KMC Controls CSC-3000 Series Application Manual
Pneumatic vav reset volume controllers
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- Application manual (3 pages) ,
- Application manual (15 pages)
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*(These instructions do not apply to the
CSC-3014 or the CSC-3501/3505.)
Applications Guide
General Information ..................................................................................................... 2
CSC-3000 Series Overview ............................................................................................................................................ 2
Mounting ....................................................................................................................................................................... 2
More Information .......................................................................................................................................................... 2
Connections .................................................................................................................................................................. 3
Adjustments and Calibration ......................................................................................................................................... 4
Damper Action ........................................................................................................................................................ 4
Determining the Type of Reset ................................................................................................................................ 4
Adjusting Minimums and Maximums ...................................................................................................................... 4
DIRECT RESET Minimum and Maximum ................................................................................................................. 4
REVERSE RESET Minimum and Maximum ............................................................................................................... 5
Reset Start Point ...................................................................................................................................................... 5
Reset Span ............................................................................................................................................................... 6
Troubleshooting ............................................................................................................................................................. 6
Maintenance .................................................................................................................................................................. 6
Pressure Independent Operation Principles ................................................................................................................... 7
Magnehelic Gauge to Airflow Rate Chart ...................................................................................................................... 8
Applications .................................................................................................................. 9
Cooling .......................................................................................................................................................................... 9
Cooling with Heating Valve ......................................................................................................................................... 10
Cooling with Heating P. E. ........................................................................................................................................... 11
Dual Duct .................................................................................................................................................................... 12
Dual Duct, Constant Volume ....................................................................................................................................... 13
CSC-3000 Series Pneumatic VAV Reset Volume Controllers
Pneumatic VAV Reset Volume Controllers
CSC-3000 Series*
Applications Guide
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Summary of Contents for KMC Controls CSC-3000 Series
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Page 1: Table Of Contents
Magnehelic Gauge to Airflow Rate Chart ........................8 Applications ........................9 Cooling ..................................9 Cooling with Heating Valve ............................10 Cooling with Heating P. E............................11 Dual Duct ..................................12 Dual Duct, Constant Volume ............................13 CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 2: General Information
The universal design of the CSC-3000 series is More Information intended for new or replacement applications that call for direct or reverse acting reset on normally For additional specifications, see the Data Sheet for open or normally closed VAV terminal units. these controllers. NOTE: These controllers are used on single and This Application Guide does not apply (completely) dual duct applications. When working on to the CSC-3014 (designed to work with CTC-2100 dual duct applications, it may be necessary Thermostats) or the CSC-3501/3505 (Linear Volume to work on one duct at a time. Reset Controllers). See their separate Data Sheets and Installation Guides. NOTE: Any sequencing with other controllers, valves, or pneumatic-electric relays must be done with the controller’s reset range, NOT the actuator’s spring range. All dimensions are in inches (mm). CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 3: Connections
(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. Typical CSC-3011 Application and Connections CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 4: Adjustments And Calibration
Magnehilic gauge and is stable. Min. Airflow 6. Repeat Steps 2 through 5 to verify the settings to 8 psig 13 psig 3 psig be correct and fine tune if necessary. Thermostat Pressure CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 5: Reverse Reset Minimum And Maximum
Reset Start Point The reset start point is the pressure from the Reset Span (5 psig) Max. Airflow thermostat at which the controller begins to reset from the LO STAT to the HI STAT setting. Models of the CSC-3000 series come with reset Reset Start Point (3 psig) start points factory-set at 3, 8, or 10 psig. (See the Min. Airflow chart on the next page.) These are standard in most applications and typically do not require adjustment. 8 psig... -
Page 6: Reset Span
Troubleshooting Reset Span The CSC-3000 series are position sensitive. Be sure to mount the controller with the correct orienta- The reset span is the thermostat’s effective reset tion. See the Mounting section. If the controller is range for the controller. A reset span of 5 psig means calibrated in a position other than the final mounting... -
Page 7: Pressure Independent Operation Principles
Turning the LO STAT ∆P knob counterclockwise (to increase) repositions the reset lever away from the Turning the HI STAT ∆P knob counterclockwise (to increase) repositions the fulcrum towards the normally open nozzle and towards the normally closed nozzle. LO STAT ∆P adjustments must be nozzles. HI STAT ∆P adjustments must be done with done with the “T” port pressure being less than the the “T“ port pressure being greater than the RESET RESET START pressure. START pressure plus the RESET SPAN pressure. (These instructions do not apply to the CSC-3014 or the CSC-3501/3505.) CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 8: Magnehelic Gauge To Airflow Rate Chart
150 200 300 400 1000 1500 2000 3000 4000 6000 8000 CFM Flow Rate as read by sensor VAV Airflow Rate by Duct Size CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 9: Applications
• LO STAT = Max. Flow • HI STAT = Min. Flow (These instructions do not apply to the • Reset Range = 3 to 8 psig CSC-3014 or the CSC-3501/3505.) CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 10: Cooling With Heating Valve
Hot Water Valve = NC • Spring Range = 8 to 13 psig • LO STAT = Max. Flow • HI STAT = Min. Flow • Reset Range = 3 to 8 psig CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 11: Cooling With Heating P. E
Stage 2 Off with Increase • Stage 1 Off with Increase • LO STAT = Max. Flow • HI STAT = Min. Flow NO PE • Reset Range = 3 to 8 psig Switches CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 12: Dual Duct
Reset = 8 to 13 psi Hot Deck CSC-3011-10 • Damper = NO • LO STAT = Max. Flow • HI STAT = Min. Flow • Reset = 3 to 8 psi CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide... -
Page 13: Dual Duct, Constant Volume
LO STAT = Min. Flow • HI STAT = Max. Flow • Reset = 13 to 8 psi KMC Controls, Inc. 19476 Industrial Drive New Paris, IN 46553 574.831.5250 www.kmccontrols.com info@kmccontrols.com CSC-3000 Series Pneumatic VAV Reset Volume Controllers Applications Guide © 00 KMC Controls, Inc. AN-0B-RevA...
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