Aisin GHP AXAP22PAD User manual

AXAP22-71 PAD
Always read before installation.
Applicable models
AXAP22PAD AXAP45PAD
AXAP28PAD AXAP56PAD
AXAP36PAD AXAP71PAD
Important reminder
- THOROUGHLY READ THESE INSTRUCTIONS BEFORE STARTING THE INSTALLATION AND FOLLOW
ALL PROCEDURES DESCRIBED WITHIN.
- KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE.
After installation, always use the checklist to perform a final inspection.
INSTALLATION AND MAINTENANCE INSTRUCTIONS
[ Model ] Wall-mounted Type
Aisin INDOOR UNITS

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AXAP22PAD
AXAP28PAD
AXAP36PAD
AXAP45PAD
AXAP56PAD
AXAP71PAD Gasdrivenheatpumpsairconditioners
CONTENTS
Installation
manual
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
SAFETY PRECAUTIONS...............................................................................................1
BEFORE INSTALLATION ..............................................................................................2
SELECTING INSTALLATION SITE................................................................................5
INDOOR UNIT INSTALLATION .....................................................................................6
REFRIGERANT PIPING WORK ....................................................................................9
DRAIN PIPING WORK .................................................................................................12
ELECTRIC WIRING WORK .........................................................................................13
HOW TO CONNECT WIRINGS AND WIRING EXAMPLE ...........................................14
FIELD SETTINGS ........................................................................................................19
TEST OPERATION ......................................................................................................20
1. SAFETY PRECAUTIONS
Pleaseread these "SAFETY PRECAUTIONS"carefully before installingair conditioningunit and be sure to
install it correctly.
After completing installation, conduct a trial operation to check for faults and explain to the customer how to
operate the air conditioner and take care of it with the aid of the operation manual. Ask the customer to store the
installation manual along with the operation manual for future reference.
This air conditioner comes under the term "appliances not accessible to the general public".
Safety Precaution
This unit is a class A product. In a domestic environment this product may cause radio interference in which case
the user may be required to take adequate measures.
Meaning of WARNING and CAUTION notices
WARNING .........Failure to follow these instructions properly may result in personal injury or loss of life.
CAUTION ..........Failure to observe these instructions properly may result in property damage or per-
sonal injury, which may be serious depending on the circumstances.
WARNING
•Ask your dealer or qualified personnel to carry out installation work.
Do notattempttoinstall theair conditioner yourself.Improperinstallationmayresultinwaterleakage,electricshocks
orfire.
•Install the air conditioner in accordance with the instructions in this installation manual.
Improper installation may result in water leakage, electric shocks or fire.
•Consult your local dealer regarding what to do in case of refrigerant leakage. When the air conditioner is to
be installed in a small room, it is necessary to take proper measures so that the amount of any leaked refrig- erant
does not exceed the concentration limit in the event of a leakage. Otherwise, this may lead to an accident due to
oxygen depletion.
•Be sure to use only the specified accessories and parts for installation work.
Failure to use the specified parts may result in the unit falling, water leakage, electric shocks or fire.
•Install the air conditioner on a foundation strong enough to withstand the weight of the unit.
A foundation of insufficient strength may result in the equipment falling and causing injury.
•Carry out the specified installation work after taking into account strong winds, typhoons or earthquakes.
Failure to do so during installation work may result in the unit falling and causing accidents.
English 1

•Make sure that a separate power supply circuit is provided for this unit and that all electrical work is carried
out by qualified personnel according to local laws and regulations and this installation manual.
An insufficient power supply capacity or improper electrical construction may lead to electric shocks or fire.
•Makesure that all wiring issecured, the specified wires are used, and thatthere is no strain on the terminal
connections or wires.
Improper connections or securing of wires may result in abnormal heat build-up or fire.
•When wiring the power supply and connecting the wiring between the indoor and outdoor units, position the
wires so that the control box cover can be securely fastened.
Improper positioning of the control box cover may result in electric shocks, fire or the terminals overheating.
•If refrigerant gas leaks during installation, ventilate the area immediately.
Toxic gas may be produced if the refrigerant comes into contact with fire. •After
completing installation, check for refrigerant gas leakage.
Toxic gas may be produced if the refrigerant gas leaks into the room and comes into contact with a source of fire,
such as a fan heater, stove or cooker.
•Be sure to switch off the unit before touching any electrical parts.
•Donotdirectlytouchrefrigerantthathasleakedfromrefrigerantpipesorotherareas,asthereisadangeroffrostbite.•Be
sure to earth the air conditioner.
Do not earth the unit to a utility pipe, lightning conductor or telephone earth lead. Imperfect earthing may result
in electric shocks or fire.
A high surge current from lightning or other sources may cause damage to the air conditioner.
•Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in electric shocks or fire.
CAUTION
•While following the instructions in this installation manual, install drain piping to ensure proper drainage and
insulate piping to prevent condensation.
Improper drain piping may result in indoor water leakage and property damage.
•Install the indoor and outdoor units, power cord and connecting wires at least 1 meter awayfrom televisions
or radios to prevent picture interference and noise.
(Depending on the incoming signal strength, a distance of 1 meter may not be sufficient to eliminate noise.)
•Remote controller (wireless kit) transmitting distance can be shorter than expected in rooms with electronic
fluorescent lamps (inverter or rapid start types).
Install the indoor unit as far away from fluorescent lamps as possible.
•Do not install the air conditioner in the following locations:
1. Where there is a high concentration of mineral oil spray or vapour (e.g. a kitchen).
Plastic parts will deteriorate, parts may fall off and water leakage could result.
2. Where corrosive gas, such as sulphurous acid gas, is produced.
Corroding of copper pipes or soldered parts may result in refrigerant leakage.
3. Near machinery emitting electromagnetic radiation.
Electromagneticradiationmaydisturb theoperationofthecontrolsystemandresultinamalfunctionoftheunit.
4. Where flammable gas may leak, where there is carbon fibre or ignitable dust suspensions in the air, or
where volatile flammables such as paint thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.
•The air conditioner is not intended for use in a potentially explosive atmosphere.
2. BEFORE INSTALLATION
Do not exert pressure on the resin parts when opening the unit or when moving it after opening
Be sure to check the type of R410A refrigerant to be used before doing any work. (Using an incorrect
refrigerant will prevent normal operation of the unit.)
•When opening the unit or moving it after opening, be sure to lift it by holding on to the lifting lugs without
exerting any pressure on other parts, especially, drain piping, and other resin parts. •
Decide upon a line of transport.
•Leave the unit inside its packaging while moving, until reaching the installation site. Use a sling of soft mate-
rial, where unpacking isunavoidable or protective plates together with a rope when lifting, to avoid damage or
scratches to the unit.
•Especially, do not unfasten packing case(top) guarding the control box until suspending the unit. •
Refer to the installation manual of the outdoor unit for items not described in this manual. •Do not dispose of any
parts necessary for installation until the installation is complete.
2 English

