Toshiba MMY-MAP1446FT9P-UL, MMY-MAP0726FT9P-UL, MMY-MAP1686FT9P-UL, MMY-MAP0966FT9P-UL, MMY-MAP1206FT9P-UL User Manual

AIR CONDITIONER (MULTI TYPE)

Installation Manual

Outdoor Unit

Model name:

<Heat Recovery Model>

MMY-MAP0726FT9P-UL MMY-MAP0966FT9P-UL MMY-MAP1206FT9P-UL MMY-MAP1446FT9P-UL MMY-MAP1686FT9P-UL

For OUTDOOR USE only

Pour une UTILISATION EN EXTÉRIEUR uniquement

1122001101

Installation Manual	1	English
Manuel d’installation	32	Français

ADOPTION OF NEW REFRIGERANT

This Air Conditioner uses R410A an environmentally friendly refrigerant.

Contents

1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Installation of R410 air conditioner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 Selection of installation place. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5 Carrying in the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6 Installation of the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 Refrigerant piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8 Electric wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 9 Address setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 10 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

– 1 –

Installing, starting up, and servicing air conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start up, and service this equipment. Untrained personnel can perform basic maintenance functions such as indoor unit air filter. All other operations should be performed by trained service personnel.

Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety information. This is the safety alert symbol . When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and CAUTION. These words are used with the safety alert symbol.

DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

1-EN

2-EN

1 Precautions for safety

The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.

WARNING

General

•Carefully read Owner’s Manual before starting the air conditioner. There are many important things to keep in mind for daily operation.

•Ask for installation to be performed by the dealer or a professional. Only a qualified installer is able to install an air conditioner. If a non-qualified person installs an air conditioner, it may result in problems such as fire, electric shock, injury, water leakage, noise and vibration.

•Do not use any refrigerant different from the one specified for complement or replacement.

Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.

•Before opening the service panel of the outdoor unit, set the circuit breaker to the OFF position. Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with the interior parts.

•Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breakers for both the indoor and outdoor units to the OFF position. Otherwise, electric shock may result.

•Wear protective gloves and safety work clothing during installation, servicing and removal.

•Do not touch the aluminium fin of the outdoor unit. You may injure yourself if you do so. If the fin must be touched for some reason, first put on protective gloves and safety work clothing, and then proceed.

•Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor unit and result in injury.

•Before cleaning the filter or other parts of the outdoor unit, set the circuit breaker to OFF without fail, and place a “Work in progress” sign near the circuit breaker before proceeding with the work.

•The refrigerant used by this air conditioner is the R410A.

•The air conditioner must be transported in stable condition. If any part of the product are broken, contact your distributor.

Selection of installation location

•Do not install in a location where flammable gas leaks are possible. If the gas should leak and accumulate around the unit, it may ignite and cause a fire.

•During transporting the air conditioner, wear shoes with protective toe caps, protective gloves, and other protective clothing.

•To transport the air conditioner, do not take hold of the bands around the packing carton. You may injure yourself if the bands should break.

•Places where the operation sound of the outdoor unit may cause a disturbance. (Especially at the boundary line with a neighbour, install the air conditioner while considering the noise.)

Installation

•The designated bolts (M12) and nuts (M12) for securing the outdoor unit must be used when installing the unit.

•Install the outdoor unit property in a location that is durable enough to support the weight of the outdoor unit. Insufficient durability may cause the outdoor unit to fall, which may result in injury.

•Install the unit in the prescribed manner for protection against strong wind and earthquake. Incorrect installation may result in the unit falling down, or other accidents.

•Fix the screws back which have been removed for installation or other purposes.

Refrigerant piping

•Install the refrigerant pipe securely during the installation work before operating the air conditioner. If the compressor is operated with the valve open and without refrigerant pipe, the compressor sucks air and the refrigeration cycles is over pressurized, which may cause a injury.

•Tighten the flare nut with a torque wrench in the specified manner. Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may result in refrigerant leakage.

•Ventilate the air if the refrigerant gas leaks during installation. If the leaked refrigerant gas comes into contact with fire, toxic gas may be produced.

