Toshiba MML-AP0074H2UL User manual

Manuel d’installation 17
Français
Installation Manual 1
English
For commercial use
Pour usage commercial
Indoor Unit
Model name:
Floor Console Exposed Type
MML-AP0074H2UL
MML-AP0094H2UL
MML-AP0124H2UL
MML-AP0154H2UL
MML-AP0184H2UL
MML-AP0244H2UL
AIR CONDITIONER (MULTI TYPE)
Installation Manual
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Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Selection of installation place. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5 Drain piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
6 Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
8 Applicable controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
9 How to change the discharge port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
10 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Please read this Installation Manual carefully before installing the Air Conditioner.
• This Manual describes the installation method of the indoor unit.
• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.
ADOPTION OF NEW REFRIGERANT
This Air Conditioner uses R410A an environmentally friendly refrigerant.
1Precautions for safety
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 cleaning heat exchanger. 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. Keep quenching cloth and fire extinguisher nearby
during brazing. 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.
The manufacturer shall not assume any liability for the damage caused by not observing the description of this
manual.
WARNING
•Only a qualified installer or service person is allowed to do installation work.
Inappropriate installation may result in water leakage, electric shock or fire.
•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.
•Connect ground wire. (grounding work)
Incomplete grounding may cause an electric shock.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.
•Turn off all the circuit breaker before attempting any electrical work.
Failure to do so may cause electric shock.
•Install the refrigerant pipe securely during the installation work before operating the air conditioner.
If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and
the refrigeration cycle is over pressurized, which may cause a burst or injury.
•When moving the air conditioner for the installation into another place, do not enter any gaseous matter
other than the specified refrigerant into the refrigeration cycle.
If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high
and it resultingly causes pipe burst and injuries on persons.
•Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire.
•When the air conditioner is installed in a small room, provide appropriate measures to ensure that the
concentration of refrigerant leakage occur in the room does not exceed the critical level.
•Install the air conditioner securely in a location where the base can sustain the weight adequately.
•Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
•If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.
•After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might
generate.
•Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Use
an exclusive power supply for the air conditioner at the rated voltage.
An insufficient power supply capacity or inappropriate installation may cause fire.
•Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces applied
to the terminals from affecting the terminals.
•Conform to the regulations of the local electric company when wiring the power supply.
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EN
•For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the
compressor before disconnecting the refrigerant pipe.
If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air
and the refrigeration cycle is over pressurized, which may cause a burst or injury.
•Before carrying out the installation, maintenance, repair or removal work, set the circuit breaker to the OFF
position.
Otherwise, electric shocks may result.
•Do not touch the aluminum fin of the 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.
•Install the air conditioner securely in a location where the base can sustain the weight adequately. If the
strength is not enough, the unit may fall down resulting in injury.
•Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the
local regulations and laws.
•Install the circuit breaker where it can be easily accessed by the agent.
•Under no circumstances the power wire must not be extended. Connection trouble in the places where the
wire is extended may give rise to smoking and/or a fire.
•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.
CAUTION
•This air conditioner adopts the new 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.
• Exclusive new tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and make sure that water or dust does not
enter.
•Tighten the flare nut with a torque wrench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.
•Wear heavy gloves during the installation work to avoid injury.
2Accessory parts
Part name Q’ty Shape Usage
Installation Manual 1 This manual (Hand over to customers)
Heat insulating pipe 2 For heat insulation of pipe connecting section
Bushing 1 For protection of edge at control wire taking-in port
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3Selection of installation place
Avoid installing in the following places.
Select a location for the indoor unit where the cool or warm air will circulate evenly.
Avoid installation in the following locations.
• Saline area (coastal area).
• Locations with acidic or alkaline atmospheres (such as areas with hot springs, factories where chemicals or
pharmaceuticals are made and places where the exhaust air from combustion appliances will be sucked into the
unit).
Doing so may cause the heat exchanger (its aluminum fins and copper pipes) and other parts to become
corroded.
• Locations with atmospheres consisting of mist of cutting oil or other types of machine oil.
Doing so may cause the heat exchanger to become corroded, mists caused by the blockage of the heat
exchanger to be generated, the plastic parts to be damaged, the heat insulators to peel off, and other such
problems to result.
