Mitsubishi PUH-P8MYA, PUH-P10MYA Service Manual

				2003
AIR-COOLED SPLIT-TYPE
PACKAGED AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

<Outdoor unit>

Models

HEAT PUMP PUH-P8MYA, PUH-P10MYA

(Single and Twin/Triple/Four)

For use with the R407C

Contents

			Page
1	PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT		...................................... 1
	[1] Storage of Piping Material ...................................................................................................		2
	[2]	Piping Machining .................................................................................................................	3
	[3] Necessary Apparatus and Materials and Notes on Their Handling .....................................		4
	[4]	Brazing .................................................................................................................................	5
	[5]	Airtightness Test ..................................................................................................................	6
	[6]	Vacuuming ...........................................................................................................................	6
	[7]	Charging of Refrigerant .......................................................................................................	7
2	SPECIFICATIONS ......................................................................................................................		8
3	EXTERNAL DIMENSIONS .......................................................................................................		10
4	ELECTRICAL WIRING DIAGRAM ............................................................................................		11
	[1]	Outdoor Unit .......................................................................................................................	11
	[2] Skelton of Indoor/Outdoor Connection ..............................................................................		12
5	Technical Data of PUH-8/10YD to Meet LVD .........................................................................		13
	[1]	Standard Operation Data ...................................................................................................	13
	[2]	Cooling Capacity Curves ...................................................................................................	14
	[3]	Heating Capacity Curves ...................................................................................................	14
	[4] Capacity Reduction Ratio due to Changes in Piping Length .............................................		15
	[5] Center of Gravity (Outdoor unit) ........................................................................................		16
	[6]	NC Curve (Outdoor unit) ...................................................................................................	17
6	SERVICE DATA ........................................................................................................................		18
	[1]	Appearance of Equipment .................................................................................................	18
	[2]	Refrigerant Circuit ..............................................................................................................	20
	[3] Limitation of Refrigerant Piping Length ..............................................................................		20
	[4]	Refrigerant Piping ..............................................................................................................	21
	[5]	Refrigerant Charge ............................................................................................................	21
	[6]	Operation Rage .................................................................................................................	21
7	CONTROL ................................................................................................................................		22
	[1]	Composition of Control ......................................................................................................	22
	[2]	Control specifications .........................................................................................................	23
	[3] Function of switches and connectors (outdoor unit) ..........................................................		27
	[4] Simple parts check method ...............................................................................................		35
	[5]	Reference Data ..................................................................................................................	36
	[6] Troubleshooting of each part .............................................................................................		37
	[7]	Emergency operation .........................................................................................................	40
	[8]	Self-diagnosis and troubleshooting ....................................................................................	42
8	Test run ....................................................................................................................................		51

1 PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT

Caution

Do not use the existing refrigerant piping.

•The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.

Use refrigerant piping made of C1220 (CU-DHP) phosphorus deoxidized copper as specified in the *JIS H3300 “Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.

•Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.

*JIS: Japanese Industrial Standard

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)

•If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

Use ester oil, ether oil or alkylbenzene (small amount)

as the refrigerator oil to coat flares and flange con-

nections.

•The refrigerator oil will degrade if it is mixed with a large amount of mineral oil.

Use liquid refrigerant to seal the system.

•If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.

Do not use a refrigerant other than R407C.

•If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

Use a vacuum pump with a reverse flow check valve.

•The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

Do not use the following tools that have been used with conventional refrigerants.

(Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)

•If the conventional refrigerant and refrigerator oil are mixed in the R407C, the refrigerant may deteriorated.

•If water is mixed in the R407C, the refrigerator oil may deteriorate.

•Since R407C does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it.

Do not use a charging cylinder.

•Using a charging cylinder may cause the refrigerant to deteriorate.

Be especially careful when managing the tools.

•If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

If the refrigerant leaks, recover the refrigerant in the refrigerant cycle, then recharge the cycle with the specified amount of the liquid refrigerant indicated on the air conditioner.

•Since R407C is a nonazeotropic refrigerant, if additionally charged when the refrigerant leaked, the composition of the refrigerant in the refrigerant cycle will change and result in a drop in performance or abnormal stopping.

