Mitsubishi Electronics PUHY-P-YMF-B User Manual

Air-Conditioners

OUTDOOR UNIT g e p r ü f t e

S i c h e r h e i t

PUHY-P-YMF-B

FOR INSTALLER

FÜR INSTALLATEURE

POUR L’INSTALLATEUR

VOOR DE INSTALLATEUR

PER L’INSTALLATORE

INSTALLATION MANUAL

For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.

Remote controller (PAR-F25MA) is available as an optional remote controller.

INSTALLATIONSHANDBUCH

Zum sicheren und ordnungsgemäßen Gebrauch der Klimageräte das Installationshandbuch gründlich durchlesen.

Fernbedienung (PAR-F25MA) ist als Zubehör wahlweise erhältlich.

MANUEL D’INSTALLATION

Veuillez lire le manuel d’installation en entier avant d’installer ce climatiseur pour éviter tout accident et vous assurer d’u ne utilisation correcte.

La télécommande (PAR-F25MA) est disponible en option.

INSTALLATIEHANDLEIDING

Voor een veilig en juist gebruik moet u deze installatiehandleiding grondig doorlezen voordat u de airconditioner installeert.

De afstandsbedieningseenheid (PAR-F25MA) is verkrijgbaar als een optioneel toe te voegen afstandsbediening.

MANUALE DI INSTALLAZIONE

Per un uso sicuro e corretto, leggere attentamente questo manuale di installazione prima di installare il condizionatore d’aria.

Il comando a distanza (modello PAR-F25MA) disponibile in opzione.

ENGLISH

DEUTSCH

FRANÇAIS NEDERLANDS ITALIANO

ENGLISH

Contents
1. Safety precautions ......................................................................	3
1.1. Before installation and electric work ...............................	3
1.2. Precautions for devices that use R407C refrigerant .......	3
1.3. Before getting installed ...................................................	4
1.4. Before getting installed (moved) - electrical work ...........	4
1.5. Before starting the test run .............................................	4
2. Combination with indoor units .....................................................	5
3. Confirmation of parts attached ...................................................	5
4. Combination with outdoor units ...................................................	6
5. Selection of installation site ........................................................	6
6. Space required around unit ........................................................	6
6.1. Individual installation ......................................................	6
6.2. Collective installation and continuous installation ...........	7
7. Lifting method and weight of product ..........................................	8
8. Installation of unit ........................................................................	8
8.1. Location of anchor bolt ...................................................	8
8.2. Installation ......................................................................	9
8.3. Connecting direction for refrigerant piping ....................	10
8.4. Noise level ....................................................................	10
9. Caution for snow and seasonal wind ........................................	11
9.1. Snow and seasonal wind ..............................................	11
9.2. Countermeasure to seasonal wind ...............................	11
10. Refrigerant piping installation ..................................................	11
10.1. Areas of caution ..........................................................	12
10.2. Refrigerant piping system ...........................................	13
10.3. Caution for piping connection/valve operation ............	15
10.4. How to install branch pipe ...........................................	16
10.5. Airtight test and evacuation, refrigerant charging ........	18
10.6. Thermal insulation of refrigerant piping .......................	21
11. Electrical work .........................................................................	23
11.1. Caution ........................................................................	23
11.2. Control box and connecting position of wiring .............	24
11.3. Wiring transmission cables .........................................	25
11.4. Wiring of main power supply and equipment
capacity .......................................................................	31
12. Test run ....................................................................................	32
12.1. Checking before getting test run .................................	32
12.2. Test run method ..........................................................	32
12.3. How to cope with test run abnormality ........................	33
12.4. Coping with remote controller abnormality ..................	35
12.5. The following phenomena do not represent
abnormality (emergency) ............................................	36

2

1. Safety precautions

1.1. Before installation and electric work

sBefore installing the unit, make sure you read all the “Safety precautions”.

sThe “Safety precautions” provide very important points regarding safety. Make sure you follow them.

sThis equipment may not be applicable to EN61000-3- 2: 1995 and EN61000-3-3: 1995.

sThis equipment may cause the adverse effect on the same supply system.

sPlease report to or take consent by the supply authority before connection to the system.

Symbols used in the text

Warning:

Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution:

Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts. (This symbol is displayed on the main unit label.) <Color: Yellow>

: Indicates that the main switch must be turned off before servicing.

(This symbol is displayed on the main unit label.) <Color: Blue>

: Beware of electric shock. (This symbol is displayed on the main unit label.) <Color: Yellow>

: Beware of hot surface. (This symbol is displayed on the main unit label.) <Color: Yellow>

ELV : Please pay attention to electric shock fully because this is not Safety Extra Low-Voltage (SELV) circuit.

And at servicing, please shut down the power supply for both of Indoor Unit and Outdoor Unit.

Warning:

Carefully read the labels affixed to the main unit.

Warning:

•Ask the dealer or an authorized technician to install the air conditioner.

-Improper installation by the user may result in water leakage, electric shock, or fire.

•Install the air unit at a place that can withstand its weight.

-Inadequate strength may cause the unit to fall down, resulting in injuries.

•Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.

-Inadequate connection and fastening may generate heat and cause a fire.

•Prepare for typhoons and other strong winds and earthquakes and install the unit at the specified place.

-Improper installation may cause the unit to topple and result in injury.

•Always use an air cleaner, humidifier, electric heater, and other accessories specified by Mitsubishi Electric.

-Ask an authorized technician to install the accessories. Improper installation by the user may result in water leakage, electric shock, or fire.

•Never repair the unit. If the air conditioner must be repaired, consult the dealer.

-If the unit is repaired improperly, water leakage, electric shock, or fire may result.

•Do not touch the heat exchanger fins.

-Improper handling may result in injury.

•If refrigerant gas leaks during installation work, ventilate the room.

-If the refrigerant gas comes into contact with a flame, poisonous gases will be released.

•Install the air conditioner according to this Installation Manual.

-If the unit is installed improperly, water leakage, electric shock, or fire may result.

•Have all electric work done by a licensed electrician according to “Electric Facility Engineering Standard” and “Interior Wire Regulations”and the instructions given in this manual and always use a special circuit.

-If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result.

•Securely install the outdoor unit terminal cover (panel).

-If the terminal cover (panel) is not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result.

•When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R407C) specified on the unit.

-If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

•If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.

-Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.

•When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

-If the air conditioner is installed improperly, water leakage, electric shock, or fire may result.

•After completing installation work, make sure that refrigerant gas is not leaking.

-If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other heat source, it may generate noxious gases.

•Do not reconstruct or change the settings of the protection devices.

-If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

•To dispose of this product, consult your dealer.

•The installer and system specialist shall secure safety against leakage according to local regulation or standards.

-Following standards may be applicable if local regulation are not available.

•Pay a special attention to the place, such as a basement, etc. where refrigeration gas can stay, since refrigeration is heavier than the air.

1.2.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

ENGLISH

3

ENGLISH

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.

•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 connections.

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

•Use liquid refrigerant to fill 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 are 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.

1.3. Before getting installed

Caution:

•Do not install the unit where combustible gas may leak.

-If the gas leaks and accumulates around the unit, an explosion may result.

•Do not use the air conditioner where food, pets, plants, precision instruments, or artwork are kept.

-The quality of the food, etc. may deteriorate.

•Do not use the air conditioner in special environments.

-Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage its parts.

•When installing the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.

-The inverter equipment, private power generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.

•Do not install the unit on a structure that may cause leakage.

-When the room humidity exceeds 80% or when the drain pipe is clogged, condensation may drip from the indoor unit. Perform collective drainage work together with the outdoor unit, as required.

1.4.Before getting installed (moved) - electrical work

Caution:

•Ground the unit.

-Do not connect the ground wire to gas or water pipes, lightning rods, or telephone ground lines. Improper grounding may result in electric shock.

•The reverse phase of L lines (L1, L2, L3) can be detected (Error cord : 4103), but the reverse phase of L lines and N line can be not be detected.

-The some electric parts should be damaged when power is supplied under the miss wiring.

•Install the power cable so that tension is not applied to the cable.

-Tension may cause the cable to break and generate heat and cause a fire.

•Install an leak circuit breaker, as required.

-If an leak circuit breaker is not installed, electric shock may result.

•Use power line cables of sufficient current carrying capacity and rating.

-Cables that are too small may leak, generate heat, and cause a fire.

•Use only a circuit breaker and fuse of the specified capacity.

-A fuse or circuit breaker of a larger capacity or a steel or copper wire may result in a general unit failure or fire.

•Do not wash the air conditioner units.

-Washing them may cause an electric shock.

•Be careful that the installation base is not damaged by long use.

-If the damage is left uncorrected, the unit may fall and cause personal injury or property damage.

•Install the drain piping according to this Installation Manual to ensure proper drainage. Wrap thermal insulation around the pipes to prevent condensation.

-Improper drain piping may cause water leakage and damage to furniture and other possessions.

•Be very careful about product transportation.

