Argo X3I ECO SD27HL User manual

DUCTED TYPE INDOOR UNITS
with adjustable external static pressure
Thank you for choosing an Argoclima commercial air conditioner. Please read this manual carefully before using the unit and
retain it for future reference.
V 11/21
Installation Manual
MODELS:
X3I ECO SD27HL
X3I ECO SD35HL
X3I ECO SD50HL
X3I ECO SD70HL
Thank you for choosing an Argoclima commercial air conditioner. Please read this manual carefully before using the unit and
retain it for future reference.
V 07/22

Contents
ⅠSafety Precautions ................................................................................................... 1
ⅡInstallation Location and Matters Needing Attention................................................. 3
1 How to select the installation location for the indoor unit ................................... 3
2 Electric Wiring.................................................................................................... 4
3 Earthing Requirements ...................................................................................... 4
4 Accessories for Installation ................................................................................ 4
ⅢInstallation Instructions ............................................................................................. 5
1 Outline Dimension Drawings of the Indoor Unit ................................................. 5
2 Dimension Requirements on the Installation Space of the Indoor Unit .............. 6
3 Installation of the Indoor Unit ............................................................................. 6
4 Horizontality Check of the Indoor Unit ............................................................... 8
5 Installation of the Air Supply Duct ...................................................................... 8
6 Drawings of the Air Supply Outlet and Return Air Inlet..................................... 10
7 Installation of the Return Air Duct .................................................................... 10
8 Installation of the Condensate Pipe ................................................................. 11
9 Design of the Drain Pipe.................................................................................. 12
10 Installation of the Drain Pipe .......................................................................... 12
11 Precautions for the Lift Pipe ........................................................................... 13
12 Test for the Drainage System......................................................................... 14
13 Piping............................................................................................................. 15
14 Insulation for the Refrigerant Pipe ................................................................. 16
15 Wiring between the Wire and the Wiring Terminal ......................................... 16
16 Wiring of the Power Cord (single-phase) ....................................................... 18
17 Setting of External Static Pressure ................................................................ 19
18 Electric Installation ......................................................................................... 19
ⅣRated Working Conditions ..................................................................................... 20
ⅤError Analysis ......................................................................................................... 20
ⅥMaintenance........................................................................................................... 22
ⅥI Safety operation of flammable refrigerant. ........................................................... 23

User Notice
◆The total capacity of the indoor units which runs at the same time can not
exceed 150% of that of the outdoor units; otherwise, the cooling (heating) effect of each
indoor unit would be poor.
◆Switch the main power on 8 hours before start the unit, helpful for a successful
startup.
◆It is a normal phenomenon that the indoor unit fan will still run for 20~70
seconds after the indoor unit receives the “stop” signal so as to make full use of
after-heat for the next operation.
◆When the running modes of the indoor and outdoor units conflict, it will be
indicated on the display of the wired controller in five seconds and then the indoor unit
will stop. In this case, they can back to the normal condition by harmonizing their
running modes: the cooling mode is compatible with the dehumidifying mode and the
fan mode can go with any other mode. If the supply power fails when the unit is running,
then the indoor unit will send the “start” signal to the outdoor unit three minutes later
after power recovery.
◆During installation, the communication cable and the power cord must not be
twisted together but instead separated with an interval of at least 2cm; otherwise the
unit is likely to run abnormally.
◆This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the appliance
by a person responsible for their safety. Children should be supervised to ensure that
they do not play with the appliance.
◆If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
◆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 shall not play
with the appliance. Cleaning and user maintenance shall not be made by children
without supervision.

◆If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Correct Disposal of this product
◆The appliance shall be installed in accordance with national wiring regulations.
R32:675
Please notice that the unit is filled with flammable gas R32. Inappropriate
treatment of the unit involves the risk of severe damages of people and
material. Details to this refrigerant are found in chapter “refrigerant”.
Appliance shall be installed, operated and stored in a room with a floor area
larger than Xm2 .
(Please refer to table "a" in section of " Safety operation of
flammable refrigerant " for Space X.)
