Danfoss Performer SH090 Instruction Manual

www.danfoss.com
Application guidelines
Danfoss scroll compressors
SH090 to SH485 - single
50 Hz - 60 Hz - R410A
MAKING MODERN LIVING POSSIBLE

3
FRCC.PC.007.B8.02
Application guidelines Content
Scroll compression principle ........................................... 4
Features............................................................................. 5
Compressor model designation ...................................... 6
Nomenclature...............................................................................................6
Technical specications ................................................... 7
50-60 Hz data................................................................................................7
Dimensions ....................................................................... 8
SH090-105-120-140* & 161* ..................................................................8
SH 140 & 161 code 3 & SH184.................................................................9
SH180-240-295..........................................................................................10
SH300............................................................................................................11
SH380-485...................................................................................................12
Connection details...................................................................................13
Electrical data, connections and wiring........................ 14
Motor voltage............................................................................................14
Wiring connections ................................................................................. 14
IP rating........................................................................................................15
Terminal box temperature ....................................................................15
Three phase electrical characteristics...............................................16
Danfoss MCI soft-start controller........................................................17
General wiring information..................................................................18
Motor protection...................................................................................... 20
Voltage imbalance...................................................................................21
Approval and certications ........................................... 22
Approvals and certicates.....................................................................22
Pressure Equipment ................................................................................ 22
Low voltage directive .............................................................................22
Machines directive...................................................................................22
Internal free volume................................................................................22
Operating conditions ..................................................... 23
Refrigerant and lubricants ....................................................................23
Motor supply..............................................................................................24
Compressor ambient temperature....................................................24
Application envelope .............................................................................24
Discharge temperature protection ...................................................25
High and low pressure protection .....................................................25
Cycle rate limit...........................................................................................26
System design recommendations................................. 27
General.........................................................................................................27
Essential piping design considerations............................................ 27
Refrigerant charge limit.........................................................................28
O-cycle migration..................................................................................29
Liquid ood back......................................................................................31
Specic application recommendations ........................ 32
Low ambient application ......................................................................32
Low load operation .................................................................................33
Brazed plate heat exchangers .............................................................33
Electronic expansion valve ...................................................................33
Reversible heat pump systems............................................................33
Water utilizing systems ..........................................................................35
Sound and vibration management............................... 36
Starting sound level ................................................................................36
Running sound level ...............................................................................36
Stopping sound level..............................................................................36
Sound generation in a system.............................................................36
Installation ...................................................................... 38
Compressor handling and storage....................................................38
Compressor mounting...........................................................................38
Compressor holding charge.................................................................39
System cleanliness...................................................................................40
Tubing ..........................................................................................................40
Brazing and soldering.............................................................................40
System pressure test ...............................................................................41
Leak detection...........................................................................................42
Vacuum evacuation and moisture removal....................................42
Filter driers..................................................................................................42
Refrigerant charging...............................................................................43
Insulation resistance and dielectric strength.................................43
Commissioning......................................................................................... 43
Oil level checking and top-up .............................................................43
Ordering information and packaging........................... 44
Packaging....................................................................................................44
Ordering information..............................................................................45
Accessories...................................................................... 47

4FRCC.PC.007.B8.02
Application guidelines
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.
Scroll compression principle
SUCTION
COMPRESSION
DISCHARGE

5
FRCC.PC.007.B8.02
Application guidelines
SH range is composed of SH090-105-120-
140-161-184 (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.
• 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.
Features
SH180-240-295-300-380-485SH090-105-120-140-161-184
Heat shield that lowers the heat
transfer between discharge and
suction gas and the acoustic level
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
Patented gas path ow (SH485)
Patented motor centring spacer
Improved lower bearing centring

