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PSH019
Application guide
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Danfoss PSH019, PSH039 Application guide

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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.
4 AB232986440751en-001301

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
8 AB232986440751en-001301

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
9AB232986440751en-001301
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
10 AB232986440751en-001301
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
11AB232986440751en-001301

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.
12 AB232986440751en-001301
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
13AB232986440751en-001301
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.
14 AB232986440751en-001301
Electrical data, connections and wiring
Winding resistance

Motor protection

Phase sequence/loss protection
Winding resistance is the resistance between phases at 25°C (77°F) (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 different value than 25°C (77°F), the measured resistance must be corrected with following formula:
The compressors models PSH019 to 039 have been provided with an internal overload protection to prevent against excessive current and temperature caused by overloading, low refrigerant flow or phase loss. The cutout current is the MCC value listed before.
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
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.
a + t R
= R
amb
25°C (77°F)
a + t t
: reference temperature = 25°C (77°F)
25°C (77°F)
t
: temperature during measurement °C(°F)
amb
R
: winding resistance at 25°C (77°F)
25°C (77°F)
R
: winding resistance at tamb
amb
amb
__________
25°C (77°F)
Coefficient a = 234.5
not compulsory, an additional external overload is still advisable for either alarm or manual reset.
Then it must be set below MCC value:
• 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 offering possibility of manual reset.
determine the cause of the phase problem before re-energizing the control circuit.
The phase sequence and phase loss monitoring functions are active during a 5 seconds window 1 second after compressor start-up (power on L1-L2-L3).
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
R
PSH019 to 039 control board provides protection against phase reversal and phase loss at start­up. Apply the recommended wiring diagram from the section “Wiring information”. The circuit should be thoroughly checked in order to
LED2 status display Blinking sequence Status
••••••••••••
••••••••••••
••••••••••••
Continuous on No alarm
Yellow 2 times/Red 1 time
Yellow 2 times/Red 2 time
The pre-wired lines between compressor power terminals and control board are NOT allowed to disconnect! Disconnection of those pre-wired lines may loss this protection and cause other function abnormal.
ALARM: Phase loss error
ACTION: Relay output M1-M2 open, compressor
RESET: Power off, power on the OCS board
ALARM: Phase sequence error
ACTION: Relay output M1-M2 open, compressor
RESET: Power off, power on the OCS board
stopped
stopped
15AB232986440751en-001301
Approvals and certificates
Approvals and certificates
Pressure equipment
GENERAL INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION PRODUCT INFORMATION
directive 2014/68/EU

Low voltage directive 2014/35/EU

PSH019 to 039 scroll compressors comply with the following approvals and certificates.
CE 0062 or CE 0038 or CE0871 (European Directive)
UL (Underwriters Laboratories)
Other approvals / certificates Contact Danfoss
Products PSH019 to 039
Refrigerating fluids Group 2
Category PED II
Evaluation module D1
Maximum/Minimum temperature - Ts -35°C < Ts < 55°C (-31°F < Ts < 131°F)
Maximum allowable pressure (Low side) - Ps 33.3 bar(g) (483psig)
Declaration of conformity Contact Danfoss
Products PSH019 to 039
Declaration of conformity ref. Low voltage Directive 2014/35/EU
Certificates are listed on the product datasheets: http://www.danfoss.com/odsg
All PSH models
All 60 Hz PSH models
Contact Danfoss

Machines directive

2006/42/EC

Internal free volume

Products PSH019 to 039
Manufacturer's declaration of incorporation ref. Machines Directive 2006/42/EC
Products Internal free volume without oil
PSH019 12. 4 757
PSH023-026-030-034 14. 3 873
PSH039 14.6 891
Contact Danfoss
litre cu.inch
16 AB232986440751en-001301

Design piping

General requirements Proper piping practices should be employed to:

1. Ensure adequate oil return, even under minimum load conditions (refrigerant speed, piping slopes…). For validation tests see section “Manage oil in the circuit”.
To condenser
HP
max. 4m
(13ft)
max. 4m
(13ft)
0.5% slope
4m/s (13ft/s) or more
U-trap, as short as possible
8 to 12m/s (26 to 40ft/s)
0.5% slope
4m/s (13ft/s) or more
U trap, as short as possible
LP
Evaporator
2. Avoid condensed liquid refrigerant from draining back to the compressor when stopped (discharge piping upper loop). For validation tests see section “Manage off cycle migration”.
General recommendations are described in the figures below:
Upper loop
HP
Condenser
LP
3D exibility
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
3. Piping should be designed with adequate three-dimensional flexibility to avoid excess vibration. It should not be in contact with the surrounding structure, unless a proper tubing
mount has been installed. For more information on noise and vibration, see section on: “Sound and vibration management”.
17AB232986440751en-001301
Design piping
Tandem Configuration
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
PSH019 to 039 are qualified with even tandem combination use static system to balance the oil level between the compressors.
- Tubings, according to specific outline drawings indicated in the following table.
- Tandem kit.
- Compressors.
By default, PSH tandems are not factory-built. To complete an assembly in the field, you will need:
Tandem
configuration
PSH019 +PSH019 1"3/8 1"3/8 1"1/8 5216 818 7777054 PSH023+PSH023 1"5/8 1"3/8 1"1/8 5216818 7777054
PSH026+PSH026 1"5/8 1"3/8 1"1/8 5216818 7777054 PSH030+PSH030 1"5/8 1"3/8 1"1/8 5216818 7777054 PSH034+PSH034 1"5/8 1"3/8 1"1/8 5216818 7777054
PSH039+PSH039 1"5/8 1"3/8 1"1/8 5216818 7777054
Suction Discharge
Oil equalization
line
Outline drawing
number
Tandem kit
Oil Equalization Detail
7/8 "
Discharge 1"3/8
Suction 1"3/8 PSH019 tandem 1"5/8 PSH023-039 tandem
Supplied with the compressor
Included in tandem kit
Not supplied
Oil equalisation 1"1/8
1"1/8 PSH019 tandem 1"3/8 PSH023-039 tandem
Tightening torque 100N.M
18 AB232986440751en-001301