–1–

[1] Storage of Piping Material

(1) Storage location

Store the pipes to be used indoors. (Warehouse at site or owner’s warehouse)

Storing them outdoors may cause dirt, waste, or water to infiltrate.

(2) Pipe sealing before storage

Both ends of the pipes should be sealed until immediately before brazing.

Wrap elbows and T’s in plastic bags for storage.

*The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil (such as Suniso). Water infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure. Piping materials must be stored with more care than with the conventional refrigerant pipes.

–2–

[2] Piping Machining

Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.

Use only the necessary minimum quantity of oil !

Reason:

1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside.

Notes:

•Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure.

•Do not use oils other than ester oil, ether oil or alkylbenzene.

–3–

[3] Necessary Apparatus and Materials and Notes on Their Handling

The following tools should be marked as dedicated tools for R407C.

<<Comparison of apparatus and materials used for R407C and for R22>>

Apparatus Used	Use		R22	R407C
Gauge manifold	Evacuating, refrigerant filling		Current product
Charging hose	Operation check		Current product
Charging cylinder	Refrigerant charging		Current product	Do not use
Gas leakage detector	Gas leakage check		Current product	Shared with R134a
Refrigerant collector	Refrigerant collection		R22	For R407C use only
Refrigerant cylinder	Refrigerant filling		R22	Identification of dedi-
				cated use for R407C:
				Record refrigerant name
				and put brown belt on
				upper part of cylinder.
Vacuum pump	Vacuum drying		Current product	Can be used by attach-
				ing an adapter with a
				check valve.
Vacuum pump with a check valve			Current product
Flare tool	Flaring of pipes		Current product
Bender	Bending of pipes		Current product
Application oil	Applied to flared parts		Current product	Ester oil or Ether oil or
				Alkybenzene (Small
				amount)
Torque wrench	Tightening of flare nuts		Current product
Pipe cutter	Cutting of pipes		Current product
Welder and nitrogen cylinder	Welding of pipes		Current product
Refrigerant charging meter	Refrigerant charging		Current product
Vacuum gauge	Checking the vacuum degree		Current product
Symbols: To be used for R407C only.		Can also be used for conventional refrigerants.

Tools for R407C must be handled with more care than those for conventional refrigerants. They must not come into contact with any water or dirt.

–4–

[4] Brazing

No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit.

Example: Inner state of brazed section

When non-oxide brazing was not used

When non-oxide brazing was used

Items to be strictly observed:

1.Do not conduct refrigerant piping work outdoors on a rainy day.

2.Apply non-oxide brazing.

3.Use a brazing material (Bcup-3) which requires no flux when brazing between copper pipes or between a copper pipe and copper coupling.

4.If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends of them.

Reasons:

1.The new refrigerant oil is 10 times more hygroscopic than the conventional oil. The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil.

2.A flux generally contains chlorine. A residual flux in the refrigerant circuit may generate sludge.

Note:

•Commercially available antioxidants may have adverse effects on the equipment due to its residue, etc. When applying non-oxide brazing, use nitrogen.

–5–

[5] Airtightness Test

No changes from the conventional method. Note that a refrigerant leakage detector for R22 cannot detect R407C leakage.

Halide torch

R22 leakage detector

Items to be strictly observed:

1.Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment’s airtightness, taking temperature variations into account.

2.When investigating leakage locations using a refrigerant, be sure to use R407C.

3.Ensure that R407C is in a liquid state when charging.

Reasons:

1.Use of oxygen as the pressurized gas may cause an explosion.

2.Charging with R407C gas will lead the composition of the remaining refrigerant in the cylinder to change and this

refrigerant can then not be used.

Note:

•A leakage detector for R407C is sold commercially and it should be purchased.

[6]Vacuuming

1.Vacuum pump with check valve

A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant circuit when the vacuum pump power is turned off (power failure).

It is also possible to attach a check valve to the actual vacuum pump afterwards.

2.Standard degree of vacuum for the vacuum pump

Use a pump which reaches 0.5 Torr (500 MICRON) or below after 5 minutes of operation.

In addition, be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil. If the vacuum pump is not properly maintained, the degree of vacuum may be too low.

3.Required accuracy of the vacuum gauge

Use a vacuum gauge that can measure up to 5 Torr. Do not use a general gauge manifold since it cannot measure a vacuum of 5 Torr.

