CLIVET MV6-Xmi 252T-2700T Series Reference manual

OUTDOOR UNIT
VRF
MV6-XMi 252T-2700T Series
MANUAL
FOR INSTALLATION,
USE AND MAINTENANCE
M0VS40P17-02 -09-20

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
MV6 unit from 252T to 2700T
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 device; 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 Preliminary indications ................................. 10
2.1 Combinations of outdoor/indoor units 10
2.2 Unit dimensions 12
2.3 Master and slave units 12
2.4 Operating range 13
2.5 Dimensions of the connection pipe 13
2.6 Length of refrigeration piping 14
3 Installation...................................................... 15
3.1 Preliminary warnings 15
3.2 Receiving the product 15
3.3 Handling 15
3.4 Dimensions of the installation area 17
3.5 Specifications for fixing 18
3.6 Ducting of outdoor unit 19
3.6.1 Transverse ducting 21
3.6.2 Longitudinal ducting 21
3.7 Disassembly of panels 22
4 Refrigerant piping.......................................... 23
4.1 Installation of the refrigerant piping 23
4.1.1 Sizing of the refrigerant piping 26
4.2 Thermal insulation of the pipes 33
5 Electrical connections................................... 35
5.1 Preliminary information 35
5.2 Power supply line 38
5.3 Communication bus network 40
6 Starting up the system.................................. 43
6.1 Flushing the pipes. 43
6.2 Gas leak test 43
6.3 Vacuum operation 44
6.4 Charging with refrigerant 45
7 Special functions ........................................... 47
7.1 Configuration of the dip-switches 47
7.1.1 Controller type 47
7.1.2 Static pressure 47
7.1.3 Silent mode 48
7.1.4 Outdoor unit address 48
7.1.5 Outdoor unit capacity 49
7.1.6 Priority mode 49
7.1.7 Addressing mode 50
7.1.8 Number of indoor unit 50
7.1.9 Network address 50
7.2 Digital display 51
7.2.1 Menu mode 52
7.2.2 System control mode 53
7.2.3 Output digital display 54
7.2.4 Error codes 54
8 Start-up ........................................................... 55
8.1 Start-up preparations 55
8.2 Commissioning 55
8.3 VRF system addressing procedure in
AUTOMATIC mode 56
9 Maintenance................................................... 57
10 Disposal .......................................................... 58

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 unit to ensure its safe operation.
– Periodically check the integrity of the power supply 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 unit 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.
– Perform the installation taking into account any possible natural events such as strong winds, typhoons and
earthquakes. The appliance could fall and be damaged as well as cause damage to property or physical injury.
– If installing in areas prone to thunderstorms, take measures to protect the appliance from lightning.
– 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.
– The direction of the flow of liquid is indicated with words or symbols on the housing of the appliance.
– 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.

5
General Details
– 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 outlet. 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.
– Install the appliance in such a way that the noise and heat is generates does not disturb people living in the
vicinity and does not affect the growth of animals or plants.
– Read this manual carefully before using the unit 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 device.
– 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 device 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 equipment. 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
2
5
1
1
1
4
3
Fig. 1
1 Air inlets
2 Door for connection of the refrigeration lines and wiring
3 Fixed foot for securing to the ground
4 Air outlet
5 Holes for handling with a fork lift truck
l
WARNING
The images in this manual are provided for illustrative purposes only. The appearance of your device 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
Flat blade screwdriver 1
Elbow at 90° 1
Sealed cap 8
Connecting pipe 2
Suitable resistance 2
Key 1
Bag of screws (accessory) 1
Installation manual 1
1.4 Identification
The outdoor unit can be identified by the serial number label (1) that shows the technical and performance data of the
unit and what is required by the legislation in force.
1
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
Preliminary indications
2 PRELIMINARYINDICATIONS
2.1 Combinations of outdoor/indoor units
The table on the next page indicates:
– the maximum power obtainable by installing
several outdoor units in series (Total power);
– the maximum quantity of indoor units that can be
installed in relation to the power of the outdoor
units installed (Max indoor units);
– the combination of the various models to be used
to reach the desired total power (Single unit power).
l
WARNING
When all the outdoor units in the system are
running at the same time, the total power of the
indoor units must be less than or equal to the
total power of the outdoor units. Otherwise the
cooling/heating effect would be compromised.
When all the indoor units of the system are not
running at the same time, the maximum total
power of the indoor units can reach 130% of
the total power of the outdoor units.
If the system is used in an environment where
there is an extreme climate (outdoor air
temperature too high or below -10°C), the total
power of the indoor units must be less than
the total power of the outdoor units.
For example, the total power of 96Hp will be obtained
by combining in series three 900T outdoor units of 32Hp
each. With this configuration it will be possible to manage
up to a maximum of 64 indoor units.
For complete information on the maximum power of
the indoor units and therefore their number, refer to the
TECHNICAL BULLETIN.
Balancing of operating times
In multi-module systems, the operating logic of the
compressors allows correct rotation and distribution of
operating hours. The use of each component is optimised
and the operational life of the entire system is extended.
The system cyclically alternates the workload of the units
installed in series.
Example of balancing with cyclical alternation of units:
Cycle 1
The first unit works at full capacity, the second works at
medium capacity and the third remains idle.
100%
1
50% 10%
Fig. 3
Cycle 2
The first unit remains idle, the second works at full
capacity and the third works at medium capacity.
100% 50%10%
2
Fig. 4
Cycle 3
The first unit works at medium capacity, the second
remains idle and the third works at full capacity.
100%50% 10%
3
Fig. 5