2-1 PRECAUTIONS
•Be sure to read this manual before installing the indoor unit.
•When selecting installation site, refer to the installation pattern.
•This unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial
environment. If installed as a household appliance it could cause electromagnetic interference.
•Entrust installation to the place of purchase or a qualified serviceman. Improper installation could lead to
leaks and, in worse cases, electric shock of fire.
•Use only parts provided with the unit or parts satisfing required specifications. Unspecified parts could
cause the unit to fall out of place, or could lead to leaks and, in worse cases, electric shock or fire.
•Do not install or operate the unit in rooms mentioned below.
•Laden with mineral oil, or filled with oil vapor or spray like in kitchens. (Plastic parts may
deteriorate which could eventually cause the unit to fall out of place, or could lead to leaks.)
•Where corrosive gas like sulfurous gas exists. (Copper tubing and brazed spots may corrode,
which could eventually lead to refrigerant leaks.)
•Where volatile flammable gas like thinner or gasoline is used.
•Where exposed to combustible gases and where voltatile flammable gas like thinner or gasoline
is used. (Gas in the vicinity of the unit could ignite.)
•Where machines can generate electromagnetic waves. (Control system may malfunction.)
•Where the air contains high levels of salt such as that near the ocean and where voltage
fluctuates greatly such as that in factories. Also in vehicles or vessels.
2-2 ACCESSORIES
Check the following accessories are included with your unit.
Name (1) Installation
panel (2) Attachment screws for the installation panel
8 pcs. →AXAP22,28,36type
(3) Paper pattern
for installation (4) Insulating tape
Quantity
Shape
1set 9 pcs.→AXAP45,56,71type
M4×25L
1pc. 1pc.
Name (5) Clamp (6) Securing screws
Quantity 1 large 3 small 2pcs.
(Other)
•Operation manual
Shape •Installation manual
M4×12L
2-3 OPTIONAL ACCESSORIES
•These are two types of remote controllers: wired and wireless. Select a remote controller according to
customer request and install in an appropriate place.
Remote controller type Model
Wired type BRC1C517 · *ABRC1D528· *BRC1E51A7
Heat pump type BRC7E618
Wirelesstype Cooling only type BRC7E619
* Refer to installation manual attached to the remote controller.
NOTE
•If the customer wishes to use a remote controller that is not listed above, select a suitable remote
controller after consulting catalogs and technical materials.
English 3
BRC7E61

FOR THE FOLLOWING ITEMS, TAKE SPECIAL CARE DURING CONSTRUCTION AND
CHECK AFTER INSTALLATION IS FINISHED.
a. Items to be checked after completion of work
Items to be checked
Are the indoor and outdoor unit fixed
firmly?
Is the outdoor unit fully installed?
Is the gas leak test finished?
Is the unit fully insulated?
Does drainage flow smoothly?
Does the power supply voltage correspond
to that shown on the name plate?
Are wiring and piping correct?
Is the unit safely grounded?
Is wiring size according to specifications?
Is something blocking the air outlet or inlet
of either the indoor or outdoor units?
Are refrigerant piping length and additional
refrigerant charge noted down?
b. Items to be checked at time of delivery
Alsoreviewthe"SAFETYPRECAUTIONS"
Items to be checked
If not properly done, what is likely to occur
The units may drop, vibrate or make noise.
The unit may malfunction or the compo-
nents burn out.
It may result in insufficient cooling.
Condensate water may drip.
Condensate water may drip.
The unit may malfunction or the compo-
nents burn out.
The unit may malfunction or the compo-
nents burn out.
Dangerous at electric leakage.
The unit may malfunction or the compo-
nents burn out.
It may result in insufficient cooling.
The refrigerant charge in the system is not
clear.
Check
Check
Are the control box cover, air filter, suction grille attached?
Did you explain about operations while showing the instruction manual to your customer?
Did you hand the instruction manual over to your customer?
c. Points for explanation about operations
Theitemswith WARNINGand CAUTION marks in the instruction manual are the items pertaining
to possibilities for bodily injury and material damage in addition to the general usage of the product.
Accordingly, it is necessary that you make a full explanation about the described contents and also ask your
customers to read the instruction manual.
2-4 NOTE TO THE INSTALLER
Be sure to instruct customers how to properly operate the unit (especially cleaning filters, operating different
functions, and adjusting the temperature) by having them carry out operations themselves while looking at the
manual.
4 English