-Only one person should not carry the product if it weighs more than

20 kg.

-Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.

-Do not touch the heat exchanger fins. Doing so may cut your fingers.

-When transporting the outdoor unit, suspend it at the specified positions on the unit base. Also support the outdoor unit at four points so that it cannot slip sideways.

•Safely dispose of the packing materials.

-Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.

-Tear apart and throw away plastic packaging bags so that children will not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.

1.5. Before starting the test run

Caution:

•Turn on the power at least 12 hours before starting operation.

-Starting operation immediately after turning on the main power switch can result in severe damage to internal parts. Keep the power switch turned on during the operational season.

•Do not touch the switches with wet fingers.

-Touching a switch with wet fingers can cause electric shock.

•Do not touch the refrigerant pipes during and immediately after operation.

-During and immediately after operation, the refrigerant pipes are may be hot and may be cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.

•Do not operate the air conditioner with the panels and guards removed.

-Rotating, hot, or high-voltage parts can cause injuries.

•Do not turn off the power immediately after stopping operation.

-Always wait at least five minutes before turning off the power. Otherwise, water leakage and trouble may occur.

4

2. Combination with indoor units

The indoor units connectable to this unit are shown below.

Outdoor unit model	Total capacity of	Quantity of connectable
	connected indoor unit		Model name of connectable indoor unit
name	models	indoor unit
			PMFY-P25 · 32 · 40 · 63	VBM
			PLFYP32 · 40 · 50 · 63 · 80 · 100 · 125	VKM
PUHY-P400	200 to 520		PLFYP25 · 32 · 40 · 50 · 63 · 80 · 100 · 125	VLMD
			PEFYP25 · 32	VML
		2 to 20	PEFYP40 · 50 · 63 · 71 · 80 · 100 · 125 · 140 · 200 · 250	VMH
			PCFYP40 · 63 · 100 · 125	VGM
			PKFYP25	VAM
PUHY-P500	250 to 650		PKFYP32 · 40 · 50	VGM
			PFFYP25 · 32 · 40 · 50 · 63	VLEM
			PFFYP25 · 32 · 40 · 50 · 63	VLRM
			PDFYP25 · 32 · 40 · 50 · 63 · 71 · 80 · 100 · 125	VM

	Note:		ENGLISH
	1.	The total capacity of connected indoor unit models represents the total sum of the figures expressed in the indoor model name.
	2.	Combinations in which the total capacity of the connected indoor units exceeds the capacity of the outdoor unit will reduce the capacity
		of each indoor unit below the rated capacity during simultaneous operation. Therefore, if circumstances allows, combine indoor units
		within the capacity of the outdoor unit.
	3.	A transmission booster (RP) is required when the number of connected indoor unit models in a cooling system exceeds the number of
		models specified in the chart below.
		* The maximum number of units that can be controlled is determined by the indoor unit model, the type of remote controller and their
		capabilities.

	Remote controller type
(*1)
Capability of the	Number of connected indoor units that can be
connected indoor units	connected without a RP.
	200 or lower
	200 or higher

Remote controller PAR-F 25MA

Prior to Ver. E	After Ver. F
16 (32)	20 (40)
16 (32)	16 (32)

The number of indoor units and the total number of remote controllers is displayed within the parenthesis ( ).

*1 If even one unit that is higher than 200 exists in the cooling system, the maximum capacity will be “200 or higher”.

3. Confirmation of parts attached

This outdoor unit is attached with the parts below. Please check the quantity for each item.

Model name

Model name

	Name	1 Conduit mounting plate	2 Conduit mounting plate	3 Conduit mounting plate	4 Tapping screw M4 × 10
		ø 62	ø 53	ø 46
	Shape
	PUHY-P400	1	1	1	6
	PUHY-P500
	Name	5 Connecting pipe	6 Packing	7 Wire mounting plate
	Shape
			inside ø 29, outside ø 39
	PUHY-P400	1	1	1
	PUHY-P500

*5 Connecting pipe is fixed with the unit.

5

ENGLISH

4. Combination with outdoor units

A Super Y (PUHY-P600/650/700/750YSMF-B) is produced when a Constant Capacity Unit (PUHN-P200/250YMF-B) is combined with this unit (PUHY-

P400/500YMF-B).

Refer to the installation manual that comes with the Constant Capacity Unit when this unit is used as a Super Y.

	Super Y	Variable capacity unit	Constant capacity unit
	PUHY-P600YSMF-B	PUHY-P400YMF-B	PUHN-P200YMF-B
	PUHY-P650YSMF-B		PUHN-P250YMF-B
	PUHY-P700YSMF-B	PUHY-P500YMF-B	PUHN-P200YMF-B
	PUHY-P750YSMF-B		PUHN-P250YMF-B

5. Selection of installation site

Select space for installing outdoor unit, which will meet the following		Installation restriction on outdoor unit when cooling operation is performed
conditions:		when the outdoor air temperature is 10° C or lower
• no direct thermal radiation from other heat sources
•	no possibility of annoying neighbors by noise from unit
•	no exposition to strong wind

•with strength which bears weight of unit

•note that drain flows out of unit when heating

• with space for air passage and service work shown below

Because of the possibility of fire, do not install unit to the space where	A
generation, inflow, stagnation, and leak of combustible gas is ex-
pected.

•Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.

•When having cooling operation at an outside air temperature of below 10° C, in order to obtain steady operation of unit, select an installation site not exposed directly to rain and snow, or install air outlet and inlet ducts. (Refer to Page 11.) Install the outdoor unit at the same position on the same floor, or above, the indoor unit. (See the figure at the right.)

•Do not use unit in any special environment where oil, steam and sulfuric gas exist.

(Same floor as indoor unit, or floor above)

A 4 m or less

6. Space required around unit

6.1. Individual installation

Basic space required

A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into account, a space of about 450 mm should be provided, the same as at the front.

	D
A
E	F
B
C
<Top view>	<Side view>

A 250 mm or more

B 450 mm or more

C Front (outside of machine room)

D Top discharge (open in principle)

E Front inlet (open in principle)

F Rear inlet (open in principle)

When inlet air enters from right and left sides of unit

A B

h

B

C

H

C A

D

<Side view>

A L1 or more

B L2 or more

C Front

D No restrictions on wall height (left and right)

Note:

•Wall heights (H) of the front and the back sides shall be within overall height of unit.

•When the total height is exceeded, add the “h” dimension of the figure above to L1 and L2 in the table above.

	Model	L1	L2
	PUHY-P400	450	250
	PUHY-P500

6

When unit is surrounded by walls

		A	B
B
	h	C		E
	D			h
A	H	650	325
				H

C

<Side view>

A L1 or more

B L2 or more

C Front

D Front panel

E Rear panel

Note:

•Wall heights (H) of the front and the back sides shall be within height of front panel and rear panel.

•If the panel height is exceeded, add the “h” dimension of the figure above to L1 and L2 in the table above.

	Model	L1	L2
	PUHY-P400	450	250
	PUHY-P500

Example: When h is 100

The L1 dimension becomes 450+100=550 mm.

When there is an obstruction above the unit

A

E

D

B

C F

When there is little space up to an obstruction

A 45° or more

B 300 mm or more

C Front

D 1000 mm or more

E Air outlet guide (Procured at the site)

F Rear

6.2.Collective installation and continuous installation

Space required for collective installation and continuous installation:

When installing several units, leave the space between each block as shown below considering passage for air and people.

B *E

A A

CC

D

B

*F

A

B B

C	C	C	C	C
*F	F	F	F	F	*E

A

BE

A	C	C	G A
	D B		E

BE

A

C C G

D A D

A (Must be open)

B Wall height (H)

C Front

D 1000 mm or more

E 250 mm or more

F 450 mm or more

G 900 mm or more

Note:

•Open in the two directions.

•In case wall height (H) exceeds overall height of unit, add “h” dimension (h=wall height <H> – overall height of unit) to * marked dimension.

•If there is a wall at both the front and the rear of the unit, install up to three units consecutively in the side direction and provide a space of 1000 mm or more as inlet space/passage space for each three units.

ENGLISH

7

ENGLISH

7. Lifting method and weight of product

•When carrying the unit suspended, pass the ropes under the unit and use the two suspension points each at the front and rear.

•Always lift the unit with ropes attached at four points so that impact is not applied to the unit.

•Attach the ropes to the unit at an angle of 40° or less.

•Use two ropes at least 8 m long.

A

B

Dangerous!

A 40° or less

B Rope suspension part

Weight of product:

PUHY-P400	PUHY-P500
455 kg	475 kg

Caution:

Be very careful to carry product.

-Do not have only one person to carry product if it is more than 20 kg.

-PP bands are used to pack some products. Do not use them as a mean for transportation because they are dangerous.

-Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.

-Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging bag may suffocate children to death.

-When carrying in outdoor unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make outdoor unit unstable, resulting in a fall of it.

