System air VH07 Manual

High Static Pressure Ductable Fan Coil Unit
Installation and maintenance manual
800 â4650m3/h
4.1 â22.6kW
5.3 â26.9kW
07 / 27
VH

INSTALLATION INSTRUCTION
NOTICE D’INSTALLATION
INSTALLATIONSHANDBUCH
ISTRUZIONI INSTALLAZIONE
INSTRUCCIONES DE INSTALACIÓN
English
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English
2VH
CONTENTS
1. GENERAL RECOMMENDATIONS........................................................................................................................................................ 3
1.1. SAFETY DIRECTIONS .......................................................................................................................................................................................................................3
1.2. WARNING.........................................................................................................................................................................................................................................3
2. INSPECTION AND STORAGE .............................................................................................................................................................. 4
3. WARRANTY...................................................................................................................................................................................... 4
4. TECHNICAL SPECIFICATIONS ............................................................................................................................................................. 4
4.1. OPERATING LIMITS..........................................................................................................................................................................................................................4
4.2. ELECTRICAL SPECIFICATIONS FOR STANDARD MOTORS...........................................................................................................................................................5
4.3. ELECTRIC HEATING RESISTANCES .................................................................................................................................................................................................5
4.4. DIMENSIONS....................................................................................................................................................................................................................................5
5. HANDLING........................................................................................................................................................................................ 6
5.1. NET WEIGHT.....................................................................................................................................................................................................................................6
6. INSTALLATION .................................................................................................................................................................................. 6
6.1. CLEARANCE......................................................................................................................................................................................................................................6
6.2. UNIT LOCATION ...............................................................................................................................................................................................................................7
6.3. INSTALLATION INSTRUCTIONS ......................................................................................................................................................................................................7
7. HYDRAULIC CONNECTIONS............................................................................................................................................................... 8
7.1. OPERATING FACE ............................................................................................................................................................................................................................8
7.2. COIL WATER CONNECTIONS...........................................................................................................................................................................................................8
7.3. COIL WATER VOLUME .....................................................................................................................................................................................................................9
7.4. CONDENSATE DRAIN CONNECTION............................................................................................................................................................................................10
7.5. INSTALLATION OF THERMOSTAT OR TEMPERATURE SENSOR (CHANGE OVER).................................................................................................................10
7.5.1. TRM-FA..................................................................................................................................................................................................................................................................... 10
7.5.2. TAE20 OR AQUANET OR AQUASIMP.................................................................................................................................................................................................................... 10
7.6. WATER QUALITY............................................................................................................................................................................................................................11
8. AERAULIC CONNECTIONS................................................................................................................................................................ 12
8.1. DUCT CONNECTION DIMENSIONS...............................................................................................................................................................................................12
9. ELECTRICAL CONNECTIONS............................................................................................................................................................. 13
9.1. WIRING DIAGRAM AND LEGEND ................................................................................................................................................................................................13
9.2. POWER SUPPLY .............................................................................................................................................................................................................................13
9.3. ELECTRICAL CONNECTIONS .........................................................................................................................................................................................................13
9.4. REGULATION ..................................................................................................................................................................................................................................14
9.4.1. THERMOSTAT LOCATION ........................................................................................................................................................................................................................................ 14
9.5. ELECTRIC HEATING RESISTANCES ...............................................................................................................................................................................................14
10. COMMISSIONING.......................................................................................................................................................................... 15
10.1. PRE-START CHECK LIST ..............................................................................................................................................................................................................15
10.1.1. ELECTRICAL CHECK ............................................................................................................................................................................................................................................... 15
10.1.2. HYDRAULIC CHECKS ............................................................................................................................................................................................................................................. 15
10.1.3. VISUAL CHECK ....................................................................................................................................................................................................................................................... 15
10.1.4. DUCTING................................................................................................................................................................................................................................................................. 15
11. OPERATION .................................................................................................................................................................................. 16
11.1. AQUANET OR AQUASIMP ..........................................................................................................................................................................................................16
11.2. ROOM THERMOSTAT TRM-FA ...................................................................................................................................................................................................16
11.2.1. USE.......................................................................................................................................................................................................................................................................... 16
11.2.2. SWITCHES............................................................................................................................................................................................................................................................... 16
11.2.3. DIMENSIONS.......................................................................................................................................................................................................................................................... 16
11.2.4. ELECTRICAL CONNECTIONS................................................................................................................................................................................................................................. 17
11.2.5. WALL MOUNTING ................................................................................................................................................................................................................................................. 17
11.2.6. TECHNICAL CHARACTERISTICS............................................................................................................................................................................................................................ 17
11.2.7. FINAL OPERATIONS .............................................................................................................................................................................................................................................. 17
11.3. TAE20 ROOM THERMOSTAT......................................................................................................................................................................................................18
11.3.1. FIELDS OF APPLICATION ...................................................................................................................................................................................................................................... 18
11.3.2. DESCRIPTION ......................................................................................................................................................................................................................................................... 18
11.3.3. ADJUSTMENT AND CONTROL ELEMENTS.......................................................................................................................................................................................................... 18
11.4. OPERATING CHECK LIST .............................................................................................................................................................................................................19
11.4.1. GENERAL................................................................................................................................................................................................................................................................ 19
11.4.2. ELECTRICAL............................................................................................................................................................................................................................................................ 19
11.4.3. FINAL CHECK.......................................................................................................................................................................................................................................................... 19
12. FINAL TASKS ................................................................................................................................................................................ 19
13. MAINTENANCE............................................................................................................................................................................. 20
13.1. REGULAR MAINTENANCE..........................................................................................................................................................................................................20
13.2. GENERAL INSPECTION ...............................................................................................................................................................................................................20
13.3. AIR FILTER ....................................................................................................................................................................................................................................20
13.4. CONDENSATE TRAY ....................................................................................................................................................................................................................21
13.5. COILS.............................................................................................................................................................................................................................................21
13.6. FAN MOTOR ASSEMBLY.............................................................................................................................................................................................................21
13.7. ELECTRICAL SECTION..................................................................................................................................................................................................................21
13.8. WATER PIPES ...............................................................................................................................................................................................................................21
13.9. SERVICING CHECKLIST................................................................................................................................................................................................................22
13.9.1. CASING ................................................................................................................................................................................................................................................................... 22
13.9.2. CONDENSATE DRAIN PAN ................................................................................................................................................................................................................................... 22
13.9.3. COILS....................................................................................................................................................................................................................................................................... 22
13.9.4. ELECTRICAL EQUIPMENT...................................................................................................................................................................................................................................... 22
14. IN CASE OF WARRANTY - MATERIAL RETURN PROCEDURE ......................................................................................................... 22
15. ORDERING SERVICE AND SPARE PARTS ORDER ........................................................................................................................... 22