3. SELECTING INSTALLATION SITE
(1) Select an installation site where the following conditions are fulfilled and that meets with your
customer'sapproval.
• In the upper space (including the back of the ceiling) of the indoor unit where there is no possible
dripping of water from the refrigerant pipe, drain pipe, water pipe, etc.
•
Where the wall is strong enough to bear the indoor unit weight.
• Where sufficient clearance for installation and maintenance can be ensured.
(Refer to Fig. 1 and Fig. 2)
• Where optimum air distribution can be ensured. •
Where nothing blocks the air passage.
• Where condensate can be properly drained.
• Where the wall is not significantly tilted. • Where
not exposed to combustible gases.
• Where pipe between indoor and outdoor units is possible within the allowable limit.
(Refer to the installation manual of the outdoor unit.)
• Install the indoor and outdoor units, power cable and transmission wiring, at least 1 m from TVs and
radios, to prevent distorted pictures and static. (Depending on the type and source of the electrical
waves, static may be heard even when more than 1 m away.)
• Install the indoor unit no less than 2.5 m above the floor.Where unavoidably lower, take what measures
are necessary to keep hands out of the air inlet.
• Where the cool (warm) air reaches all across the room.
[ Space required for installation (mm) ]
≥50 ≥50
Fig.1
Obstruction
≥2500(fromfloor)
For installation
in high places.
Floor
≤120
Fig.2
CAUTION
• The indoor and outdoor units and the power supply wiring and remote controller cord must be installed at
least 1m away from any televisions or radios. This is to prevent interference with picture and sound recep-
tion. (Interference may occur even at 1m away depending on the reception quality.)
• If installing the wireless kit, the distance of the signal sent from the remote controller might be shorter if
there are fluorescent lights which are electrically started (such as with inverters, rapid starters, etc.) in the room.
The indoor unit should be installed as far away from fluorescent lights as possible.
(2) Consider whether the place where the unit will be installed can support the full weight of the unit,
and reinforce it with boards and beams, etc. if needed before proceeding with the installation. Also,
reinforce the place to prevent vibration and noise before installing.
(The installation pitch can be found on the paper pattern for installation (3), so refer to it when con-
sidering the necessity for reinforcing the location.)
(3) The indoor unit may not be directly installed on the wall. Use the attached installation panel (1)
before installing the unit.
English 5
≥
90
≥
30

4. INDOOR UNIT INSTALLATION
• Use only accessories and parts which are of the designated specification when installing.
CAUTION
• Install so that the unit does not tilt to either side or forward.
• Do not hold the unit by the horizontal flaps when lifting it. (This may damage the horizontal flaps.)
(1) Open the piping through-hole.
• The refrigerant pipe and drain pipe can be passed out in one of 6 directions: left, bottom-left, back-left,
right, bottom-right, and back-right. (Refer to Fig. 3)
• Using the paper pattern for installation (3), choose where to pass the piping out and open a through-hole
(φ80)inthewall.
Open the hole so that there is a downward slope for the drain piping. (See " 6.DRAIN PIPING WORK ")
(2) Remove the installation panel (1) from the unit and attach to the wall.
(The installation panel is temporarily attached to the unit with screw. (In case of 22-36 type)
(Refer to Fig. 3)
(a) Check the location for the hole using the included paper pattern for installation (3).
• Choose a location so that there is at least a 90 mm gap between the ceiling and the main unit.
(b) Temporarily attach the installationpanel (1) at the temporary-securing position on the paper pattern for
installation (3) and use a level to make sure the drain hose is either level or tilted slightly downward.
(c) Secure the installation panel (1) to the wall using either screws or bolts.
• If using the attachment screws for the installation panel (2), attach using at least 4 screws on either
side (for a total of 8 screws (22-36 type), 9 screws (45-71 type)) of the recommended installation cleat
position on the included paper pattern for installation (3).
• If using bolts, attach using a M8 - M10 bolt (for a total of 2 bolts) on either side. • If
dealing with concrete, use commercially available foundation bolts (M8 - M10).
(3) If using the left, bottom-left, right, or bottom-right positions for the piping, cut out the through-hole
for the piping in the front grill. (Refer to Fig. 4)
Installationpanel(1)
Temporaryscrew
(Incaseof20-32type) Frontgrill
Leftpipe
Cutoutalong
thegroove.
Back-leftpipe
Fig.3 Rightpipe Bottom-rightpipe
Bottom-leftpipe
Back-rightpipe Cutaway
Fig.4
(4) Remove the front panel and the service lid. (Refer to Fig. 5)
< How to remove the front panel and service lid > (1) Open
the front panel to the point where it stops.
(2) Push the axes on either side of the front panel towards the center of the main unitand remove. (You can
also remove it by sliding the front panel either to the left or right and pulling it forward.)
6 English

