Cooper & Hunter CH-12LCDTU/I User manual

CH-09LCDTU/I
CH-12LCDTU/I
CH-18LCDTU/I
CH-24LCDTU/I

Accessories ....................................... 05
a. Indoor Unit Parts .............................. 08
b. Indoor Unit Installation Instructions ..... 09
Safety Precautions . .......................... 06
Outdoor Unit Installation . 13
a. Outdoor Unit Installation Instructions . 13
b. Outdoor Unit Types and Specifications .... 14
c. Notes on Drilling Hole in Wall . 15
Drainpipe Installation ....................... 16
Table of Contents
Installation Manual
Indoor Unit Installation .................... 08
Installation Overview ....................... 07
1
2
5
3
4
6

Page 3 
Refrigerant Piping Connection....................... 18
A. Notes on Pipe Length and Elevation .............. 18
B. Refrigerant Piping Connection Instructions ...20
Wiring................................................. 23
a. Outdoor Unit Wiring .................. 23
b. Indoor Unit Wiring ..................... 24
c. Power Specifications ................... 26
Air Evacuation.................................................. 28
a. Evacuation Instructions ................................ 28
b. Note on Adding Refrigerant ....................... 29
Test Run............................................. 30
MC MC
7
8
9
10
L N

Page 5 
Accessories 1
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 re, or equipment failure.
Connecting wire for display (2m)
QUANTITY
SHAPENAME
Soundproof / insulation sheath 2
1
1
Tubing & Fittings
Others
Transfer connector(Φ6.35-Φ9.52)/
( )(Packed with the indoor unit)
NOTE: Pipe size may dier from appliance to
appliance. To meet dierent pipe size requirements,
sometimes the pipe connections need a transfer
connector installed on the outdoor unit .
Drain joint (some models)
Seal ring (some models)
Drainpipe Fittings
(for cooling & heating)
Seal sponge (some models)
EMC Magnetic Ring
(some models)
Magnetic ring
(wrap the electric wires S1 & S2 ( P & Q & E )
around the magnetic ring twice)
Magnetic ring
(Hitch on the connective cable between the indoor
unit and outdoor unit after installation.)
1
1
Orice (some models) 1
1(on some models)
1
Optional accessories
There are two types of remote controls: wired and wireless.
Select a remote controller based on customer preferences and requirements and install in an
appropriate place.
Refer to catalogues and technical literature for guidance on selecting a suitable remote controller.
•
S1&S2(P&Q&E)
Display panel
*Just for testing purposes only
1(on some models-
KJR-120G,KJR-120H)
1
Wired remote control manual
1
Wireless remote control manual
Installation manual
Owner‘s manual
1
1

Safety Precautions 2
Read Safety Precautions Before 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
• Carefully read the Safety Precautions before installation.
• In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
• Only trained and certified technicians should install, repair and service this air
conditioning unit.
Improper installation may result in electrical shock, short circuit, leaks, fire or other damage to
the equipment and personal property.
• Strictly follow the installation instructions set forth in this manual.
Improper installation may result in electrical shock, short circuit, leaks, fire or other damage to
the equipment.
•Before you install the unit, consider strong winds, typhoons and earthquakes that might aect
your unit and locate it accordingly. Failure to do so could cause the equipment to fail.
•After installation, ensure there are no refrigerant leaks and that the unit is operating properly.
Refrigerant is both toxic and flammable and poses a serious health and safety risk.
Note about Fluorinated 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, service, maintenance and repair of this unit must be performed by a certified
technician.
3.
Product uninstallation and recycling must be performed by a certified 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.
Failure to observe a warning may result in death. The product must be installed by
installers or contractors who are licensed HVAC professionals and in compliance with
all local, state and provincial laws.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION
Page 6 

