PSH Series Scroll Compressors
“
Specifications:
- Model Number: PSH105A4EMA
- Serial Number: PG2500000002
- Refrigerant: R410A/R454B
- Supply Voltage: 380-415V3~50 Hz, 460V3~60
Hz - Starting Current & Maximum Operating
Current: LR 385 A MAX OPER. 91 A - Housing Service Pressure: LP Side 31.1 bar, HP
Side 48.7 bar - Lubricant: P.O.E 160SZ
Product Usage Instructions:
1. Installation and Servicing:
Installation and servicing should only be performed by qualified
personnel following sound refrigeration engineering practices
related to installation, commissioning, maintenance, and
service.
2. Operating Maps:
The compressor must be used within the specified operating maps
for different refrigerants and frequencies. Ensure the compressor
is operated within the recommended parameters for optimal
performance.
3. Usage Guidelines:
The compressor must only be used for its designed purpose(s) and
within its scope of applicable local safety regulations. It must be
handled with caution, especially during installation and
maintenance procedures.
4. Safety Precautions:
Always refer to the EN378 guidelines or other relevant safety
standards. Ensure the compressor is not connected to a nitrogen gas
pressure exceeding the specified range of 0.3 to 0.7 bar. Handle
the compressor in a vertical position with care.
FAQ (Frequently Asked Questions):
Q: What should I do if the compressor is not operating within
the specified parameters?
A: If the compressor is not operating as expected, first check
if it is within the recommended operating maps for the refrigerant
and frequency being used. If issues persist, contact qualified
personnel for servicing.
Q: Can I use a different refrigerant than the ones
specified?
A: It is recommended to use only the specified refrigerants
(R410A/R454B) for optimal performance and safety. The compressor is
designed to work with these specific refrigerants.
“`
Instructions
Danfoss scroll compressors PSH Series
1 – Introduction
This instruction pertains to the Danfoss PSH scroll compressor. It
Danfoss CD-000010
Danfoss CD-000005
provides necessary information regarding safety and proper usage
of this product.
2 – Name plate
Installation and servicing of the compressor by qualified personnel only. Follow these instructions and sound refrigeration engineering practice relating to installation, commissioning, maintenance and service.
1 Model no : PSH105A4EMA
MADE IN CHINA
T
2 Serial no : PG2500000002
380-415V3~50 Hz
460V3~60 Hz
UL electrical ratings
4
LR 385 A MAX OPER. 91 A
Thermally protected system
P.E.D.
LP Side HP Side
Marking
PS
31.1 bar 48.7 bar
TS Max 52 °C
150 °C
5
TS Min -35 °C -35 °C
Volume 28.2 L 3.8 L
Lubricant: P.O.E 160SZ
6
876543210
2023
0062
3 Refrigerant: R410A/ R454B PROTECTED BY DOMESTIC AND FOREIGN PATENTS
1: Model number 2: Serial number 3: Refrigerant 4: Supply voltage, Starting current & Maximum operating current 5: Housing service pressure 6: Factory charged lubricant
3 – Operating maps
PSH019-039 R410A SSH5K, 50Hz
70 65 60 55 50 45 40 35 30 25 20 15 10
5 0
-45
-40 -35 -30 No injecon
-25 -20 -15 -10 -5 0 5
LI
Evaporang temperature (°C)
10 15 20
VI
WI
25 30
Danfoss OE-000198
Condensing temperature (°C)
PSH019-039 R454B SSH5K, 50Hz
70 65 60 55 50 45 40 35 30 25 20 15 10
5 0
-45
-40 -35 -30 -25 No injecon
-20 -15 -10 -5 0 5 LI Evaporang temperature (°C)
10 15 20 VI
25 30
WI
Danfoss OE-000200
PSH019-039 R410A SSH5K, 60Hz
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
-45 -40 -35 -30 -25 -20 -15 -10 -5 0 5
No injecon
LI Evaporang temperature (°C)
10 15 VI
20 WI
25
30
Danfoss OE-000199
Condensing temperature (°C)
PSH019-039 R454B SSH5K, 60Hz
70 65 60 55 50 45 40 35 30 25 20 15 10
5 0
-45
-40 -35 -30 No injecon
-25 -20 -15 -10 -5 0 5 LI Evaporang temperature (°C)
10 15 20 25 30
VI
WI
Danfoss OE-000201
Condensing temperature (°C)
Condensing temperature (°C)
The compressor must only be used for its Under all circumstances, The compressor is delivered under The compressor must be
designed purpose(s) and within its scope of the EN378 (or other nitrogen gas pressure (between 0.3 and handled with caution in the
application (refer to «operating limits»).
applicable local safety 0.7 bar) and hence cannot be connected vertical position (maximum
Consult Application guidelines and datasheet regulation) requirements as is; refer to the «assembly» section for offset from the vertical : 15°)
available from cc.danfoss.com
must be fulfilled.
further details.
