Danfoss Performer SH090 Instruction Manual

Danfoss scroll compressors
SH090 to SH485 - single
50 Hz - 60 Hz - R410A
Application guidelines
http://cc.danfoss.com

3AB243586442172en-001301
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* and 161* .............................8
SH 140 and 161 code 3 and SH184......................9
SH180-240-295 .........................................................10
SH380-485 (Except code 3) ................................ 11
SH380 code 3............................................................12
Electrical data, connections and wiring13
Connection details .................................................13
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 directive 2014/68/EU... 22
Low voltage directive 2014/35/EU ................... 22
Machines directive 2006/42/EC ........................ 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 recommendations.. 27
Refrigerant charge limit....................................... 28
O-cycle migration ............................................... 29
Liquid ood back ....................................................31
Specic application recommendations32
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
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 strength43
Commissioning....................................................... 43
Oil level checking and top-up........................... 43
Ordering information and packaging.. 44
Packaging ................................................................. 44
Ordering information ........................................... 45
Accessories.............................................. 47
ContentApplication Guidelines

4AB243586442172en-001301
Scroll compression principle
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
Application Guidelines

5AB243586442172en-001301
Features
SH range is composed of SH090-105-120-140-
161-184 (light commercial platform) and SH180-
240-295-380-485 (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.
SH180-240-295-380-485SH090-105-120-140-161-184
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
Application Guidelines

6AB243586442172en-001301
Compressor model designation
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.PC.008.
Nomenclature
Family, lubricant
& refrigerant
SH: Scroll, POE lubricant,
for R410A Motor protection
L: Internal overload protector
A: Electronic, 24V AC
B: Electronic, 110-240V
C: Customized electrical box
Suction and discharge connections
A: Brazed connections
Family,
lubricant
& refrigerant
Nominal
capacity
Approvals Voltage Version Evolution
index
Evolution index
A~Z
A4SH AAB
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
295
Application Guidelines

7AB243586442172en-001301
Technical specications
50-60 Hz data
Model
Nominal
tons 60 Hz Nominal cooling capacity Power input COP E.E.R. Swept volume Displace- ment Oil charge Net weight 
TR WBtu/h kW W/W Btu/h/W cm3/rev m3/h dm3 kg
50 Hz
SH090 7.5 22300 76100 7.19 3.10 10.58 88.40 15.4 3.0 58.0
SH105 926800 91500 8.47 3.17 10.82 103.50 18.0 3.3 64.0
SH120 10 30000 102400 9.46 3.17 10.82 116 .90 20.3 3.3 64.0
SH140 12 34700 118400 10.58 3.28 11.19 133.00 23.1 3.3 67.0
SH161 13 38800 132400 12.15 3.19 10.89 151.70 26.4 3.3 69.0
SH184 15 44700 152600 13.73 3.25 11.09 170. 30 29.6 3.6 71.5
SH180 15 44500 151900 13.87 3.21 10.96 170.20 29.6 6.7 108.0
SH240 20 59700 203800 18.50 3.23 11.02 227. 60 39.6 6.7 108.0
SH295* 25 73200 249800 22.51 3.25 11.0 9 276.20 48.1 6.7 111.0
SH380 30 90500 308900 28.18 3.21 10.96 345.00 60.0 6.7 159.0
SH485 40 117543 401068 35.58 3.30 11. 27 442.60 77.0 6.7 175.0
60 Hz
SH090 7.5 27100 92500 8.57 3.16 10.78 88.40 18.6 3.0 58.0
SH105 932100 109600 9.96 3.22 10.99 103.50 21.8 3.3 64.0
SH120 10 36800 125600 11.25 3.27 11.16 116.90 24.6 3.3 64.0
SH140 12 42300 144400 12.77 3.31 11.30 133.00 27.9 3.3 67.0
SH161 13 47200 161100 14.43 3.27 11.16 151.70 31.9 3.3 69.0
SH184 15 54000 184300 16.45 3.28 11.19 170.30 35.8 3.6 71.5
SH180 15 54300 185300 16.58 3.27 11.16 170.20 35.7 6.7 108.0
SH240 20 72200 246400 22.10 3.27 11.16 227.60 47.8 6.7 108.0
SH295* 25 88500 302000 27.21 3.25 11.09 276.20 58.0 6.7 111.0
SH380 30 109600 374100 33.99 3.22 10.99 345.00 72.3 6.7 159.0
SH485 40 144592 493362 43.03 3.36 11.47 442.60 92.9 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.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
* SH295 replaces SH300. SH300 model remains available for after-market, please refer to datasheets for technical details.
Application Guidelines

