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PSH019
Application guide
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Application guide [zh]
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Danfoss PSH019, PSH039 Application guide

Application guidelines
Danfoss scroll compressors
PSH019 to PSH039
50 - 60 Hz - R410A
http://cc.danfoss.com
Content
GENERAL INFORMATION ................................4
PRODUCT INFORMATION ...............................5
Features ............................................................. 5
Compressor model designation ...................... 7
Technical specifications ................................... 8
Dimensions ....................................................... 9
Electrical data, connections and wiring ....... 12
Approvals and certificates .............................16
Pressure equipment directive 2014/68/EU ............ 16
SYSTEM DESIGN .............................................17
Design piping .................................................. 17
Design compressor mounting .......................19
Manage oil in the circuit ................................. 20
Manage sound and vibration ........................21
Manage operating envelope .........................22
Manage superheat..........................................25
Manage off cycle migration ........................... 27
Provide power supply and electrical
protection .......................................................28
Soft starts...............................................................................29
Control logic ....................................................30
Defrost logic recommendations / Reversible sys-
tems .........................................................................................30
Reduce moisture in the system .....................32
INTEGRATION INTO SYSTEM ........................33
Assembly line procedure ...............................33
Vacuum evacuation and moisture removal .............35
Commissioning ............................................... 36
ORDERING INFORMATION ............................39
3AB232986440751en-001301
General Information
PRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION GENERAL INFORMATION
Danfoss PSH019 to 039 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.
R
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.
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Features

Overview

Danfoss PSH019 to 039 compressor is optimized for heat pump application. Moreover, it benefits
from an improved design to achieve the highest efficiency and increased life time.
New PTFE spring seal for even lower leaks
Heat shield that lower the heat transfer between discharge and suction gas and the acoustic level
Pre-assembled liquid injection valve and injection channel
R410A heating optimized and dedicated scroll profile
Patented motor cap for optimal motor cooling and higher resistance to liquid slugging
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Lead free polymer bearings improve behavior under poor lubrication conditions
Pre-wired electrical box with liquid injection control board (aka. OCS, Operating Control System), integrate below protections:
- Phase sequence/loss
- Over high discharge temperature
- Injection valve shut-off when power loss by super capacitor
Patented motor centering spacer
Improved lower bearing centering
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Features

Liquid injection

GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Danfoss PSH019 to 039 requires liquid injection to maintain sufficiently low discharge gas temperature in the operating envelope. The PSH019 to 039 compressors are provided with a liquid injection connection.
The compressor’s liquid injection port should be connected to the system main liquid line after condenser & filter drier. The liquid phase refrigerant is directly injected into the compressor scroll set. Liquid refrigerant vaporize in the scroll and absorb the heat, result in cooling down the compressor’s discharge temperature.
A LIV (Liquid Injection Valve) is pre-installed on the PSH019 to 039 compressor to control the liquid injection mass flow, keep the constant compressor discharge gas temperature. The LIV’s liquid injection regulation is based on the discharge gas temperature measured via PT1000 temperature sensor located on discharge line. Considering the distance between PT1000 sensor and scroll set, the liquid injection is activated for when discharge temperature exceed 121°C (250°F) at the measurement point.
A Danfoss PT1000 temperature sensor is supplied with PSH compressor in the accessory bag. Customer need attach this sensor on the surface of discharge pipe with 40mm (1.6inch) away from the compressor discharge port, the sensor should be fixed by a metallic collar/clip tube, have good thermal contact by adding thermal paste and be insulated from ambient disturbance by thermal wrap.
PSH019 to 039 compressor’s OCS is equipped with super capacitor. In case of suddenly loss the power supply, super capacitor can use its stored energy to shut-off the LIV. This feature could secure compressor without having liquid migration via LIV, mitigate the compressor failure risk at next time start-up. Thanks to this feature, liquid injection line solenoid valve is not mandatory.
A minimum 4K (7.2°F) subcooling is necessary to ensure correct liquid injection.
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Filter drier
Condenser
Discharge T sensor
LIV
Control
Evaporator
EXV

Compressor model designation

Nomenclature

Heat pump
application
Scroll (commercial /
large commercial)
Lubricant
R410A, POE
Heating capacity
in kW at 50Hz
-7°C/50°C/SH5K/SC4K
19.4°F/122°F/SH9°F/7.2°F
Danfoss PSH019 to 039 scroll compressors for R410A are available as single and manifolding compressors. The example below presents the compressor nomenclature which equals to the
technical reference as shown on the compressor nameplate. Code numbers for ordering are listed in section “Ordering information”.
DLC4A039SHP
Evolution index
Motor protection type L: Internal overload protector
Connections A: simplified bare compressor(without oil
sight glass and oil equalization)
C: full package (including injection valve) D: bare compressor
Motor voltage code 3: 200-230V/3~/60Hz 4: 380-400V/3~/50Hz - 460V/3~/60Hz 9: 380V/3~/60Hz - 342-418V/3~/60Hz
UL index
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
7AB232986440751en-001301
Technical specifications

