Danfoss VZH052 Series User manual

Danfoss scroll compressors
VZH052-065
Single
R410A
Application guidelines
http://cc.danfoss.com

Content
GENERAL INFORMATION........................ 4
PRODUCT INFORMATION ....................... 5
Features......................................................5
How do IDVs work?................................................... 5
Compressor model designation ..............6
Nomenclature ............................................................ 6
Technical specifications............................7
Dimensions ..............................................10
VZH052-065G/J/H ...................................................10
Electrical data, connections and wiring13
Supply voltage.........................................................13
Phase sequence and reverse rotation
protection.................................................................. 15
IP rating.......................................................................16
Motor protection.....................................................16
Approval and certificates .......................17
Low voltage directive 2014/35/EU.................... 17
Internal free volume............................................... 17
SYSTEM DESIGN..................................... 18
Drive installation.....................................18
Direct and indirect exposure of drive to water
18
Condensation...........................................................18
Dust Exposure..........................................................18
Mechanical Mounting ...........................................18
Ambient temperature ...........................................19
EMC installation ..................................... 20
EMC best practices .................................................20
EMC remediation ....................................................20
EMC remediation ....................................................21
Mechanical dimension .........................................21
Unit Architecture.................................... 22
Design piping ......................................... 23
General requirements...........................................23
Design compressor mounting .............. 24
General requirements...........................................24
Single requirements...............................................24
Manage oil in the circuit ........................ 25
Requirement.............................................................25
System evaluation ..................................................25
Test, criteria and solutions...................................25
Manage sound and vibration................ 26
Compressor sound radiation..............................26
Mechanical vibrations...........................................27
Gas pulsation............................................................27
Manage superheat ................................. 28
Requirement.............................................................28
System evaluation ..................................................28
Test, criteria and solutions...................................29
Manage off cycle migration................... 30
Requirement.............................................................30
System evaluation .................................................30
Manage operating envelope................. 32
Requirement.............................................................32
System evaluation ..................................................33
Manage speed limit.................................37
Speed limit requirement......................................37
Start/Stop/Ramp setting......................................37
Control logic ........................................... 38
Safety control logic requirements....................38
Short cycle protection .........................................39
Defrost cycle logic ..................................................39
Pump-down logic recommendations.............39
Oil management logic ..........................................40
Reduce moisture in the system..............41
Requirements........................................................... 41
Solutions.....................................................................41
INTEGRATION INTO SYSTEMS.............. 42
Assembly line procedure....................... 42
Compressor storage...............................................42
Compressor holding charge ...............................42
Handling ....................................................................42
Piping assembly.......................................................43
System pressure test and leak detection .......43
Vacuum evacuation and moisture removal .44
Refrigerant charging..............................................44
Dielectric strength and insulation resistance
tests..............................................................................44
Commissioning....................................... 45
Preliminary check....................................................45
Initial start-up...........................................................45
System monitoring.................................................45
Oil level checking and top-up............................45
Troubleshooting..................................... 46
Dismantal and disposal ......................... 49
ORDERING INFORMATION ................... 50
Packaging ............................................... 50
Ordering codes........................................51
Accessories...............................................52
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PRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION GENERAL 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:
This icon indicates instructions to avoid
safety risk.
This icon indicates instructions to avoid
reliability risk.
The purpose of this guideline is to help
customers qualify compressors in the unit.
You are strongly advise 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.
R
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GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Features
Danfoss Intermediate Discharge Valves (IDVs)
are located close to the discharge side of the
compressor. They reduce excessive compression
of refrigerant under part-load conditions while
maintaining the same cooling capacity. The IDVs
open when discharge pressure falls below the
built-in optimization point. They adapt the effort
of the motor to the varying load and pressure
conditions in the system, thus reducing the effort
of the motor and its electrical consumption
and improving the system’s seasonal energy
efficiency.
How do IDVs work?
