CLIMAVENETA CHD U-2T 506 Specification sheet

OPERATING AND INSTALLATION MANUAL
I - VENTILCONVETTORE CASSETTE
GB - FAN COIL CASSETTE
FR - VENTILO-CONVECTEURS CASSETTE
DE - KASSETTEN-KLIMAKONVEKTOREN
ES -
VENTILADORES CONVECTORES CASSETTE
I) Vi preghiamo di leggere con attenzione
il presente manuale prima di mettere in
funzione l’apparecchio.
GB) Please read this guide carefully before
switching on the appliance.
FR) Nous vous prions de bien vouloir lire
attentivement ce mode d'emploi avant
de mettre l'appareil en fonction.
DE) Bitte lesen Sie vor der Inbetriebnahme
des Geräts aufmerksam diese
Bedienungsanleitung.
ES) Les rogamos lean con atención el
presente manual antes de encender el
aparato.
MODELLI
MODELS
MODÈLES
MODELLE
MODELOS
CHD U-2T 506-1209
CHD U-4T 506-1209

2
GENERAL
Application page 3
General warnings 3
Basic safety rules 4
Operating limits 5
Contents of the supply 5
Receiving and handling the product 5
Project specifications 5
Unit drawings 6
Technical data 7
Drop pressure diagrams 9
INSTALLATION
Installation 11
Valve unit installation 12
Duct installation 12
Hydraulic connections 14
Condensate drain pipe 14
Auxiliary tray installation 15
Electrical connections 16
USER
Wall-mounted controls 22
RANGE
CONTENTS
For more information on technical support and spare parts, please contact:
CLIMAVENETA S.p.A.
AFTER SALES DEPARTMENT - RESIDENTIAL BUSINESS
Via Duca d’Aosta 121 - 31031 Mignagola di Carbonera (TV) ITALY
Tel: [phone] - Fax: [phone]
www.climaveneta.com - [email protected]
Operation in cooling mode: room temperature 27°C d.b./19°C w.b., chilled water at inlet 7°C and at outlet 12°C
USEFUL INFORMATION
The fan coils are appliances intended for high quality civil
use. The elegant aesthetic design, the control electronics
and the top class components facilitate its location and
guarantee optimum conditions of comfort.
CASSETTE
• Housing: made of self-extinguishing plastic
• Electric fan unit: centrifugal fans coupled directly to the 4
speed electric motor.
• Exchange coil: consisting of copper pipes with swirl design
and aluminium fins
• Air filter
WALL-MOUNTED CONTROL
Thermostat controls all function of cassette unit. Technical
characteristics of wall-mounted controls are reported in their
instruction sheet..
Pictures of the CHD unit are purely rapresentative and
could be some differences with product received.
DESCRIPTION OF THE APPLIANCE
Model Version Size Cooling capacity (kW)
CHD U-2T 506 2,92
CHD U-2T 606 4,49
CHD U-2T 706 5,33
CHD U-2T 809 5,7
CHD U-2T 1109 9,9
CHD U-2T 1209 11,1
Model Version Size Cooling capacity (kW)
CHD U-4T 506 2,69
CHD U-4T 606 3,43
CHD U-4T 706 4,01
CHD U-4T 909 6,97
CHD U-4T 1109 8,29
CHD U-4T 1209 9,3
SERVICE
Maintenance 32
Operating guide 33
Precautions 33
Troubleshooting 33
Malfunction and corrective actions 34
The following symbols are used in some parts of the booklet:
CAUTION:
for actions that require particular caution and adequate
preparation.
FORBIDDEN:
for actions that MUST NOT be carried out.
The company reserves the right to change without notice
the following documentation. It is strictly forbidden to copy or
even partial reproduce this manual.