English
3VH
POWER SUPPLY MUST BE
SWITCHED OFF
BEFORE STARTING WORK IN THE
ELECTRIC CONTROL BOX
1. GENERAL RECOMMENDATIONS
The purpose of this Manual is to provide users with instructions for installing, commissioning, using and
maintaining the units.
It does not contain the complete description of all the maintenance operations guaranteeing the unit’s long
life and reliability. Only the services of a qualied technician can guarantee the unit’s safe operation over a
long service life.
Please read the following safety precautions very carefully before installing the unit.
1.1. SAFETY DIRECTIONS
Cutoff power supply before starting to work on the appliance.
When making the hydraulic connections, ensure that no impurities are introduced into the pipe work.
The fan-coil units may contain a small amount of oil incompatible with plastic polyethylene piping (PER/
HTA/PVC). The coil should be rinsed out before use to avoid any problem.
It is the installer’s responsibilityto contact theirpipe supplier and take into account the general instructions
for the use of plastic pipes.
The manufacturer declines any responsibility and the warranty becomes void if these instructions are
not respected.
If you meet a problem, please call the Technical Department of your area.
If possible, assemble the compulsory or optional accessories before placing the appliance on its nal location.
(see instructions provided with each accessory).
In order to become fully familiar with the appliance, we suggest to read also our Technical Instructions.
The information contained in these Instructions are subject to modication without advance notice.
1.2. WARNING
Follow the safety rules in forces when you are working on your appliance.
The installation, commissioning, use and maintenance of these units should be performed by qualied
personnel having a good knowledge of standards and local regulations, as well as experience of this type
of equipment.
The unit should be handled using lifting and handling equipment appropriate to the unit's size and weight.
Any wiring produced on site must comply with the corresponding national electrical regulations.
Make sure that the power supply and its frequency are adapted to the required electric current of operation,
taking into account specic conditions of the location and the current required for any other appliance
connected to the same circuit.
The unit must be EARTHED to avoid any risks caused by insulation defects.
It is forbidden to start any work on the electrical components if water or high humidity is present on the
installation site.

