Kaden KD Series User manual

Installation
Manual
DUCTED AIR CONDITIONER
KD Series
KD36 | KD42 | KD48 | KD60

2| Kaden Installation Manual

Kaden Installation Manual | 3
Table of contents
Important note
Read this manual carefully before installing
or operating your new air conditioning unit.
Make sure to save this manual for future reference.
1. Safety precautions 4
Note about fluorinated gases 5
2. Accessories 6
3. Installation summary 7
4. Indoor unit installation 8
Indoor unit parts 8
Safety precautions 8
Indoor unit installation instructions 9
5. Outdoor unit installation 15
Outdoor unit installation instructions 15
Outdoor unit specifications 16
Drain joint installation 17
Notes on drilling hole in wall 17
6. Drainpipe installation 18
Note on drainpipe installation 18
7. Refrigerant piping connection 20
Safety precautions 20
Note on pipe length and elevation 20
Refrigerant piping connection instructions 21
Note on minimum bend radius 23
8. Leak testing and evacuation 24
Leak, pressure test and evacuation 24
Preparations and precautions 25
Before performing evacuation 25
Opening outdoor unit valves 25
Note on adding refrigerant 25
9. Wiring 26
Safety precautions 26
Take note of fuse specifications 26
Outdoor unit wiring 26
Signal wiring between outdoor and indoor units 27
Indoor unit wiring 27
Power specifications 30
10. Electrical checks 31
Electrical safety checks 31
Before test run 31
During test run 31
11. Test run 32
Before test run 32
Test run instructions 32
12. Manual operations 33
Manual operations 33
Error codes 34

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1. Safety precautions
Read safety precautions before operation and installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
WARNING
Do not share the electrical outlet with other appliances.
Improper or insufficient power supply can cause fire or
electrical shock.
When connecting refrigerant piping, do not let
substances or gases other than the specified refrigerant
enter the unit. The presence of other gases or
substances will lower the unit’s capacity, and can cause
abnormally high pressure in the refrigeration cycle. This
can cause explosion and injury.
Do not allow children to play with the air conditioner.
Children must be supervised around the unit at all times.
1. Installation must be performed by an authorised dealer or
specialist. Defective installation can cause water leakage,
electrical shock, or fire.
2. Installation must be performed according to the
installation instructions. Improper installation can cause
water leakage, electrical shock, or fire.
3. Contact an authorised service technician for repair or
maintenance of this unit.
4. Only use the included accessories, parts, and specified
parts for installation. Using non-standard parts can cause
water leakage, electrical shock, fire, and can cause the
unit to fail.
5. Install the unit in a firm location that can support the unit’s
weight. If the chosen location cannot support the unit’s
weight, or the installation is not done properly, the unit
may drop and cause serious injury and damage.
6. Only fully qualified licensed personnel should install,
service or carry out maintenance to this air conditioning
unit. All electrical work is to follow local and national
wiring standards and the Installation Manual.
7. You must use an independent circuit and single outlet to
supply power. Do not connect other appliances to the
same outlet. Insufficient electrical capacity or defects in
electrical work can cause electrical shock or fire.
8. For all electrical work, use the specified cables. Connect
cables tightly, and clamp them securely to prevent
external forces from damaging the terminal. Improper
electrical connections can overheat and cause fire, and
may also cause shock.
9. All wiring must be properly arranged to ensure that
the control board cover can close properly. If the
control board cover is not closed properly, it can lead
to corrosion and cause the connection points on the
terminal to heat up, catch fire, or cause electrical shock.
10. In certain functional environments, such as kitchens,
server rooms, etc., the use of specially designed air-
conditioning units is highly recommended.
11. This appliance can be used by children aged from 8
years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience
and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way
and understand the hazards involved. Children must not
play with the appliance. Cleaning and user maintenance
must not be made by children without supervision.
This symbol is a CAUTION, and indicates that ignoring instructions may cause moderate injury to your person,
or damage to your unit or other property.
This symbol indicates that you must never perform the action indicated.
This symbol is a WARNING, and indicates that ignoring instructions may cause death or serious injury.