11
Preliminary indications
Total
power
(Hp)
Single unit power (Hp) Max
indoor
units
252T
8Hp
280T
10Hp
335T
12Hp
400T
14Hp
450T
16Hp
500T
18Hp
560T
20Hp
615T
22Hp
670T
24Hp
730T
26Hp
785T
28Hp
850T
30Hp
900T
32Hp
8°°13
10 °°16
12 °°20
14 °°23
16 °°26
18 °°29
20 °°33
22 °°36
24 °°39
26 °°43
28 °°46
30 °°50
32 °°53
34 °°°°56
36 °°°°59
38 °°°°63
40 °°°°64
42 °°°°64
44 ° °° ° 64
46 °°°°64
48 °°°°64
50 °°°°64
52 ° °° ° 64
54 °°°°64
56 ° °° ° 64
58 °°°°64
60 °°°°64
62 °°°°64
64 ° °° ° 64
66 °°°°°°64
68 °°°°°°64
70 °°°°°°64
72 °°°°°°64
74 °°°°°°64
76 ° °° ° °°64
78 °°°°°°64
80 °°°°°°64
82 °°°°°°64
84 ° °° ° °°64
86 °°°°°°64
88 ° °° ° °°64
90 °°°°°°64
92 °°° °° ° 64
94 °°° °° ° 64
96 ° ° °° ° ° 64

12
Preliminary indications
2.2 Unit dimensions
252T - 280T - 335T
1635 mm790 mm
990 mm 227 kg
Fig. 6
400T - 450T
1635 mm
850 mm
1340 mm
277 kg
Fig. 7
500T - 560T - 615T
1635 mm
825 mm
1340 mm
348 kg
Fig. 8
670T - 730T - 785T - 850T - 900T
1830 mm
850 mm
1730 mm 430 kg
(670/730/785)
475 kg
(850/900)
Fig. 9
2.3 Master and slave units
In systems with several outdoor units, these must be
placed in descending order, from the unit with the highest
power to the unit with the lowest power.
The unit with the highest power must be placed in the
first branch and must be set as the master unit, while the
others must be set as the slave units.
335T 615T 900T 123
4
567
Fig. 10
1 Master outdoor unit (e.g. size 900T)
2 Slave outdoor unit (e.g. size 615T)
3 Slave outdoor unit (e.g. size 335T)
4 First outdoor branch joint
5 First indoor unit
6 Second indoor unit
7 Third indoor unit

13
Preliminary indications
Model identification
Model kW Power supply
252T 25.2 400V + N Three-phase
280T 28 400V + N Three-phase
335T 33.5 400V + N Three-phase
400T 40 400V + N Three-phase
450T 45 400V + N Three-phase
500T 50 400V + N Three-phase
560T 56 400V + N Three-phase
615T 61.5 400V + N Three-phase
670T 67 400V + N Three-phase
730T 73 400V + N Three-phase
785T 78.5 400V + N Three-phase
850T 85 400V + N Three-phase
900T 90 400V + N Three-phase
2.4 Operating range
The system is designed to function properly under the
following climatic conditions
Mode Outdoor
temp. °C
Indoor
temp. °C
Relative indoor
ambient
humidity
Cooling -15 to +48 17 to 32 < 80%
Heating -25 to +24 15 to 30 /
If the system is operated outside of the ranges indicated,
the protection function is activated and the unit stops.
2.5 Dimensions of the connection pipe
252T - 280T - 335T (1)
400T - 450T - 600T - 560T - 615T (2)
670T - 730T - 785T - 850T - 900T (3)
A
C
B
21 3
Fig. 11
(A) Service valve. (Used to measure system pressure,
to charge refrigerant and to create suction)
(B) Connection of the liquid pipe
(C) Connection of the gas pipe
Ø
(mm)
Model
252T
280T 335T 400T 450T
500T
560T
615T
670T
730T
785T
850T
900T
B 12.7 15.9 15.9 19.1 22.2 22.2
C 25.4 28.6 31.8 31.8 31.8 38.1