•When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge the air completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge the air completely may cause the air conditioner to malfunction.

•Nitrogen gas must be used for the airtight test.

Electrical wiring

•Only a certified installer or qualified service person is allowed to carry out the electrical work of the air conditioner.

•When connecting the electrical wires, repairing the electrical parts or undertaking other electrical jobs, wear gloves to provide protection for electricians and from heat, insulating shoes and clothing to provide protection from electric shocks. Failure to wear this protective gear may result in electric shocks.

•When executing address setting, test run, or troubleshooting through the checking window on the electric parts box, put on insulated heat-proof gloves, insulated shoes and other clothing to provide protection from electric shock. Otherwise you may receive an electric shock.

•Use wiring that meets the specifications in the Installation Manual, NEC and the local codes.

•Check that the product is properly grounded.

•Do not connect the ground line to a gas pipe, water pipe, lightning conductor, or a telephone ground line.

•After completing the repair or relocation work, check that the ground wires are connected properly.

•Install a circuit breaker that meets the specifications in the installation manual, NEC and local codes.

•Under no circumstances must the power cable be extended. Connection trouble in the places where the cable is extended may give rise to smoking and/or a fire.

•Do not supply power from the power terminal block equipped on the outdoor unit to another outdoor unit. Capacity overflow may occur on the terminal block and may result in fire.

•Each outdoor unit should have its own power supply.

Test run

•Before operating the air conditioner after having completed the work, check that the electrical parts box cover of the indoor unit and service panel of the outdoor unit are closed, and set the circuit breaker to the ON position. You may receive an electric shock if the power is turned on without first conducting these checks.

•If there is any kind of trouble (such as when a check code display has appeared, there is a smell of burning, abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person.

Take steps to ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until qualified service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical problems to escalate or result in electric shocks or other failure.

•Upon completion of the installation work, check for refrigerant leaks and check the insulation resistance and water drainage. Then conduct a test run to check that the air conditioner is operating properly.

Explanations given to user

•Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does not know where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has occurred in the air conditioner.

•If the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position, and contact a qualified service person to have the repairs done. Do not set the circuit breaker to the ON position until the repairs are completed.

•After the installation work, follow the Owner’s Manual to explain to the customer how to use and maintain the unit.

Relocation

•Only a certified installer or service person is allowed to relocate the air conditioner.

•When the pump-down work is carried out shut down the compressor before disconnecting the refrigerant pipe. Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air or other gas to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in rupture, injury or other trouble.

•Do not recover the refrigerant into the outdoor unit. Use a refrigerant recovery machine to recover the refrigerant after moving or repairing. It is impossible to recover the refrigerant into the outdoor unit. Refrigerant recovery into the outdoor unit may result in serious accidents such as explosion of the unit, injury or other accidents.

CAUTION

New Refrigerant Air Conditioner Installation

•THIS AIR CONDITIONER USES THE ENVIRONMENTALLY FRIENDLY HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER.

•The characteristics of R410A refrigerant are; easy to absorb water, oxidizing membrane or oil, and its pressure is approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also been changed.

Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle.

•To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of the main unit and installation tools are changed from those for the conventional refrigerant.

•For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not enter.