Design compressor mounting

General requirements

Single requirements

Tandem Kits

Compressors used in single applications must be mounted with flexible grommets.
Compressors used in parallel applications must be mounted with rigid spacers onto rails and
Compressor PSH019 to 039 are delivered with rubber grommets and steel mounting sleeve used to isolated the compressor from the base frame.
The grommets must be compressed until contact between the flat washer and the steel mounting sleeve is established. The required bolt size for the PSH019 to 039 compressors is HM8-40. This bolt must be tightened to a torque of 15Nm.
The compressors must be mounted with rigid mounting spacers on rails. Rubber grommets and spacers must be installed below rails.
the manifold assembly must be mounted with flexible grommets onto the frame.
During operation, the maximum inclination from the vertical plane must not exceed 3 degrees.
HM 8 bolt
Lock washer
Flat washer
Steel mounting sleeve
Rubber grommet
Nut
Tightening torque 15 Nm
15 mm
The rigid mounting spacers are included in tandem accessory kits. The rubber grommets are supplied with compressor.
For more details about parallel mounting feet, please see parallel unit outline drawing.
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Not supplied Φ8x75mm
0.31x2.95inch
Tightening torque 15Nm
4mm (0.16inch) thickness
Supplied with the compressor Included in tandem kit Not supplied
Tightening torque 15Nm
19AB232986440751en-001301

Manage oil in the circuit

Requirement

System evaluation

R
Oil level must be visible or full in the sight glass when the compressor is running and when all compressors of the circuit are stopped.
Single compressor Manifold compressors
Non split Tes t N °1 Tes t N° 1+2
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN

Test, criteria and solutions

Tes t N ° Purpose Test conditions Pass criteria Solutions
1
2
Check proper oil return
Check oil balancing
Split Te st N °1+3 Test N° 1+2+3
A
Lowest foreseeable evaporation, and highest foreseeable condensation.
Minimum number of compressor
running for 6 hours.
For reversible system, perform test in both heating and cooling mode.
A
Lowest foreseeable evaporation, and highest foreseeable condensation. All compressor running for 6 hours.
For reversible system, perform test in both heating and cooling mode.
Oil level must be visible or full in the sight glass when the compressor is running and when all compressors of the circuit are stopped.
Oil level must be visible or full in the sight glass when the compressors are running and when all compressors of the circuit are stopped
1. Top-up with oil, generally 3% of the total system refrigerant charge (in weight). Above 3% look for potential oil trap in the system.
2. Integrate a function in control logic to run all compressors simultaneously in order to boost oil return (for more details see section “Control Logic”)
3. Oil separator can be added
1. Top-up with oil, generally 3% of the total system refrigerant charge (in weight).
2. Check that manifold piping is conform to Danfoss requirements.
3. Integrate a function in control logic to stop manifold periodically in order to balance oil (for more details see section “Control Logic”)
3
Oil return in split systems
20 AB232986440751en-001301
Since each installation is unique, test 1 and 2 can not fully validate the oil return. Oil level must be checked and adjusted at commissioning.
Oil level must be visible or full in the sight glass when the compressor is running and when all compressors of the circuit are stopped.
1. Pay special attention to “Piping design”
2. Oil separator is strongly recommended, espacially in case of part load.

Manage sound and vibration

Compressor sound radiation

Mechanical vibrations

Typical sounds and vibrations in systems can be broken down into the following three categories:
• Sound radiation (through air)
• Mechanical vibrations (through parts and structure)
For sound radiating from the compressors, the emission path is air and the sound waves are travelling directly from the machine in all directions.
Sound power
dB(A)
PSH019 75 77
PSH023 76.5 78.5
PSH026 77.5 79
PSH030 77. 5 79
PSH034 79 81
PSH039 78 80
Sound Power and attenuation are given at -7/50°C condition.
Sound power dB(A)
50Hz 60Hz
A compressor generates come from vibrations that propagate into the surrounding parts and structure. The vibration level of a PSH019 to 039 compressor alone does not exceed 120μm peak to peak. However, when system structure natural frequencies are close to running frequency, vibrations are amplified due to resonance phenomenon.
• Gas pulsation (through refrigerant) The following sections focus on the causes and methods of mitigation for each of the above sources.
Sound levels are as follows:
• For compressors running alone:
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
requirements (mounting feet, rails etc..). For further information on mounting requirements, please refer to section “Design compressor mounting”.
2. Ensure that there is no direct contact (without insulation) between vibrating components and structure.

Gas pulsation

A high vibration level is damageable for piping reliability and generates high sound levels.
Mitigations methods:
1. To ensure minimum vibrations transmission to
the structure, strictly follow Danfoss mounting
PSH019 to 039 have been designed and tested to ensure that gas pulsation is optimized for the most commonly encountered air conditioning pressure ratio. Manifolded compressors are equivalents to lagged sources of gas pulsation. Therefore, pulse level can vary during time.
3. To avoid resonance phenomenon, pipings and frame must have natural frequencies as far as possible from running frequencies (50 or 60Hz). Solutions to change natural frequencies are to work on structure stiffness and mass (brackets, metal sheet thickness or shape…)
Mitigations methods:
If an unacceptable level is identified, a discharge muffler with the appropriate resonant volume and mass can be installed.
21AB232986440751en-001301
Condensing temperature (°C)
Condensing temperature (°F)
Evaporating temperature (°C)
Evaporating temperature (°F)