Intermediate discharge
valves for better efficiency
at low pressure-ratio Optimized scrolls for
better part load efficiency
New distributed IPM
motor lead to higher
power factor
High speed oil circulation
minimized by a oil return
tube
Linear control oil pump
PVE 32 lubricant ensures better
lubrication and efficiency
New designed oil cup to
minimize oil stirring loss under
high liquid level
EMC (Electro-Magnetic
Compatibility) bracket
provided allows for
grounding termination
of shielded wire-harness,
which reduces EMC
emissions between drive
and compressor
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GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Compressor model designation
Nomenclature
Note:
High overload output power: output power @160% Torque
Compressor nomenclature
Frequency converter
nomenclature
H2E20T4P11K303CDS
Dedicated compressor
drive for VZH scroll
Serie 303
High overload
output power
in kW
Main supply voltage
T2: 200-240V/3 ph/50-60 Hz
T4: 380-480V/3 ph/50-60 Hz
T6: 525-600V/3ph/50-60 Hz
RFI class
H2/H3/HX
Enclosure protection
IP rating
E20/E55
P11K/P15K/P22K
BNAGC065ZHV
Variable speed
Family
VZH scroll
Lubricant
PVE 32 (160 HV) lubricant,
R410A refrigerant
Swept volume
in cm³/rev
Evolution index
Motor protection type
N: no internal motor protection
(protection by drive)
Equipement version
A: brazed connections, single version
D: brazed connections, unified version
Motor voltage code to CDS303 *
G: 380-480V/3~/50 & 60Hz
H: 525-600V/3~/50 & 60Hz
J: 200-240V/3~/50 & 60Hz
* main supply voltage to frequency converter
Design pressure ratio
C: IDV and part load
ef iciency optimizedf
Single version Threaded None
Unified version Threaded Threaded
Oil sight glass Oil level switch
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Technical specifications
To have the optimum compressor selection,
select a compressor size which achieves the
peak load system cooling capacity demand at its
maximum speed.
Detailed performances can be found in
datasheets and in selection programs.
Compressor size
Different frequency converter variants are
available according to:
1. Mains supply voltage
2. IP class (CDS303 drives are available in IP20 or
IP55 housings)
3. RFI (Radio Frequency Interference) class H2/H3
or HX.
4. Printed Circuit Board (PCB) coated
When the compressor size and mains voltage
have been defined in the above selection criteria,
the code number tables from the“Ordering
information and packaging”section provides the
appropriate frequency converter sizes and up
to four corresponding code numbers for each
compressor model.
Note this compressor is equipped with
a six-pole electrical motor so the applied
frequency from the inverter will be 50 Hz for
1000 rpm up to 330 Hz for 6600 rpm.
Please refer to the table below
Frequency converter
variants
Compressor and
frequency converter
combinations
min max
Compressor speed rps 16.7 110
rpm 1000 6600
Drive output frequency Hz 50 330
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Technical specifications
Compressor
specifications
Frequency converter
specifications
Compressor
model
Swept volume
Displacement
Oil charge Net weight
1000 rpm 3000 rpm 3600 rpm 6600 rpm
(cm³/rev) (cu.in/rev) (m³/h) (cu.ft/h) (m³/h) (cu.ft/h) (m³/h) (cu.ft/h) (m³/h) (cu.ft/h) (dm3)(oz) (kg) (lbs)
VZH065 65.1 4.0 3.9 138 11.7 413 14.1 498 25.8 911 1.57 53 35 77
VZH052 52.1 3.2 3.1 109 9.4 332 11. 3 399 20.6 727 1.57 53 35 77
Mains supply voltage
T2: 200 - 240 V ±10% (3-phase)
T4: 380 - 480 V ±10% (3-phase)
T6: 525 - 600V ±10% (3-phase)
Supply frequency 50 / 60 Hz
Output voltage 0 - 100 % of supply voltage
Inputs 6 digital (0-24V), 2 analog (0/±10V or 4-20mA, scalable)
Programmable outputs 2 digital (0-24V), 1 analog (0/4-20mA), 2 relay
Protection functions Over-current protection, low / high current handling
Compressor functions Motor protection, compressor ramp up/down control
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Technical specifications
OIL level sensor A TEKLAB LC-XN optical-electrical level sensor
is fixed on the inverter compressor. The oil level
sensor prism is fixed on the compressor, the
electrical part is ordered by accessory kit. The oil
level sensor monitors the compressor oil level
and sends oil level signal to an external relay or
digital input of unit controller. A 5±2 seconds
delay is recommended to mitigate oil level
fluctuationand avoid false alarms.
- Lack of oil: Circuit between 2 and 3 will be
opened internally, there will be no current
flowing through load or coil of external relay,
relay is open.
- Enough oil: Circuit between 2 and 3 will be
closed internally, there will be current flowing
through load or coil of external relay, relay is
close.
Note: For 24VDC, output voltage in case of lack
of oil is >13V DC and not 0V
For customers who needs UL certificates, please
order 24V AC/DC sensor.
Oil level sensor is a special component which
assembles on variable speed compressor. It is
provided in oil level sensor accessory kit.