EN

FR

3-EN	– 2 –	4-EN

	2	Accessory parts
	Part name				Q’ty			Shape	Usage
			MAP072	MAP096	MAP120	MAP144	MAP168
	Owner’s Manual		1	1	1	1	1	–	(Be sure to hand it to the
									customers.)
	Installation Manual		1	1	1	1	1	–	This manual for installer.
	Attached pipe								Suction-side gas pipe
	(Ø7/8" both forward		1	1	–	–	–
									Ø1"→Ø7/8" pipe fitting
	and downward)
	Attached pipe								Suction-side gas pipe
	(Ø1 1/8" both forward		–	–	1	1	1
									Ø1"→Ø1 1/8" pipe fitting
	and downward)
	Attached pipe								Discharge-side gas pipe
									Ø5/8"→Ø3/4" pipe fitting
	(Ø3/4" both forward		1	–	–	–	–
									* Flare the connector on the
	and downward)
									outdoor unit for installation.
	Attached pipe								Discharge-side gas pipe
	(Ø3/4" both forward		–	1	1	–	–		* Flare the connector on the
	and downward)								outdoor unit for installation.
	Attached pipe								Discharge-side gas pipe
									Ø3/4"→Ø7/8" pipe fitting
	(Ø7/8" both forward		–	–	–	1	1
									* Flare the connector on the
	and downward)
									outdoor unit for installation.
	Attached pipe
	(Ø1/2" for draw-out		1	1	1	–	–		Liquid pipe
	forward)
									* Flare the connector on the
	Attached pipe								outdoor unit for installation.
	(Ø1/2" for draw-out		1	1	1	–	–
	downward)
	Attached pipe
	(Ø5/8" for draw-out		–	–	–	1	–		Liquid pipe
	forward)
									* Flare the connector on the
	Attached pipe								outdoor unit for installation.
	(Ø5/8" for draw-out		–	–	–	1	–
	downward)
	Attached pipe
	(Ø3/4" for draw-out		–	–	–	–	1		Liquid pipe
	forward)								Ø5/8"→Ø3/4" pipe fitting
	Attached pipe								* Flare the connector on the
			–	–	–	–	1		outdoor unit for installation.
	(Ø3/4" for draw-out
	downward)

– 3 –

3 Installation of R410 air conditioner

This air conditioner adopts the HFC refrigerant (R410A) which does not deplete the ozone layer.

•R410A refrigerant is vulnerable to impurities such as water, oxidizing membranes, or oils because the pressure of R410A refrigerant is higher than that of the former refrigerant by approximately 1.6 times.

As well as the adoption of the new refrigerant, the refrigerating oil has been also changed. Therefore, pay attention so that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle of the new refrigerant air conditioner during installation.

•To prevent mixing of refrigerant or refrigerating oil, the size of the charge port of the main unit or connecting section of the installation tool differs to that of an air conditioner for the former refrigerant.

Accordingly, exclusive tools are required for the new refrigerant (R410A) as shown below.

•For connecting pipes, use new and clean piping materials so that water or dust does not enter.

■ Required Tools and Cautions on handling

Prepare the tools and equipment listed in the following table before starting the installation work. : R410A exclusive

: Generic

Tools/equipment	Use
Manifold gauge*	Vacuuming/charging refrigerant
Charging hose	and operation check
Gas leak detector	Gas leak check
Vacuum pump with backflow	Vacuum drying
prevention function
Flare tool	Flare machining of pipes	Usable if dimensions are adjusted.
Bender	Bending pipes
Refrigerant recovery equipment	Refrigerant recovery
Torque wrench	Tightening flare nuts	Ø1/2" (12.7 mm) and Ø5/8" (15.9 mm)
Pipe cutter	Cutting pipes
Brazing torch and nitrogen	Braze pipes
cylinder
Refrigerant charging scales	Charging refrigerant
4 mm hexagon wrench	Opening liquid valve

5-EN

6-EN

4 Selection of installation place

Upon customer’s approval, install the air conditioner in a place which satisfies the following conditions:

•Place where it can be installed horizontally.

•Place which can reserve a sufficient service space for safe maintenance or checks.

•Place where there is no problem even if the drained water overflows.

Avoid the following places:

•Salty places (seaside area) or places with much gas sulfide (hot spring area) (If selecting such a place, special maintenance is required.)

•Places where oil (including machine oil), steam, oil smoke or corrosive gas is generated.

•Places where an organic solvent is used.

•Chemical plants with a cooling system using liquid carbon dioxide.

•Places where a device generating high frequency (inverter, non-utility generator, medical apparatus, or communication equipment) is set. (Malfunction or abnormal control of the air conditioner, or interference to devices listed above may occur.)

•Places where discharged air from the outdoor unit blows against the windows of a neighbour’s house.

•Places unable to bear the weight of the unit.

•Places with poor ventilation.