4.Evacuating time

•Evacuate the equipment for 1 hour after –755 mmHg (5 Torr) has been reached.

•After envacuating, leave the equipment for 1 hour and make sure the that vacuum is not lost.

5.Operating procedure when the vacuum pump is stopped

In order to prevent a backflow of the vacuum pump oil, open the relief valve on the vacuum pump side or loosen the charge hose to drawn in air before stopping operation.

The same operating procedure should be used when using a vacuum pump with a check valve.

–6–

[7] Charging of Refrigerant

R407C must be in a liquid state when charging, because it is a non-azeotropic refrigerant.

For a cylinder with a syphon attached For a cylinder without a syphon attached

	Cylin-
Cylin-	der
der

	Gray
Valve	Pink	Valve

Liquid

Liquid

Reasons:

1.R407C is a mixture of 3 refrigerants, each with a different evaporation temperature. Therefore, if the equipment is charged with R407C gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder.

Note:

•In the case of a cylinder with a syphon, liquid R407C is charged without turning the cylinder up side down. Check the type of cylinder before charging.

–7–

2 SPECIFICATIONS

Specifications of air-source heat pump type packaged air conditioner (Outdoor unit)

Model name					PUH-P8MYA			Quantity
								Cooling		Heating
Capacity						kcal/h	18,000			20,400
						kW	20.9			23.7
Power source								3N~ 380/400/415 V 50 Hz
Power input						kW	7.27			7.17
Current						A	13.0			12.8
			Type x Quantity						Propeller fan × 1
Fan			Airflow rate			m3/min			185
			Motor output			kW			0.38
			Type						Hermetic
Compressor			Motor output			kW			5.5
			Crankcase heater			kW			0.05 (240 V)
Refrigerant/Lubricant									R407C/FVC68D
External finish							Steel plate painting with polyester powder
								(MUNSELL 5Y8/1 or similar)
External dimension						mm		1,715(H) × 990(W) × 840(L)
Protection			High pressure protection			MPa			3.3
device			Compressor/Fan				Overcurrent protection/Thermal switch
Refrigerant piping diameter					Liquid/Gas	mm		ø12.7 Flare / ø25.4 Flange
Indoor unit									PEH-P8MYA
Noise level						dB (A)			56
Net weight						kg			215
Operating temperature range							Indoor: 15 °CWB~24 °CWB			Indoor: 15°CDB~27 °CDB
							Outdoor: –5 °CDB~46 °CDB			Outdoor: –12 °CWB~18 °CWB
1. Cooling/Heating capacity indicates the maximum value at operation under the following condition.
		Cooling		Indoor:	27 °CDB/19 °CWB		Outdoor:		35 °CDB
Notes:		Heating		Indoor:	20 °CDB		Outdoor:		7 °CDB/6 °CWB
				Pipe length: 7.5 m			Height difference: 0 m

2. Works not included: Installation/Foundation work, Electrical connection work, Duct work, Insulation work, Power source switch, and other items not specified in this specifications.

–8–

Specifications of air-source heat pump type packaged air conditioner (Outdoor unit)

Model name						PUH-P10MYA			Quantity
									Cooling		Heating
Capacity							kcal/h	22,400			26,200
							kW	26.0			30.5
Power source									3N~ 380/400/415 V 50 Hz
Power input							kW	9.02			8.62
Current							A	16.0			15.4
				Type x Quantity						Propeller fan × 1
Fan				Airflow rate			m3/min			185
				Motor output			kW			0.38
				Type						Hermetic
Compressor				Motor output			kW			7.5
				Crankcase heater			kW			0.05 (240 V)
Refrigerant/Lubricant										R407C/FVC68D
External finish								Steel plate painting with polyester powder
									(MUNSEL 5Y8/1 or similar)
External dimension							mm		1,715(H) × 990(W) × 840(L)
Protection				High pressure protection			MPa			3.3
device				Compressor/Fan				Overcurrent protection/Thermal switch
Refrigerant piping diameter						Liquid/Gas	mm		ø12.7 Flare / ø28.6 Flange
Indoor unit										PEH-P10MYA
Noise level							dB (A)			57
Net weight							kg			220
Operating temperature range								Indoor: 15 °CWB~24 °CWB			Indoor: 15 °CDB~27 °CDB
								Outdoor: –5 °CDB~46 °CDB			Outdoor: –12 °CWB~18 °CWB
	1. Cooling/Heating capacity indicates the maximum value at operation under the following condition.
			Cooling		Indoor:	27 °CDB/19 °CWB		Outdoor:		35 °CDB
Notes:			Heating		Indoor:	20 °CDB		Outdoor:		7 °CDB/6 °CWB
					Pipe length: 7.5 m			Height difference: 0 m
	2. Works not included: Installation/Foundation work, Electrical connection work, Duct work, Insulation
					work, Power source switch, and other items not specified in this specifications.