English
4VH
2. INSPECTION AND STORAGE
The appliances are delivered fully assembled, factory tested and ready to operate.
Any modication to the units without the manufacturer’s prior approval, shall automatically render the
warranty null and void.
The following conditions must be respected in order to maintain the validity of the warranty:
²Commissioning shall be performed by specialised technicians from technical services approved by
the manufacturer.
²Maintenance shall be performed by technicians trained for this purpose.
²Only Original Equipment spare parts shall be used.
²All the operations listed in the present manual shall be performed within the required time limits.
THE WARRANTY SHALL BE NULL AND VOID IN THE EVENT
OF NON-COMPLIANCE WITH ANY OF THE ABOVE CONDITIONS.
3. WARRANTY
4. TECHNICAL SPECIFICATIONS
4.1. OPERATING LIMITS
Water pipes
Maximum operating pressure 16 bar
Minimum inlet temperature + 5 °C
Maximum inlet temperature + 90 °C
Premises air temperature Minimum temperature 5 °C
Maximum temperature 32 °C
Supply voltage 230 V ± 10 % / 1 ph / 50 Hz / 60 Hz
At the time of receiving the equipment carefully cross check all the elements against the shipping documents
in order to ensure that all the crates and boxes have been received. Inspect all the units for any visible or
hidden damage.
In the event of shipping damage, write precise details of the damage on the shipper’s delivery note and
send immediately a registered letter to the shipper within 48 hours, clearly stating the damage caused.
Forward a copy of this letter to the manufacturer or his representative.
Never store or transport the unit upside down. Do not stand or transport the machines with casing on end.
For storing, each carton is marked with "up" arrows. It must be stored indoors, completely protected from
rain, snow etc. The unit must not be damaged by changes in the weather (high and low temperatures).
Excessively high temperatures (above 60 °C) can harm certain plastic materials and cause permanent
damage. Moreover, the performance of certain electrical or electronic components can be impaired.

English
5VH
4.2. ELECTRICAL SPECIFICATIONS FOR STANDARD MOTORS
Motors - 230 V / 1 ph / 50 Hz / 60 Hz
Electric heating resistances - 230 V / 1 ph / 50 Hz / 60 Hz
(*) Current and power drawn by the motor in operation at 230 V / 1 Ph / 50 Hz, unit not tted with ducting
and with 0 Pa pressure available for a unit with a G3 lter. Rectangular duct inlet and outlet
(*) Current and power drawn by the motor in operation at 230 V / 1 Ph / 50 Hz, unit not tted with ducting
and with 0 Pa pressure available for a unit with a G3 lter. Circular duct inlet and outlet.
4.3. ELECTRIC HEATING RESISTANCES
Unit size
VH07 VH15 VH18
Current
absorbed
(A) *
Power
absorbed
(w)*
Current
absorbed
(A) *
Power
absorbed
(w)*
Current
absorbed
(A) *
Power
absorbed
(w)*
Speed
V1 0.66 132 0.93 180 0.93 180
V2 0.75 163 1.33 271 1.33 271
V3 0.82 182 2.00 421 2.00 421
V4 0.88 201 2.52 587 2.52 587
V5 0.98 222 3.17 675 3.17 675
Unit size
VH21 VH24 VH27
Current
absorbed
(A) *
Power
absorbed
(w)*
Current
absorbed
(A) *
Power
absorbed
(w)*
Current
absorbed
(A) *
Power
absorbed
(w)*
Speed
V1 0.93 180 2.00 420 2.00 420
V2 1.33 271 2.40 530 2.40 530
V3 2.00 421 3.00 673 3.00 673
V4 2.52 587 3.85 870 3.85 870
V5 3.17 675
Unit size Capacity (W)
BE1 BE2 BE3
VH07 1000 1500 2000
VH15 / VH18 / VH21 1000 2000 3000
VH24 / VH27 1000 2000 3000
SEE APPENDIX
4.4. DIMENSIONS

