DOCUMENT 1136
REV. G
Instruction Manual
Pro APF Series LED
ICAO TCL, IHP, & STP
3
7 General Description
The Crouse-Hinds IEC Style 3 ICAO taxiway centerline (TCL), intermediate hold position (IHP), and stop
bar (STP) lights are designed for installation coincident or perpendicular to the centerline of taxiways or
any other location where visual guidance of moving or stopped aircraft or ground vehicles is desirable.
These lights meet the photometric requirements of
ICAO Annex 14, Volume 1, Appendix 2
, and Figures A2-
12 through A2-16. The light units are designed to fit on a 203mm light base (P/N 22537-4, 87103-4. 21378-
4, or 21388-4) and have a total height above grade/ground level of ≤ 6mm. The TCL is often a bi-
directional light, but it also may be a unidirectional light. The IHP and STP are always uni-directional
lights. Light beams can be straight, toed, or curved. Refer to sections 6 and 8.3 to determine light beam
direction(s). They are weatherproof and will endure roll over loads without damage. The light units consists
of an optical assembly that must be secured to a light base using four high-strength bolts, four 2-piece lock
washers. The optical assembly has a die cast inner cover that is attached to a forged aluminum optical
housing using four screws. An o- ring is used to provide a water-tight seal between the inner cover and the
optical housing. There may be an optional gasket bonded to the outer cylinder of the inner cover to seal the
optical assembly to a light base. Either one or two LED modules are fastened to the optical housing. The
primary light emitting lenses are held into the optical housing with a bracket, gasket and elastomeric boot.
All IHPs, all STPs, and one plug (P1) TCLs have one power supply fastened to the inner cover. Two plug
(P2 option) and one plug with independent power supplies (B1 option) TCLs have two power supplies
fastened to the inner cover. Electrical connections are made at one or two feed-through assemblies in the
inner cover. The feed-throughs have ITS verified L-823 plugs for connecting to FAA L-830/ L-831
isolation transformers. All fasteners are type 18-8 stainless steel. The complete light unit is 203mm in
diameter, 91mm deep, and weighs 2.7kg.
IMPORTANT
IMPORTANT
Do not open any light unit unless the warranty period has expired.
Opening a light unit will void the warranty
CAUTION
CAUTION:
Never handle the light unit by the leads as this can break the waterproof seal
8 Installation
The IEC Style 3 TCL, IHP, and STP light units are shipped complete, including the LED module(s), and
are ready for installation as received. Installation of the light unit is to be done with the primary POWER
OFF and SECURED. At each light location, install a 203mm (8-inch) diameter light base with the
alignment groove perpendicular to the taxiway centerline. For flush-to-grade installations, use Crouse
Hinds base P/N 22537-4 or 87103-4. For below grade installations, use Crouse Hinds base P/N 21378-4 or
21388-4. Install the properly sized isolation transformer(s) and make necessary primary power connections
using FAA L-823 connectors. Isolation transformer requirements are dependent on a light unit’s plug and
heater options. The light units’ minimum isolation transformer requirements can be found in section 12,
tables 2 and 3. All isolations transformers are 6.6 ampere secondary models.