8AB243586442172en-001301
Dimensions
SH090-105-120-140* and
161*
(* except code 3)
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
Application Guidelines

9AB243586442172en-001301
Dimensions
SH 140 and 161 code 3 and
SH184
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
Application Guidelines

10 AB243586442172en-001301
Dimensions
SH180-240-295
Flexible grommetRigid spacer
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
27.5 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
4x rigid
spacer 29.5
4x holes Ø19
All dimensions in mm
92.5
531.5
HM 8 bolt
Lock washer
Flat washer
Rigid spacer
Nut
Nut
29.5 mm
Application Guidelines

11AB243586442172en-001301
Dimensions
Flexible grommet
Rigid spacer
SH380-485 (Except code 3)
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
27.5 mm
Compressor
base plate
HM 8 bolt
Lock washer
Flat washer
Rigid spacer
Nut
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
4 holes Ø19
76.6
345.4
279.4
218.6
212
356
195
109
183
60°
60°
428
304.8
370.8
92.5
Application Guidelines

12 AB243586442172en-001301
Dimensions
Flexible grommet
Rigid spacer
SH380 code 3
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
27.5 mm
Compressor
base plate
HM 8 bolt
Lock washer
Flat washer
Rigid spacer
Nut
Nut
29.5 mm
Ø333.2
Ø318.1
277.4
172.2
524.8
76.6 92.5
301.5
667
725.8
Discharge: 1"1/8
Suction
1"5/8
60°
345.4
279.4
304.8370.8
356
273
477
202.3
308.8
8°
183
202
195
60°
4 holes Ø19.43 All dimensions in mm
Application Guidelines

13AB243586442172en-001301
Electrical data, connections and wiring
Suction and discharge
connections
Oil drain connection
Oil sight glass All Danfoss SH scroll compressors come equipped
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.
The oil ll connection and gauge port is a 1/4"
male are connector incorporating a schrader
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"1/8 sleeve.
SH180-240-295-380-485: 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 Guidelines 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 remove the
oil. The connection is a female 1/4" are tting
incorporating a schrader valve and is mounted on
SH180 - 240 - 295 - 380 - 485 models only.
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"
SH180-240-295-380 Suction 1"5/8
Discharge 1"1/8
SH485 Suction 1"5/8
Discharge 1"3/8
SH 090 - 105 - 120 -
140 - 161 - 184
SH 180 - 240 - 295 -
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
Application Guidelines

14 AB243586442172en-001301
Electrical data, connections and wiring
Danfoss SH scroll compressors are available in ve dierent motor voltages as listed below.
Electrical power is connected to the compressor
terminals by Ø 4.8 mm (3/16") screws.
The maximum tightening torque is 3 Nm. 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 and
SH184
The terminal box is provided with a Ø 25.5 mm
(ISO25) and a Ø 29 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
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 3 Code 4 Code 6 Code 7 Code 9
50 Hz
Nominal voltage -380-400V - 3 ph
380-415V - 3 ph* 230V - 3 ph 500V - 3 ph -
Voltage range** -342-440 V
342-457V* 207-253 V 450 - 550 V -
60 Hz
Nominal voltage 200-230V - 3 ph 460V - 3 ph - 575 V-3 ph 380V- 3 ph
Voltage range** 180-253 V 414-506 V -517- 632 V 342-418 V
* SH295 and 485
** The voltage range indicates where the compressor can run in the majority of the application envelope. A boundary voltage supply
which accumulates under specic conditions such as high ambiance, high superheat, or map boundary conditions, may lead to a
compressor trip.
Application Guidelines