This marking indicates that this product should not be disposed
with other household wastes throughout the EU. To prevent possible
harm to the environment or human health from uncontrolled waste
disposal, recycle it responsibly to promote the sustainable reuse of
material resources. To return your used device, please use the return
and collection systems or contact the retailer where the product was
purchased. They can take this product for environmental safe
recycling.

Appliance filled with flammable gas R32.
Before use the appliance, read the owner’s manual first.
Before install the appliance, read the installation manual first.
Before repair the appliance, read the service manual first.
The Refrigerant
To realize the function of the air conditioner unit, a special refrigerant circulates in
the system. The used refrigerant is the fluoride R32, which is specially cleaned.
The refrigerant is flammable and inodorous. Furthermore, it can lead to explosion
under certain conditions. But the flammability of the refrigerant is very low. It can
be ignited only by fire.
Compared to common refrigerants, R32 is a nonpolluting refrigerant with no harm
to the ozonosphere. The influence upon the greenhouse effect is also lower. R32
has got very good thermodynamic features which lead to a really high energy
efficiency. The units therefore need a less filling.
WARNING：
Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacture. Should repair be necessary, contact your nea-
rest authorized Service Centre. Any repairs carried out by unqualified personnel
may be dangerous. The appliance shall be stored in a room without continuously
operating ignition sources. (for example: open flames, an operating gas appliance
or an operating electric heater.) Do not pierce or burn.
Appliance shall be installed, operated and stored in a room with a floor area larger
than Xm
2
.
(Please refer to table "a" in section of " Safety operation of flammable
refrigerant " for Space X.)
Appliance filled with flammable gas R32. For repairs, strictly follow manufacturer’s
instructions only. Be aware that refrigerants may not contain an odour. Read specialist’s
manual.

Ducted indoor units with adjustable ESP
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Ⅰ Safety Precautions
Please read this manual carefully before use and operate correctly as instructed in
this manual.
Please especially take notice of the following two symbols：
Warning! It indicates improper operation which will lead to human casualty or
sever injury.
Caution! It indicates improper operation which will lead to injury or property
damage.
Warning!
◆The installation should be committed to the appointed service center; otherwise
it all cause water leakage, electric shock or fire etc.
◆Please install the unit where is strong enough to withstand the weight of the unit;
otherwise, the unit would fall down and cause injury or death.
◆The drain pipe should be installed as instructed in the manual to guarantee the
proper drainage; meanwhile it should be insulated to prevent condensing; otherwise the
improper installation would cause water leakage and then wet the household wares in
the room.
◆Do not use or place any inflammable or explosive substance near the unit.
◆Under the occurrence of an error (like burning smell etc.), please cut off the main
power supply of the unit.
◆Keep good ventilation in the room to avoid oxygen deficit.
◆Never insert your finger or any other object into the air outlet/inlet grille.
◆Please take notice of the supporting frame of the unit to see if it is damaged over
the long time period of use.
◆Never refit the unit and contact the sales agent or the professional installation
personnel for the repair or relocation of the unit.
An all-pole disconnection switch having a contact separation of at least 3mm in all
poles should be connected in fixed wiring.
Caution!
◆Before installation, please check if the power supply corresponds with the

2
requirement specified on the nameplate and also check its security.
◆Before use, please check if the piping and wiring are correct to avoid water
leakage, refrigerant leakage, electric shock, fire etc.
◆The main power supply must be earthed to avoid the hazard of electric shock
and never connect this earth wire to the gas pipe, running water pipe, lightening rod or
phone cable’s earth lead.
◆Turn off the unit after it runs at least five minutes; otherwise its service life will be
shortened.
◆Do not allow children operate this unit.
◆Do not operate this unit with wet hands.
◆Cut off the main power supply prior to the cleaning of the unit or the replacement
of the air filter.
◆When the unit is not to be used for a long time, please cut off the main power
supply of the unit.
◆Do not expose the unit to the moist or corrosive circumstances.
◆After the electric installation, please take an electric leakage test.