English
Avoid contact with the coil surfaces and their sharp edges as they can be dangerous.
Caution
The unit is not designed to withstand weights or stresses from adjacent equipment, pipe work or
constructions. Any foreign weight or stress on the unit structure could lead to a malfunction or a
collapse with dangerous consequences for personnel and property. In such an event, the warranty
shall be null and void.
Caution
A
C
B
6VH
5. HANDLING
Always take great care when handling the unit.Do not lift the unit by its condensate outlet, by the water
connectors or by the duct unions (rectangular, circular or oblong). Use a fork lift truck to make it easier to
install the unit.
Unit size A
(mm) B (mm) C (mm)
VH07 1000 300 200
VH15 1000 430 200
VH18 1000 430 200
VH21 1000 430 200
VH24 1000 500 200
VH27 1000 500 200
5.1. NET WEIGHT
6. INSTALLATION
Unit size Weight Circular / circular version
(including new air ow
plenum)
Rectangular / rectangular
version Rectangular / rectangular version + new air ow
plenum
VH07 kg 48 42 /
VH15 kg / 63 69
VH18 kg / 65 71
VH21 kg / 67 73
VH24 kg / 76 84
VH27 kg / 80 88
Weight in functioning order, without valve
6.1. CLEARANCE
Minimum free clearance for maintenance
A: Clearance for access to the electrical control box.
Clearance for access to the hydraulic connections.
B : Clearance for removing the lter and access to the fan motor assembly.
C: Clearance for access side opposed to the electrical control box and the hydraulic connections.

English
The unit base shall be arranged as indicated in the manual. There could be a risk of personal injury
or damage to property in the event of the unit being incorrectly supported.
Caution
Do not install the unit in a machinery room or a kitchen where vapours or oil mist could pass
through the unit.
Do not install the unit in a laundry or in very damp areas (bathroom, sauna, etc.).
Caution
BC
A
D
7VH
6.2. UNIT LOCATION
1. The units are designed for installation above a suspended ceiling.
2. Install the unit in a location where the structure is capable of withstanding the weight of the unit.
3. Install the unit in a location which enable the unit's aeraulic inlet and outlet connections to be made.
4. Install the unit in a location providing for easy condensate evacuation.
5. Ensure that there is sufcient free space between the suspended ceiling and the solid ceiling for the
unit to be located.
6. Take care to leave adequate space around the unit for maintenance access (for minimum free space
on the service elevation for access to the lter and the fan motor assembly).
6.3. INSTALLATION INSTRUCTIONS
1. The unit is designed to be suspended on threaded rods or screw-spikes to be supplied by the
installer. The mounting lugs with slot type holes are tted to the upper part of the unit.
2. Attach the 4 threaded rods or spike-screws to the solid ceiling in accordance with the diagram
opposite. Place 4 nuts and washers on each threaded rod.
3. Lift up the unit and slide the 4 threaded rods through the mounting lugs slots (the unit casing must
not touch the ceiling).
4. Attach the unit with 4 further rmly tightened washers, nuts and lock nuts. We recommend tting
rubber blocks to prevent any risks of vibration be transmitted to the structure.
5. Lock the unit in its nal location and level it off with a spirit level in order to guarantee correct
operation and condensate evacuation.
6. The unit must be installed so that the water drains towards the evacuation connection.
Mounting lugs
TOP VIEW
Unit size A
(mm) B (mm) C (mm) D (mm)
VH07 1240 41 36 561
VH15 1420 41 36 661
VH18 1420 41 36 661
VH21 1420 41 36 661
VH24 1540 41 31 666
VH27 1540 41 31 666

English
The fan-coil units may contain a small amount of oil incompatible with plastic polyethylene piping
(PER/HTA/PVC). The coil should be rinsed out before use to avoid any problem.
It is the installer’s responsibility to contact their pipe supplier and take into account the general
instructions for the use of plastic pipes (PER/HTA/PVC).
Caution
To avoid damaging the coil, tighten the water pipe connectors on each header
using a counter-wrench.
When installing the unit, take care not to push the coils headers towards the
inside of the unit when tightening the connections.
Caution
In certain cases the tubes of bottom are not drainable. However, the hydraulic connections on the
lower part of the coil should be vented to the atmosphere by disconnecting all connectors, valves
and pipes from the main hydraulic circuit.
Caution
8VH
7. HYDRAULIC CONNECTIONS
The units VH are equipped, in their standard 2-pipe conguration, with a main chilled water coil with 3,4
and 5 rows.
In the 4-pipe conguration, the unit is equipped , in the same nned block, with chilled water coil and
heated water coil (on an independent circuit).
The coil headers are equipped with air vent and drain plug. To vent the air from the coil, use the air vent
located on the upper part of the upper header. To drain the water, use the drain plug located on the lower
part of the lower header.The coil(s) MUST be drained of uid in the event of the unit being kept out of
service in buildings subjected to negative ambient temperatures with the possibility of the coil icing.
The coil(s) is/are equipped with bleed valves for this purpose. To drain the coil, use the bleed valves located
on the lower part of the lower collector.
The supply water (2-pipe and 4-pipe coils) should pass through the bottom header.
Flexible pipes are recommended for connecting the coils.Take care not to over-tighten thewater connections.
Over-tightening can lead to excessive strains on the materials in the event of major temperature variations.
All the water pipes must be insulated to avoid sweating and heat loss.
7.1. OPERATING FACE
The service panel of the Left / Right versions is dened according to the location of the hydraulic unions
when the unit is viewed by the operator from the "blowing face".
Note: In the example below, the operating face is on the left.
OPERATING
FACE
7.2. COIL WATER CONNECTIONS