15AB243586442172en-001301
Electrical data, connections and wiring
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 3 power supply knockouts accommodate the
following diameters:
• Ø 50.8 mm (UL 1"1/2 conduit) and Ø 43.7
mm (UL 1"1/4 conduit) and Ø 34.5 mm (UL 1"
conduit)
• Ø 40.5 mm (ISO40) and Ø 32.2 mm (ISO32) and
Ø 25.5 mm (ISO25)
• Ø 25.5 mm (ISO25)
The 4 others knockouts are as follows:
• Ø 22.5 mm (PG16) (UL 1/2") and Ø 16.5 mm
(ISO16) (x2)
• 20.7 mm (ISO20 or PG13.5) (x2)
SH180-240-295-380*-485*
Except code 3
SH380 code 3
Power supply
Power supply
Black
Sump heater
Cover holding screws (x3)
Blue Brown
M1, M2
Control circuit
Terminal box
The motor protection module comes preinstalled
within the terminal box. Phase sequence
protection connections and thermistor
connections are pre-wired and should not be not
be removed. The module must be connected to
a power supply of the appropriate voltage. The
module terminals are 6.3-mm size Faston type.
LNS1 S2 M1 M2
L1 L2 L3
Black Blue Brown
Phase sequence input
Internal control contact
Safety
circuit
Thermistor
connection
Module power
IP rating 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 against water splashing
Black Blue Brown
Faston 1/4" tabs
Power supply
Sump heater
Module
power supply
M1-M2
Control circuit
The terminal box is provided with Ø 50.5 mm
(ISO50) (UL 1"1/2 conduit) hole with possible
Ø 63.5 mm (ISO63) (UL 2" conduit) knockout for
power supply and 2 x Ø 22.5 mm (PG16)
(UL 1/2" conduit) knockouts for safety control
circuit.
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 would rise
too much. The installation of ventilation on the
enclosure panels may be necessary. If not, the
electronic protection module may not operate
properly. Any compressor damage related 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.
Terminal box temperature
Application Guidelines

16 AB243586442172en-001301
Electrical data, connections and wiring
Three phase electrical
characteristics
The MCC is the current at which the motor
protection trips under maximum load and
low voltage conditions. This MCC value is the
maximum at which the compressor can be
operated in transient conditions and out of
the application envelope. Above this value, the
internal motor protection or external electronic
module will cut-out the compressor to protect
the motor.
Locked Rotor Amp value is the higher average
current as measured on mechanically blocked
compressor tested under nominal voltage. The
LRA value can be used as rough estimation for
the starting current. However in most cases, the
real starting current will be lower. A soft starter
can be applied to reduce starting current.
MCC (Maximum Continuous
Current)
LRA (Locked Rotor Amp)
Compressor model LRA MCC Max. operating current Winding resistance
A A A Ω
Motor voltage code 3
200-230V / 3ph / 60 Hz
SH090 203 43 38 0.39
SH105 267 51 45 0.27
SH120 267 61 48 0.27
SH140 304 64 56 0.24
SH161 315 69 64 0.22
SH184 351 75 71 0.22
SH180 380 78 71 0.19
SH240 485 105 103 0.16
SH295 560 128 112 0.13
SH380 717 170 155 0.09
Motor voltage code 4
380-400 V / 3ph / 50 Hz *
460V / 3ph / 60hZ
SH090 98 22 19 1.47
SH105 142 25 22 1.05
SH120 142 29 24 1.05
SH140 147 30 28 0.92
SH161 158 35 31 0.83
SH184 197 38.6 36 0.83
SH180 170 38 34 0.8
SH240 215 51 49 0.62
SH295 260 62 56 0.52
SH380 320 79 72 0.42
SH485 344 106 91 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 51 41 0.35
SH140 236 53 49 0.31
SH161 236 57 53 0.31
SH184 236 57 56 0.31
Motor voltage code 7
500 V / 3ph / 50 Hz
575 V / 3 ph / 60 Hz
SH090 84 18 14 2.34
SH105 103 22 17 1.57
SH120 103 24 19 1.57
SH140 122 26 22 1.38
SH161 136 29 24 1.32
SH184 135 35 28 1.32
SH180 135 30 28 1.20
SH240 175 41 38 0.94
SH295 210 45 44 0.82
SH380 235 60 58 0.56
SH485 327 71 71 0.36
Motor voltage code 9
380 V / 3ph / 60 Hz
SH090 124 26 23 1.05
SH105 160 33 26 0.72
SH120 160 35 29 0.72
SH140 168 37 33 0.62
SH161 177 41 37 0.57
SH184 239 51 41 0.57
SH180 210 46 44 0.52
SH240 260 60 58 0.42
SH295 310 72 69 0.36
SH380 360 90 88 0.24
SH485 491 111 106 0.16
* 380-415V/3ph/50Hz for SH295 and SH485
Application Guidelines

