CLIVET Q4DN-2-XMi Series User manual

M0VY00002-01 - 12/2020
4-WAY CASSETTE
Q4DN-2-XMi series D28÷D140
MANUAL
FOR INSTALLATION,
USE AND MAINTENANCE

2
INTRODUCTION
Dear Customer,
Thank you for choosing a CLIVET product.
The model which you have chosen is a high performance product of advanced design and technology, high reliability
and quality construction.
We suggest that you entrust its management and maintenance to professionally qualified personnel you trust, who,
when necessary, only use original spare parts.
This manual contains important information and tips that must be followed for easier installation and the best possible
use of the appliance.
SERIES
VRF systems
4-WAY CASSETTE unit from D28 to D140
SYMBOLS USED IN THE MANUAL AND THEIR MEANING
l
WARNING
To indicate special information.
m
CAUTION
To indicate particularly important and delicate operations.
a
CAUTION DANGER
To indicate actions which, if not carried out correctly, may result in general accidents or may cause malfunctions
or material damage to the appliance; therefore, they require special attention and adequate preparation.
f
ATTENTION ELECTRIC DANGER
To indicate actions which, if not carried out correctly, may result in accidents of electrical origin; therefore,
they require special attention and adequate preparation.
d
IT IS PROHIBITED TO
indicate actions that MUST NOT be performed.
WARRANTY
The product CLIVET is covered by a conventional warranty, valid from the date of purchase of the appliance,
the conditions of which are specified in the GENERAL CONDITIONS OF SALE available at www.clivet.com
l
WARNING
– The warranty is void if the appliance has been used without following the instructions in this manual.
– The warranty will be forfeited if the customer makes changes and/or attempts to repair the product himself
or through third parties not authorised by the manufacturer/authorised dealer.
– The product must be intended for the use intended by CLIVET for which it was expressly made.
Any contractual and non-contractual liability CLIVET for damage caused to persons, animals or property by
installation, adjustment, maintenance and misuse errors is excluded.

3
INDEX
1 General Details .............................................. 4
1.1 General warnings and safety rules 4
1.2 Description of system components 8
1.3 Accessories 9
1.4 Identification 9
2 Installation...................................................... 10
2.1 Product receiving 10
2.2 Size and weight 10
2.3 Installation - preliminary warnings 10
2.4 Installation 11
2.4.1 Installation room 11
2.4.2 Hang the indoor unit 14
2.4.3 Derived ducts 17
2.4.4 Preparation for connection pipes 18
2.4.5 Drainage pipe 18
3 Electrical connections................................... 21
3.1 Preliminary information 21
3.2 Power cable connection 22
3.2.1 Electrical wiring specifications 22
3.3 Communication wiring 23
3.3.1 Communication wiring between the
indoor and outdoor units 24
3.3.2 Communication wiring between the
indoor unit and the wired controller 24
3.4 Assembling the panel 26
4 Configuration ................................................. 29
4.1 Power setting 29
4.2 Address setting 29
4.3 DIP Switch settings on main board 30
5 Running the test ............................................ 31
5.1 Checks to perform before running the test 31
5.2 Running the test 31
6 Use................................................................... 32
6.1 Description of system components 32
6.2 Operation 33
6.2.1 Meaning of the display codes 33
6.3 Other functions 33
6.4 Airflow angle control 34
7 Maintenance................................................... 35
7.1 Cleaning the indoor unit 35
7.2 Cleaning the air filter 35
7.3 Extended periods of inactivity 36
7.4 Maintenance at the start of the season 36
7.5 Troubleshooting 37
7.5.1 Common problems 37
7.5.2 Anomalies and remedies 38
7.6 Indoor unit error codes 39
8 Disposal .......................................................... 40
9 Attachments ................................................... 41
9.1 Indoor unit wiring diagrams 41
9.2 Declaration of conformity 43
Section dedicated to the USER