Installation Overview 3
Unit Installation
Overview
L N
123
4
5
MC MC
6
7
Install the indoor unit
(Page 8)
INSTALLATION ORDER
Install the outdoor unit
(Page 13) Install the drainpipe (Page 15)
Evacuate the refrigeration system
(Page 28) Connect the wires (Page 23) Connect the refrigerant pipes (Page 18)
Perform a test run
(Page 30)
Page 7  

Indoor Unit Installation 4
Indoor Unit
Installation
Indoor Unit Parts
Fig. 4.1
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
• DO NOT install the indoor unit in a bathroom
or laundry room as excessive moisture can
short the unit and corrode the wiring.
CAUTION
•Install the indoor and outdoor units, cables
and wires at least 1m (3.2’) from televisions
or radios to prevent static or image
distortion. Depending on the appliances, a
1m (3.2’) distance may not be sufficient.
•If the indoor unit is installed on a metal
part of the building, it must be grounded.
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.
CAUTION
DO NOT install the unit in the following
locations:
Where oil drilling or fracking is taking place.
Coastal areas with high salt content in the air
Near geothermal activity and corrosive gas
Buildings that may experience power
uctuations
Enclosed spaces
Areas with strong electromagnetic waves
Areas that store ammable materials or gas
Rooms with high humidity, such as
bathrooms or laundry rooms
Air outlet
Air inlet
Air filter(on selected models)
Drain hose
Electric control cabinet
Refrigerant connecting pipe
√
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√
√
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√
Safety Precautions
Page 8 
It is embeded installation.
√

Indoor Unit
Installation
Air outlet
Air inlet
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 paces where you will drill ceiling hook holes.
Maintenance space
Installation place
Left
side
Right
side
Strong and durable ceiling
Indoor unit
>4in(10cm) >11.8in(30cm)
>0.8in(2cm)
>0.8in(2cm)
>11.8in(30cm)
> 8.2in(250cm)
Floor
Service access Ceiling
(When no ceiling)
B
Fig. 4.2
Air outlet dimensions
Page 9 
>(20cm)
7.9in 11.8in
23.6inx23.6in (60cmx60cm)
checking orifice
>(30cm)

Fig. 4.3
Air lter
Descending ventilation opening and mounted hook
Air lter
Electric control box
Table.4-1 (unit: inch/mm)
MODEL
(Btu/h)
Outline dimension
A B C
air outlet opening size
D E F
air return opening size
Size of mounted lug
I
J
G
H
18K
24K
30K~36K
36K~60K
9K/12K 7.9/200 19.9/50627.6/700 6/152 21.1/53717.7/450 7.3/186 29.2/74123.6/599
14.2/360
Indoor Unit
Installation
Fig. 4.6 Fig. 4.7
Original concrete bricks
Use an embedding screw bolt, crock, and stick
harness.(See Fig.4.6)
Steel Roof beam structure
Install and use the supporting steel angle.
(See Fig.4.7)
Fig. 4.4
Wood
Place the wood mounting across the roof beam,
then install the hanging screw bolts.(See Fig.4.4)
Wood mounting
Roof beam
Hanging screw bolts
Ceiling Fig. 4.5
New concrete bricks
Inlay or embed the screw bolts. (See Fig. 4.5)
(Blade shape insertion) (Slide insertion)
Steel bar
Embedding screw bolt
(Pipe hanging and embedding screw bolt)
Hanging screw bolt
Hanging
bolts
Supporting
steel angle
Page 10 
Air inlet dimensions
9.8/249 30.5/77453.5/1360
11.8/300 34.4/87447.2/1200
6.9/175 46.7/118627.6/700
8.9/227 41.1/104431.5/800
8.9/228
11/280
55.1/140049.6/1261
48.8/124043.3/1101
23.5 / 598
27.4 / 697
9.8/249 30.5/77443.3/1100 6.9/175 36.5/92627.6/700 8.9/228 44.9/114039.4/1001
23.5 / 598
8.3/210 26.5/67434.6/880 5.4/136 27.8/70623.6/600 7.5/190 36.2/92030.8/782
20 / 508