Manage operating envelope

Requirement

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
R
The operating envelope for PSH019 to
039 scroll compressor is given in the figure below and guarantees reliable operations of the compressor for steady-state operation. The discharge temperature is controlled by OCS and limited at 131°C (268°F) (at PT1000
-31 -22 -4 14 32 50 68-13 5 23 41 59 77
70
60
50
40
30
20
measurement location). Steady-state operation envelope is valid for a suction superheat within 5K (9°F) to 30K (54°F) range at nominal voltage. And a subcooling below 4K (7.2°F) is not recommended to ensure proper liquid injection.
S.H. = 5K (9°F)
158
140
122
104
86
68
10
-35 -30 - 20 -10 0 10 20-25 -15 -5 5 15 25
Working range high side
Working range low side
Maximum high pressure safety switch setting
Minimum low pressure safety switch setting
Minimum low pressure pump-down switch setting
Pressure settings R410A
bar(g) 13.6-44.4
psig 197-64 4
bar(g) 1.7-15.7
psig 25 -228
bar(g) 4 6.1
psig 669
bar(g) 1.5
psig 22
1.5 bar below nominal evap. pressure with
bar(g)
minimum of 1.7 bar(g) 22 psi below nominal evap. pressure with
psig
minimum of 25psig
50
22 AB232986440751en-001301
Manage operating envelope

High and low pressure protection

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Low-pressure (LP) and high-pressure (HP) safety switches must never be bypassed nor delayed and must stop all the compressors.
LP switch auto restart must be limited to 5 times within 12 hours.
HP safety switch must be reset manually.
Depending on application operating envelope, you must define HP and LP limits within operating envelope and pressure setting table above.

Discharge gas temperature (DGT) protection

PSH compressor is equipped with DGT sensor PT1000 linked to OCS board. DGT is permanently monitored by OCS board. OCS has a relay function so called M1-M2 connected to unit safety chain.
If the DGT is higher than tripping set point (default is 131°C (268°F)) for more than 1 second, DGT protection is activated, relay output M1­M2 is open. This DGT protection function is automatically reset when the DGT is lower than reset set point (default is 106°C (223°F)) for more than 5 minutes.
LED2 status display Blinking sequence Status
••••••••••••
••••••••••••
••••••••••••
Continuous on No alarm
Yellow 1 time/Red 1 time
Yellow 1 time/Red 2 times
If DGT protection occurs more than 5 times within a 1 hour window, relay M1-M2 open and OCS requires manual reset. Manual reset is done by power off, power on the OCS board
If DGT measurement is out of range (-50°C (-58°F) to 180°C (356°F)), or if a fault is detected on sensor, relay M1-M2 open and OCS requires manual reset.
ALARM: DGT too high, automatic reset delay on-going
ACTION: Relay output M1-M2 open, compressor stopped
RESET: Automatic reset after DGT lower than reset set point
for more than 5 minutes, no more than 5 times/hour
ALARM: DGT too high, more than 5 times/hour
ACTION: Relay output M1-M2 open, compressor stopped
RESET: Power off, power on the OCS board
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
••••••••••••
••••••••••
Yellow 1 time/Red 3 times
Yellow 1 time/Red 4 times
ALARM: DGT sensor out of PT1000 range
ACTION: Relay output M1-M2 open, compressor stopped
RESET: Power off, power on the OCS board
ALARM: DGT sensor short/open
ACTION: Relay output M1-M2 open, compressor stopped
RESET: Power off, power on the OCS board
23AB232986440751en-001301
Manage operating envelope

System evaluation HP and LP must be monitored to respect

operating envelope limitations. We consider two types of operating envelope management:
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN

Test, criteria and solutions

Tes t N ° Purpose Test condition Pass criteria Solutions
1
2
compressor
operate within
Ensure
envelope
Basic:
• HP and LP switch
• MOP (Max Operating Pressure) ensured by expansion device
• Condensing pressure control
See “Test, criteria and solutions”
DGT
LP switch setting
Condensing pressure control
Start test at minimum foreseeable
evaporating temperature (minimum
ambient temerature...)
Continuous running within envelope
Perform a defrost test if reversible
unit
Advanced:
• HP and LP sensor
• Operating envelope limits integrated into control logic
HP switch setting
MOP < Max evap T°
tests N
o
1 and 2
Work on compressor staging, fan
staging, water flow etc.
24 AB232986440751en-001301

Manage superheat

During normal operation, refrigerant enters the compressor as a superheated vapor. Liquid flood back occurs when a part of the refrigerant
Liquid flood back can cause oil dilution and, in extreme situations lead to liquid slugging that can damage the compressor.
entering the compressor is still in liquid state.

Requirement

In steady state conditions the expansion device must ensure a suction superheat within 5K to 30K (9 to 54°F).

System evaluation

Use the table in relation with the application to quickly evaluate the potential tests to perform.
Application Tests to perform
Non reversible Liquid flood back test
Reversible
Liquid flood back test