Kaden Installation Manual | 5
CAUTION
Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas accumulates around
the unit, it may cause fire.
Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too much exposure to water can
cause electrical components to short circuit.
1. The product must be properly grounded at the time of installation, or electrical shock may occur.
2. Install drainage piping according to the instructions in this manual. Improper drainage may cause water damage to your
home and property.
Note about uorinated gases
1. This air-conditioning unit contains fluorinated gases. For specific information on the type of gas and the amount, please
refer to the relevant label on the unit itself.
2. Installation, decommissioning, service, maintenance and repair of this unit must be performed by a licensed technician.
3. Product decommissioning and recycling must be performed by a licensed technician.
4. If the system has a leak-detection system installed, it must be checked for leaks at least every 12 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
6. Only ARC (Australian Refrigeration Council) licence holders can install and commission this air conditioner.
This air conditioner must be installed to meet the requirements of the current version of AS/NZS 5149.
7. It is illegal to vent some types of refrigerant to the atmosphere.

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2. Accessories
The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air
conditioner. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail.
Name Shape Quantity
Tubing and fittings Soundproof/insulation sheath 2
Cooling and heating
Drain joint 1
Seal ring 1
Others
Owner’s manual 1
Installation manual 1
Display panel
(for testing purposes only) 1
EMC magnetic ring
Magnetic ring – wrap the electric wires
S1 & S2 (P & Q & E) around the magnetic
ring twice 1
Magnetic ring – hitch on the connective
cable between the indoor unit and outdoor
unit after installation
KD36 = 2
KD42 = 1
KD48 = 1
KD60 = 0
Wired controller
Wired controller 1
Wired controller manual 1

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3. Installation summary
Install the indoor unit (page 8) Install the outdoor unit (page 15) Install the drainpipe (page 18)
Connect the wires (page 26) Leak test and evacuation
(page 24)
Connect the refrigerant pipes
(page 20)
Perform a test run (page 32)
1
6
7
2
5
3
4

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4. Indoor unit installation
Indoor unit parts
Fig. 4.1 (applicable to KD36, KD42, KD48 and KD60)
• Upon delivery, the package should be checked and any
damage should be reported immediately.
• When handling the unit, take into account the following:
The unit is fragile, handle the unit with care.
• Keep the unit upright in order to avoid
compressor damage.
• When lifting the unit, always use protectors to prevent
belt damage and pay attention to the position of the
unit’s centre of gravity.
Safety precautions
WARNING
Securely install the indoor unit on a structure that can
sustain its weight. If the structure is too weak, the unit may
fall, causing personal injury, unit and property damage, or
even death.
CAUTION
Install the indoor and outdoor units, cables and wires at
least 1m from televisions or radios to prevent static or
image distortion. Depending on the appliances, a 1m
distance may not be sufficient.
DO NOT install unit in the following locations:
✕Where oil drilling or fracking is taking place.
✕Coastal areas with high salt content in the air.
✕Areas with caustic gases in the air, such as near
hot springs.
✕Areas with power fluctuations, such as factories.
✕Enclosed spaces, such as cabinets.
✕Areas with strong electromagnetic waves.
✕Areas that store flammable materials or gas.
✕Rooms with high humidity, such as bathrooms or
laundry rooms.
Air inlet
Air outlet Heat exchanger
Electric control
cabinet
Drain hose Refrigerant
connecting pipe

Kaden Installation Manual | 9
Indoor unit installation instructions
Step 1: Select installation location
The indoor unit should be installed in a location that meets the
following requirements:
✓Enough room for installation and maintenance.
✓Enough room for the connecting pipe and drainpipe.
✓The ceiling is horizontal and its structure can sustain the
weight of the indoor unit.
✓The air inlet and outlet are not impeded.
✓The airflow can fill the entire room.
✓There is no direct radiation from heaters.
Fig. 4.2
Step 2: Hang indoor unit
1. Please refer to the following diagrams to locate the four positioning screw bolt holes on the ceiling. Be sure to mark the places
where you will drill ceiling hook holes.
This unit has been installed with an air intake pipe flange, but there is no air filter. (See Fig. 4.3 and Fig. 4.4)
Fig. 4.3 (applicable to KD36, KD42 and KD48)
Maintenance room
Air inlet
Air outlet
600mm
or more
500mm
or more
600mm x 600mm
checking orifice
29
14
NOTE: 12 groups all aroundNOTE: 14 groups all around
130
170
550
380
1200
900
270
1000 (air outlet duct flange)
6
2 135 4
6
334
253
Ø 52 – Ø 3.2
10
10
Ø 5
2 – Ø 3.2
10
10
495
(suspension
position)
29
14
1236 (suspension position)
925
325
1145 (air inlet duct flange)
OUT IN