8. Installation of unit

8.1.Location of anchor bolt

•Individual installation

880± 5

780± 2	780± 2
	A

•Example of collective installation

880± 5

		10			10
780± 2	780± 2	440	780± 2	780± 2	440	780± 2	780± 2

For collective installation, provide a 10 mm gap between units.

A (Service side)

8

8.2. Installation

D

•Fix unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.

•Use concrete or angle for foundation of unit.

•Vibration may be transmitted to the installation section and noise and vibration may be generated from the floor and walls, depending on the installation conditions. Therefore, provide ample vibrationproofing (cushion pads, cushion frame, etc.).

A

B

880± 5

C

Down piping and down wiring precautions

When down piping and down wiring are performed, be sure that foundation and base work does not block the base through holes. When down piping is performed, make the foundation at least 100 mm high so that the piping can pass under the bottom of the unit.

	694
230	150		80	82 78 A	80
		F	90
Ø62
111		Ø27
			73
			780 B		780 B

1760 C

1990 D

A Bottom piping through hole

B (bolt hole)

C (bolt hole for old models)

D (unit width)

E (unit depth)

F Bottom wiring through hole

EF

ABe sure that the corners are firmly seated. If the corners are not firmly seated, the installation feet may be bent.

B M10 anchor bolt procured at the site

C Corner is not seated.

DUnit

(Provide ample vibrationproofing between the unit and the foundation by using cushion pads, cushion frame, etc.)

	E Piping and wiring space (Bottom piping, bottom wiring)	ENGLISH
	F Concrete foundation
	Warning:
	• Be sure to install unit in a place strong enough to withstand its
	weight.
	Any lack of strength may cause unit to fall down, resulting in a
	personal injury.
	• Have installation work in order to protect against a strong wind
	and earthquake.
	Any installation deficiency may cause unit to fall down, result-
	ing in a personal injury.

When building the foundation, give full attention to the floor strength, drain water disposal <during operation, drain water flows out of the unit>, and piping and wiring routes.

		56
840 E	880 B	910
		56

15

9

8.3. Connecting direction for refrigerant

8.4. Noise level

piping

(50/60Hz)

Two connecting directions are available for refrigerant piping of the out-

PUHY-P400

PUHY-P500

door unit, bottom piping and front piping, as shown below:

60/61 dB(A)

1m

ENGLISH

A

B

C

A Knock-out hole

B Bottom piping

C Front piping

Note:

In the case of bottom piping, build a 100 mm or higher foundation so that piping will go through the bottom of the unit.

A

1m		B

A Front

B Measuring point

Measuring location: a room free from echoes and reverberations

10

9. Caution for snow and seasonal wind

In cold and/or snowy areas, sufficient countermeasures to wind and snow damages should be taken for operating unit in normal and good condition in winter time. Even in the other areas, full consideration is required for installation of unit in order to prevent abnormal operations caused by seasonal wind or snow. When rain and snow directly fall on unit in the case of air-conditioning operations in 10 or less degrees centigrade outdoor air, mount inlet and outlet ducts on unit for assuring stable operations.

9.1. Snow and seasonal wind

■Prevention of wind and snow damages in cold or snowy areas:

Refer to the figure of snow hood shown below:

•Snow hood

Note:

1.Height of frame base for snow damage prevention (H) shall be twice as high as expected snowfall. Width of frame base shall not exceed that of the unit. The frame base shall be made of angle steel, etc., and designed so that snow and wind slip through the structure. (If frame base is too wide, snow will be accumulated on it.)

2.Install unit so that seasonal wind will not directly lash against openings of inlet and outlet ducts.

3.Build frame base at customer referring to this figure.

Material	: Galvanized steel plate 1.2T
Painting	: Overall painting with polyester powder
Color	: Munsell 5Y8/1 (same as that of unit)

4.When the unit is used in a cold region and the heating operation is continuously performed for a long time when the outside air temperature is below freezing, install a heater to the unit base or take other appropriate measures to prevent water from freezing on the base.

1093		1888
	A	903

1145			821
		B	(670)	(1990)
500	(840)	500

B

H

A Outlet

B Inlet

9.2. Countermeasure to seasonal wind

Referring to the figure shown below, take appropriate measures which will suit the actual situation of the place for installation.

A A

A Seasonal wind

10. Refrigerant piping installation

Connecting the piping is a terminal-branch type in which refrigerant piping from the outdoor unit is branched at the terminal and connected to each of the indoor units.

The method of connection consists of flare connections at the indoor units, flange connections for the piping of the outdoor unit and flare connections for the liquid piping. Note that the branched sections are brazed.

Warning:

Always use extreme care to prevent the refrigerant gas (R22) from leaking while using fire or flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it breaks down and generates a poisonous gas which can cause gas poisoning. Never weld in an unventilated room. Always conduct an inspection for gas leakage after installation of the refrigerant piping has been completed.

ENGLISH

11

ENGLISH

10.1. Areas of caution

1Use the following materials for refrigeration piping.

•Material: Seamless phosphorous deoxidized copper pipe, C1220T-OL or C1220T-O (Note: C1220T-OL is preferred.)

•Size: Refer to Pages 13 to 14.

2 Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.

3 Use care to prevent dust, water or other contaminants from entering the piping during installation.

4 Reduce the number of bending portions as much as possible, and make bending radius as big as possible.

5 Always use the branch piping set shown below, which are sold separately.

Branch pipe set name

		Line branching				Header branching
	Total of units down-	Total of units down-	Total of units down-		4 branching	7 branching	10 branching
	stream less than 160	stream 161 to 330	stream more than	331
	CMY-Y102S-F	CMY-Y102L-F	CMY-Y202-F		CMY-Y104-E	CMY-Y107-E	CMY-Y1010-E

6If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut the connecting section and then use an adapter for connecting different diameters to connect the piping.

7Always observe the restrictions on the refrigerant piping (such as rated length, the difference between high/low pressures, and piping diameter).

Failure to do so can result in equipment failure or a decline in heating/cooling performance.

8 A second branch cannot be made after a header branch. (These are shown by × .)

A

A

B

A To Outdoor Unit

B Capped Piping

9 Always use good-quality materials for brazing.

0The City Multi Series Y will stop due an abnormality due to excessive or insufficient coolant. At such a time, always properly charge the unit. When servicing, always check the notes concerning pipe length and amount of additional refrigerant at both locations, the refrigerant volume calculation table on the back of the service panel and the additional refrigerant section on the labels for the combined number of indoor units. (Refer to Pages

13 to 14.)

A Use liquid refrigerant to fill the system.

B Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.

CAlways insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, water drops from condensation and other such problems. (Refer to Pages 21 to 22.)

DWhen connecting the refrigerant piping, make sure the ball valve of the outdoor unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the outdoor and indoor units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.

EAlways use a non-oxidizing brazing material for brazing the parts. If a non-oxidizing brazing material is not used, it could cause clogging or damage to the compressor unit. (Details of the piping connections and valve operation can be found on Pages 15 to 16.)

F Never perform outdoor unit piping connection work when it is raining.

Warning:

When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R407C) specified on the unit.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

Caution:

•Use refrigerant piping made of C1220T-OL phosphorus deoxidized copper. 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.

•Use liquid refrigerant for sealing.

-Sealing with gas refrigerant will change the composition of the refrigerant in the cylinder and reduce the unit’s performance.

•Never use existing refrigerant piping.

-The large amount of chlorine in conventional refrigerant and refrigerator oil in the existing piping will cause the new refrigerant to deteriorate.

•Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing.

-If dust, dirt, or water gets into the refrigerant cycle, the oil will deteriorate and the compressor may fail.

•Do not use a charging cylinder.

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

12

10.2. Refrigerant piping system

A

A

D

Note:

The model total for down-

stream units shown in the

table below is the model

total when viewed from

Line-Branch Method

A

L

Point A in the drawing

Connection Examples

above.

(Connecting to Five Indoor Units)

H

R

A Outdoor Unit

B

C

D

e

B First Branch

B

a

b

c

d

The first branch on the

outdoor unit must be

C

C

C

C

the CMY-Y202-F.

1

h

2

3

4

C

C Indoor unit

5

D To downstream units

Permissible

Total Piping Length

A+B+C+D+a+b+c+d+e is 220 m or less

Farthest Piping Length

(L)

A+B+C+D+e is 100 m or less

Length

Farthest Piping Length After First Branch (r)

B+C+D+e is 30 m or less

Permissible High/

High/Low Difference in Indoor/Outdoor Section (H)

50 m or less (If the outdoor unit is lower, 40 m or less)

Low Difference

High/Low Difference in Indoor/Indoor Section

(h)

15 m or less

■ Selecting the Refrigerant Branch Kit

Select the branch kit, sold separately, from the table below. (Each kit contains a refrigerant and

gas piping set.)

Use the table to the right to make the selection

based on the model total of indoor units down-

Downstream Unit Model Total

Branch Kit Model

stream from the branch section.

