KMC Controls CSP-4702 User Manual

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Mounting

1.563 (39.7)

Analog Differential-Pressure VAV Controller/Actuator

CSP-4702

Installation Guide

Gear

Adjustable Stop

Disengagement Lever

2.812 (71.4)

2.50

(63.5)

2.60 (66.0)

HMO-4002 Non-Rotation

Bracket

Mounting Surface

∆

P Ports

Barbed

Connections

for 1/4" FR

Tubing

5.312 (134.9)

Removeable Conduit Fitting with 1/2" NPS Threaded Hole

Open &

LEDs

Min/Max

Flow

Setting

Pots

Min/Max

Flow Limit

Meter Taps

Illustration 1—Overview (Direct-Coupled Mounting)

NOTE: For VAV applications with the analog

CTE-5202 thermostat, see the CTE-5202

Applications Guide. For static pressure

3. Align the actuator and slide it onto the shaft.

approximately 5° may provide tight

damper shut-o.

controller applications, see the CSP-

4702 Static Pressure (Bypass) Control Application Guide.

4. Leaving a small gap between the actuator and mounting surface to prevent any binding, ngertighten the nuts on the V-bolt.

The CSP-4702 mounts directly to 1/4- to 5/8-inch (6 to 16 mm) round shafts or 1/4- to 7/16-inch (6 to 11 mm) square shafts.

5. Insert the provided (HMO-4002) non-rotation bracket into the slot at the base of the actuator and secure the non-rotation bracket with two #8

1. Ensure the damper can move freely through its or #10 self-tapping screws.

entire range of motion, and x any binding before installing the actuator. Turn the damper blade to its fully closed position.

2. Press (to the right) and hold the gear disengage-

ment lever (see Illustration 1), rotate the actuator to the fully closed position, and release the lever.

NOTE: Depending on the damper-seal design,

backing the actuator o its stop

6. Evenly tighten the V-bolt nuts (30–35 in-lb.).

7. If desired, use a 7/64-inch hex key wrench to loosen and position the end-stop screw.

NOTE: The two holes at the top of the actuator

are NOT for use in direct-coupled applications. (They are for remote

mounting, such as with the optional HLO4001 Crank Arm Kit.)

CSP-4702 1 Installation Guide

Wiring Connections

Air Pressure Connection

1. Loosen the screw on the conduit ing and lift up to remove the ing.

2. Using a utility knife or drill, cut the red plug to accept wiring or replace the plug with an application-specic ing.

NOTE: The red plug (or similar ing) protects

internal components from debris, helping to ensure long actuator life.

3. Thread wires through the plugged opening and connect to the terminal block as shown.

4. Make the air pressure connections (see Air

Pressure Connection on page 2), set MIN/

MAX ow (see Min. and Max. Flow Limits on

page 3), and change the rotation direction (see Rotation Direction on page 2) as needed.

5. Reinstall the conduit ing and tighten the screw.

~24 VAC (Class 2 Only) Power

Common (Power, Input, Outputs)

2–10 VDC Thermostat Signal (Input) 1–5 VDC Air Pressure Signal (Output) 16 VDC Power to Thermostat (Output)

Connect the CSP-4702 to a dierential pressure ow sensor with 1/4-inch OD x 0.040-inch wall FR instrument and control tubing:

1. Connect the “HI” port to the

“ L”

“H”

(high side) “H” of the sensor.

2. Connect the “LO” port to the (low side) “L” of the sensor.

NOTE: For use as a static pressure controller, see

the CSP-4702 Static Pressure (Bypass)

Control Application Guide.

NOTE: For VAV applications, the SSS-1000 series

dierential pressure ow sensor must be mounted with the arrow pointing in the direction of the air ow. To connect to 1/4inch tubing from the CSP-4702, an SSS-100x dierential pressure ow sensor requires a 3/8" to 1/4" barb union adapter and 1" of 3/8" OD x 0.062 “FR” tubing for both connections (as shown in the illustration). An SSS-101x sensor does not require the 3/8" tubing or adapter.

NOTE: All tubing should be free of kinks and

restrictions.

3/8" to 1/4" Union Adapters

3/8" Tubing

SSS-100x Sensor

Illustration 2—Connections

1/4-Inch Tubing

CSP-4702

Damper

24 VAC CTE-5202

(Used in VAV applications but not in static

SET POINT

pressure bypass applications)

Rotation Direction

The CSP-4702 is factory-set for counterclockwise to close. To reverse the direction (with the conduit cover removed), move the jumper to the CW position.

CCW = Jumper on Upper 2 Pins

Illustration 3—Rotation Indicators and Jumper

CSP-4702 2 Installation Guide

NOTE: For about 15 seconds after power is applied,

no rotation occurs and one or both of the LEDs will ash. The Close LED illuminates (solid red) when the actuator is closing. The Open LED illuminates (solid green) when opening. When the actuator reaches the end of rotation or the mechanical stop, the LED may stay illuminated a brief time if the called for condition remains unsatised.

Min. and Max. Flow Limits

NOTE: If desired, the min. and max. limits can be

set within the thermostat or the CSP-4702, but

do not try to set the limits at BOTH

the controller and the thermostat (or

else the limits will not reect either the

controller’s or the thermostat’s limits).

Limits Set at the CSP-4702

To set the minimum and maximum ow limits at the CSP-4702 (with thermostat supplying 2–10 VDC):

1. Ensure the thermostat output is 2–10 VDC. For

the CTE-5202 thermostat, see the CTE-5202

Applications Guide.

