installation Guides.
KMC Controls, Inc.
19476 Industrial Drive
New Paris, IN 46553
574.831.5250
www.kmccontrols.com; [email protected]
Important Notices
The material in this document is for information purposes
only. The contents and the product it describes are subject to
change without notice. KMC Controls, Inc. makes no represen-
tations or warranties with respect to this document. In no event
shall KMC Controls, Inc. be liable for any damages, direct or
incidental, arising out of or related to the use of this document.
© 2012 KMC Controls, Inc. 213-019-01M
REVERSE Reset Minimum and Maximum Adjustments and Calibration
NOTE: Do NOT adjust start point and span (upper and
lower knobs) without thoroughly reviewing the
Application Guide. For information about direct
vs. reverse reset, see the Application Guide.
Damper Action
The damper action is factory-set at Normally Open (NO).
To change to Normally Closed (NC):
1. Loosen the damper selection screw.
2. Turn the selection dial clockwise until the “NC” arrow
aligns with the “DAMPER” arrow.
NOTE: Accuracy in the alignment of the arrows is
very important. Make this adjustment as exact
as possible.
3. Tighten the selection screw. Be sure the screw is tight
(2 to 4 in-lbs. of torque), but if overtightened, the
plastic will strip out.
Adjusting Minimums and Maximums
When adjusting the minimum and maximum flow
settings, the output responds slowly to changes in the
setpoint. Wait for the flow rate to stabilize after making
an adjustment (usually 20 to 30 seconds) before making
further adjustments. Also, if the damper position is all
the way closed or open when starting this step, turn the
adjustment one full turn, and then wait 20 to 30 seconds
for a change in the flow reading of the Magnehelic gauge.
If no change occurs after this time, repeat until the flow
rate changes. (See the Application Guide for more tips.)
Thermostat Pressure
Max. Airflow
Min. Airflow
Reset Start Point
• 3 psig: CSC-3021/3026
• 8 psig: CSC-3011/3016/3017/3025
• 10 psig: CSC-3023
Reset Span (5 psig)
(Cooling w/ DA Thermstat or
Heating w/ RA Thermostat)
Thermostat Pressure
Max. Airflow
Min. Airflow
Reset Start Point
• 3 psig: CSC-3021/3026
• 8 psig: CSC-3011/3016/3017/3025
• 10 psig: CSC-3023
Reset Span (5 psig)
(Cooling w/ RA Thermstat or
Heating w/ DA Thermostat)