Akai AK-T25R32 User manual

PROTECT YOUR WARRANTY
This unit must be installed by a registered,
licensed installer as required by
Government regulations.
INSTALLATION MANUAL
Model Number AK-T25R32
2.5kW Reverse Cycle Inverter
Split System Air Conditioner

2After Sales Support
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Contents
03 Installation Safety Instructions
08 Product Overview
11 Selecting the Installation Place
13 Installation
21 Information for the Installer
26 Other Useful Information

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Installation Safety Instructions
For the installer: installation safety precautions
• Read this guide completely before installing and using the appliance.
• Install the appliance in accordance with national wiring regulations and all
applicable regulations.
• During installation of the indoor and outdoor units, do not allow children
access to the working area.
• Do NOT install the unit:
• In environments where the air could contain gas, oil or sulphur.
• Near sources of heat.
• At a distance of less than 50cm from flammable substances (e.g. alcohol or
other flammable liquids or gases) and pressurised containers (e.g. spray cans).
• If the appliance is used in areas without the possibility of ventilation,
precautions must be taken to prevent any leaks of refrigerant gas from
remaining in the environment and creating a fire danger.
• Make sure that the base of the outdoor unit is firmly fixed.
• Before accessing the terminals, all the power circuits must be disconnected
from the power supply.
• Ensure that the mains voltage corresponds to that stamped on the rating
plate. Keep the switch or power plug clean.
• Check and ensure that the socket is suitable for the plug.
• The appliance must be fitted with means for disconnection from the
supply mains having a contact separation in all poles that provide full
disconnection under overvoltage category III conditions, and these means
must be incorporated in the fixed wiring in accordance with the wiring rules.
• The ratings of the fuse installed in the built-in control unit are T 5A / 250V.
• The indoor unit must be protected with a fuse of suitable capacity for the max.
input current or with another overload protection device.
• The packaging materials are recyclable and should be disposed of responsibly
for recycling. This air conditioner contains a flammable refrigerant, which must
be removed before disposal. Contact your municipal authorities for any codes
or regulations concerning the disposal of such materials.
PROTECT YOUR WARRANTY
Do not try to install the Air Conditioner on your own; doing so will
expose you to danger and void the warranty.
These instructions for installation of the Reverse Cycle Inverter Air
Conditioner are for use by an appropriately qualified, licensed installer. The
appliance must be installed in accordance with national wiring regulations.

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Installation Safety Instructions (Cont.)
The refrigerant used in this air conditioner, R32, is an odourless hydrocarbon
gas with a high level of environmental compatibility, with significantly lower global
warming potential (GWP) and a zero ozone depleting potential (ODP). While R32
is flammable and can explode under certain conditions, there will be no risk of
burning and explosion if the air conditioner is installed correctly by a professional
installer following all instructions and safety advice in this installation manual.
Important safety precautions concerning refrigerant R32
WARNING: Combustible & Dangerous
This symbol alerts you to take care as the appliance contains
a flammable refrigerant: R32 (difluoromethane). Take extra care
when installing the unit and when carrying out maintenance.
• Do not expose the appliance to high heat, sparks and open flames. Do not
pierce or burn the appliance.
• The appliance shall be stored in a room without continuously operating
sources, such as open flames, an operating ignition gas appliance or an
operating electric heater.
• This air conditioner has been fully charged with refrigerant at the factory. Should
a recharge of refrigerant become necessary, it may only be recharged by a
professional installer.
• Maintenance must only be carried out by properly qualified, authorised
personnel. If the appliance requires maintenance or service, please contact our
after sales support centre. The maintenance technician must do a safety
inspection before carrying out any maintenance work. They must strictly
comply with all instructions in this installation manual and all relevant provisions
of gas-related local laws and regulations.
• It is necessary to operate the machine under a controlled procedure in order
to ensure that any risk arising from the combustible gas or vapour during the
operation is reduced to a minimum.
Read the
user manual
Read the
installation manual
• The room in which this air conditioner is installed must be larger than 4m2 in
size. (This air conditioner is suitable for cooling/heating a room of 10–15m2.)
Please refer to tables 1 and 2, opposite, for the total weight of the filled
refrigerant and the room area requirements.