•The unit will operate down to an outdoor temperature of 13 °F, however considerable performance decrease will be expected below 5 °F. Therefore please consider installation location/surroundings and system design when expected to operate between 5 °F and 13 °F.

■ Installation space

Unit: in (mm)

Leave space necessary for running, installation and servicing.

Air discharge

Air intake

Air intake

Air intake

Air intake

Installation/servicing surface

Square hole for handling

(Rear side)	Outdoor unit top view

19.7" (500)
or more
0.4" (10) or more			0.4" (10)
19.7" (500)			or more
or more	L	L	31.5" (800)
(Front side)
			or less

L Recommendation 7.9" (200mm),

at least 0.8" (20mm) or more.

0.4" (10) or more

L

L

NOTE

•If there is an obstacle above the outdoor unit, leave a space of 78.7" (2000) or more to the top end of the outdoor unit.

•If there is a wall around the outdoor unit, make sure that its height does not exceed 31.5" (800).

EN

FR

7-EN	– 4 –	8-EN

– 5 –

▼Combination of outdoor units

Model name	Unit 1	Unit 2	Unit 3
(Standard Model)	Header unit	Follower unit	Follower unit
MMY-MAP0726FT9P-UL	MMY-MAP0726*	–	–
MMY-MAP0966FT9P-UL	MMY-MAP0966*	–	–
MMY-MAP1206FT9P-UL	MMY-MAP1206*	–	–
MMY-MAP1446FT9P-UL	MMY-MAP1446*	–	–
MMY-MAP1686FT9P-UL	MMY-MAP1686*	–	–
MMY-AP1926FT9P-UL	MMY-MAP0966*	MMY-MAP0966*	–
MMY-AP2166FT9P-UL	MMY-MAP1206*	MMY-MAP0966*	–
MMY-AP2406FT9P-UL	MMY-MAP1446*	MMY-MAP0966*	–
MMY-AP2646FT9P-UL	MMY-MAP1446*	MMY-MAP1206*	–
MMY-AP2886FT9P-UL	MMY-MAP1446*	MMY-MAP1446*	–
MMY-AP3126FT9P-UL	MMY-MAP1686*	MMY-MAP1446*	–
MMY-AP3366FT9P-UL	MMY-MAP1206*	MMY-MAP1206*	MMY-MAP0966*
MMY-AP3606FT9P-UL	MMY-MAP1206*	MMY-MAP1206*	MMY-MAP1206*
MMY-AP3846FT9P-UL	MMY-MAP1446*	MMY-MAP1206*	MMY-MAP1206*
MMY-AP4086FT9P-UL	MMY-MAP1446*	MMY-MAP1446*	MMY-MAP1206*
MMY-AP4326FT9P-UL	MMY-MAP1446*	MMY-MAP1446*	MMY-MAP1446*
MMY-AP4566FT9P-UL	MMY-MAP1686*	MMY-MAP1446*	MMY-MAP1446*

Model name	Unit 1	Unit 2	Unit 3
(Space Saving Model)	Header unit	Follower unit	Follower unit
MMY-AP192S6FT9P-UL	MMY-MAP1206*	MMY-MAP0726*	–
MMY-AP240S6FT9P-UL	MMY-MAP1206*	MMY-MAP1206*	–
MMY-AP288S6FT9P-UL	MMY-MAP1686*	MMY-MAP1206*	–
MMY-AP336S6FT9P-UL	MMY-MAP1686*	MMY-MAP1686*	–

5 Carrying in the outdoor unit

CAUTION

Handle the outdoor unit carefully, observing the following items.

•To use a forklift or other machinery for loading/unloading in transportation, insert the fork of the forklift into the rectangular holes for handling as shown below.

•To lift up the unit, insert a rope capable of bearing the weight of the unit into the rectangular holes shown below. Tie the unit from 4 sides.

(Apply padding in positions where the rope comes in contact with the outdoor unit so that no damage is caused to the outer surface of the outdoor unit.)

(There are reinforcing plates on the side surfaces, so the rope cannot be passed through.)