6FRCC.PC.007.B8.02
Application guidelines
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.
Code numbers for ordering are listed section
"Ordering information and packaging".
For tandem and trio assemblies, please refer
to the Danfoss SH scroll compressor Parallel
Application Guidelines, FRCC.EC.008.
Nomenclature
Compressor model designation
* for SH485 only. For further information refer to application guidelines FRCC.PC.027.
Family, lubricant
& refrigerant
SH: Scroll, POE lubricant,
for R410A Motor protection
L: Internal overload protector
A: Electronic, 24V AC
B: Electronic, SH180: 230V
SH240-300-380-485: 115/230V
C: Customized electrical box
J: Operating control system 24V AC*
K: Operating control system 230V AC*
Suction and discharge connections
A: Brazed connections
Family,
lubricant
& refrigerant
Nominal
capacity Approvals Voltage Version Evolution index
Evolution index
A~Z
A4SHAAB485
Motor voltage code
3: 200-230V/3~/60 Hz
4: 380-400V/3~/50 Hz - 460V/3~/60 Hz
for SH295 & SH485: 380-415V/3~/50Hz - 460V/3~/60Hz
6: 230V/3~/50 Hz
7: 500V/3~/50 Hz - 575V/3~/60 Hz
9: 380V/3~/60 Hz
UL index
Nominal capacity
in thousand Btu/h at 60 Hz, R410A,
ARI conditions

7
FRCC.PC.007.B8.02
Application guidelines
50-60 Hz data
Technical specifications
Model
Nominal tons
60 Hz
Nominal cooling
capacity
Power
input COP E.E.R. Swept volume Displacement
Oil charge Net weight 
TR W Btu/h kW W/W Btu/h/W cm3/rev m3/h dm3 kg
50 Hz
SH090 7.5 22 300 76 100 7.19 3.10 10.59 88.40 15.40 3.0 58.0
SH105 9 26 850 91 600 8.47 3.17 10.80 103.50 18.00 3.3 64.0
SH120 10 30 000 102 200 9.46 3.17 10.80 116.90 20.30 3.3 64.0
SH140 12 34 700 118 400 10.86 3.19 10.90 133.00 23.12 3.3 67.0
SH161 13 38 800 132 400 12.15 3.19 10.90 151.70 26.40 3.3 69.0
SH184 15 44 650 152 500 13.73 3.25 11.10 170.30 29.60 3.6 71.5
SH180 15 44 500 151 800 13.73 3.21 10.95 170.20 29.60 6.7 108.0
SH240 20 60 400 206 300 18.77 3.22 11.00 227.60 39.60 6.7 108.0
SH295 25 73 200 249 800 22.50 3.25 11.10 276.2 48.10 6.7 111.0
SH300 25 75 200 256 400 23.32 3.22 11.00 285.50 49.70 6.7 153.0
SH380 30 90 400 308 700 28.19 3.21 10.95 345.00 60.00 7.2 159.0
SH485 40 116 300 396 900 35.75 3.25 11.10 442.60 77.00 6.7 175.0
60 Hz
SH090 7.5 27 100 92 500 8.57 3.16 10.79 88.40 18.60 3.0 58.0
SH105 9 32 100 109 500 9.96 3.22 11.00 103.50 21.80 3.3 64.0
SH120 10 36 800 125 400 11.25 3.27 11.15 116.90 24.60 3.3 64.0
SH140 12 42 300 144 300 12.94 3.27 11.15 133.00 27.90 3.3 67.0
SH161 13 47 200 160 900 14.43 3.27 11.15 151.70 31.90 3.3 69.0
SH184 15 54 000 184 400 16.45 3.28 11.20 170.30 35.80 3.6 71.5
SH180 15 54 300 185 300 16.45 3.27 11.15 170.20 35.70 6.7 108.0
SH240 20 73 500 251 000 22.48 3.27 11.15 227.60 47.80 6.7 108.0
SH295 25 88 500 302 000 27.20 3.25 11.10 276.20 58.00 6.7 111.0
SH300 25 91 300 311 500 28.19 3.24 11.05 285.50 60.00 6.7 153.0
SH380 30 109 600 374 300 34.02 3.22 11.00 345.00 72.30 7.2 159.0
SH485 40 140 600 479 600 43.28 3.25 11.10 442.60 92.90 6.7 175.0
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: Coecient Of Performance,
Subject to modication without prior notication.
For full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg

8FRCC.PC.007.B8.02
Application guidelines
SH090-105-120-140* & 161*
(* except code 3)
Dimensions
Flexible grommet
(1) 451
(2) 509
(1) 482
(2) 540
Ø 224
Ø 243
117 Oil sight glass
(1) 137
(2) 189
230
230
190.5
190.5
180
154
(1) 158
(2) 173
30°
30°
60°
4 x hole
Ø 19.05
(1) SH090
(2) SH105 - 120 - 140* & 161*
* except code 3
All dimensions in mm
Ø 22
(1) Ø 29
(2) Ø 35
(1) 235
(2) 278
(1) 94
(2) 101
(1) 94
(2) 101
Equalisation line
15 mm
HM 8 bolt
Lock washer
Flat washer
Steel mounting
sleeve
Rubber grommet
Nut