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ⅡInstallation Location and Matters Needing Attention
The installation of the unit must comply with the national and local safety
regulations. The installation quality directly affects the normal use, so the user
should not carry out the installation personally. Instead, the installation and
debugging should be done by the professional personnel. Only after that, can the
unit be energized.
1How to select the installation location for the indoor
unit
a. Where there is no direct sunlight.
b. Where the top hanger, ceiling and the building structure are strong enough to
withstand the weight of the unit.
c. Where the drain pipe can be easily connected to outside.
d. Where the flow of the air inlet and outlet are not blocked.
e. Where the refrigerant pipe of the indoor unit can be easily led to outside.
f. Where there is no inflammable, explosive substances or their leakage.
g. Where there is no corrosive gas, heavy dust, salt mist, smog or moisture.
CAUTION！
The unit which is installed in the following places is likely to run abnormally. If
unavoidable, please contact the professional personnel at the appointed service center
：
①Where is full of oil;
②Alkaline soil off the sea;
③Where there is sulfur gas(like sulfur hot spring);
④Where there are devices with high frequency (like wireless devices, electric
welding devices, or medical equipments);
⑤Special circumstances.
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2 Electric Wiring
a. The installation must be done in accordance with the national wiring regulations.
b. Only the power cord with the rated voltage and exclusive circuit for the air
conditioning can be used.
c. Do not pull the power cord by force.
d. The electric installation should be carried out by the professional personnel as
instructed by the local laws, regulations and also this manual.
e. The diameter of the power cord should be large enough and once it is damaged
it must be replaced by the dedicated one.
f. The earthing should be reliable and the earth wire should be connected to the
dedicated device of the building by the professional personnel. Besides, the air switch
coupled with the leakage current protection switch must be equipped, which is of
enough capacity and of both magnetic and thermal tripping functions in case of the
short circuit and overload.
3 Earthing Requirements
a. The air conditioner is classified into the Class I appliances, so its earthing must
be reliable.
b. The yellow-green line of the air conditioner is the earth line and can not be used
for other purpose, cut off or fixed by the self-tapping screw; otherwise it would cause
the hazard of electric shock.
c. The reliable earth terminal should be provided and the earth wire can not be
connected to any of the following places：
①Running water pipe;
②Coal gas pipe;
③Sewage pipe;
④Other places where the professional personnel think unreliable.
4 Accessories for Installation
Refer to the packing list for the accessories of the indoor and outdoor units
respectively.
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Installation Instructions
1 Outline Dimension Drawings of the Indoor Unit
Note: the unit in the followings figures is mm, unless otherwise specified.
Fig.1 is applicable to
09K、12K、18K、24K
Fig.1
Table 1: Outline Dimensions:
A
B
C D
E F
Unit: mm
Item
Model A B C D E F
760415710200
09K、12K
18K
24K
450474
1060 415 1010 200450474
942 530 900 260 655 685
Ⅲ
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2 Dimension Requirements on the Installation Space of
the Indoor Unit
Fig. 2
mm
mm
3 Installation of the Indoor Unit
a. Requirements on the Installation Location
1) Ensure the hanger is strong enough to withstand the weight of the unit.
2) The drainage of the drain pipe is easy.
3) No obstacle is in the inlet/outlet and the air circulation is in good condition.
4) Ensure the installation space shown in Fig.2 is left for the access to maintenance.
5) It should be far away from where there is heat source, leakage of inflammable,
explosive substances, or smog.
6) It is the ceiling type unit (concealed in the ceiling).
7) The power cords and connection lines of the indoor and outdoor units must be
at least 1m away from the TV set or radio to avoid the image interference and noise
( even if 1m is kept, the noise may be produced due to the strong electric wave).
b. Installation of the Indoor Unit
1) Insert the M10 expansion bolt into the hole, and then knock the nail into the
bolt. Refer to the Outline Dimension Drawings of the Indoor Unit for the distance
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between holes and see Fig.3 for the installation of the expansion bolt.
Fig.3 Fig.4
Install the hanger on the indoor unit, as shown n Fig.4.
Install the indoor unit on the ceiling, as shown in Fig.5.