VZH052-065
1
L1
L2
L3
N
2
3
External
Load / Relay
230VAC MODEL
1
0VAC
24VAC
2
3
External
Load / Relay
24VAC MODEL
1
0VDC
24VDC
2
3
External
Load / Relay
24VDC MODEL
Sensor Sensor
Sensor
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Dimensions
Version Compressor model D H H1 H2 L1 L2 Outline drawing number
(mm) (inch) (mm)(inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch)
Single VZH052-065 183.5 7.22 436 17.17 403 15.87 261 10.28 190.5 7.5 190.5 7. 5 8590007
Unified VZH052-065 183.5 7.22 436 17.17 403 15.87 261 10.28 190.5 7.5 190.5 7. 5 8590013
VZH052-065G/J/H
H
H1
ΦD
H2
L2
L1
H
H1
ΦD
H2
L2
L1
Single version Unified version
EMC bracket to terminations
of shielded wire
Earth grounding
Mounting GrommetTerminal box
Ø 41
29.5
Recommended torque for
mounting bolts: 11 Nm (±1 Nm)
Ø11
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Dimensions
Connection Details VZH052-065 single version
Suction connection Brazed 7/8"
Discharge connection Brazed 3/4"
Oil sight glass Threaded (1"1/8 – 18 UNF)
Oil equalization connection -
Shrader Male 1/4" Flare incorporating a Schrader valve
1) VZH compressors single versions come
equipped with a threaded oil sight glass with
1"1/8 – 18 UNEF connection. It can be used for
a visual check of oil amount and condition.
2) Schrader: The oil fill connection and
gauge port is a 1/4" male flare connector
incorporating a Schrader valve.
Compressor models Brazed connection size
Rotolock adaptor set
(adaptor, gasket, sleeve, nut) Rotolock adaptor (adaptor only)
Rotolock Solder sleeve ODF Code Number Code Number
VZH052-065 Suction 7/8" 1-1/4" 7/8" 120Z0128 120Z0367
Discharge 3/4" 1-1/4" 3/4" 120Z0366
    
VZH compressors are all delivered with suction
and discharge brazed connections only. They are
copper-plated steel connections.
Rotolock adaptors are available, refer to the
information above.
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Dimensions
CDS303 Frequency
converter
Drive supply voltage
Drive power kW
Compressor
voltage code
Compressor model
IP20 IP55
Drive enclosure
Overall drive size
[H x W x L]
mm
(inch)
Overall drive size
[H x W x L] mm
(inch)
incl. decoupling
plate
Clearance
above/
below
mm
(inch)
Drive enclosure
Overall drive size
[H x W x L] mm
(inch)
Overall drive
size
[H x W x L]
mm
(inch)
incl.
decoupling
plate
Clearance
above/
below
mm
(inch)
T2: 200-240/3/50-60 11 J VZH052-065 B4 520x230x242
(20.47x9.06x9.53) 595x230x242 (23.43x9.06x9.53) 200 (8) B2 650x242x260 (25.59x9.53x10.24) -200 (8)
T4: 380-480/3/50-60
11*
G
VZH052 B3 399x165x249
(15.71x6.5x9.8) 420x165x249 (16.54x6.5x9.8) 100 (4) B1 480x242x260 (18.90x9.53x10.24) -100 (4)
15 VZH065 B3 399x165x249
(15.71x6.5x9.8) 420x165x249 (16.54x6.5x9.8) 100 (4) B1 480x242x260 (18.90x9.53x10.24) -100 (4)
T6: 525-600/3/50-60
15
H
VZH052 B3 399x165x249
(15.71x6.5x9.8) 420x165x249 (16.54x6.5x9.8) 100 (4) B1 480x242x260 (18.90x9.53x10.24) -100 (4)
22 VZH065 B4 520x230x242
(20.47x9.06x9.53) 595x230x242 (23.43x9.06x9.53) 200 (8) B2 650x242x260 (25.59x9.53x10.24) -200 (8)
L
H
WMin 100/200
Clearance above for cooling
Min 100/200
Clearance above for cooling
Frequency converter dimensions depend
on supply voltage, IP rating and power. The
table below gives an overview of the overall
dimensions and different drive enclosures (B1 -
B4). Details for each drive enclosure are on the
following pages.