50-60 Hz data

Control board &
injection valve power
consumption
Swept volume
3
/rev cu.in/rev m3/h cu.ft/h dm
Displacement
Model
Nominal Heating
capacity
Power
Input
COP
W Btu/h kW W/W W cm
PSH019 19600 66938 6.62 2.96 3.9 88.40 5.39 15.40 544 3.0 101 58.5 129 PSH023 23000 78549 7. 47 3.07 3.9 103.50 6.32 18.00 636 3.3 112 64.5 142 PSH026 26000 88795 8.65 3.00 3.9 116. 90 7.13 20.30 717 3.3 112 64.5 142
50Hz
PSH030 30000 102455 9.60 3.13 3.9 133.0 0 8.12 23.12 816 3.3 112 67.5 149
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
PSH034 34200 11679 9 10.95 3 .12 3.9 151.17 9.22 26.40 932 3.3 112 69.5 153 PSH039 38900 132851 12.19 3.19 3.9 170.30 10. 39 29.60 1045 3.6 122 72.0 159 PSH019 23600 80598 7. 97 2.96 3.9 88.40 5.39 18 .60 657 3.0 101 58.5 129 PSH023 28000 95625 8.84 3.17 3.9 103. 50 6.32 21.80 770 3.3 112 64.5 142 PSH026 3140 0 107237 10.19 3.08 3.9 116 .90 7.13 24.60 869 3.3 112 64.5 142
60Hz
PSH030 35700 121922 11.35 3.15 3.9 133 .0 0 8.12 27. 90 985 3.3 112 67.5 149 PSH034 40500 138 315 12.72 3.18 3.9 151.17 9.22 31.90 112 7 3.3 112 69.5 153 PSH039 46500 158806 14.49 3.21 3.9 170 .30 10.39 35.80 126 4 3.6 122 72.0 159
Evaporating temperature: -7°C (19.4°F) Condensing temperature: 50°C (122°F) Superheat: 5K (9°F) Subcooling: 4K (7.2°F) Refrigerant: R410A
Displacement at nominal speed: 2900rpm at 50Hz. 3500rpm at 60HzNet weight with oil charge
Oil charge
3
oz kg lbs
Net weight
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Dimensions

Single compressors

ØD
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
H
H2
H1
L3
190.5 (x2)
(7.5 inch) (x2)
30°±0.5°
L1
Outline drawing
number
Compressor model
4 x hole Ø19.05 (0.75 inch)
190.5 (7.5 inch) (x2)
L2
30°±1°
D H H1 H2 L1 L2 L3
mm inch mm inch mm inch mm inch mm inch mm inch mm inch
PSH019 243 9.57 485 19.09 235 9.25 451 17.76 206 8.11 230 9.06 230 9.06 8560052
PSH023-023-030-034 243 9.57 542 21. 34 278 10.94 509 20.04 206 8.11 230 9.06 230 9.06 8560053
PSH039 243 9.57 558 21.97 299 11.7 7 524 20.63 206 8 .11 230 9.06 230 9.06 8560054
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Dimensions

Connection Details

PSH019 PSH023-026-030-034-039
Suction connection Brazed 1"1/8 Brazed 1"3/8
Discharge connection Br aze d 7/8 " Br aze d 7/8 "
Liquid injection connection 5/16" ODF
Oil sight glass Threaded (1"1/8 – 18 UNEF)
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Oil equalization connection Rotolock 1"3/4
Low pressure gauge port (Schrader) Male ¼" Flare incorporating a Schrader valve
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Dimensions

Tandem assemblies

L1
H
L
H1
D
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
L D H L1 H1
Tandem model Composition
mm inch mm inch mm inch mm inch mm inch
Outline drawing
number
PSH038 2×PSH 019 937 36.89 452 17. 80 507 19.96 240 9.45 152 5.98 5216818
PSH046-052-060-068 2×PSH023-026-030-034 937 36.89 452 17. 80 564 22.20 240 9.45 152 5.98 5216818
PSH078 2×PSH039 937 36.89 452 17.80 580 22.83 240 9.45 152 5.98 5216818
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Electrical data, connections and wiring