English
The installation and operating conditions require the MANDATORY tting of a valve ON the unit
OR/AND upstream in the hydraulic circuit. This is to prevent chilled water from circulating in the
appliance when the fan is not operational (condensation issue) or to prevent the simultaneous
circulation of chilled water and hot water in a 4-pipes exchanger.
Caution
If the water pipes are exposed to temperatures below 0 °C, take the necessary precautions
(draining, antifreeze, etc.) to avoid the coils freezing. Adding antifreeze to the circuit reduces the
unit's performance (if necessary, please contact our sales network).
Caution
9VH
For 4-pipe fan coil units (VH07) with a hydraulic connection left side, the hot coil is located after the cold
coil, in relation to the direction of the air.However, for units (VH07) on which a straight hydraulic connection
is chosen, the hot battery is located before the cold battery. For 4 tube fan-convector units (VH15/VH18/
VH21/VH24/VH27), the hot battery is always located after the cold battery from the airow point of view.
Valves are not available for model VH27. Valves for models VH07 are supplied mounted, those for models
VH15/VH18/VH21/VH24 are supplied loose without tubing.
Unit size Version coil connections
VH07 2 & 4 Pipes Female threaded type Ø1/2"
VH15 2 Pipes 2 male threaded end Rc 1"
4 Pipes 2 male threaded end Rc 1" + 2 male threaded end Rc 3/4"
VH18 2 Pipes 2 male threaded end Rc 1"1/4
4 Pipes 2 male threaded end Rc 1" + 2 male threaded end Rc 3/4"
VH21 2 Pipes 2 male threaded end Rc 1"1/4
4 Pipes 2 male threaded end Rc 1" + 2 male threaded end Rc 3/4"
VH24 2 Pipes 2 male threaded endRc 1"1/4
4 Pipes 2 male threaded end Rc 1"1/4 + 2 male threaded end Rc 3/4"
VH27 2 Pipes 2 male threaded end Rc 1"1/4
4 Pipes 2 male threaded end Rc 1"1/4 + 2 male threaded end Rc 3/4"
The use of regulation valves (factory-tted, supplied as an accessory or by the client) is mandatory to ensure
that the appliance operates correctly.
7.3. COIL WATER VOLUME
Unit size
Water volume (in liters)
2-pipes 4-pipes
Cooling Heating
VH07 2.3 1.9 0.6
VH15 3.7 3.1 1.0
VH18 5.4 3.7 1.7
VH21 6.5 5.2 1.7
VH24 7.0 5.8 1.7
VH27 8.9 7.3 1.9

English
After installing the unit, be sure that there is no more longitudinal and transversal counterslopes
avoiding condensate evacuation.
Caution
B
AA
10 VH
The temperature sensor (change over) supplied is to
be tted to the water inlet tube.
Before assembling the change over sensor, coat the
tube with heat conducting paste to guarantee that
the real temperature is recorded.
The M and B2 change over sensor inputs can
be connected to the mains power supply. If it is
necessary to extend the sensor wires, ensure that
wires appropriate for this voltage are used.
TAE20: SCH
AQUANET: WPT
AQUASIMP: WPT
7.4. CONDENSATE DRAIN CONNECTION
A condensate tray is supplied with a 5/8" exterior diameter copper drain hole.
Ensure that the condensed water will drain properly from the tray, which must be connected to the main
evacuation pipe.
The evacuation pipe must be installed with a downhill angle. Check that the evacuation pipe work has a
siphon which must be made in accordance with the illustration below. Moreover, the evacuation pipe must
be insulated to prevent condensation forming on the outside of the pipe.
All foreign bodies must be removed from the condensate tray.
Siphon for condensate evacuation
The height A must be equal to 2 times the value
of the negative pressure present in the condensate
reception zone
Example :
negative pressure = 40 mm
height A = 80 mm, height B = 160 mm.
Check that the condensates drainage hose is connected and allows liquid to drain freely.
Check that condensates actually drain properly (installation with or without drainage pump) by
pouring water into the condensates tray (pump electricity supply switched on).
VH
VH
The thermostat (change-over switch)
supplied is to be mounted on the water
supply pipe.
7.5. INSTALLATION OF THERMOSTAT OR TEMPERATURE SENSOR (CHANGE OVER)
7.5.1. TRM-FA
7.5.2. TAE20 OR AQUANET OR AQUASIMP