• Locations where vapors from food oils are formed (such as kitchens where food oils are used).
Blocked filters may cause the air conditioner’s performance to deteriorate, condensation to form, the plastic parts
to be damaged, and other such problems to result.
• Locations near obstructions such as ventilation openings or lighting fixtures where the flow of the blown air will
be disrupted (a disruption of the air flow may cause the air conditioner’s performance to deteriorate or the unit to
shut down).
• Locations where an in-house power generator is used for the power supply.
The power line frequency and voltage may fluctuate, and the air conditioner may not work properly as a result.
• On truck cranes, ships or other moving conveyances.
• The air conditioner must not be used for special applications (such as for storing food, plants, precision
instruments or art works).
(The quality of the items stored may be degraded.)
• Locations where high frequencies are generated (by inverter equipment, in-house power generators, medical
equipment or communication equipment).
(Malfunctioning or control trouble in the air conditioner or noise may adversely affect the equipment’s operation.)
• Locations where there is anything under the unit installed that would be compromised by wetness.
(If the drain has become blocked or when the humidity is over 80%, condensation from the indoor unit will drip,
possibly causing damage to anything underneath.)
• In the case of the wireless type of system, rooms with the inverter type of fluorescent lighting or locations
exposed to direct sunlight.
(The signals from the wireless remote control may not be sensed.)
• Locations where organic solvents are being used.
• The air conditioner cannot be used for liquefied carbonic acid cooling or in chemical plants.
• Location near doors or windows where the air conditioner may come into contact with high-temperature, high-
humidity outdoor air.
(Condensation may occur as a result.)
• Locations where special sprays are used frequently.
Installation space Unit: in (mm)
Reserve sufficient space required for installation or service work.
Filter cleaning sign term setting
The lighting term setup of the filter sign (Notification of filter cleaning) of the remote control can be changed
according to the condition of installation.
For setup method, refer to “Filter sign setting” in the Applicable controls of this Manual.
11.8"
(300)
or more
19.7" (500) or more
39.4" (1000) or more
Front side
(In case of right direction piping)
Front side
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EN
4Installation
CAUTION
Strictly comply with the following rules to prevent damage of the indoor units and human injury.
• Do not put a heavy article on the indoor unit or let a person get on it. (Even units are packaged)
• Carry in the indoor unit as it is packaged if possible. If it is necessary to carry the indoor unit unpacked, then use
buffering cloth or other material so as to not damage the unit.
• To move the indoor unit, hold the bottom face of the unit only.
Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, resin parts or other parts).
• Have two or more people carry the package, and do not bundle it with plastic band at positions other than specified.
Install an indoor unit as described below.
1Remove the air intake grille (4 hooks at top and bottom each)
2Remove the fan guard (4 screws) for piping work.
3Remove the front panel (2 screws) for wiring work
4Start piping and wiring works.
5Keep the front space of the indoor unit as wide as possible.
A wide space is required for maintenance and service works as then it is useful for distributing cool / hot air in
the room resulting in increase of cooling / heating effect.
6Install the indoor unit horizontally or slanting a little rightward viewed from the front side.
