Danfoss LLZ013 Application guide
Application guidelines
Danfoss scroll for refrigeration
LLZ013 to 034 with NI/VI/LI
Low temperature
50-60 Hz - R404A, R507
http://cc.danfoss.com
Content
GENERAL INFORMATION ........................ 4
PRODUCT INFORMATION ....................... 5
Features..................................................... 5
Overview ......................................................................5
Compressor model designation ............. 6
Nomenclature ............................................................6
Technical specications ........................... 7
50-60 Hz data .............................................................7
Dimensions ............................................. 10
Single compressors LLZ013-015-018 ...............10
Single compressors LLZ024 .................................11
Single compressors LLZ034 ...............................12
Electrical data, connections and wiring 14
Motor voltage ...........................................................14
Wiring connections ................................................ 14
IP rating .......................................................................15
Three phase electrical characteristics ............. 15
Motor protection.....................................................16
Approval and certicates ...................... 17
Pressure equipment directive ............................17
Low voltage directive ............................................ 17
Machines directive .................................................17
Internal free volume...............................................17
SYSTEM DESIGN ..................................... 18
Design piping ......................................... 18
General requirements ...........................................18
Design compressor mounting .............. 19
General requirements ...........................................19
Single compressor requirements ......................19
Manage sound and vibration ................ 20
Compressor sound radiation ............................. 20
Mechanical vibrations ...........................................21
Gas pulsation ............................................................21
Manage operating envelope ................. 22
Requirement ............................................................ 22
Evaluate the risk ...................................................... 24
Theory of Injection cycle ....................... 25
Theory of Vapor injection cycle ........................ 25
Theory of liquid injection cycle ........................ 25
TREV installation ..................................................... 26
Manage superheat ................................. 28
Requirement ............................................................ 28
Evaluate the risk ...................................................... 28
Test, criteria and solutions .................................. 28
Manage o cycle migration ................... 29
Requirement ............................................................ 29
Evaluate the risk ...................................................... 29
Test, criteria and solutions .................................. 29
Control logic ...........................................30
Safety control logic requirements ................... 30
Cycle rate limit requirements ............................ 30
Oil management logic recommendations ... 30
Defrost logic recommendations ...................... 30
Pump-down logic recommendations .............31
Provide power supply and electrical
protection ............................................... 32
Wiring information ................................................ 32
INTEGRATION INTO SYSTEMS ..............33
Reduce moisture in the system ............. 33
Requirements .......................................................... 33
Solutions ................................................................... 33
Assembly line procedure ....................... 34
Compressor storage .............................................. 34
Compressor holding charge .............................. 34
Handling ................................................................... 34
Piping assembly...................................................... 35
System pressure test and leak detection ...... 35
Vacuum evacuation and moisture removal 36
Refrigerant charging ............................................. 36
Dielectric strength and insulation resistance
tests ............................................................................. 36
Commissioning ....................................... 37
Preliminary check....................................................37
Initial start-up ...........................................................37
System monitoring .................................................37
Dismantle and disposal ......................... 38
ORDERING INFORMATION ................... 39
Packaging ............................................... 39
Ordering codes ....................................... 40
Accessories .............................................. 41
3FRCC.PC.039.A1.02
General Information
PRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION GENERAL INFORMATION
Danfoss scroll compressors are designed and
manufactured according to the state of the
art and to valid European and US regulations.
Particular emphasis has been placed on
safety and reliability. Related instructions are
highlighted with the following icons:
R
This icon indicates instructions to avoid
reliability risk.
This icon indicates instructions to avoid
safety risk.
You are strongly advised to follow these
instructions. For any deviation from the
guidelines, please contact Danfoss Technical
Support.
In any case, Danfoss accepts no liability as a result
of the improper integration of the compressor
into the unit by the system manufacturer.
4 FRCC.PC.039.A1.02
Features
Overview Economized compressor: In the LLZ range of
Danfoss scroll compressor for refrigeration, LLZ,
with its unique scroll design and manufacturing
process exibility, oers a highly ecient solution
for demanding refrigeration applications.