Test, criteria and solutions

Tes t N ° Purpose Test condition Pass criteria Solutions
A
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Defrost test
Steady-state
Liquid flood back test
Transient
Check liquid
Defrost test
*Suction accumulator offers protection by trapping the liquid refrigerant upstream from the compressor. The accumulator should be sized at least 50 % of the total system charge. Suction accumulator dimensions can impact oil return (gas velocity, oil return hole size…), therefore oil return has to be checked according to section “Manage oil in the circuit”.
floodback during defrost cycle
Liquid flood back testing must be carried out under expansion valve threshold operating conditions:
• Lowest foreseeable evaporation, and highest foreseeable condensation.
• Minimum number of compressor running.
For reversible system, perform test in both heating and cooling mode.
Tests must be carried out with most unfavorable conditions :
• fan staging,
• compressor staging
• …
Defrost test must be carried out in the most unfavorable conditions (at 0°C (32°F) evaporating temperature).
Suction superheat >5K (9°F)
Oil superheat shall not be more than 30 sec below the safe limit defined in the Dilution Chart. (see graph below)
Oil superheat shall not be more than 30 sec below the safe limit defined in the Dilution Chart. (see graph below)
1. Check expansion valve selection and setting.
• For Thermostatic expansion valve (TXV) check bulb position...
• For Electronic expansion valve (EXV) check measurement chain and
PID....
2. Add a suction accumulator*.
1. Check defrost logic. In reversible systems, the defrost logic can be worked out to limit liquid floodback effect. (for more details see “Control Logic”).
2. Add a suction accumulator*.
25AB232986440751en-001301
Manage superheat
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Oil temperature sensor must be placed between the oil sight glass and the compressor baseplate. Some thermal paste shall be used to improve the conductivity. The sensor must also be correctly thermally insulated from the ambiance.
The Oil superheat is defined as: (Oil temperature - Evaporating temperature)
PSH019 to PSH039
Dilution Chart (reference at 20°C / 68°F ambient temperature)
-13-22 -4 5142332415059687786
30
27.5
25
22.5
20
17.5
15
12.5
Oil Superheat (K)
10
7.5
5
2.5
0
-25-30 -20 -15 -10 -5 051015202530
Evaporating Temperature °F
Safe Area
Unsafe Area
54
49.5
45
40.5
36
31.5
27
22.5
Oil Superheat (°F）
18
13.5
9
4.5
0
Evaporating Temperature °C
26 AB232986440751en-001301
Manage off cycle migration

Requirement

System evaluation

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Off -cycle refrigerant migration happens:
• when the compressor is located at the coldest part of the installation, refrigerant vapor condenses in the compressor.
• or directly in liquid-phase by gravity or pressure
the refrigerant diluted in the oil, or stored in evaporator, generates poor lubrication conditions, and may reduce bearings life time. In extreme situations, this leads to liquid slugging that can damage the compressor scroll set.
difference. When the compressor restarts,
• Compressor can tolerate occasional flooded start, but it should remain exceptional situation and unit design must prevent that this situation happen at each start.
• Right after start, liquid refrigerant must not flow massively to compressor.
• The charge limit is a threshold beyond some
protective measures must be taken to limit risk of liquid slugging and extreme dilution at start.
Use the table below in relation with the system charge and the application to quickly define necessary safeties to implement.
Application BELOW charge limit ABOVE charge limit
Ensure tightness between condenser & evaporator when system is OFF
All
Non split
Split
• Thermostatic expansion Valve (TXV) , Liquid Line Solenoid Valve LLSV** strongly recommended
• Electronic expansion valve (EXV) must close when system stop including in power shut down situation
External Non-return Mandatory for unit with water condenser (W/W or reversible A/C Chiller)
Since each installation is unique, refrigerant charge may vary
• Surface Sump Heater *
• Liquid Line Solenoid Valve**+ pump-down cycle
• External Non-Return Valve
• Surface Sump Heater *
• External Non-Return Valve
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
*Surface Sump heater The surface sump heaters are designed to protect the compressor against off-cycle migration of refrigerant. For PSH019 to 039, the surface sump heater is located on the compressor shell.
The heater must be turned on whenever all the compressors are off. Surface sump heater accessories are available from Danfoss (see section “Accessories”).
**Liquid line solenoid valve (LLSV) A LLSV is used to isolate the liquid charge on the condenser side, thereby preventing against charge transfer to the compressor
Charged limits are defined in the table below:
Model
PSH019 5.9 13
PSH023-026-030-034-039 7.9 17
Refrigerant charge limit
in the compressor
kg lbs
PSH019 to 039
during off -cycles. The quantity of refrigerant on the low-pressure side of the system can be further reduced by using a pump-down cycle in association with the LLSV.
27AB232986440751en-001301

Provide power supply and electrical protection

CONTROL CIRCUIT
85 52 019 - A

Wiring information

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Requirements:
PSH019 to 039 models are delivered with an integrated phase protection and discharge temperature protection on the liquid injection control board in electrical box.
• HP safety switch and control board output (M1­M2 relay) must be wired in the safety chain. Other safety devices such as LP switch can be either
• Provide separate electrical supply for the sump heater so that they remain energized even when the machine is out of service (e.g. seasonal shutdown).
• Provide separate electrical supply to liquid injection control board. Normally the control board should be energized together with the unit controller.
hardware or software managed.
The wiring diagrams below are examples for a safe and reliable compressor wiring:
L1 L3 L2
F1F1
KA KS
KA KA
A1
A3
180 s
A2
KS
TH
LPS
HP
OCS
J1 J3
T1
J2
J5
PT1000
Q1
T2
T3
M
KM KA
Legend:
Fuses .............................................................................................................F1
Compressor contactor ............................................................................KM
Control relay ..............................................................................................KA
Safety lock out relay ................................................................................. KS
Optional short cycle timer (3min).....................................................180 s
High pressure safety switch....................................................................HP
Fused disconnect ......................................................................................Q1
Compressor motor .................................................................................... M
Discharge gas temperature ................................................................DGT
Safety pressure switch ........................................................................... LPS
Control circuit ............................................................................................CC
Operating Control System ..................................................................OCS
KS
28 AB232986440751en-001301
Provide power supply and electrical protection
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Soft starts Soft starters are designed to reduce the