Fan guard screws
<Good installation> <Poor installation>
Front panel screws
Front panel
Hock
Hock
Hock
Hock
Fan guard
Air intake grille
External dimensions Unit: in (mm)
10.2" (260) 9.1" (230)
27.2" (690)
37.4" (950)
24.8" (630)
6.1" (155)
9.4" (240)
7.9" (200)
1.4" (35)
( )
5.2" (133)
17.3" (440)
2.2"
(57)
5.1" (130)
1.2" (30)
1.4" (35)
2.8" (70)
3.8" (97)
2.0" (50)
4.7" (120)
27.6" (700)
20.5" (520)
3.9" (100)
2.4" (61)
1.3" (34)
10.2" (258)
7.5" (190)
4.3" (110)
1.1" (27)
7.0" (177)
4.2" (106)
6.4" (162) 1.4" (35)
5.9" (150)
1.3" (33)
5.1" (130)
15.7" (400) 4.7" (120)
5.1" (130)
5.9" (150)
0.4" × 0.8" (10 × 20)
long hole
Operation switch section
(Sold separately)
Conduit pipe (including the power supply),
Drain pipe and Refrigerant pipe port
(2.0" × 3.9" (50 × 100) knockout hole)
(Both sides)
Model MML- A B
AP007, AP009,
AP012 type Ø1/4" (6.4) Ø3/8" (9.5)
AP015, AP018 type
Ø1/4" (6.4) Ø1/2" (12.7)
AP024 type Ø3/8" (9.5) Ø5/8" (15.9)
Air discharge port
Air intake port
Hole for wall
fixing × 2
(with Ø0.87" (22)
knockout hole)
Power supply
cord hole
(Ø1.0" (26) knockout)
(Both sides)
Hole for wall fixing
(2- 0.5" × 1.0"
(12 × 25) long hole)
left side
Refrigerant pipe port
(Ø5.1" (130) knockout hole)
Conduit hole
for power supply cable
Ø7/8" (22.2)
Conduit hole (Knockout hole)
Ø7/8" (22.2)
Refrigerant pipe
connection port
Ø1/4" (6.4)
(Liquid side ØA)
Conduit hole positional drawing
Dimensions
Mounting hole (Floor)
(2- Ø0.4" (10)) Conduit pipe (including the power supply), Drain pipe and Refrigerant pipe port
(2.0" × 3.9" (50 × 100) knockout hole)
Refrigerant pipe
connection port
Ø3/8" (9.5) (Gas side ØB)
Drain pipe connection port
(Ø0.8" (20))
Piping positional drawing
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Fixing the indoor unit to wall
Fix the indoor unit to the wall as described below.
1Fix four 0.3" (M8) anchor bolts to the wall, as
shown in the following figure.
2Attach the bolts carefully to the upper two
anchor bolts, as shown in the following
figure.
3Open the knockout hole at rear side of the
indoor unit with a screwdriver.
4Hang the indoor unit to the anchor bolts.
5Tighten the nuts to the two lower anchor
bolts.
Unit: in (mm)
Fixing the indoor unit to floor
To fix the indoor unit to the floor, pass two anchor bolts
attached on the floor through a hole of the bottom plate
of the indoor unit. Tighten and fix it with the nuts.
Unit: in (mm)
Installation of remote control
(Sold separately)
For installation of the wired remote control, follow the
Installation Manual attached with the remote control.
• Pull out the remote control cord together with the
refrigerant pipe or drain pipe.
Pass the remote control cord through upper side of
the refrigerant pipe and drain pipe.
• Do not leave the remote control at a place exposed
to direct sunlight and near a stove.
Wireless remote control
The sensor of indoor unit with wireless remote control
can receive a signal from a distance within approx. 23’
(7 m). Based on this, determine a place where the
remote control can be operated and the installation
place.
• Operate the remote control, confirm that the indoor
unit receives a signal, and then install it.
• Keep it 3.3' (1 m) or more from devices such as
television, stereo etc.
(Disturbance of image or noise may generate.)
• To prevent malfunction, select a place away from
fluorescent light or direct sunlight.
• Two indoor units with wireless type remote control
can be installed in the same room.
27.6" (700)
4.9"
(125)
8.5" (215)
5.2"
(133)
17.3"
(440)
2.2"
(57)
20.5" (520)
Mount the upper two nuts as
shown in the figure below. Tighten the lower two nuts after the unit has been mounted.
0.04" to 0.08"
(1 to 2)
0.6" (15) MAX
Screwdriver
Knockout hole
5.9"
(150)
15.7" (400) 10.8" (275)
Rear
Anchor bolts (two at left and right)
Front
23’ (7 m) or less
5Drain piping
CAUTION
•Following the Installation Manual, perform the drain piping work so that water is properly drained. Apply a
heat insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furniture.
•After opening the knockout hole, deburr the edge.
Burrs adhered to opening of the knockout hole may causes an injury by touching it.
• Provide the indoor drain piping with proper heat insulation.
• Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat insulation
will cause condensation to form.
• The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.
• Restrict the length of the traversing drain pipe to 65.6’ (20 m) or less. For a long pipe, provide support brackets
at intervals of 4’11" to 6’7" (1.5 to 2 m) to prevent flapping.
• Install the collective piping as shown in the following figure.
• Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
• Do not allow any force to be applied to the connection area with the drain pipe.
Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Pipe material Hard vinyl chloride pipe, pipe elbow (Nominal inner diameter Ø0.8" (20 mm))
Insulator Foamed polyethylene foam, thickness: 0.4" (10mm) or more
Drain pan
Drain hose
Use adhesive for hard polyvinyl chloride pipe
Hard polyvinyl chloride pipe
Elbow
Insulation
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Piping method
The drain pipe and the refrigerant pipe can be connected to left, right, rear or bottom side arbitrarily depending on
the installation location.
Select a set knockout hole referring to the following figure.
Connecting drain pipe
Insert the drain hose into the connector until the hose can go no farther.
REQUIREMENT
• Connect the hard vinyl chloride pipes by using adhesive agents for vinyl chloride so that water does not leak.
• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.) Do not apply any
extra force on the connecting section until the adhesive agent is dried.
Check the draining
• In the test run, check that water drain is properly performed and that water does not leak from the connecting
part of the pipes. Check draining also when installed in heating period.
• Remove the cover from the bottom side of the heat exchanger. Pour water to the drain pan. Confirm that water
drains well and does not leak from the drain hose connecting part.
• Once the drain is confirmed, attach back the cover in the way it was.
CAUTION
Water must be poured slowly.
If water is swiftly poured, water may spatter across the inside of the indoor unit. It may cause malfunction of the unit.
For left side
Hole for control wire
For rear side For right side
Conduit pipe (including the power supply),
drain hose and refrigerant pipe port
Hole for control wire
Conduit pipe (including the
power supply), drain hose
and refrigerant pipe port
Conduit pipe (including the
power supply), drain hose
and refrigerant pipe port
Conduit pipe (including the
power supply), drain hose
and refrigerant pipe port
For bottom
side
6Refrigerant piping
CAUTION
When the refrigerant pipe is long, provide support
brackets at intervals of 8’2” to 9’10” (2.5 to 3 m) to clamp
the refrigerant pipe. Otherwise, abnormal sound may be
generated.
Use the flare nut attached with the indoor unit or R410A
flare nut.
Permissible piping length and
height difference
They vary depending on the outdoor unit. For details,
refer to the Installation Manual attached to the outdoor
unit.
Pipe size Unit: in (mm)
Connecting refrigerant piping
Flaring
1Cut the pipe with a pipe cutter.
Remove burrs completely. (Remaining burrs may
cause gas leakage.)
2Insert a flare nut into the pipe, and flare the
pipe.
Use the flare nut provided with the unit or the one
used for the R410A refrigerant. The flaring
dimensions for R410A are different from the ones
used for the conventional R22 refrigerant. A new
flare tool manufactured for use with the R410A
refrigerant is recommended, but the conventional
tool can still be used if the projection margin of the
copper pipe is adjusted to be as shown in the
following table.
Projection margin in flaring: B
Unit: in (mm)
Flaring diameter size: A
Unit: in (mm)
* In case of flaring for R410A with the conventional
flare tool, pull it out approx. 0.02” (0.5 mm) more than
that for R22 to adjust to the specified flare size. The
copper pipe gauge is useful for adjusting projection
margin size.
• The sealed gas was sealed at the atmospheric
pressure so when the flare nut is removed, there will
be no “whooshing” sound: This is normal and is not
indicative of trouble.
• Use two spanners to connect the indoor unit pipe.
Model MML- Pipe size
Gas side Liquid side
AP007 to AP012 3/8" (9.5) 1/4" (6.4)
AP015, AP018 1/2" (12.7) 1/4" (6.4)
AP024 5/8" (15.9) 3/8" (9.5)
Outer dia. of
copper pipe R410A tool used Conventional tool used
1/4" to 5/8"
(6.4 to 15.9)
0 to 0.02"
(0 to 0.5)
0.04" to 0.06"
(1.0 to 1.5)
Outer dia. of copper pipe A +0
–0.02" (0.4)
1/4" (6.4) 0.36" (9.1)
3/8" (9.5) 0.52" (13.2)
1/2" (12.7) 0.65" (16.6)
5/8" (15.9) 0.78" (19.7)
B
A
Work using two spanners
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• Use the tightening torque levels as listed in the
following table.