Enclosure Height Width Depth Mounting hole Max. Weight
Frame IP Class A A1) a B b C d e f
(mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) kg lb
B1 IP55 480 18.9 - - 454 17.87 242 9.53 210 8.27 260 10.24 19 0.75 90.35 90.35 23 51
B2 IP55 650 25.59 - - 624 24.57 242 9.53 210 8.27 260 10.24 19 0.75 90.35 90.35 27 60
B3 IP20 399 15.71 420 16.54 380 14.96 165 6.5 140 5.51 249 9.80 12 0.47 6.8 0.27 7.9 0.31 12 26
B4 IP20 520 20.47 595 23.43 495 19.49 230 9.06 200 7.87 242 9.53 - - 8.5 0.33 15 0.59 23 51
A1) Including decoupling plate.
The dimensions are only for the physical units, but when installing in an application it is necessary to add space for free air passage both above and below the units.
The amount of space for free air passage is listed in “frequency converter dimensions - Clearance above/below (mm/inch)”.
Variable speed compressor package VZH065 (voltage code G) + CDS303 (T4, 11kW) is qualified, to be used at drive supply voltage 380-440V (3 phase, 50/60Hz).
Any further information please contact local Danfoss engineers.
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Electrical data, connections and wiring
Compressor electrical
specifications Compressor rated
voltage (V) Model RW(Ω) at 20°C line to line RLA (A) Max Operating Current (A)
400 VZH052-G
0.177Ω±7%
22.6 26
575 VZH052-H 22.6 26
400 VZH065-G 27.2 31.2
575 VZH065-H 27.2 31.2
208 VZH052-J 0.053Ω±7% 44.2 50.7
208 VZH065-J 55.3 63.6
RW: Winding resistance per winding, measured at motor terminals
RLA: Rated load Amp
Because VZH compressors are powered by a
frequency converter, the mains frequency, 50 or
60 Hz, is no longer an issue. Only the mains
voltage is to be taken into account. With 3 motor
voltage codes, the most common mains voltages
and frequencies are covered. Never connect the
VZH compressor directly to the mains power
supply in case of motor burnt.
Supply voltage Voltage code Mains voltage range of drive
J 200-240V / 3ph / 50Hz & 60Hz (±10%)
G 380-480V / 3ph / 50Hz & 60Hz (±10%)
H 525-600V /3ph / 50Hz & 60Hz (±10%)
Rated Load Amp value is the current value at
maximum load, in the operating envelope, and at
maximum speed and rated drive input voltage.
RLA is the measured value at the compressor
terminals (after the drive).
RLA (Rated Load Amp)
MOC (Max Operating
Current)
Wiring connections
Max operating current is the maximum
continuous current which is 115% of RLA. This
value is printed on compressor nameplate.
MOC can be used to select cables and contactors.
Electrical power is connected to the compressor
terminals by Ø 4.8mm (3/16") screws. The
maximum tightening torque is 3Nm. Use a 1/4"
ring terminal on the power leads.
Terminal cover mounting The terminal cover and gasket should be installed
prior to operation of the compressor. The terminal
cover has two outside tabs, 180 degrees apart,
that engage the terminal fence. When installing
the cover, check that it is not pinching the lead
wires.
Terminal cover removal
EMC bracket to terminations
of shielded wire
Earth grounding
push
push
push
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Electrical data, connections and wiring
Fuses Danfoss recommends using the fuses listed
below to protect service personnel and property
in case of component break-down in the
frequency converter.
For circuit breakers, Moeller types have been
tested and are recommended.
Frequency
converter
EN50178 compliant fuses UL Compliant fuses Recommended circuit breaker
Bussmann SIBA Little fuse IP20 IP55
Size Type Type RK1 Type J Type T Type RK1 Type RK1 Moeller type
3x200-240V
CDS303-11kW 80A gG KTN-R80 JKS-80 JJN-80 5014006-080 KLN-R80 NZMB1-A100 NZMB1-A100
3x380-480V
CDS303-11kW 63A gG KTS-R40 JKS-40 JJS-40 5014006-040 KLS-R40 PKZM4-50 PKZM4-63
CDS303-15kW 63A gG KTS-R50 JKS-50 JJS-50 5014006-050 KLS-R50 PKZM4-50 PKZM4-63
3x525-600V
CDS303-15kW 63A gG KTS-R-45 JKS-45 JKJS-45 5014006-050 KLSR045 PKZM4-50 PKZM4-63
CDS303-22kW 63A gG KTS-R-60 JKS-60 JJS-60 5014006-063 KLSR060 NZMB1-A100 NZMB1-A100
From network to frequency converter From frequency converter to compressor
Type mm² AWG Type mm² AWG
200 - 240 V CDS303-11kW 10 8 VZH052-J 10 8
CDS303-11kW 16 6VZH065-J 16 6
380 - 400 V CDS303-11kW 412 VZH052-G 4 12
CDS303-15kW 412 VZH065-G 610
525 - 600 V CDS303-15kW 412 VZH052-H 4 12
CDS303-22kW 412 VZH065-H 610
Note: The wire size in the guideline is the maximum wire size that connectors can accept but not the actual needed cable. The need-
ed cable size should be specified by the OEM depending on the unit design, ambient temperature, the wire material, current, etc...