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Installation Safety Instructions (Cont.)
Maximum charge and minimum floor area
m1= (4m3) x LFL m2= (26m3) x LFL m3= (130m3) x LFL
Where LFL is the lower flammable limit in kg/m3, the LFL for R32 is 0.306 kg/m3.
For appliances with a charge amount m1<M ≤m2:
• The maximum charge in a room shall be in accordance with the following:
mmax = 2.25 x (LFL)(5/4) x h0x (A)1/2
• The required minimum floor area Amin to install an appliance with refrigerant
charge M(kg) shall be in accordance with the following:
Amin = (MI (2.5 x (LFL)(5/4) x h0))2
Where:
• mmax is the allowable maximum charge in a room, in kg;
• Mis the refrigerant charge amount in the appliance, in kg;
• Amin is the required minimum room area, in m2;
• Ais the room area, in m2;
• LFL is the lower flammable limit, in kg/m3;
• h0is the installation height of the appliance, in metres, for calculating mmax or
Amin, 1.8m for wall-mounted.
Table 1: Maximum charge (kg): R32
LFL
(kg/m3)h0(m) Floor area (m2)
4 7 10 15 20 30 50
0.306
0.6 0.68 0.9 1.08 1.32 1.53 1.87 2.41
1 1.14 1.51 1.8 2.2 2.54 3.12 4.02
1.8 2.05 2.71 3.24 3.97 4.58 5.61 7.254
2.2 2.5 3.31 3.96 4.85 5.6 6.86 8.85
Table 2: Minimum room area (m2): R32
LFL
(kg/m3)h0(m)
Charge amount (M) (kg)
Minimum room area (m2)
1.224kg 1.836kg 2.448kg 3.672kg 4.896kg 6.12kg 7.956kg
0.306
0.6 29 51 116 206 321 543
1 10 19 42 74 116 196
1.8 3 6 13 23 36 60
2.2 2 4 9 15 24 40

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Installation Safety Instructions (Cont.)
Site and operation safety
• No open flames: The sites for installing and maintaining
an air conditioner using refrigerant R32 should be free
from open fires or welding, smoking, drying ovens or
any other heat source higher than 548°C, which easily
produces open fire.
• Ventilation necessary: The installation site should be in a
well-ventilated condition.
• Mind static electricity.
• Protective clothing and anti-static gloves must be
worn.
• Do not use a mobile phone.
Site accessibility
• Choose a site convenient for installation and maintenance.
The air inlets and outlets of both indoor and outdoor units
should not be surrounded by obstacles or close to any
hear source or combustible and/or explosive environment.
• The indoor unit inlet and outlets should be even.
• Avoid areas where there are other electrical products,
power switch plugs and sockets, kitchen cabinets, beds,
sofas or other valuable items directly underneath the
indoor unit.
Refrigerant leak
• If the indoor unit suffers a refrigerant leak during the
installation, it is necessary to immediately turn off the valve
of the outdoor unit.
• Ensure that all installation personnel leave the room until at
least 15 minutes after the refrigerant leak has been fixed.
• If the product is damaged, it must be taken back to the
maintenance station. Do not attempt to weld the refrigerant
pipe or conduct other operations on the user’s site.

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Installation Safety Instructions (Cont.)
Special tools required
Tool Requirements for use
Mini vacuum pump
It should be an explosion-proof vacuum pump that
can ensure certain precision and its vacuum degree
should be lower than 10Pa.
Filling device
It should be a special explosion-proof filling device,
have certain precision and its filling deviation should
be less than 5g.
Leak detector It should be calibrated regularly, and its annual leak
rate should not exceed 10g.
Concentration
detector
A) The maintenance site should be equipped with a
fixed-type combustible refrigerant concentration
detector and connected to a safeguard alarm
system; its error must not be more than 5%.
B) The installation site should be equipped with a
portable combustible refrigerant concentration
detector which can realise two-level audible and
visual alarm; its error must be not more than 10%.
C) The concentration detectors should be calibrated
regularly.
D) It is necessary to check and confirm the functions
before using the concentration detectors.
Pressure gauge
The pressure gauges should be calibrated regularly
(a pressure gauge used for R410A can be used for
refrigerant R32).
Fire extinguisher
It is necessary to carry fire extinguisher(s) when
installing and maintaining an air conditioner. On
the maintenance site, there should be two or more
kinds of dry powder, carbon dioxide and foam fire
extinguishers. Such fire extinguishers should be
placed at stipulated positions, with eye-catching
labels and in handy places.
After installation, the service technician must:
– Check that air cannot enter the refrigerant system
– Check for refrigerant leaks when moving the air conditioner
– Carry out a test cycle under controlled conditions after installing the unit
and record the operating data.