160 or less

CMY-Y102S-F

161 to 330

CMY-Y102L-F

331 or more

CMY-Y202-F

■ Select Each Section of Refrigerant Piping

(1) Refrigerant Piping Diameter In Section

(2) Refrigerant Piping Diameter In Section

From Outdoor Unit to First Branch (Out-

From Branch to Indoor Unit (Indoor Unit

(1) Section From Outdoor Unit

door Unit Piping Diameter)

Piping Diameter)

to First Branch (A)

Each

Model

Piping Diameter (mm)

Model number

Piping dia. (mm)

(2) Sections From Branch to

Section of

PUHY-P400

Liquid Line

ø 15.88

25 ·32 ·40

Liquid Line

ø 6.35

Indoor Unit (a,b,c,d,e)

Piping

Gas Line

ø 31.75

Gas Line

ø 12.7

(3) Section From Branch to

Liquid Line

ø 15.88

Liquid Line

ø 9.52

Branch (B, C, D)

PUHY-P500

50 ·63 ·71 ·80

Gas Line

ø 38.1

Gas Line

ø 15.88

Select the size from the table to the right.

(3) Refrigerant Piping Diameter In Section

100 ·125 ·140

Liquid Line

ø 9.52

Gas Line

ø 19.05

From Branch to Branch

Liquid Line

ø 12.7

Downstream Unit

Liquid Line

Gas Line

200

Model Total

(mm)

(mm)

Gas Line

ø 25.4

80 or less

ø 9.52

ø 15.88

250

Liquid Line

ø 12.7

81 to 160

ø 12.7

ø 19.05

Gas Line

ø 28.58

161 to 330

ø 12.7

ø 25.4

331 to 480

ø 15.88

ø 31.75

481 or more

ø 15.88

ø 38.1

■ Additional Refrigerant Charge

<Additional Charge>

At the time of shipping, the outdoor unit PUHY-P400

Liquid pipe size

Liquid pipe size

Liquid pipe size

Liquid pipe size

is charged with 16 kg of refrigerant and the PUHY-

Total length of

Total length of

Total length of

Total length of

P500 is charged with 22 kg. As this charge does not

ø 15.88 × 0.25

+

ø 12.7 ×

0.12

+

ø 9.52 ×

0.06

+

ø 6.35 × 0.024

+ α

include the amount needed for extended piping, ad-

ditional charging for each refrigerant line will be re-

(m) × 0.25 (kg/m)

(m) ×

0.12 (kg/m)

(m) ×

0.06 (kg/m)

(m) × 0.024 (kg/m)

quired on site. In order that future servicing may be

properly provided, always keep a record of the size

<Example>

and length of each refrigerant line and the amount of

Indoor 1 : 125

A : ø 15.88 40 m

a : ø 9.52

10 m

additional charge by writing it in the space provided

2 : 100

B : ø 12.7

10 m

b : ø 9.52

10 m

At the conditions

on the outdoor unit.

3 : 50

C : ø 12.7

5 m

c : ø 9.52

10 m

below:

■ Calculation of Additional Refrigerant Charge

4 : 32

D : ø 9.52

5 m

d : ø 6.35

5 m

• Calculate the amount of additional charge based

5 : 32

e : ø 6.35

10 m

on the length of the piping extension and the size

The total length of each liquid line is as follows:

of the refrigerant line.

α

ø 15.88 : A = 40 m

Value of

• Use the table to the right as guide to calculating

ø 12.7 : B + C = 10 + 5 = 15 m

Total capacity of

the amount of additional charging and charge the

α

ø 9.52 : D + a + b + c = 5 + 10 + 10 + 10 = 35 m

connecting indoor units

system according.

ø 6.35 : d + e = 5 + 10 = 15 m

• If the calculation results of the calculation result

to Model 80

1.0 kg

Therefore,

in a fraction of less than 0.1 kg, round up to the

Models 81 to 160

1.5 kg

<Calculation example>

next 0.1 kg. For example, if the result of the cal-

Models 161 to 330

2.0 kg

Additional

culation was 16.76 kg, round the result up to 16.8

refrigerant charge = 40 × 0.25 + 15 ×

0.12 + 35 × 0.06

Models 331 to 480

2.5 kg

kg.

+ 15 × 0.024 + 2.5 = 16.8 kg

Models 481 or more

3.0 kg

ENGLISH

13

ENGLISH

							Note:
		A					• Branch piping cannot be used
							again after the header branch.
							• The model total for down-
		A					stream units shown in the ta-
							ble below is the model total
					E
			C				when viewed from Point A in
Multiple Line/Header		B				F	the drawing above.
							A Outdoor Unit
Connection Example			c	d	e
							B First Branch (Branch Joint)
(When Connecting Five Indoor Units)	H	B	3	4	5
			D	D	D		The first branch must be the
							CMY-Y202-F when the out-
				L
							door unit and header branch
				R
						h	are to be used.
							C Branch Joint
				b
		C	a	2			D Indoor Unit
							E Branch Header
		1	D		D
							F Cap

Permissible

Total Piping Length

A+B+C+a+b+c+d+e is 220 m or less

Farthest Piping Length

(L)

A+B+b is 100 m or less

Length

Farthest Piping Length After First Branch (r)

B+b is 30 m or less

Permissible High/

High/Low Difference in Indoor/Outdoor Section (H)

50 m or less (If the outdoor unit is lower, 40 m or less)

Low Difference

High/Low Difference in Indoor/Indoor Section (h)

15 m or less

■ Selecting the Refrigerant Branch Kit

Select the branch kit, sold separately, from the table below. (Each kit contains a refrigerant and

gas piping set.)

Use the table to the right to make the selection

based on the model total of indoor

units down-

Line branching

Header branching

stream from the branch section or on the number

Total of units downstream

Total of units downstream

Total of units downstream

4 branching

7 branching

10 branching

of indoor units to be connected on the header

less than 160

161 to 330

more than 331

header

header

header

branch.

CMY-Y102S-F

CMY-Y102L-F

CMY-Y202-F

CMY-Y104-E

CMY-Y107-E

CMY-Y1010-E

■ Select Each Section of Refrigerant Piping

(1) Refrigerant Piping Diameter In Section

(2) Refrigerant Piping Diameter In Section

From Outdoor Unit to First Branch (Out-

From Branch to Indoor Unit (Indoor Unit

(1) Section From Outdoor Unit

door Unit Piping Diameter)

Piping Diameter)

to First Branch (A)

Each

Model

Piping Diameter (mm)

Model number

Piping dia. (mm)

(2) Sections From Branch to

Section of

PUHY-P400

Liquid Line

ø 15.88

25 ·32 ·40

Liquid Line

ø 6.35

Indoor Unit (a,b,c,d,e)

Piping

Gas Line

ø 31.75

Gas Line

ø 12.7

(3) Section From Branch to

PUHY-P500

Liquid Line

ø 15.88

50 ·63 ·71 ·80

Liquid Line

ø 9.52

Branch (B, C)

Gas Line

ø 38.1

Gas Line

ø 15.88

Select the size from the table to the right.

(3) Refrigerant Piping Diameter In Section

100 ·125 ·140

Liquid Line

ø 9.52

Gas Line

ø 19.05

From Branch to Branch

Liquid Line

ø 12.7

Downstream Unit

Liquid Line

Gas Line

200

Gas Line

ø 25.4

Model Total

(mm)

(mm)

80 or less

ø 9.52

ø 15.88

250

Liquid Line

ø 12.7

81 to 160

ø 12.7

ø 19.05

Gas Line

ø 28.58

161 to 330

ø 12.7

ø 25.4

331 to 480

ø 15.88

ø 31.75

481 or more

ø 15.88

ø 38.1

■ Additional Refrigerant Charge

<Additional Charge>

At the time of shipping, the outdoor unit PUHY-

Liquid pipe size

Liquid pipe size

Liquid pipe size

Liquid pipe size

P400 is charged with 16 kg of refrigerant and the

Total length of

Total length of

Total length of

Total length of

PUHY-P500 is charged with 22 kg. As this charge

ø 15.88 × 0.25

+

ø 12.7 ×

0.12

+

ø 9.52 ×

0.06

+

ø 6.35 × 0.024

+ α

does not include the amount needed for extended

piping, additional charging for each refrigerant

(m) × 0.25 (kg/m)

(m) ×

0.12 (kg/m)

(m) ×

0.06 (kg/m)

(m) × 0.024 (kg/m)

line will be required on site. In order that future

servicing may be properly provided, always keep

<Example>

a record of the size and length of each refriger-

Indoor 1 : 125

A : ø 15.88

30 m

a : ø 9.52

10 m

ant line and the amount of additional charge by

2 : 100

B : ø 12.7

10 m

b : ø 9.52

20 m

At the conditions

writing it in the space provided on the outdoor

3 : 40

C : ø 12.7

15 m

c : ø 6.35

10 m

unit.

below:

4 : 32

d : ø 6.35

10 m

■ Calculation of Additional Refrigerant Charge

5 : 32

e : ø 6.35

10 m

• Calculate the amount of additional charge

The total length of each liquid line is as follows:

based on the length of the piping extension

ø 15.88 : A = 30 m

Value of α

and the size of the refrigerant line.

