In a Danfoss SH scroll compressor, the
compression is performed by two scroll elements
located in the upper part of the compressor.
Suction gas enters the compressor at the suction
connection. As all of the gas ows around and
through the electrical motor, thus ensuring
complete motor cooling in all applications, oil
droplets separate and fall into the oil sump.
After exiting the electrical motor, the gas enters
the scroll elements where compression takes
place. Ultimately, the discharge gas leaves the
compressor at the discharge connection.
The gure below illustrates the entire
compression process. The centre of the orbiting
scroll (in grey) traces a circular path around
the centre of the xed scroll (in black). This
movement creates symmetrical compression
pockets between the two scroll elements.
Low-pressure suction gas is trapped within
each crescent-shaped pocket as it gets formed;
continuous motion of the orbiting scroll serves
to seal the pocket, which decreases in volume
as the pocket moves towards the centre of the
scroll set increasing the gas pressure. Maximum
compression is achieved once a pocket reaches
the centre where the discharge port is located;
this stage occurs after three complete orbits.
Compression is a continuous process: the
scroll movement is suction, compression and
discharge all at the same time.
SUCTION
COMPRESSION
DISCHARGE
4
FRCC.PC .007.B8.02
Application guidelines
Features
SH range is composed of SH090-105-120140-161-184 (light commercial platform) and
SH180-240-295-300-380-485 (large commercial
platform).
The SH090-105-120-140-161-184 compressors
bene t from a further improved design to
achieve the highest e ciency.
• Gas circulation, motor cooling and oil
behaviour are improved on light commercial
platform models by a new patented motor cap
design.
• Part protection and assembly reduces internal
leaks and increases life durability.
Heat shield that lowers the heat
transfer between discharge and
suction gas and the acoustic level
• Improved part isolation reduces greatly
acoustic levels.
• Gas intake design induces higher resistance to
liquid slugging.
The SH485 compressors include additional
features for enhanced protection and e ciency:
• integrated discharge gas temperature
protection,
• intermediate discharge valves for higher
seasonal e ciency.
• patented gas path ow.
Integrated discharge gas
temperature protection (SH485)
New PTFE spring seal for even
lower leaks
Intermediate discharge valves
(SH485)
R410A optimized and dedicated
scroll pro le
Patented motor cap
Liquid slug protection per suction
tting in upper position
Danfoss SH scroll compressors for R410A are
available as single compressors. The example
below presents the compressor nomenclature
which equals the technical reference as shown on
the compressor nameplate.
Displacement at nominal speed: 2900 rpm at 50 Hz, 3500 rpm at 60 Hz
Net weight with oil charge
TR: Ton of Refrigeration, Standard rating conditions: ARI standard Evaporating temperature: 7.2 °C Superheat: 11.1 K
EER: Energy E ciency Ratio Refrigerant: R410A Condensing temperature: 54.4 °C Subcooling: 8.3 K
COP: Co e cient Of Performance,
Subject to modi cation without prior noti cation.
For full data details and capacity tables refer to Online Datasheet Generator: ww w.danfoss.com/odsg
with a sight glass (1"1/8 - 18 UNF) which may be
used to determine the amount and condition of
the oil contained within the sump.
Oil equalisation connection
SH090-105-120-140-161-184: 1"3/4 rotolock
connector allowing use of 1”3/4 - 7/8" or 1”3/4 1”1/8 sleeve.
SH180-240-295-300-380-485: 2”1/4 rotolock
connector allowing the use of 2”1/4 - 1”3
/8 or
2”1/4 - 1”5/8 sleeve.
This connection must be used to mount an oil
equalisation line when two or more compressors
are mounted in parallel (please refer to Danfoss
SH Parallel Application Guide l ines FRCC.
EC.008.
fordetails).
Oil drain connection
The oil drain connection allows oil to be
removed from the sump for changing, testing,
etc. The tting contains an extension tube into
the oil sump to more e ectively remove the
oil. The connection is a
female 1/4" are tting
incorporating a schrader valve and is mounted on
SH180 - 240 - 295 - 300 - 380 - 485 models only.
Oil ll
connection
and gauge
port
Oil drain
connection
Schrader
Theoil ll connection and gauge port is a 1/4"
le areconnectorincorporatingaschrader
ma
valve.
FRCC.PC.007.B8.02
13
Application guidelines
Electrical data, connections and wiring
Motor voltage
Wiring connections
SH090-105-120-140-161
ExceptSH140-161 code3
DanfossSH scroll compressorsareavailablein ve di erentmotor voltagesas listedbelow.
Motor voltage codeCode 3Code 4Code 6Code 7Code 9
Nominal voltage-
50 Hz
Voltage range-
Nominal voltage200-230V - 3 ph460
60 Hz
Voltagerange180-253 V414-506 V-517-632 V342-418 V
*SH295& 485
Electrical power is connected to the compressor
terminals by Ø 4.8 mm (3/16”) screws.
Theterminal boxisprovidedwithaØ25.5mm
380-400V - 3 ph
380-415V - 3 ph *
340-440 V
340-457V *
V - 3 ph-575 V-3 ph380V- 3 ph
230V - 3 ph500V - 3 ph-
207-253 V450 - 550 V-
The maximum tightening torque is 3 Nm. Use a
ring terminal on the power leads.
1/4’’
Terminal box
(ISO25)andaØ29mm (PG21) knockouts.
Ø 25.5 mm knockout
Ø 29 mm knockout
SH140&161 code 3 & SH184
SH180
The terminal box is provided with a
Ø40.5 mm hole (ISO40) for power supply and
a
Ø16.5 mm knockout (ISO16).
The terminal box is provided with 2 triple
knockouts and 1 single knockout for power
supply and 4 double knockouts for the safety
control circuit.
The motor protection module comes preinstalled within the terminal box and has
pre-wired thermistor connections. The module
must be connected to a power supply of the
appropriate voltage. The module terminals are
6.3mmsize.
Theterminal boxis
providedwith2triple
knockouts and 1 single knockout for power
supply and 4 double knockouts for the safety
control circuit.
within the terminal box. Phase sequence
protection connections and thermistor
connections are pre-wired. The module must be
connected to a power supply of the appropriate
vo
ltage. Themoduleterminalsare 6.3-mmsize
Fastontype.
L1 L2 L3
Black Blue Brown
L N S1 S2 M1 M2
Modulepower
Internal control contac t
Safety
Thermistor
connection
circuit
The compressor terminal box according to IEC529 is IP54 for all models when correctly sized IP54 rated
cable glands are used.
First numeral, level of protection against contact and foreign objects
5 - Dust protected
Second numeral, level of protection against water
4 - Protection
Thetemperatureinsidetheterminal boxmay not
exceed 70°C. Consequently, if the compressor is
installed in an enclosure, precautions must be
taken to avoid that the
compressor and in the terminal box would rise
too much. The installation of ventilation on the
againstwatersplashing
temperaturearoundthe
electronic protection module may not operate
properly. Any compressor damage rel
ated to this
will not be covered by Danfoss warranty. In the
same manner, cables must be selected in a way
to insure that terminal box temperature does not
exceed 70°C.