9
FRCC.PC.007.B8.02
Application guidelines
SH140 & 161 code 3 & SH184
Dimensions
Flexible grommet
Ø 243
Oil sight
glass
Ø 243
(1) 278
(2) 300
(1) 101
(2) 108
(1) 101
(2) 108
(1) 509
(2) 525
(1) 540
(2) 555
(1) 155
(2) 170
157
4 x holes
Ø19.05
230
230
190.5
190.5
173
(1) 154
(2) 159
200
30°
30°
Ø 22
Ø 35
60° (1) SH140 & 161 code 3
(2) SH184
All dimensions in mm
Equalisation
line
15 mm
HM 8 bolt
Lock washer
Flat washer
Steel mounting
sleeve
Rubber grommet
Nut

10FRCC.PC.007.B8.02
Application guidelines
SH180-240-295
Dimensions
Flexible grommetRigid spacer
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
28 mm
Compressor
base plate
Ø265.9
Discharge
1"1/8
Suction
1"5/8
Ø257.4
Ø317.5
653
618
187
301.5
214
345.4
195
170
304.8
370.8
353
212
109
183 60°
60°
428
279.4
76.6
4xrigid
spacer 29.5
4xholes Ø19
All dimensions in mm
92.5
531.5
±1.2
HM 8 bolt
Lock washer
Flat washer
Rigid spacer
Nut
29.5 mm

11
FRCC.PC.007.B8.02
Application guidelines Dimensions
SH300
Flexible grommet
Rigid spacer
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
28 mm
Compressor
base plate
HM 8 bolt
Lock washer
Flat washer
Rigid spacer
Nut
29.5 mm
Ø333.2
Ø318.1
4xholes Ø19
Discharge
1"1/8
Suction
1"5/8
492.5
±1.2
693.5
634.5
187
214
202
195 183
428
109
212
356
370.8 304.8
60°
60°
301.5
345.4
279.4
76.692.5
4xrigid spacer
All dimensions in mm

12FRCC.PC.007.B8.02
Application guidelines Dimensions
SH380-485
Flexible grommet
Rigid spacer
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
28 mm
Compressor
base plate
HM 8 bolt
Lock washer
Flat washer
Rigid spacer
Nut
29.5 mm
725.8
667
187
301.5
214
Ø333.2
Ø318.1
All dimensions in mm
Suction
1"5/8
Discharge:
SH380: 1"1/8
SH485: 1"3/8
524.8
±1.2
4 holes Ø19
76.6
345.4
279.4
202
212
356
195
109
183
60°
60°
428
304.8
370.8
92.5

13
FRCC.PC.007.B8.02
Application guidelines Dimensions
Suction and discharge
connections
Oil drain connection
Oil sight glass All Danfoss SH scroll compressors come equipped
with asight glass (1"1/8- 18UNF)which may be
used to determine the amount and condition of
the oil contained within the sump.
The oil ll connection and gauge port is a1/4"
maleare connector incorporating aschrader
valve.
SH090-105-120-140-161-184: 1"3/4 rotolock
connector allowing use of 1”3/4 - 7/8" or 1”3/4 -
1”1/8sleeve.
SH180-240-295-300-380-485: 2”1/4 rotolock
connector allowing the use of 2”1/4 - 1”3/8or
2”1/4 - 1”5/8sleeve.
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 Guidel ines FRCC.EC.008.
for details).
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 removethe
oil.The connection is afemale1/4" are tting
incorporating aschrader valveand is mounted on
SH180 - 240- 295 - 300 - 380 - 485 modelsonly.
Schrader
Oil equalisation connection
Connection details
Brazed version
Tube ODF
Brazed
SH090 Suction 1"1/8
Discharge 7/8"
SH105 -120-140-161-184 Suction 1"3/8
Discharge 7/8"
SH180-240-295-300-380 Suction 1’’ 5/8
Discharge 1’’ 1/8
SH485 Suction 1”5/8
Discharge 1”3/8
SH090 - 105 - 120 -
140 - 161 - 184
SH180 - 240 - 295 -
300 - 380 - 485
Version AL
Suction and discharge connections Brazed Brazed
Oil sight glass Threaded Threaded
Oil equalisation connection rotolock 1"3/4 rotolock 2"1/4
Oil drain connection none 1/4’’ are
Low pressure gauge port (schrader) 1/4" are 1/4’’ are
Oil ll
connection
and gauge
port
Oil drain
connection

