3
Operating Instructions
Setup and Testing
The COBRA-5 is designed for use with a portable negative air machine to thoroughly clean
round, square and rectangular ducts. Caution must be used when cleaning soft surface ducts
such as older, deteriorated duct-board or flexible ducts. There is a torque control switch to
reduce the torque when using the more flexible 5/16” Dryer Duct cable and accessories. Always
use the LOW torque setting when using the dryer duct cable.
1.
Place the Cobra 5 drive unit on the floor or other stable surface near the ducts to be cleaned.
2.
Verify that the speed control on the panel is at “0”, the power switch on the panel is off, “0”,
and the remote control is in the center “Off” position. (Page 6,7)
3.
Connect the power cord to the inlet receptacle on of the motor unit panel and to a standard
115 volt AC outlet. (Page 6,7)
4.
Set the “Torque” switch to “LOW” when using the dryer duct cable. The standard cable
requires the “HIGH” torque setting in most cases.
5.
Attach the flexible shaft to the motor unit by first aligning the square end of the shaft with the
square hole in the drive unit, then screwing the black disconnect nut onto the 2” diameter,
threaded end of the coupler. This nut should be snug, but NOT excessively tight.
6.
The FWD/REV switch on the panel and remote should be in the center or “Off” position.
7.
Hold the outer cable housing near the Flex-E-Bristle Brush. Hold the brush where it will not
hit you or other objects when it begins to rotate.
8.
Turn on the power switch, then turn the speed control to approximately “30”.
9.
Using caution, flip the switch on the remote to “Forward” and wait a few seconds for the
brush to begin to turn slowly. If it fails to turn, go to the trouble shooting section, page 9.
10.
Once the brush is turning, you may want to test the unit by increasing the speed slowly to
maximum then back to zero. Be careful to not let the brush hit anything breakable. The
remote switch can be set to “Off”, then “Reverse” and the speed control slowly adjusted up
and down to complete the test. Use caution when changing the direction of rotation. Pause
in the “STOP” position momentarily when changing from Forward to Reverse or Reverse to
Forward or the cable may flip around with the possibility of hitting breakable objects in the
immediate area.
11.
The brush MUST BE STOPPED BEFORE INSERTING IT INTO AN AIR DUCT.
12.
DO NOT CRIMP THE CABLE WHEN STORING OR TRANSPORTING. THIS MAY
BEND THE STRANDS IN THE CABLE CAUSING PREMATURE FATIGUE AND
FAILURE.
