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 Manage operating envelope..........................

22

PRODUCT INFORMATION................................	5
Features.............................................................	5
Overview..................................................................................	5
Liquid injection......................................................................	6
Compressor model designation.......................	7
Nomenclature.........................................................................	7
Technical specifications....................................	8
50-60Hz data...........................................................................	8
Dimensions........................................................	9
Single compressors..............................................................	9
Connection Details.............................................................	10
Tandem assemblies ...........................................................	11
Electrical data, connections and wiring .......	12
Motor voltage.......................................................................	12
Wiring Connections............................................................	12
IP Rating.................................................................................	13
Terminal box temperature...............................................	13
Three phase electrical characteristics..........................	14
LRA (Locked Rotor Amp)..................................................	14
MCC (Maximum Continuous Current).........................	14
MOC (Maximum Operating Current)...........................	14
Motor protection.................................................................	15
Approvals and certificates..............................	16
Approvals and certificates...............................................	16
Pressure equipment directive 2014/68/EU.............	16
Low voltage directive 2014/35/EU................................	16
Machines directive 2006/42/EC.....................................	16
Internal free volume...........................................................	16
SYSTEM DESIGN..............................................	17
Design piping..................................................	17
General requirements........................................................	17
Tandem Configuration......................................................	18
Design compressor mounting........................	19
General requirements........................................................	19
Single requirements...........................................................	19
Tandem Kits...........................................................................	19
Manage oil in the circuit.................................	20
Requirement.........................................................................	20
System evaluation...............................................................	20
Test, criteria and solutions...............................................	20
Manage sound and vibration.........................	21
Compressor sound radiation..........................................	21
Mechanical vibrations.......................................................	21
Gas pulsation........................................................................	21

Requirement.........................................................................	22
High and low pressure protection................................	23
Discharge gas temperature (DGT) protection..........	23
System evaluation...............................................................	24
Test, criteria and solutions...............................................	24
Manage superheat..........................................	25
Requirement.........................................................................	25
System evaluation...............................................................	25
Test, criteria and solutions...............................................	25
Manage off cycle migration............................	27
Requirement.........................................................................	27
System evaluation...............................................................	27
Provide power supply and electrical
protection........................................................	28
Wiring information.............................................................	28
Soft starts...............................................................................	29
Control logic....................................................	30
Safety control logic requirements.................................	30
Cycle rate limit requirements..........................................	30
Oil management logic recommendations.................	30
Defrost logic recommendations / Reversible sys-
tems.........................................................................................	30
Pump-down logic recommendations.........................	31
Reduce moisture in the system......................	32
Requirements.......................................................................	32
Solutions................................................................................	32
INTEGRATION INTO SYSTEM.........................	33
Assembly line procedure................................	33
Compressor storage...........................................................	33
Compressor holding charge............................................	33
Handling ................................................................................	33
Piping assembly...................................................................	34
System pressure test and leak detection....................	34
Vacuum evacuation and moisture removal .............	35
Refrigerant charging..........................................................	35
Dielectric strength and insulation resistance tests.35
Commissioning................................................	36
Preliminary check................................................................	36
Initial start-up.......................................................................	36
System monitoring.............................................................	36
ORDERING INFORMATION.............................	39
Dismantal and disposal.....................................................	37
Ordering information and packaging.........................	38
Accessories............................................................................	40

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General Information

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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	from an improved design to achieve the highest
	for heat pump application. Moreover, it benefits	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

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	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.

Filter drier

Condenser

Di

LIV

trol

Evaporator

EXV

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Compressor model designation

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

Nomenclature

technical reference as shown on the compressor nameplate. Code numbers for ordering are listed in section “Ordering information”.

P S H 039 A 4 C L D

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

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

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Technical specifications

50-60 Hz data

		Nominal Heating		Power		Control board &			Displacement				Net weight
					COP	injection valve power	Swept volume				Oil charge
	Model	capacity		Input										
						consumption
		W	Btu/h	kW	W/W	W	cm3/rev cu.in/rev		m3/h	cu.ft/h	dm3	oz	kg	lbs
	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
<![if ! IE]> <![endif]>50Hz	PSH026	26000	88795	8.65	3.00	3.9	116.90	7.13	20.30	717	3.3	112	64.5	142
	PSH030	30000	102455	9.60	3.13	3.9	133.00	8.12	23.12	816	3.3	112	67.5	149
	PSH034	34200	116799	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
<![if ! IE]> <![endif]>60Hz	PSH026	31400	107237	10.19	3.08	3.9	116.90	7.13	24.60	869	3.3	112	64.5	142
	PSH030	35700	121922	11.35	3.15	3.9	133.00	8.12	27.90	985	3.3	112	67.5	149
	PSH034	40500	138315	12.72	3.18	3.9	151.17	9.22	31.90	1127	3.3	112	69.5	153
	PSH039	46500	158806	14.49	3.21	3.9	170.30	10.39	35.80	1264	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 60Hz Net weight with oil charge

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Dimensions

Single compressors

	ØD
H	H2
	H1

L3

190.5 (x2)

(7.5 inch) (x2)

30°±0.5°

4 x hole Ø19.05 (0.75 inch)

190.5 (7.5 inch)	L1
(x2)

L2

30°±1°

		D		H		H1		H2		L1		L2		L3	Outline drawing
Compressor model
															number
	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	11.77	524	20.63	206	8.11	230	9.06	230	9.06	8560054

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Dimensions

Connection Details

Suction connection

Discharge connection

Liquid injection connection

Oil sight glass

Oil equalization connection

Low pressure gauge port (Schrader)

PSH019	PSH023-026-030-034-039
Brazed 1"1/8	Brazed 1"3/8
Brazed 7/8"	Brazed 7/8"

5/16" ODF

Threaded (1"1/8 – 18 UNEF)

Rotolock 1"3/4

Male ¼" Flare incorporating a Schrader valve

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Dimensions

Tandem assemblies

L1

H	H1

L

D

							L								D				H										L1					H1	Outline drawing
Tandem model	Composition
																																			number
				mm				inch				mm			inch			mm			inch				mm					inch		mm		inch
PSH038	2×PSH019			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	Danfoss PSH019 to 039 compressors are available in three different motor voltages as listed below;
	Motor voltage code		Code 3	Code 4	Code 9
	50Hz	Nominal voltage	-	380-400V - 3ph	-
		Voltage range	-	342-440V	-
	60Hz	Nominal voltage	200-230V - 3ph	460V - 3ph	380V3ph
		Voltage range	180-253V	414-506V	342-418V
		The maximum allowable voltage imbalance is		overheating and possible motor damage. Voltage
		2%. Voltage imbalance causes high amperage		imbalance is given by the formula:
		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	V1-3 = Voltage between phases 1 & 3
V1-2 = Voltage between phases 1 & 2	V2-3 = Voltage between phases 2 & 3

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

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.

			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

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.

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	status indicator. When there is no alarm, the LED2
	as picture showed above.	presents GREEN color. When there is a alarm, the
		LED2 presents YELLOW/RED color blinking code.
	LED1 is the control board power supply status	More detail blinking code information refer to
	indicator. When the power supply is ON, the LED1	related section.
	presents GREEN color. LED2 is the protection
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

R	The temperature inside the terminal box

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).

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Electrical data, connections and wiring

Three phase electrical characteristics

Compressor models	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
Motor code 3	304	64	56	0.24
PSH030
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
Motor code 4	147	32	28	0.92
PSH030
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
Motor code 9	168	37	33	0.62
PSH030
PSH034	177	41	37	0.57
PSH039	239	51	44	0.57

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

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