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• This Reverse Cycle Inverter Air Conditioner is made up of an indoor and
outdoor unit (Fig. 1 & 2), which are connected through properly insulated
copper pipes (not supplied) and an electrical connecting cable.
• The indoor unit is installed on a wall of the room to be air conditioned (it
must not be installed in a laundry or similar room with high humidity levels).
• The outdoor unit is installed outdoors on the ground, or on a wall on
suitable brackets.
Product Overview
Scope of delivery
Indoor unit
1 Front panel
2 LED display
3 Deflectors
4 Airflow direction flaps
5 Remote control
1 2
34
5
Fig. 1: Indoor unit

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NOTE:
Due to continued product improvement, images and illustrations in this manual may
vary slightly from the product purchased. All images in this manual are for reference
purposes only. Parts are not necessarily pictured to scale.
Product Overview (Cont.)
Fig. 2: Outdoor unit
Outdoor unit
6 Outdoor unit rating label
7 Terminal block cover
8 Air outlet grille
9 Gas valve
10 Liquid valve
6
7
9
10
8

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11
12
13
14
15
16
17
18
19
I
Fig. 3: Installation hardware (not to scale)
Product Overview (Cont.)
Other inclusions (not pictured)
Remote control holder
(for wall-mounting)
AAA Batteries (x2)
Instruction manual
Installation manual
Warranty certificate
Installation hardware
11 Power cable
12 Copper nuts (x4)
13 Drainage pipe
14 Sealing colloid
15 Pipe insulation (open tube)
16 Binding tape
17 Rubber mats for outdoor unit (x4)
18 Screws & plugs (x6)
19 Drainage mouth

11
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Selecting the Installation Place
PROTECT YOUR WARRANTY
These instructions for installation of the Reverse Cycle Inverter Air
Conditioner are for use by an appropriately qualified, licensed installer. The
appliance must be installed in accordance with national wiring regulations.
Do not try to install the Air Conditioner on your own; doing so will
expose you to danger and void the warranty.
• Do not install the unit
where it will be exposed
to direct sunlight.
• Do not install the unit in
a laundry room.
• Install the unit where
connection between
indoor and outdoor unit
is as easy as possible.
• Install the unit where
it is easy to drain any
condensation water.
• Observe the minimum
clearances around the
unit as stated (Fig. 4).
• Check the machine
operation regularly and
leave the necessary
spaces, as shown in
Fig. 4.
• Install the indoor unit
where the filter is easily
accessible.
Fig. 4
Minimum clearances, in mm
Mounting plate
Condensed water drain pipe
Sleeve
Insulating covering
Electrical cable
Water drain pipe
Indoor unit
• This Inverter Split System Air Conditioner is suitable for cooling or heating a
room of max. 15 square metres in size.
• Install the indoor unit level on a strong wall that is not subject to vibrations.
• The inlet and outlet ports should not be obstructed, the air should be able
to blow all over the room.
• Do not install the unit near a source of heat, steam or flammable gas.
• Install the unit near an electric socket or private circuit.

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Selecting the Installation Place (Cont.)
Outdoor unit
• Do not install the unit:
• Near sources of heat, steam or
flammable gas.
• Where it is exposed to high
winds or excessive dust.
• Where people often pass.
• Avoid installing the unit where it
will be exposed to direct sunlight
(otherwise use a protection that will
not interfere with the airflow).
• Select a place where the air
discharge and operating sound
level will not disturb neighbours.
Installation diagram (Fig. 6)
Only persons and/or companies qualified and experienced in the installation,
service and repair of refrigerant products should be permitted to do so. The
purchaser must ensure that the person and/or company who is to install,
service or repair this air conditioner has qualifications and experience in
refrigerant products.
• Leave the minimum clearances around the unit for free air circulation (Fig. 5).
• Install the outdoor unit in a safe and solid place.
• If the outdoor unit is subject to vibration, place rubber gaskets on the feet
of the unit.
Fig. 6
Pipe length is
15m max.
Pipe length is
15m max.
Height should be less than 5m
Height should be less than 5m
Fig. 5
Minimum
clearances (mm)
1000