English
If the water circuit is to be drained for a time exceeding one month, the circuit must be fully
charged with nitrogen to prevent any risk of corrosion by differential venting.
Caution
The manufacturer is not liable for recommendations in terms of water treatment (call a specialized
company).
However, this matter has a critical nature, and particular care must be given to ensure that the type
of treatment applied is effective.
The liability of the manufacturer or its representative will not be sought when non treated water
or non compliant quality water is used.
Caution
11VH
7.6. WATER QUALITY
The water must be analyzed; the hydraulic network system installed must include all elements necessary
for water treatment: lters, additives, intermediate exchangers, drain valves, vents, check valves, etc.,
according to the results of the analysis.
Using improperly treated or non treated water in the VH may cause scaling, erosion, corrosion or algae
or sludge deposits in the exchangers. Refer to a specialist skilled in water treatment to determine any
treatment to apply. The manufacturer will not be held liable for damages caused when non treated or
improperly treated water, demineralized water, salty water or sea water are used.
Apply the following guidelines :
²No NH4+ammonium ions in the water, highly detrimental to copper. <10mg/l
²Cl-chloride ions are detrimental to copper with a risk of puncture by picking corrosion. <10mg/l.
²SO42- sulphate ions may cause perforating corrosion. < 30mg/l.
²No uoride ions (<0.1 mg/l)
²No Fe2+ and Fe3+ ions, particularly in case of dissolved oxygen. Fe< 5mg/l with dissolved oxygen <
5mg/l. The presence of these ions with dissolved oxygen indicates corrosion of steel parts, likely
to generate corrosion of copper parts under Fe deposits, particularly in the case of multitubular
exchangers.
²Dissolved silica: silica is an acid element of water and may also cause corrosion. Content < 1mg/l.
²Water hardness: TH > 2.8K. Values between 10 and 25 may be recommended. This facilitates scaling
deposits likely to limit copper corrosion. Excess TH values may lead to clogging the pipes.
²TAC<100
²Dissolved oxygen: Prevent any sudden change in the water's oxygenation conditions. Also, avoid
deoxygenating water by sparging inert gas as well as overoxygenating it by pure oxygen sparging.
Disturbing oxygenation conditions destabilizes copper hydroxides and particle salting-out.
²Electrical Resistivity - Conductivity: The higher the resistivity, the slower the corrosion. Values above
3000 ohm/cm are preferred. A neutral environment favours maximum resistivity. For electrical
conductivity, values around 200-600 S/cm can be recommended.
²pH: neutral pH at 20°C (7 < pH < 8)

English
In no event should one or more of the apertures be blocked.
If one of these apertures were to be blocked, it would create a drop in unit available static pressure,
and poor air irrigation on the coil surface, leading to a signicant drop in unit performance and
possible fan motor damage.
Caution
12 VH
8. AERAULIC CONNECTIONS
Only the supply air plenum is insulated.
The return air plenum is tted with a pre-cut inlet for fresh air intake:
²Ø100mm or Ø125mm (VH07)
²Ø160mm (VH15 - VH18 - VH21)
²Ø200mm (VH24 - VH27)
SEE APPENDIX
8.1. DUCT CONNECTION DIMENSIONS