starting current of 3-phase AC motors. Soft starter must be set so compressor start-up time is always less than 0.5 seconds to ensure proper lubrication of compressor parts.
Selection table:
Compressor model
PSH019 MCI15C MCI15c PSH023 to 030 MCI25C MCI25C* PSH034 to 039 MCI50CM MCI50CM
* by-pass contactor K1 is required
• MCI15C, MCI25C, MCI50CM replaces the contactor KM . All settings such as initial torque, ramp-up time (less than 0.5 sec) and ramp­down time are preset and do not require any modification.
See wiring diagram:
Soft start reference Ambient max. 40°C
Ramp-down must be set to minimum to ensure proper discharge valve closing. Danfoss MCI soft-start controller are available as accessories: MCI can reduce the inrush current up to 40%.
Soft start reference Ambient max. 55°C
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
• MCI25C* requires a by-pass contactor K1. This configuration is needed to withstand current or temperature levels. 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 modification.
See wiring diagram:
29AB232986440751en-001301

Control logic

Safety control logic requirements

Safeties
HP safety switch
LP safety switch
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Integrated protection (phase
sequence/loss, DGT)

Cycle rate limit requirements

Oil management logic recommendations

Tripping conditions Re-start conditions
Value Time Value Time
See Pressure settings table
from section “Manage
operating envelope”
Contact M1-M2 opened
Immediate, no delay.
No by-pass
Danfoss requires a minimum compressor running time of 3 minutes to ensure proper oil return and sufficient motor cooling.
In some cases, oil management can be enhanced by control logic:
• If oil return test failed, a function can be integrated in control logic to run all compressors simultaneously during 2 minutes every hour in order to boost oil return. Time and delay can be fine-tuned by oil return test N°1 in section “Manage oil in the circuit”. During oil boost, pay special attention to superheat management to avoid liquid flood back.
Manual reset
Maximum 5 auto reset during
Conditions back to normal.
Switch closed again
a period of 12 hours, then
manual reset.
Maximum 5 auto reset during
a period of 12 hours, then
manual reset.
Additionally, compressor must not exceed 12 starts per hour.
• In manifold system, after running long time in full load, oil unbalance may appears. A function can be implemented in control logic to stop all manifold compressors during one minute every two hours in order to balance oil. Time and delay can be fine-tuned by Oil balancing test N°2 in section “Manage oil in the circuit”.

Defrost logic recommendations / Reversible systems

Compressor 1
Compressor 2
4WV
EXV
ON
ON
Heating
100%
In reversible systems, the defrost logic can be worked out to limit liquid flood back effect by:
1. Running full load during defrost to share liquid refrigerant between all compressors.
The following defrost logic combines both advantages:
2. Reducing refrigerant flooding to compressor by transferring liquid refrigerant from one exchanger to the other before reversing valve thanks pressures.
Defrost
Defrost start. Stop all compressors
* EXV Opening degree and time have to be set to keep a minimum pressure for 4 way valve moving. In any case, defrost logics must respect requirements and tests described in sections “Manage superheat” and “Manage operating envelope”.
In reversible systems, to ensure compressor reliability, the 4-way valve must not reverse when the compressor is stopped due to heating or
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cooling demand (stop on thermostat).
30 AB232986440751en-001301
4 Way Valve (4WV) stays in heating
mode.
EXV opened to transfer liquid from
outdoor to indoor exchanger thanks
to pressure difference
When pressures are almost balanced*,
Start Cp1 and Cp 2 with 0.5 seconds
change 4WV to cooling mode.
delay between 2 successive starts
4 WV stays in cooling mode.
Defrost end. Stop all compressors
EXV opened to transfer liquid from
indoor to outdoor exchanger thanks
to pressure difference
When pressures are almost balanced*,
Start Cp1 and Cp 2 with 0.5 seconds
change 4WV to heating mode.
delay between 2 successive starts
Control logic

Pump-down logic recommendations

Pump down is initiated prior to shutting down the last compressor on the circuit by de-energizing a liquid line solenoid valve or closing electronic expansion valve. When suction pressure reached the cut-out pressure, compressor is stopped, and liquid solenoid valve or electronic expansion valve remains closed. Two types of pump-down exist:
For PSH019 to 039 compressors, an external Non-Return Valve (NRV) in the discharge line is recommended.
• One shot pump down (preferred): when last compressor of the circuit stops, suction presssure is decreased 1.5 bar (22 psi) below nominal evaporating pressure with minimum of 1.7 bar(g) (25 psig). Even if suction pressure increases again, the compressor will not restart.
• Continuous pump-down: traditional pump­down, Compressor restarts automatically when suction pressure increases up to 4 cycles maximum.
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
31AB232986440751en-001301

Reduce moisture in the system

Requirements

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN

Solutions

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Excessive air and moisture
• can increase condensing pressure and cause high discharge temperatures.
• can create acid giving rise to copper platting.
• can destroy the lubricating properties of the oil.
PSH019 to 039 compressors are delivered with < 100ppm moisture level. At the time of commissioning, system moisture content may be up to 100ppm.
To achieve this requirement, a properly sized and type of drier is required. Important selection criteria’s include:
• driers water content capacity,
• system refrigeration capacity,
• system refrigerant charge.
All these phenomena can reduce service life and cause mechanical and electrical compressor failure.
During operation, the filter drier must reduce this to a level between 20 and 50ppm.
For new installations with PSH019 to 039 compressors with polyolester oil, Danfoss recommends using the Danfoss DML (100% molecular sieve) solid core filter drier.
32 AB232986440751en-001301