Indoor Unit
Installation
Fig. 4.10
Step 3: Duct and accessories installation
NOTE: 1. Do not place the connecting duct
weight on the indoor unit.
2. When connecting the duct, use an
nonammable canvas tie-in to prevent
vibrating.
3. Insulation foam must be wrapped outside the
duct to avoid condensate. An internal duct
underlayer can be added to reduce noise,
if the end-user requires.
1. Install the lter (optional) according to the size
of the air inlet.
5. Refer to the following static pressure guidelines
when installing the indoor unit.
Change the fan motor static pressure
according to external duct static pressure.
2. Install the canvas tie-in between the body and
the duct.
3. The air inlet and air outlet duct should be far
enough apart enough to a avoid air passage
short-circuit.
4. Connect the duct according to the following
diagram: Canvas tie-in Canvas tie-in
Air outlet
Isolation booth
Isolation booth
checking orice
Air inlet
Air dust lter
Table.4-2
MODEL
(Btu/h)
Static Pressure
(Pa/in.wg)
0~100/0~0.4
18K
0~160/0~0.64
24K
0~160/0~0.64
30K~36K
0~160/0~0.64
42K~60K
0~50/0~0.2
9K
0~50/0~0.2
12K
Cut o the roof beam.
Strengthen the point at which the cut
was made. Consolidate the roof beam.
Fig. 4.9
Screw nut
Washer
Hanging screw bolt
Overhang part
Shockproof cushion
NOTE: Conrm the minimum drain tilt is 1/100
or more.
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 t pipes and wires after you have
nished 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.
4. After you select an installation location,align
the refrigerant pipes, drain pipes, as well as
indoor and outdoor wires with their
connection points before mounting the unit.
5. Drill 4 holes 10cm (4”) deep at the ceiling
hook positions in the internal ceiling. Be sure
to hold the drill at a 90° angle to the ceiling.
6. Secure the bolt using the washers and nuts
provided.
7. Install the four suspension bolts.
8. 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. 4.8).
9. Mount the indoor unit onto the hanging
screw bolts with a block. Position the
indoor unit at using a level indicator to
prevent leaks. (See Fig. 4.9).
Fig. 4.8
Page 11 

Indoor Unit
Installation
Step 4: Adjust the air inlet direction
(from rear side to under-side).
1. Take o the ventilation panel and ange.
2. Change the mounting positions of the
ventilation panel and air return ange.
Air return ange
Ventilation panel
3. When installing the lter mesh, t it into the
ange as illustrated in the following gure.
NOTE: All the gures in this manual are for
demonstration purposes only. The air conditioner
you have purchased may be slightly dierent in
design, though similar in shape.
Step 5: Fresh air duct installation
Dimension : Duct joint for fresh air
Ø125mm(4.92”) Ø160mm(6.3”)
MODLE
18-60
Step 6: Motor and drain pump maintenance
Motor maintain:
Take o the ventilated panel.
Take o the blower housing.
Take o the motor.
1.
2.
3.
(the rear ventilated panel is used as an example)
Motor
Blower housing
Ventilated panel
Pump maintainance:
Remove four screws from the drain pump.
Unplug the pump power supply and water
level switch cable.
Detach the pump.
1.
2.
3.
Pump
Fig. 4.11
Fig. 4.12
Fig. 4.13
Fig. 4.14
Fig. 4.15
Fig. 4.16
Air return ange
Ventilation panel
Page 12 

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 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.
If possible, make sure the unit is located far
away from your neighbors’ 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 & 5.2)
Install the indoor and outdoor units, cables
and wires at least 1 meter from televisions or
radios to prevent static or image distortion.
Depending on the radio waves, a 1 meter
distance may not be enough to eliminate all
interference.
Strong wind
Strong wind
Strong wind
Fig. 5.1 Fig. 5.2
Step 2: Install outdoor unit.
Fix the outdoor unit with anchor bolts (M10)
> 23.6”/60cm
Fix with bolts
CAUTION
• 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.
Fig. 5.3
Outdoor Unit Installation
5
√
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√
√
√
√
√
√
√
Page 13 