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Fig. 4.4 (applicable to KD60 only)
Table 4.1
Number Name Description
1 Gas pipe connection Ø 15.9 (KD36, KD42 and KD48) Ø19 (KD60)
2 Liquid pipe connection Ø 9.5
3 Drain pipe connection OD Ø 25 ID Ø 20
4 Drain pipe connection Using drain pump
5 Power supply connection –
6 Air discharge flange –
44
20
NOTE: 16 groups all around
(the same of the air inlet flange)
280
280
770
440
700
(suspension
position)
44
20
1436 (suspension position)
1000
500
1188 (air inlet duct flange)
1400
1000
500
1188 (air outlet duct flange)
6
2 135 4
6
334
253
Ø 5
2 – Ø 3.2
10
10
OUT IN

Kaden Installation Manual | 11
Fig. 4.5 (applicable to KD36, KD42, KD48 and KD60)
Table 4.2
Model Outline dimension Size of
mounted lug
Air outlet opening size
(symmetry of air outlet opening)
Air inlet opening size
(symmetry of air inlet opening)
A B C D E F G H I J K L M N O
KD36,
KD42 &
KD48
625/
24.6
1200/
47.2
380/
15
495/
19.5
1236/
48.6
1000/
39.3
253/
10
270/
10.6
900/
35.4
170/
6.7
1145/
45
334/
13.1
325/
12.8
925/
36.4
130/
5.1
KD60 858/
33.8
1400/
55.1
440/
17.3
700/
27.5
1436/
56.5
1188/
46.7
385/
15
500/
20
1000/
39.3
280/
11
1188/
46.7
385/
15
500/
20
1000/
39.3
280/
11
Table 4.3
Number Name Description
1 Gas pipe connection Ø 15.9 (KD36, KD42 and KD48)
2 Liquid pipe connection Ø 9.5
3 Drain pipe connection OD Ø 25 ID Ø 20
4 Drain pipe connection Using drain pump
5 Power supply connection –
6 Air inlet duct flange Some models
7 Air outlet duct flange –
6
2 135 4
7
OUT IN
J
E
BN
I
A
C
D
M
HK
F
GOL

12 | Kaden Installation Manual
Wood
Place the wood mounting across the roof beams, then install
the hanging screw bolts. (See Fig. 4.6)
Fig. 4.6
New concrete bricks
Inlay or embed the screw bolts. (See Fig. 4.7)
Fig. 4.7
Original concrete bricks
Use an embedding screw bolt, crock and stick harness.
(See Fig. 4.8)
Fig. 4.8
Steel roof beam structure
Install and use the supporting steel angle. (See Fig. 4.9)
Fig. 4.9
CAUTION
The unit body must be completely aligned with the hole.
Ensure that the unit and the hole are the same size before
moving on.
2. Install and fit pipes and wires after you have finished
installing the main body. When choosing where to start,
determine the direction of the pipes to be drawn out.
Especially in cases where there is a ceiling involved, align
the refrigerant pipes, drain pipes, and indoor and outdoor
lines with their connection points before mounting the unit.
3. Install hanging screw bolts.
• Cut off the roof beam.
• Strengthen the point at which the cut was made.
Consolidate the roof beam.
4. Drill 4 holes 10cm deep at the ceiling hook positions in the
internal ceiling. Be sure to hold the drill at a 90° angle to
the ceiling.
5. Secure the bolt using the washers and nuts provided.
6. Install the four suspension bolts.
7. Mount the indoor unit with at least two people to lift and
secure it. Insert suspension bolts into the unit’s hanging
holes. Fasten them using the washers and nuts provided.
(See Fig. 4.10)
Fig. 4.10
8. Mount the indoor unit onto the hanging screw bolts with a
block. Position the indoor unit flat using a level indicator to
prevent leaks. (See Fig. 4.9)
Fig. 4.11
NOTE: Confirm the minimum drain tilt is 1/100 or more.
Roof beam
Ceiling
Hanging screw bolts
Wood mounting
Blade shape insertion Slide insertion
Steel bar
Embedding screw bolt
(Pipe hanging and
embedding screw bolt)
Hanging screw bolt
Hanging bolts Supporting angle steel
Screw nut
Screw nut
Shockproof cushion
Overhang part
Washer
Hanging
screw bolt

