MEDC FB12 Notice Technique page 4

The internal earth terminal, where fitted, must be used for the equipment grounding.
Once termination is complete, carefully replace the cover assembly back onto the base, avoiding damage to
the mating surfaces. Replace the 6 off M8 screws (6.0mm A/F hexagon key) into the holes in the cover as-
sembly 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 OPERATION
The operating voltage of the unit is stated on the unit label. The unit can be powered directly only
60±1 60±1
4.0 MAINTENANCE
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 filament bulb (see below) can be carried out by competent site personnel. 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. All 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 filament bulb
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew and remove the 6 off M8 (6.0mm A/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 three M4 screws and washers holding the mounting plate assembly to the cover. Keep
in a safe accessible location as they are non-captive
Lift the mounting plate assembly away from the cover, thus exposing the bulb. Carefully unscrew and remove
the old bulb ensuring it is disposed of correctly. The replacement bulb can now be fitted by carefully screwing
it into the bulb holder. Care must be taken to ensure that the replacement bulb is the same wattage and fiting
type (E27) as the original.
Replace the mounting plate assembly onto the mating face of the cover and secure using the three off M4
screws and washers. Ensure the retaining strap is fitted to one of the mounting plate assembly fixing points
during re-assembly.
©
05/17
60±1
280±2 250±1 ø202±2
CRS
60±1
6±1
M8 X 11±1 DEEP
DIRECT MOUNTING
HOLES
2 POSITIONS
FIXING HOLES ø11.5±1
2 POSITIONS
OPTIONAL GUARD
45±1
172.5±2
275.5±2
307±3
ENTRY
'L'
30±1
ø242±2
© Eaton MEDC Ltd 2017
ENTRY
'R'