Operating conditions
Model
Refrigerant
Type
(1)
GWP
(2)
Temp.glide
(3)
(K)
Lubricant
NTZ
R404A
HFC
3922
0.7/0.3
175PZ POE charged
R507A
HFC
3985
0/0
R452A
HFC+HFO
2141
3.9/3.7
R454C
(4)
HFO
146
6
R455A
(4)
HFO
145
12
(1)
Type: HFC: Hydrofluorcarbon (no chlorine component, "long-term" zero-ODP alternative)
(2)
GWP: Global Warning Potential
(3)
Temperature glide: difference between saturated vapor temperature and saturated liquid temperature at constant pressure
(4)
Only 1 cylinder compressor with voltage code 4 and 5
RGT 20°C
SH10K 2 cyl
SH10K 1 & 4 cyl
RGT 20°C
SH = 10K
RGT 20°C
SH10K
Operating envelope
Refrigerants and lubri-
cants
Because of their thermodynamic properties,
R404A and R507A are especially suitable for low
and medium temperature applications. Danfoss
recommends the use of these refrigerants with
NTZ compressors. Note that R404A has a small
temperature glide. It must therefore be charged
in the liquid phase. For most other aspects
however, this small glide may be neglected.
R507A is an azeotropic mixture without
temperature glide.
Because of its thermodynamic properties R452A
is suitable for low temperature applications.
R452A has a medium glide of 4K and must
therefore to be charged in the liquid phase.
R
Maneurop® NTZ compressors are designed
and optimised for refrigerants R404A / R507A /
R452A / R454C.
The use of hydrocarbons is not authorised in NTZ
compressors.
Only approved refrigerants and lubricants as
listed in below table may be used.
R404A / R507A
R452A
R
The operating envelopes for NTZ
compressors are given in the figures below and
guarantees reliable operations of the compressor
for steady-state operation.
AB245486497018en-000601
18
Application Guidelines