This new family of refrigeration scroll
compressors includes 5 sizes of low temperature
scroll compressors designed for commercial
refrigeration applications. These compressors are
engineered for refrigeration and oer cooling
capacity from 5 to 12 kW (4 to 10 HP) at common
voltages and frequencies as well as any of the
common refrigerants (R404A / R507).
refrigeration scrolls, the compressors can work
with the economizer line activated, named as
economized compressor; or with the economizer
line disabled, named as standard compressor. The
economized compressor has been developed to
provide improved performance and an enlarged
operating envelope in refrigeration applications.
The economized compressor system presents
benets over standard refrigeration compressor
systems of equivalent horse power due to the
following:
• Capacity improvement: The capacity is
improved without increasing compressor
displacement, as it is increased by further
increasing system sub cooling with a
heat exchanger acting as an economizer
(connected to the compressor economizer
line). Furthermore a smaller economized
compressor can be used to achieve the same
capacity as a larger standard compressor,
leading to cost advantages.
• Eciency improvement: With a suitable sized
heat exchanger, the eciency improves
due to the fact that the gain in capacity is
greater than the increase in power that the
compressor consumes.
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
• Enlarged operating envelope: The injection
of vapour through the economizer line
will reduce the discharge temperature and
therefore enlarge the operating envelope
based on the same suction status.
Standard compressor with liquid injection: The
standard compressor can also connect with a
liquid valve to reduce the discharge temperature
and enlarge the envelope.
• Enlarged operating envelope: The liquid
injection of refrigerant into the compressor
will ash and absorb heat from the
compressed gas and scroll set leading to
cooling of the discharge gas, thus keeping
the discharge gas temperature within safe
limits. The enlarged operating envelope is
therefore based on the same suction status.
5FRCC.PC.039.A1.02
Compressor model designation
Nomenclature
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Family, Refrigerant & lubricant
LLZ: low temperature refrigeration,
R404A, R507 & PVE lubricant
Nominal capacity
In thousand Btu/h at 60 Hz,
ARI, LBP conditions
Model variation
T: design optimised for refrigeration
Danfoss scroll compressor LLZ for R404A, R507
is available as single compressor and can be
assembled in manifolding combinations.
Type FeaturesMotorSize
LLZ Q 9T 4 L
013
9
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”.
Other features
Oil sight
glass
Threaded
Tubing and electrical connections
Q: rotolock connections, screw terminals
Motor protection
L: internal motor protection
Motor voltage code
2: 200-220V/3~/50 Hz & 208-230V/3~/60 Hz
4: 380-415V/3~/50 Hz & 460V/3~/60 Hz
9: 380V/3~/60 Hz
Oil
equalisation
None Schrader None
Oil
drain
LP gauge
port
equalisation
Gas
port
None
6 FRCC.PC.039.A1.02
Technical specications
50-60 Hz data
Model with activated economizer line only
Models
Refrigerant
Nominal
tons 60 Hz
TR W Btu/h W W/W Btu/h/W cm
Nominal cooling
capacity
Power
input
COP E.E.R.
