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To install cable:
For the first time i.e. installing a cable type that has not been installed before and whose characteristics are
unknown.
Using the supplied airline adaptor, connect the air lines to the
machine and the compressor (checking the ball valves and
flow control valve on the motor are closed).
It is now necessary to set the torque to a position appropriate
to the stiffness of the cable and the characteristics of the cable
insulation. This is done via the control knob and pressure
gauge, if in doubt start at 2 bar. See Appendix 2 for recom-
mendations. If the cable type has been installed before, the
settings will be available; the torque control pressure may be
set at the previously determined position.
Open the motor ball valve.
Slowly open the flow control valve.
The rollers will now start to turn and the cable will feed through
the air box (increase speed setting to max. if required). When
the cable has travelled a reasonable distance, (say 100 me-
ters) turn on the air feed to the air box; this will help the machine to feed the cable.
The microduct route, through which the cable is to be fed, should be configured in such a way that the cable
can feed all the way along the microduct and out the other end. It will be necessary to be able to determine
when the cable has emerged at the other end of the microduct route. A typical way of achieving this aim is to
have a colleague positioned at the end of the microduct run; in contact with the main installer using a radio
transmitter/receiver of some description. In this way the main installer may be advised when the cable has
completed the run, he can then stop the machine.
If there is an unexpected obstruction in the microduct route the rollers will see this as an increase in torque
demand, assuming the torque control pressure has been set at an appropriate level, the rollers will stop turn-
ing before they push the cable so hard as to cause it to buckle. If (due to lack of previous knowledge of the
cable characteristics) the torque control pressure has been set at a figure which is too small to push the cable
the setting may be increased. Bear in mind that this will increase the risk of the cable being damaged by
buckling.
Grounding the Airstream Cable Blower.
Certain cable/duct combinations can generate large static build-
ups. If this is occurring, ground the Airstream via the ground
point on the air box via a suitable copper conductor to a ground
at the power source or earth.
Grounding Point
Airlines are connected as shown
