MEDC TH12 - Manual (Page 4)

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 rotating assembly to the cover. Keep in a
safe accessible location as they are non-captive
Lift the rotating assembly away from the cover, thus exposing the bulb. Carefully remove the old bulb ensuring
it is disposed of correctly. The replacement bulb can now be carefully fitted into the bulb holder. Care must be
taken to ensure that the replacement bulb is the same wattage and fitting type (H1) as the original.
Replace the rotating 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 rotating assembly fixing points during re-assembly.
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 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
5.0 CERTIFICATION/APPROVALS
IECEx units
Certified to IEC60079-0 and IEC60079-1
Ex d unit (IEC certification No. IECEx BAS 10.0094)
Ex d IIB T3 (-55°C to +70°C) Gb
T4 (-55°C to +55°C) Gb
The IECEx certificate and product label carry the IECEx equipment protection level marking
Gb
Where Gb signifies suitability for use in a Zone 1 surface industries area in the presence of gas.
ATEX units
Certified to EN60079-0 and EN60079-1
Ex d unit (ATEX certification No. BAS99ATEX2196)
Ex d IIB T3 (-55°C to +70°C) Gb
T4 (-55°C to +55°C) Gb
02/11 © Cooper MEDC 2010