–9–

3 EXTERNAL DIMENSIONS

• Models PUH-P8MYA/P10MYA

<Accessory> •Refrigerantconnectingpipe......................................1pc. (Theconnectingpipeisfixedwiththeunit) •Packingforconnectingpipe......................................1pc. (Itisattachedcontrolboxcover) •Conduitmountingplate (Paintedthesamecolorastheunitbody) φ27............................................................................1pc. φ34............................................................................1pc. φ40............................................................................1pc. •Tappingscrew4x12..............................................4pcs.	Note:1. Pleaseleaveaspaceundertheoutdoorunitfor	thepipingwhenyouconnectedthepipingfrom	thebottom.	(Pleasebecarefulnottoclosetheholeofthe	bottomplatebythebasement.) 2.Itispossibletochangetoφ27orφ34byselecting theconduitmountingplate. 3.Theholesizecanbeselectedtoφ27orφ34or φ40byselectingtheconduitmountingplate.			Airoutlet
				910
15				880		15		225
				840
						215
						560	990	Planeview
						215
					4-14X20holes <Formounting anchorboltM8>	(Fieldsupply)
								Y-Y
5				50				section
6								Cross
	Note2φ38.1Knockouthole	<Bottomsideholefor	thepowersupply>	φ25.4Knockouthole	<Bottomsideholefor thecontrolwiring>
					121
	Y				Y		55	sectionX-X
							378	Cross

				160
		hole		25
			80	73
1Note	Knockouthole	pipingBottom	198	pipeConnecting	φ8:25.4<brazed>	φ10:28.6<brazed>
			237

Air	inlet
		φ25.4Knockouthole <Rightsideholefor				φ38.1Knockouthole	<Rightsideholefor	thepowersupply>			Rightsideview
Air inlet			controlthewiring>		60	65
						84
1715							panel
	1490	X					Service
						Note3	Knockouthole	for	supplyand	controlwiring>	view
								<Frontsidehole	55
									powerthe
							413		190		Front
						80			165
		X		pipingFronthole		79			31
holeKnockout gaugePressure option)(for	serviceRefrig. (liquid)valve	φ12.7<flare>	Knockouthole		40	70	serviceRefrig.	valve(gas)	<flange>
					149
			φ38.1Knockouthole <Leftsideholefor thepowersupply>		194
					100	48

75	40
60	80

φ25.4Knockouthole <Leftsideholefor thecontrolwiring> Knockouthole Leftpipinghole

Leftsideview

234

251
100
Knockouthole Rearpipinghole (Itisnecessary fortheoption)	Rearview

–10–

4 ELECTRICAL WIRING DIAGRAM

[1] Outdoor Unit

• Model PUH-P8MYA/P10MYA

MC

SV1

CH

63H1

63L

(*1)

21S4

TH1

TH2

TH3

MF

LEV

WHITE

BLACK

RED

1

3

1

3

2

1

2

1

2

1

C11

C12

51C

CN23

(3P)

CNVMNT

CNMNT

CN40

CN2

CN3

CN4

(3P)

(3P)

1

(3P)

(5P)

(6P)

(2P)

(2P)

(2P)

3

CN3D

CN22 (3P)

1

(*3)

(3P)

3

O

CN3S

X1

3

1

CN21

(3P)

OFF

1

4

(3P)

1

3

SW5

CN3N

O

O

52C

X04

(3P)

1

CN26

(5P)

OFF

OFF

1 2

1

6

3

SW1

CN24

52C

SW3

SW4

3

2

51C

1

3

5

5

X03

LED1

(3P)

1

1

1

CN25 (3P)

O

CNFAN

1

CN27

C14

(5P)

3

OFF

(2P)

CNFC2

1

6

(3P)

F.C.