(3) Remove the screw from the service lid and pull the handle forward.
Front panel
Axis (1) Service lid
Axis
(2) (2)
(3)
Handle
Axis Screw
Fig.5
(5) Point the pipe in the direction it will be passed out.
For right, bottom-right, and back-right piping (Refer to Fig. 6)
• Wrapthedrainhoseandtherefrigerantpipingtogetherwiththeinsulat-
ingtape(4)so thatthedrainhoseisbelowtherefrigerantpiping.
For left, bottom-left, and left-back piping
• Remove the front grill. (Refer to Fig. 7)
< How to remove the front grill >
Remove the front grill as described below when securing the indoor unit
with screws or when attaching Optional Accessories (wireless remote
controller, adapter PC board, etc.).
(1) Remove the front panel.
Fig.6
Insulating tape (4)
Refrigerant piping
Drain hose
(2) Remove the screws (2 places in case of AXAP22,28,36 type/3 places in case of AXAP45,56,71 type)
securing the front grill.
(3) Remove the tabs (3 places) securing the front grill by pushing them in the direction of the arrows.
(4) Making sure not to catch the horizontal flaps, remove the front grill by pulling in the direction of the arrow.
Tabposition Tabposition Tab
(3)
(2)
(3)
Screw position
(2)
(3)
(2)
Frontgrill
Fig.7
(4)
Screw position (In case of AXAP45,56,71 type)
• Remove the drain plug, the insulation tubing, and the drain hose from the drain pan and replace.
(Refer to Fig. 8)
• Connect the local refrigerant piping ahead of time, matching it to the liquid pipe and gas pipe marks
engraved on the installation panel (1).
< Replacing the drain hose and drain plug >
(1) Remove the drain plug and insulation tubing.
(2) Remove the drain hose and replace onto the left side.
(3) Replace the drain plug and the insulation tubing onto the right side.
English 7
Axis
Axis Service lid
Fig.5

Insulating tube
Makesure
there are
nogaps.
Fig.8
Drain plug
Do not place lubricant (refrigerant oil) when inserting.
This may cause deterioration and water leaks.
Insert using a hexagon wrench (4mm).
(6) Hook the indoor unit onto the installation panel. (Refer to Fig. 9)
• Placing buffering material between the wall and the indoor unit at this time will make work easier.
Servicelid Hook the indoor unit hook onto the installation panel (1).
Front panel Front grill Place buffering material
Be sure to pass all wires through
the wiring guide.
Refrigerant piping Tab
Wall
(There are 2 places.)
Wiring (locally procured) Installation panel
(accessory) (1)
Powersupplywiring,Transmissionwiring,Groundwiring,
Remotecontrollerwiring Fig.9
For right, bottom-right, and back-right piping
• Pass the drain hose and the refrigerant piping to the wall.
(7) Pass power supply wiring, transmission wiring, ground wiring, and remote controller wiring
through the wiring guide in through the back of the indoor unit and to the front.
(8) Connect the piping. (See "5.REFRIGERANT PIPING WORK" and Fig. 10)
Power supply wiring and
ground wiring
Refrigerant piping
Secure with
vinyl tape.
Drain hose Transmission wiring and
Wiring
Refrigerant piping Aarrow view
remote controller wiring
Seal with putty corking
material.
Fig.10
Wrap the insulating tape overlapping at least half the width with
eachwrap.
Wrap the insulating tape all the way to the L-shaped bend.
8 English
Wall
A

• To avoid the influence of noise from the power supplyline on the transmission wiring and the remote
controllerwiring,thesewiringsmustbekeptasfaraspossiblefromthepower/groundwirings.Asshowninthefigure,
keepthepowersupplywiringand theground wiring together.Keepthetransmissionandremote con-
troller wirings together and route them maintaining a good distance from the power supply/groundwirings
(thatis,onthe othersideof thepowersupply/ground wirings).Then,fix them securelyon therefrigerantpipe.
• Seal the piping through-hole with putty corking material.
(9) Push on both bottom edges of the indoor unit using both hands and hook the tab on the back of
the indoor unit onto the installation panel (1). (Refer to Fig. 9)
• At
this time remove the buffering material placed in step (6).
• Make sure power supply wiring, transmission wiring, ground wiring and remote controller wiring are not
caught inside the indoor unit.
When screwing in the indoor unit
• Remove the front grill. (Refer to Fig. 7)
• Secure the indoor unit to the installation panel (1) with the securing
screws (6). (Refer to Fig. 11)
5. REFRIGERANT PIPING WORK
Fig.11
Installationpanel
(accessory)(1)
Refrigerantpiping
Insulatingtape
(accessory)(4)
M4×12L
(accessory)(6)
ۃFor refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.ۄ
ۃExecute heat insulation work completely on both sides of the gas piping and the liquid piping.
Otherwise, a water leakage can result sometimes.ۄ
(When using a heat pump, the temperature of the gas piping can reach up to approximately 120°C, so use
insulation which is sufficiently resistant.)
ۃAlso, in cases where the temperature and humidity of the refrigerant piping sections might exceed
30°C or RH80 %, reinforce the refrigerant insulation. (20 mm or thicker) Condensation may form on the
surface of the insulating material.ۄ
ۃBefore refrigerant piping work, check which type of refrigerant is used. Proper operation is not pos-
sible if the types of refrigerant are not the same.ۄ
CAUTION
• Use a pipe cutter and flare suitable for the type of refrigerant.
• Apply ester oil or ether oil around the flare section before connecting.
• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the end
or cover it with tape.
• Do not allow anything other than the designated refrigerant to get mixed into the refrigerant
circuit, such as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room
thoroughly right away.
• Do not mix air or other gas with the specified refrigerant in the refrigeration cycle.
• Ventilate the room if refrigerant gas leaks during the work.
• The outdoor unit is charged with refrigerant.
• Use copper alloy seamless pipes (ISO 1337)
English 9