Swept
volume
Displace-
ment
3
/rev m3/h dm
Oil charge
3
Net weight
LL Z013 4 4044 138 02 3 011 1.34 4.57 67. 4 11.7 1.62 42
LL Z015 5 4840 16519 3511 1.38 4.71 83.5 14. 5 1.62 42
50 Hz
R404A/507*
LLZ018 6 5766 19679 4041 1.43 4.88 97. 6 17 1.62 43
LLZ024 8 7242 24717 4994 1.45 4.95 120 .2 20.9 2.51 46
LLZ034 10 9907 33812 6597 1.50 5.12 168.7 29.4 2.51 51
LL Z013 4 4863 16597 3482 1.40 4.78 67.4 14.2 1.62 42
LL Z015 5 5778 19720 415 8 1.39 4.74 83.5 17.5 1.62 42
60 Hz
R404A/507*
LLZ018 6 6905 23567 4739 1.46 4.98 97.6 20.5 1.62 43
LLZ024 8 8555 29198 5784 1.48 5.05 120. 2 25.3 2.51 46
LLZ034 10 12 041 4109 6 7807 1.54 5.26 168.7 35.4 2. 51 51
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: EN12900 Evaporating temperature: -35 °C Superheat: 10 K
EER: Energy Eciency Ratio Refrigerant: R404A* Condensing temperature: 40 °C Subcooling: 5 K
COP: Coecient Of Performance Economizer SH: 5 K Economizer ΔT: 5K
All of the compressor performance test after run-in 72h
*R507 performance data are nearly identical to R404A performance data
Subject to modication without prior notication.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
Model without activated economizer line, without liquid injection
kg
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Models
Refrigerant
Nominal
tons 60 Hz
TR W Btu/h W W/W Btu/h/W cm
Nominal cooling
capacity
Power
input
COP E.E.R.
Swept
volume
Displace-
ment
3
/rev m3/h dm
Oil charge
3
LL Z013 4 2417 8249 2366 1.02 3.48 67.4 11. 7 1.62 42
LL Z015 5 2937 10024 2776 1.06 3.62 83.5 14.5 1.62 42
50 Hz
R404A/R507*
LLZ018 6 3453 117 85 3150 1.10 3.75 97. 6 17 1.62 43
LLZ024 8 4 411 15055 3957 1.11 3.79 120.2 20.9 2.51 46
LLZ034 10 6051 20652 5458 1.11 3.79 168 .7 29.4 2.51 51
LL Z013 4 2896 9884 2774 1.04 3.55 67.4 14.2 1.62 42
LL Z015 5 3552 1212 3 3307 1.07 3.65 83.5 17.5 1.62 42
60 Hz
R404A/R507*
LLZ018 6 4228 1443 0 3799 1.11 3.79 97. 6 20.5 1. 62 43
LLZ024 8 5278 18014 4 611 1.14 3.89 120.2 25.3 2. 51 46
LLZ034 10 740 4 25270 6157 1.20 4.10 168.7 35.4 2.51 51
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: EN12900 Evaporating temperature: -35 °C Superheat: 10 K
EER: Energy Eciency Ratio Refrigerant: R404A* Condensing temperature: 40 °C Subcooling: 0 K
COP: Coecient Of Performance
All of the compressor performance test after run-in 72h
*R507 performance data are nearly identical to R404A performance data
Subject to modication without prior notication.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
Net weight
kg
7FRCC.PC.039.A1.02
Technical specications
50-60 Hz data
Model with activated economizer line only
Models
Refrigerant
Nominal
tons 60 Hz
TR W Btu/h W W/W Btu/h/W cm
Nominal cooling
capacity
Power
input
COP E.E.R.
Swept
volume
Displace-
ment
3
/rev m3/h dm
Oil charge
LL Z013 4 4819 16447 3087 1.56 5. 32 6 7.4 11.7 1.62 42
LL Z015 5 5713 19498 3595 1.59 5.43 83.5 14.5 1.62 42
50 Hz
R404A
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
LLZ018 6 6806 23229 4137 1.64 5.60 97. 6 17 1.62 43
LLZ024 8 8548 29174 5113 1.67 5.70 120.2 20.9 2.51 46
LLZ034 10 11624 39672 6805 1.71 5.84 168.7 29.4 2.51 51
LL Z013 4 5776 19713 3573 1.62 5.53 67. 4 14.2 1.62 42
LL Z015 5 6821 23280 4266 1.60 5.46 83.5 17. 5 1.62 42
60 Hz
R404A
LLZ018 6 8152 27823 48 61 1.68 5.73 97. 6 20.5 1.62 43
LLZ024 8 10100 34471 5934 1.70 5.80 120. 2 25.3 2. 51 46
LLZ034 10 14028 47877 8055 1.74 5.94 168.7 35.4 2.51 51
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 Evaporating temperature: -31.7 °C Superheat: 50 K
EER: Energy Eciency Ratio Refrigerant: R404A* Condensing temperature: 40.6 °C Subcooling: 5 K
COP: Coecient Of Performance Economizer SH: 5 K Economizer ΔT: 5K
All of the compressor performance test after run-in 72h
*R507 performance data are nearly identical to R404A performance data
Subject to modication without prior notication.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
Model without activated economizer line, without liquid injection
3
Net weight
kg
Models
Refrigerant
Nominal
tons 60 Hz
TR W Btu/h W W/W Btu/h/W cm
Nominal cooling
capacity
Power
input
COP E.E.R.