14 FRCC.PC.007.B8.02
Application guidelines
The terminal box is provided with 2triple
knockouts and 1 singleknockoutfor power
supply and 4 doubleknockouts for the safety
control circuit.
The 3power supply knockouts accommodate the
following diameters:
• Ø50.8 mm (UL 1"1/2conduit) &Ø43.7 mm (UL
1"1/4 conduit) &Ø34.5 mm (UL 1" conduit)
• Ø40.5 mm (ISO40) &Ø32.2 mm (ISO32) &Ø
25.5 mm (ISO25)
• Ø25.5 mm (ISO25)
The 4 others knockouts are as follows:
• Ø22.5 mm (PG16)(UL 1/2")&Ø16.5 mm
(ISO16)(x2)
• 20.7 mm (ISO20 or PG13.5) (x2)
SH180
Electrical data, connections and wiring
Danfoss SH scroll compressors are availablein vedierent motor voltages as listed below.
Electrical power is connected to the compressor
terminalsby Ø4.8 mm (3/16”)screws.
The maximumtightening torqueis 3Nm. Use a
1/4’’ ring terminal on the power leads.
Motor voltage
Wiring connections
SH090-105-120-140-161
Except SH140-161 code 3
SH140&161 code 3 & SH184
The terminal box is provided with aØ25.5 mm
(ISO25) and aØ29 mm (PG21)knockouts.
The terminal box is provided with a
Ø40.5 mm hole(ISO40) for power supply and a
Ø16.5 mm knockout(ISO16).
Terminal box
Safetycircuit
Module power supply
Sump heater
Faston 1/4"tabs
Power supply
Terminal box
Ø 25.5 mm knockout
Power supply
Ø 29 mm knockout
Ø 40.5 mm hole
Ø 16.5 mm
knockout Power supply
Motor voltage code Code 3Code 4Code 6Code 7Code 9
50 Hz
Nominal voltage -380-400V - 3ph
380-415V - 3ph *230V - 3ph 500V - 3ph -
Voltage range -340-440V
340-457V *207-253 V450 - 550 V-
60Hz
Nominal voltage 200-230V - 3ph 460V - 3ph -575 V-3ph 380V- 3ph
Voltage range 180-253 V 414-506 V - 517-632 V 342-418V
*SH295 &485

15
FRCC.PC.007.B8.02
Application guidelines Electrical data, connections and wiring
The motor protection modulecomes pre-
installed within the terminal box and has
pre-wired thermistor connections. The module
must be connected to apower supply of the
appropriate voltage. The moduleterminalsare
6.3 mm size.
The terminal box is provided with 2triple
knockouts and 1 singleknockoutfor power
supply and 4 doubleknockouts for the safety
control circuit.
The 3power supply knockouts accommodate the
following diameters:
• Ø50.8 mm (UL 1"1/2conduit) &Ø43.7 mm (UL
1"1/4 conduit) &Ø34.5 mm (UL 1" conduit)
• Ø40.5 mm (ISO40) &Ø32.2 mm (ISO32) &Ø
25.5 mm (ISO25)
• Ø25.5 mm (ISO25)
The 4 others knockouts are as follows:
• Ø22.5 mm (PG16)(UL 1/2")&Ø16.5 mm
(ISO16)(x2)
• 20.7 mm (ISO20 or PG13.5) (x2)
SH240-295-300-380-485
The motor protection modulecomes preinstalled
within the terminal box. Phase sequence
protection connections and thermistor
connections are pre-wired. The modulemust be
connected to apower supply of the appropriate
voltage. The moduleterminalsare 6.3-mm size
Faston type.
The temperature inside the terminal box may not
exceed 70°C.Consequently, if the compressor is
installed in an enclosure, precautions must be
taken to avoid that the temperature around the
compressor and in the terminal box wouldrise
too much. The installation of ventilation on the
enclosure panelsmay be necessary.If not, the
electronic protection modulemay not operate
properly.Any compressor damage related to this
will not be covered by Danfoss warranty.Inthe
same manner, cables must be selected in away
to insure that terminal box temperature does not
exceed 70°C.
Terminal box
temperature
IPrating The compressor terminal box according to IEC529 is IP54 for all modelswhen correctly sized IP54 rated
cableglands are used.
First numeral, level of protection against contact and foreign objects
5- Dust protected
Second numeral, level of protection against water
4- Protection against water splashing
LN1 2 1412 11
Internal control contact
Safety
circuit
Thermistor
connection
Modulepower
L N S1 S2 M1 M2
L1 L2 L3
Black Blue Brown
Phase sequence input
Internal control contact
Safety
circuit
Thermistor
connection
Modulepower
Black Blue
Brown
M1 - M2
Control circuit
Faston 1/4” tabs
Power supply
Sump heater
Module
power supply
}
}

