DOCUMENT 2421
REV. L
Instruction Manual
ICAO Approach Fixture
12
8.5
Power Lead/ Feedthru Replacement
The power leads are connected to water tight feedthrus in the inner cover. There is a coating
of RTV over the connections, and an epoxy material to encapsulate the entire assembly. The
power cord and feedthru components can be replaced, but shipping restrictions prohibit
Crouse-Hinds from supplying the epoxy encapsulating material. The complete inner cover
assembly, with leads is part number 21286-X. Follow the instructions below to rebuild the
power lead/feedthru assembly.
Remove and secure power to the fixture.
Turn the fixture upside down and remove the six
screws holding the inner cover to the light housing. Remove the Teflon leads inside the cover. Cut
the power leads off at the encapsulating material. Using a hammer and chisel, separate the
encapsulating material from the inner cover. Be careful to not damage the inner cover. Remove
and discard the feedthru assemblies. Carefully clean the feed-thru mounting area in the inner
cover, inspect for any mechanical damage that would prevent a water tight seal. Replace the
feedthru components, refer to Figure 6 for part numbers and orientation. Replace the Teflon leads
inside the cover. Replace the optical housing’s o-ring per paragraph 8.3. Assemble the inner
cover onto the light housing. The screw-hole patterns in the inner cover and light housing are
offset to insure proper alignment. Torque the mounting screws to 30 in-lbs. Perform a pressure
test per paragraph 8.6. Secure the light fixture to the base per section 7.
8.6
Pressure Test
A light fixture should be subjected to a 20-psi air pressure test to verify that it is waterproof
whenever it has been opened or components have been replaced. A tire valve style pressure
fitting is located on the bottom of the inner cover. Pressurize the fixture to 20-psi then place it
in a tub of water or use a soap solution to locate escaping air bubbles. Carefully inspect the
areas around the lens, inner cover seal, and feed-thru adapter for leaks. Relieve the internal air
pressure before installing the fixture or attempting to repair a leak.
WARNING
WARNING:
Do not exceed 20-psi when pressure testing the fixture. Serious injury and/or permanent
damage to the fixture may result if a higher air pressure is used. Once the pressure test is
complete, be sure to relieve the air pressure.
Содержание Crouse-Hinds 8506A-CS-P1
Страница 15: ...DOCUMENT 2421 REV L Instruction Manual ICAO Approach Fixture 15 Figure 1 Exploded View of Fixture ...
Страница 16: ...DOCUMENT 2421 REV L Instruction Manual ICAO Approach Fixture 16 Figure 2 Isometric View of Fixture ...
Страница 18: ...DOCUMENT 2421 REV L Instruction Manual ICAO Approach Fixture 18 Figure 5 Bottom View of Fixture ...