• Tightening torque of flare pipe connections.
Pressure of R410A is higher than that of R22.
(Approx. 1.6 times) Therefore, using a torque
wrench, tighten the flare pipe connecting sections
which connect the indoor and outdoor units of the
specified tightening torque.
Incorrect connections may cause not only a gas leak,
but also a trouble of the refrigeration cycle.
CAUTION
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Airtight test / air purge, etc.
For air tightness test, adding refrigerant, refer to the
Installation Manual attached to the outdoor unit.
CAUTION
Do not supply power to the indoor unit until the airtight
test and vacuuming are completed. (If the indoor unit is
powered on, the pulse motor valve is fully closed, which
extends the time for vacuuming.)
Open the valve fully
Open the valve of the outdoor unit fully.
Heat insulation process
Apply heat insulation for the pipes separately at liquid
side and gas side.
• For the heat insulation to the pipes at gas side, use
the material with heat-resisting temperature 248 °F
(120 °C) or higher.
• To use the attached heat insulation pipe, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
Insulate the refrigerant pipe in the indoor unit securely up
to the point shown in the following figure.
Outer dia. of connecting
pipe (in (mm)) Tightening torque (ft•lbs (N•m))
1/4" (6.4) 10 to 13 (14 to 18)
3/8" (9.5) 24 to 31 (33 to 42)
1/2" (12.7) 37 to 46 (50 to 62)
5/8" (15.9) 46 to 57 (63 to 77)
Adhesive tape
Heat insulator
(accessory)
Heat insulator
Gas pipeLiquid pipe
7Electrical connection
WARNING
1. Use predefined wire and connect them certainly.
Keep the connecting terminal free from external
force.
Improper wire connection or clamping may result in
exothermic, fire or malfunction.
2. Connect ground wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.
3. Install appliance in accordance with national
wiring regulations.
Capacity shortage of circuit breaker or incomplete
installation may cause an electric shock or a fire.
CAUTION
• Consult local building codes, NEC (National Electrical
Code) or CEC (Canadian Electrical Code) for special
requirements.
• If incorrect / incomplete wiring is carried out, it will
cause an electrical fire or smoke.
• If circuit breaker is not installed, an electric shock may
be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and
inner insulator of power and control wires when
peeling them.
• Use the power cord and control wire of specified
thickness, type, and protective devices required.
• Do not connect 208 / 230 V power to the terminal
blocks (U1, U2, A, B etc.) for control wiring.
(Otherwise, the system will fail.)
• Perform the electric wiring so that it does not come to
contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
• Do not turn on the circuit breaker of the indoor unit
until vacuuming of the refrigerant pipes is completed.
REQUIREMENT
• For power supply wiring, strictly conform to the Local
Regulation in each country.
• Run the refrigerant piping line and control wiring line in
the same line.
Power supply wire and
control wires specifications
Power supply wire and control wires are locally
procured.
For the power supply specifications, follow the table
below. If the capacity is too low, overheat or seizure
may occur.
Indoor unit power supply
For the power supply of the indoor unit, prepare the
exclusive power supply separated from that of the
outdoor unit.
▼Power supply
Control wiring, Central control wiring
• 2-core with non-polarity wires are used for the
control wiring between indoor unit and outdoor unit
and Central control wiring.
• To prevent noise trouble, use 2-core shielded wire.
• The length of the communication line means the total
length of the control wire length between indoor and
outdoor units added with the central control wire
length.
Power supply 208 / 230-1-60
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EN
Power supply wire
Recommended wire diameter and wire length for power supply wire.
▼Electric characteristics
MCA : Minimum Circuit Amps
MOCP : Maximum Overcurrent Protection (Amps)
Control wire
Remote control wiring
2-core with non-polarity wire is used for wiring of the remote control wiring and group remote controls wiring.
NOTE
• Use copper supply wire.
• Use UL wire rated 600 V for the power supply.
• Use UL wire rated 300 V for the remote control wires and control wires.