Outdoor Unit
Installation
Air Outlet
(Wall or obstacle)
H
D
W
Table 5.1: Length Specifications of Split
Type Outdoor Unit (unit: inch/mm)
Table 5.2: Length Specifications of Vertical
Discharge Outdoor Unit (unit: inch/mm)
DIMENSIONS
Split Type Outdoor Unit
(Refer to Fig 5.4, 5.5, 5.6, 5.10 and Table 5.1)
Vertical Discharge Type Outdoor Unit
(Refer to Fig 5.7, 5.8, 5.9 and Table 5.2)
Fig. 5.7
Fig. 5.8
Fig. 5.9
Fig. 5.6
Fig. 5.5
A
B
D
W
H
W
H
Fig. 5.4
Page 14 
>11.8” / 30cm
Air inlet
Air inlet Air inlet
Air inlet
(Wall or obstacle)
>11.8” / 30cm
>11.8” / 30cm
>11.8” / 30cm
> 47” / 120cm
Outdoor Unit Dimensions
W x H x D
Mounting Dimensions
Distance A Distance B
770x555x300 (30.3x21.85x11.81) 19.2 (487) 11.73 (298)
810x558x310 (31.9x22x12.2) 21.6 (549) 12.8 (325)
845x700x320 (33.27x27.5x12.6) 22 (560) 13.2 (335)
900x860x315 (35.4x33.85x12.4) 23.2 (590) 13.1 (333)
945x810x395 (37.2x31.9x15.55) 25.2 (640) 15.95 (405)
990x965x345 (38.98x38x13.58) 24.58 (624) 14.4 (366)
946x810x420 (37.24x31.9x16.53) 26.5 (673) 15.87 (403)
946x810x410 (37.24x31.9x16.14) 26.5 (673) 15.87 (403)
952x1333x410 (37.5x52.5x16.14) 24.96 (634) 15.9 (404)
952x1333x415 (37.5x52.5x16.34) 24.96 (634) 15.9 (404)
845x702x363 (33.27x27.6x14.3) 21.26 (540) 13.8 (350)
938x1369x392 (36.93x53.9x15.43) 24.96 (634) 15.9 (404)
900x1170x350 (35.4x46x13.8) 23.2 (590) 14.88 (378)
800x554x333 (31.5x21.8x13.1) 20.24 (514) 13.39 (340)
MODEL
DIMENSIONS
W H D
18 25/633 21.8/55421.8/554
24 25/633 21.8/55421.8/554
36 29.8/759 21.8/55421.8/554
36 25/633 23.6/60023.6/600
48 29.8/759 28/71028/710
60 33/843 28/71028/710

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. 5.10)
M
N
P
11.8”
/
30 cm from back wall
23.6”
/
60 cm on right
23.6”
/
60 cm above
11.8”
/
30 cm on left
78”
/
200 cm in front
Fig. 5.10
NOTE: Make sure the water drains to a safe
location where it will not cause water damage
or a slipping hazard.
Seal
Drain joint
(A) (B)
Base pan hole of
outdoor unit
Seal
Fig. 5.12
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 2.5”(65-mm)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 cu in the hole.
This protects the edges of the hole and will
help seal it when you nish the installation
process.
Outdoor Unit Installation
Fig. 5.11
L
H
118”
/
300 cm or more
A
23.6”
/
60 cm
or more
59”
/
150 cm
or more
9.8”
/
25 cm
or more
9.8”
/
25 cm
or more
Rows of series installation
L ≤H L ≤1/2H
L A
9.8” / 25 cm or more
1/2H < L ≤H 11.8”/ 30 cm or more
L >H Can not be installed
Table 5.3 The relations between H, A and L
are as follows.
Drain Joint Installation
If the drain joint comes with a rubber seal
(see Fig. 5.12 - 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.
If the drain joint doesn’t come with a rubber
seal (see Fig. 5.12 - B ), do the following:
1. Insert the drain joint into the hole in the base
pan of the unit. The drain joint will click in
place.
2. Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.
Page 15 