3
APPLICATION General
CAREFULLY READ THIS MANUAL BEFORE INSTALLING
THE APPLIANCE
The Cassette fan coil are designed for use in commercial
and private environments with false ceilings. The Cassette
fan-coil units are exclusively built for air heating, filtering,
cooling and dehumidification. They are not suitable for any
other purpose.
The Cassette fan-coil unit may not be used:
• for outdoor air treatment
• for installation in moist rooms
• for installation in explosive atmospheres
• for installation in corrosive atmospheres
Make sure that the environment where the appliance is
installed does not contain substances that cause the cor-
rosion of the aluminium fins.
The appliances are supplied with hot/cold water depending
on whether the environment is being heated/cooled.
The manufacturer/seller cannot be held liable for any loss or
damage caused as a result of incorrect
installation, operation or maintenance of the cassette fan
coil units or due to any non-compliance with this
User Information Manual or any inspection, repair and main-
tenance requirement.
GENERAL WARNINGS General
After having removed the packaging, check that the con-
tents are intact and complete. In the event of non-compli-
ance, contact the Agency which sold you the appliance.
The appliances must be installed by a qualified company
in accordance with the laws and regulations in force in
the country of installation. Upon completion of work this
company should issue the owner the declaration of con-
formity of installation with current regulations and stan-
dards and with the instructions given in this booklet.
These appliances have been designed for cooling or
heating environments and should only be used for this
purpose in compatibility with their performance charac-
teristics.
Under no circumstances can the Company be held liable
under contract or in tort for damage caused to property
or injury to persons or animals due to incorrect installa-
tion, regulation and maintenance or to improper use.
Avoid the room being closed for a long time. Periodically
open the windows to ensure a correct change of air.
Should there be a water leak, put the installation on/off
switch to "off" and turn the water taps off.
Too low a temperature is harmful to health as well as
being a useless waste of energy.
Avoid direct contact with the flow of air.
During storms put the installation on/off switch to “off”.
This instruction booklet is an integral part of the appli-
ance and should therefore be carefully preserved and
ALWAYS accompany the appliance, also in the event of
transfer to another owner or user or into another installa-
tion. Should the booklet be damaged or lost, request a
copy from the Area Service Centre.
Repair or maintenance work must be carried out by the
After-Sales Service Centre or by qualified personnel in
accordance with instructions given in this booklet. Do not
alter or tamper with the appliance, since hazardous situa-
tions could be created and the manufacturer of the appli-
ance will not be liable for any damage or injury caused.
In the case of Heating installations, the temperature of
the water circulating in the fan coil must not exceed 80
°C.
Appliance must to be installed at minimum 2,5 meter
above the ground.
All personnel must have been trained or given appropriate
instructions. Personnel responsibilities must be defined
clearly. All electrical work must be carried out by or under
the supervision of qualified electrical installers. all water-
work must be carried out by qualified installers or by per-
sonnel who have been given appropriate instructions.
Assembly, disassembly, installation, electrical work, com-
missioning, repair and maintenance of the Cassette cof-
fered-ceiling fan-coil unit must be in accordance with all
applicable health and safety laws, rules and regulations,
relevant codes and standards and the latest technology.
They may include rules, regulations, codes and stan-
dards applicable to refrigeration systems, pressure ves-
sels, electrical installations and lifting tackle.
Wiring diagrams in this User Information Manual do not
address protective grounding or other electrical protec-
tion which will be required under local rules, regulations,
codes or standards or by the local electricity supplier.
All repairs or maintenance must be performed by quali-
fied specialists.
The manufacturer declines all responsibility for damage
caused by modifications or tampering with the unit.
Any modification of or addition to the fan-coil unit which
may affect safety including the incorporation and setting
of safety devices and valves requires approval by the
manufacturer.