4
General Details
1 GENERAL DETAILS
1.1 General warnings and safety rules
l
WARNING
– This manual is the property of CLIVET and reproduction or transfer to third parties of the contents of this
document is prohibited. All rights reserved. It is an integral part of the product; make sure that it is always
supplied with the appliance, even in case of sale/transfer to another owner, so that it can be consulted by
the user or by personnel authorised to carry out maintenance and repairs.
– Read this manual carefully before using the appliance to ensure its safe operation.
– Periodically check the integrity of the power cable. If the power cable is damaged, it may only be replaced
by the manufacturer or the local distributor who sold the appliance or by authorised maintenance and repair
personnel.
– Installation must be in accordance with the IEC 61000-3-12 standard.
– The installation must be carried out by an authorised dealer or a qualified technician. Incorrect installation
may cause water leakage, electric shock and fire, or cause the appliance to malfunction.
– The installation must be carried out according to the instructions provided. An incorrect installation may
cause water leaks, electric shock or fire.
– Perform the installation using only the supplied accessories and parts specified. The use of non-standard
components may cause water leakage, electric shock or fire and cause the unit to malfunction.
– Work on the refrigerant circuit must only be carried out by persons with a valid certification, issued by
an accredited body, certifying their competence to handle refrigerants safely in compliance with the
specifications in force in the sector.
– Use a vacuum pump with a non return valve to evacuate the system. Do not perform an air purge using
refrigerant.
– Use deoxidised phosphorous copper piping for the refrigerant (seamless copper alloy piping and tubing).
Keep the inner and outer surface of the pipes clean and free of contaminants.
– Store the piping indoors and keep both ends of the pipes sealed until it is time to flare or weld.
– Do not use any means other than those recommended by the manufacturer to accelerate the defrosting
process or to clean the unit.
– The appliance must be placed in a room that does not contain any ignition sources (e.g. open flames,
gas appliances or electric heaters).
– Weld the pipes purging with nitrogen to avoid oxidation.
– Keep the interconnection cable away from the copper pipe. The temperature of the refrigerant circuit is high.
– Note that the refrigerants are odourless.
– Use only the refrigerants indicated in the manual.
– Recharge the refrigerant when it is in the liquid state.
– After installation, verify that there are no refrigerant leaks.
– Do not touch the components of the refrigerant line during or immediately after operation of the appliance.
There is a risk of burns or frostbite.
– Install the connection joints and manifolds referring to the installation manual.
– Install the drainage pipe according to the instructions in this manual. Incorrect draining can cause water
seepage or flooding with possible damage to the home and other property.
– Insulate the piping to avoid condensation.

5
General Details
– Always use the specified cables for all electrical work. Connect the cables securely and secure them
in a stable manner to prevent the terminals from being damaged by external forces. Incorrect electrical
connection may cause overheating conditions and may result in fire and electrocution.
– Install the electrical cables making sure that they are not taut. Otherwise, they could break or overheat
causing smoke or fire.
– The cables must be arranged so that the control board cover can close properly. If the control board cover
is not closed properly, corrosion may occur and the connection points on the terminals may become hot,
ignite or cause electric shock.
– Always disconnect all power supply circuits before touching the terminals for any reason.
– It is advisable to install a Class B or F differential magnetothermic circuit breaker on the power supply line
of the appliance.
– For electrical work, comply with the provisions of the national electrical code, local regulations, current
regulations and the requirements contained in the installation manual. It is necessary to use an independent
circuit and a single power supply socket. Do not connect other appliances to the same electrical outlet.
Insufficient electrical capacity or faulty electrical installation may cause risk of electric shock or fire.
– Incorporate in the wiring an omnipolar isolator switch with a separation distance of at least 3mm between all
poles and a residual current device (RCD) with a value greater than 10mA. Observe the domestic regulations.
– Replace the fuses only with others of the same value and technical characteristics.
– Install the appliance and its power cables at least one metre away from other electrical equipment in order
to avoid interference or noise.
– The appliance must be stored in such a way as to prevent any mechanical damage.
– Consult a qualified technician for unit repair or maintenance.
– Do not modify or alter the safety or protection devices.
– Do not touch the appliance with wet or damp parts of the body as to do so could lead to electric shock.
– Make sure that the power is disconnected before performing any service or maintenance.
– If you notice any anomalies (e.g. a burning smell), stop the appliance, turn off the power switch and consult
your dealer.
– Make sure that the air inlet and outlet are not blocked as this could trigger the protective device that stops
the appliance.
– This appliance is intended for use on commercial premises by experienced or suitably trained users
– This appliance is designed to cool or heat spaces intended for the presence of human beings. It must not
be used to cool or heat food, plants, animals, machinery, equipment or works of art.
– Read this manual carefully before using the appliance to ensure its safe operation.