Fig. 6.3
(21.7”)
<55cm
Lean over 1/50
Drainpipe installation for units with a pump
Ceiling
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 (39-59”).
• If the outlet of the drainpipe is higher than
the body’s pump joint, provide a lift pipe for
the exhaust outlet of the indoor unit. The
lift pipe must be installed no higher than
55cm (21.7”) from the ceiling board. the
distance between the unit and the lift pipe
must be less than 20cm (7.9”). Incorrect
installation could cause water to flow back
into the unit and flood.
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.
NOTE ON PURCHASING PIPES
Installation requires a polyethylene tube
(exterior diameter = 3.7-3.9cm, interior diameter
= 3.2cm), which can be obtained at your local
hardware store or dealer.
Indoor Drainpipe Installation
Install the drainpipe as illustrated in Figure 6.2.
1.
2.
Drainpipe
connecting port
Drain hose
Pipe clasp Insulation
Fig. 6.1
Drainpipe Installation
Fig. 6.2
6
Drainpipe
Installation
Cover the drainpipe with heat insulation to
prevent condensation and leakage.
Attach the mouth of the drain hose to the
unit’s outlet pipe. Sheath the mouth of the
hose and clip it rmly with a pipe clasp.
(See Fig 6.1)
NOTE: When connecting multiple drainpipes,
install the pipes as illustrated in Fig 6.4.
Lean over 1/50
Ceiling
• To prevent air bubbles, keep the drain hose
level or slightly tiled up (<75mm / 3”).
Fig. 6.4
Page 16 
(39-59
<7.9”
20cm
39-59”
1-1.5m
0- 3”
0 - 75mm
0-20.8”
(0-53cm)
≥4”
≥(10cm)
39-59”
(1-1.5m)

Drainage test
Check that the drainpipe is unhindered.
This test should be performed on newly built
houses before the ceiling is paved.
Units with a pump.
Units without a pump.
1. Remove the test cover.
Fill the water pan with 2 liters of water.
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 o the air conditioner and put the cap
back on.
3. Using a 65-mm (2.5”) 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 (0.5”). This will ensure proper
water drainage (See Fig. 6.5). Place the
protective wall cu in the hole. This protects
the edges of the hole and will help seal it
once you nish installation.
Wall
IndoorOutdoor
Fig. 6.5
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.
Drainpipe Installation
Test cap Fig.6.7
Fig.6.8
C
L
O
S
E
D
O
P
E
N
C
L
O
S
E
D
O
P
E
N
Stow tube
Fig.6.6
Stow tube
Fill the water pan with 2 liters of water.
Check that the drainpipe is unhindered.
Page 17 
≈ 0.5 inch /12mm
NOTE: The drainpipe outlet should be at least
1.9” (5cm) above the ground. If it touches the
ground, the unit may become blocked and
malfunction. If you discharge the water directly
into a sewer, make sure that the drain has a U
or S pipe to catch odors that might otherwise
come back into the house.

Refrigerant Piping Connection
Safety Precautions
WARNING
•All eld piping must be completed by a
licensed technician and must comply with
the local and national 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.
Notes 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 Table 7.1:
Table 7.1: The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Refrigerant Piping with Twin Indoor Units
When installing multiple indoor units with a single outdoor unit, ensure that the length of the
refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements
illustrated in the following diagram:
Fig. 7.1
LL1
L2
H2
The line branch pipe
Indoor unit
Outdoor unit
H1
Indoor unit
The drop height
between indoor
unit
and outdoor unit
must be less than
or equal to 20m
(65.6’)
7
Refrigerant Piping
Connection
Page 18 
Type of model Capacity
(Btu/h) Length of
piping Maximum drop height
North America,
Australia and the
eu frequency
conversion Split
Ty pe
<15K 82/25 32.8/10
≥15K - <24K 98.4/30 65.6/20
≥24K - <36K 164/50 82/25
≥36K - ≤60K 213/65 98.4/30
Other Split Type
12K 49/15 26/8
18K-24K 82/25 49/15
30K-36K 98.4/30 65.6/20
42K-60K 164/50 98.4/30
The drop height
between two
indoor units
must be less
than or equal to
19.6” ( 50cm)

