MEDC BG2 - Manual (Page 4)

Replacement of the glass:
To replace the glass after operation of the unit, remove the small cover held in place by the 2 slotted screws. Take
out the glass and remove any broken fragments from the unit. Place the new glass into the unit and replace the
cover, then test the unit as described below.
Testing the unit:
Using the test key provided, insert the key into the test hole (situated on bottom right hand side of the glass cover)
and engage into test cam. Turn the key in a clockwise direction (approx. 60°). This will simulate the breaking of
the glass. Release the key to reset the callpoint.
NOTE: MEDC DO NOT recommend forcing the test key further than 80° clockwise or 0° anti-clockwise as this
may lead to premature failure of the test cam.
4. MAINTENANCE
During the working life of the unit, it should require little or no maintenance. However, if abnormal or unusual
environ-mental conditions occur due to plant damage or accident etc., then visual inspection is
recommended.
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.
5. SPECIAL CONDITIONS FOR SAFE USE
1. The apparatus has a plastic enclosure which must only be cleaned with a damp cloth to avoid the danger
of ignition due to a build up of an electrostatic charge.
2. the apparatus must only be fitted with approved EExe glands and blanking plugs that will maintain the
ingress protection to at least IP6X
3. the apparatus must be installed in a location where it is protected against prolonged exposure to UV light
6. CERTIFICATION/APPROVALS
Certified to EN50014:1997 + Amds 1&2,
EN50020:2002, EN50284:1999 and EN50281-1-1:1998,
EExia IIC T4
(-20°C <= T
a
<= +50°C) T135°C
ATEX certificate No.
BAS03ATEX0084X
The ATEX certificate and the product label carry the ATEX group and category marking:
II 1 GD
Where
signifies compliance with ATEX
II signifies suitability for use in surface mining industries
1 signifies suitability for use in a zone 0 area
G signifies suitability for use in the presence of gases
D signifies suitability for use in the presence of dust
11/07 © MEDC 2003