Motor voltage

GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
50Hz
60Hz
Motor voltage code Code 3 Code 4 Code 9
Nominal voltage - 380-400V - 3ph -
Voltage range - 342-440V -
Nominal voltage 200-230V - 3ph 460V - 3ph 380V- 3ph
Voltage range 180 -253V 414-50 6V 342-418 V
Danfoss PSH019 to 039 compressors are available in three different motor voltages as listed below;
The maximum allowable voltage imbalance is 2%. Voltage imbalance causes high amperage over one or several phases, which in turn leads to
| Vavg - V1-2 | + | Vavg - V1-3 | + | Vavg - V2-3 | % voltage imbalance= __________________________________________________ x100 2 x Vavg
Vavg = Mean voltage of phases 1, 2, 3 V1-2 = Voltage between phases 1 & 2

Wiring Connections Electrical supply is connected to the compressor

terminals by Ø 4.8mm (3/16") screws. The maximum tightening torque is 3Nm. Use a ¼" ring terminal on the power leads. The compressor must be connected to earth with the 5mm (0.2inch) earth terminal screw.
The control board comes pre-installed within the terminal box of full package compressor. The control board comes with pre-wired liquid injection valve connection, is used to provide
overheating and possible motor damage. Voltage imbalance is given by the formula:
V1-3 = Voltage between phases 1 & 3 V2-3 = Voltage between phases 2 & 3
control of liquid injection valve according to feedback of discharge temperature sensor. The discharge gas temperature cable must be plugged to the discharge temperature sensor installed on discharge tube by customer.
In electrical box, three wires are pre-installed between terminals and control board to monitor the phase sequence and phase loss. This could avoid compressor running at abnormal electrical supply and protect the compressor.
The control board must be connected to:
• a power supply of the appropriate voltage (230VAC) with a 2 poles 7.62mm (0.3inch) pitch terminal block (an independent power supply is recommended).
• a 1/4" fasten earth connection for 230V supply models.
Control board power supply
3 phase sequence/loss protection(pre-wired)
Discharge temperature
LED1 LED2
sensor PT1000
Liquid injection valve control(pre-wired)
Relay output M1-M2
TTL communication port
Liquid injection valve control
Plug and unplug connector on board with electricity is forbidden. Never touch board with electricity by hand or tool. Cable connected to control board can not be short circuit or connect to high voltage.
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Electrical data, connections and wiring
Two LED indicators are located on control board as picture showed above.
LED1 is the control board power supply status indicator. When the power supply is ON, the LED1 presents GREEN color. LED2 is the protection
status indicator. When there is no alarm, the LED2 presents GREEN color. When there is a alarm, the LED2 presents YELLOW/RED color blinking code. More detail blinking code information refer to related section.

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 object
5- Dust protected
Second numeral, level of protection against water
4- Protection against water splashing

Terminal box temperature

The temperature inside the terminal box
R
may not exceed 70°C (158°F). 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 control board may not operate properly. Any compressor damaged 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 (158°F).
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
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Electrical data, connections and wiring

Three phase electrical characteristics

GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
Compressor models
Motor code 3
Motor code 4
Motor code 9
LRA MCC MOC Winding resistance
A A A Ω
PSH019 203 43 38 0.39
PSH023 267 51 50 0.27
PSH026 267 61 53 0. 27
PSH030 304 64 56 0.24
PSH034 315 69 64 0.22
PSH039 351 75 71 0.22
PSH019 98 20 19 1.47
PSH023 142 23 22 1.05
PSH026 142 29 24 1.05
PSH030 147 32 28 0.92
PSH034 158 33 31 0.83
PSH039 197 38.6 36 0.83
PSH019 124 26 23 1.05
PSH023 160 33 26 0.72
PSH026 160 35 29 0.72
PSH030 168 37 33 0.62
PSH034 177 41 37 0.57
PSH039 239 51 44 0.57

LRA (Locked Rotor Amp)

MCC (Maximum Continuous Current)

MOC (Maximum Operating Current)

Locked Rotor Amp value is the highest average current as measured on mechanically blocked compressor tested under nominal voltage. The LRA value can be used as rough estimation for
The MCC is the current at which the motor protection trips under maximum load and low voltage conditions. This MCC value is the
The MOC is the current when the compressors operates at maximum load conditions and 10% below nominal voltage. MOC can be used to select cables and contactors.
the starting current. However in most cases, the real starting current will be lower. A soft starter can be applied to reduce starting current (See section “soft star t”).
maximum at which the compressor can be operated in transient conditions and out of the application envelope.
In normal operation, the compressor current consumption is always less than the MOC value.
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