Danfoss Maneurop NTZ048 Application Guidelines

Application guidelines
15FRCC.PC.002.A4.22
Operating conditions
Operating envelope
R404A / R507
Discharge temperature
protection
Even when the motor windings are protected
against overheating by the internal motor protec-
tion, the compressor discharge gas temperature
could exceed the maximum allowed value of
275°F when the compressor is operated outside
its application envelope. The most eective
protection against too high discharge gas tem-
perature is to mount a discharge gas thermostat.
An accessory kit is available from Danfoss which
includes the thermostat, mounting bracket and
insulation. The thermostat must be attached to
the discharge line as indicated below at no more
than 5.9 inch from the discharge connection.
Refrigerants and
lubricants
Because of their thermodynamic properties,
R404A and R507 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 how-
ever, this small glide may be neglected. R507 is
an azeotropic mixture without temperature glide.
Maneurop® NTZ compressors are designed and
optimised for refrigerants R404A and R507.
The use of hydrocarbons is not authorised in NTZ
compressors.
Only approved refrigerants and lubricants as
listed in below table may be used.
80
85
90
95
100
105
110
115
120
125
130
135
140
145
-55-50 -45-40 -35-30 -25-20 -15-10 -5 0510 15 20
Condensing temperature (°F)
Evaporating temperature (°F)
S.H. = 20°F
2 cyl
RGT 68°F
S.H. = 20°F
1 & 4 cyl
Thermostat
Insulation
Bracket
Discharge line
Refrigerant Type* ODP**
Temp.glide***
(°F)
Lubricant
R404A
HFC 0
1.3
160Z polyolester
lubricant, factory charged (160SZ allowed
alternatively)
R507 0
*Type: HFC: Hydrouorcarbon (no chlorine component, "long-term" zero-ODP alternative)
**ODP: Ozone Depletion Potential (base R11; ODP = 1)
*** Temperature glide: dierence between saturated vapor temperature and saturated liquid temperature at constant
pressure

Danfoss Maneurop NTZ048 Specifications

General

Brand	Danfoss
Model	Maneurop NTZ048
Category	Air Compressor
Language	English