(6P)

CN53 (3P)

X01

SW2

52C

BOARD

6

1

CNPO

3

(5P)

CN81

1

CN52 (6P)

X02

(3P)

CNOUT1

1

3

5

1

3

3

X05

(5P)

5

CNOUT2

CN51

1

F10

6

3

(3P)

1

CNFC1 (6P)

(5P)

F20

5

7

F30

Transmission

CNIN

N.F.BOARD

6

Circuit

(7P)

L1

7

CN20(7P)

F01

N

DC power

F04

supply

L2

L3

1

F02

RED WHITE BLACK

BLUE

GREEN/YELLOW

F03

F1

X1

CNFG

CNS3

CN28

CN34

F2

(3P)

(3P)

(3P)

(3P)

PE

3

1

3

1

3

1

3

1

TB1

TR

TB3

TB8

L1 L2 L3

N PE

S1 S2 S3

OUT OUT IN IN

PE

INDOOR UNIT

OUTDOOR UNIT CONTROL BOX

TO INDOOR UNIT

CIRCUIT BREAKER

CONNECTING WIRES (*2)

TB4

(FIELD SUPPLY)

(POLER)

PUH-P8MYA-EU : 50A

S1

PUH-P10MYA-EU: 60A

S2

POWER SUPPLY

S3

3N~PE

380/400/415V

50HZ

63H2

Note :

1.Be sure to apply earth work to the unit. (Use the earth terminal of TB1.)

2.The dotted lines show field wiring.

3.Color of earth wire is yellow and green twisting.

4.This motor (*1) includes auto reset type internal thermostat.

5.Indoor and outdoor connecting wires (*2) are made with polarities, make sure matching wiring and terminal.

6.SW5 (*3) is shown PUH-P10MYA setting.

In case of PUH-P8MYA setting is shown as below.

(*3)

ON OFF

1 4 SW5

Caution :

1.To protect compressor from abnormal current, over current relays is installed. Therefore, do not change factory set value of over current relays.

	Symbol	Name	Symbol	Name
	F1, F2	FUSE (15A 250VAC CLASS T)	SW1~SW5	SWITCH (MAIN BORD)
	F01~F04	FUSE (6.3A 250VAC CLASS F)	21S4	4-WAY VALVE
	F10~F30	FUSE (6.3A 250VAC CLASS F)	SV1	SOLENOID VALVE
	51C	OVER CURRENT RELAY (COMPRESSOR)	CH	CRANK CASE HEATER (COMPRESSOR)
	52C	MAGNETIC CONTACTOR (COMPRESSOR)	LEV	ELECTRINIC EXPANSION VALVE
	63L	PRESSURE SWITCH (LOW PRESSURE)	TH1		LIQUID TEMP.
	63H1	PRESSURE SWITCH (HIGH PRESSURE)	TH2	THERMISTOR	DISCHARGE TEMP.
	63H2	PRESSURE SWITCH (FOR CONTROL)	TH3		COND./EVA. TEMP.
	MC	COMPRESSOR MOTOR	TB1	POWER SOURCE TERMINAL BLOCK
	MF	FAN MOTOR (OUTDOOR)	TB3, 4	OUTDOOR/INDOOR CONNECTION TERMINAL BLOCK
	TR	TRANSFORMER	TB8	TERMINAL BLOCK (FOR 16, 20HP)
	X1	AUXILIARY RELAY (FOR 16, 20HP)	C11, C12	CONNECTOR (FAN MOTOR)
	LED 1	LED (FOR SERVICE)	C14	CONNECTOR (63H2)
	XO1~X05	AUXILIARY RELAY (MAIN BOARD)	CAFAN, CNFC2	CONNECTOR (F. C. BOARD)
	CN2,CN20~28		CNPO
	CN3,34,30,3N,3S		CNOUT1, 2	CONNECTOR (N, F. BOARD)
	CN4,40,51~53,81	CONNECTOR MAIN BOARD	CNIN
	CNFC1, FG, S3
	CNMT,VMNT