6
General Details
a
CAUTION DANGER
– When connecting refrigerant piping,keep substances or gases other than the specified refrigerant from entering
the unit. The presence of other gases or substances can reduce unit performance and cause an abnormal
increase in pressure in the refrigeration cycle. This can lead to explosion hazards and resulting injuries.
– Install the unit on a stable stand that can support its weight. If the chosen stand cannot support the weight of
the unit, or if the installation is not performed correctly, the unit may fall and cause injury and serious damage.
– Do not pierce or ignite the appliance.
– The appliance must be placed in a well-ventilated room whose dimensions correspond to those specified
for operation.
– The product must be installed with earthing in accordance with the law to avoid the risk of electrocution.
Do not connect the earth cable to gas or water mains, lightning rods or phone earth cables.
– Install an earthing connection switch. Failure to install this can result in electric shock.
– Do not operate the appliance if the protections have been removed.
– Do not install the unit:
- in a location that can be exposed to combustible gas leaks. Any accumulation of combustible gas around
the unit may cause a fire hazard;
- near the coast (except in the case of corrosion resistant models);
- near a source of hot water due to the presence of caustic gas in the air;
- in the presence of strong electromagnetic waves;
- in the presence of significant voltage flicker;
- in the presence of acid or alkaline liquid that evaporates;
- in the presence of flammable materials or gas.
– Wear the required PPE (protective gloves) during installation and maintenance. High pressure piping poses
a risk of burns during operation.
– Measure the insulation resistance and make sure it is at least 1M Ωonce the wiring work is done.
– Do not use flammable paints, enamels, sprays or other products that may release flammable fumes or
vapours near the appliance as they could cause fires.
– Do not install open flame units near the appliance. The heat released could ruin it.
– Do not insert your fingers between the fans during operation. This could lead to injury.
– Do not allow children to play near the unit as it may cause injury.

7
General Details
d
IT IS PROHIBITED TO
– Make changes and/or repair attempts to the product. Any repairs must be carried out by a qualified
technician.
– Touch the appliance with wet, damp and/or barefoot body parts. If you notice current leakage that can be
detected on contact with metal parts of the appliance, disconnect the switch, unplug it from the power
supply socket and contact an authorised dealer.
– Disperse in the environment and leave within the reach of children the packaging material as it may be a
potential source of danger. It must therefore be disposed of in accordance with current legislation.
– Use the same electrical outlet for other appliances. Incorrect or insufficient power supply may cause fire or
electric shock hazard.
– Connect the electric air conditioner to the power supply before having finished wiring the power lines and
pipes. Connect the cables of the outdoor unit and then those of the indoor unit.
– Perform maintenance in the rain. Electrical leakage, electric shock, short circuit, malfunction, smoke or fire
may occur.
m
Notes on fluorinated gases
– This air conditioner contains fluorinated gas. For specific information on gas types and quantities, please
refer to the plate found on the unit. It is always necessary to comply with national regulations regarding the
use of gases.
– Installation, service, maintenance and repair of the unit must be performed by a qualified technician.
– The uninstallation and recycling of the product must be carried out by qualified technical personnel.
– If a leak detection device is installed in the system, it is necessary to check that there are no leaks at least
every 12 months. When checking the unit for leaks, it is recommended to keep a detailed record of all
inspections.
– Pay attention to the fact that refrigerant R410A is odourless.

