DB-309-3
13
1
Introduction
This supplement to the Operating Instructions DB-300
is limited to the special features of these oil separators
concerning their use in potentially explosive atmo-
spheres (oil separator in a special explosion-proof
design). In addition to this, the Operating Instructions
DB-300 are also applicable.
Using these oil separators in potentially explosive at-
mospheres is only allowed in combination with screw
compressors OS.(A)74-EX. For this reason, the
BITZER Operating Instructions SB-500 and SB-509
must also be adhered to.
According to the EU Machinery Directive 2006/42/EC
and the EU Pressure Equipment Directive 2014/68/EU,
these oil separators are designed for installation in refri-
geration systems located in areas that are subject to
the EU Explosion Protection Directive 2014/34/EU
(ATEX 114).
They may only be put into operation if they have been
installed according to the standard Operating Instruc-
tions DB-300, this supplement and the Operating In-
structions for screw compressors SB-500 and SB-509
and if the overall system complies with the applicable
legal provisions (applied standards: see declaration of
incorporation).
The oil separators have been designed especially for
use in Zones 1 and 2 (ATEX) according to the EU Dir-
ective 1999/92/EC (ATEX 137) and comply with the re-
quirements of ATEX marking Ex II 2G Ex h IIB T4 Gb X
and Ex II 2G Ex h IIC T4 Gb X, respectively. They have
been built in accordance with state-of-the-art methods
and current regulations. Particular importance has been
placed on user safety.
The Ex-relevant information (zones, explosion group,
temperature class, etc.) must be defined by the end
user and specified in the explosion protection docu-
ment.
Before commissioning the system, the end user must
have the complete system setup assessed and accep-
ted by a notified body.
These Operating Instructions, the EU Declarations of
Conformity (where applicable, type examination certific-
ates) and the manufacturer's documentation of the
components used must be kept available in the vicinity
of the refrigeration system during the entire lifetime of
the compressor.
1.1
Also observe the following technical
documents
• DB-300 Operating Instructions for pressure vessels:
Liquid receivers and oil separators
• SB-509 Operating Instructions for open drive screw
compressors in a special Ex design
• DP-500 Brochure for oil separator
• DW-100 Maintenance Instructions for tightening
torques for pressure vessels
See www.bitzer.de
• Manufacturer's documentation of the individual com-
ponents included in the scope of delivery
2
Safety
2.1
Authorized staff
Any work on oil separators and refrigeration systems
may only be performed by qualified and authorised staff
who have been instructed especially in the area of ex-
plosion protection. The local regulations and guidelines
will apply with respect to the qualification and expertise
of the specialists.
2.2
Residual risks and general safety references
see DB-300