© Danfoss | Climate Solutions | 2025.07
8510319P01AG – AN467239857365en-000301 | 1
Condensing temperature (°F)
Instructions
Condensing temperature (°C)
PSH052-105 R410A SH5K 50Hz
-49 70 65 60 55 50 45 40 35 30 25 20 15 10
5 -45
-40 -31 -22 -13
-40 -35 -30 -25 PSH large No injection 50Hz
Evaporating temperature (°F) -4 5 14 23 32
-20 -15 -10 -5 0 Evaporating temperature (°C)
PSH large LI injection 50Hz
41 50 59
5 10 15 PSH large VI 50Hz
68 77 86 158 149 140 131 122 113 104 95 86 77 68 59 50 41
20 25 30
PSH large WI 50Hz
Danfoss
OE-000150
PSH052-105 R410A SH5K 60Hz
-49 70 65 60 55 50 45 40 35 30 25 20 15 10
5 -45
-40 -31 -22 -13
-40 -35 -30 -25 PSH large No injection 60Hz
Evaporating temperature (°F) -4 5 14 23 32
-20 -15 -10 -5 0 Evaporating temperature (°C)
PSH large LI injection 60Hz
41 50 59
5 10 15 PSH large VI 60Hz
68 77 86 158 149 140 131 122 113 104 95 86 77 68 59 50 41
20 25 30
PSH large WI 60Hz Danfoss OE-000149
Condensing temperature (°C)
Condensing temperature (°F) Condensing temperature (°C)
Condensing temperature (°F) Condensing temperature (°C)
PSH052-105 R454B SH5K 50Hz
-49 70 65 60 55 50 45 40 35 30 25 20 15 10
5 -45
-40 -31 -22 -13
-40 -35 -30 -25 PSH large No injection 50Hz
Evaporating temperature (°F) -4 5 14 23 32
-20 -15 -10 -5 0 Evaporating temperature (°C)
PSH large LI injection 50Hz
41 50 59
5 10 15 PSH large VI 50Hz
68 77 86 158 149 140 131 122 113 104 95 86 77 68 59 50 41
20 25 30
PSH large WI 50Hz Danfoss OE-000148
PSH052-105 R454B SH5K 60Hz
-49 70 65 60 55 50 45 40 35 30 25 20 15 10
5 -45
Evaporating temperature (°F) -40 -31 -22 -13 -4 5 14 23 32
-40 -35 -30 -25 PSH large No injection 60Hz
-20 -15 -10 -5 0 Evaporating temperature (°C)
PSH large LI injection 60Hz
41 50 59
5 10 15 PSH large VI 60Hz
68 77 86 158 149 140 131 122 113 104 95 86 77 68 59 50 41
20 25 30
PSH large WI 60Hz Danfoss OE-000147
Condensing temperature (°F)
4 – Electrical connections details
PSH019-023-026-030-034-039
These Danfoss scroll compressors are protected against overheating and overloading by an internal safety motor protector. However, an external manual reset overload protector is recommended for protecting the circuit against over-current.
SS
CC
PSH019-023-026-030-034039 (except PSH030/034 code 3 PSH039 code3/7/9)
PSH030/034 code 3 PSH039 code3/7/9
LPS
UC
T1
T2
T3
PSH052-065-079
These Danfoss scroll compressor motors are protected by an external module protecting against phase loss/reversal, overheating and high current draw.
PSH052-065-079 (except PSH079 code 3)
PSH079 code 3
L1 L2 L3 L N S1 S2 M1M2
2 | AN467239857365en-000301 – 8510319P01AG
M
KM
SSH
SS
CC
CB
LPS
UNIT CONTROLLER
MPM
S KM
DGT
SSH
© Danfoss | Climate Solutions | 2025.07
Instructions
PSH105 (except code 3) These Danfoss scroll compressor motors are protected by an external module protecting against phase loss/reversal, overheating and high current draw.
SEPARATE SUPPLY
CONTROL CIRCUIT
CB
LPS
UNIT CONTROLLER
MPM
S KM
DGT
SSH
PSH105 code 3 These Danfoss scroll compressor motors are protected by two external modules protecting against phase loss/reversal, overheating and high current draw.