8
General Details
1.2 Description of system components
3
4
5
1
2
Fig. 1
1 Ventilation louver
2 Display LED
3 Front grille
4 Air outlet
5 Air inlet
l
WARNING
The images in this manual are provided for illustrative purposes only. The appearance of your appliance may
differ slightly from the illustrations shown here. Refer to the actual characteristics of the unit.

9
General Details
1.3 Accessories
The air conditioning system is provided with the following
accessories. Use all specified installation components
and accessories to install it.
Description Aspect Quantity
Installation template 1
Foam (250x250x8) 1
Foam (60x100x5) 1
Cable tie 6
Insulation for copper
piping 2
Insulation for water
drain piping 1
Hose clamp 1
Cable tie for water
drain piping 5
Flexible water drain
hose 1
M6 bolt 4
Brass nut 2
D1D2 auxiliary
connector 1
Installation manual 1
Accessories not supplied
Description Aspect Notes
Copper piping
Use to connect
the internal
refrigerant
piping.
PVC water drain
piping
(outer Ø: 37-39 mm,
inner Ø: 32 mm)
Use to drain
condensate
from the indoor
unit.
Piping insulation
Protect the
piping from
condensate.
Hook with M10
expansion bolt
4 for indoor unit
installation
M10 rods 4 for indoor unit
installation
1.4 Identification
The indoor unit can be identified by the serial number
label that shows the technical and performance data of the
appliance and what is required by the legislation in force.
Serial number label
Fig. 2
m
CAUTION
Tampering, removal, lack of identification
labels or anything else that does not allow safe
product identification, makes any installation
and maintenance operation difficult.

10
Installation
2 INSTALLATION
2.1 Product receiving
The appliance is supplied packed in several parcels.
Handling must be carried out by appropriate means in
view of the overall weight of the package.
Upon receiving the appliance, check the perfect integrity
of all parts.
In case of damage to the appliance or missing material,
please contact your authorised dealer promptly.
l
WARNING
The manual is an integral part of the product
and therefore it is recommended that you
read it before installing and commissioning
the appliance and keep it with care for future
reference or transfer to another Owner or User.
d
IT IS PROHIBITED TO
disperse the packaging material in the
environment and leave it within the reach
of children as it can be a potential source of
danger. It must be disposed of in accordance
with current legislation.
l
WARNING
During all handling operations, use the
appropriate PPE such as hard hat, gloves and
safety shoes.
2.2 Size and weight
Width
(mm)
Depth
(mm)
Height
(mm)
Weight
(kg)
D28 840 840 230 21.3
D36 840 840 230 21.3
D45 840 840 230 23.2
D56 840 840 230 23.2
D71 840 840 230 23.2
D80 840 840 230 23.2
D90 840 840 300 28.4
D100 840 840 300 28.4
D112 840 840 300 28.4
D140 840 840 300 30.7
Panel 950 950 70 5.8
m
CAUTION
Handle the appliance with the hooks. Do not
exert any force on other parts of the unit,
especially on refrigerant and water drain pipes
and plastic parts.
2.3 Installation - preliminary warnings
l
WARNING
Before installing the indoor unit, consult the
label on the product package to check that the
model number matches the model number of
the outdoor unit.
m
CAUTION
All installation operations must be carried out
with the appliance completely stopped and
after disconnecting all external power supplies.
Before any installation work, pay close
attention to the labels on the appliance.
During the activities you must not tamper with
or disconnect safety devices for any reason,
create by-passes, or use them for purposes
other than those envisaged by the manufacturer.
Below are the guidelines for achieving a compliant
installation.
Identify a suitable area for installation.
See “Installation room” page 11.
Put the appliance in place.
See “Hang the indoor unit” page 14.
Lay the refrigerant piping.
Perform correct installation of the condensate
drain piping.
Clean the refrigerant piping.
Make the refrigerating connections.
Test the tightness of the system at the pressures
indicated by the manufacturer.
Carry out the correct pressurisation of the
system.
Carry out the electrical wiring, configurations
and addressing according to the diagrams
provided.
See “Electrical connections” page 21.