Fig. 7.2 Fig. 7.3
Refrigerant Piping
Connection
Oil traps
CAUTION
•
If the indoor unit is installed higher than the
outdoor unit:
An oil trap should be installed every 32.8ft
(10m)of vertical suction line riser. (See Fig.
7.2)
-If oil flows back into the outdoor unit’s
compressor, this might cause liquid
compression or deterioration of oil return.
Oil traps in the rising gas piping can prevent
this.
CAUTION
The indoor unit is installed higher than the
outdoor unit
If the outdoor unit is installed higher than the
indoor unit:
-It is recommended that vertical suction risers
not be upsized. Proper oil return to the
compressor should be maintained with suction
gas velocity. If velocities drop below7.62m/s
(1500fpm (feet per minute)), oil return will be
decreased. An oil trap should be installed every
20ft (6m)of vertical suction line riser.
(See Fig. 7.3)
The outdoor unit is installed higher than the
indoor unit
Page 19 

Pipe
Reamer
Point dow
n
Fig. 7.5
CAUTION
DO NOTdeform pipe while cutting. Be extra
careful not to damage, dent, or deform the pipe
while cutting. This will drastically reduce the
heating efficiency of the unit.
1. Make sure that the pipe is cut at a perfect
90° angle. Refer to Fig. 7.4 for examples
of bad cuts
Oblique Rough Warped
90°
Fig. 7.4
Step2: Remove burrs.
Burrs can aect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1. Hold the pipe at a downward angle to
prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Refrigerant Piping Connection
Size of joint pipes for indoor unit
Size of joint pipes for 410A indoor unit
Table 7.3
Size of joint pipes for outdoor unit
Base on the following tables, select the diameters
of the outdoor unit connective pipes. In case of the
main accessory pipe larger than the main pipe, take
the larger one for the selection.
Step1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
2. Using a pipe cutter, cut the pipe a little
longer than the measured distance.
Refrigerant Piping Connection Instructions
CAUTION
• The branching pipe must be installed
horizontally. An angle of more than 10° may
cause malfunction.
• DO NOTinstall the connecting pipe until both
indoor and outdoor units have been installed.
• Insulate both the gas and liquid piping to
prevent water leakage.
Page 20 
Table 7.2
Permitted length
Piping
length
Total piping length 18K+18K 98’/30m L+Max
(L1, L2)
24K+24K
30K+30K
164’/50m
(farthest distance from
the line pipe branch)
49’/15m L1, L2
(farthest distance from
the line pipe branch)
32.8’/10m L1-L2
Drop
height
Drop height between
indoor and outdoor unit
65.6’/20m H1
Drop height between
two indoor units
1.6’/0.5m H2
Gas side
Capacity
of indoor
unit (A)
Size of main pipe(mm)
Liquid side
Ø0.5”(12.7)
Ø0.626”(15.9)
Ø0.626”(15.9)
Ø0.25”(6.35)
Ø0.375”(9.5)
Ø0.375”(9.5)
18K
24K
30K
CE-FQZHN-01C
CE-FQZHN-01C
Available
branching pipe
CE-FQZHN-01C
Model
Gas side Liquid side
Ø0.626”(15.9)
Ø0.626”(15.9)
Ø0.626”(15.9)
Ø0.375”(9.5)
Ø0.375”(9.5)
Ø0.375”(9.5)
the size of main pipe(mm)
36K
48K
60K
Size of joint pipes for 410A outdoor unit
Table 7.4
The 1st branching pipe
CE-FQZHN-01C
CE-FQZHN-01C
CE-FQZHN-01C