–11–

[2] Skelton of Indoor/Outdoor Connection

(1) Applicable combinations of 8 & 10HP [PUH-P8MYA/P10MYA]

		Single	50 : 50	33 : 33 : 33	25 : 25 : 50 20 : 40 : 40		25 : 25 : 25 : 25
	Indoor Units	8HP	4HP+4HP	2.5HP+2.5HP	2HP+2HP	1.6HP+3HP	2HP+2HP
				+2.5HP	+4HP	+3HP	+2HP+2HP
P8MYA-	PEH-P*MYA		–	–	–	–	–
	PLH-P*KAH, PLH-P*AAH	–
	PLA-P*KA, PLA-P*AA
PUH	PEHD-P*EAH, PEAD-P*EA	–
	PCH-P*GAH, PCA-P*GA	–				–
	PKH-P*GALH, PKH-P*FALH	–
	PKA-P*GAL, PKA-P*FAL
	PSH-P*GAH, PSA-P*GA	–		–	–	–	–
	Indoor Units	10HP	5HP+5HP	3HP+3HP	2.5HP+2.5HP	2HP+4HP	2.5HP+2.5HP+
				+3HP	+5HP	+4HP	2.5HP+2.5HP
P10MYA-	PEH-P*MYA		–	–	–	–	–
	PLH-P*KAH, PLH-P*AAH	–
	PLA-P*KA, PLA-P*AA
PUH	PEHD-P*EAH, PEAD-P*EA	–
	PCH-P*GAH, PCA-P*GA	–
	PKH-P*GALH, PKH-P*FALH	–	–		–
	PKA-P*GAL, PKA-P*FAL
	PSH-P*GAH, PSA-P*GA	–			–	–	–
	Multi distributor pipes	–	SDD-50WSA-E SDT-111SA-E		SDT-112SA-E SDT-122SA-E		SDT-1111SA-E
	(Option)

*indicates applicable HP.

(2)System

Single

Triple

Indoor units

Indoor unit

3-core cable

3-core cable

Transmission line

	Transmission
	line	Distributor
	Remote
Remote	controller
controller

Outdoor unit Pipework

Outdoor unit

Pipe work

Twin		Four
	Indoor units			Indoor units

3-core cable		3-core cable
Transmission
line		Transmission
	Distributor		Distributor
		line
Remote
controller		Remote
		controller
Outdoor unit		Outdoor unit
Pipe work
		Pipe work

–12–

5 Technical Data of PUH-P8MYA/P10MYA to Meet LVD

[1] Standard Operation Data

(1) PUH-P8MYA

		Operating condition				Cooling			Heating
	condition	Voltage		V	380	400	415	380	400	415
		Power source frequency		Hz	50	50	50	50	50	50
		Indoor air condition (DB/WB)		°C	27/19	27/19	27/19	20/–	20/–	20/–
	Operating	Outdoor air condition (DB/WB)		°C	35/-	35/–	35/–	7/6	7/6	7/6
		Piping length		m	7.5	7.5	7.5	7.5	7.5	7.5
		Refrigerant charge		kg	6.9	6.9	6.9	6.9	6.9	6.9
	characteristics		Current	A	13.0	13.0	13.0	12.8	12.8	12.8
		Outdoor unit	Input	kW	7.27	7.27	7.27	7.17	7.17	7.17
			Compressor current	A	11.9	11.9	11.9	11.7	11.7	11.7
			Fan current	A	1.1	1.1	1.1	1.1	1.1	1.1
	Electrical
		Indoor unit	Current	A	1.12	1.12	1.12	1.12	1.12	1.12
			Input	kW	0.65	0.65	0.65	0.65	0.65	0.65
		Discharge pressure		MPa	2.11	2.11	2.11	1.91	1.91	1.91
	circuit
		Suction pressure		MPa	0.48	0.48	0.48	0.40	0.40	0.40
		Discharge refrigerant temperature		°C	75	75	75	70	70	70
	Refrigerant
		Suction refrigerant temperature		°C	6	6	6	0	0	0
		Liquid pipe temperature (at piping sensor)		°C	46	46	46	0	0	0
		Compressor shell bottom temperature		°C	35	35	35	30	30	30

Note: The values listed above indicate that when connected with the indoor unit PEH-P8MYA as representative data.