4
BASIC SAFETY RULES General
Using electrically-operated products implies the observance
of certain basic safety rules, such as those given below:
Using electrically-operated products implies the observance
of certain basic safety rules, such as those given below:
Children and unassisted disabled persons must not use
the appliance.
Do not touch the appliance when feet are bare or parts
of the body are wet or damp.
Do not carry out any cleaning until the appliance has
been disconnected from the mains electricity supply by
putting the installation on/off switch to "off".
Do not alter the safety or regulating devices without the
permission and instructions of the manufacturer of the
appliance.
Do not pull, detach or twist the electric cables connected
to the appliance, even if disconnected from the mains
electricity supply.
It is forbidden the use of fan coil by people with physical,
sensory or mental disabilities or lack of experience. They
can use the appliance if they benefit throught the inter-
mediary of a person responsible for their security, the
necessary surveillance or specific instructions regarding
the use of fan coil.
Do not climb onto or place any objects on top of the
appliance.
Do not spray or direct water directly onto the appliance.
Do not insert sharp pointed objects through the air deliv-
ery and intake grilles.
Do not open the flaps to access internal parts of the
appliance unless the installation on/off switch is on “off”.
Do not leave the packaging material within reach of chil-
dren, but dispose of properly since it is a potential
source of danger.
INSTALLATION:
• Remove the fan lock before installation. Install a safety
switch to turn off current to the appliance in an easily
accessible position near the unit or units. Make sure the
unit is earthed.
• Do not install in explosive, corrosive or damp environ-
ments, outdoors or in very dusty rooms.
• The space above the suspended ceiling must be dry and
adequately protected against moisture and the ingress of
humidity.
• If the installation is fitted with an external air intake
damper, make sure the coil tubes are not damaged by
temperatures below freezing point.
During installation, for safety reasons, observe the fol-
lowing precautions:
• Always use work gloves.
• The unit must always be handled by two people.
• Fan-coil units should only be carried at suitable points.
When carrying fan-coil units, gloves should be worn for
safety reasons.
• Lifting tackle and gear must have sufficient capacity.
• Defective lifting gear and tackle must not be used.
• Ropes, belts and similar lifting tackle must not be knot-
ted or come into contact with sharp edges.
• Fork-lift trucks, elevating-platform trucks and cranes
must have sufficient capacity.
• Loads must not be lifted over persons.
• Do not remove the safety labels inside the appliance. If
you cannot read the labels, ask for replacements.
• Do not throw packaging material away or leave it within
reach of children as it may represent a hazard.
• Air intakes and air discharge openings must never be
obstructed or blocked.
MAINTENANCE:
• Always use original spare parts. Always use work gloves.
• Always unplug the unit from the mains power supply
before carrying out any type of operation or maintenance.
• Never remove protective elements without first unplugging
the unit from the mains power supply.
• Make sure that the fan has stopped.Flow and return
valves and any isolating valves must be closed for repair
and maintenance.
• Never tamper with or modify regulation and safety devices
without prior authorisation and instructions.
• If pipe connections of the heat exchanger are handled
improperly, hot heating fluid may be discharged and may
cause scalding.
• All panels and covers removed for repair or maintenance
work must be fitted back after the completion of work.
OPERATION:
• Do not expose to infl ammable gas. Never introduce for-
eign objects through the air intake and discharge grills.
• It is dangerous to touch the unit with damp parts of the
body and bare feet.
• Never twist, detach or pull power cables, even when the
unit is unplugged from the mains power supply.
• Never throw or spray water on the unit. Never introduce
objects or the hand into the fans.
• In particularly cold climates, if the appliance is not to be
used for long periods, drain the hydraulic circuit.
• Waste disposal: Consumables and replaced parts should
be disposed of safely and in accordance with environmen-
tal protection legislation.

5
CONTENTS OF THE SUPPLY General
The fan coil comes in a pack protected by a cardboard box
and is accompanied by:
• Installation manual
• Additional condensate tray
which are enclosed in plastic bags inside the indoor unit
pack.
• Air grille is provided in its own packaging
The operating and installation manual are considered
part of the appliance and must therefore be read careful-
ly and kept for reference.
RECEIVING AND HANDLING THE PRODUCT General
The fan coils come in single packs protected by a cardboard
box.
It is advisable to remove the packaging only when the
appliance has been located near the point of installation.
After the packaging has been removed, the fan coil must
be handled manually by suitably equipped, qualified per-
sonnel and in compliance with accidentprevention
norms.
The fan coil must be handled by equipped qualified per-
sonnel using suitable equipment for the weight of the
appliance.
Take care when removing the adhesive strips from the
appliance.
Packaging components must be disposed of correctly
and not left within reach of children since they are a
potential source of danger.
PROJECT SPECIFICATIONS General
PROJECT SPECIFICATIONS CHD U-2T
Frame in galvanised steel insulated with self-extinguishing
closed-cell polyethylene blanket of suitable thickness to limit
heat loss and noise to a minimum. Airflow grille in PS. Man-
ual louvers as well independent adjustable for vertical air-
flow direction. All the main parts can be easily accessed
through the grille. Regenerative air filters. Accident-preven-
tion grille over the fan intake.
Coil with corrugated aluminium fins and copper pipes, 100%
tested with dried air at 14 bar. 4-speed electric motor inclu-
sive of thermal switch. Low-rev radial-blade fan to maximise
acoustic comfort. Hydraulic connections. Manual air valve
with outlet connected to the condensate collecting tray.
Plastic condensate collecting tray housing the condensate
drain pump and float. Condensate drain pump with 650 mm
working head and 24 dB(A) noise level. Float for conden-
sate drain pump operation control and to warn of overflow
obstruction. Switchboard with power and control terminal
block with screw terminals.
Set-up for fresh air intake. Set-up for duct air distribution.
Set-up for cladding of air outlets. Ceiling-mounting brackets.
Hydronic cassette universal version connected with wall-
mounted thermostat.
PROJECT SPECIFICATIONS CHD U-4T
Frame in galvanised steel insulated with self-extinguishing
closed-cell polyethylene blanket of suitable thickness to limit
heat loss and noise to a minimum. Airflow grille in PS. Man-
ual louvers as well independent adjustable for vertical air-
flow direction. All the main parts can be easily accessed
through the grille. Regenerative air filters. Accident-preven-
tion grille over the fan intake.
Double coil for four pipe installation. Coils with corrugated
aluminium fins and copper pipes, 100% tested with dried air
at 14 bar. 4-speed electric motor inclusive of thermal switch.
Low-rev radial-blade fan to maximise acoustic comfort.
Hydraulic connections. Manual air valve with outlet connect-
ed to the condensate collecting tray. Plastic condensate col-
lecting tray housing the condensate drain pump and float.
Condensate drain pump with 650 mm working head and 24
dB(A) noise level. Float for condensate drain pump opera-
tion control and to warn of overflow obstruction. Switchboard
with power and control terminal block with screw terminals.
Set-up for fresh air intake. Set-up for duct air distribution.
Set-up for cladding of air outlets. Ceiling-mounting brackets.
Hydronic cassette universal version connected with wall-
mounted thermostat.
OPERATING LIMITS General
Cassette fan-coil and heat exchanger:
• Maximum temperature of heat vector fluid = 80°C
• Minimum temperature of refrigerant fluid = 5°C
• Maximum working pressure = 8 bars
• Power supply voltage: 230V - 50Hz
• Electric energy consumption: see technical data label
Valves with thermoelectric actuator:
• Refer to instruction sheet present inside kit valve-unit.
Other technical data
All other important technical data (dimensions, weights, con-
nections, noise emissions, etc.) are given elsewhere in this
User and Installation manual.