11
Installation
f
ATTENTION ELECTRIC DANGER
– All electrical connections must be done by a
licensed electrician according to the provisions
of national and local electrical codes.
– All electrical connections must be made
according to the wiring diagram on the
panels of the indoor and outdoor units.
– If the electrical system has serious safety
problems, stop work immediately. Explain
the situation to the customer and refuse to
install the unit until the safety problem has
been resolved.
– The power supply should correspond to
90-100% of the rated voltage. Insufficient
power supply may cause malfunction,
electric shock or fire.
– If the power cables are permanently
installed connected to the electrical system,
install overcurrent protection and a main
power switch with a capacity of 1.5 times the
maximum current of the unit.
– The power supply line must have a special
protection upstream against short circuits and
earthing leakage that sections the system
with respect to other utilities. The technician
must choose an approved differential circuit-
breaker or main circuit breaker.
– Connect the unit to a single socket of a
dedicated branch of the circuit. Do not
connect other appliances to the same
electrical outlet.
– The air conditioner must be properly
grounded.
– All cables and conductors must be
connected securely. Loosening a conductor
may cause the terminal to overheat, which
in turn may result in fire hazards or product
malfunction.
– The electrical cables must not touch or rest
against the refrigerant pipes, the compressor
or any moving parts of the unit.
2.4 Installation
2.4.1 Installation room
m
CAUTION
The appliance must be placed in a well-
ventilated room, with a minimum surface
area that varies according to the amount of
refrigerant present.
The following information can help you choose a suitable
location.
The installation location must have the following
characteristics:
– good air circulation.
– ease of drainage.
– the noise emitted by the unit must not disturb other
people.
– stability and robustness - no exposure to vibration.
– sufficient capacity to support the weight of the
unit. If the structure is too weak, the unit can
fall and cause serious or fatal personal injury,
material damage and damage to the appliance.
– at least one metre away from any other electrical
device (e.g. TV, radio, computer).
– installation at a height of 2.5m to 3.5m off the
ground.
– if the indoor unit is installed on a metal bracket,
it must be earthed.
– the unit must be at least 1m away from the nearest
wall.
– the space must be sufficient for installation and
maintenance operations.
– the space must be sufficient for connection of the
piping and drain pipe.
– the ceiling must be horizontal and its structure
must be strong enough to support the weight of
the indoor unit.
– the air inlet and outlet must not be blocked.
– the airflow must be able to reach the whole room.

12
Installation
d
It is PROHIBITED to install the indoor
unit in the following locations:
– in a bathroom or laundry room, because
excess humidity can reduce its service life
and corrode the cables;
– near sources of heat, steam or combustible
gas;
– near flammable objects, such as curtains or
fabrics;
– near obstacles that could obstruct air
circulation;
– near the entrance;
– in an area that is not exposed to direct sunlight;
– areas exposed to strong electromagnetic
waves;
d
It is PROHIBITED to install the indoor
unit in the following locations:
– oil extraction drilling or fracking areas;
– coastal areas with extremely salty air;
– areas with an atmosphere impregnated with
caustic gases, for example near thermal
sources;
– areas subject to strong power fluctuations,
for example factories;
– enclosed spaces (cabinets, etc.);
– kitchens with natural gas cooker hobs;
– areas used for storing gas or flammable
materials.
Please refer to the following diagrams for installation distances:
950 (Panel)
150 ~ 200
400 ~ 500
400 ~ 500
950 (Panel)
> 1000
> 1000
> 1000
> 1000
Access for maintenance
Ceiling
Centre line for
maintenance access
(Keep in the same
position as the centre of
the indoor unit)
Fig. 3