ø 12.7 : B + C = 10 + 15 = 25 m

• Use the table to the right as guide to calculat-

ø 9.52 : a + b = 10 + 20 = 30 m

Total capacity of

α

ing the amount of additional charging and

connecting indoor units

ø 6.35 : c + d + e = 10 + 10 + 10 = 30 m

charge the system according.

Therefore,

to Model 80

1.0 kg

• If the calculation results of the calculation re-

<Calculation example>

Models 81 to 160

1.5 kg

sult in a fraction of less than 0.1 kg, round up

Additional

Models 161 to 330

2.0 kg

to the next 0.1 kg. For example, if the result

refrigerant charge = 30 × 0.25 + 15 ×

0.12 + 30 × 0.06

Models 331 to 480

2.5 kg

of the calculation was 14.32 kg, round the

+ 30 × 0.024 + 2.5 = 14.4 kg

Models 481 or more

3.0 kg

result up to 14.4 kg.

14

10.3.Caution for piping connection/valve operation

•Conduct piping connection and valve operation accurately by following the figure below.

•The gas side connecting pipe is being assembled for shipment.

(See the figure at the right.)

1 For brazing to the connecting pipe with flange, remove the connecting pipe with flange from the ball valve, and braze it at the outside of the unit.

2During the time when removing the connecting pipe with flange, remove the seal attached on the back side of this sheet and paste it onto the flange surface of the ball valve to prevent the entry of dust into the valve.

3The refrigerant circuit is closed with a round, close-packed packing at the shipment to prevent gas leak between flanges. As no operation can be done under this state, be sure replace the packing with the hollow packing attached at the piping connection.

4At the mounting of the hollow packing, wipe off dust attached on the flange sheet surface and the packing. Coat refrigerating machine oil onto both surfaces of the packing.

[Ball valve (liquid side)]

A

3

1 B

A Replace the close-packed packing

B Hollow packing

• After evacuation and refrigerant charge, ensure that the handle is fully open. If operating with the valve closed, abnormal pressure will be imparted to the highor low-pressure side of the refrigerant circuit, giving damage to the compressor, four-way valve, etc.

• Determine the amount of additional refrigerant charge by using the	ENGLISH
formula, and charge refrigerant additionally through the service port
after completing piping connection work.
• After completing work, tighten the service port and cap securely not
to generate gas leak.
[Ball valve (gas side)]

EE

F

O

G

H

I

O

S

J

K

A

S

B

C

D

(This figure shows the valve in the fully open state.)

15

AValve stem

[Fully closed at the factory, when connecting the piping, when evacuating, and when charging additional refrigerant. Open fully after the operations above are completed.]

B Stopper pin [Prevents the valve stem from turning 90° or more.]

C Packing (Accessory)

DConnecting pipe (Accessory)

[Use packing and securely install this pipe to the valve flange so that gas leakage will not occur. (Tightening torque: 43 N·m (430 kg-cm)) Coat both surfaces of the packing with refrigerator oil.]

E Open (Operate slowly)

FCap, copper packing

[Remove the cap and operate the valve stem. Always reinstall the cap after operation is completed. (Valve stem cap tightening torque: 25 N·m (250 kg-cm) or more)]

GService port

[Use this port to evacuate the refrigerant piping and add an additional charge at the site.

Open and close the port using a double-ended wrench.

Always reinstall the cap after operation is completed. (Service port cap tightening torque: 14 N·m (140 kg-cm) or more)]

		H Flare nut
		[Tightening torque: 80 N·m (800 kg-cm)
ENGLISH		Loosen and tighten this nut using a double-ended wrench.
		Coat the flare contact surface with refrigerator oil.]
		I ø 15.88
		J ø 31.75 (PUHY-P400)
		ø 38.1 (PUHY-P500)
		K Field piping
		[Braze to the connecting pipe. (When brazing, use unoxidized brazing.)]
	Appropriate tightening torque by torque wrench
		Copper pipe external dia. (mm)		Tightening torque (N·m) / (kg-cm)
		ø 6.35		14 to 18 / 140 to 180
		ø 9.52		35 to 42 / 350 to 420
		ø 12.7		50 to 57.5 / 500 to 575
		ø 15.88		75 to 80 / 750 to 800
		ø 19.05		100 to 140 / 1000 to 1400
	Tightening angle standard
		Pipe diameter (mm)	Tightening angle (° )
		ø 6.35, ø 9.52	60 to 90
		ø 12.7, ø 15.88	30 to 60
		ø 19.05	20 to 35

Note:

If a torque wrench is not available, use the following method as a standard.

When you tighten the flare nut with a wrench, you will reach a point where the tightening torque will abrupt increase. Turn the flare nut beyond this point by the angle shown in the table above.

Caution:

•Always remove the connecting pipe from the ball valve and braze it outside the unit.

-Brazing the connecting pipe while it is installed will heat the ball valve and cause trouble or gas leakage. The piping, etc. inside the unit may also be burned.

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

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

10.4. How to install branch pipe

For detail, please observe the instruction manual attached to the optional refrigerant branch kit.

■ Joint

A B

A To Outdoor Unit

B To Branch Piping or Indoor Unit

•Apart from the CMY-Y202-F gas side, there are no restrictions on the posture for attaching joints.

•Ensure that the branch pipes for the CMY-Y202-F gas side are attached horizontally or facing upwards. (See the diagram below.)

Horizontal		Facing upwards
	(Facing downwards is not possible)
		Within ± 15˚
Within ±	15˚	Within ± 15˚

•There is no limitation on the joint mounting configuration.

•If the diameter of the refrigerant piping selected by the procedures described on pages 13 to 14 is different from the size of the joint, match the sizes using a deformed joint. The deformed joint is included with the kit.

16

■ Header

C

			D
	A	C Pipe cutter
		D or
	B
		E Deformed joint	E
	A To outdoor unit
	B To indoor unit
	• No restriction is applied to the mounting posture of the header.	• When the number of pipes to be connected is smaller than the number
	• If the diameter of the refrigerant piping selected using the proce-	of header branches, install a cap to the unconnected branches. The

dures described on pages 14 and the size of the joint is different,	cap is included with the kit.
match the sizes using a deformed joint. The deformed joint is in-
cluded with the kit.

ENGLISH

17

10.5. Airtight test and evacuation, refrigerant charging

1Airtight test

Perform with the stop valve of the outdoor unit closed, and pressurize the connection piping and the indoor unit from the service port provided on the stop valve of the outdoor unit. (Always pressurize from both the liquid pipe and the gas pipe service ports.)

A Nitrogen gas

B To indoor unit

C System analyzer

D Lo Knob

E Hi Knob

F Ball valve

G Liquid pipe

H Gas pipe

I Outdoor unit

J Service port

				F
		B		G
				H
		LO C	HI	I
	A	LO	HI
		D	E	J
	C

The method of conducting the airtight test is basically the same as for older models. However, since the restrictions have a large affect on deterioration of the refrigerator oil, always observe them. Also, with nonazeotropic refrigerant (R407C, etc.), gas leakage causes the composition to change and affects performance. Therefore, since the entire amount must be replaced if gas leakage occurs, perform the airtightness test cautiously.

ENGLISH
		Airtight test procedure	Restriction
	1. Nitrogen gas pressurization		• If a flammable gas or air (oxygen) is used as the pres-
	(1)	After pressurizing to the design pressure (2.98 MPa) using nitrogen gas, let stand	surization gas, it may catch fire or explode.
		for about one day. If the pressure does not drop, airtightness is good.
		However, if the pressure drops, since the leaking point is unknown, the following
		bubble test may also be performed.
	(2)	After the pressurization described above, spray the flare connection parts, brazed
		parts, flanges, and other parts that may leak with a bubbling agent (Kyuboflex,
		etc.) and visually check for bubbles.
	(3)	After the airtight test, wipe off the bubbling agent.
	2. Pressurization using refrigerant gas and nitrogen gas		• Do not use a refrigerant other than that indicated on the
	(1)	After sealing with liquid R407C from a cylinder and pressurizing to a gas pressure	unit.
		of approximately 0.2 MPa, pressurize to the design pressure (2.98 MPa) using	• Sealing with gas from a cylinder will cause the composi-
		nitrogen gas.	tion of the refrigerant in the cylinder to change.
		However, do not pressurize at one time. Stop during pressurization and check that	• Use a pressure gauge, charge box, and other parts es-
		the pressure does not drop.	pecially for R407C.
	(2)	Check for gas leaks by checking the flare connection parts, brazed parts, flanges,	• An electric leak detector for R22 cannot detect leaks.
		and other parts which may leak using an R407C compatible electric leak detector.	• Do not use a haloid torch. (Leaks cannot be detected.)
	(3)	This test may be used together the with bubble type gas leak test.