Wire sizes Below table lists maximum wiring sizes for the motor compressor power supply cables.
from network
to drive
from drive to
to compressor
Circuit breaker
Power input
I
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Electrical data, connections and wiring
The CDS303 frequency converter generates by
design a compressor soft start with an default
initial ramp up of 7.5s to 50 rps.
Current inrush will not exceed the frequency
converter maximum current.
Basically seen from the mains, the inrush peak
reach a level which is only a few percent more
than the rated nominal current.
Soft-start control
The compressor will only operate properly
in a single direction. If electrical connections
are done correctly between the drive and the
compressor terminals (compressor T1/T2/T3 and
drive terminals U, V & W matching), the drive will
provide correct phase supply to the compressor,
and reverse rotation will be not possible:
• CDS terminal U (96) to VZH terminal T1
• CDS terminal V (97) to VZH terminal T2
• CDS terminal W (98) to VZH terminal T3
If compressor T1/T2/T3 and drive U, V & W
terminals are not matching, the compressor
can operate in a reverse rotation. This results in
excessive noise, no pressure differential between
suction and discharge, and suction line warming
rather than immediate cooling. The compressor
can be rapidly damaged in these conditions.
If reverse rotation symptoms occur, shut the
compressor down and connect the phases to
their proper terminals.
Mains connection to the CDS frequency
converter order has no influence on the output
phase sequence which is managed by the
frequency converter.
Phase sequence and
reverse rotation
protection
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Electrical data, connections and wiring
The compressor terminal box IP rating according to IEC529 is IP22.IP rating
Element Numerals or letters Meaning for the protection of equipment
First characteristic
numeral
0
1
2
3
4
5
6
Against ingress of solid foreign objects
(non protected)
≥ 50 mm diameter
≥ 12.6 mm diameter
≥ 2.5 mm diameter
≥ 1.0 mm diameter
dust protected
dust tight
Second
characteristic
numeral
0
1
2
3
4
5
6
7
8
Agains ingress of water with harmful effects
(non protected
vertically dripping
dripping (15° tilted)
spaying
splashing
jetting
powerful jetting
temporary immersion
continuous immersion
VZH scroll compressors are not equipped with
an internal motor protector. Motor protection
is provided by the variable speed drive. All
parameters are factory preset in order to
guaranty locked rotor or overload current
protection.
When a warning situation is reached in the
current control, the CDS frequency converter
will automatically reduce the compressor
speed in order to keep the motor current of the
compressor below the maximum allowed.
Motor protection
The maximum allowable voltage imbalance
between each phase is 3%. Voltage imbalance
causes high amperage over one or several
phases, which in turn leads to overheating and
possible drive damage.
Voltage imbalance
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Approval and certificates
VZH compressors comply with the following approvals and certificates.Approvals and
certificates
Low voltage directive
2014/35/EU
Internal free volume
CE
(European Directive) VZH code G & code J
UL
(Underwriters Laboratories) All VZH models
EMC Class A Group 1
2014/30/EU VZH compressor and drive package
CCC VZH code G
Products Internal free volume at LP side without oil (lite/cu.inch)
VZH052 4.7/287
VZH065 4.7/287
Products VZH052-065
Declaration of conformity ref.
Low voltage directive 2014/35/EU Contact Danfoss
PRODUCT INFORMATION
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GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Direct and indirect
exposure of drive to water
Dust Exposure
Mechanical Mounting
Clearance
Condensation
Enclosure type B1 B2/B3/B4
a [mm / inch] 100 / 3.94 200 / 7.87
b [mm / inch] 100 / 3.94 200 / 7.87
Drive installation
IP20 drives are intended for indoor or cabinet
mounting. Application example: drive fitted in
a machine room, basement or in an electrical
cabinet together with other electric / electronic
components such as the unit controller or
contactors.