6
UNIT DRAWINGS General
CHD U-2T 506-706 CHD U-4T 506-706
CHD U-2T 809-1209 CHD U-4T 809-1209

7
TECHNICAL DATA General
Models CHD 506 CHD 606 CHD 706 CHD 809 CHD 1109 CHD 1209
Version U-2T U-2T U-2T U-2T U-2T U-2T
Air flow rate
Turbo speed m3/h 815 830 1050 1400 1700 1800
Max speed m3/h 590 600 875 1100 1300 1400
Med speed m3/h 450 460 770 920 1100 1200
Min speed m3/h 355 360 570 780 900 980
Total cooling capacity (1)
Turbo speed kW 2,92 4,49 5,33 5,7 10 11,1
Max speed kW 2,45 3,5 4,62 4,96 9,05 9,36
Med speed kW 2,08 2,84 4.17 4,45 8,16 8,24
Min speed kW 1,81 1,69 3,21 4,05 7,17 7,05
Sensible cooling capacity (1)
Turbo speed kW 2,65 3,75 4,56 4,64 8,54 7,87
Max speed kW 2,15 2,9 3,94 3,96 7,47 6,48
Med speed kW 1,86 2,33 3,54 3,5 6,68 5,59
Min speed kW 1,36 1,55 2,74 3,12 5,83 4,69
Max water flow (1) l/h 772 914 977 1905
Max pressure drop (1) kPa 6 11,8 15,1 28 49 48
Heating capacity (2)
Turbo speed kW 4,04 5,98 7,12 6,95 13 12,19
Max speed kW 3,38 4,59 6,15 5,86 11,8 9,95
Med speed kW 2,83 3,67 5,56 5,14 10,3 8,79
Min speed kW 2,43 2,85 4,33 4,54 9,08 7,4
Max water flow (2) l/h 772 914 977 1905
Max pressure drop (2) kPa 5 9,6 12,5 23 43 42
Heating capacity (3)
Turbo speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Max speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Med speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Min speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Max water flow (3) l/h n.n. n.n. n.n. n.n. n.n. n.n.
Max pressure drop (3) kPa n.n. n.n. n.n. n.n. n.n. n.n.
Sound power level (4)
Turbo speed dB(A) 57 58 64 61 65 67
Max speed dB(A) 50 52 59 55 61 62
Med speed dB(A) 43 45 57 51 56 57
Min speed dB(A) 38 41 51 48 52 51
Technical characteritics
Water content l 1,04 1,04 1,04 1,65 1,65 2,9
Water inlet fittings inch 3/4 3/4 3/4 1 1 1
Water outlet fittings inch 3/4 3/4 3/4 1 1 1
Max adsorbed power W 106 106 155 149 149 211
Max adsorded current A 0,5 0,5 0,7 0,67 0,67 0,93
Electrical power supply V-Ph~Hz 220-240/1/50 220-240/1/50 220-240/1/50 220-240/1/50 220-240/1/50 220-24/1/50
Indoor unit dimension
High mm 310 310 310 314 314 314
Width mm 570 570 570 843 843 843
Depth mm 570 570 570 843 843 843
Packaging (H×WxD) mm 391x686x721 391x686x721 391x686x721 391x911x911 391x911x911 391x911x911
Net Weight kg 22 22 22 26,5 26,5 30
Gross Weight kg 25 25 25 31 31 34,5
Front panel dimension
High mm 40 40 40 55 55 55
Width mm 720 720 720 950 950 950
Depth mm 720 720 720 950 950 950
Packaging (H×WxD) mm 126x791x791 126x791x791 126x791x791 156x1026x1031 156x1026x1031 156x1026x1031
Net Weight kg 2,5 2,5 2,5 4,0 4,0 4,0
Gross Weight kg 4,5 4,5 4,5 7 7 7
Data reffered to
(1) Operation in cooling mode: room temperature 27°C d.b./19°C w.b., chilled water at inlet 7°C and at outlet 12°C
(2) Operation in heating mode: room temperature 20°C d.b., hot water at inlet 50°C, with identical flow rate that in the cooling mode
(3) Operation in heating mode: room temperature 20°C d.b., hot water at inlet 70°C and at outlet 60°C
(4) Sound power on the basis of measurements made in compliance with Eurovent 8/2
n.n. Not necessary