13
Installation
Floor
Air outlet
Ceiling
910 mm (ceiling hole)
H
A
Panel
Connect to the water
pipe outlet Connect to the
refrigerant pipes (gas)
Connect to the
refrigerant pipes (liquid)
Air inlet Air outlet
Fig. 4
Model A (mm) H (mm)
≤8.0 kW 230 ≤260
≤9.0 kW 300 ≤330
Based on the layout of the installation room, determine the direction of air flow. See “Fig. 5” for the air flow direction diagram.
To lockout the air flow, a deflector must be inserted into the unit’s casing.
Unit body
Air deflector
Fig. 5
l
WARNING
– The deflector is not included.
– Remove the panel before installing the deflector.

14
Installation
2.4.2 Hang the indoor unit
Size:
105
840
840
70
950
950
680
780
A
B
Ø75 mm
air inlet
Ø32 mm (outer
diameter of water
drainage pipe)
Refrigerant pipe vent
(liquid side “C”)
Refrigerant pipe vent
(gas side “D”)
Rear view Side view
View from above
Model A
(mm)
B
(mm)
C
(mm)
D
(mm)
2.8-4.5 kW 230 126 Ø 6.35 Ø 12.7
5.6-8.0 kW 230 126 Ø 9.53 Ø 15.9
9.0-14.0 kW 300 197 Ø 9.53 Ø 15.9
Fig. 6

15
Installation
Ceiling
Anchor
rod
Hexagonal
nut
Panel Main unit
46 146 ≥30
Fig. 7
a
CAUTION DANGER
Before installing the indoor unit, remove
the packing elements (A) used for transport
purposes between the fan and the pipe fitting.
Do not start the unit without removing the
elements (A) so as not to damage the fan motor.
A
A
Fig. 8
1 Using the paper template provided, make a 910mm x
910mm hole in the ceiling.
2 The midpoint of the ceiling opening must correspond
to the centre of the indoor unit’s casing.
910mm
910mm
Ceiling
Pipes
Unit body
Hole in the centre of
the ceiling opening
Fig. 9
3 Reinforce the ceiling where necessary to stop it from
sagging.
4 Determine the length and direction of the pipes to be
installed and the wiring.
5 After choosing the installation position, put the
refrigerant piping, the drainage pipes and the internal
and external electrical lines in their respective
connection points before installing the appliance.
6 Locate and mark the position of the anchor rods in the
4 corners using the paper template provided.
7 Based on the type of ceiling and depending on the
weight of the indoor unit, provide a suitable rod
support system:
– Roof with wooden structure
Place the wooden assembly panel crosswise over
the roof beam, then install the anchor rods
Wooden assembly panel
Roof
beam
Ceiling
Anchor rod
Fig. 10
– New concrete slab
Embed the anchor rods.
(Insert with wings) (Sliding insert)
Fig. 11
Steel bar
Embedded anchor rod
Fig. 12

16
Installation
– Existing concrete slab
Install the suspension hook with expansion anchor
45~50 mm deep in the concrete to prevent it from
loosening.
Fig. 13
– Roof with steel structure
Install and use the angled steel brackets
Suspension bolt
Anchor rod
Angled steel support
bar
Fig. 14
8 Install the four anchor rods (M10).
9 Determine the length of the rods based on the height
of the ceiling. Remove the surplus part.
Fig. 15
a
CAUTION DANGER
The unit body must be aligned exactly with the
hole. Before proceeding, check that the hole
is the same size as the unit.
10 Assemble the indoor unit. Two people are needed
to lift and fasten the unit. Insert the anchor rods into
the unit’s attachment holes. Fasten them with washers
and hexagonal nuts.
Fig. 16
l
WARNING
The bottom of the unit must be 10-12 mm higher
than the false ceiling. In general, measurement
“L” must be half the length of the anchor rod or
be long enough to stop the nuts from coming off.
Main body
Wall
10-12mm
False ceiling
L
Fig. 17
a
CAUTION DANGER
Check that the unit is completely horizontal.
Incorrect installation can cause the drain pipe
to go back into the unit or possible water leaks.

