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The ATEX marking for applications in gas explosive atmosphere Zone 2 locations is as follows:
▪ ATEX Directive 94/9/EC part: II 3G
▪ Standard part (EN 60079-0, EN 60079-15): Ex nA IIA T2
The Declaration of Conformity is available from the manufacturer upon request.
2.4
Application range
2.4.1 Qualified refrigerant and oil
Compressors
Qualified and approved
refrigerant
Qualified oil (factory charged)
Servicing oil
Table 3: Qualified refrigerant and oil
Oil recharge values can be taken from the compressor nameplate or from Copeland Select software
available at www.climate.emerson.com/en-gb/tools-resources.
2.4.2 Application limits
CAUTION
Inadequate lubrication! Compressor breakdown! The superheat at the
compressor suction inlet must always be sufficient to ensure that no refrigerant
droplets enter the compressor. For a typical evaporator-expansion valve
configuration a minimum stable superheat of at least 10 K is required.
For application envelopes and technical data, please refer to Copeland Select software available at
www.climate.emerson.com/en-gb/tools-resources.
2.4.3 PED category and maximum allowable pressure PS
The nameplate of the compressor contains information about the maximum allowable pressure PS,
the minimum and maximum allowed temperature TS, the internal free volume and the fluid groups
of the refrigerants qualified for the compressor model range. Values are given for the two existing
pressure ranges on low- and high-pressure sides.
The PED category is assigned according to the Pressure Equipment Directive PED 2014/68/EU.
Requirements apply to the relevant pressure levels in the compressor when the product of "pressure
relative to the environment" by "related internal free volume" (P x V) exceeds given limits. When
calculating the PED category, the high- and low-pressure sides have to be calculated separately.
The highest of the calculation results is considered.
PS
Compressor
Low-pressure
side
ZB12KCU
17 bar(g)
ZB17KCU
17 bar(g)
ZB20KCU
17 bar(g)
ZB25KCU
17 bar(g)
ZB31KCU
17 bar(g)
ZB37KCU
17 bar(g)
ZB49KCU
17 bar(g)
Table 4: Maximum allowable pressures, temperatures and internal free volumes
Additionally, a distinction must be made between refrigerants of fluid group 1 (flammable) and fluid
group 2 (non-flammable). The ZB*KCU compressors covered in these guidelines are released for
use with R290 which belongs to fluid group 1.
Compressor range
ZB12KCU to ZB49KCU
Table 5: PED category based on refrigerant and fluid group
4
ZB12KCU to ZB49KCU
R290
POE Hatcol 4467 (Ident Number 8410785)
POE Hatcol 4467 (Ident Number 8410785)
PS
TS max.
High-pressure
Low-pressure
side
side
28 bar(g)
50 °C
28 bar(g)
50 °C
28 bar(g)
50 °C
28 bar(g)
50 °C
28 bar(g)
50 °C
28 bar(g)
50 °C
28 bar(g)
50 °C
Refrigerant
R290
Internal free
volume
LP side (litres)
4.1
4.2
4.3
6.4
6.4
6.4
6.4
Fluid group
PED category
1
II
AGL_Ref_ST_ZBKCU_EN_Rev01
Internal free
volume
HP side (litres)
0.5
0.5
0.5
0.6
0.6
0.6
0.6
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