Power supply wiring Wire size: 2 ×AWG12
Ground 1 ×AWG12 or thicker Up to 164’1” (50 m)
Model Power Supply Voltage Range (V) MCA MOCP
Min Max (A) (A)
MML-AP0074H2UL
208 / 230 V-1-60 Hz 187 253
0.4 15
MML-AP0094H2UL 0.4 15
MML-AP0124H2UL 0.6 15
MML-AP0154H2UL 0.6 15
MML-AP0184H2UL 0.7 15
MML-AP0244H2UL 0.7 15
Control wiring between indoor units, and outdoor unit (2-core
shielded wire) Wire size (Up to 3280’10” (1000 m)) AWG16 (Up to 6561’8” (2000 m)) AWG14
Remote control wiring, remote control inter-unit wiring Wire size: AWG20
Total wire length of remote control wiring and remote control
inter-unit wiring = L + L1 + L2 + … Ln
In case of wired type only Up to 1640’5” (500 m)
In case of wireless type included Up to 1312’4” (400 m)
Total wire length of remote control inter-unit wiring = L1 + L2 + … Ln Up to 656’2” (200 m)
L1
L
L2 Ln
Indoor unit
Remote control inter-unit wiring
Indoor unit Indoor unit Indoor unit
Remote
control
(Max. 8 units)
Remote
control
wiring
CAUTION
Do not put the remote control wires and power supply wires (AC208 / 230 V) in the same conduit. Doing so may cause
trouble in the control system due to noise or other factors.
Wiring between indoor and outdoor units
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the header
unit.
▼Wiring example
U1U2
U1U2U3U4L1 L2 L3 N U5U6
L1L2 A BU1U2L1L2 A B U1U2L1L2 A B U1U2L1L2 A B
A B
U1U2U3U4L1 L2 L3 N U5U6
A B A B
Outdoor Power supply
Ground
terminal Ground terminal
Outdoor Power supply
Circuit breaker Circuit breaker
Header outdoor unit Follower outdoor unit
Control wiring between outdoor units
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor unit Indoor unit Indoor unit Indoor unit
Ground Ground Ground Ground
Remote
control Remote control Remote control
Indoor
power
supply
Circuit
breaker
208 /
230-1-60
Disconnect
switch per NEC
Disconnect
switch per
NEC
Disconnect
switch per
NEC
Disconnect
switch per
NEC
Group control
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Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers.
Incorrect connection can cause problems.
• Pass the wires through the bushing of wire connection
holes of the indoor unit.
• Keep a margin (Approx. 3.9" (100 mm)) on a wire to
hang down the electrical control box for servicing or
other purpose.
• The low-voltage circuit is provided for the remote
control. (Do not connect it to high-voltage circuit)
• Run the power supply wire through a conduit pipe up
to the conduit mounting plate in the indoor unit.
(It is recommended to use a flexible conduit pipe.)
• Draw in the wire from the pipe hole (Knockout hole).
• Provide adequate length to the wire and fix it with
cord clamp as shown in the figure.
Unit: in (mm)
CAUTION
Firmly tighten the screws of the terminal block.
Keep the wire length as shown in figure below when it
is connected to the terminal block.
Remote control wiring
Strip off approx. 0.4" (9 mm) the wire to be connected.
▼Wiring diagram
Address setup
Set up the addresses as per the Installation Manual
supplied with the outdoor unit.
L2L1
BA
Indoor / Outdoor control wire
Remote control
terminal block
Power supply
terminal block
Electrical control box
Ground screw
Cord clamp
Power supply wire
Remote control wire
Control wire
between indoor
and outdoor units
L 1 L 2
0.8" (20) 1.2" (30)
0.4" (10)
Ground wire
0.08" (2) or less
Power supply wires and control
wire
A
B
A
B
Terminal block
Remote
control unit
Terminal block for
remote control wiring of
indoor unit
Remote control wire
(Locally procured)
Installation procedure for Single port type Flow Selector unit
1Remove the two fixing screws inside of the
discharge port.
2Insert your hand into the discharge port,
push up the back side a little, and then
remove the discharge port from the hooks at
rear side.
3Remove the 3 screws that fix the switch box.
4Slightly lift up the front of the switch box and
remove it by pushing toward the top while
keeping it tilted.
5Connect the Power supply and
communication lead wire of the Single port
type Flow Selector unit to CN081.
Switch box
CN081
FS unit lead wire
FS unit power
supply lead wire
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