Selecting The Installation Location; Specifications; Refrigerant Pipes; Connecting Wires And The Ground Wire - Mitsubishi Electric MFZ-KJ09NA Installation Manual

1-2. SELECTING THE INSTALLATION LOCATION

INDOOR UNIT
• Where airflow is not blocked.
• Where air spreads over the entire room.
• Rigid wall and flat floor without vibration.
• Where it is not exposed to direct sunlight. Do not
expose to direct sunlight also during the period fol-
lowing unpacking to before use.
• Where easily drained.
• At a distance 3 ft. (1 m) or more away from your
TV and radio. Operation of the air conditioner may
interfere with radio or TV reception. An amplifier may
be required for the affected device.
• In a place as far away as possible from fluorescent
and incandescent lights. In order to make the infrared
remote control operate the air conditioner normally.
The heat from the lights may cause deformation or
the ultraviolet may cause deterioration.
• Where the air filter can be removed and replaced
easily.
• Where it is away from the other heat or steam source.
REMOTE CONTROLLER
• Where it is easy to operate and easily visible.
• Where children cannot touch it.
• Select the position where the indoor unit can receive
the signal from the remote controller properly. Check
that signals from the remote controller are surely re-
ceived by the indoor unit from that position ('beep' or
'beep beep' receiving tone sounds). After that, attach
remote controller holder to a pillar or wall and install
wireless remote controller.

1-3. SPECIFICATIONS

1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR
WIRE CONNECTION
• Power should be taken from an exclusive branched circuit.
• Wiring work should be based on applicable technical standards.
• Wiring connections should be made following the diagram.
• Securely tighten screws.

Connecting wires and the ground wire

• Use solid conductor Min. AWG14 or stranded conductor
Min. AWG14.
• Use double insulated copper wire with 600 V insulation.
• Use copper conductors only.
* Follow local electrical codes.
Power supply cable and ground wire
• Use solid or stranded conductor.
KJ09/12NA Min. AWG14
KJ15/18NA Min. AWG12
• Use copper conductors only.
* Follow local electrical codes.
Note:
When the indoor unit is powered from the outdoor unit, depend-
ing on local code, a disconnect switch needs to be installed to a
power supply circuit.

1-3-2. REFRIGERANT PIPES

• To prevent condensation, insulate the two refrigerant pipes.
• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.
CAUTION
Be sure to use the insulation of specified thickness (table on the
right). Excessive insulation may cause incorrect installation of
the indoor unit, and too little insulation may cause condensate
to form.
• The unit has flared connections on both indoor and outdoor
sides.
• Remove the valve cover from the outdoor unit, then connect
the pipe.
• Refrigerant pipes are used to connect the indoor and outdoor
units.
• Be careful not to crush or over bend the pipe in pipe bending.
• Refrigerant adjustment... If pipe length exceeds 25 ft. (7.5 m),
additional refrigerant (R410A) charge is required.
(The outdoor unit is charged with refrigerant for pipe length up
to 25 ft. [7.5 m])
Note:
In rooms where inverter type fluorescent lamps are
used, the signal from the wireless remote controller
may not be received.
OUTDOOR UNIT
• Where it is not exposed to strong wind.
• Where airflow is good and dustless.
• Where rain or direct sunlight can be avoided as much
as possible.
• Where neighbours are not annoyed by operation
sound or hot air.
• Where rigid wall or support is available to prevent
the increase of operation sound or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit at a high level, be sure to
secure the unit legs.
• Where it is at least 10 ft. (3 m) away from the antenna
of TV set or radio. Operation of the air conditioner may
interfere with radio or TV reception in areas where
reception is weak. An amplifier may be required for
the affected device.
• Install the unit horizontally.
• Please install it in an area not affected by snowfall
or blowing snow. In areas with heavy snow, please
install a canopy, a pedestal and/or some baffle
boards.
Note:
It is advisable to make a piping loop near outdoor unit
so as to reduce vibration transmitted from there.
Electrical specifications
MODEL
INDOOR UNIT
Power supply (V, PHASE, Hz)
Min. Circuit Ampacity
Fan motor (F.L.A.)
OUTDOOR UNIT
Power supply (V, PHASE, Hz)
Max. Fuse size (time delay) (A)
Min. Circuit Ampacity
Fan motor (F.L.A.)
(R.L.A.)
Compressor
(L.R.A.)
Control voltage
Pipe
For liquid MFZ-KJ09/12/15/18NA
MFZ-KJ09/12NA
For gas
MFZ-KJ15/18NA
Pipe length
Height difference
No. of bends
Pipe length
Refrigerant to be
added
Note:
When operating the air conditioner in low outside
temperature, be sure to follow the instructions
described below.
• Never install the outdoor unit in a place where its air
inlet/outlet side may be exposed directly to wind.
• To prevent exposure to wind, install the outdoor
unit with its air inlet side facing the wall and a baffle
board on the air outlet side.
Avoid the following places for installation where air
conditioner trouble is liable to occur.
• Where flammable gas could leak.
• Where there is an excessive amount of machine
oil in the air.
• Where oil is splashed or where the area is filled
with oily smoke (such as cooking areas and fac-
tories, in which the properties of plastic could be
changed and damaged).
• Salty places such as the seaside.
• Where sulfide gas is generated such as hot spring,
sewage, waste water.
• Where there is high-frequency or wireless equip-
ment.
• Where there is emission of high levels of VOCs,
including phthalate compounds, formaldehyde,
etc., which may cause chemical cracking.
MFZ-KJ09NA
MFZ-KJ15NA
MFZ-KJ12NA
208/230, 1, 60
(A) 1.0
(A) 0.62
208/230, 1, 60
15
(A) 11
(A) 0.50
(A) 8.2
(A) 10.3
Indoor unit - Remote controller: (Wireless)
Indoor unit - Outdoor unit: DC12-24 V (Polar)
Minimum
Outside
wall thick-
diameter
ness
inch (mm)
0.0315
1/4 (6.35)
(0.8)
0.0315
3/8 (9.52)
(0.8)
0.0315
1/2 (12.7)
(0.8)
Limits
MFZ-KJ09/12NA
MFZ-KJ15/18NA
MFZ-KJ09/12NA
MFZ-KJ15/18NA
Up to 25 ft. (7.5 m) No additional charge is required.
Additional charge is required.
Exceeding 25 ft. (7.5 m)
(Refer to the table below.)
MFZ-KJ09/12NA 1.08 oz each 5 ft. (20 g/m)
MFZ-KJ15/18NA 1.62 oz each 5 ft. (30 g/m)
MFZ-KJ18NA
0.72
20
16
0.93
12.0
15.0
Insulation
Insulation
thickness
material
5/16 (8)
Heat resistant
foam plastic
5/16 (8)
0.045 Specific
gravity
5/16 (8)
65 ft. (20 m) max.
100 ft. (30 m) max.
40 ft. (12 m) max.
50 ft. (15 m) max.
10 max.
En-2