14
Preliminary indications
2.6 Length of refrigeration piping
In order to function correctly the system must take into
account:
– the total length of the pipes (1);
– the maximum difference in height between the
outdoor and indoor units (2) (3);
– the maximum lengths after the first Y-joint (4);
– the maximum difference in height between the
indoor units (5).
2
5
1
4
Installation with outdoor units at the top
Fig. 12
3
5
1
4
Installation with outdoor units at the bottom
Fig. 13
Ref. Pipe length Value
1Total length of pipes 1000m
2
Maximum difference in height
between outdoor units
(located at the top) and indoor units
90m
3
Maximum difference in height
between outdoor units (located at
the bottom) and indoor units
110m
4Maximum length after first Y-joint. 40/90m (*)
5Maximum difference in height
between indoor units 30m
(*) The maximum length of the standard pipe is 40m, but
it is possible to reach up to 90m (see “4.1 Installation
of the refrigerant piping” page 23 ).

15
Installation
3 INSTALLATION
3.1 Preliminary warnings
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 “3.4 Dimensions of the installation area” page 17
Put the appliance in place.
See “3.5 Specifications for fixing” page 18
Lay the refrigerant piping.
See “4 Refrigerant piping” page 23
Perform correct installation of the condensate
drain piping.
Clean the refrigerant piping.
See “6.1 Flushing the pipes.” page 43
Make the refrigerating connections.
See “4.1 Installation of the refrigerant piping” page 23
Test the tightness of the system at the pressures
indicated by the manufacturer.
See “6.2 Gas leak test” page 43
Carry out the correct pressurisation of the
system.
See “6.3 Vacuum operation” page 44
Carry out the electrical wiring, configurations and
addressing according to the diagrams provided.
See “5 Electrical connections” page 35
3.2 Receiving the product
The appliance is supplied packed. 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.
Check that the model, specifications and quantity
delivered conform to the order placed.
In case of damage to the equipment 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 device and keep it with care for future
reference or transfer to another Owner or User.
3.3 Handling
Transport, lifting and handling must be carried out with
all due care. Improper use and failure to comply with the
instructions will void the warranty.
The areas set aside for handling and installing the
appliance must be identified and inspected in advance in
order to detect the presence of possible dangers.
The general rules for lifting and handling the appliance
are given below.
– Make sure that the safe working load of the
lifting equipment is greater than the mass of the
equipment to be lifted
– Take all necessary measures to ensure maximum
stability of the load.
– Handling must be performed smoothly, without
jerking or sudden movements.
The appliance must be taken as close as possible to the
place set aside for installation
If a forklift is used, make sure to insert the forks so that the
load is balanced between them
The packaging that covers the appliance and any straps
or clamps securing parts of it must only be removed after
handling at the site of use.
Before positioning the appliance, consider its overall
dimensions and the space necessary for the operator's
manoeuvres.

16
Installation
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.
Fig. 14
Fig. 15
l
WARNING
During all handling operations, use the
appropriate PPE such as hard hat, gloves and
safety shoes.
l
WARNING
Before use, remove the six pieces of PE
foam in the back of the unit that protect the
condenser. Be careful not to damage the fins
or the efficiency of heat exchange could be
compromised.
d
It is PROHIBITED to install the outdoor
unit in the following places:
– near an obstacle blocking the air inlets and
outlets;
– near a public road, crowded areas or places
where the noise from the unit may cause
disturbance to others;
– near animals or plants that may be disturbed
by the hot air coming out;
– near combustible gas sources;
– in very dusty places;
– in places excessively exposed to salty air.