17
Installation
Water level
Fig. 18
l
WARNING
Check that the indoor unit is horizontal.
The unit has a drain pump and a float switch. If
the unit tilts in the opposite direction to that of
the condensate flow (with the drain pipe side
raised), the float switch may not work properly
and cause a water leak.
11 Use the hexagonal nuts on the four assembly hooks
to adjust and ensure that the unit’s casing is level.
12 Adjust the position of the unit’s casing and ensure that
the gap with the ceiling is even on all four sides.
13 Once the position of the casing has been adjusted,
tighten the nuts to secure the unit.
NOTE FOR INSTALLATION IN NEW BUILDS
Main body
Installation
template
M6 x 12 bolts
Fig. 19
l
WARNING
When the unit is to be installed in a new build,
the hooks may already be fitted in the ceiling.
In this case, check that the hooks have not
come loose due to concrete shrinkage.
2.4.3 Derived ducts
These units can be fitted with small ducts for air
conditioning a small room nearby.
The units are designed for ducting on 3 sides: the side
with the electronic expansion valve cannot be ducted.
Distribution
duct
Distribution
duct
Distribution
duct
Outdoor
air
A
A
EF
B
B
D
C
C
58
Ø75
258
Fig. 20
Model A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
F
(mm)
2.8-8.0 kW 350 85 107 126 121 145
9.0-14.0 kW 350 155 107 197 121 145
Fig. 21
– If only one air duct is connected:
for 5.6~8.0 kW models, the volume of air in the
duct is about 300~360 m3/h.
for 9.0~14.0 kW models, the volume of air in the
duct is about 400~640 m3/h.
The air duct must not be longer than 2 metres.

18
Installation
– If two air ducts are connected:
for 5.6~8.0 kW models, the volume of air in the
duct is about 200~260 m3/h.
for 9.0~14.0 kW models, the volume of air in the
duct is about 300~500 m3/h.
The air duct must not be longer than 1.5 metres.
l
WARNING
If a duct is connected, the corresponding
louver on the panel must be plugged.
If the capacity of the unit is less than 5.6 kW,
no air duct can be connected.
2.4.4 Preparation for connection pipes
It is necessary to make a hole in the wall where the
refrigerant piping, drainage pipe and electrical cables
that will connect the indoor unit to the outdoor unit will
pass through.
1 Determine hole position in the wall according to the
position of the outdoor unit.
2 Drill the hole in the wall using a 65 mm drill bit.
The hole should have a slight inclination, so that the
outer end is lower than the inner one by about 12 mm.
This will facilitate water drainage.
Inside Outside
12 mm
Wall
Fig. 22
3 Insert the protective sleeve into the wall, which will
protect the edges of the hole and improve the seal
after installation.
a
CAUTION DANGER
When drilling holes, pay attention to avoid
electrical wires, hydraulic hoses and other
delicate components.
m
CAUTION
The drain pipe outlet must be at least 5 cm
from the floor. If it touches the ground, the unit
can block and not work properly. If the water
is discharged directly into the sewer system,
use a U- or S-shaped drain pipe to block odours
which would otherwise flow back inside.
2.4.5 Drainage pipe
The drainage pipe is used to drain the water from the
unit. Incorrect installation can cause damage to the unit
and other material damage.
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CAUTION DANGER
– Insulate all of the pipes to prevent
condensate from forming, which could
cause water damage.
– If the drainage pipe is bent or not installed
properly, the water can escape and cause
the float switch to malfunction.
– In HEAT mode, the unit discharges water.
Make sure that the drainage pipe is in a
suitable area to avoid water damage and
slipping hazards caused by the discharge
water freezing.
– DO NOT pull the drainage pipe, as this could
detach it.
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WARNING
This installation requires a polyethylene pipe
(outer diameter = 37-39 mm, inner diameter
= 32 mm). Depending on actual installation
requirements, users can buy suitably sized
pipes from their local dealer, from an after-
sales service centre or directly off the market.
1 Insert the water drain pipe into the unit’s water intake
connection pipe and use a clamping ring to securely
close the insulated water drain pipes.
2 Use the water drain pipe insulation to tie the
indoor unit’s water intake and drain pipes together
(particularly for the indoor part) and use water drain
pipe cable ties to tie them securely and ensure that
the air does not enter and condense.
3 In order to prevent water from flowing back into the air
conditioner after the operation has been completed,
the water drain pipe should be inclined outwards with
a slope (drainage part) greater than 1/100. Ensure that
the water drain pipe does not bulge or retain water.
If it does, then it will be noisy. See “Fig. 23”.
4 When connecting the water drain pipe, do not pull the
intake pipes with force so that the connections do not
come loose. At the same time, fit a support bracket