8
TECHNICAL DATA General
Data reffered to
(1) Operation in cooling mode: room temperature 27°C d.b./19°C w.b., chilled water at inlet 7°C and at outlet 12°C
(2) Operation in heating mode: room temperature 20°C d.b., hot water at inlet 50°C, with identical flow rate that in the cooling mode
(3) Operation in heating mode: room temperature 20°C d.b., hot water at inlet 70°C and at outlet 60°C
(4) Sound power on the basis of measurements made in compliance with Eurovent 8/2
n.n. Not necessary
Models CHD 506 CHD 606 CHD 706 CHD 909 CHD 1109 CHD 1209
Versione U-4T U-4T U-4T U-4T U-4T U-4T
Air flow rate
Turbo speed m3/h 815 830 1050 1500 1700 1800
Max speed m3/h 590 600 875 1150 1300 1400
Med speed m3/h 450 460 770 970 1100 1200
Min speed m3/h 355 360 570 830 900 980
Total cooling capacity (1)
Turbo speed kW 2,69 3,43 4,01 6.97 8,29 9,3
Max speed kW 2,11 2,75 3,53 6,29 7,43 8,19
Med speed kW 1,4 2,31 3,3 5,69 6,41 7,05
Min speed kW 1,24 1,93 2,71 5,22 5.65 6,02
Sensible cooling capacity (1)
Turbo speed kW 2,29 3,1 3,59 5,33 6,41 7,01
Max speed kW 1,8 2,46 3,15 4,8 5,69 6,09
Med speed kW 1,29 2,21 2,91 4,35 4.83 5,16
Min speed kW 1,11 1,7 2,37 3,98 4,18 4,35
Max water flow (1) l/h 461 688 1196 1420 1596
Max pressure drop (1) kPa 8,5 12 15,5 32 40 50
Heating capacity (2)
Turbo speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Max speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Med speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Min speed kW n.n. n.n. n.n. n.n. n.n. n.n.
Max water flow (2) l/h n.n. n.n. n.n. n.n. n.n. n.n.
Max pressure drop (2) kPa n.n. n.n. n.n. n.n. n.n. n.n.
Heating capacity (3)
Turbo speed kW 3,69 4,62 5,31 6,52 7,43 8,39
Max speed kW 2,93 3,86 4,65 5,35 6,09 6,91
Med speed kW 2,4 3,33 4,23 4,68 5,36 6,13
Min speed kW 2,01 2,96 3,38 4,15 4,59 5,23
Max water flow (3) l/h 324 465 590 670 740
Max pressure drop (3) kPa 12,9 25 21,1 20 25 30
Sound power level (4)
Turbo speed dB(A) 57 58 62 62 66 67
Max speed dB(A) 49 50 58 56 62 62
Med speed dB(A) 43 44 56 52 56 57
Min speed dB(A) 39 41 50 49 50 51
Technical characteritics
Water content l 1,04 1,04 1,04 2,9 2,9 2,9
Water inlet fittings inch 3/4 , 1/2 3/4 , 1/2 3/4 , 1/2 1 , 3/4 1 , 3/4 1 , 3/4
Water outlet fittings inch 3/4 , 1/2 3/4 , 1/2 3/4 , 1/2 1 , 3/4 1 , 3/4 1 , 3/4
Max adsorbed power W 103 103 155 153 209 211
Max adsorded current A 0,4 0,4 0,7 0,69 0,92 0,93
Electrical power supply V-Ph~Hz 220-240/1/50 220-240/1/50 220-240/1/50 220-240/1/50 220-240/1/50 220-240/1/50
Indoor unit dimension
High mm 310 310 310 314 314 314
Width mm 570 570 570 843 843 843
Depth mm 570 570 570 843 843 843
Packaging (H×WxD) mm 391x686x721 391x686x721 391x686x721 391x911x911 391x911x911 391x911x911
Net Weight kg 22 22 22 29,5 29,5 30
Gross Weight kg 25 25 25 34 34 34,5
Front panel dimension
High mm 40 40 40 55 55 55
Width mm 720 720 720 950 950 950
Depth mm 720 720 720 950 950 950
Packaging (H×WxD) mm 126x791x791 126x791x791 126x791x791 156x1026x1031 156x1026x1031 156x1026x1031
Net Weight kg 2,5 2,5 2,5 4,0 4,0 4,0
Gross Weight kg 4,5 4,5 4,5 7 7 7