16 FRCC.PC.007.B8.02
Application guidelines Electrical data, connections and wiring
Three phase electrical
characteristics
The MCC is the current at which the motor
protection trips under maximumload and
low voltage conditions. This MCC valueis the
maximumat which the compressor can be
operated in transient conditions and outof
the application envelope. Abovethis value, the
internal motor protection or external electronic
modulewill cut-outthe compressor to protect
the motor.
Locked Rotor Amp valueis the higher average
current as measured on mechanically blocked
compressor tested under nominal voltage. The
LRA valuecan be used as rough estimation for
the starting current. However in most cases, the
real starting current will be lower. Asoftstarter
can be applied to reduce starting current.
MCC (Maximum Continuous
Current)
LRA (Locked Rotor Amp)
Compressor modelLRA MCC Max. operating current Winding resistance
AAAΩ
Motor voltage code 3
200-230V / 3ph / 60Hz
SH090 203 43 38 0.39
SH105 26746 45 0.27
SH120 26761 48 0.27
SH14030464 560.24
SH161 3156964 0.22
SH18435175 710.22
SH180 320 78 710.19
SH240485 105 103 0.16
SH295 560128 1120.13
SH300 560132 125 0.13
Motor voltage code 4
380-400 V / 3ph / 50 Hz *
460V / 3ph / 60hZ
SH090 98 20 191.47
SH105 14225 221.05
SH120 14229 241.05
SH140147 30 28 0.92
SH161 158 33 310.83
SH184197 38.6360.83
SH180 170 38 340.8
SH24021551490.62
SH295 26062560.52
SH300 26065580.48
SH380 320 79 72 0.42
SH485 413 90 89 0.23
Motor voltage
code 6
230 V / 3ph /
50 Hz
SH090 157 40 32 0.5
SH105 223 43 38 0.35
SH120 223 51410.35
SH14023653 49 0.31
SH161 23657 53 0.31
SH18423657 560.31
Motor voltage code 7
500 V / 3ph / 50 Hz
575 V / 3ph / 60Hz
SH090 841814 2.34
SH105 103 22 171.57
SH120 103 24191.57
SH140122 2622 1.38
SH161 13629 241.32
SH184135 35 28 1.32
SH180 135 30 28 1.20
SH240175 41 38 0.94
SH295 2104544 0.82
SH300 21053 48 0.82
SH380 235 60 55 0.56
Motor voltage code 9
380 V / 3ph / 60Hz
SH090 1242623 1.05
SH105 16030 260.72
SH120 160 35 29 0.72
SH14016837 330.62
SH161 177 41 37 0.57
SH184239 51410.57
SH180 21046 44 0.52
SH24026060580.42
SH295 31072 69 0.36
SH300 310 85 72 0.36
SH380 360 90 85 0.24
SH485 491 111 1060.16
*380-415V/3ph/50Hz for SH295 and SH485

