Thermo Scientific SOLA II Flare User Manual page 150

Appendix F
The X-Purge System
For T3 or T4 ratings, a bottled air backup source supplies air for purging the
instrument in the event that instrument air pressure is lost. Instruments with a
T3 rating must be allowed to cool for at least 45 minutes before opening the
oven door. Instruments with a T4 rating must be allowed to cool for at least
140 minutes before opening the oven door.
Caution Failure to allow adequate cooling before opening the oven can lead to
injury of personnel or damage to equipment. ▲
Note Cable glands used to supply electrical power must be IP40 rated metallic
cable glands. ▲
Note Blanking elements or plugs used shall be in accordance with national
standards. ▲
Figure F–1. Purge control unit (ATEX version shown. NFPA version has key switch inside enclosure)
Thermo Scientific SOLA II Flare User Manual F-2