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NOTE: R454C is classified as A2L (mildly flammable) refrigerant, while R290 is classified as
A3 (flammable) refrigerant.
Oil recharge values can be taken from the compressor nameplate or from Copeland Select software
available at www.climate.emerson.com/en-gb.
2.5.2 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.
2.5.3 PED category and maximum allowable pressure PS
The pressure PS is the maximum allowable pressure at the low- and high-pressure sides of the
compressor. The maximum pressure value PS for the individual compressor type is printed on the
nameplate of the compressor. Safety is established in compliance with the relevant standards
applicable to the given product.
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.
Additionally, a distinction must be made between refrigerants of fluid group 1 (flammable) and fluid
group 2 (non-flammable). YRH(V)*KTE compressors can be operated with R454C (A2L refrigerant)
and YRH(V)*KTG compressors can be operated with R290 (A3 refrigerant). Both refrigerants belong
to fluid group 1.
YRH(V)*KTE/KTG horizontal scroll compressors are PED class II.
Compressor
YRH(V)72KTE &
YRH(V)81KTE
YRH(V)72KTG &
YRH(V)81KTG
Table 4: Maximum allowable pressures and PED category
AGL_AC_ST_YRH_EN_Rev01
PS
Low-pressure
High-pressure
side
side
20 bar(g)
32 bar(g)
20 bar(g)
32 bar(g)
PS
TS max.
Low-pressure
side
50 °C
50 °C
Fluid
PED
group
class
1
II
1
II
5
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