Siemens L-850D/E F-Range Style 2 Inset Lights manual How to close and test the light fixture

L-850D/E F-Range Style 2 Inset Lights Servicing in Maintenance Base

How to close and test the light fixture

Procedure	To close an optical unit, proceed as follows (for the tools to use, refer to page 43
	“Screws Overview”):
	Step	Action

1Turn the cover (B1) upside down.

2Make sure that the contact surfaces with the O-ring are clean.

3Put a new O-ring gasket (B9) greased with high quality neutral silicone grease (Siemens Airfield Solutions PN 7850.42.210) over the cover in the appropriate groove.

4Remove the pressure release screw (E11).

E11

E12

5Gently put the inner cover (E5) on the cover (B1), taking into account the keying pin between both parts. Make sure the lampholders and lamps are correctly positioned and that the wires of the lamps do not get pinched between cover and inner cover.

6Press the inner cover on the cover and secure with the screws (E10).

7Check electrical insulation from each two-pole plug to frame by means of a 500 V insulation tester.

Apply an AC or DC voltage not exceeding 15 V across each two-pole plug and observe normal operation of corresponding lamp.

8	Check waterproofness of the fitting by applying an overpressure of	1.4
	Atm (14kP) via the pressure release hole. Whilst pressure is applied,
	immerse the light fixture for one minute in water and look carefully for any
	air bubbles emanating from the light fixture.

9Make sure the O-ring seal (E12) is in good condition and secure the pressure release screw (E11).

Refer to the table “Screws Overview” on page 43 for the tool to use, the torque to apply, and the eventual use of “Loctite” sealing compound.

 2002 Siemens Airfield Solutions, Incorporated	96A0266D	27
All rights reserved	Issued 2/02