Swept
volume
Displace-
ment
3
/rev m3/h dm
Oil charge
3
Net weight
LL Z013 4 3213 10966 2507 1.28 4.37 67. 4 11. 7 1.62 42
LL Z015 5 3898 133 04 2949 1.32 4. 51 83.5 14.5 1.62 42
50 Hz
R404A
LLZ018 6 4583 15642 3346 1.37 4.68 97.6 17 1.62 43
LLZ024 8 5854 19980 4204 1.39 4.74 120 .2 20.9 2. 51 46
LLZ034 10 7991 27273 5772 1.38 4.71 168 .7 29.4 2.51 51
LL Z013 4 3857 13164 2938 1. 31 4.47 67.4 14.2 1.62 42
LL Z015 5 4718 16102 3507 1.35 4. 61 83.5 17. 5 1.62 42
60 Hz
R404A
LLZ018 6 5616 19167 4028 1.39 4.74 97. 6 20.5 1.62 43
LLZ024 8 7 011 23928 4889 1.43 4.88 120. 2 25.3 2.51 46
LLZ034 10 9791 33416 6616 1.48 5.05 168.7 35.4 2.51 51
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 Evaporating temperature: -31.7 °C Superheat: 50 K
EER: Energy Eciency Ratio Refrigerant: R404A* Condensing temperature: 40.6 °C Subcooling: 0 K
COP: Coecient Of Performance
All of the compressor performance test after run-in 72h
*R507 performance data are nearly identical to R404A performance data
Subject to modication without prior notication.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
kg
8 FRCC.PC.039.A1.02
Technical specications
50-60 Hz data
Model with liquid injection only
Models
Refrigerant
Nominal
tons 60 Hz
TR W Btu/h W W/W Btu/h/W cm
Nominal cooling
capacity
Power
input
COP E.E.R.
Swept
volume
Displace-
ment
3
/rev m3/h dm
Oil charge
3
Net weight
LL Z013 4 2255 7694 2285 0.99 3.38 6 7.4 11 .7 1.62 42
LL Z015 5 2 814 9601 2811 1.00 3.41 83.5 14.5 1.62 42
50 Hz
R404A/507*
LLZ018 6 3307 112 83 3247 1.02 3.48 9 7.6 17 1.62 43
LLZ024 8 4086 13941 4016 1.02 3.47 120. 2 20.9 2.51 46
LLZ034 10 5807 19 813 5619 1.03 3. 53 168.7 29.4 2.51 51
LL Z013 4 2754 9397 2750 1. 00 3.41 67.4 14.2 1.62 42
LL Z015 5 3407 116 25 3355 1.02 3.46 83.5 17.5 1.62 42
60 Hz
R404A/507*
LLZ018 6 4031 13754 3809 1. 06 3.61 97.6 20.5 1.62 43
LLZ024 8 5024 17142 4703 1.07 3.64 120. 2 25.3 2 .51 46
LLZ034 10 7154 24409 6383 1.12 3.82 168.7 35.4 2.51 51
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: EN12900 Evaporating temperature: -35 °C Superheat: 10 K
EER: Energy Eciency Ratio Refrigerant: R404A* Condensing temperature: 40 °C Subcooling: 0 K
COP: Coecient Of Performance
All of the compressor performance test after run-in 72h
*R507 performance data are nearly identical to R404A performance data
Subject to modication without prior notication.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
All of these performance data base on using the injection valve: Sporlan Y1037-1/2-230-3/8ODFX3/8ODF
Model with liquid injection only
kg
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Models
Refrigerant
Nominal
tons 60 Hz
TR W Btu/h W W/W Btu/h/W cm
Nominal cooling
capacity
Power
input
COP E.E.R.
