Martin MiniMAC Maestro Manual de usuario descargar pdf (Pagina 59)

Seal maintenance 59

• Tighten the screws that hold the end plates, lamp access plate and

retaining ring for the front glass (or PC lens on 12° beam angle models)

gradually in stages to a torque of 2 Nm (1.5 ft.-lbs.). At this torque, the

seals will be compressed by about one-third.

• When replacing the front cover, to avoid breaking the glass, tighten the

screws gradually in stages, working around in a circle.

The recommended procedure for closing each of the 4 openings is the

same:

1. Insert the screws through all holes in the cover and seal.

2. Place the cover firmly against the body. Adjust the straight sides of the

seal so that they stick out a little, just enough so that you can feel the

edge of the seal when you run a finger across the joint.

3. Cross-tighten the cover screws evenly, gradually increasing the torque in

stages to the correct setting of 2 Nm (1.5 ft.-lbs.).

If installing the eight M4 Allen screws in the front glass retaining ring or PC

lens retaining ring on the outside of the front cover, tighten screws evenly

and gradually, working around the ring in a circle, until you reach the correct

torque of 2 Nm (1.5 ft.-lbs.). If you tighten one screw too much compared to

the others, the pressure from that screw may break the front glass or lens.

Cable glands

The supplied cables enter the fixture through cable glands that fit 5.5-10 mm

(1/4 - 2/5 in.) diameter cables. The gland must be replaced if the power or

data cable is replaced with a cable of a different diameter (larger than 10

mm or smaller than 5.5 mm (1/4 - 2/5 in.), or if the data cable is replaced

with two separate cables. Replacement glands, available from electrical

suppliers, must have the following characteristics:

Temperature range 20 to 70 degrees Celsius (or better)

Ingress protection rating IP 67 or 68

Entry thread size PG 11

Minimum entry thread length 8 mm

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Martin MiniMAC Maestro Manual de usuario Pagina 59