(2) PUH-P10MYA

		Operating condition					Cooling			Heating
	condition	Voltage			V	380	400	415	380	400	415
		Power source frequency			Hz	50	50	50	50	50	50
		Indoor air condition (DB/WB)			°C	27/19	27/19	27/19	20/–	20/–	20/–
	Operating
		Outdoor air condition (DB/WB)			°C	35/-	35/–	35/–	7/6	7/6	7/6
		Piping length			m	7.5	7.5	7.5	7.5	7.5	7.5
		Refrigerant charge			kg	7.4	7.4	7.4	7.4	7.4	7.4
	characteristics			Current	A	16.0	16.0	16.0	15.4	15.4	15.4
		Outdoor unit		Input	kW	9.02	9.02	9.02	8.62	8.62	8.62
				Compressor current	A	14.9	14.9	14.9	14.3	14.3	14.3
	Electrical			Fan current	A	1.1	1.1	1.1	1.1	1.1	1.1
				Input	kW	0.94	0.94	0.94	0.94	0.94	0.94
		Indoor unit		Current	A	1.64	1.64	1.64	1.64	1.64	1.64
		Discharge pressure			MPa	2.22	2.22	2.22	1.75	1.75	1.75
	circuit
		Suction pressure			MPa	0.50	0.50	0.50	0.38	0.38	0.38
	Refrigerant	Discharge refrigerant temperature			°C	80	80	80	65	65	65
		Suction refrigerant temperature			°C	8	8	8	–1	–1	–1
		Liquid pipe temperature (at piping sensor)			°C	48	48	48	0	0	0
		Compressor shell bottom temperature			°C	30	30	30	20	20	20

Note: The values listed above indicate that when connected with the indoor unit PEH-P10MYA as representative data.

–13–

[2] Cooling Capacity Curves

• PUH-P8MYA/P10MYA

1.4

			Indoor
			inlet
				air
					wet
	1.2					bulb	temp.
							<˚CW
							B>
ratio
							22
Capacity	1
								20
	0.8							18
							16
	0.6
			3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45
	-5 -3 -1 1
			Outdoor air temperature <˚CDB>

Input ratio

1.22

1.1

0.9

Indoor

air	wet

inlet

22

20

18

16

	<˚CWB>
	.
bulb	temp

0.7

-5 -3 -1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45

Outdoor air temperature <˚CDB>

[3] Heating Capacity Curves

• PUH-P8MYA/P10MYA

Capacity ratio

1.4

1.2

1

0.8

		air	dry
	inlet
Indoor

	.<˚CDB>
bulb	temp

15

20

25

Input ratio

1.4

1.2

1

0.8

	dry
	air
Indoor	inlet

	.<˚CDB>
bulb	temp

25

20

15

0.6			0.6
-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18			-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18
	Outdoor air temperature <˚CWB>			Outdoor air temperature <˚CWB>

–14–

[4] Capacity Reduction Ratio due to Changes in Piping Length

(1) Cooling capacity

Capacity ratio

1

0.9

	PUH-P8MYA					PUH-P10MYA
			ratio	1
			Capacity	0.9

0.8										0.8
0		10	20	30	40	50	60	70		0		10	20	30	40	50	60	70
			Equivalent piping length (m)											Equivalent piping length (m)

(2) Heating capacity

	Model name		Equivalent piping length
		- 30 m		30 - 50 m	50 - 70 m
	PUH-P8MYA	1.0		0.995	0.99
	PUH-P10MYA

(3) Calculation formula of equivalent piping length

	PUH-P8MYA		Equivalent piping length (m) = Actual piping length (m) + (0.47 × Number of bend)
	PUH-P10MYA		Equivalent piping length (m) = Actual piping length (m) + (0.5 × Number of bend)
(4) Reduction ratio by frosting
	Outdoor unit inlet wet bulb temperature			Heating capacity reduction ratio
	(°CWB)
	6			1.0
	4			0.98
	2			0.88
	0			0.85
	–2			0.86
	–4			0.89
	–6			0.92
	–8			0.92
	–10			0.92

–15–