Fig.5
CAUTION！
①.Prior to the installation, please make a good preparation for all piping
(refrigerant pipe, drain pipe) and wiring (wires of the wired controller, wires between the
indoor and outdoor unit) of the indoor unit to make the further installation much easier.
②.If there is an opening in the ceiling, it is better to reinforce it to keep it flat and
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prevent it vibrating. Consult the user and builder for more details.
③.If the strength of the ceiling is not strong enough, a beam made of angle iron
can be used and then fix the unit on it.
④.If the indoor unit is not installed in the air conditioning area, please use sponge
around the unit to prevent condensing. The thickness of the sponge depends on the
actual installation environment.
4 Horizontality Check of the Indoor Unit
After the installation of the indoor unit, its horizontality must be checked to make
sure the unit keep horizontal fore and aft and keep an inclination of 5° toward the drain
pipe right and left, as shown in Fig.6.
Fig.6
5 Installation of the Air Supply Duct
a.Installation of the Rectangular Air Supply Duct
Fig.7
Table 2
No.
Name
No.
Name
1
Hanger
5
Filter Screen
2
Return Air Duct
6
Main Air Supply Duct
3
Canvas Duct
7
Air Supply Outlet
4
Return Air Inlet
8
Plenum Box
b.Installation of the Round Air Supply Duct
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Fig.8
No.
Name
No.
Name
1
Hanger
6
Transition Duct
2
Return Air Duct
7
Air Supply Duct
3
Canvas Duct
8
Diffuser
4
Return Air Louver
9
Diffuser Joint
5
Air Supply Outlet
Table 3
c.Installation Steps of the Round Air Supply Duct
1) Preinstall the outlet of the round duct on the transition duct and then fix it by the
self-tapping screw.
2) Place the transition duct to the air outlet of the unit and fix it with rivet.
3) Connect the outlet to the duct and then tighten them with tape. Other installation
details are not covered herein.
CAUTION！
①.The maximum length of the duct means the maximum length of the air supply
duct plus the maximum length of the return air duct.
②.For the unit with the auxiliary electric heating function, if the round duct is to be
adopted, then the straight length of the transition duct can not be less than 200mm.
③.The duct is either rectangular or round and connected with the air inlet/outlet of
the indoor unit. Among all air supply outlets, at least one should be kept open. As for
the round duct, it needs a transition duct of which the size should match with the air
supply outlet of the unit. After the fitting of the transition duct, it is the turn of the round
duct, which is better to be kept 10 meters far away from the corresponding diffuser. The
standard accessories supplied is the transition duct 200mm long and round air outlet
φ200, however, those of other specifications can be purchased.
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capacity:2.5~6.0kW
6 Drawings of the Air Supply Outlet and Return Air Inlet
Fig.9 Air Supply Outlet Fig.10 Return Air Inlet
Table 4 Dimensions of the Air Supply Outlet and Return Air Inlet (unit: mm)
a.
7 Installation of the Return Air Duct
Fig.11
b.
The default installation location of the rectangular flange is in the back and the
return air cover plate is in the bottom, as shown in Fig.11.
c.
flange and the return air cover plate.
If the downward return air is desired, just change the place of the rectangular
Connect one end of the return air duct to the return air outlet of the unit by rivets
Item
Model
Dimension of air outlet flange Dimension of air return
A B C D
122 585 200 710
122
219
885
743
200
260
1010
900
09K、12K
18K
24K
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and the other to the return air louver. For the sake of the convenience to freely adjust
the height, a cutting of canvas duct will be helpful, which can be reinforce and folded by
８＃iron wire.
d. More noise is likely to be produced in the downward return air mode than the
backward return air mode, so it is suggestive to install a silencer and a plenum box to
minimize the noise.
e. The installation method can be chose with considering the conditions of the
building and maintenance etc., as shown in Fig.12.
Fig.12
Table 5 Parts and Components of the Return Air Duct
No.
Name
No.