19
Installation
every 0.8~1 metres to prevent the water drain pipes
from bending. See “Fig. 23”.
5 When connecting a long water drain pipe,
the connections must be covered with insulation to
prevent them from coming loose.
6 When the water drain pipe outlet is higher than the
water intake pipe connection, try to keep the drain pipe
as vertical as possible; the outlet pipe connections will
bend so that the height of the drain pipe is 1000 mm
from the base of the drain pan. Vice versa, there will
be an excessive flow of water at the end of operation.
See “Fig. 24”. >1000mm
800 ～
1000mm
A
Fig. 23
A 1/100 slope or more
Water drain pipes from multiple units are connected to the main drain pipe that flows into the waste water pipes.
50~100mm
50~100mm
50~100mm
A B C
< 200 mm
< 600 mm
< 200 mm
< 200 mm
A Water drain pipe fittings
B Main water drain pipe
C 1/100 slope or more
Fig. 24
7 The end of the drain pipe must be more than 50 mm
off the ground or base of the drain slot. Moreover,
do not put the pipe in the water.

20
Installation
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WARNING
– When using an extension for the drainage
pipe, tighten the connection on the inside
with an additional protection pipe to stop it
from coming loose.
– The drainage pipe must slope by at least
1/100 to prevent the water from flowing back
into the air conditioner.
– To stop the pipe from bending, fix the
suspension elements every 1-1.5 m.
– If the drainage pipe outlet is higher than the
pump fitting on the unit body, use a lifting
pipe for the discharge outlet of the indoor
unit. The lifting pipe must be installed no
more than 100 cm from the false ceiling and
no further than 20 cm from the unit. Incorrect
installation can cause the water to flow back
into the unit.
– To prevent air bubbles from forming, keep
the drainage pipe horizontal or slightly
inclined upwards (<75 mm).
CHECK DRAINAGE
Before the test, ensure that the water drain flows smoothly
and check that each connection is properly sealed.
Run the water drain test in the new room before completing
the ceiling.
1 Connect the power supply and set the air conditioner
to operate in cooling mode. Check the sound of the
drainage pump in operation, and whether the water
adequately drains from the discharge water outlet.
Tray
Body
Test water outlet
Test water cap
Water drain
Water intake pipe
Water injection pipe
Fig. 25
2 Switch off the air conditioner and after 3 minutes
check for any abnormal situations. If the drainage pipe
remains exposed for any reason, too much water may
flow back and cause a warning light on the electrical
panel to flash or the water tank to overflow
3 Continue to add water until the water level exceeds the
alarm level for 3 minutes, the appliance goes into alarm
and switches off. A protection function prevents the air
conditioner from being operated for about 3 minutes
when it is restarted immediately after being switched off
4 Switch it off, remove the water and put the water control
cover back in place.
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CAUTION DANGER
– The drain cap at the base of the unit’s casing is
used to drain the water accumulated in the drain
pan should the air conditioner malfunction.
When the air conditioner is operating normally,
make sure that the drain cap is closed properly
to prevent water from leaking.