SS
CC
LPS
UNIT CONTROLLER
KM
L1 L3 L2 CB KM
MPM
L1 3
L2 1
2 L3
L1 9
L2 7
8 L3
MPM
S
SSH
Legend:
Fuses …………………………………………………………………………….. F1 Compressor contactor……………………………………………….. KM High pressure safety switch………………………………………… HP Discharge gas thermistor (embedded in compressors)….. …………………………………………………………………………………….DGT
Surface Sump Heater………………………………………………… SSH Compressor motor ………………………………………………………..M Motor Protection Module ………………………………………..MPM Thermistor chain……………………………………………………………. S
Safety pressure switch………………………………………………..LPS Thermal magnetic motor circuit breaker ………………….. CB
5 Handling and storage
· Handle the compressor with care. Use the dedicated handles in the packaging. Use the compressor lifting lug and use appropriate and safe lifting equipment. ·Store and transport the compressor in an upright position. ·Store the compressor between Ts min and Ts max values for LP side indicated on compressor nameplate. ·Don’t expose the compressor and the packaging to rain or corrosive atmosphere.
6 Safety measures before assembly
Never use the compressor in a flammable atmosphere. · Check before assembly that the compressor
does not show any obvious signs of deterioration that could have occurred during inappropriate transportation, handling or storage. · The compressor ambient temperature may not exceed Ts max value for LP side indicated on compressor nameplate during off-cycle. ·Mount the compressor on a horizontal flat sur-
© Danfoss | Climate Solutions | 2025.07
face with less than 3° slope. ·Verify that the power supply corresponds to the compressor motor characteristics (see nameplate). ·When installing PSH compressors, use equipment specifically reserved for HFC refrigerants which was never used for CFC or HCFC refrigerants. ·Use clean and dehydrated refrigeration-grade copper tubes and silver alloy brazing material. · Use clean and dehydrated system components. ·The piping connected to the compressor must be flexible in 3 dimensions to dampen vibrations.
7 Assembly
· The compressor must be mounted on rails or chassis according to Danfoss recommendations described in related product guidelines (type of spacer, tightening torques). · Slowly release the nitrogen holding charge through the schrader port. ·Remove the gaskets when brazing rotolock connectors. · Always use new gaskets for assembly.
·Connect the compressor to the system as soon as possible to avoid oil contamination from ambient moisture. ·Avoid material entering into the system while cutting tubes. Never drill holes where burrs cannot be removed. ·Braze with great care using state-of-the-art technique and vent piping with nitrogen gas flow. ·Connect the required safety and control devices. When the schrader port is used for this, remove the internal valve. ·Do not exceed the maximum tightening torque for rotolock connections:
Rotolock connections 1″ rotolock 1 1/4 ” rotolock 1 3/4″ rotolock 2 1/4″ rotolock
Tightening torque 80 Nm 90 Nm 110 Nm 145 Nm.
8 Leak detection
Never pressurize the circuit with oxygen or dry air. This could cause fire or explosion. ·Do not use dye for leak detection.
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Instructions
·Perform a leak detection test on the complete system. · The test pressure must not exceed 1.1 x PS value for LP side and PS value for HP side indicated on compressor nameplate. · When a leak is discovered, repair the leak and repeat the leak detection.
9 Vacuum dehydration
· Never use the compressor to evacuate the system. ·Connect a vacuum pump to both the LP & HP sides. · Pull down the system under a vacuum of 500 µm Hg (0.67 mbar) absolute. ·Do not use a megohmmeter nor apply power to the compressor while it is under vacuum as this may cause internal damage.
10 Electrical connections
· Switch off and isolate the main power supply. See overleaf for wiring details. ·All electrical components must be selected as per local standards and compressor requirements. ·Refer to section 4 for electrical connections details. ·The Danfoss scroll compressors only works correctly in one rotation direction. Line phases L1, L2, L3 must absolutely be connected to compressor terminals T1, T2, T3 to avoid reverse rotation. ·According to compressor model, electrical power is connected to the compressor terminals either by 4.8mm (10-32) screws or by M5 studs and nuts . In both cases use appropriate ring terminals, fasten with 3Nm torque. ·The compressor must be connected to earth. For M5 nut, the maximum torque is 4Nm.
11 Filling the system
· Keep the compressor switched off. ·Fill the refrigerant in liquid phase into the condenser or liquid receiver. The charge must be as close as possible to the nominal system charge to avoid low pressure operation and excessive superheat. Never let the pressure on LP side exceed the pressure on HP side with more than 5 bar. Such pressure difference could cause internal compressor damage. ·Keep the refrigerant charge below the indicated charge limits if possible. Above this limit, protect the compressor against liquid flood-back with a pump-down cycle or suction line accumulator. ·Never leave the filling cylinder connected to the circuit.
Compressor models
PSH019 PSH023 PSH026 PSH030 PSH034 PSH039 PSH052 PSH065 PSH079 PSH105
Refrigerant charge limit (kg) 5 6 7 8 9 10 13.5 13.5 17 17
12 Verification before commissioning
Use safety devices such as safety pressure switch and mechanical relief valve in compliance with both generally and locally applicable regula-
tions and safety standards. Ensure that they are operational and properly set.