Assembly line procedure

R

Compressor storage

Compressor holding charge

Handling

Store the compressor not exposed to rain, corrosive or flammable atmosphere between
-35°C (-31°F) and 70°C (158°F) when charged
Each compressor is shipped with a nominal dry nitrogen holding charge between 0.3bar (4psi) and 0.7bar (10psi) and is sealed with elastomer plugs.
Respect the following sequence to avoid discharge check valve gets stuck in open position:
Each Danfoss PSH019 to 039 scroll compressor is equipped with two lift rings on the top shell.
• Always use both these rings when lifting the compressor.
• Use lifting equipment rated and certified for the weight of the compressor or compressor assembly.
• A spreader bar rated for the weight of the compressor is highly recommended to ensure a better load distribution.
with nitrogen and between -35°C (-31°F) and Ts max value (see section "Pressure equipment directive") when charged with R410A refrigerant.
• Remove the suction plug first
• Remove the discharge plug afterwards
An opened compressor must not be exposed to air for more than 20 minutes to avoid moisture is captured by the POE oil.
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
• The use of lifting hooks closed with a clasp is
recommended.
• For tandem and trio assemblies, use a spreader
bar and all compressor rings as shown in picture below.
• Never use the lift rings on the compressor to lift
the full unit.
Maintain the compressor in an upright position during all handling manoeuvres (maximum of 15° from vertical).
HEAVY
do not lift
manually
Spreader bar
Spreader bars
Slings
Frame
33AB232986440751en-001301
Assembly line procedure

Piping assembly Good practices for piping assembly is a pre-requisite to ensure compressor life time (system

cleanliness, brazing procedure etc.)
System cleanliness
Circuit contamination possible cause: Requirement:
Brazing and welding oxides During brazing, flow nitrogen through the system.
Particles and burrs
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNORDERING INFORMATION INTEGRATION INTO SYSTEM
Moisture and air
Remove any particles and burrs generated by tube cutting and hole drilling.
Use only clean and dehydrated refrigeration grade copper tubing. Opened compressor must not be exposed to air more than 20 minutes to avoid moisture captured by oil.
Brazing procedure:
• Brazing operations must be performed by qualified personnel.
• Make sure that no electrical wiring is connected to the compressor.
• To prevent compressor shell and electrical box overheating, use a heat shield and/or a heat­absorbent compound.
• Clean up connections with degreasing agent
• Flow nitrogen through the compressor.
• Use flux in paste or flux coated brazing rod.
• Use brazing rod with a minimum of 5% silver content.
Before eventual un-brazing of the compressor or any system component, the refrigerant charge must be removed.

System pressure test and leak detection The compressor has been strength tested

and leak proof tested (<3g/year) at the factory. For system tests:
• Always use an inert gas such as Nitrogen or
Helium.
• It is recommended to use double-tipped torch using acetylene to ensure a uniform heating of connection.
• For discharge connections brazing time should be less than 2 minutes to avoid NRVI damages if any.
• To enhance the resistance to rust, a varnish on
the connection is recommended.
heat shield
C
A
B
• Pressurize the system on HP side first then LP side.
• Do not exceed the following pressures indicated in table below
34 AB232986440751en-001301
Maximum compressor test pressures PSH019-023-026-030-034-039
Maximum compressor test pressure high side (HP)
Maximum compressor test pressure low side (LP)
48.7 bar (g) (706 psig) HP-LP<37bar (537 psi)
33.3 bar (g) (483 psig) HP-LP<5bar (73 psi)
Maximum speed 4.8 bar/s (70 psi/s)
Assembly line procedure

Vacuum evacuation and moisture removal

Refrigerant charging

Dielectric strength and insulation resistance tests

R
Requirements:
• Never use the compressor to evacuate the system.
• Connect a vacuum pump to both the LP and HP sides.
• Evacuate the system to a pressure of 500μm Hg (0.67mbar/0.02 in.Hg) absolute.
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Initial charge:
• For the initial charge, the compressor must not run.
• Charge refrigerant as close as possible to the nominal system charge.
• This initial charging operation must be done in liquid phase between the condenser outlet and the filter drier.
Several tests have been performed on each compressor at the factory between each phase and ground.
• Dielectric strength test is done with a high potential voltage (hi-pot) of 2Un +1000V AC at least, and leakage current must be less than 5mA.
• Insulation resistance is measured with a 500V DC megohm tester and must be higher than 1megohm.
Recommendations:
• Energized heaters improve moisture removal.
• Alternate vacuum phases and break vacuum with Nitrogen to improve moisture removal.
For more detailed information see “Vacuum pump-down and dehydration procedure” TI-026-0302.
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNORDERING INFORMATION INTEGRATION INTO SYSTEM
If needed, a complement of charge can be done before evaporator, in liquid phase while compressor is running by slowly throttling liquid in. Never bypass safety low pressure switch.
For more detailed information see “Recommended refrigerant system charging practice“ FRCC.EN.050.
Recommendations:
• Additional dielectric test is not recommended as it may reduce motor lifetime. Nevertheless, if such as test is necessary, it must be performed at a lower voltage.
• Insulation resistance test can be done.
• The presence of refrigerant around the motor windings will result in lower resistance values to ground and higher leakage current readings. Such readings do not indicate a faulty compressor. To prevent this, the system can be first operated briefly to distribute refrigerant.
Do not use a megohm meter nor apply
R
power to the compressor while it is under vacuum as this may cause internal damage.
35AB232986440751en-001301

Commissioning

Preliminary check

Check electrical power supply:
• Phase order: Reverse rotation is obvious if the compressor don’t build up pressure and sound level is abnormal high. For PSH019 to 039 compressor have phase protection function on OCS. Reverse rotation will be automatically
detected and trip the compressor by opening the M1-M2 relay output. For more details refer to section “Motor protection”.
• Voltage and voltage unbalance within tolerance: For more details refer to section “Motor voltage”.

