Condux Innerduct Pressure Test Kit - Manual (Page 6)

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8. Inform all crew members that the innerduct is about to be pressurized.
!WARNING: Ensure no personnel are in the destination manhole or
trench during the blowing operation. Severe personal injury could
result.
9. Slowly open the Air Control Valve. Pressurize the innerduct to between 100 and 120
psi (6.9-8.3 bar).
!WARNING: Forced air creates flying debris. Always wear personal
protective equipment. Severe personal injury could result.
10. Prove the duct integrity:
• Close the Air Control Valve.
• Wait 2 minutes; read pressure on gauge.
• Duct must not lose more than 20 psi (1.4 bar) over this 2 minute period.
11. After reading the innerduct’s internal air pressure, relieve the air pressure by pulling
open the Air Pressure Relief Valve.
12. An alternate method of relieving air pressure is as follows:
• Close the Air Control Valve on the Control Valve Assembly.
• Shut down the air compressor.
• Relieve the pressure in the air compressor storage tank and in the air line from
the air compressor to the Control Valve Assembly.
• Disconnect the air line from the Control Valve Assembly.
• Open the Air Control Valve on the Control Valve Assembly to relieve the
pressure in the innerduct.
!WARNING: The pressure must be relieved from the innerduct
before removing the Seal-Off Head, Control Valve Assembly, Pulling
Grip or Innerduct Pulling Eye. Severe personal injury could result.
If the innerduct does not hold the required pressure, check the entire duct run for leaks and
repair them.
All leaks must be located and repaired before the Fiber Optic Cable
Blower is used to install fiber optic cable into this section of innerduct.
Repeat the pressure test until all leaks are found and repaired and the system holds the
required pressure.
!WARNING: The Pulling Grip and Innerduct Pulling Eye must be
removed from the far end of the innerduct before starting the cable
blowing process. Damage to the Fiber Optic Cable or severe
personal injury could result.