MEDC XB11 Notice Technique page 3

3.0 oPErAtIon
The operating voltage of the unit is stated on the unit label. The unit can be powered directly or initiated via a telephone
ringing signal if requested when ordered.
3.0 OPERATION
The operating voltage of the unit is stated on the unit label. The unit can be powered directly or initiated via a
telephone ringing signal if requested when ordered. GEnErAL ArrAnGEMEnt/ScHÉMA GEnErAL/AuFBAu/GEnErALIdAdES
4.0 MAIntEnAncE
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
During the working life of the unit, it should require little or no maintenance. GRP will resist attack by most
and chemicals and is as resistant to concentrated acids and alkalis as most metal products.
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 inspec-
However, if abnormal or unusual environmental conditions occur due to plant damage or accident etc., then
tion is recommended.
visual inspection is recommended.
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build up.
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build up.
Replacement of the xenon tube (see below) can be carried out by competent site personnel. Other repairs should be
Replacement of the xenon tube (see below) can be carried out by competent site personnel. Other repairs
undertaken by returning the unit to MEDC or by an authorised repairer of Ex equipment.
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 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
If you acquired a significant quantity of units, then it is recommended that spares are also made available.
your requirements with the Technical Sales Engineers at MEDC.
Please discuss your requirements with the Technical Sales Engineers at MEDC.
removing / replacing xenon tube
Removing / replacing xenon tube
cAutIon: Before removing the cover assembly, ensure that the power to the unit is isolated.
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew and remove the 6 off M5 (4.0mm A/F hexagon key). Keep in a safe, accessible location as they are non-
Unscrew and remove the 6 off M5 (4.0mm A/F hexagon key). Keep in a safe, accessible location as they are
captive
non-captive
Twist the cover assembly gently clockwise and anti-clockwise, whilst pulling it away from the base. Remove to gain access
Twist the cover assembly gently clockwise and anti-clockwise, whilst pulling it away from the base. Remove to
to the interior.
gain access to the interior.
Unscrew and remove the two M3 nuts and washers holding the circuit board to the cover pillars. Keep in a safe acces-
Unscrew and remove the two M3 nuts and washers holding the circuit board to the cover pillars. Keep in a
sible location.
safe accessible location.
Lift the electronics assembly away from the support pillars, thus exposing the xenon tube. Remove the old tube by unscrew-
Lift the electronics assembly away from the support pillars, thus exposing the xenon tube. Remove the old
ing the terminal block fixings. The replacement tube can now be fitted (see xenon tube installation sheet, which is supplied
tube by unscrewing the terminal block fixings. The replacement tube can now be fitted (see xenon tube
with the replacement tubes)
installation sheet, which is supplied with the replacement tubes)
Replace the electronics assembly onto the support pillars and secure using the two off M3 nuts and washers. Ensure the
Replace the electronics assembly onto the support pillars and secure using the two off M3 nuts and washers.
retaining strap is fitted to one of the electronics assembly mounting pillars during re-assembly.
Ensure the retaining strap is fitted to one of the electronics assembly mounting pillars during re-assembly.
Carefully replace the cover assembly back onto the base, avoiding damage to the mating surfaces. Replace the 6 off M5
Carefully replace the cover assembly back onto the base, avoiding damage to the mating surfaces. Replace
screws (4.0mm A/F hexagon key) into the holes in the cover assembly and tighten evenly. Ensure the O-ring is seated
the 6 off M5 screws (4.0mm A/F hexagon key) into the holes in the cover assembly and tighten evenly.
correctly on the cover during re-assembly. Ensure the required maximum gap of 0.2mm is maintained between the cover
Ensure the O-ring is seated correctly on the cover during re-assembly. Ensure the required maximum gap of
and the base once assembled
0.2mm is maintained between the cover and the base once assembled
© Cooper MEDC 2010 12/10