	Correct		Incorrect	Incorrect
		Plaster
		board
		Rope
Rectangular	Side	Plaster
holes for		board
handling
Front/Back	Incorrect
		Rectangular	Reinforcing
		holes for
Correct			plate
		lifting

Fork of the forklift

■ Weight center and weight

Unit: in (mm)

Weight center of an outdoor unit

(A)	Anchor bolt position	(B)	Anchor bolt position	(C)	Anchor bolt position
	27.6" (700)		36.2" (920)		51.6" (1310)

Anchor bolt position

29.7" (755)

Y Anchor bolt position

29.7" (755)

Y Anchor bolt position

29.7" (755)

Y

	X
Z	Z

X

Z

X

	No.	Model type	X	Y	Z	Weight
			(in(mm))	(in(mm))	(in(mm))	(lb(kg))
	(A)	MAP0726FT9P-UL	20.5" (520)	15.4" (390)	24.0" (610)	600 (272)
	(B)	MAP0966FT9P-UL	23.8" (605)	15.7" (400)	23.2" (590)	721 (327)
		MAP1206FT9P-UL
	(C)	MAP1446FT9P-UL	30.3" (770)	16.3" (415)	22.4" (570)	882 (400)
		MAP1686FT9P-UL

9-EN

10-EN

6 Installation of the outdoor unit

WARNING

Install the outdoor unit securely in a location where the base can sustain the weight adequately.

If strength is insufficient, the unit may fall down resulting in human injury.

CAUTION

•Drain water is discharged from the outdoor unit. (Especially while heating) Install the outdoor unit in a place with good drainage.

•For installation, be careful of the strength and level of the foundation so that abnormal sounds (vibration or noise) are not generated.

REQUIREMENT

Installation in a snowfall area

1.Install the outdoor unit on a higher foundation than the snowfall or set up a stand to install the unit so that snowfall will not affect the unit.

•Set up a stand higher than the snowfall.

•Apply an angled structure to the stand so that drainage will not be prevented. (Avoid using a stand with a flat surface.)

2.Mount a snowfall-hood onto the air inlet and the air outlet.

•Leave enough space for the snowfall-hood so that it will not be an obstacle for the air inlet and the air outlet.

Snowfall-hood for air outlet (locally procured)

Snowfall-hood for air

outlet

(4 faces)

(locally procured)

Stand

(locally procured)

1.To install multiple outdoor units, arrange them with 7.9" (200mm) (recommendation, at least 0.8" (20mm)) or more spaces in between.

Fix each outdoor unit with M12 anchor bolts at 4 positions. 0.8" (20mm) projection is appropriate for an anchor bolt.

Unit: in (mm)

L L

• Anchor bolt positions are as shown below:

Continuous hole	A	L+11.4" (290)	A	L+11.4" (290)	A	C*
(0.6" × 0.8" (15 × 20)						A
long hole)
					29.7" (755)	31.1" (790)

B

L

B

L

B

B

*Only MAP144, MAP168 type has holes for additional strength.

	Model type	A	B	C	L
	MAP0726	27.6" (700)	39.0" (990)	–	Recommendation 7.9" (200),
	MAP0966, MAP1206	36.2" (920)	47.6" (1210)	–
					at least 0.8" (20) or more
	MAP1446, MAP1686	51.6" (1310)	63.0" (1600)	59.0" (1500)

2. To draw out the refrigerant pipe from the underside,	3. Do not use 4 stands on the corner to support the
set the height of the stand to 19.7" (500mm) or more.	outdoor unit.
19.7" (500mm) or more	Incorrect	Correct

4. If vibration-proof rubbers (including vibration-proof blocks) are used, fit them under the whole clamping legs.

Correct		Correct
Anchor bolt	Install the vibration-proof
Vibration-proof rubber	rubber so that the bend part
	of the fixing leg is
	grounded.
Incorrect	Incorrect	Incorrect

0.8" (20)

M12 anchor bolt

4 positions/unit

L Recommendation 7.9" (200mm), at least 0.8" (20mm) or more.

11-EN

The bend part of the fixing leg is not grounded.

