background image

Room A

Room C

Room D

Room B

power supply

Wiring (2)

Stranded wire

Round crimp-style
terminal

When connecting the connection wires to the 
terminal board using a single core wire, be sure to 
perform curling.
Problems with the work may cause heat and fires.

CAUTION (2)

In case using stranded wires is unavoidable, make 
sure to install the round crimp-style terminals on the 
tip.

Place the round crimp-style terminals on the wires 
up to the covered part and secure in place. 

CAUTION (1)

Arrow view 

This air conditioner must be grounded.
For grounding, follow all local, and state electrical 
codes.

Ground

Do not turn ON the safety breaker until all work is 
completed.

<Wiring procedure>
 1) Strip the insulation from the wire (3/4”).
 2) Connect the connection wires between the indoor and 

outdoor units 

so that the terminal numbers match. 

Tighten the terminal screws securely. We recommend 
a flathead screwdriver be used to tighten the screws. 
The screws are packed with the terminal board. 

 3)  

Be sure to match the symbols for wiring and piping.

 4) Pull the wire and make sure that it does not 

disconnect. Then fix the wire in place with the binding 
band.

Safety breaker

Ground fault circuit

interrupter breaker

Outdoor unit

60Hz 208/230V

Be sure to use the dedicated circuits.

To room B

To room C

To room D

Use AWG 16 or AWG 14 wire for the power supply and 
interconnecting wires.

Room

A

Room A

Room

C

Room

D

Room

B

Indoor unit

<Ground terminal installation>
 1) Use the following method when installing a single core 

wire.

 2) Use the following method when installing the round 

crimp-style terminal. 

A single core wire

Flat washer

Screw

Arrow view 

Flat washer

Screw

Round 
crimp-style 
terminal

Good

Round crimp-
style terminal

Flat washer

Screw

Wrong

Flat washer

Round crimp-
style terminal

Screw

Shape the wires so that there is 
no lifting of the service hatch or 
other structural parts.

Use the specified wires and 
connect them securely.

Secure the wires firmly using the 
binding band, as shown in the figure.
Secure firmly, making sure no outside 
pressure is exerted on the terminals.

Binding band

If the length of a connection wire 
is 33ft or more, use AWG14 wire.

Summary of Contents for Air Conditioner

Page 1: ...severe injury or death Do not ground units to water pipes telephone wires or lightning rods because incomplete grounding could cause a severe shock hazard resulting in severe injury or death and to gas pipes because a gas leak could result in an explosion which could lead to severe injury or death Do not ground units to telephone wires or lightning rods because lightning strikes could cause a seve...

Page 2: ...he power supply Use an only a separate dedicated power circuit Failure to do so may cause abnormal heat electric shock fire or equipment damage Use the specified types of wires for electrical connections between the indoor and outdoor units Follow all state and local electrical codes Firmly clamp the interconnecting wires so their terminals receive no external stresses Incomplete connections or cl...

Page 3: ...ter unit cables at least 9 8 feet from television and radios to prevent interference Noises may be heard even if more than 9 8 feet away depending on radio wave conditions 8 In coastal areas or other places with salty atmosphere of sulfate gas corrosion may shorten the life of the air conditioner 9 Since drain flows out of the outdoor unit do not place under the unit anything which must be kept aw...

Page 4: ... insulation pipe s cut line Wrap the insulation pipe with the finishing tape from bottom to top Right side plate Allow 11 13 16 inch of work space below the ceiling surface 9 13 16 inch from wall Allow space for piping and electrical servicing 13 3 4 in Clamping material Insulation tube Service lid Tape Also insulate the connection on the outdoor unit Use tape or insulating material on all connect...

Page 5: ...ation drawing fix the unit securely by means of the foundation bolts Prepare four sets of M12 foundation bolts nuts and washers each which are available as field supply It is best to screw in the foundation bolts until their length is 3 4 from the foundation surface Connections connection port Install the indoor unit according to the table below which shows the relationship between the class of in...

