DB-309-3
15
3
Application ranges
Refrigerant
• HFC refrigerants R404A, R507A, R134a
• HCFC refrigerants R22
• NH
3
(specific NH
3
design OA1954A-EX, OA4188A-
EX, OA9111A-EX, OA14111A-EX, OA25112A-EX)
Oil
• For HFC refrigerants: Polyolester oil BSE170
• For R22: Alkylbenzene oil B100, complex ester oil
B150SH
• For R717/NH
3
: KC68 (MO), SHC226E (PAO)
Use of other lubricants upon request.
3.1
Name plate
The specific pressure vessel design for use in Zones 1
and 2 according to the ATEX marking Ex II 2G Ex h IIB
T4 Gb X and Ex II 2G Ex h IIC T4 Gb X, respectively, is
marked by adding "EX" to the model designation.
Fig. 2: ATEX name plate (example)
3.2
ATEX marking
Ex II 2G Ex h IIC T4 Gb X
Ex
Directive 2014/34/EU
II
Device group
2
Device category
G
Gas
h
Ignition protection type non-electrical
device
IIC
Gas group
T4
Temperature class 135°C
Gb
Equipment Protection Level
X
Specific operating conditions
For pressure vessels with standard varnish and navy
varnish without warning label concerning electrostatics,
the following marking is used:
Ex II 2G Ex h IIB T4 Gb X
For pressure vessels with standard varnish and navy
varnish without warning label concerning electrostatics
or when using an electrically conductive varnish, the
following marking is used:
Ex II 2G Ex h IIC T4 Gb X
3.3
Defining the zone
Before mounting, the zone of the potentially explosive
atmosphere must be defined by the end user and spe-
cified in the explosion protection document. The suitab-
ility of the defined zone must be assessed.
DANGER
Risk of explosion caused by electrostatic dis-
charge!
If the compressors or pressure vessels are used
in gas group IIC, they are only allowed to be
touched in the shut-off state and in an atmo-
sphere subjected to a clearance measurement.
Never perform work in a potentially explosive at-
mosphere.
This applies to standard and navy varnishes.