17
FRCC.PC.007.B8.02
Application guidelines Electrical data, connections and wiring
Winding resistance is the resistance between
phases at 25°C (resistance value+/- 7%).
Winding resistance is generally low and it
requires adapted toolsfor precise measurement.
Use adigital ohm-meter, a"4 wires" method and
measure under stabilised ambient temperature.
Winding resistance varies strongly with winding
temperature; if the compressor is stabilised
at adierent valuethan 25°C, the measured
resistance must be corrected with following
formula:
a+ tamb
Rtamb = R25°C_______
a+ t25°C
t25°C: reference temperature = 25°C
tamb: temperature during measurement (°C)
R25°C: winding resistance at 25°C
Ramb: winding resistance at tamb
Coecient a= 234.5
The max. operating current is the current when
the compressor operates at maximumload
conditions and 10% below nominal voltage
(+15°C evaporating temperature and +68°C
condensing temperature).
Max Oper. Acan be used to select cables and
contactors.
Innormal operation, the compressor current
consumption is alwaysless than the Max Oper. A.
value.
Winding resistance
Max. operating Current
The inrush current for the Danfoss SH scroll
compressors with motor code 4 (400V /3ph /
50Hz or 460V / 3ph / 60Hz)can be reduced using
the Danfoss digitally-controlled MCI compressor
softstarter. MCI softstarters are designed
to reduce the starting current of 3-phase AC
motors; they can reduce the inrush current by
upto 40%, thereby eliminating the detrimental
eects of high starting torquesurges and costly
demand charges from the resultant current
spike. Upon starting, the controller gradually
increases the voltage supplied to the motor until
full-line voltage has been reached. All settings,
such as ramp-uptime (less than 0.5 sec) and
initial torque, are preset and do not require
modication.
Danfoss MCI
soft-start controller
When the control voltage is applied to A1 - A2,
the MCI softstarter will start the motor, according
to the settings of the ramp-uptime and initial
torqueadjustments. When the control voltage
is switched OFF, the motor will switch o
instantaneously.
Input controlled soft start
Compressor modelSoftstart reference
Ambient max. 40°C
Softstart reference
Ambient max. 55°C
SH090 MCI15CMCI15C
SH105 MCI25CMCI25C
SH120 MCI25CMCI25C
SH140MCI25CMCI25C *
SH161 MCI25CMCI25C *
SH184MCI25CMCI25C *
SH180 MCI50CMMCI50CM
SH240MCI50CMMCI50CM*
SH295 MCI50CM*MCI50CM*
SH300 MCI50CM*MCI50CM*
SH380 MCI50CM*MCI50CM*
SH485 NA NA
*by-pass contactor K1 is required

18FRCC.PC.007.B8.02
Application guidelines
Suggested wiring diagrams logic
Compressor model SH 090 - 105 - 120 - 140- 161 - 184
Electrical data, connections and wiring
By means of the built-in auxiliary contact (23-24)
the by-pass function is easily achieved, see wiring
diagram beside.
No heat is generated from the MCI.As the
contactor alwaysswitches in no-load condition
it can be selected on the basis of the thermal
current (AC-1).
13-14 contact not applicablewith MCI 25C.
MCI with by-pass contactor
General wiring
information
The wiring diagrams below are examples for a
safeand reliablecompressor wiring. Incase an
alternativewiring logic is chosen, it is imperative
to respect the following rules:
When asafety switch trips, the compressor must
stop immediately and must not re-start until
the tripping condition is back to normal and
the safety switch is closed again. This applies to
the LP safety switch, the HP safety switch, the
discharge gas thermostat and the motor safety
thermostat.
Inspecicsituations, such as winter start
operation, an eventual LP control for pump-
down cycles may be temporarily bypassed to
allow the system to buildpressure. Butit remains
mandatory for compressor protection to apply an
LP safety switch. The LP safety switch must never
be bypassed.
Pressure settings for the LP and HP safety switch
and pump-down listed in tablefrom section "Low
pressure".
When ever possible(ie. PLC control), it is
recommended to limit the possibilities of
compressor auto restart to less than 3to 5times
during aperiod of 12hours when caused by
motor protection or LP safety switch tripping.
This control must be managed as amanual reset
device.
M
DGT
HP
LPS
180 s
TH
LP
CONTROL CIRCUIT
F1F1
KM
KM
KM
KA KA
A1
A2
A3
KA
KA
KS
KS
KS
L1 L3 L2
Q1
T1
T3
T2
LLSVKS
Wiring diagram with pump-down cycle
KM
L1 L3L2
Q1
CONTROL CIRCUIT
F1F1
KMKA
KAKS
KS
KS
HP
DGT
TH
180 s
85 52 019 - A
T1 T2
M
T3
KAKA
A1
A2
A3
Wiring diagram withoutpump-down cycle
LPS