Caution:

Do not use a refrigerant other than R407C.

- If a refrigerant (R22, etc,) other than R407C is used, the chlorine in the refrigerant will cause the refrigerator oil to deteriorate.

18

2Evacuation

As shown in the figure below, evacuate with the stop valve of the outdoor unit closed and evacuate both the connection piping and the indoor unit from the service port provided on the stop valve of the outdoor unit using a vacuum pump. (Always evacuate from the service port of both the liquid pipe and the gas pipe.) After the vacuum reaches 650 Pa, continue evacuation for at least one hour or more. Then, stop the vacuum pump and let stand for one day and check if they vacuum does not rise. (If the vacuum rises, since water may be mixed in, pressurize up to 0.05 MPa using dry nitrogen gas and evacuate again.)

Evacuate from the service port of the ball valve with a vacuum pump.

Finally, seal with liquid refrigerant from the liquid pipe. Moreover, during operation, adjust the refrigerant amount from the gas pipe so that the refrigerant is always an appropriate amount.

*Never perform air purging using refrigerant.

A System analyzer

B Lo Knob

C Hi Knob

D Ball valve

E Liquid pipe

F Gas pipe

G Service port

H Three-way joint

I Valve

J Valve

K R407C cylinder

		D
			E
			F
LO A	HII
B	C		G
		H	I

JM

K

L

LScale

Use a graviometer. (One that can measure down to 0.1 kg.)

MVacuum pump

Use a vacuum pump with a reverse flow check valve.

(Recommended vacuum gauge: ROBINAIR 14830A Thermistor Vacuum Gauge)

Also use a vacuum gauge that reaches 65 Pa or greater after operating for five minutes.

ENGLISH

19

3Refrigerant Charging

Since the refrigerant used with the unit is nonazerotropic, it must be charged in the liquid state. Consequently, when charging the unit with refrigerant from a cylinder, if the cylinder does not have a syphon pipe, charge the liquid refrigerant by turning the cylinder upside-down as shown below. If the cylinder has a syphon valve like that shown in the figure at the right, the liquid refrigerant can be charged with the cylinder standing upright.

Therefore, give careful attention to the cylinder specifications. If the unit should be charged with gas refrigerant, replace all the refrigerant with new refrigerant. Do not use the refrigerant remaining in the cylinder.

B

A

C

A

ENGLISH

A R407C cylinder

[When cylinder does not have a syphon pipe]	[When cylinder has a syphon pipe
	(Refrigerant can be charged with the
	cylinder standing upright.)]

B Syphon pipe

C Liquid refrigerant

Note:

Always add an appropriate amount of refrigerant. (For the refrigerant additional charge, see pages 13 to 14.) Also always seal the system with liquid refrigerant. Too much or too little refrigerant will cause trouble.

Use a gauge manifold, charging hose, and other parts for the refrigerant indicated on the unit.

Note that it is not possible to determine if a correct amount is being used with the accumulator level (AL).

Warning:

When installing or moving the unit, do not charge it with refrigerant other than the refrigerant (R407C) specified on the unit.

- Mixing of different refrigerant, air, etc. may cause the refrigerant cycle to malfunction and result in severe damage.

Caution:

•Use a vacuum pump with a reverse flow check valve.

-If the vacuum pump does not have a reverse flow check valve, the vacuum pump oil may flow back into the refrigerant cycle and cause deterioration of the refrigerator oil and other trouble.

•Do not use a charging cylinder.

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

•Do not use the tools shown below used with conventional refrigerant.

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

-Mixing of conventional refrigerant and refrigerator oil may cause the refrigerator oil to deteriorate.

-Mixing of water will cause the refrigerator oil to deteriorate.

- R407C refrigerant does not contain any chlorine. Therefore, gas leak detectors for conventional refrigerants will not react to it.

•Manage the tools more carefully than normal.

- If dust, dirt, or water gets in the refrigerant cycle, the refrigerator oil will deteriorate.

20

10.6.Thermal insulation of refrigerant piping

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.

B A C

	Heat	Glass fiber + Steel wire
	insulation	Adhesive + Heat - resistant polyethylene foam +
	material A	Adhesive tape
	Outer	Indoor	Vinyl tape
		Floor exposed	Water-proof hemp cloth + Bronze asphalt
	covering B
		Outdoor	Water-proof hemp cloth + Zinc plate + Oily paint

Note:

When using polyethylene cover as covering material, asphalt roofing shall not be required.

DE

A Steel wire

B Piping

C Asphaltic oily mastic or asphalt

D Heat insulation material A

E Outer covering B

• Do not insulate gas or low pressure pipe and liquid or high •		Be sure to fully insulate connecting portion.
pressure pipe together.
B	A Liquid pipe	A
A	B Gas pipe
Bad example
	C Electric wire
	C D Finishing tape
	E Insulating material

E D

A These parts are not insulated.

EE A Liquid pipe

		B Gas pipe
Good example	B	A D Finishing tape
		E Insulating material

D

Note:

No heat insulation must be provided for electric wires.

ENGLISH

21

ENGLISH

Penetrations

Inner wall (concealed)

A B

Floor (fireproofing)

D

F

G

B

A Sleeve

B Heat insulating material

C Lagging

D Caulking material

E Band

F Waterproofing layer

G Sleeve with edge

Branch piping section

Outer wall		Outer wall (exposed)
C D	A B		EB
			I
Roof pipe shaft		Penetrating portion on fire limit and boundary wall
	G	I	J
	D
	B

H
F	A
	1m	1m

H Lagging material

I Mortar or other incombustible caulking

J Incombustible heat insulation material

When filling a gap with mortar, cover the penetration part with steel plate so that the insulation material will not be caved in. For this part, use incombustible materials for both insulation and covering. (Vinyl covering should not be used.)

Insulate the header using the insulation

material attached to the branch pipe kit

as shown in the figure.

22

11. Electrical work

11.1. Caution

1Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.

Warning:

Be sure to have authorized electric engineers do electric work using special circuits in accordance with regulations and this installation manual. If power supply circuit has a lack of capacity or electric work deficiency, if may cause an electric shock or fire.

2Install the outdoor unit transmission line away from the power source wiring so that it is not affected by electric noise from the power source. (Do not run it through the same conduit.)

3 Be sure to provide designated grounding work to outdoor unit.

Caution:

Be sure to put outdoor unit to earth. Do not connect earth line to any gas pipe, water pipe, lightning rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

4 Give some allowance to wiring for electrical part box of indoor and outdoor units, because the box is sometimes removed at the time of service work.

5Never connect the main power source to terminal block of transmission line. If connected, electrical parts will be burnt out ( mark in the figure below).

6	Use 2-core shield cable for transmission line. If transmission lines of different systems are wired with the same multiplecore cable, the resultant poor
	transmitting and receiving will cause erroneous operations (× mark in the figure below).	ENGLISH
8	In case to connect with the upper class controller or to conduct group operation in different refrigerant systems, the control line for transmission is
7	Only the transmission line specified should be connected to the terminal block for outdoor unit transmission.
	(Transmission line to be connected with indoor unit : Terminal block TB3 for transmission line, Other : Terminal block TB7 for centralized control)
	Erroneous connection does not allow the system to operate.
	required between the outdoor units each other.
	Connect this control line between the terminal blocks for centralized control. (2-wire line with no polarity)
	When conducting group operation in different refrigerant systems without connecting to the upper class controller, replace the insertion of the short
	circuit connector from CN41 of one outdoor unit to CN40.
9	Group is set by operating the remote controller.

	A
	C
TB3
TB7	B
	D
TB3
TB7	B

TB3: Transmission line terminal board, TB7: Central control line terminal board

A Outdoor unit

B 2-core cable

C Indoor unit

D Remote controller

E Multi-core cable

	A
	C
TB3
TB7	E
	D
TB3
TB7

23

ENGLISH

11.2.Control box and connecting position of wiring

1 Outdoor unit

1.Remove the total of six screws at the top and bottom, and remove the service panel by pulling it forward. (See the figure below.)

A

A Service panel

2.Remove the two screws on the left and right-hand of the base of the control box and pull the overall cover downwards to detach it. (A diagram with the control box cover removed is shown below.)

J

B

F

	LD1
	C D		A
	E
L1 L2 L3	N
TB1	M1 M2 M1		M2 S
	TB3	TB7
G	H	I	K

A INV board

B MAIN board

C Ten position

D One position

E Address switch

F FANCON board

G Power source

H Shield screw

I Transmission line

J RELAY board

K Shield terminal (S)

3.Connect indoor and outdoor units through the terminal block for transmission lines (TB3). Outdoor units and connections to central control systems go through the terminal block for centralized control (TB7).

When making an indoor/outdoor connection with shielded wiring, connect the shield ground to the shield screw. When making a central control system connection with shielded wiring, use the terminal block for centralized control (TB7).

When the CN41 power supply connector of an outdoor unit has been replaced with a CN40, the shield terminal (S) for centralized control

(TB7) should also be connected to the shield screw.

