background image

1

3

N L1

1

3

N L1

N

L1

L2

1

2

N L1

1

2

N L1

N

L1

L2

5/8 in.

 WARNING

Use the indoor/outdoor unit connecting wire that meets the Standards to connect
the indoor and outdoor units and fix the wire to the terminal block securely so that
no external force is conveyed to the connecting section of the terminal block.
Incomplete connection or fixing of the wire could result in a fire.

Attach the electrical cover securely. If it is attached incorrectly, it could result in a
fire or an electric shock due to dust, water, etc.

AIR INTAKE
GRILLE

ELECTRICAL COVER

Fixing screws

Indoor and outdoor connecting wire 

A

 CAUTION

Be careful not to make mis-wiring.

Firmly tighten the terminal screws to prevent them from loosening.

After tightening, pull the wires lightly to confirm that they do not move.

If the connecting wire is incorrectly connected to the terminal block, the unit does
not operate normally.

If a ground is incorrect, it may cause an electric shock.

4-4 AUTO RESTART FUNCTION

When the units of these models are shipped from the factory, auto restart function is
set to ON. If you want to know how to release this function, consult the service
center.

When the indoor unit  is controlled with the remote controller, the operation mode, the
set temperature, and the fan speed are memorized by the indoor electronic control
P.C. board. The auto restart function sets to work the moment the power has restored
after power failure, then, the unit will restart automatically. If the unit is operated in
“I FEEL CONTROL” mode before power failure, the operation is not memorized. In
“I FEEL CONTROL” mode, the operation is decided by the initial room temperature at
(re)start.

Operation

1

If the power of the indoor unit (115V AC) has been cut, the operation settings
remain.

Remark:

When indoor and outdoor unit are powered in separate circuit even if the power of the
outdoor unit (208/230V AC) is cut auto restart function doesn’t work.

2

When three minutes have passed after power was restored, the unit will restart
automatically according to the memory.

Notes:

The operation settings are memorized when 10 seconds have passed after the
remote controller was operated.

If the main power is turned off or a power failure occurs while AUTO START/STOP
timer is active, the timer setting is cancelled. As these models are equipped with the
auto restart function, the air conditioner should start operating at the same time that a
power has restored.

If the unit has been off with the remote controller before power failure, the auto
restart function does not work as the power button of the remote controller is off.

To prevent breaker off due to the rush of starting current, systematize other home
appliances not to turn on at the same time.

4-5 PIPE FORMING

Place the drain hose below the refrigerant piping.

Make sure that the drain hose is not heaved or snaked.

Do not pull the hose to apply the tape.

When the drain hose passes the room, be sure to wrap insulation material (obtain-
able at a store) around it.

Wrap the felt tape 

7

 around the pipe and the drain hose, then put the pipe in the

back space of the indoor unit.

Be careful drain hose is not
heaved.

Cut off in case of right piping.

Cut off in case of downward piping.

FOR REAR, RIGHT OR DOWNWARD PIPING

Pipe arrangement
Put the refrigerant piping and the drain hose together, then apply piping tape 

G

 to

them.

Insert the piping and the drain hose into the wall hole sleeve 

C

, and hook the upper

part of the indoor unit on the installation plate 

1

.

Check if the indoor unit is hooked securely on the installation plate 

1

 by moving the

unit to left and right.

Thrust the lower part of the indoor unit into the installation plate 

1

.

Drain hose

Liquid pipe

Gas pipe

Felt tape 

7

Firmly apply piping tape 

G

from the end.

MS12/15/17TN

Loosen terminal screw.

Lead wire

Terminal block

Grounding
terminal

INDOOR UNIT

Terminal block

Disconnect switch 

∗∗

115V AC 

1phase, 60Hz

DC12 V 

(Polar)

Terminal block 2

OUTDOOR UNIT

Terminal
block 1

Ground

Power supply
208/230V AC, 1phase 3wires, 60Hz

Grounding
terminal

<Connection details>

MSH12/15TN

Grounding
terminal

INDOOR UNIT

Terminal block

Disconnect switch 

∗∗

115V AC 

1phase, 60Hz

DC12 V 

(Polar)

Terminal block 2

OUTDOOR UNIT

Terminal
block 1

Ground

Power supply
208/230V AC, 1phase 3wires, 60Hz

Grounding
terminal

Connect wires to the matching numbers
of terminals.