For outdoor use the electrical cabinet must be
IP54 or the drive itself must be IP54. Application
example: rooftop units or condensing units.
If IP54 with LCP make sure that the gasket is
applied to ensure tightness.
It is recommended to place drive at least 30cm
from ground to protect against floods.
Avoid Dust forms and deposits on the surface
of the drive and inside on circuit boards and the
electronic components. These deposits act as
insulation layers and hamper heat transfer to
the ambient air, reducing the cooling capacity.
The components become warmer. This causes
accelerated aging of the electronic components,
and the service life of the unit decreases. Dust
deposits on the heat sink in the back of the unit
also decrease the service life of the unit.
The drive cooling fans have small bearings into
which dust can penetrate and act as an abrasive.
This leads to bearing damage and fan failure.
Under the conditions described above, it is
advisable to clean the frequency converter
during periodic maintenance. Remove dust off
the heat sink and fans and clean the filter mats.
For optimal cooling conditions, mount the drive
on vertical position. Allow a free air passage
above and below the frequency converter.
See Table below:
Horizontal mounting is NOT the preferred
position, however if unavoidable, lay PCB
on the left side (270°) to avoid condensation
accumulation on the electronics.
Condensation must always be avoided. There is a
specific risk of condensation when the frequency
converter or some of its components are
colder than moist ambient air. In this situation,
the moisture in the air can condense on the
electronic components.
• Operating with the frequency converter
constantly connected to the mains can help
to reduce the risk of condensation. Install a
cabinet heater in situations where there is a
real possibility of condensation due to ambient
conditions.
• If the drive is IP 20, then evaluate and prevent
possibility of condensation above drive.
Example: condensation on metallic frame above
drive, piping… If unavoidable, solutions like
cabinet heater, a pace heater, top hat on the
drive, insulation in the electric panel can be a
solution.
• Water resulting of condensation must not
accumulate on the bottom of electric panel.
Provide a drain for condensed water to run out
if necessary.
• No other forced cooling then internal drive fan.
PCB temp
dew
point
a
b
18 AB237586440343en-000601

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Drive installation
Ambient temperature The maximum ambient temperature for the drive
is 50°C.
Make sure that the clearance limits described
above are respected.
The drive must be installed on a wall or on a back
plate to ensure proper cooling.
Do not place the drive under direct sunlight.
Insulation inside the electrical panel can reduce
impact of sun radiation.
Test at the unit at highest ambient maximum
load is recommended. Look for over temperature
drive alarm.
The drive could operate lower to -10C with
proper operation, such as inside the cabinet,
install the space heater. However, LCP may not
function well under such low temperature.
19AB237586440343en-000601

GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
EMC installation
EMC best practices •Use screened (shielded) cables for motor, control
wiring and communication.
•Separate cables for input power, motor wiring
and control wiring. Failure to isolate power,
motor, control and communication cables
can result in unintended behavior or reduced
performance. Minimum 200 mm (7.9 in)
clearance between power, motor and control
cables is required.
•Ensure VFD proper grounding
•Motor cables should be as short as possible to
reduce noise level and leakage currents.
•Use the decoupling plate to fix and terminate
cables (Refer to EMC correct installation of an
frequency drive CDS303)
•Add ferrite cores on power lines and earth line if
necessary to pass EMC class A.
EMC correct installation
of an frequency drive
CDS303
PLC etc. Panel
Grounding rail
Decoupling plate
Cable insulation
stripped
All cable entries in
one side of panel
Motor cable
Motor, 3 phases and
protective ground
Reinforced protective ground
L1
L2
L3
PE
Mains supply
Control cables
PLC
Min. 0.025 in ²
(16 mm²)
Equalizing cable
Min. 7.9 in
(200 mm)
between control
cables, motor cable
and mains cable
EMC qualification reports are available upon request to Danfoss technical support.
Compressor
CDS303 drive Remediation (ferrite cores)
Power size Voltage RFI filter Drive input
Material: manganese zinc ferrite core Drive output Material: nickel zinc ferrite core
VZH052CJ 11kW T2 H2 - Y
VZH052CG 11kW T4 H2 Y Y
VZH065CG 11kW T4 H2 Y Y
VZH065CG 15kW T4 H2 Y Y
VZH065CG 15kW T4 H3 - -
EMC remediation For some models, ferrite cores need to be added
to the input and/or output of CDS303 drive, as a
remediation, to fulfil the Class A Group 1 emission
and immunity requirements.
SYSTEM DESIGN
20 AB237586440343en-000601