Initial start-up

GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNORDERING INFORMATION INTEGRATION INTO SYSTEM

System monitoring

• Surface sump heaters must be energized at least 6 hours in advance to remove refrigerant.
• A quicker start-up is possible by “jogging” the compressor to evacuate refrigerant. Start the
The system must be monitored after initial startup for a minimum of 60 minutes to ensure proper operating characteristics such as:
• Correct superheat and subcooling.
• Current draw of individual compressors within acceptable values (max operating current).
• No abnormal vibrations and noise.
• Correct oil level.
compressor for 1 second, then wait for 1 to 2 minutes. After 3 or 4 jogs the compressor can be started. This operation must be repeated for each compressor individually.
If Oil Top-up is needed, it must be done while the compressor is idle. Use the schrader connector or any other accessible connector on the compressor suction line. Always use original Danfoss POE oil 160SZ from new cans. For more detailed information see “Lubricants filling in instructions for Danfoss Commercial Compressors” TI 2-025-0402.
36 AB232986440751en-001301

Dismantal and disposal

Danfoss recommends that compressors and compressor oil should be recycled by a suitable company at its site.
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
37AB232986440751en-001301

Ordering information and packaging

Packaging
Single pack
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Compressor
model
PSH019 565 22.24 470 18.50 718 28. 27 69 152
PSH023 565 22.24 470 18.50 718 28.27 76 168
PSH026 565 22.24 470 18.50 718 28.27 76 16 8
PSH030 565 22.24 470 18. 50 718 28. 27 79 174
PSH034 565 22. 24 470 18. 50 718 28.27 81 179
PSH039 565 22.24 470 18 .50 718 28.27 84 185
Length Width Height Gross weight
mm inch mm inch mm inch kg lbs
Industrial pack
Compressor
model
PSH019
PSH023
PSH026
PSH030
PSH034
PSH039
* Nbr: number of compressor per pack
: Full package version: Bare compressor version
Nb *
6 / 8
6 / 8
6 / 8
6 / 8
6 / 8
6 / 8
Length Width Height Gross weight
mm inch mm inch mm inch kg lbs
1150 45.28 950 37.4 0 680 26.77 386 851 2
1150 45.28 950 37.4 0 750 29.53 424 935 2
1150 45.28 950 37.4 0 750 29.53 424 935 2
1150 45.28 950 37.4 0 750 29.53 440 970 2
1150 45.28 950 37.4 0 750 29.53 452 996 2
1150 45.28 950 37.4 0 750 29.53 470 1036 2
Static
stacking
pallets
38 AB232986440751en-001301
Ordering information and packaging
Ordering information
Single pack
Danfoss PSH019 to 039 scroll compressors can be ordered in either industrial or single packs.
Compressor model Connections
PSH019 PSH023 120 H09 65 120H 0933 120H 098 9 PSH026 120H0 967 120H0935 120H 09 91 PSH030 120H0969 12 0H0937 120H 0993
PSH034 120H0971 120 H0 939 120H 0995
PSH039 120H0973 120H0941 120H 0997 PSH019 PSH023 120H1400 PSH026 120 H1402 PSH030 120H140 4
PSH034 120H140 6
PSH039 12 0H14 08 PSH019 PSH023 120H0953 PSH026 12 0H0955 PSH030 120 H0957
PSH034 120H09 59
PSH039 120H 0961
Full package
Bare compressor *
Simplified bare
compressor **
* Bare compressor doesn’t have liquid injection control and liquid injection valve, only have liquid injection port.
Please use the code numbers from below tables for ordering:
Code number
Motor code 3 Motor code 4 Motor code 9
120 H09 63 12 0H0 931 120H 0987
120 H1398
120 H09 51
** Simplified bare compressor doesn’t have oil sight glass and oil balancing port compare with bare compressor.
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Industrial pack
Compressor Model Connections
PSH019 PSH023 120H0966 120H 09 34 120H0990
PSH026 120H0 968 120H0936 120H09 92 PSH030 120H 0970 120H 093 8 120H0994 PSH034 120H 097 2 120H0940 120 H099 6
PSH039 120 H0974 120H0942 120H 0998
PSH019
PSH023 120 H1401
PSH026 120H1403 PSH030 120H140 5 PSH034 12 0H1407
PSH039 120H1409
PSH019
PSH023 120H 095 4
PSH026 12 0H 095 6 PSH030 120 H0958 PSH034 120H0960
PSH039 120H 096 2
Full package
Bare compressor *
Simplified bare
compressor **
* Bare compressor doesn’t have liquid injection control and liquid injection valve, only have liquid injection port.
Motor code 3 Motor code 4 Motor code 9
120 H09 64 12 0H0932 120H 098 8
** Simplified bare compressor doesn’t have oil sight glass and oil balancing port compare with bare compressor.
Code number
120 H1399
120 H09 52
39AB232986440751en-001301