9
DROP PRESSURE AND CORRECTION FACTOR General
Unit pressure drop (2-Pipe)
(without valve assembly)
Unit pressure drop (4-Pipe)
(without valve assembly)
CHD 506 - 706 MODELS (U-2T E U-4T VERSION)
Model Capacity Fan speed
Turbo Max Med Min
CHD U-2T 506 Total 1 0,759 0,483 0,430
Sensible 1 0,761 0,530 0,456
CHD U-2T 606 Total 1 0,779 0,632 0,377
Sensible 1 0,773 0,623 0,414
CHD U-2T 706 Total 1 0,868 0,782 0,603
Sensible 1 0,865 0,778 0,600
CHD U-4T 506 Total 1 0,785 0,523 0,463
Sensible 1 0,785 0,564 0,487
CHD U-4T 606 Total 1 0,821 0,668 0,419
Sensible 1 0,810 0,658 0,451
CHD U-4T 706 Total 1 0,882 0,822 0,676
Sensible 1 0,878 0,812 0,661
CHD U-2T 506 - 706
CHD U-4T 506 -706 (HEATING CIRCUIT)
CHD U-4T 506 -706 (COOLING CIRCUIT)

10
DROP PRESSURE AND CORRECTION FACTOR General
Unit pressure drop (2-Pipe)
(without valve assembly)
Unit pressure drop (4-Pipe)
(without valve assembly)
CHD 809 - 1209 MODELS (U-2T E U-4T VERSION)
CHD 809
CHD 809
CHD 909 - 1209
CHD 909 - 1209
CHD 809
CHD 909 - 1209
CHD 909 - 1209
CHD 809
Model Capacity Fan speed
Turbo Max Med Min
CHD U-2T 809 Total 1 0,870 0,782 0,711
Sensible 1 0,853 0,755 0,673
CHD U-2T 1109 Total 1 0,854 0,750 0,652
Sensible 1 0,835 0,720 0,614
CHD U-2T 1209 Total 1 0,843 0,742 0,635
Sensible 1 0,823 0,710 0,596
CHD U-4T 909 Total 1 0,903 0,817 0,749
Sensible 1 0,902 0,817 0,747
CHD U-4T 1109 Total 1 0,897 0,774 0,682
Sensible 1 0,888 0,754 0,653
CHD U-4T 1209 Total 1 0,881 0,758 0,647
Sensible 1 0,869 0,737 0,621