Page 6: ...iping to each indoor unit Total length of piping between all units 3MXS24 4MXS32 82ft max 230ft max Where a wall or other obstacle is in the path of outdoor unit s intake or exhaust airflow follow the installation guidelines below For any of the below installation patterns the wall height on the exhaust side should be 4ft or less Wall facing one side Walls facing two sides Walls facing three sides...

Page 7: ... house is too long and hangs down fix it carefully to prevent the kinks 4 Make sure that there is no water leakage from portion I II or III 3 Refrigerant Piping 1 Use the flare nut fixed to the main unit to prevent cracking and age deterioration 2 To prevent gas leakage apply refrigeration oil only to the inner surface of the flare Use refrigeration oil for R410A 3 Use torque wrenches when tighten...

Page 8: ...s is for 4 5 minutes and make sure the coupling meter needle does not go back If it does go back this may indicate the presence of moisture or leaking from connecting parts After inspecting all the connection and loosening then retightening the nuts repeat steps 2 4 6 Turn the liquid stop valve s rod 90 degrees counterclockwise with a hexagonal wrench to open valve Close it after 5 seconds and che...

Page 9: ...e 2 Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below 3 Use separate thermal insulation pipes for gas and liquid refrigerant pipes Even though the stop valve is fully closed the refrigerant may slowly leak out do not leave the flare nut removed for a long period of time CAUTION 1 Do not use mineral oil on flared part 2 Prevent mineral oil from getting...

Page 10: ...t for φ1 2 36 5 44 5 ft lbf Flare nut for φ5 8 45 6 55 6 ft lbf No 1 φ5 8 φ1 2 No 2 φ1 2 φ3 8 No 3 φ5 8 φ1 2 No 4 φ1 2 φ3 8 No 5 φ5 8 φ3 8 No 6 φ5 8 φ3 8 Gasket 1 Gasket 2 Reduce and gasket No 1 No 3 Flare nut for φ5 8 Inter unit piping Connection port of outdoor unit Connection port of outdoor unit Connection port of outdoor unit Be sure to attach the gasket No 5 No 6 Flare nut for φ3 8 Be sure t...

Page 11: ... malfunctioning of the ground leak detector itself 4 Use an all pole disconnection type breaker with at least 1 8 between the contact point gaps 5 When carrying out wiring connection take care not to pull at the conduit 6 Do not connect the power wire to the indoor unit Doing so may cause electric shock or fire WARNING 1 When the protection plate is removed do not turn ON the safety breaker 2 When...

Page 12: ...rd 3 Be sure to match the symbols for wiring and piping 4 Pull the wire and make sure that it does not disconnect Then fix the wire in place with the binding band Safety breaker Ground fault circuit interrupter breaker Outdoor unit 60Hz 208 230V Be sure to use the dedicated circuits To room B To room C To room D Use AWG 16 or AWG 14 wire for the power supply and interconnecting wires Room A Room A...

Page 13: ...ating all other indoor units do not operate and enter standby mode according to the operation mode of the set indoor unit 2 Priority during powerful operation If the indoor unit which is set for Priority Room Setting is operating at powerful the capabilities of other indoor units will be somewhat reduced Power supply gives priority to the indoor unit which is set for Priority Room Setting 3 Quiet ...

Page 14: ... will be saved Setting procedure Remove the SW5 jumper switch Once the settings are complete reset the power Install the removed jumper switch as described below This switch will be needed to later disable this setting NOTE Use the S15 connector to set the unit to only cool or heat Setting to only heat H short circuit pins 1 and 3 of the connector S15 Setting to only cool C short circuit pins 3 an...

Page 15: ...the outdoor unit service PC board However the wiring error check switch will not function for 3 minutes after the safety breaker is turned on or depending on the outside air conditions See Note 2 Approximately 15 20 minutes after the switch is pressed the errors in the connection wiring will be corrected The service monitor LEDs indicate whether or not correction is possible as shown in the table ...

Page 16: ...minutes measure the temperatures at the indoor unit inlet and outlet If the measurements are above the values shown in the table below then they are normal Items to Check During cooling operation frost may form on the gas stop valve or other parts This is normal Operate the indoor units in accordance with the included operation manual Check that they operate normally Temperature difference between...

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