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Step 3: Diagrammatic sketch for
installing the main body
Installing the dust-proof net and canvas air passage
1. Install the dust proof net according to the installation
manual.
2. Install the canvas air passage underneath the
dust-proof net.
Step 4: Duct and accessories installation
1. The air inlet and air outlet duct should be far enough apart
to prevent air from the outlet entering the air inlet. Please
attach the outside air duct to the indoor air outlet/inlet
flange by using the type ST3.9 x 10 screw.
2. Connect the duct according to the following diagram:
Fig. 4.12
Note
1. Do not place the connecting duct weight on the
indoor unit.
2. When connecting the duct, use a non-flammable
flexible tie-in to prevent vibrating.
3. When connecting the duct, install in place prone to
takedown for maintenance.
4. Change the fan motor static pressure corresponding to
external duct static pressure.
5. If installed in a place like a meeting room where noise
is easy to be perceived, design isolation booth and
internal duct underlayer to muffle the duct system
and weaken the air encounter noise in the duct.
Step 5: Motor and drain pump maintenance
Pump maintenance
1. Remove four screws from the drain pump.
2. Unplug the pump power supply and water level
switch cable.
3. Detach the pump.
Fig. 4.13
Motor maintenance
There are three methods:
1. Remove the top plate from the top.
• Remove the top cover as shown.
Fig. 4.14
• Loosen the four bolts and two screws which are used
to fasten the front side plate.
Fig. 4.15
• Remove the cord of the motor, take off the front side
plate and repair the motor.
Fig. 4.16
Air outlet Air inletAir dust
filter
Checking
orifice
Flexible tie-in
Isolation booth
Pump

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2. Remove the bottom plate from the bottom.
• Remove the bottom base as shown.
Fig. 4.17
• Loosen the four bolts and two screws which are used
to fasten the front side plate (be careful, the front side
plate may fall down).
Fig. 4.18
• Remove the cord of the motor, take off the front side
plate and repair the motor.
Fig. 4.19
3. Repair it directly (only applicable to plastic scroll
and fan wheel).
• Take off the chassis assembly.
• Take off the volute.
• Take off the motor.
Fig. 4.20
Volute
Motor
Chassis
assembly

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5. Outdoor unit installation
Outdoor unit installation
instructions
Step 1: Select installation location
The outdoor unit should be installed in the location that meets
the following requirements:
✓Place the outdoor unit as close to the indoor unit as
possible.
✓Ensure that there is enough room for installation and
maintenance.
✓The air inlet and outlet must not be obstructed or exposed
to strong wind.
✓Ensure the location of the unit will not be subject to
snowdrifts, accumulation of leaves or other seasonal debris.
If possible, provide an awning for the unit.
✓Ensure the awning does not obstruct airflow.
✓The installation area must be dry and well ventilated.
✓There must be enough room to install the connecting pipes
and cables and to access them for maintenance.
✓The support is flat and horizontal and can stand the weight
of the outdoor unit, and will not add additional noise or
vibration.
✓It is easy to install the connecting pipes or cables.
✓Determine the air outlet direction where the discharged air
is not blocked. If necessary, install a blind that does not
interfere with the air flow.
✓The area must be free of combustible gases and chemicals.
✓The pipe length between the outdoor and indoor unit may
not exceed the maximum allowable pipe length.
✓If possible, do not install the unit where it is exposed to
direct sunlight.
NOTE: All the pictures in this manual are for explanation
purpose only. They may be slightly different from the air
conditioner you purchased. The actual shape shall prevail.
Fig. 5.1
✓If possible, make sure the unit is located far away from your
neighbours’ property so that the noise from the unit will not
disturb them.
✓If the location is exposed to strong winds (for example:
near a seaside), the unit must be placed against the wall
to shelter it from the wind. If necessary, use an awning.
(See Fig. 5.1 and Fig. 5.2)
✓Install the indoor and outdoor units, cables and wires at
least 1 metre from televisions or radios to prevent static or
image distortion. Depending on the radio waves, a 1 metre
distance may not be enough to eliminate all interference.
✓During heating mode, condensate should be well drained
away by the drain hole to an appropriate place, so as not to
interfere with other people.
Fig. 5.2
Step 2: Install outdoor unit
Fix the outdoor unit with anchor bolts (M10).
CAUTION
Fig. 5.3
• Be sure to remove any obstacles that may block
air circulation.
• Make sure you refer to length specifications to ensure
there is enough room for installation and maintenance.
Strong
wind
Strong
wind
Strong
wind
>60cm
Fix with bolts