• Be sure to use both a spanner and torque wrench together, as shown
in the drawing, when connecting or disconnecting pipes to/from the
unit. (Refer to Fig. 12)
• Refer to "Table 1" for the dimensionsof flare nut spaces.
• When connecting the flare nut, coat the flare section (both inside and
outside) with ester oil or ether oil, rotate three or four times first, then
screw in. (Refer to Fig. 13)
• Keep all the screw mounting resin parts (e.g., piping presser
plates) away from oil.
If oil adheres, the strength of the screwmounting resin parts may drop.
CAUTION
• Over-tightening may cause the flare nuts to crack or the refrigerant
toleak.
NOTE
• Use the flare nut included with the unit main body.
Table1
Tightening torque
Torque wrench
Spanner
Piping union
Flare nut
Fig.12
Apply ester oil or
ether oil only inside
Fig.13
Pipesize Flare dimensions A (mm) Flare
φ6.4(1/4") 14.2 -17.2 8.7- 9.1
φ9.5(3/8") 32.7 -39.9 12.8 -13.2
R0.4-0.8
φ12.7(1/2") 49.5 -60.3 16.2 -16.6
φ15.9(5/8") 61.8 -75.4 19.3 -19.7
• Refer to Table 1 to determine the proper tightening torque.
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install the unit without a torque wrench, you may
follow the installation method mentioned below.
After the work is finished, make sure to check that there is no gas leak.
When you keep on tightening the flare nut with a spanner, there is a point where the tightening torque
suddenly increases. From that position, further tighten the flare nut the angle shown below:
Table2
Pipesize
φ6.4(1/4")
φ9.5(3/8")
φ12.7(1/2")
φ15.9(5/8")
Further tightening angle
60 - 90 degrees
60 - 90 degrees
30 - 60 degrees
30 - 60 degrees
Recommended arm length of tool
Approx.150mm
Approx.200mm
Approx.250mm
Approx.300mm
After the work is finished, make sure to check that there is no gas leak.
CAUTION
CAUTION TO BE TAKEN WHEN BRAZING REFRIGERANT PIPING
"Do not use flux when brazing refrigerant piping. Therefore, use the phosphor copper brazing filler metal
(BCuP-2: JIS Z 3264/B-Cu93P-710/795: ISO 3677) which does not require flux."
(Flux has extremely harmful influence onrefrigerant piping systems. For instance, if the chlorine based flux is used,
it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will damage the refrigerant oil.)
10 English
45
0±
2
0
90
0
±
A
Pipe size
(Nm) Tightening torque Flare dimensions (mm)

• Before brazing local refrigerant piping, nitrogen gas shall be blown through the piping to expel air from the
piping.
If your brazing is done without nitrogen gas blowing, a large amount of oxide film develops inside the piping, and
could cause system malfunction.
• When brazing the refrigerant piping, only begin brazing after having carried out nitrogen substitution or
while inserting nitrogen into the refrigerant piping. Once this is done, connect the indoor unit with a flared or a
flanged connection.
• Nitrogen should be set to 0.02 MPa with a pressure-reducing valve if brazing while inserting nitrogen into
the piping. (Refer to Fig.14)
Pressure-reducing valve
Refrigerant piping Part to be
brazed
Nitrogen
Taping
hands valve
Nitrogen Fig.14
CAUTION
Be sure to insulate anyfield piping all the way to the piping connection inside the unit. Anyexposed piping
may cause condensation or burns if touched.
• After checking for gas leaks, be sure to insulate the pipe connections using the supplementary piping
insulation tubing and insulating tape (4). The insulating tape (4) should be wrapped from the L-shaped bend
all the way to the end inside the unit. (Refer to Fig. 15)
Insulatin
Indoorunitpipinginsulationtubing
Insulatingtubingtape
Fig.15
Be sure to insulate anyfield piping all the way to the piping connection inside the unit. Anyexposed piping
may cause condensation or burns if touched.
English 11
Insulating tubing tape
Clamping material
large (accessory) (5)
Insulating tubing tape
Insulating tubing tape
Local piping
Indoor unit piping
Indoor unit piping insulation tubing
CAUTION
See “4. INDOOR UNIT
INSTALLATION”
Insulating tape
(accessory) (4)
Start wrapping
L-shaed
bend
Indoor unit piping insulation tubing
Insulating tubing seam
Attach the insulation
tubing tape so that there
are no gaps in the
insulation tubing seam