11
250 cm
INDOOR UNIT INSTALLATION Installation
WHERE TO INSTALL INDOOR UNIT
There should not be any heat source or steam near the
unit. Where there is no obstacle in the air passages in
and out of the unit.
Cassette has to be installed in:
• A place where air circulation in the room will be good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into considera-
tion.
• Where it is wide enough to leave sufficient space around
the unit for service works.
• Consider using an area where installation is easy.
INDOOR UNIT INSTALLATION
• Select the location where a space between the air dis-
charge outlets and the wall or any air obstruction objects is
more than 100 cm. as shown in the drawing on the right.
Also ensure that the position does not interfere with light
fittings, sprinkle heads, etc.
• Determine the ceiling hole by using the paper pattern.
• Mark the position of the hangers on ceiling by using posi-
tion (A, B, C) and (D) in the paper pattern.
• Depending on the type of ceiling the hangers can be fixed
as shown in the drawing.
• Once the threaded hangers have been positioned, do not
tighten the nuts, and insert the washers as shown in the
drawing.
Carefully lift the unit (without the frame) using the four
suspension brackets (or the four corners), inserting it
into the false ceiling.
• Align and level the unit by adjusting the nuts and locknuts
on the threaded hangers, maintaining a distance of 25-30
mm. between the sheet metal body and the underside of
the false ceiling.
• In rooms with high humidity, brackets should be insulated
by self adhesive insulation.
• Installation of grille/frame assembly
• Use the screws supplied to fix the frame in position.
Louvers of cassette air grille could be managed manually by the installer. They could not be controlled by wall mounted ther-
mostat or connected to power supply.

12
• For the installation of the valves, follow the instruction of
the producer; to make the connection to the Cassette,
please make reference to the unit drawings.
• In cold water installation, to avoid that the condensate
drops on the ceiling, it is necessary to insulate the piping,
the valves, and the coil’s connections.
Valves electric wiring diagrams
• For valves electric connection refer to wiring diagram relat-
ed to selected control.
The cables must pass through the apposite fairleads and
flexible couplings.
The valves must be connected according to the suggest-
ed electric wiring diagrams.
The valves used must stop the entering of the water
when there is no electrical feeding.
If the proposed connections are not respected, there will
be the risk that the water overflows from the condensate
collection tray.
It is important that the valves open only when the fan is
working at one of the three speeds.
Check the seal in the most critical points of the plant
when it is filled of liquid for the first time.
The manufacturer cannot be consider responsible in
case of bad working or damages due to the drop of
valves sets purchased directly by the installer from other
suppliers.
INSTALLATION OF VALVE UNIT Installation
Primary air flow connection
CHD – hydronic cassette units (2 pipe as 4 pipe version)
have primary air flow connection. They are equipped with
inlets for treated air on the corner of the unit. This air is
mixed with the untreated room air inside the appliance.
The pressure at the treated air inlets is slightly below
atmospheric pressure. The low pressure should be dis-
regarded in the design of the treated air system.
• To connect cassette unit with primary air flow connection is
necessary a circular adapter (not provided) to be applied
to the primary air inlet for connecting the appliance air
pipes.
• The flow of treated air is limited to 20% of the total air flow
of the fan convector at medium speed, with a maximum of
100 m3/h for each opening.
• The fan convector must not interfere with the lighting sys-
tem in the false ceiling.
• The fresh air should be treated, filtered and must not be
too cool.
Air multiple connection
Air outlets are provided on the fan coil unit for connection to
separate supply air ducting. Air flow and pressure at each
air outlets are, however, a function of the number of air out-
lets used.
The size and the location of the outlets is shown by the
drawings.
All air ducting departing from the fan-coil unit must fea-
ture thermal insulation to avoid condensation and drip-
ping water.
After duct insulation, complete the water and electrical
connections.
DUCT INSTALLATION Installation

13
WATER CONNECTIONS Installation
Typical water piping diagram
CHD 506-706
2 Pipe
4 Pipe
CHD 809-1209
2 Pipe
4 Pipe
Field supply
Water in Shut off valve Water out
Water out Shut off valve Water in
Fan coil
unit
3-way motorized valve

14
• When a piping is connected to the unit main body or
removed from it, be sure to use two wrenches to fasten it.
(See the figure)
Carefully insulate pipes, valve assemblies and coil con-
nections to avoid condensation forming on the pipes and
dripping on the false ceiling.
• Provide the drain piping as short as possible with down-
ward inclination and no air trap.
• To ensure correct condensate water flow, the drain pipe
should have a gradient of 2% without obstructions.
Furthermore an odour trap of at least 50 mm. depth should
be made to prevent unpleasant odours from reaching the
room.
• Condensate may be discharged at a maximum height of
200 mm. above the unit.
The condensate pipe must be insulated.
• If more than one unit is installed in the room, the drain sys-
tem can be made as shown.
• The control panel can be reached by opening the grille
and removing the metal covers.
• Connect the power cables to terminal box connectors in
accordance with the wiring diagram and tighten firmly.
• Wiring diagrams have to be made by skilled installer.
Install the water probe (provided in wall-control kit) in
correspondence of delivery hydraulic pipe. Water probe
has to detect exact water temperature of the hydraulic
circuit. Install properly water probe with conductive
paste.
In case of valve unit installation, place water probe on
valve unit's pocket.
In case of 4-pipes installation, place water probe in cor-
respondence of heat coil (or heat valve unit's pocket).
WATER CONNECTIONS Installation