19
FRCC.PC.007.B8.02
Application guidelines Electrical data, connections and wiring
Compressor modelsSH 180
Compressor model SH240-295-300-380
Compressor model SH485
Fuses ..................................................................................................F1
Compressor contactor................................................................ KM
Control relay...................................................................................KA
Safety lock out relay......................................................................KS
Optional short cycle timer (3 min) .......................................180 s
External overload protection......................................................F2
Pump-down pressure switch ......................................................LP
High pressure safety switch........................................................HP
Control device ................................................................................ TH
Liquid Line Solenoid valve...................................................... LLSV
Discharge gas thermostat / thermistor................................DGT
Fused disconnect...........................................................................Q1
Motor safety thermostat...........................................................thM
Compressor motor..........................................................................M
Motor Protection Module ...................................................... MPM
Thermistor chain.............................................................................. S
Safety pressure switch ................................................................LPS
Legend
A1
A3
A2
LPSMPM
12 14
11 N
2 1
L1
Wiring diagram withoutpump-down cycle
A1
A3
A2
LPS
Motor Protection
12 14
11 N
2 1
Module
L1
Wiring diagram with pump-down cycle
A1
A3
A2
MPM
S
LPS
Wiring diagram with pump-down cycle
LP
A1
A3
A2
MPM
S
LPS
DGT
Wiring diagram with pump-down cycle
LP
A1
A3
A2
MPM
S
KS
Wiring diagram without pump-down cycle
LPS
A1
A3
A2
MPM
S
KS
Wiring diagram without pump-down cycle
LPS
DGT

20 FRCC.PC.007.B8.02
Application guidelines Electrical data, connections and wiring
Motor protection
Compressor models SH090-105-120-140-161-184
have been provided with an internal overload
motor protection to prevent against excessive
current and temperature caused by overloading,
low refrigerant ow or phase loss. The cutout
current is the MCC value listed in section "Three
phase electrical characteristics".
The protector is located in the star point of the
motor and, should it be activated, will cut out all
three phases. It will be reset automatically.
While not compulsory, an additional external
overload is still advisable for either alarm or
manual reset.
Then it must be set below MCC value (at max
operating current:
• when the motor temperature is too high, then
the internal protector will trip
• when the current is too high the external
overload protection will trip before the internal
protection therefore oering possibility of
manual reset.
Compressor models SH180-240-295-300-
380-485 are delivered with a pre installed
motor protection module inside the terminal
box. This device provides for ecient and
reliable protection against overheating and
overloading (as well as phase loss/reversal on
SH240-295-300-380-485).
The motor protector comprises a control module
and PTC sensors embedded in the motor
winding. The close contact between thermistors
and windings ensures a very low level of thermal
inertia.
The motor temperature is being constantly
measured by a PTC thermistor loop connected
on S1-S2 (called 1-2 on SH180). If any thermistor
exceeds its response temperature, its resistance
increases above the trip level (4,500 Ω) and the
output relay then trips – i.e. contacts M1-M2 (or
11-14 for SH180) are open. After cooling to below
the response temperature (resistance <2,750Ω),
a 5-minute time delay is activated.
After this delay has elapsed, the relay is once
again pulled in – i.e. contacts M1-M2 (11-14
for SH180) are closed. The time delay may be
cancelled by means of resetting the mains (L-N
-disconnect) for approximately 5 sec.
A red/green twin LED is visible on the module.
A solid green LED denotes a fault free condition.
A blinking red LED indicates an identiable fault
condition:
PTC overheat
Appr. 1 second
Delay timer active (after PTC over temp.)
Appr. 1 second
Use a phase meter to establish the phase
orders and connect line phases L1, L2 and L3
to terminals T1, T2 and T3, respectively. The
compressor will only operate properly in a single
direction, and the motor is wound so that if the
connections are correct, the rotation will also be
correct.
Phase sequence and reverse
rotation protection

Compressor model Overheating protection Over current protection Locked rotor protection Phase reversal protection
SH 090 - 105 - 120 - 140- 161
- 184 Internal motor protection Phase sequence detector recommended
SH 180 Electronic module located in terminal box Reverse vent valve
SH240 - 295 - 300 - 380-485 Electronic module located in terminal box


