Instruction manual

AM.11.100e edition 1.4

Chapter 4: Servicing in the Maintenance Base 35

How to close and test the light fixture, continued

Step Action

Gently put the inner cover (F3) on top of the cover, taking into account

the keying pin between both parts. Make sure the optical assembly (F14)

and the lamp (E3) are correctly positioned and that the wires do not get

damaged between both parts: cover (B1) and inner cover (F3).

Press the inner cover (F3) on the cover (B1) and secure with new screws

(F4).

Refer to the table “Screws Overview” page 44 for the tool to use and the

torque to apply.

Check electrical insulation from two-pole plug to frame by means of a

500V insulation tester.

Apply an AC or DC voltage not exceeding 6 V across the two-pole plug

and observe normal operation of the lamp.

8 Check waterproofness of the fitting by applying with dry air a pressure of

0.4 bar (40 kPa) above the atmospheric pressure via the pressure

release hole. Whilst pressure is applied, immerse the light fixture for

three minute in water and look carefully for NO stream of bubbles

emanating from the light fixture.

If no leakage occurs, dry the fixture and remove the air hose.

Else, locate the leak source. Dry the fixture, remove the air hose.

Replace the leaking gasket or part (check the contact surfaces for any

scratches, corrosion or other damage) and repeat the test.

For this purpose a water-tightness test adapter can be ordered from ADB

(see ordering code page 48).

Replace the O-ring seal of the pressure release screw (F9) and secure

the pressure release screw.

Refer to the table “Screws Overview” page 44 for the tool to use and the

torque to apply.

Procedure