4
6.5
For equipment certified for use in hazardous areas reference should be made to EN60079-17
(especially table 1) in addition to the following recommendations.
6.5.1 3
Monthly
a. Generally inspect the equipment for external damage.
b. Ensure that the spaces between the element fins remain clear and that the airflow
remains unrestricted.
6.5.2 6
Monthly
a. Isolate the electrical supply and remove the cover.
b. Internals should be clean and dry.
c. Ensure terminals are intact and secure.
d. Heating element insulation resistance to be at least 2 megohm.
e. Refit cover with new gasket or ‘o’ ring if required.
f. HFT only – check the flamepath gap as 3.7 above.
g. Earth continuity must be maintained between all points and the main structure.
6.5.2 Annually
a. Carry out 3 monthly and 6 monthly check as above.
b.
Check for element failure or low insulation resistance.
6.6
FAW and FAW-C heaters - only Heatex Ltd or its approved agent to carry out heating
element replacement otherwise the Hazardous Area certification will be invalidated.
6.7
If heaters are being left unused for a period greater than 3 months, carry out 6 monthly
maintenance before energising.
7.0 MARKING
7.1
FAW, FAW-C and FCR
II 2 G
EEx e II T(2, 3 or 4 depending on model)
7.2 HFT
II 2 G/D
EEx d IIC T6 IP6X T85ºC