2 How to use the conduit mounting plate

(1)Conduit mounting plates (ø46, ø53, ø62) are being provided.

Select conduit mounting plate based on the outside diameter of conduit to be used and mount it as shown in the figure.

(2)Fix power source wiring to control box by using buffer bushing for tensile force (PG connection or the like).

A

B

C

D

E

					A	B
				force
				e
			il
Tensile
		s
	n
e						G
T

knockout hole knockout hole

FToopreventpreventexternalexternaltensiletensileforceforcefromfromapplyingapplyingtotothethewiringwiringconnectionconnection sectionsection off powerer sources rce terminalt r i l block,l k, use bufferffer bushingushing likelike PGPG connectionconnection oror thethe likelike..

A ø 46 mounting hole

B ø 53 mounting hole

C ø 62 knockout hole

D For the connection of conduit at bottom

E ø 62 mounting hole

F For the connection of conduit at front

G The front of outdoor unit

3 How to use the wire mounting plate

(1)When the power source and transmission lines are wired through the knock-out hole of the left wiring, it is necessary to attach the mounting plate onto the base of the front of the control box with two screws.

In this case, please use the top clamp to fasten the transmission line and the lower installation hole to fasten the power supply line.

If it does not match with the outer diameter of the power line conduit, mount the power line conduit mounting plate (ø 46) as shown in the figure below.

Also, please fasten it so that no tension is brought to bear on the power line, as shown above.

Controltr l Box

Øø 46 mountingti holele

TransmissionTransmission wirewire

SourceSourcewirewire Wireire mountingounting plateplate

FrontFrontsideside

øØ5353 mountingmountingholehole

24

4 Transmission booster (optional)

(For details, see item 11.3. “Wiring transmission cables”)

Connect 220/230/240 VAC to L/N of power terminal block (TB1).

Connect the ground to the terminal of power terminal block (TB1).

Connect the outdoor unit side transmission cables to A/B of transmission cables terminal block 1 (TB2). Connect the outdoor unit side shield to S of transmission cables terminal block 1 (TB2).

Connect additional indoor unit side transmission cables to A/B of transmission cables terminal block 2 (TB3).

Connect additional indoor unit side shield to S of transmission cables terminal block 2 (TB3).

PowerPower terminalt l blockblock(TB1)(TB1)

andandEarthEarth

UP

	cables
	Transmissionransmission cables
TRANSMISSION BOOSTER	terminalt i l blockl	2 (TB3)( )
MODEL PAC-SF46EPA
POWER RATING 220-240V:0.7A ~/N
	50
WEIGHT	3.4kg
	Transmission cables
	ransmission cables
	terminalt i l blockl	1 (TB2)( )

11.3. Wiring transmission cables

Wiring method, address setting method and permissible wiring length differ according to and whether or not you are using transmission booster. Check permissible wiring length before wiring.

A may be required depending on the number of indoor units.

Item 4 “Wiring examples” gives typical wiring examples (A – C).

A.System using remote controller (1 outdoor unit)

B.System using remote controller (system operated as a group among multiple refrigerant systems)

C.System using power supply extension unit for transmission booster (combination of systems a – b)

1 Connecting a transmission booster

A transmission booster (RP) is required when the number of connected indoor unit models in a cooling system exceeds the number of models specified in the chart below.

* The maximum number of units that can be controlled is determined by the indoor unit model, the type of remote controller and their capabilities.

					Remote controller type		Remote controller PAR-F 25MA
(*1)
Capability of the		Number of connected indoor units that can be					Prior to Ver. E		After Ver. F
connected indoor units		connected without a RP.
		200 or lower					16 (32)		20 (40)
		200 or higher					16 (32)		16 (32)
			The number of indoor units and the total number of remote controllers is displayed within the parenthesis ( ).
*1 If even one unit that is higher than 200 exists in the cooling system, the maximum capacity will be “200 or higher”.
2 Name, code and possible unit connections
		Name		Code		Possible unit connections
Outdoor unit	Outdoor unit controller			OC		–
Indoor unit	Indoor unit controller			IC		2 to 32 units per 1 OC (*1)
Remote controller	Remote controller (*1)			RC		2 units maximum per group
Other	Transmission booster unit			RP		0 to 1 unit per 1 OC (*1)

*1 A transmission booster (RP) may be required depending on the number of connected indoor unit controllers.

3 Types of control cables

(1) Wiring transmission cables

•Types of transmission cables

Shielding wire CVVS or CPEVS

•Cable diameter

More than 1.25 mm2

•Maximum wiring length within 200 m

(2) Remote control cables

	Kind of remote control cable	2-core cable (unshielded)
	Cable diameter	0.5 to 0.75 mm2
	Remarks	When 10 m is exceeded, use cable with the same
		specifications as (1) Transmission line wiring.

4 Wiring examples

Typical wiring examples are shown on pages 26 to 30 (Wiring examples A – C).

ENGLISH

25

ENGLISH

A. Example of a single-outdoor-unit system (Shielding wires and address setting are necessary)

Example of Wiring Control Cables

Wiring Method and Address Setting

1.

Standard Operation

L1

L2

a. Use feed wiring to connect terminals M1 and M2 on transmis-

sion cable block (TB3) for the outdoor unit (OC) to terminals

OC

M1 and M2 on the transmission cable block (TB5) of each

IC

IC

indoor unit (IC). Use non-polarized two wire.

To ground the shielded

wire, use cross-over wiring from the

(51)

ground terminal

on the outdoor unit and terminal S on the

(01)

(02)

indoor unit (TB5).

TB3

TB7

TB5

TB5

b. Connect terminals M1 and M2 on the transmission cable block

M1 M2

M1 M2S

M1 M2S

M1 M2S

(TB5) for each indoor unit with the terminal block (TB6) for the

L3

remote controller (RC).

c. Set the address setting switch as shown below.

* To set the outdoor unit address to 100, the outdoor address

2

r

setting switch must be set to 50.

r1

TB6

Unit

Range

Setting Method

Indoor Unit

01 to 50

—

• One remote controller for each in-

(102)

TB6

Use the most recent

RC

door unit.

Outdoor Unit

51 to 100

address of all the indoor

(101)

•

Inside ( ) Address: There is no

units plus 50

RC

need for setting the 100 position on

Remote Controller

101 to 150

Indoor unit address plus

the remote controller.

100

2. Operation Using Two Remote controllers

a. Same as above

OC

b. Same as above

IC

IC

c. Set the address switch as shown below.

(51)

* To set the outdoor unit address to 100, the outdoor address

setting switch must be set to 50.

(01)

(02)

TB3

TB7

TB5

TB5

Unit

Range

Setting Method

M1M2

M1 M2 S

M1M2S

M1M2S

Indoor Unit

01 to 50

—

Use the most recent

A Main Remote

Outdoor Unit

51 to 100

address of all the indoor

•

Using two remote

units plus 50

Controller

controllers

for

Main Remote Controller

101 to 150

Indoor unit address plus

(101)

(151)

(102)

(152)

B Sub Remote

each indoor unit.

100

TB6

TB6

TB6

TB6

Controller

Sub Remote Controller

151 to 200

Indoor unit address plus

A

B

A

B

150

RC

RC

RC

RC

3.

Group Operation

a. Same as above

OC

b. Connect terminals M1 and M2 on transmission cable terminal

IC A

IC B

block (TB5) of the IC main unit with the most recent address

(51)

within the same indoor unit (IC) group to terminal block (TB6)

on the remote controller.

(01)

(02)

c. Set the address setting switch as shown below.

TB3

TB7

TB5

TB5

* To set the outdoor unit address to 100, the outdoor address

M1M2

M1M2S

M1M2S

M1M2S

setting switch must be set to 50.

Unit

Range

Setting Method

Use the most recent ad-

IC (Main)

01 to 50

dress within the same group

TB6

of indoor units

Use an address, other than

(101)

that of the IC (Main) from

RC

among the units within the

IC (Sub)

01 to 50

same group of indoor units

This must be in sequence

with the IC (Main)

• Operating multiple indoor units

Outdoor Unit

51 to 100

Use the most recent ad-

using one remote controller.

dress of all the indoor units

plus 50

Main Remote

101 to 150

Set at an IC (Main) address

within the same group plus

Controller

100

A Main

Sub Remote

Set at an IC (Main) address

B Sub

151 to 200

within the same group plus

Controller

150

d. Use the indoor unit (IC) within the group with the most func-

tions as the IC (Main) unit.

Combinations of 1 through 3 above are possible.

26

Permissible Lengths

Prohibited Items

Longest Transmission Cable Length (1.25 mm2)

L1 + L2, L2 + L3, L3 + L1 = 200 m

Remote Controller Cable Length

1If 0.5 to 0.75 mm2 r1 , r2 = 10 m

2If the length exceeds 10 m, the exceeding section should be 1.25 mm2 and that section should be a value within the total extension length of the transmission cable and maximum transmission cable length (L3).

