TCW CVS-24v-kit, CVS-24v-kit-HD Installation Guide

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Control Valve Servo Kit

CVS-24v-kit

CVS-24v-kit-HD

The CVS-24v kit is a system for controlling valves and dampers such as those used to select cabin heat or ventilation or control air flow through oil coolers or radiators. The CVS kit includes an instrument panel mounted controller, a linear actuator servo and a premade 5 foot wiring harness. The controller provides fully proportional operation of the linear actuator servo, allowing the motion of the attached valve or damper to be selected at any position from fully opened to fully closed. Additionally, the CVS system may be coupled to an optional butterfly valve (3” or 4” available) for controlling the flow of cooling air through an oil cooler assembly.

CVS-24v-kit includes a 30 mm travel servo

CVS-24v-kit-HD includes a 50 mm travel servo

Linear actuator servo, panel mounted controller, 5 foot wiring harness

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The CVS kit must be installed using the current aircraft standards and practices as shown in AC 43.13-2A/1B. The installer/builder is solely responsible for determining the suitability of the installation and use of this product.

Installation Instructions:

1) Select an appropriate location in the aircraft for the CVS panel mounted controller, ensure there is adequate clearance available behind the controller for the wiring harness and that the circuit board does not come into contact with other metallic objects or devices.

2) Drill a mounting hole and an anti-rotation hole per the drawing in figure 1.

Ø 0.276

Ø 0.081

0.181

Figure 1.

3) Attach the white, 8 pin wiring harness connector to the pcb and then install the potentiometer shaft thru the mounting hole and add the washer and nut. Rotate the pcb until the indexing tab on the potentiometer aligns with the anit-rotation hole, then tighten the pot shaft nut.

4) Strain relieve the wiring harness within 6” of the white 8 pin connector. It is important that the wiring harness is not pulling on the controller circuit board. Use a cable tie and mounting plate to secure the wiring harness to the aircraft.

open close

connector

Wire harness

Strain relieve

within 6"

Indexing pin

Figure 2.

(Note: Open and close pots correspond to actuator motion when wire harness colors are aligned, if you use reverse polarity connection, open and closed pots are reversed)

5) Mount the linear actuator servo using the hardware provided. NOTE: it may be

helpful to temporarily connect the wiring harness to the actuator and apply 12 volts to

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the controller to evaluate the full travel available from the linear actuator. You must ensure that the travel required to get full motion of the device you are controlling is available, this can be strongly influence by the mounting location of the actuator and any control arms on the device. Also note, you can always limit the travel after installation by utilizing the two blue trimmer potentiometers on the side of the controller, however you cannot cause addition travel beyond the fixed length of the linear actuator arm.

When connecting the black 5 pin connector at the linear actuator you can select the

direction the actuator travels with respect to the control knob rotation on the controller circuit board by simply flipping the connector body over. This connector is nonpolarized and will mate properly in either direction.

NOTE: THESE DRAWINGS ARE FOR THE STANDARD DUTY 30 MM SERVO,

NOT THE 50 MM HEAVY DUTY SERO

See figures 3, 4, and 5 for examples of mounting the linear actuator. Figure 3 shows

the linear actuator used in conjunction with our 4” butterfly valve for controlling oil temperature on a Van’s RV-10 system. Figure 4 and 5 shows the linear actuator

being used to control a cabin heat flapper valve on an RV-10. Example dimensions are shown in the figures for locating the C shaped mounting bracket.

Start the mounting process by attaching the servo to the control arm of heater valve

or oil cooler butterfly valve using the provided hardware. Follow this by temporarily mounting the C shaped bracket to the other end of the servo. Hold the servo in the approximate installation location and check the mounting location of the C shaped bracket. Confirm the mounting location by operating the servo over its full travel, ensure the valve can move thru the required range of motion. When satisfied with the motion of the servo, drill a hole for the C shaped bracket and securely bolt in place. Attach the servo and recheck the full range of motion.

If necessary the travel of the servo can be reduced using the two blue trimmer potentiometers on the side of the controller.

IMPORTANT NOTES on adjusting the full travel of the servo: a) Make very small adjustments of the trimmer potentiometers, after each

adjustment run the servo all the way to the opposite end of travel then back to end being adjusted.

b) Each trimmer is dedicated to adjusting one end of the travel, however, it does have some influence on the opposite end therefore it is important to make small adjustments and always check the opposite end after each adjustment.

c) During the trimming process avoid running the servo to the absolute end of travel. Ensure that the active travel area commanded by the control knob leaves about 1/32” or more of actuator shaft unused at each end.

d) If during the trimming process you need to get back to the factory shipped settings, turn both trim pots fully counter- clockwise, then back them off about 1/16” at the pointer end of the pot.

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6) After completing the travel adjustments route the wiring harness and properly fasten the wires to the airframe using cable ties. Connect the wiring harness to the linear actuator and strain relieve the wires. Add a piece of heat-shrink tubing over the black connector to lock it in place.

7) Connect the two power leads from 8 pin connector to aircraft power and ground. Connect the red + to aircraft power via a 2 amp fuse or circuit breaker. Connect the

black - flying lead to aircraft ground.

For service or if you have questions, please contact us. 610-928-3420

www.tcwtech.com

email: [email protected]

TCW Technologies, LLC. 2955 Main Road East Emmaus, PA 18049

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NOTE: THESE DRAWINGS ARE FOR THE STANDARD DUTY 30 MM SERVO,

NOT THE 50 MM HEAVY DUTY SERVO

firewall

2.625

Oil cooler mount

Butterfly valve

Drill for this bracket

Figure 3. RV-10 oil cooler assembly with CVS system

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0.50

.43

Figure 4. Mount C bracket, install 8-32 x 1.25 bolt with spacer

Figure 5. Servo mounted in C bracket

8-32 x 1.25" bolt

with spacer

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SPECIFICATIONS: CVS-24v-kit-HD series

Input Voltage: 22-30 volts DC Input Current 0.1 amp Servo 50 mm max travel Max drive force 10 lbs. Max holding force 40 lbs. Temp range -30 C to +70 C Weight servo: 1.1 oz.

Controller: 1.0 oz.

SPECIFICATIONS: CVS-24v-kit Standard series

Input Voltage: 22-30 volts DC Input Current 0.1 amp Servo 30 mm max travel Max drive force 2.5 lbs. Max holding force 10 lbs. Temp range -30 C to +70 C Weight servo: 1.1 oz.

Controller: 1.0 oz.

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TCW Technologies, LLC.

During the first 12 months from the date of purchase and subject to the conditions hereinafter set forth, TCW Technologies, LLC. (TCW) will repair or replace to the original user or consumer any portion of your new TCW product which proves defective due to defective materials or workmanship of TCW. Contact TCW Technologies for warranty service. TCW shall have and possess the sole right and option to determine whether to repair or replace defective equipment, parts or components. Damage due to equipment, environment or conditions beyond the control of TCW Technologies are NOT COVERED BY THIS WARRANTY.

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This Warranty gives you specific legal rights and you may also have other rights which vary from state to state. In the absence of other suitable proof of this installation date, the effective date of this Warranty will be based upon the date of manufacture plus one year. Direct All Notices To: Warranty and Product Service Department, TCW Technologies, 2955 Main Road East. Emmaus, PA 18049