17AB243586442172en-001301
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 tools for precise measurement.
Use a digital 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 a dierent value than 25°C, the measured
resistance must be corrected using 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 maximum load
conditions and 10% below nominal voltage
(+15°C evaporating temperature and +68°C
condensing temperature).
Max Oper. A can be used to select cables and
contactors.
In normal operation, the compressor current
consumption is always less 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 soft starter. MCI and MCD
soft starters are designed to reduce the
starting current of 3-phase AC motors; they
can reduce the inrush current by up to 40%,
thereby eliminating the detrimental eects of
high starting torque surges and costly demand
charges from the resultant current spike.
Danfoss MCI soft-start
controller
When the control voltage is applied to A1 - A2,
the MCI soft starter will start the motor, according
to the settings of the ramp-up time and initial
torque adjustments. When the control voltage
is switched OFF, the motor will switch o
instantaneously.
Upon starting, the controller gradually increases
the voltage supplied to the motor until full-line
voltage has been reached.
For MCI15C, MCI25C and MCI50M, all settings
such as initial torque, ramp-up time (less than
0.5sec) and ramp-down time are preset and do
not require any modication.
For MCD201-055, the following settings have to
be adjusted to ensure a maximum inrush current
reduction as well as a starting time less than
0.5sec.
Frequency Initial
torque
(%U)
Ramp-up
(seconds) Ramp down
(seconds)
50 Hz 60% 2 0
60 Hz 70% 0.5 0
Input controlled soft start
Initial torque
ramp-up
ramp-down
Time
U
Compressor model Soft start reference
Ambient max. 40°C Soft start reference Ambient max. 55°C
SH090 MCI15C MCI15C
SH105-120 MCI25C MCI25C
SH140-161 MCI25C MCI25C *
SH180-SH184 MCI50CM MCI50CM
SH240 MCI50CM MCI50CM *
SH295-380 MCI50CM * MCI50CM *
SH485 MCD201-055 MCD201-055
* by-pass contactor K1 is required
Application Guidelines

18 AB243586442172en-001301
Electrical data, connections and wiring
Suggested wiring diagrams logic
Compressor model SH 090 - 105 - 120 - 140 - 161 - 184
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 always switches in no-load condition
it can be selected on the basis of the thermal
current (AC-1).
13-14 contact not applicable with MCI 25C.
MCI with by-pass contactor
General wiring
information
The wiring diagrams below are examples for a
safe and reliable compressor wiring. In case an
alternative wiring logic is chosen, it is imperative
to respect the following rules:
When a safety 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.
In specic situations, such as winter start
operation, an eventual LP control for pump-
down cycles may be temporarily bypassed to
allow the system to build pressure. But it 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 table from section“Low
pressure”.
When ever possible (ie. PLC control), it is
recommended to limit the possibilities of
compressor auto restart to less than 3 to 5 times
during a period of 12 hours when caused by
motor protection or LP safety switch tripping.
This control must be managed as a manual 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
LLSV KS
Wiring diagram with pump-down cycle
KM
L1 L3 L2
Q1
CONTROL CIRCUIT
F1F1
KM KA
KA KS
KS
KS
HP
DGT
TH
180 s
85 52 019 - A
T1 T2
M
T3
KA KA
A1
A2
A3
Wiring diagram without pump-down cycle
LPS
Application Guidelines

19AB243586442172en-001301
Electrical data, connections and wiring
Compressor model SH180-240-295-380
Compressor model SH485
Fuses ..................................................................................................F1
Compressor contactor................................................................. KM
Control relay ................................................................................... KA
Safety lock out relay.......................................................................KS
Optional short cycle timer (3 mins) ......................................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
MPM
S
LPS
Wiring diagram with pump-down cycle
LP
A1
A3
A2
MPM
LPS
DGT
Wiring diagram with pump-down cycle
LP
S
A1
A3
A2
MPM
S
KS
Wiring diagram without pump-down cycle
LPS
Wiring diagram without pump-down cycle
LPS
DGT
A1
A3
A2
MPM
KS
S
Application Guidelines

20 AB243586442172en-001301
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 SH180-240-295-380-485 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.
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. 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 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 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
Delay timer active (after PTC over temp.)
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 Internal reverse vent
SH 180 Electronic module located in terminal box Internal reverse vent
SH240 - 295 - 380-485 Electronic module located in terminal box



Appr. 1 second
40ms 40ms460ms 460ms
Appr. 1 second
920ms80ms
Application Guidelines