5. Be careful of the connecting arrangement of the header unit and follower units. Set the outdoor units in order of											EN
capacity from the one with the largest capacity. (A (Header unit) ≥ B ≥ C)

• Be sure to use a header unit for the leading outdoor unit to be connected to the main pipe. (Figure 1, 3 and 6)

• Be sure to use a T-shaped branch joint (RBM-BT14FUL/RBM-BT24FUL: separately purchased) to connect each FR outdoor unit.

• Be careful of the direction of the outdoor unit connection piping kit for the liquid side. (As shown in Figure 2, an outdoor unit connection piping kit cannot be attached so that the refrigerant of the main pipe flows directly into

the header unit.)

12-EN

– 6 –

Discharge side gas piping / Liquid piping

▼Figure 1			▼Figure 2
Correct			Incorrect
Header unit			Header unit
A	Follower unit		A	Follower unit
	B	Follower unit		B	Follower unit
		C			C

Main pipe

To the indoor unit

Suction side gas piping

▼Figure 3

Correct

Header unit

A Follower unit

B Follower unit

C

Incorrect

Main pipe

To the indoor unit

[Inverse connection of a gas-side branch unit]

▼Figure 4

Incorrect

Header unit

A Follower unit

B Follower unit

C

– 7 –

When drawing pipes downward

▼Figure 5

Incorrect

Header unit

AFollower unit B

	A view
	Suction gas joint
Main	Unit
pipe
To
the
indoor
unit	Vertical line
Suction gas joint	A

[Vertical connection of branch units]

▼Figure 6		▼Figure 7
Correct		Incorrect
	Header unit
	A	Follower unit

BFollower unit C

Main		pipe			Main
To	the			To			pipe
		indoor
					the
			unit			indoor
							unit
				Branch
				unit			To gas-side branch unit

•When attaching a Y-shaped branch unit for the outdoor unit connection piping kit, attach it level with the ground (Be sure not to exceed ±15 degrees.). Regarding a T-shape branch joints for the liquid side, there is no restriction for its angle.

At a level position

	(Horizontal line)	(Horizontal line)
A	Within ±15 degrees
	(A arrow view)	(B arrow view)
	B

•In case of using the Y-shaped branching joint for connecting between outdoor units (Discharge gas joint and Suction gas joint), please keep the straight part of at least 19.7" (500mm) at the inlet.

	Within ±15		Do not connect
			a branch unit
	degrees
			vertically.
		.7"
	19
	(500mm)
	or	more

13-EN

L-
shaped
pipe
To
gas-
	side
	branch
	unit

To gas-side	To gas-side
branch unit	branch unit

14-EN

7 Refrigerant piping

WARNING

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

If the leaked refrigerant gas comes into contact with fire, noxious gas may be generated.

•After installation, check that the refrigerant gas does not leak.

If the refrigerant gas leaks into the room and comes into contact with fire such as a fan heater, stove, or kitchen range, noxious gas may be generated.

■ Connection of refrigerant pipe

•The service valves are inside the outdoor unit. To access them, remove the front panel and the piping/ wiring panel. (M5: 9 pcs.)

•As shown in the illustration on the right, the hooks are at the right and left sides of the front panel. Lift up and remove the front panel.

•Pipes can be drawn out forward or downward from the outdoor unit.

•To draw out the pipe forward, draw it out to the outside via the piping/wiring panel, and leave a space of 19.7" (500mm) or more from the main pipe connecting the outdoor unit with the indoor unit, considering service work or other work on the unit. (For replacing the compressor, 19.7" (500mm)

or more space is required.)

•To draw out the pipe downward, remove the knockouts on the base plate of the outdoor unit, draw the pipes out of the outdoor unit, and perform piping on pipe should be 16.4 ft (5m) or less.

