F870S
2 Pressurized enclosure system F870S
Page 12
Gönnheimer Elektronic GmbH
Tel.: +49 (6321) 49919-0
Fax: +49 (6321) 49919-41
2.6
Features in operation zone 21 (Dust)
2.6.1 Purging period -> cleaning period: cleaning the housing inside
In zone 21 the housing must not be purged in comparison to the operation in gas zone 1.
The operator has to insert the purging volume zero “0 [l]” into the parameter menu.
Purging in the presence of combustible dust would generate a dangerous explosive atmos-
phere inside the cabinet.
In the zone 21 the purging period is replaced by a cleaning period, viz. the operator has to
remove thoroughly the combustible dust inside before he is energizing the electrical parts
inside the cabinet.
After cleaning the pressure inside of the cabinet prevent an infiltration of dust.
2.6.2 Additional marking
The cabinet must contain a well viewable sign with the following content:
„WARNING: REMOVE ALL DUST FROM THE INSIDE OF THE ENCLOSURE BEFORE
CONNECTING OR RESTORING THE ELECTRICAL SUPPLY“
On Ex p cabinets suitable for zone 21, which can be opened without tools, has to be placed
the following mark:
„WARNING: DO NOT OPEN WHILE ENERGIZED UNLESS IT IS OBVIOUS THAT NO
COMBUSTIBLE DUST IS PRESENT“
2.7
Additional information: EC- type certificate F850-SYST
Gönnheimer features as manufacturer of Ex p- Systems a comprehensive ATEX Ex p-
SYSTEM Certification of a notified body.
Provides a economical solution for small quantities
•
certified for Ex- Zone 1
•
enhanced for Dust- Ex, Zone 21 (category 2D)
•
the first ATEX certification of this type in Europe
•
matches > 80% of all individual customer systems
•
enhanced pressure ranges: 27mbar, 350mbar and 1 bar.
Costumer advantages:
+ usual delivery time, + usual q usual costs,+ no additional efforts
2.8 Conformity
with
standards
The explosion proof control unit FS870S meets requirements of listed standards in the at-
tachment (Declaration of conformity). They were developed, manufactured and tested in
accordance with state-of-the-art engineering practice and ISO9001:2008.
Summary of Contents for F870S
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