Specifications

ManualsBrandsColeman ManualsGrill3000 SERIES

CSC-3000 Series Pneumatic VAV Reset Volume Controllers 1 Applications Guide, Rev G

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 ......................................................................................................................................................6

Reset Span

...............................................................................................................................................................6

Troubleshooting

.............................................................................................................................................................7

Maintenance

..................................................................................................................................................................7

Important Notices

.........................................................................................................................................................7

Magnehelic Gauge to Airﬂow Rate Chart ......................................................................................................................8

Replacement Cross-References

......................................................................................................................................9

Applications ................................................................................................................ 10

Cooling ........................................................................................................................................................................10

Cooling with Heating Valve

.........................................................................................................................................11

Cooling with Heating P-E Switch

.................................................................................................................................12

Dual Duct ....................................................................................................................................................................13

Dual Duct, Constant Volume

.......................................................................................................................................14

Index ........................................................................................................................... 15

*NOTE: ThisApplicationGuidedoesnotapply

(completely)totheCSC-3014orthe

CSC-3501/3505.Seetheirseparatedata

sheetsandinstallationguides.

Pneumatic VAV Reset Volume Controllers

CSC-3000 Series*

Summary of content (15 pages)

PAGE 1
Pneumatic VAV Reset Volume Controllers CSC-3000 Series* Applications Guide *NOTE: This Application Guide does not apply (completely) to the CSC-3014 or the CSC-3501/3505. See their separate data sheets and installation guides. General Information...................................................................................................... 2 CSC-3000 Series Overview.......................................................................................................................................
PAGE 2
General Information CSC-3000 Series Overview Mounting These CSC-3000 series reset volume controllers are designed for use on heating or cooling systems with (normally open or normally closed) VAV terminal units and (direct or reverse acting) thermostats. The CSC-3000 Series are position sensitive. They must be mounted and calibrated in either the horizontal or vertical plane. 1.
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Connections For all models of the CSC-3000 series, use 1/4" (5 mm) O.D. “FR” tubing on the following push-on fittings: NOTE: 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 airflow sensor to Port “H.” 5. Connect the low (“static”) pressure tap on the airflow sensor to Port “L.” 6. Check for proper connections.
PAGE 4
Adjustments and Calibration NOTE: Do NOT adjust reset start point and reset span (upper and lower knobs) without thoroughly reviewing the relevant sections. DIRECT Reset Minimum and Maximum Reset Span (5 psig) Reset Start Point • 3 psig: CSC-3021/3026 • 8 psig: CSC-3011/3016/3017/3025 • 10 psig: CSC-3023 Damper Action The damper action is factory-set at Normally Open (N.O.). To change to Normally Closed (N.C.), perform the following steps: Min. Airflow NOTE: 1. Loosen the damper selection screw. 2.
PAGE 5