	19	.7"
		or

	(500mm)	(Left	(Right
	more	piping)
			piping)
	Drawing out
		forward

Hook

Front panel Piping/wiring panel

(Rear piping)

(Left piping)	Drawing out	(Right piping)
	downward

the right/left or rear side. Downward length of the balance

(MAP072)

Packed valve of liquid side

Ball valve of suction gas side

Packed valve of

balance pipe

Ball valve of

discharge gas pipe

(MAP096, 120)

Packed valve of liquid side

Ball valve of suction gas side

Packed valve of

balance pipe

Ball valve of

discharge gas pipe

(MAP144, 168)

Packed valve of liquid side Ball valve of suction gas side

Packed valve of balance pipe

Ball valve of discharge gas pipe

REQUIREMENT

•For a brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the inside of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.

•Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust does not contaminate the refrigerant.

•Be sure to use two spanners to loosen or tighten the flare nut. If a single spanner is used, the required level of tightening cannot be obtained. Tighten the flare nut with the specified torque. (If it is hard to loosen or tighten the flare nut of the balance pipe or packed valve of the liquid side with two spanners, loosen or tighten the flare nut while holding the valve mounting plate with a spanner.)

		Unit: ft•lbs (N•m)
	Outer dia. of	Tightening torque
	copper pipe
	Ø1/4 (6.4 mm)	10 to 13 (14 to 18)
	Ø3/8 (9.5 mm)	24 to 31 (33 to 42)
	Ø1/2 (12.7 mm)	37 to 46 (50 to 62)
	Ø5/8 (15.9 mm)	50 to 60 (68 to 82)
	Ø3/4 (19.1 mm)	74 to 88 (100 to 120)

Do not apply refrigerating oil to the surface of the flare.

Ball valve of discharge gas side

Do not clamp the service port

with two spanners, doing so may damage the service port.

Pipe connection method (Example)

		Draw-out forward			Draw-out downward
	Suction-side gas	Cut the L-shaped pipe, then braze the		Suction-side gas	Cut the L-shaped pipe, then braze the
	pipe	socket procured locally.		pipe	socket procured locally.
	Discharge-side	Braze the supplied attachment pipe		Discharge-side	Braze the supplied attachment pipe
	gas pipe	and elbow procured locally.		gas pipe	and socket procured locally.
	Liquid pipe	Braze the supplied attachment pipe		Liquid pipe	Braze the supplied attachment pipe
		and socket procured locally.			and socket procured locally.
	Discharge-side			Discharge-side			Suction-side	Suction-side
				gas pipe
	gas pipe	Suction-side	Suction-side
		gas pipe	gas pipe	Liquid pipe			gas pipe	gas pipe
	Liquid pipe	Balance					Balance
		pipe					pipe	Section
		L-shaped
			Section					to be cut
		pipe
			to be cut				Pipe
		Pipe		Attachment
	Attachment						L-shaped
				pipe
	pipe	Socket		Attachment			pipe
	Attachment	Pipe		pipe			Socket
	pipe						Pipe
	Elbow			Socket
	Socket	Pipe Pipe				Pipe	Socket
					Pipe

EN

FR

15-EN	– 8 –	16-EN

Extruding margin of copper pipe with flare machining: B (Unit: in (mm))

Copper pipe outer	When using R410A	When using
dia.	tool	conventional tool
3/8" (9.5)
1/2"(12.7)	0 - 0.02"	0.04" - 0.06"
5/8" (15.9)	(0 - 0.5)	(1.0 - 1.5)
3/4" (19.1)

Extruding margin of copper pipe with flare tools: A (Unit: in (mm))

Copper pipe outer	A +0–0.02" (–0.4)
dia.
3/8" (9.5)	0.52" (13.2)
1/2"(12.7)	0.65" (16.6)
5/8" (15.9)	0.78" (19.7)
3/4" (19.1)	0.94" (24.0)

*When using the conventional flare tool, to connect R410A pipes with flaring, make a margin approx.

0.02" (0.5 mm) longer than that of an R22 pipe so that the flare size matches the one specified. It is convenient to use a copper pipe gauge for size adjustment of the extruding margin.

CAUTION

Wrap the ball valve in a wet cloth to keep it cool and prevent the heat from the torch from damaging it when connecting the pipe to the ball valve on the gas line.

Cloth

Torch

17-EN

– 9 –

Coupling size of brazed pipe

Connected section

External size

Internal size

K

G

ØC

ØF

Standard

Connected section

Min.