17
Installation
3.4 Dimensions of the installation area
The appliance must be installed in such a way that a
sufficient amount of air can flow through the unit itself.
If there is a side wall adjacent to the appliance, the latter
must be at least 800mm higher than the side wall.
800 mm
Fig. 16
The distance between the appliance and the side walls
must be at least 1m.
If several appliances are installed in a line, the following
distances must be observed:
1 m1 m
1 m
X
Fig. 17
Model Distance (X)
252T to 900T from 100 mm to 500 mm
In the case of several rows of appliances, there must be
a distance of at least 1m between each row.
1 m1 m
Fig. 18

18
Installation
In the case of forced installation less than one metre
from a higher wall of the appliance, it is recommended to
make a duct for the correct discharge of air. The vertical
section of the duct must extend higher than the wall. If the
static pressure is higher than 20Pa, the ducting must be
adapted according to this pressure. For more information
see paragraph “3.6 Ducting of outdoor unit” page 19
>0mm
Fig. 19
If there is a structure above the appliance at a distance of
less than 800mm, ducting must be installed.
> 800 mm
Fig. 20
3.5 Specifications for fixing
For correct installation of the unit on the base, the latter must:
– Be placed on solid ground or structures capable of
supporting its weight (1);
– be made of concrete or steel;
– have a minimum height of 200mm and a minimum
thickness of 80mm (2). These dimensions allow for
sufficient access during installation of the piping;
– have rounded edges;
– be perfectly level. The support points must ensure
uniform distribution of the weight.
For fixing, use 10mm diameter expansion plugs (3) and
anti-vibration rubber pads (4).
In case of installation of several units in line, these must
be on the same plane and at the same level.
1
2
3
4
Fig. 21
m
CAUTION
When drilling holes. It is recommended to
always use eye protection.
– Mark the positions of the four expansion anchors
according to the measurements shown in the
following table.
– Drill the holes for the expansion anchors.
– Remove any dust in the holes.
– Insert a nut on the end of each expansion anchor.
– Hammer the expansion anchors into the holes
made.
– Remove the nuts from the expansion anchors and
place the outdoor unit on the anchors.
– Insert the rubber pads on each expansion anchor
and reapply the nuts.
– Using a spanner, tighten the nuts firmly.

19
Installation
– The location of the fixing holes in the appliance is
indicated in the table below
Ref.
Model
252T
280T
335T
400T
450T
500T
560T
615T
670T
730T
785T
850T
900T
A 990mm 1340mm 1730mm
B 740mm 1090mm 1480mm
C 790mm 825mm 850mm
D 723mm 723mm 723mm
A C
D
B
Fig. 22
(A) Width of appliance
(B) Location of holes on long side
(C) Depth of appliance
(D) Location of holes on short side
3.6 Ducting of outdoor unit
If it is necessary to duct the outdoor unit, the following
instructions must be observed:
– Remove the fan protection grille (1), otherwise the
flow of air will be negatively conditioned;
– lay the ducting in such a way that it has only one
curve (2);
– add insulation (3) between the appliance and the
ducting to avoid vibrations;
– prepare separate ducting for each unit (4). It is not
possible to share ducting among several units;
– The ventilation fins of the air outlet should be
installed at an angle of 15° or less on the horizontal
plane (5) to minimise the impact on the air flow.
The distance between two fins must be 100mm (6).
The fins must have a length of 90mm (7).
1
4
2
3
5
≤15°
6
7
Fig. 23
Depending on requirements, two different types of
ducting can be laid: transverse or longitudinal

20
Installation
Static pressure Note
0 Pa Factory conditions (without ducting)
0 - 20 Pa Remove the grille and connect to
the duct
20 - 40 Pa
Remove the grille and configure
at the dip switches (see “7.1.2 Static
pressure” page 47 )
Table 1
The following graphs show the performance of fans with
a ducted unit. The static pressure (Pa) on the ordinate
axis, the air flow rate (m3/h) on the abscissa axis. Curve (1)
indicates the average (custom) E.S.P. value, curve (2)
indicates the low E.S.P. value (factory setting)
252T - 280T - 335T
0
20
40
60
9.800 10.000 10.200 10.400 10.600 10.800 11.000 11.200
1
2
Fig. 24
400T - 450T
0
20
40
60
12.000 12.200 12.400 12.600 12.800 13.000 13.200
1
2
Fig. 25
500T - 560T - 615T
0
20
40
60
15.800 16.000 16.200 16.400 16.600 16.800 17.000 17.200
1
2
Fig. 26
670T - 730T - 785T
0
20
40
60
23.600 23.800 24.000 24.200 24.400 24.600 24.800 25.000 25.200
1
2
Fig. 27
850T - 900T
0
20
40
60
22.600 22.800 23.000 23.200 23.400 23.600 23.800 24.000 242.00
1
2
Fig. 28