Check that the settings of high-pressure switches and relief valves don’t exceed the maximum service pressure of any system component.
· A low-pressure switch is recommended to avoid vacuum operation. Minimum setting for PSH: 0.6 bar g(R410A)/0.4 bar g(R454B). ·Verify that all electrical connections are properly fastened and in compliance with local regulations. · When a crankcase heater is required, it must be energized at least 12 hours before initial startup and start-up after prolonged shut- down for belt type crankcase heaters (6 hours for surface sump heaters). · For PSH052-105 the use of a 75W belt heater is mandatory, if the ambient temperature is between -5°C and -23°C. For ambient temperature between -23°C and -28°C a 130W belt heater must be used. For ambient temperature below -28°C two pieces 130W belt heater must be used. ·For PSH019 to 039, the use of a 80W surface sump heater is mandatory, if the ambient temperature is between -5°C and -23°C. For ambient temperature between -23°C and -33°C an additional 48W surface sump heater must be used.
13 Start-up
Never operate the compressor without the electrical box cover fitted. ·Never start the compressor when no refrigerant
is charged. ·All service valves must be in the open position. · Balance the HP/LP pressure. ·Energize the compressor. It must start promptly. If the compressor does not start, check wiring conformity and voltage on terminals. ·Eventual reverse rotation can be detected by following phenomena; the compressor doesn’t build up pressure, it has abnormally high sound level and abnormally low power consumption. In such case, shut down the compressor immediately and connect the phases to their proper terminals. Danfoss PSH scroll compressors are protected against reverse rotation by the external electronic protection module. They will shut off automatically. Prolonged reverse rotation will damage these compressors. ·If the internal pressure relief valve is opened the compressor sump will be warm and the compressor will trip out on the motor protector. ·The suction temperature cannot lower than35°C, and minimum ambient temperature during start and operation cannot lower than -33°C.
14 Check with running compressor
·Check current draw and voltage. ·Check suction superheat to reduce risk of slugging. ·Observe the oil level in the sight glass for about 60 minutes to ensure proper oil return to the compressor. ·Respect the operating limits. ·Check all tubes for abnormal vibration. Movements in excess of 1.5 mm require corrective measures such as tube brackets. ·When needed, additional refrigerant in liquid phase may be added in the low-pressure side as
far as possible from the compressor. The compressor must be operating during this process. ·Do not overcharge the system. ·Never release refrigerant to atmosphere. ·Before leaving the installation site, carry out a general installation inspection regarding cleanliness, noise and leak detection. ·Record type and amount of refrigerant charge as well as operating conditions as a reference for future inspections.
15 Maintenance
Internal pressure and surface temperature are dangerous and may cause permanent injury. Maintenance operators and installers require appropriate skills and tools. Tubing temperature may exceed 100°C and can cause severe burns.
Ensure that periodic service inspections to ensure system reliability and as required by local regulations are performed.
To prevent system related compressor problems, following periodic maintenance is recommended: ·Verify that safety devices are operational and
properly set. · Ensure that the system is leak tight. ·Check the compressor current draw. ·Confirm that the system is operating in a way consistent with previous maintenance records and ambient conditions. ·Check that all electrical connections are still adequately fastened. ·Keep the compressor clean and verify the absence of rust and oxidation on the compressor shell, tubes and electrical connections.
16 – Warranty
Always transmit the model number and serial number with any claim filed regarding this product. The product warranty may be void in following cases: · Absence of nameplate. ·External modifications; in particular, drilling,
welding, broken feet and shock marks. ·Compressor opened or returned unsealed. ·Rust, water or leak detection dye inside the compressor. ·Use of a refrigerant or lubricant not approved by Danfoss. ·Any deviation from recommended instructions pertaining to installation, application or maintenance. · Use in mobile applications. ·Use in explosive atmospheric environment. ·No model number or serial number transmitted with the warranty claim. The compressor is not designed to withstand natural disasters such as earthquakes, cyclones, floods…. or extreme events such as fires, terrorist attacks, military bombardments, or explosions of any kind. Danfoss Commercial Compressor is not liable for any malfunction of its product resulting from such events
17 Disposal
Danfoss recommends that compressors and compressor oil should be recycled by a suitable company at its site.
4 | AN467239857365en-000301 – 8510319P01AG
© Danfoss | Climate Solutions | 2025.07
Instructions
© Danfoss | Climate Solutions | 2025.07
8510319P01AG – AN467239857365en-000301 | 5
6 | AN467239857365en-000301 – 8510319P01AG
© Danfoss | Climate Solutions | 2025.07
Documents / Resources
 |
Danfoss PSH Series Scroll Compressors [pdf] Instructions PSH105A4EMA, PSH019-039 R410A, PSH019-039 R454B, PSH Series Scroll Compressors, PSH Series, Scroll Compressors, Compressors |