External size

Internal size

outer dia.

Min. depth of

thickness

Standard outer dia.

of connected

insertion

Oval value

of

copper pipe

(Allowable difference)

coupling

C

F

K

G

in

mm

in

mm

in

mm

in

mm

in

mm

in

mm

in

mm

Ø1/4

6.35

1/4"(±0.0012)

6.35(±0.03)

0.25" (−+00..00080016)

6.45 (−+00..0204)

0.28

7

0.24

6

0.0024" or less

0.06 or less

0.020"

0.50

Ø3/8

9.52

3/8"(±0.0012)

9.52(±0.03)

0.38" (−+00..00080016)

9.62 (−+00..0204)

0.31

8

0.28

7

0.0031" or less

0.08 or less

0.024"

0.60

Ø1/2

12.7

1/2"(±0.0012)

12.70(±0.03)

0.5" (−+00..00080016)

12.81 (−+00..0204)

0.35

9

0.31

8

0.0039" or less

0.10 or less

0.028"

0.70

Ø5/8

15.88

5/8"(±0.0012)

15.88(±0.03)

0.63" (−+00..00080016)

16.00 (−+00..0204)

0.35

9

0.31

8

0.0051" or less

0.13 or less

0.031"

0.80

Ø3/4

19.05

3/4"(±0.0012)

19.05(±0.03)

0.76" (−+00..00120012)

19.19 (−+00..0303)

0.43

11

0.39

10

0.0059" or less

0.15 or less

0.031"

0.80

Ø7/8

22.2

7/8"(±0.0012)

22.22(±0.03)

0.88" (−+00..00120012)

23.36 (−+00..0303)

0.43

11

0.39

10

0.0063" or less

0.16 or less

0.032"

0.82

Ø1-1/8

28.58

1-1/8"(±0.0012)

28.58(±0.04)

1.13" (−+00..00080024)

28.75 (−+00..0206)

0.51

13

0.47

12

0.0079" or less

0.20 or less

0.039"

1.00

Ø1-3/8

34.92

1-3/8"(±0.0012)

34.90(±0.04)

1.38" (−+00..00160016)

35.11 (−+00..0404)

0.55

14

0.51

13

0.0098" or less

0.25 or less

0.047"

1.20

Ø1-5/8

41.28

1-5/8"(±0.0012)

41.28(±0.05)

1.63" (−+00..00080031)

42.28 (−+00..0208)

0.59

15

0.55

14

0.0110" or less

0.28 or less

0.053"

1.35

■ Selection of pipe size

Capacity code of indoor and outdoor units

Selection of pipe material

•For the indoor unit, the capacity code is decided at each capacity type. (Table 1)

•The capacity codes of the outdoor units are decided at each capacity type. The maximum number of connectable indoor units and the total value of capacity codes of the indoor units are also decided. (Table 2)

NOTE

Compared with the capacity code of the outdoor unit, the total value of capacity codes of the connectable indoor units differs based on the height difference between the indoor units.

When the height difference between the indoor units is 49 ft (15 m) or less

Total indoor capacity code must be between 80% and 135% of the capacity of the outdoor unit.

When the height difference between the indoor units is over 49 ft (15 m)

Total indoor capacity code must be between 80% and 105% of the capacity of the outdoor unit.

•If MMU-AP0072H2UL-1 or MMU-AP0122H2UL is included in the system, total indoor capacity code must be between 80% and 100% of outdoor unit capacity.

•If MMD-AP BH is included in the system, total indoor capacity code must be,

•when the height difference between the indoor units is over 49 ft (15 m): between 80% and 105%

•when the height difference between the indoor units is 49 ft (15 m) or less: between 80% and 120%

*If the system configure only the limited indoor unit type and limited number of connection indoor unit, total indoor capacity code up to 150% of the outdoor capacity code is available when the height difference between the indoor units is 49 ft (15 m) or less.

•If the minimum capacity of the connected indoor units is to be more than 50% and less than 80%, there are limiting conditions.

For more information, please refer to the engineering data book.

18-EN