English
To perform electrical wiring of the unit, please refer to the wiring diagram pasted on the unit
casing.
Caution
13VH
WARNING
Before carrying out any work on the equipment,
make sure that the electrical power supply is
disconnected and that there is no possibility
of the unit being started inadvertently.
Non-compliance with the above instructions
can lead to injury or death by electrocution.
9. ELECTRICAL CONNECTIONS
SEE APPENDIX
IMPORTANT
Short circuit protection shall be provided. This protection shall comprise fuses or circuit breakers with high
breaking capacity, mounted on the distribution board.
²Fuse available as an option
²Cable not supplied
The electrical installation must be performed by a fully qualied electrician, and in accordance with local
electrical standards and the wiring diagram corresponding to the unit model.
Any modication performed without our prior authorisation may result in the unit’s warranty being declared
null and void.
The power supply cable section must be sufcient to provide the appropriate voltage to the unit’s power
supply terminals, both at start-up and under full load operating conditions.
All fan coil units are designed for operation under 230 volts, single phase, 50 or 60 cycles .
A voltage variation of ± 10 % with regard to nominal voltage 230 V is acceptable.
Before making the connections, be sure that the available power supply has the same voltage and phase as
that shown on the fan coil unit nameplate.
Line and low voltage wiring must be done in accordance with electrical code whichever is applicable.
Earthing of unit is imperative.
Manufacturer or its representative cannot be held responsible for accidents resulting from incorrect or
non-existent earthing.
A device to disconnect all the power conductors with an approved minimum opening distance must be
included in the mains power supply according to best installation practices.
SE3931 models VH07/VH15/VH18/VH21/VH24/VH27 230V 50Hz/60Hz +/- 10%
SE3932 models VH07 + Aquanet 230V 50Hz/60Hz +/- 10%
SE3933 models VH15/VH18/VH21/VH24/VH27 + Aquanet 230V 50Hz/60Hz +/- 10%
9.1. WIRING DIAGRAM AND LEGEND
9.2. POWER SUPPLY
9.3. ELECTRICAL CONNECTIONS

English
Do not connect several units to a single ventilation speed selector or regulation thermostat
without using auxiliary relays.
Check that the current absorbed by the motors is compatible with the cut-out capacity of the
control device contacts.
Caution
The electrical heating resistances must never operate without ventilation.
Caution
14 VH
9.4. REGULATION
As standard, the units are supplied without regulation equipment.
However, certain control devices (fan speed selector, remote thermostat, etc.) can be supplied according to
request.
In all events, these regulation devices are only intended to control a single unit.
Factory mounted electrical heaters incorporate a self-resetting thermal cut-out and a non-self-resetting
thermal cut-out which cut the power supply to the heaters in the event of an abnormal airow reduction.
The wiring diagram afxed to the unit illustrates the connections to be made.
The unit must be installed and tted in accordance with current safety standards by a
qualied technician.
Fitting height: about 1.50 m above oor level.
Take care not to locate the thermostat in draughts created by doors and windows.
Also ensure that the thermostat is located in the room’s normal thermal currents and that it is not located
in shelving or covered by curtains.
Any source of parasitic heat negatively inuences temperature regulation accuracy. Therefore, avoid the
sun’s rays or proximity to portable heating devices, electric lights, chimneys, televisions, etc...
9.4.1. THERMOSTAT LOCATION
9.5. ELECTRIC HEATING RESISTANCES

English
15VH
10. COMMISSIONING
10.1. PRE-START CHECK LIST
10.1.1. ELECTRICAL CHECK
1. Electrical installation has been carried out according to unit wiring diagram and the Supply Authority
Regulations.
2. Size fuses or circuit breaker has been installed at the main switchboard.
3. Supply voltages as specied on unit wiring diagram.
4. All cables are properly identied and tight connected at the unit.
5. the cables and wires are clear of or protected from pipework and sharp edges.
10.1.2. HYDRAULIC CHECKS
1. Check that the water inlet and outlet connections are correct.
2. Check that the hydraulic circuit is lled correctly and that the uid ows freely without any signs of
leaks or air bubbles. When ethylene glycol anti-freeze is used, check that the concentration level is
correct.
3. Adjust the water ow in order to comply with the specications.
4. Check that the water quality complies with the indicated standards.
5. Check that the condensates drainage hose is connected and allows liquid to drain freely.
Check that condensates actually drain properly (installation with or without drainage pump) by
pouring water into the condensates tray (pump electricity supply switched on).
10.1.3. VISUAL CHECK
1. Clearances around unit including outdoor air entry and discharge openings and service accesses.
2. Unit mounted as specied.
3. For loose or missing bolts or screws.
10.1.4. DUCTING
1. Connections exible type, secure and detachable for service access.
2. Seams and joints airtight.
3. Check that the air lter is clean and correctly installed.
4. Check that the fan wheel is rotating free on it shaft.