6. DRAIN PIPING WORK
(1) Install the drain piping. (Refer to Fig. 16)
• The drain pipe should be short with a downward slope and should prevent air pockets from forming. •
Watch out for the points in the Fig. 16 when performing drain work.
Makesurethedrain
hoseisatadownward
slope.
Makesurethetipdoes
notgounderwatereven
whenwaterisadded. Fig. 16
Drainhose
(Downward
slope)
Drainhose
• When extending the drain hose, use a commercially available drain extension hose, and be sure to
insulate the extended section of the drain hose which is indoors. (Refer to Fig. 17)
Indoorunitdrainhose
Extensiondrainpiping
(commerciallyavailable)
Insulatingtube
(commerciallyavailable) Insulatingtape(accessory)(4)
(See"4.INDOORUNITINSTALLATION") Fig. 17
• Make sure the diameter of the piping is the same as the piping (hard vinyl chloride, nominal diameter
13mm) or bigger.
• When directly connecting a hard vinyl chloride pipe joint (nominal diameter 13mm) to the drain hose
connected to the indoor unit (i.e. for embedded piping, etc.), use a commercially available hard vinyl
chloride pipe joint (nominal diameter 13mm). (Refer to Fig. 18)
Drain hose connected Commerciallyavailable Commerciallyavailableto
the indoor unit hardvinylchloridepipe hardvinylchloridepipe
joint(nominaldiameter13mm) (nominaldiameter13mm) Fig.18
(2) Make sure the drain works properly.
• After drain work is complete, perform a drain
check by opening the front panel, removing
the air filter, pouring water into the drain
pan, and making sure water flows smoothly
out of the drain hose. (Refer to Fig. 19)
Plastic container
for pouring
CAUTION
• Drain piping connections
Fig.19
Drainpan
Make sure not to splash the water.
Do not connect the drain piping directly to sewage pipes that smell of ammonia. The ammonia in the
sewage might enter the indoor unit through the drain pipes and corrode the heat exchanger.
• Keep in mind that it will become the cause of getting drain pipe blocked if water collects on drain pipe.
12 English

7. ELECTRIC WIRING WORK
7-1 GENERAL INSTRUCTIONS
• All field supplied parts and materials and electric works must conform to local codes.
• Use copper wire only.
• For electric wiring work, refer to also "WIRING DIAGRAM" attached to the unit body.
• For remote controller wiring details, refer to the installation manual attached to the remote controller.
• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each indoor unit as unit A, unit B..., and be sure the
terminal board wiring to the outdoor unit and BS unit are properly matched. If wiring and piping between the
outdoor unit and an indoor unit are mismatched, the system may cause a malfunction.
• A circuit breaker capable of shutting down power supply to the entire system must be installed.
• Refer to the installation manual attached to the outdoor unit for the size of power supply wiring connected
to the outdoor unit, the capacity of the circuit breaker and switch, and wiring instructions.
• Be sure to ground the air conditioner.
• Do not connect the ground wire to gas pipes, water pipes, lightning rods, or telephone ground wires.
• Gas pipes: might cause explosions or fire if gas leaks.
• Water pipes: no grounding effect if hard vinyl piping is used.
• Telephone ground wires or lightning rods: might cause abnormally high electric potential in the ground
during lighting storms.
7-2 ELECTRICAL CHARACTERISTICS
Units Power supply Fanmotor
Model
AXAP22PAD
AXAP28PAD
AXAP36PAD
AXAP45PAD
AXAP56PAD
AXAP71PAD
Hz
50
Volts
220-240
Voltage range
Max.264
Min. 198
MCA
0.3
0.4
0.4
0.4
0.5
0.6
MFA
16
16
16
16
16
16
kW
0.040
0.040
0.040
0.043
0.043
0.043
FLA
0.2
0.3
0.3
0.3
0.4
0.5
MCA: Min. Circuit Amps (A); MFA: Max. Fuse Amps (A)
kW: Fan Motor Rated Output (kW); FLA: Full Load Amps (A)
7-3 SPECIFICATIONS FOR FIELD SUPPLIED FUSES AND WIRE
Power supply wiring Remote controller wiring
Transmission wiring
Model
AXAP22PAD
AXAP28PAD
AXAP36PAD
AXAP45PAD
AXAP56PAD
AXAP71PAD
Field fuses
16A
Wire
H05VV-U3G
Size
Wire size and
lengthmust
complywith
local codes.
Wire
Vinylcordwith
sheathorcable
(2wire)
Size
0.75 - 1.25 mm
2
Allowable length of transmission wirings and remote controller wiring are as follows.
(1) Outdoor unit - Indoor unit: Max. 1000m (Max. wiring length: 2000m)
(2) Indoor unit - Remote controller: Max. 500m
NOTE
1. Shows only in case of protected pipes. Use H07RN-F in case of no protection.
2. Vinyl cord with sheath or cable (Insulated thickness : 1mm or more)
English 13