16 | Kaden Installation Manual
Outdoor unit specications
Split type outdoor unit
(Refer to Fig. 5.4, Fig. 5.5, Fig. 5.6, Fig. 5.7 and Table 5.1)
Fig. 5.4
Fig. 5.5
Fig. 5.6
Table 5.1 Length specifications of split type outdoor unit
Model
Outdoor unit
dimensions
W x H x D
Mounting dimensions
Distance A Distance B
KD36 946mm x 810mm
x 410mm 673mm 403mm
KD42,
KD48 &
KD60
952mm x 1333mm
x 415mm 634mm 404mm
NOTE: The minimum distance between the outdoor unit
and walls described in the installation guide does not apply
to airtight rooms. Be sure to keep the unit unobstructed in
at least two of the three directions (M, N, P). (See Fig. 5.7)
Fig. 5.7
60cm
above
30cm from
back wall
30cm
on left
M
N
P
60cm
on right
200cm
in front
H
H
B
D
W
W
A

Kaden Installation Manual | 17
Rows of series installation
Table 5.2 The relations between H, A and L are as follows.
L A
L ≤ H L ≤ 1/2H 25 cm or more
1/2H < L ≤ H 30 cm or more
L > H Can not be installed
Fig. 5.8
300 cm or more
A
H
L
60 cm or more
25 cm
or more
25 cm
or more
150 cm or more
Drain joint installation
If the drain joint comes with a rubber seal (See Fig. 5.9 A),
do the following:
1. Fit the rubber seal on the end of the drain joint that will
connect to the outdoor unit.
2. Insert the drain joint into the hole in the base pan of
the unit.
3. Rotate the drain joint 90° until it clicks in place facing the
front of the unit.
4. Connect a drain hose extension (not included) to the drain
joint to redirect water from the unit during heating mode.
Fig. 5.9
If the drain joint doesn’t come with a rubber seal (See Fig. 5.9 B) ,
do the following:
5. Insert the drain joint into the hole in the base pan of the
unit. The drain joint will click in place.
6. Connect a drain hose extension (not included) to the drain
joint to redirect water from the unit during heating mode.
NOTE: Make sure the water drains to a safe location
where it will not cause water damage or a slipping hazard.
Notes on drilling hole in wall
You must drill a hole in the wall for the refrigerant piping,
and the signal cable that will connect the indoor and
outdoor units.
1. Determine the location of the wall hole based on the
location of the outdoor unit.
2. Using a 65mm core drill, drill a hole in the wall.
NOTE: When drilling the wall hole, make sure to avoid
wires, plumbing, and other sensitive components.
3. Place the protective wall cuff in the hole. This protects
the edges of the hole and will help seal it when you
finish the installation process.
Base pan hole
of outdoor unit
Seal
Drain joint
Seal
A B

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6. Drainpipe installation
The drainpipe is used to drain water away from the unit.
Improper installation may cause unit and property damage.
CAUTION
• Insulate all piping to prevent condensation, which
could lead to water damage.
• If the drainpipe is bent or installed incorrectly, water
may leak and cause a water-level switch malfunction.
• In HEAT mode, the outdoor unit will discharge water.
Ensure that the drain hose is placed in an appropriate
area to avoid water damage and slippage.
• Do not pull the drainpipe forcefully. This could
disconnect it.
Indoor drainpipe installation
Install the drainpipe as illustrated in Fig. 6.1.
Fig. 6.1
1. Cover the drainpipe with heat insulation to prevent
condensation and leakage.
2. Attach the mouth of the drain hose to the unit’s outlet
pipe. Sheath the mouth of the hose and clip it firmly
with a pipe clasp. (See Fig. 6.2)
Fig. 6.2
Note on drainpipe installation
• When using an extended drainpipe, tighten the indoor
connection with an additional protection tube. This
prevents it from pulling loose.
• The drainpipe should slope downward at a gradient of
at least 1/100 to prevent water from flowing back into
the air conditioner.
• To prevent the pipe from sagging, space hanging wires
every 1 – 1.5m.
• If the outlet of the drainpipe is higher than the body’s
pump joint, use a lift pipe for the indoor unit’s exhaust
outlet. The lift pipe must be installed no higher than
55cm from the ceiling board. The distance between
the unit and the lift pipe must be less than 20cm.
Incorrect installation could cause water to flow back
into the unit and flood.
• To prevent air bubbles, keep the drain before the riser
level or sloping slightly up.
Drainpipe installation for units with a pump
Fig. 6.3
NOTE: If the drain pump spigot is not used, the drain
pump will still engage if the drain tray fills and activates
the water level sensor. This can lead to water leakage.
Possible actions to avoid water leakage:
1. Disconnect power to drain pump.
2. Plumb drain pump spigot into gravity fed drain
Insulation
Drain hose
Drainpipe
connecting port
Metal clamp
1 – 1.5m
Ceiling
Lean over 1/50
Ceiling
≤20cm 1 – 1.5m
≤55cm
0 – 75mm
Lean over 1/50