2. Loosen the screw on the conduit ing and lift up to remove the ing.

3. Connect a voltmeter to the meter taps. The middle pin (REF) is the common for the outer (MIN and MAX) pins.

4. Adjust the MIN potentiometer for the desired minimum voltage. The factory default is 0 VDC = 0" wc.

NOTE: 1 VDC = 1" wc. If, for example, the desired

minimum is 0.5" wc, set the voltage for 0.5 VDC.

5. Adjust the MA X potentiometer to the desired maximum voltage. The factory default is 2 VDC = 2" wc.

NOTE: If, for example, the desired maximum is 1.5"

wc, set the voltage for 1.5 VDC.

6. Reinstall the conduit ing and tighten the screw.

Limits Set at the Thermostat

To set the ow limits at the thermostat (with CSP4702 potentiometers set at their defaults):

1. Return the CSP-4702 potentiometers to the factory defaults if necessary (see above).

2. Set the thermostat output limits according to its instructions. For the CTE-5202 thermostat, see the

CTE-5202 Applications Guide.

NOTE: Voltage from the thermostat = desired ΔP

x (voltage span = 8 VDC)/(pressure span = 2" wc) + 2 VDC. For example, if a minimum

of 0.1" is desired instead of the default 0", then 0.1 x 4 + 2 (= 0.4 + 2) = 2.4 VDC for the minimum limit. If a maximum of 1.9" is desired instead of the default 2", then 1.9 x 4 + 2 (= 7.6 + 2) = 9.6 VDC for the maximum limit.

LIMITS

0-2 VDC / 0-2"H2O

MIN REF MAX

Illustration 4—CSP-4702 Limits Adjustment

Operation Test

To test the CSP-4702 operation:

1. Temporarily disconnect the thermostat signal wire leading to the “2–10 IN” terminal.

2. Jumper the “2–10 IN” terminal to the “16 VDC OUT” terminal. The green Open LED should illuminate, and the shaft drive hub should start rotating the damper open. The damper should go to full open unless the maximum limit was set at the CSP-4702, and then the damper will only go to the maximum seing. If the damper is rotating closed, change the direction jumper. (See

Rotation Direction on page 2.)

3. Remove any jumper to the “2–10 IN” terminal. If there is a normal amount of airow in the duct at the time (creating a dierential pressure exceeding the minimum limit), the red Close LED should illuminate, and the shaft drive hub should be rotating the damper closed. The damper should go to full closed unless the minimum limit was set at the CSP-4702, and then the damper will only go to the minimum seing. If the damper is rotating open, change the rotation direction jumper. (See Rotation Direction on page 2.)

4. Reconnect the thermostat signal wire to the “2–10 IN” terminal.

5. Adjust the thermostat’s setpoint all the way up (simulating a drop in temperature and a need for less cooling or more heating) and then all the way down (simulating a rise in temperature and a need for more cooling or less heating) and check that the damper position reacts accordingly.

Maintenance

No routine maintenance is required. The motors are permanently lubricated and all internal geartrain components are oil-impregnated. Careful installation will also ensure long term reliability and performance.

CSP-4702 3 Installation Guide

Troubleshooting

Static Pressure Control

No Rotation

NOTE: For about 15 seconds after power is applied,

no rotation occurs and one or both of the LEDs will ash.

• Check that the shaft moves freely. (Press and hold the gear disengagement lever and manually rotate the shaft.)

• Check wiring. (See Wiring Issues section below.)

• Check for a tripped circuit breaker to the

transformer, for proper supply voltage from the transformer (or power supply), and for enough capacity (VA) for all connected devices. See their respective data sheets and Tips for Connecting

24-Volt Power Application Note (AN0604D)

available on the KMC Controls web site.

• Check that the direction jumper is in the proper position. See Rotation Direction on page 2.

• Check the polarity and level of the input signal from the thermostat.

Wrong Rotation Direction or Stroke Range

• Check the position of the direction jumper. See

Rotation Direction on page 2.

• Check the ow limits (on the controller and the thermostat). See Min. and Max. Flow Limits on

page 3.

Besides VAV applications, the CSP-4702 can also act as a static pressure controller in such applications as AHU or RTU bypass control. It is not then connected to a thermostat. For information, see the CSP-4702

Static Pressure (Bypass) Control Application Guide.

More Information

For specications, see the CSP-4702 Data Sheet on the KMC web site.

For applications (with the CTE-5202 thermostat) and other information, see the CTE-5202

Applications Guide.

• Check the adjustable stop position.

No Pressure Output Signal

• Check the wiring. (See Wiring Issues section below.)

• Check air ow and sensor. Tubing should be free of kinks and restrictions. Sensor must be oriented in the correct airow direction.

Wiring Issues

• Check for correct wiring at the each device.

• Use a voltmeter and ohmmeter to check the

terminals for expected values.

• See Tips for Connecting 24-Volt Power Applica-

tion Note (AN0604D).

NOTE: Wiring must be adequate to avoid

excessive voltage drop on long runs! Allow plenty of “cushion” in measurements. A meter may be too slow to register transient dips or peaks during startup.

For information about using the CSP-4702 as static pressure controller in AHU/RTU bypass applications, see the

CSP-4702 Static Pressure (Bypass) Control Application Guide.

KMC Controls, Inc.

19476 Industrial Drive

New Paris, IN 46553

574.831.5250

www.kmccontrols.com; info@kmccontrols.com

CSP-4702 4 Installation Guide