CAUTION
• Arrange the wires and fix a lid firmly so that the lid does not float during wiring work.
• Do not clamp remote controller wiring and transmission wiring together with power supply wiring. Doing so
may cause malfunction.
• Remote controller wiring and transmission wiring should be located at least 50 mm from power supply wir-
ing. Not following this guideline may result in malfunction due to electrical noise.
8. HOW TO CONNECT WIRINGS AND WIRING EXAMPLE
8-1 HOW TO CONNECT WIRINGS
Methods of wiring power supply, units and connecting remote controller wiring
• Power supply wiring and ground wire
Unscrew and remove the service lid.
Connect the power supply wiring and ground wiring to the power supply terminal block (3P).
When doing this, tie the power supply wiring and the ground wiring using the included clamp (small) (5) and then
firmly secure using the included clamp (small) (5) according to the figure.
(Refer to Fig. 21)
• Transmission wiring and remote controller wiring
Unscrew and remove the service lid.
Connect the remote controller wiring and the transmission wiring to the terminal block (6P).
When doing this, tie the remote controller wiring and the transmission wiring using the included clamp (small)
(5) and then firmly secure using the included clamp (small) (5) according to the figure. (Refer to Fig. 21)
• Be sure to attach it to prevent the infiltration of water as well as any insects and other small creatures from
the outside. Otherwise a short-circuit may occur inside the control box.
[PRECAUTIONS]
Observe the notes mentioned below when wiring to the power supply terminal block and terminal block for
remote controller.
Tightening torque for the terminal blocks
• Use the correct screwdriver for tightening the terminal screws. If the blade of screwdriver is too small, the
head of the screw might be damaged, and the screw will not be properly tightened. • If the
terminal screws are tightened too hard, screws might be damaged.
• Refer to the table
below for the tightening torque of the terminal screws.
Size Tightening torque (N·m)
Terminal block for remote controller (6P) M3.5 0.79- 0.97
Power supply and Ground terminal block (3P) M4 1.18- 1.44
When none are available, follow the instructions below.
Do not connect wires of different gauge to the same grounding terminal.
Connect wires of the Do not connect wires Do not connect wires
same gauge to both of the same gauge to of different gauges.
side. oneside.
Looseness in the connection may deteriorate protection.
14 English

Precautions to be taken for power supplywiring
Use a round crimp-style terminal for connection to the power supply terminal block. In case it cannot be used due to
unavoidable reasons, be sure to observe the following instructions.
Be sure to peel off the sheath of power supply wiring more than 40 mm. (Refer to Fig. 20)
Attach insulation sleeve
Round crimp-style terminal
Fig.20
Power supply wiring and ground wire
• Forremote controller wiring,refer to the "INSTALLATION MANUAL OF REMOTECONTROLLER."
attached to the remote controller.
• Never connect power supply wiring to the terminal block for remote controller. A mistake of the sort
could damage the entire system.
• Use only specified wire and tightly connect wires to terminals. Be careful wires do not place external stress
on terminals.Keep wiring in neatorder and so as notto obstruct other equipment such as popping open the
control box cover. Make sure the cover closes tight. Incomplete connections could result in overheating, and in
worse case, electric shock or fire.
<Wiringclampmethod>
terminalblock(3P)
.
Fig.21
English 15
Power supply
terminal block (3P)
Ground terminal
Ground wiring
Power supply
wiring
Remote
controller wiring
Terminal block (6P)
In case of using the power
supply terminal together with
the other connecting wirings
Make sure to process the
insulation at the wire terminal
part properly so that the
terminals do not get in
contact each other
L N
L N
Clamp small (accessory) (5)
Clamp after tying
wiring between the
units and the ground
wiring
Power supply wiring
Ground wiring
Transmission wiring
Remote
controller wiring
Clamp small
(accessory) (5)
Clamp small
(accessory) (5)
(3 places)
Cut off any excess
material after tightening
Transmission wiring
P1P2 P3P4 P5P6
REMOTE
CNTRL
TRANSMIS
SION
WIRING
FORCED
OFF

CAUTION
• Be sure to attach the sealing material and putty (field supplied) to hole of wiring to prevent the infiltration of
water as well as any insects and other small creatures from outside. Otherwise a short-circuit may occur inside
the control box.
• When clamping the wirings, be sure no pressure is applied to the wire connections by using the included
clamp to make appropriate clamps. Also, when wiring, make sure the lid on the control box fits snugly by
arranging the wirings neatly and attaching the service lid firmly.When attaching the service lid, make sure
no wirings get caught in the edges. Pass wiring through the wiring through holes to prevent damage to them.
• Make sure the remote controller wiring, and transmission wire the wiring between the units, and other elec-
trical wiring do not pass through the same locations outside the machine, separating them by at least
50mm, otherwise electrical noise (external static) could cause mistaken operation or breakage.
• Use only specified wire and tightlyconnect wires to terminals. Be careful wires do not place external stress
on terminals. Keep wiring in neat order and so as not to obstruct other equipment such as popping open the service
cover. Make sure the cover closes tight. Incomplete connections could result in overheating, and in worse case,
electric shock or fire.
8-2 WIRING EXAMPLE
• Fit the power supply wiring of each unit with a switch and fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 systems)
Power supply
Main
switch
BSunit
(Onlyfor Heat
recovery system)
Outdoor unit
Transmission and remote controller wiring
Switch
Fuse
Indoor unit
Remote controller Fig. 22
1. When using 1 remote controller for 1 indoor unit. (Normal operation)
Power supply Power supply Power supply Power supply
220-240V
50Hz
LN
Outdoor unit
Control box
IN/D OUT/D
F1F2F1F2
No.1
System
LN
220-240V
50Hz
LN
220-240V
50Hz
LN
220-240V
50Hz
LN P
1 P 2 F 1 F 2 T 1 T 2
LN P
1 P 2 F 1 F 2 T 1 T 2
LN P
1 P 2 F 1 F 2 T 1 T 2
LN P
1 P 2 F 1 F 2 T 1 T 2
Most
downstream
Indoor
unitA Indoor unitB Indoor unitC Indoor unit
P
1 P 2 P 1 P 2 P 1 P 2 P 1 P 2
Fig.23
16 English
Power supply unit

