VAC D500, Manual

Page: 7 / 89

7
Operation with flammable gases
Observe the following points when operating a device with
flammable gases:
• The device must be used in accordance with the
specifications in the relevant certificate.
• Only the design with the ‘Intrinsic Safety’ type of
protection may be used for operation with natural gas.
The pneumatic outputs must be vented in non-Ex areas.
• The maximum ambient temperature may not up-scale
60 °C (140 °F).
• During operation with flammable gases in type of
protection ‘Ex n’, the device may only be operated with
approved cable glands.
• During operation with flammable gases, the cover cap for
the air outlets can be removed, and the air outlets can be
tubed separately. Both pipes must not be joined in one
pipe.
Operation in areas with combustible dust
Observe the following points when operating a device with
combustible dust:
• To prevent loss of type of protection, the housing must
not be opened.
• Only use cable glands which are approved for the type of
protection and correspond to IP rating â IP 6X.
• Danger due to propagating brush discharge must be
avoided.
Operation in temperature class T6
During operation in temperature class T6, when the equipment
is partially or fully depressurized, ensure that there is no
possibility of a hazardous atmosphere getting into the
pneumatic system or that any hazardous atmosphere is
removed prior to compression by taking suitable action.
When commissioning in temperature class T6, flush the
pneumatic system by applying 1.4 (+/- 0.1) bar until all traces of
any explosive mixture have been removed, yet for at least
5 minutes. Ventilate and evacuate the EDP300 fully several times.
ATEX and IECEx temperature data
Type of protection Ex i, intrinsic safety
Temperature
class Ambient temperature Surface temperature
T4 Æ 40 to 85 °C ( Æ 40 to 185 °F) 100 °C (212 °F)
T6 Æ 40 to 40 °C ( Æ 40 to 104 °F) 55° C (131 °F)
Type of protection Ex n - non-sparking
Temperature
class Ambient temperature Surface temperature
T4 Æ 40 to 80 °C ( Æ 40 to 176 °F) 100 °C (212 °F)
T6 Æ 40 to 40 °C ( Æ 40 to 104 °F) 55° C (131 °F)