Name
1
Return Air Louver(with the filter screen)
4
Indoor Unit
2
Canvas Duct
5
Air Supply Duct
3
Return Air Duct
6
Access Grille
8 Installation of the Condensate Pipe
a. The condensate pipe should keep a inclination angle of5～10°, which can
facilitate the drainage of the condensate water. And the joints of the condensate pipe
should be insulated by the insulation material to prevent condensing(see Fig.13).
Fig.13 Thermal Insulation of the Condensate Pipe
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b. There is a condensate outlet on both left and right sides of the unit. Once one is
confirmed to be used, the other should be clogged by a rubber plug, bundled by the
binding wire and insulated by the insulation material to avoid water leakage.
c. The right outlet is defaulted to be clogged with a plug.
CAUTION！
No water leakage is allowed on the joint of the condensate pipe.
9 Design of the Drain Pipe
a. The drain pipe should always keep an inclination angle(1/50～1/100) to avoid
the water gathering in some certain place.
b. During the connection of the drain pipe and device, do not impose too much
force on the pipe on one side of the device and the pipe should be fixed as close as to
the device.
c. The drain pipe can be the ordinary hard PVC pipe which can be purchased
locally. During the connection, inset the end of the PVC pipe to the drain outlet, then
tighten it with the drain hose and binding wire but never connect the drain outlet and the
drain hose by adhesive.
d. When the drain pipe is used for multiple devices, the public section of the pipe
should be 100mm lower than the drain hole of each device and it is better to use the
much thicker pipe for such a purpose.
10 Installation of the Drain Pipe
a. The diameter of the drain pipe should be larger or equal to that of the refrigerant
pipe (PVC pipe, outer dimater:25mm, wall thickness≥1.5mm.
b. The drain pipe should be as short as possible and with at least a 1/100 degree of
slope to avoid forming air pockets.
c. If the proper degree of slope of the drain pipe is not allowed, a lift pipe should be
installed.
d. A distance 1-1.5m should be kept between the hangers to avoid the drain hose
making a turn.
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(Right) with a min. degree of slope 1/100
(Wrong)
Fig.14
e. Insert the drain hose into the drain hole and tighten it with clamps.
f. Wrap the clamps with large amount of sponge for thermal insulation.
g. The drain hose inside the room also should be insulated.
Fig.15
11 Precautions for the Lift Pipe
The installation height of the lift pipe should be less than 850mm. It is
recommended to set an inclination angle 1°～2° for the lift pipe toward the drainage
direction. If the lift pipe and the unit form a right angle, the height of the lift pipe must be
less than 800mm.
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Fig.16
Notes:
①.The inclination height of the drain hose should be within 75mm so that the outlet
of the drain hose does not suffer the external force.
②.If multiple drain pipes converge, please follow the installation steps below.
Fig.17
12 Test for the Drainage System
a. After the electric installation, please take a test for the drainage system.
b. During the test, check if the water flow goes through the pipe correctly and
observe carefully the joint to see if it leaks or not. If this unit is installed in the newly built
house, it is suggested to take this test prior to the ceiling decoration.
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13 Piping
a. Let the flare end of the copper pipe point at the screw and then tighten the screw
by hand.
b. After that, tighten the screw by the torque wrench unit it clatters (as shown in
Fig.18).
Fig.18
Table 6 Moments of Torque for Tightening Screws
Diameter of Pipe(mm)
Moment of Torque (N·m)
15-30
35-40
45-50
60-65
a. The bending degree of the pipe can not be too small; otherwise it will crack. And
please use a pipe bender to bend the pipe.
b. Wrap the exposed refrigerant pipe and the joints by sponge and then tighten
them with the plastic tape.
CAUTION！
①.During the connection of the indoor unit and the refrigerant pipe, never pull any
joints of the indoor unit by force; otherwise the capillary pipe or other pipe may crack,
which then would result in leakage.
②.The refrigerant pipe should be supported by brackets, that is, don’t let the unit
withstand the weight of it.
Φ 6.35(1/4)
Φ 9-9.52(3/8)
Φ 12(1/2)
Φ 15.9(5/8)
Ducted indoor units with adjustable ESP