2. For group control or use with 2 remote controllers
Power supply
220-240V Outdoorunit Note: It is not necessary to designate indoor unit
Control box address when using group control.
IN/D OUT/D
F1F2F1F2
50Hz
LN
No.2
System
The address is automatically set when power is
activated.
Indoor Indoor
unitB Indoor
unitC Most downstream
unitA
LN P 1 P 2 F 1 F 2 T 1 T 2 LN P 1 P 2 F 1 F 2 T 1 T 2 LN P 1 P 2 F 1 F 2 T 1 T 2 LN P 1 P 2 F 1 F 2 T 1 T 2
indoor unit
P 1 P 2 P 1 P 2 P 1 P 2
3. When including BS unit
Power supply
220-240V
50Hz
L N
Outdoor unit
Control box
IN/D OUT/D
F
1 F 2 F 1 F 2
BSunit
L N
For use with 2
remote controllers
Power supply
220-240V
50Hz BSunit
Fig.24
No.3
Control box Control box
System OUT/D IN/D OUT/D IN/D
F
1 F 2 F 1 F 2 F 1 F 2 F 1 F 2
Indoor unit A
LN P
1 P 2 F 1 F 2 T 1 T 2
LN P
1 P 2 F 1 F 2 T 1 T 2
Most
downstream
indoor unit
[ PRECAUTIONS ]
P 1 P 2 P 1 P 2
Fig.25
1. All transmission wiring except for the remote controller wires is polarized and must match the terminal
symbol.
2. A single switch can be used to supply power to units on the same system. However, branch switches and
branch circuit breakers must be selected carefully.
3. Do not ground the equipment on gas pipes, water pipes or lightning rods, or cross ground with telephones.
Improper grounding could result in electric shock.
English 17

8-3 CONTROL BY 2 REMOTE CONTROLLERS (CONTROLLING 1 INDOOR UNIT BY
2 REMOTE CONTROLLERS)
• When using 2 remote controllers, one must be set to "MAIN"and the other to "SUB".
MAIN/SUB CHANGEOVER
(1) Insert a screwdriver into the recess between the
Upper part of
upper and lower part of remote controller and, remote controller
working from the 2 positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of the remote controller. (Refer to Fig. 26)
Lower part of
remote controller
Insert the screwdriver here
and gently work off the
upper part of the remote controller.
Fig.26
(2) Turn the main/sub changeover switch on one of the
two remote controller PC boards to "S".
(Leave the switch of the other remote controller set to
"M".) (Refer to Fig. 27)
WiringMethod(See''7.ELECTRICWIRINGWORK'')(3)
Remove the service lid.
(4) Add remote control 2 (slave) to the terminal block
(6P) for remote controller (P
1
, P
2
) in the control box.
(There is no polarity.) (Refer to Fig. 24 and section
7-3 for the wiring size.)
(Factory setting)
(Only one remote
controller needs
to be changed if
factory settings
have remained
untoched.)
S
M
S
M
Remote
controller
PCboard
Fig.27
8-4 COMPUTERISED CONTROL (FORCED OFF AND ON/OFF OPERATION)
(1) Wire specifications and how to perform wiring
• Connect the input from outside to terminals T1 and T2 of the terminal block (6P) for remote controller.
F
2 T 1
Input A
T2
Wire specification
Gauge Sheathed vinyl cord or cable (2 wire)
0.75 - 1.25 mm
2
FORCED
OFF
Fig.28
External terminal
(2) Actuation
• The following table explains FORCED OFF and ON/OFF OPERATIONS in response to Input A.
(3) How to select FORCED OFF and ON/OFF OPERATION
• Turn the power on and then use the remote controller to select operation.
8-5 CENTRALIZED CONTROL
• For centralized control, it is necessary to designate the group No. For details, refer to the manual of each
optional controllers for centralized control.
18 English
Lenght Max. 100 m
Contact that can ensure the minimum
applicable load of 15V DC, 1 mA
FORCED OFF ON/OFF OPERATION
Input “ON” stops operation (impossible by remote controllers) Input OFF ÆON turns ON unit
Input OFF enables control by remote controller Input ON ÆOFF turns OFF unit