MEDC FL11 Technische Anleitung Seite 4

Once termination is complete, carefully replace the cover assembly back onto the base, avoiding damage
to the mating surfaces. Replace the 6 off M5 screws (4.0mm /F hexagon key) into the holes in the cover
assembly and tighten evenly. Ensure the O-ring is seated correctly on the cover during re-assembly. Ensure
the required maximum gap of 0.2mm is maintained between the cover and the base once assembled.
3.0 OPER TION
The operating voltage of the unit is stated on the unit label. The unit can be powered directly only.
GENER L RR NGEMENT
4.0 M INTEN NCE
During the working life of the unit, it should require little or no maintenance. GRP will resist attack by most
acids, alkalis and chemicals and is as resistant to concentrated acids and alkalis as most metal products.
However, if abnormal or unusual environmental conditions occur due to plant damage or accident etc.,
then visual inspection is recommended.
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build up.
Replacement of the fluorescent tube (ac units only, see below) can be carried out by competent site personnel.
On dc units, a replacement electronics assembly is required as the fluorescent tube is soldered directly to
the electronics PCB. Other repairs should be undertaken by returning the unit to MEDC or by an authorised
repairer of Ex equipment.
If a unit fault should occur, then the unit can be repaired by MEDC. ll parts of the unit are replaceable.
If you acquired a significant quantity of units, then it is recommended that spares are also made available.
Please discuss your requirements with the Technical Sales Engineers at MEDC.
Removing / replacing fluorescent tube (ac units only)
C UTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew and remove the 6 off M5 (4.0mm /F hexagon key). Keep in a safe, accessible location as they
are non-captive
Twist the cover assembly gently clockwise and anti-clockwise, whilst pulling it away from the base. Remove
to gain access to the interior.
Unscrew and remove the two M3 nuts and washers holding the tube assembly to the cover. Keep in a safe
accessible location.
Lift the tube assembly away from the cover assembly, thus exposing the fluorescent tube. Remove the old
tube by carefully pulling it away from the tube holder. The replacement tube can now be fitted by alining
the connecting pins and pushing the tube into the holder. Care must be taken to ensure that the replacement
tube is the same wattage and base type as the original.
05/15 © MEDC 2015