Kaden Installation Manual | 19
3. Using a 65mm core drill, drill a hole in the wall. Make sure
that the hole is drilled at a slight downward angle, so that
the outdoor end of the hole is lower than the indoor end
by about 12mm. This will ensure proper water drainage
(See Fig. 6.4). Place the protective wall cuff in the hole.
This protects the edges of the hole and will help seal it
when you finish the installation process.
Fig. 6.4
NOTE: When drilling the hole, make sure to avoid wires,
plumbing, and other sensitive components.
4. Pass the drain hose through the wall hole. Make sure the
water drains to a safe location where it will not cause water
damage or a slipping hazard.
NOTE: The drainpipe outlet should be at least 5cm above
the ground. If it touches the ground, the unit may become
blocked and malfunction. Make sure that the drain has a
U or S pipe to catch odours that might otherwise come
back into the house.
NOTE: When connecting multiple drainpipes, install the
pipes as shown in Fig. 6.5.
With drain pump
Without drain pump
Fig. 6.5
Drainage pump test procedure
Check that the drainpipe is unhindered. This test should be
performed on newly built houses before the ceiling is surfaced.
1. Remove the test cover. Fill the water pan with 2 litres
of water.
Fig. 6.6
Fig. 6.7
2. Turn on the unit in COOLING mode. You will hear the drain
pump. Check whether the water is discharged properly
(a 1 minute lag is possible, depending on the length of the
drain pipe). Check whether water leaks from the joints.
3. Turn off the air conditioner and put the cap back on.
0 – 53cm
≥10cm
Stow tube
C
L
O
S
E
D
O
P
E
N
C
L
O
S
E
D
O
P
E
N
Test cap
Wall
Indoor
≈ 12mm
Outdoor

20 | Kaden Installation Manual
7. Refrigerant piping connection
Safety precautions
WARNING
• All filed piping must be completed by an ARC licensed
technician and must comply with all local and national
regulations including AS/NZS 5149 and Australian
wiring regulations.
• When the air conditioner is installed in a small room,
measures must be taken to prevent the refrigerant
concentration in the room from exceeding the safety
limit in the event of refrigerant leakage. If the refrigerant
leaks and its concentration exceeds its proper limit,
hazards due to lack of oxygen may result.
• When installing the refrigeration system, ensure that
air, dust, moisture or foreign substances do not enter
the refrigerant circuit. Contamination in the system may
cause poor operating capacity, high pressure in the
refrigeration cycle, explosion or injury.
• Ventilate the area immediately if there is refrigerant
leakage during the installation. Leaked refrigerant gas is
both toxic and flammable. Ensure there is no refrigerant
leakage after completing the installation work.
Note on pipe length and elevation
Ensure that the length of the refrigerant pipe, the number of
bends, and the drop height between the indoor and outdoor
units meets the requirements shown in the following table :
Table 7.1 The maximum length and drop height based on
models. (Unit: metres)
Type of model Length of piping Maximum drop
height
KD36, KD42,
KD48 and KD60 65 30
CAUTION
Oil traps
If oil flows back into the outdoor unit’s compressor when
the indoor unit is installed higher than the outdoor unit,
this might cause liquid compression or deterioration of
oil return.
Oil traps in the rising gas piping can prevent this.
An oil trap should be installed every 10m of vertical
gas piping. (See Fig. 7.1)
Fig. 7.1
The indoor unit is installed higher than the outdoor unit
10m
Indoor unit
Outdoor unit
Oil trap
Gas piping
Liquid
piping
10m