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Installation
Installation of the indoor unit
• Before starting installation, decide on the position of the indoor and outdoor
units, taking into account the minimum space required around the units.
• Install the indoor unit in the room to be air conditioned, avoid installation in
corridors or communal areas.
Installing the mounting plate
• Use a spirit level to put the
mounting plate in a perfectly level
position vertically and horizontally.
• Drill 32mm deep holes in the wall
to fix the plate. Use a drill bit to fit
the 6mm plugs supplied.
• Insert the plastic anchors into the
hole.
• Fix the mounting plate by using the
provided tapping screws (Fig. 7).
• Check that the mounting plate is
correctly fixed.
Drilling a hole in the wall for the piping
• Decide where to drill the hole in the wall for the
piping, if necessary, according to the position of
the mounting plate.
• Install a flexible flange through the hole in the
wall to keep the latter intact and clean.
NOTE: The hole must slope downwards
towards the exterior (Fig. 8).
Keep the drain pipe down towards the direction
of the wall hole, otherwise leakage may occur.
Fig. 8

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Installation (Cont.)
Electrical connections for the indoor unit
• Lift the front panel.
• Take off the cover, as indicated (Fig. 9), by
removing a screw or breaking the hooks.
• For the electrical connections, see the circuit
diagram on the right part of the unit under
the front panel.
• Connect the cable wires to the screw
terminals by following the numbering.
Use wire of a size suitable to the electric
power input (see the unit rating plate) and
according to all current national safety code
requirements.
• The cable connecting the outdoor and indoor
units must be suitable for outdoor use.
• An efficient earth connection must be ensured.
• The appliance must be fitted with means for disconnection from the
supply mains having a contact separation in all poles that provide full
disconnection under overvoltage category III conditions, and these means
must be incorporated in the fixed wiring in accordance with the wiring rules.
• If the power cable is damaged, contact our after sales support centre for
advice on replacement.
Refrigerant piping connection
• The piping can be run in the three directions,
as indicated by the numbers 1 to 3 in Fig. 10.
When the piping is run in directions 1 or 3, cut
a notch along the groove on the side of the
indoor unit with a cutter.
• Run the piping in the direction of the wall
hole and bind the copper pipes, the drain
pipe and the power cables together with
tape at the bottom.
Fig. 10
View from rear
Terminal block
cover
Fig. 9
Wiring diagram
Front panel

15
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Installation (Cont.)
Connecting the pipes
• Do not remove the cap from the pipe until connecting it, to avoid dampness
or dirt from entering.
• If the pipe is bent or pulled too often,
it will become stiff. Do not bend it
more than three times at one point.
• When extending rolled pipe,
straighten the pipe by unwinding it
gently, as illustrated (Fig. 11).
Connections to the indoor unit
• Remove the indoor unit pipe cap and check that
there is no debris inside.
• Insert the nut and create a flange at the extreme
end of the connection pipe.
• Tighten the connections by using two wrenches
working in opposite directions (Fig. 12).
• For R32 refrigerant, mechanical connectors
should be outdoors.
Water drainage from the indoor unit
The condensed water drainage from the indoor unit is fundamental for the
success of the installation.
• Place the drain hose below the piping,
taking care not to create siphons.
• The drain hose must slant down-
wards to aid drainage (Fig. 13).
• Do not bend the drain hose or leave
it protruding or twisted and do
not put the end of it in water. If an
extension is connected to the drain
hose, ensure that it is lagged when it
passes into the indoor unit.
• If the piping is installed to the right,
the pipes, power cable and drain
hose must be lagged and secured
onto the rear of the unit with a pipe
connection.
1) Insert the pipe connection into the
relative slot.
2) Press to join the pipe connection
to the base.
Fig. 11
Torque
wrench
Fig. 12
Fig. 13

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Installation (Cont.)
After having connected the pipe according to the instructions, install the
connection cables, then the drain pipe (Fig. 14). After connection, lag the
pipe, cables and drain pipe with the insulating material.
• Arrange the pipes, cables and drain hose well.
• Lag the pipe joints with insulating material, securing it with vinyl tape.
• Run the bound pipe, cables and drain pipe through the wall hole and mount
the indoor unit onto the upper part of the mounting plate securely.
• Press and push the lower part of the indoor unit tightly against the
mounting plate.