English
16 VH
Switch 0 - I
²ON "I"
²OFF "0"
Linear switch
Linear switch
²cooling
²heating
AQUANET AQUASIMP
11. OPERATION
The unit operates in different ways, depending of the control options that have been installed:
SEE APPENDIX
²AQUANET
²AQUASIMP
SEE SPECIFIC MANUAL
²TRM-FA
²TAE 20
Medium speedHigh Speed Lown Speed
The room thermostat of the air conditioner regulates the room
temperature. It is designed for closed, dry rooms such as ats,
ofces, etc.
Maximum acceptable relative humidity of the air : 95%. This
value should not be exceeded.
Avoid condensation.
11.1. AQUANET OR AQUASIMP
11.2. ROOM THERMOSTAT TRM-FA
11.2.1. USE
11.2.2. SWITCHES
11.2.3. DIMENSIONS

English
17VH
1. Setting the temperature range
e.g. max. 25°C, min. 12°C.
2. Remove the control knob.
3. Use a pointed object to align the mark on the red ring (max. value) with the desired maximum
temperature (25°C), turning the red index opposite the outside numbers counterclockwise.
4. Use a pointed object to align the mark on the blue ring (min. value) with the desired minimum
temperature (12°C), turning the blue index opposite the inside numbers clockwise.
5. Install the control knob.
The temperature ranges can be graduated in:
²degrees Celsius °C
from 5°C to 30°C
²number 1 to 6
1=5°C
2=10°C
3=15°C
4=20°C
5=25°c
6=30°C
Operating voltage 230V 50Hz
Contact conguration SPDT
Temperature range 5 to 30°C
Switching current at 230V AC 6A (cos ϕ=1) / 3A (cos ϕ=0.6)
Switching differential approx. 0,5 K
Sensor system < bimetal
Switches
ON / OFF
mode of operation
fan speed
11.2.4. ELECTRICAL CONNECTIONS
Connection of the thermostat TRM-FA.
Connections should be made according to the diagram (SEE APPENDIX).
Max. cross-sectional area of wires : 2,5 mm2
11.2.5. WALL MOUNTING
²Remove the thermostat control knob, the screw and the cover.
²On a at surface, mount the control panel using plugs and screws.
²Install the cover, the screw and the thermostat control knob.
11.2.6. TECHNICAL CHARACTERISTICS
11.2.7. FINAL OPERATIONS
11.2.7.1. ADJUSTMENT OF THE TEMPERATURE RANGE
The room thermostat is set in the factory for a minimum temperature of +5°C and a max. temperature of
+30°C.
Two rings are provided inside the knob for reducing the temperature range.
²Example: 12°C to 25°C.
11.2.7.2. ADJUSTMENT PROCEDURE

English
2 3 4
5 6 1
18 VH
DIP
switch ref. 6 Function N° "ON" position "OFF" position
1Fan control Fan control is temperature
dependent in all modes In normal mode, the fan control is independent of the temperature 1
2Mode changing via an external
switch Switching between normal mode and energy saving mode Switching between normal mode and stand by 1
3Switch action direction for external
mode switching
Switch activated when the switch is
closed
(N.O. "Normally open") 1
Switching activated when the switch
is open
(N.C. "Normally close")
4Stand by Antifreeze control deactivated Antifreeze control activated 1
5Differential 1 K in heating mode1
0,5 K in cooling mode 4 K in heating mode 2 K in cooling mode
6Neutral zone in normal mode 2 K 15 K
7Temperature setting variance 2 K 14 K
8Electric heating Activated in cooling mode1Deactivated in cooling mode
11.3. TAE20 ROOM THERMOSTAT
11.3.1. FIELDS OF APPLICATION
²Regulating ambient temperature in rooms heated or cooled.
²Opening and closing the valve.
²Cutting in and out the electric heating.
²Controlling the three fan speed.
11.3.2. DESCRIPTION
The unit comprises two parts:
²A plastic case, housing the electronics, the controls and an internal ambience sensor.
²A mounting plate.
The case is hooked onto the tted mounting plate, then click fastened.
The screw terminal connections are located on the mounting plate, with the DIP switches on the back of
the case.
11.3.3. ADJUSTMENT AND CONTROL ELEMENTS
²Operating mode switch "ON-OFF" and manual fan
speed selection).
²Electro-luminescent diodes for displaying the heating
and cooling modes and the fan.
²Minimum temperature setting limiter (adjustable by
increments of 1K). Mechanical stop accessible by
removing the button 5.
²Maximum temperature setting limiter (adjustable
by increments of 1K). Mechanical stop accessible by
removing the button 5.
²Ambient temperature setting adjustment button.
²Set of DIP switches.
REFER TO SPECIAL TAE 20 ROOM THERMOSTAT MANUAL
1Factory setting