15
1. REMOVE THE PLASTIC CAP
2. INSTALLATION AUXILIARY DRAIN PAN
SCREW M4x20MM
SCREW M4x20MM
SCREW M4x20MM
INSULATION
WATER CONNECTIONS Installation
Auxiliary tray installation CHD 506-706 (U-2T e U-4T)
1. REMOVE THE PLASTIC CAP
2. INSTALLATION AUXILIARY DRAIN PAN
SCREW 3 M4x20MM
Auxiliary tray installation CHD 809-1209 (U-2T e U-4T)

16
ELECTRICAL CONNECTION Installation
Connection instruction
Perform electrical connections in accordance with laws
and regulations in force in the country concerned.
Always disconnect the electrical power supply before
opening the unit.
• Before installing fan coil make sure the rated voltage of
the power supply is 230V - 50 Hz.
• Make sure that, in addition to supplying the working cur-
rent required by the fan coil, the mains electrical supply is
also able to supply the current necessary to operate other
household appliances present.
• Maximum current absorbed by hydronic cassette is report-
ed in TECHNICAL DATA TABLE.
Cassette connection
Cassette terminal board is configured for power, wall-mount-
ed control and valve connections, according to wiring dia-
grams reported in the installation manual.
The unit must always be earthed.
• Upstream of the unit, fit an Omni polar switch with mini-
mum contact distance of 3 mm.
• The minimum cross section of the electric wires is 0.75
mm2. Each terminal accommodates two wires of the same
cross-section (maximum 1.5 mm2).
Electrical characteristic
• The motor is protected by a thermal contact integrated in
the winding. It stops the motor if overheating occurs and
starts the motor again automatically after it has cooled
down.
• The fan coil is provided with a terminal board for the con-
nection of the electrical feeding, for the fan speed control
and for the connection with the safety device
• The installer has to provide input connection through
access provided on the sides of the unit, fixing the wires
and taking care not to pinch them.
Multiple connection
To connect, respect the wiring diagrams in this booklet. Only
one fan coil can be connected to the control unit. To control
more than one fan coil with a single control unit, each appli-
ance must be fitted Kit SPB for multiple connection. Refer to
multiple connection wiring diagram and to the following table
Drain pump
On cooling mode, the electronic board installed on the unit,
controls and runs the condensate drain pump. A level con-
trol system inside the unit starts the drain pump. In case the
internal condensate level reaches the safety limit, the supply
of the water to the valve is stopped. The safety relay has a
deviation contact and allows a remote alarm signal.
Unit Size NS-NSW (1) PS-PSW (1) MT-MTW (1) AT-ATW (1) SPB (2) SPB (3) Absorbtion*
CHD 50655521560,4
60644411550,5
70633311540,7
80933311540,67
90933311540,69
110922211530,92
1209 22211530,93
Note
(1) Maximum number of unit of the same model and size, connectable to a single control
(2) Maximum number of units of different size or model connectable to a single control with SPB kit installation for each unit
(3) Maximum number of units of the same size and model connectable to a single control with a single SPB kit
* Electric absorption of a single unit (A)
Mutiple connection for hydronic cassette CHD

17
ELECTRICAL CONNECTION Installation
CHD 506 - 706
CHD 809 - 1209

18
ELECTRICAL CONNECTION Installation
Single electrical connections: cassette unit with wall-mounted control
For electrical connections of CHD cassette fan-coil refer to following electrical diagrams. Do not refer to wiring dia-
grams present on instruction sheet of wall-mounted controls.
CHD 506÷706 + NSW
CHD 809÷1209 + NSW

19
ELECTRICAL CONNECTION Installation
Single electrical connections: cassette unit with wall-mounted control
For electrical connections of CHD cassette fan-coil refer to following electrical diagrams. Do not refer to wiring dia-
grams present on instruction sheet of wall-mounted controls.
CHD 506÷706 + ATW-MTW-PSW
CHD 809÷1209 + ATW-MTW-PSW

20
CHD 506÷706 + SPB + NSW
ELECTRICAL CONNECTION Installation
Multiple connection cassette fan-coil with wall-mounted controls
For electrical connections of CHD cassette fan-coil refer to following electrical diagrams. Do not refer to wiring dia-
grams present on instruction sheet of wall-mounted controls.