Remark:

Indoor unit can also be
powered from an
independent power supply
[Max. Fuse size (time
delay) : 15 A].
In this case these indoor/
outdoor connecting wires
for indoor power supply
are not necessary.

∗∗

A disconnect switch may
be required.
Check the local code.

Remark:

Indoor unit can also be
powered from an
independent power supply
[Max. Fuse size (time
delay) : 15 A].
In this case these indoor/
outdoor connecting wires
for indoor power supply
are not necessary.

∗∗

A disconnect switch may
be required.
Check the local code.

CONNECTING WIRES

Wire to be AWG22 double insulated, 300 V insulation. Equal to Belden 9407
(for 12 V DC).

Use copper conductors only.

Summary of Contents for MS12

Page 1: ... main power in case of setting up the indoor electronic control P C board or wiring works It could cause an electric shock CAUTION Ground the unit Do not connect the ground to a gas pipe water pipe lightning rod or telephone ground Defective grounding could cause an electric shock Do not install the unit in a place where an inflammable gas leaks If gas leak and accumulate in the area surrounding t...

Page 2: ...s on both indoor and outdoor sides Remove the valve cover of the outdoor unit then connect the pipe Refrigerant pipes are used to connect the indoor and outdoor units Limits Pipe length 49 ft max Height difference 25 ft max No of bends 10 max Refrigerant adjustment If pipe length exceeds 25 ft additional refrigerant R 22 charge is required The outdoor unit is charged with refrigerant for pipe leng...

Page 3: ...te controller Wireless Indoor unit Outdoor unit DC12V Polar ELECTRICAL SPECIFICATIONS MODEL MSH12TN MSH15TN INDOOR UNIT Power supply V PHASE Hz 115 1 60 115 1 60 Min Circuit Ampacity 0 6 0 6 Fan motor F L A 0 43 0 43 OUTDOOR UNIT Power supply V PHASE Hz 208 230 1 60 208 230 1 60 Max Fuse size time delay A 15 20 Min Circuit Ampacity 14 14 Fan motor F L A 0 42 0 52 Compressor R L A 10 0 10 0 L R A 3...

Page 4: ...rminal MU12TN and MUH12TN MU15 17TN and MUH15TN Conduit cover Connector Lock nut Service panel Grounding terminal Connect wires to the matching numbers of terminals Remark Indoor unit can also be powered from an independent power supply Max Fuse size time delay 15 A In this case these indoor outdoor connecting wires for indoor power supply are not necessary A disconnect switch may be required Chec...

Page 5: ...at the same time that a power has restored If the unit has been off with the remote controller before power failure the auto restart function does not work as the power button of the remote controller is off To prevent breaker off due to the rush of starting current systematize other home appliances not to turn on at the same time 4 5 PIPE FORMING Place the drain hose below the refrigerant piping ...

Page 6: ...the same method as the indoor unit For tightening use the same tightening torque applied for indoor unit and tighten the flare nut with torque wrench or spanner INSULATION AND TAPING 1 Cover piping joints with pipe cover 2 For outdoor unit side surely insulate every piping including valves 3 Using piping tape G apply taping starting from the entry of outdoor unit Fix the end of piping tape G with ...

Page 7: ... to which the drain hose is to be attached at the rear right of the indoor unit Insert the drain hose fully into the drain pan Check if the hose is hooked securely to the projection of its inserting part at the drain pan INDOOR UNIT INSTALLATION Insert the drain hose into the wall hole sleeve C and hook the upper part of indoor unit on the installation plate 1 Then move the unit to the very edge o...

Page 8: ...rated with the remote controller both the test run and the emergency operation are released by commands from the remote controller Once the compressor stops the restart preventive device operates so the compressor will not operate for three minutes to protect the air conditioner 6 5 EXPLANATION TO THE CUSTOMER Using the OPERATING INSTRUCTIONS explain the following to the customer how to control te...

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