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Installation (Cont.)
Installation of the outdoor unit
• The outdoor unit should be installed on a solid wall, or on the ground, and
fastened securely.
• Before connecting pipes and cables, decide on the best position on the
wall, leaving enough space for easy maintenance.
• Fasten the support to the wall using screw anchors that are particularly
suited to the type of wall.
• Use the largest size wall anchors that will suit the size and weight of the
unit, keeping in mind that the mounting will need to support the weight and
vibration of the unit for many years to come, without loosening.
• The unit must be installed following all relevant local regulations.
Water drainage from the outdoor unit
Condensed water and ice formed in the outdoor unit while in heating mode
Fig. 15
can be drained away through a drain
pipe.
• Fasten the drain port in the 25mm
hole placed in the part of the unit, as
illustrated (Fig. 15).
• Connect the drain port and the drain
pipe.
• Make sure that water is drained into a
suitable place.
Electrical connections
• Take off the cover.
• Connect the cable wires to the
terminal board using the same
numbering as in the indoor unit.
• For the electrical connections, see
the wiring diagram on the back of the
cover (Fig. 16).
• Fasten the cables with a cable clamp.
• An efficient earth connection must be
ensured.
• Replace the cover.
Drain port Drain pipe

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Installation (Cont.)
Connecting the pipes
Screw the flare nuts to the outdoor unit coupling with the same tightening
procedures described for the indoor unit. To avoid leakage, pay attention to
the following points:
• Tighten the flare nuts using two
wrenches, taking care not to
damage the pipes (Fig. 17).
• If the tightening torque is not
sufficient, there will probably be
some leakage. With excessive
tightening torque there may also
be some leakage, as the flange
could be damaged.
• The best way to tighten the
connections is using a fixed
wrench and a torque wrench, as
illustrated in Fig. 12 on page 15.
Bleeding
Air and humidity left inside the
refrigerant circuit can cause
compressor malfunction. After
having connected the indoor
and outdoor units, bleed the air
and humidity from the refrigerant
circuit by using a vacuum pump
(Fig. 18). Detailed instructions
follow on the next page.
Fig. 17
Connection pipes
Flare nuts
Liquid tap
Gas tap
Liquid valve
Indoor unit
Gas valve
Protection caps
Service port nut
Fig. 18
Service port Vacuum pump

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Installation (Cont.)
Proceed as illustrated in Fig. 19 and Fig. 20 below:
• Unscrew and remove the caps from the 2-way and 3-way valves.
• Unscrew and remove the cap from the service port.
• Connect the vacuum pump hose to the service port.
• Operate the vacuum pump for 10 - 15 minutes until an absolute vacuum
of 10mm Hg has been reached.
• With the vacuum pump still in
operation, close the low-pressure
knob on the vacuum pump
coupling. Stop the vacuum pump.
• Open the 2-way valve by ¼ turn
and then close it after 10 seconds.
Check all the joints for leaks using
liquid soap or an electronic leak
device.
• Turn the body of the 2-way and
3-way valves. Disconnect the
vacuum pump hose.
• Replace and tighten
all the caps on the
valves.
Fig. 19 3-Way valve diagram
Connect to indoor unit
Open position
Spindle
Needle
Service port cap
Fig. 20
Refrigerant flow direction
3-Way valve
2-Way valve
Valve cap
Refrigerant pressure inspection
The low pressure range of refrigerant R32 is 0.8–1.2MPa and the high
pressure range is 3.2–3.7MPa. This means that the refrigerating system or
refrigerant of an air conditioner is abnormal if the low or high pressure ranges
of the detected compressor exceed the normal ranges.

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Installation (Cont.)
Final stage
• Wind insulating covering around
the joints of the indoor unit and
fix it with insulating tape
(Fig. 21).
• Fix the exceeding part of the
signal cable to the piping or to
the outdoor unit.
• Fix the piping to the wall (after
having coated it with insulating
tape) using clamps, or insert
them into plastic slots.
• Seal the hole in the wall through
which the piping is passed so
that no air or water can enter.
Indoor unit test
• Does the ON/OFF switch work properly?
• Do the HEATING, COOLING and FAN modes operate normally?
• Do the TIMER-ON and TIMER-OFF functions operate properly?
• Does each indicator light work properly?
• Do the flaps for air flow direction operate normally?
• Is the condensed water drained regularly?
Outdoor unit test
• Is there any abnormal noise or vibration during operation?
• Could the noise, airflow or condensed water drainage disturb the
neighbours?
• Is there any coolant leakage?
NOTE: The electronic controller allows the compressor to start only three
minutes after voltage has reached the system.
Fig. 21
Insulating
Insulating
Piping
Piping
Gasket
(Outdoor)(Indoor)