Swept
volume
Displace-
ment
3
/rev m3/h dm
Oil charge
3
Net weight
LL Z013 4 3027 10341 2403 1.26 4.30 6 7.4 11. 7 1.62 42
LL Z015 5 3777 12887 2957 1.28 4.36 83.5 14.5 1.62 42
50 Hz
R404A/507*
LLZ018 6 4439 15146 3 415 1.30 4.44 9 7.6 17 1.62 43
LLZ024 8 5450 18595 4225 1. 29 4.40 120.2 20.9 2.51 46
LLZ034 10 7 746 26429 5912 1. 31 4.47 168.7 29.4 2.51 51
LL Z013 4 3694 12604 2896 1.28 4.35 6 7.4 14. 2 1.62 42
LL Z015 5 4569 16688 3533 1.29 4.41 83.5 17.5 1.62 42
60 Hz
R404A/507*
LLZ018 6 5406 18445 4 011 1. 35 4.60 97.6 20.5 1. 62 43
LLZ024 8 6691 22830 4956 1.35 4.60 120.2 25.3 2.51 46
LLZ034 10 9528 32510 6727 1.41 4.83 168.7 35.4 2.51 51
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 Evaporating temperature: -31.7 °C Superheat: 50 K
EER: Energy Eciency Ratio Refrigerant: R404A* Condensing temperature: 40.6 °C Subcooling: 0 K
COP: Coecient Of Performance
All of the compressor performance test after run-in 72h
*R507 performance data are nearly identical to R404A performance data
Subject to modication without prior notication.
Data given for motor code 4 compressor, for full data details and capacity tables refer to Online Datasheet Generator: www.danfoss.com/odsg
All of these performance data base on using the injection valve: Sporlan Y1037-1/2-230-3/8ODFX3/8ODF
kg
9FRCC.PC.039.A1.02
Dimensions
231.9
451
7.2
Single compressors
LLZ013-015-018
95.3
231.9
190.25 - 190.75
1°
Schrader valve
and cover
95.3
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
133
108.8
Schrader
119.3
78.5 - 80.5
Discharge line
Ø1.00" - 14UN (2A)
92 - 94
34°
31°
45°±2°
124.9
suction
106.4
line
sight
glass
190.25 - 190.75
Injection line
Ø1.00" - 14UN (2A)
Suction line
Ø1.25" - 12UN (2A)
478.2
238.4
C
T₁
R
T₃
Ring connect screw terminals
C terminal box type
Sight glass
86.4
374.5
302.2
Mounting grommetTerminal box
1.7
S
T₂
41
29.5
Ø 41
Recommended torque for
mounting bolts: 11 Nm (±1 Nm)
Ø11
5/16" - 18 UNC
self tapping
10 FRCC.PC.039.A1.02
Dimensions
Single compressors
LLZ024
133
119.3
95.25
231.9
190.25-190.75
108.8
4x Ø19.0 - 20.0
106.4
sight
glass
14°±2°
124.9
suction
line
95.25
190.25-
190.75
231.9
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Discharge line
Ø1.25" - 12UN (2A)
92.0-94.0
505.5
278.4
78.5-80.5
34°
31°
45°±2°
Ø183.14-185.14
73°
Injection line
Ø1.00" - 14UN (2A)
Suction line
Ø1.75" - 12UN (2A)
Sight glass
Schrader valve
and cover
7.2
48.4
532.7
414.5
342.2
126.4
C
T₁
R
T₃
Ring connect screw terminals
C terminal box type
Mounting grommetTerminal box
1.7
S
T₂
41
29.5
Ø 41
Recommended torque for
mounting bolts: 11 Nm (±1 Nm)
Ø11
5/16" - 18 UNC
self tapping
11FRCC.PC.039.A1.02
Dimensions
7.2
530.5
231.9
Single compressors
LLZ034
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
133
95.25
190.25 - 190.75
108.8
Schrader
106.4
sight
glass
4x Ø19 - 20
124.9
suction
line
95.25
231.9
190.25 - 190.75
119.3
78.5 - 80.5
Discharge line
Ø1.25" - 14UN (2A)
92 - 94
303.4
34°
183.14 - 185.14
31°
45°±2°
14°±2°
73°
Injection line
Ø1.00" - 14UN (2A)
Suction line
Ø1.75" - 12UN (2A)
Sight glass
Schrader valve
and cover
557.7
439.5
367.2