3a. Reconnect the thermostat tubing to the “T” port. 3b. Or reinstall the plug on the CSC-3000’s “G” port. (See Step 1b.) 4. Adjust thermostat to call for full airflow (15 psi or more at “T” port). 5. Adjust the HI STAT ∆P (dial on right) one adjustment (1/4 to 1/2 knob rotation) at a time until the desired Maximum airflow is read at the Magnehelic gauge and is stable. NOTE: NOTE: 3a. Reconnect the thermostat tubing to the “T” port. 3b. Or reinstall the plug on the CSC-3000’s “G” port. (See Step 1b.) 4.
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Reset Start Point Reset Span NOTE: In almost all applications, the reset span never needs adjusting. Do not change the default 5 psi unless really necessary. Old Reset Start Point (8 psig) Max. Airflow New Reset Start Point (3 psig) The reset span is the thermostat’s effective reset range for the controller. A reset span of 5 psi means that it will take a 5 psi pressure change measured from the reset start point to reset the flow rate of the VAV box. Min.
PAGE 7
Troubleshooting • Is the airflow pickup properly placed, and does it send a good differential pressure to the controller? (See Connections on page 3.) Is the airflow sensor dirty or defective? (Disconnect the sensor from the controller before attempting to blow the sensor clean!) • Are reset start and reset span set correctly? See Reset Start Point on page 6 and Reset Span on page 6. NOTE: The controller should be set according to the specifications found on the manufacturer’s label on the VAV box.
PAGE 8
Magnehelic Gauge to Airflow Rate Chart NOTE: This chart is for illustration only! Do not use this chart to obtain your values. It is NOT intended for calibration of your Minimum and Maximum adjustments. 1.0 .90 .80 .70 .60 .50 .40 .30 l l inc hO va va 20 inc hO hO l l va va inc 16 18 nd hO inc inc 12 14 hR hR inc 10 nc 8i ou ou nd ou nd hR ou hR nc hR nc 6i .10 .09 .08 .07 .06 .05 5i nc hR .15 ou ou nd nd .20 nd .25 4i Differential Pressure (∆P) in Inches w.c.
PAGE 9
Replacement Cross-References KMC CSC Cross-Reference to Universal CSC-3000 Series “Universal” Replacement KMC Model Older KMC Model CSC-3011 CSC-1001 CSC-2001 CSC-2003 CSC-2007 CSC-2011 (Discontinued ) CSC-2013 (Discontinued) CSC-3014 (Discontinued)* CSC-3017** CSC-3501 (Discontinued)*** CSC-3021 CSC-2002 CSC-2004 CSC-2008 CSC-2012 (Discontinued) CSC-2014 (Discontinued) CSC-3016 CSC-2009 CSC-2015 (Discontinued) CSC-2017 (Discontinued) CSC-3505 (Discontinued)*** CSC-3026 CSC-2010 CSC-2016 CSC-2018
PAGE 10
Applications Cooling DA Thermostat (NO or NC Damper) • LO STAT = Min. Flow • HI STAT = Max. Flow • Reset Range = 8 to 13 psi RA Thermostat (NO or NC Damper) • LO STAT = Max. Flow • HI STAT = Min. Flow • Reset Range = 3 to 8 psi (These instructions do not apply to the CSC-3014 or the CSC-3501/3505.
PAGE 11
Cooling with Heating Valve DA Thermostat, NO or NC Damper, and NO Hot Water Valve • Hot Water Valve = NO • Spring Range = 3 to 8 psi • LO STAT = Min. Flow • HI STAT = Max. Flow • Reset Range = 8 to 13 psi RA Thermostat, NO or NC Damper, and NC Hot Water Valve • Hot Water Valve = NC • Spring Range = 8 to 13 psi • LO STAT = Max. Flow • HI STAT = Min.
PAGE 12
Cooling with Heating P-E Switch DA Thermostat, NO or NC Damper, and NC Heating P-E Switch • Stage 3 On with Decrease • Stage 2 On with Decrease • Stage 3 Off with Increase • Stage 1 On with Decrease • Stage 2 Off with Increase • Stage 1 Off with Increase NC PE Switches • LO STAT = Min. Flow • HI STAT = Max.
PAGE 13
Dual Duct Cold Deck CSC-3011-10 • • • • Damper = NC LO STAT = Min. Flow HI STAT = Max. Flow Reset = 8 to 13 psi Hot Deck CSC-3021-10* • • • • Damper = NO LO STAT = Max. Flow HI STAT = Min. Flow Reset = 3 to 8 psi *Or use a CSC-3011-10 and change the reset from 8 to 3. See Reset Start Point on page 6.
PAGE 14
Dual Duct, Constant Volume Cold Deck/Common Discharge CSC-3011-10 • Damper = NC • LO STAT = Constant Volume Flow • Reset = 8 to 13 psi Hot Deck CSC-3011-10 • • • • Damper = NO LO STAT = Min. Flow HI STAT = Max.
PAGE 15
Index A H Adjustments 4 Airflow Rate Chart 8 Applications 10 HI STAT 5, 6 Hot Deck 13, 14 I C Important Notices 7 Calibration 4 Cold Deck 13, 14 Common Discharge 14 Connections 3 Cooling 10 Cooling with Heating P-E Switch 12 Cooling with Heating Valve 11 Cross-References 9 CSC-3011 9, 13, 14 CSC-3014 2 CSC-3016 9 CSC-3021 9, 13 CSC-3025 9 CSC-3026 9 CSC-3501/3505 2 L LO STAT 4, 5, 6 M Magnehelic Gauge 8 Maintenance 7 Minimums and Maximums 4 Mounting 2 O Overview 2 R Replacement Cross-References 9