Accessories

Solder sleeve adapter sets
Typ e Code no. Description Application Packaging Pack size
120Z012 5 Rotolock adaptor set (1"3/4 ~ 1"1/8) , (1"1/4 ~ 7/8") PSH019 Multipack 8
120Z0 405 Rotolock adaptor set (1"3/4 ~ 1"3/8) , (1"1/4 ~ 7/8") PSH023 to 039 Multipack 8
Rotolock adapter
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Typ e Code no. Description Application Packaging Pack size
120Z0367 Adaptor (1"1/4 Rotolock - 7/8" ODF) Models with 7/8” ODF Multipack 10
120Z0364 Adaptor (1"3/4 Rotolock - 1"1/8 ODF) Models with 1"1/8 ODF Multipack 10
120Z0 431 Adaptor (1"3/4 Rotolock - 1"3/8 ODF) Models with 1"3/8 ODF Multipack 10
Gaskets
Typ e Code no. Description Application Packaging Pack size
G09 8156131 Gasket, 1"1/4 Models with 1"1/4 rotolock connection Multipack 10
G09 7956002 Gasket, 1"1/4 Models with 1"1/4 rotolock connection Industry pack 50
G07 8156132 Gasket, 1"3/4 Models with 1"3/4 rotolock connection Multipack 10
G07 7956003 Gasket, 1"3/4 Models with 1"3/4 rotolock connection Industry pack 50
Solder sleeve
Typ e Code no. Description Application Packaging Pack size
P02 8153004 Solder sleeve P02 (1"3/4 Rotolock - 1"1/8 ODF) Models with 1"3/4 rotolock connection Multipack 10
P05 8153012 Rotolock connector P05 (1"1/4 Rotolock - 7/8" ODF) Models with 1"1/4 rotolock connection Multipack 10
P10 81530 03 Solder sleeve P10 (1"3/4 Rotolock - 1"3/8 ODF) Models with 1"3/4 rotolock connection Multipack 10
Rotolock nut
Typ e Code no. Description Application Packaging Pack size
8153123 Rotolock nut,1"1/4 Models with 1-1/4” rotolock connection Multipack 10
7953002 Rotolock nut,1"1/4 Models with 1-1/4” rotolock connection Industry pack 50
8153124 Rotolock nut,1"3/4 Models with 1-3/4” rotolock connection Multipack 10
7953003 Rotolock nut,1"3/4 Models with 1-3/4” rotolock connection Industry pack 50
40 AB232986440751en-001301
Accessories
Rotolock service valve set
Typ e Code no. Description Application Packaging Pack size
7703008 Valve set, V02 (1"3/4 ~ 1"1/8), V05 (1"1/4 ~ 7/8 ") PSH019 Multipack 6
120Z0 403 Valve set, V02 (1"3/4 ~ 1"1/8), V05 (1"1/4 ~ 7/8 ") PSH019 Multipack 8
7703392 Valve set, V10 (1"3/4 ~1"3/8), V05 (1"1/4 ~ 7/8") PSH023 to 039 Multipack 6
* diameter restriction
3-phase soft start equipment
Typ e Code no. Description Application Packaging Pack size
MCI 15 C 7705006 Electronic soft start kit, MCI 15 C PSH 019 Single pack 1
MCI 25 C 7705007 Electronic soft start kit, MCI 25 C PSH023 to 030 Single pack 1
MCI 50 CM 037N0401 Electronic soft start kit, MCI 50 CM PSH034 to 039 Single pack 1
Surface sump heaters
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Typ e Code no. Accessory description Application Packaging Pack size
120Z0388 80W 24V surface sump heater CE & UL
120Z0389 80W 230V surface sump heater CE & UL Multipack 8
120Z0390 80W 400V surface sump heater CE & UL Multipack 8
120Z0391 80W 460V surface sump heater CE & UL Multipack 8
120Z0 402 80W 575V surface sump heater CE & UL Multipack 8
PSH019 to 039
Multipack 8
Control boards
Typ e Code no. Description Application Packaging Pack size
120Z068 9 Control board (OCS) PSH019 to PSH039 Single pack 1
120Z0698 PSH019 to PSH034 Ebox assembly with OCS Old version PSH019 to PSH034 field replacement Single pack 1
120Z0699 PSH039 Ebox assembly with OCS Old version PSH039 field replacement Single pack 1
Sensors & cables
Typ e Code no. Description Application Packaging Packsize
120Z0534 Discharge temperature sensor PT1000 PSH019 to PSH039 Single pack 1
41AB232986440751en-001301
Accessories
Tandem kits
Typ e Code no. Description Application Packaging Pack size
7777054 Suction washer,rigid spacer, sleeve for oil connection Even tandem Single pack 1
Mounting kits
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNINTEGRATION INTO SYSTEMORDERING INFORMATION
Typ e Code no. Description Application Packaging Pack Size
120Z0 066
Mounting kit for scroll compressors. Grommets, sleeves, bolts, washers
PSH019 to 039 Single pack 1
Lubricant
Typ e Code no. Description Application Packaging Pack Size
160SZ 7754023 POE lubricant, 1 litre can All models Multi pack 12
160SZ 12 0Z0571 POE lubricant, 2.5 litre can All models Multi pack 4
Miscellaneous
Typ e Code no. Description Application Packaging Pack Size
8156 019 Sight glass with gaskets (black & white) All models Multi pack 4
8156129 Gasket for oil sight glass, 1"1/8 (white teflon) All models Multi pack 10
7956005 Gasket for oil sight glass, 1"1/8 (white teflon) All models Multi pack 50
8154001 Danfoss Commercial Compressors blue spray paint All models Single pack 1
42 AB232986440751en-001301
Danfoss Commercial Compressors
Danfoss Inverter Scrolls
is a worldwide manufacturer of compressors and condensing units for refrigeration and HVAC applications. With a wide range of high quality and innovative products we help your company to find the best possible energy efficient solution that respects the environment and reduces total life cycle costs.
We have 40 years of experience within the development of hermetic compressors which has brought us amongst the global leaders in our business, and positioned us as distinct variable speed technology specialists. Today we operate from engineering and manufacturing facilities spanning across three continents.
Danfoss Turbocor Compressors
Danfoss Scrolls
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Compressors
Our products can be found in a variety of applications such as rooftops, chillers, residential air conditioners, heatpumps, coldrooms, supermarkets, milk tank cooling and industrial cooling processes.
http://cc.danfoss.com
Danfoss Commercial Compressors, BP 331, 01603 Trévoux Cedex, France | +334 74 00 28 29
AB232986440751en-001301 © Danfoss | DCS (CC) | 2020.04
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