12 FRCC.PC.039.A1.02
C
T₁
R
T₃
Ring connect screw terminals
C terminal box type
126.4
48.4
Mounting grommetTerminal box
1.7
S
T₂
41
29.5
Ø 41
Recommended torque for
mounting bolts: 11 Nm (±1 Nm)
Ø11
5/16" - 18 UNC
self tapping
Dimensions
Oil sight glass
Schrader
Suction and discharge
connections
LLZ scroll compressors come equipped with a
threaded oil sight glass with 1"1/8 - 18 UNEF
connection. It can be used for a visual check
of the oil amount and condition or it may be
replaced by an accessory oil management device.
The oil level must be visible in the sight glass
during operation.
The oil ll and drain connection and gauge port
is a 1/4" male are connector incorporating a
schrader valve.
LLZ scroll compressors are factory delivered with rotolock connections only.
Compressor Models
Suction Fitting (in) Discharge Fitting (in) Injection Fitting (in)
LZL013 1"1/4 1" 1"
LL Z015 1"1/4 1" 1"
LLZ018 1"1/4 1" 1"
LLZ024 1"3/4 1"1/4 1"
LLZ034 1"3/4 1"1/4 1"
Rotolock Sizes
Oil sight glass
Schrader valve
and cap
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
13FRCC.PC.039.A1.02
Electrical data, connections and wiring
Danfoss scroll compressors LLZ are available in 3 dierent motor voltages as listed below.Motor voltage
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Motor voltage code Code 2 Code 4 Code 9
Nominal voltage 200-220V-3 ph 380-415V - 3 ph -
50 Hz
Voltage range 180 -242V* 342-457 V
Nominal voltage 208-230V-3 ph 460V - 3 ph 380V -3 ph
60 Hz
Voltage range 187-253V* 414-5 06 V 342-418V
Wiring connections
The maximum allowable voltage imbalance is
2%. Voltage imbalance causes high amperage
over one or several phases, which in turn leads to
% voltage
imbalance
Vavg = Mean voltage of phases 1, 2, 3.
V1-2 = Voltage between phases 1 and 2.
Danfoss scroll compressors LLZ will only
R
= x 100
| Vavg - V1-2 | + | Vavg - V1-3 | + | Vavg - V2-3 |
compress gas while rotating counter-clockwise
(when viewed from the compressor top).
Three-phase motors will start and run in either
direction, depending on the phase angles of
the supplied power. Care must be taken during
installation to ensure that the compressor
operates in the correct direction (see “Phase
sequence and reverse rotation protection”).
The drawings hereafter show electrical terminal
labelling and should be used as a reference
when wiring the compressor. For three phase
applications, the terminals are labelled T1, T2, and
T3. . For single-phase applications the terminals
are labelled C (common), S (start), and R (run).
overheating and possible motor damage. Voltage
imbalance is given by the formula:
2 x Vavg
V1-3 = Voltage between phases 1 and 3.
V2-3 = Voltage between phases 2 and 3.
C
T1
S
T2
R
T3
Ring connect screw terminals
C terminal box type
Terminal cover mounting
Terminal cover removal
14 FRCC.PC.039.A1.02
The terminal cover and gasket should be installed
prior to operation of the compressor. Respect the
"up" marking on gasket and cover and ensure
push
push
that the two outside tabs of the cover engage the
terminal box.
push
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