Same as above	OC							• Use the indoor unit
								(IC) address plus 150
				IC		IC		as the sub remote
	(51)							controller address. In
				(01)		(02)		this case, it is 152.
	TB3	TB7		TB5		TB5		• Three or more remote
	M1M2	M1 M2 S		M1M2 S		M1M2 S		controllers (RC)
								cannot be connected
								to one indoor unit.
			TB6	TB6	TB6	TB6	TB6
			(101)	(151)	(102)	(103)	(104)
			RC	RC	RC	RC	RC	A Main
			A	B	A	B		B Sub
Same as above
		OC
					IC A	IC B
		(51)
					(01)	(02)
		TB3	TB7	TB5		TB5
		M1M2	A B S	M1M2S		M1M2S

TB6

(102)

RC

• The remote controller address is the indoor unit main address plus 100. In this case, it is 101.

A Main

B Sub

Note:

1.If there is one or more 200 or higher indoor units within the same cooling system, and the number of indoor units exceeds 16 units, a transmission booster is necessary (when a “PAR-F25MA Ver. F” or subsequent version of remote control is used).

2.If there is not even one 200 or higher indoor unit within the same cooling system, and the number of indoor units exceeds 20 units, a transmission booster is necessary (when a “PAR-F25MA Ver. F” or subsequent version of remote control is used).

* For details, see wire connection example C.

ENGLISH

27

ENGLISH

B. Example of a group operation system with multiple outdoor units (Shielding wires and address setting are necessary)

					L1	L2	L3	L4
			OC		A	B		C
			CN40		IC	IC	IC	IC
			(51)
					(01)	(04)	(05)	(06)
			TB3		TB5	TB5	TB5	TB5
			M1M2	M1M2 S	M1M2 S	M1M2 S	M1M2 S	M1M2 S
				TB7
wiring					r1		r2
							r3
line			D
transmission		L9						E
					TB6		TB6
								TB6
					(101)		(105)	(155)
					RC		RC	RC
					L5	L6	L7
of			OC
Example					(02)	(03)	(07)
					IC	IC	IC
			(52)
			TB3		TB5	TB5	TB5
			M1M2	M1M2 S	M1M2 S	M1M2 S	M1M2 S
				TB7
						L8
		A Group 1
		B Group 3				4
		C Group 5				r
		D Shielded Wire				TB6
		E Sub Remote Controller
						(103)
(	)	Address				RC

		a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-
			IC wiring intervals.
		b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor
			unit (OC) to terminals M1, M2 and terminal S on the transmission cable block of the indoor unit (IC).
	method	c.	Connect terminals M1 and M2 on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the
		e. On one outdoor unit only, change the jumper connector on the control panel from CN41 to CN40.
			same group to the terminal block (TB6) on the remote controller (RC).
	setting	d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor unit (OC).
		f. Connect the terminal S on the terminal block for central control (TB7) for the outdoor unit (OC) for the unit into which the jumper connector
			was inserted into CN40 in Step above to the ground terminal in the electrical component box.
	address	g. Set the address setting switch as follows.
			Unit	Range	Setting Method
		* To set the outdoor unit address to 100, the outdoor address setting switch must be set to 50.
	method,
			IC (Main)	01 to 50	Use the most recent address within the same group of indoor units
					Use an address, other than that of the IC (Main) from among the units within the same group of
	Wiring		IC (Sub)	01 to 50	indoor units
			Outdoor Unit	51 to 100	Use the most recent address of all the indoor units plus 50
					This must be in sequence with the IC (Main)
			Main Remote Controller	101 to 150	Set at an IC (Main) address within the same group plus 100
			Sub Remote Controller	151 to 200	Set at an IC (Main) address within the same group plus 150

h.The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been turned on.

28

Permissible Lengths

Prohibited Items

•Max length via outdoor units: L1+L2+L3+L4+L5+L6+L7+L9,

L1+L2+L3+L4+L5+L6+L8+L9 = 500 m (1.25 mm2)

•Max transmission cable length: L1+L2+L3+L4, L5+L6+L7, L5+L6+L8, L7+L8 = 200 m (1.25 mm2)

•Remote controller wire length: r1, r2, r3, r4 = 10 m (0.5 to 0.75 mm2)

If the length exceeds 10 m, use a 1.25 mm2 shielded wire. The length of this section (L8) should be included in the calculation of the maximum length and overall length.

OC		A	B		C
CN40		IC	IC	IC	IC
(51)
		(01)	(04)	(05)	(06)
TB3		TB5	TB5	TB5	TB5
M1M2	M1M2 S	M1M2 S	M1M2 S	M1M2 S	M1M2 S
	TB7
D					ENGLISH
		TB6		TB6	TB6
		(101)		(105)	(155)
		RC		RC	RC
		E
OC
		IC	IC	IC
(52)
		(02)	(03)	(07)
TB3		TB5	TB5	TB5
M1M2	M1M2 S	M1M2 S	M1M2 S	M1M2 S
	TB7
			TB6
			(103)
			RC

A Group 1

B Group 3

C Group 5

D Shielded Wire

E Remote Controller

• The terminal S on the terminal block (TB7) for the central control panel should be connected to the ground terminal	of the electric
components box of the only outdoor unit installed with the CN40 into which the jumper connector was inserted.

•Never connect together the terminal blocks (TB5) for transmission wires for indoor units (IC) that have been connected to different outdoor units (OC).

•Set all addresses to ensure that they are not overlapped.

Note:

1.If there is one or more 200 or higher indoor units within the same cooling system, and the number of indoor units exceeds 16 units, a transmission booster is necessary (when a “PAR-F25MA Ver. F” or subsequent version of remote control is used).

2.If there is not even one 200 or higher indoor unit within the same cooling system, and the number of indoor units exceeds 20 units, a transmission booster is necessary (when a “PAR-F25MA Ver. F” or subsequent version of remote control is used).

* For details, see wire connection example C.

29

ENGLISH

C. Example of a system using the transmission booster (Combination of systems A and B)

L1

L2

L3

L5

L6

OC

Ground

wiring

IC

IC

RP

IC

IC

line

TB2

TB3

A B S

A B S

transmissionof

TB3

TB5

TB13

L4

TB13

L7

TB13

TB5

TB13

TB5

TB5

M1M2

M1M2 S

1

2

3

M1M2 S

1 2

3

M1M2 S

1

2

3

M1M2 S

1

2

3

Example

r1

r1

TB6

TB6

RC

RC

N1

N2

	a. Address settings are the same as for wiring connection examples A and B.
	b. Let the number of indoor units and remote control units connected be within the limit for the number of units shown in the following table for
method	the total of the number of units connected between the outdoor unit (OC) and the transmission booster (RP) N1 and the number of units
	connected after the transmission booster (RP) N2.
	c. Connect the power supply ground to the transmission booster (RP) securely.
setting	Connect the transmission lines of the outdoor unit side to terminals A and B of transmission line terminal block 1 (TB2) of the transmission
	booster (RP).
address	Connect the transmission lines of the expansion indoor unit side to terminals A and B of the of transmission line terminal block 2 (TB3) of the
	transmission booster (RP).
method,	connected indoor units	Remote controller type	Remote controller PAR-F 25MA
		connected without a RP.
	(*1)
Wiring	Capability of the	Number of connected indoor units that can be	Prior to Ver. E	After Ver. F
		200 or higher	16 (32)	16 (32)
		200 or lower	16 (32)	20 (40)
		The number of indoor units and the total number of remote controllers is displayed within the parenthesis ( ).

*1 If even one unit that is higher than 200 exists in the cooling system, the maximum capacity will be “200 or higher”.

length

•

Indoor system maximum remote wiring length: 1 L1+L2+L3+L5+L6 = 200 m (1.25 mm2)

3 L1+L2+L4

= 200 m (1.25 mm2)

Permissible

2 L1+L2+L3+L5+L7 = 200 m (1.25 mm2)

4 L6+L5+L3+L4, L4+L3+L5+L7 =

200 m (1.25 mm2)

•

Remote control wiring length: r1, r2

= 10 m (0.5 to 0.75 mm2)

If the length exceeds 10 m, use 1.25 mm2 shielded cable and calculate the length of that portion (L4 and L7)

as within the total extended length and the longest remote length.

OC

Ground

IC

IC

RP

IC

IC

TB2

TB3

A B S

A B S

TB3

TB5

TB13

TB5

TB13

TB5

TB13

TB5

TB13

Prohibiteditems

M1M2

M1M2 S

1 2

3

M1M2 S

1 2

3

M1M2 S

1 2 3

M1M2 S

1 2 3

TB6

TB6

RC

RC

•Do not mistake the connection locations of transmission booster (RP) transmission line terminal block 1 (TB2) and transmission line terminal block 2 (TB3). (Operation will not be normal in such a case.)

•Do not connect the S terminals of transmission line terminal block 1 (TB2) and transmission line terminal block 2 (TB3) of the transmission booster (RP) together.

30