General information
42N - FAN COIL UNITS
After installation thoroughly test system operation and explain all •
system functions to the owner.
All of the manufacturing and packaging materials used for your •
new appliance are compatible with the environment and can be
recycled.
Dispose of the packaging material in accordance with local •
requiremements.
When installing the electric heater kit and after connecting the •
electric cables, cover the connectors using the silicon rubber caps.
Check that the coil is xed to the structure to ensure its correct
ground connection.
Unit operation
In order to avoid electric shock, re or injury, stop the unit and •
disconnect the safety switch in case of abnormal events (such as smell
of burning) and call Carrier Service for further instructions.
Do not place containers lled with liquids or other objects onto the unit.•
Maintenance
WARNING: Disconnect the mains power supply prior to any maintenance
operations or prior to handling any internal parts of the unit.
A routine maintenance should be carried out on the unit to check the •
correct operation of the electric connections and protection devices.
Maintenance operations must be carried out by specially trained •
personnel.
Do not attempt to repair, move, modify or re-install the unit on your •
own. To avoid electric shock or re make sure these operations are
carried out by qualied personnel only.
Contact the qualied service if one of the following events takes place:•
- hot or damaged power supply cable;
- unusual noise during operation;
- frequent operation of the protection devices;
- unusual smell (such as smell of burning).
Choosing the installation site
Choose an area free from obstructions which may cause irregular air •
distribution and/or return.
Check that the wall surface is at enough to allow easy and safe •
installation of the unit. The wall structure should be strong enough
to carry the unit weight and avoid deformation, rupture or vibration
during operation.
Consider using an area where installation is easy.•
Choose a position that allows for the clearances required (see •
drawing).
Look for a position in the room which assures the best possible air •
distribution.
Install unit in a position where condensate can easily be piped to an •
appropriate drain.
Positions to avoid:
Exposed to direct sun.•
Too close to heat sources.•
On humid walls or positions with water hazard, e.g. laundry premises.•
Exposure to oil vapours (e.g. kitchens, workshops).•
Where curtains or furniture may obstruct free air circulation.•
… any obstruction of the unit air outlet or return. Leave 1 metre
minimum of free space (See g. 1)
… exposure to oil vapours (See g. 2)
… installation in areas with high frequency waves (See g. 3)
… any rise in the condensate drain piping.
… horizontal condensate drain piping with less than 2% slope
(See g. 4)
... slack on electrical connections (See g. 5)
... disconnecting water connections after installation (See g. 6)
… exposure to direct sunshine, when unit is operating in cooling mode;
always use shutters or shades (See g. 7)
… positions too close to heating sources which may damage the unit
(See g. 8)
… connecting condensate piping to sewage system drain without
appropriate trap (See g. 9)
… only partial insulation of the piping (See g. 10)
… installation not correctly levelled which will cause condensate
dripping (See g. 11)
… attening or kinking pipes or condensate pipes (See g. 12)
Warnings: avoid...
Fig.13.
Dimensions (mm) and weight, cabinet unit
X . Cabinet version
. Slots for wall vertical xing
. Condensate discharge Ø 20 mm O.D. drain
connection
. Cover panels (accessories)
. Supporting feet (accessories)
. Slots for horizontal ceiling xing
Dimensions (mm) and weight, concealed unit
Y . Concealed version
. Condensate discharge Ø 20 mm O.D. drain
connection
. Supporting feet (accessories)
. Cool Ø 3/4” gas female
. Heat Ø 1/2” gas female
* Only for unit E19.
Fig.16.
1 . Minimum distance from the wall
Fig.17.
Supporting feet and cover panels assembly for
oor-mounted vertical unit
Fig.18.
Example of installation of unit with cabinet
2 . Turn by 180°
Fig.18A.
Example of vertical installation of concealed unit
Fig.18B.
Distance between panel – concealed unit
A . Intake grille size
B . Supply grille size
C . Panel size
Fig.19.
3 . Screw anchor with double screw
4 . Air vent
Fig.21.
Space for water connections
Front view
. IN
. OUT
. Cool Ø 3/4” gas female
. Heat Ø 1/2” gas female
. Condensate drain
. Floor
Fig.22.
Space for water connections
Top view
Legend
Fig.23-24-25.
5 . Control box panel
6 . Hooks for control xing
7 . Temperature sensor
8 . No. 2 screws for coil earthing
9 . Front drain pan
10. Rubber tabs for coil hook
11. Thermoelectric valve head
12. Cold water circuit
13. Hot water circuit
Fig.27.
Control box panel for versions without electric
heater
. Control connection cables
. Motor connection cables
. Power supply cables (230V ~)
. Cables
. Fan motor capacitor
. Cable holder
. Power supply unit terminal block
. Supplementary motor speed wires
. Utility terminal block
Fig.28.
Control box panel for version with Low Power
electric heater
h. Electric heater cables
i. Fuse Holder
. Control connection cables
. Motor connection cables
. Power supply cables (230V ~)
. Cables
. Fan motor capacitor
. Cable holder
. Power supply unit terminal block
. Supplementary motor speed wires
. Utility terminal block
Fig.28b.
Control box panel for version with High Power
electric heater
h. Electric heater cables
. Control connection cables
. Motor connection cables
. Power supply cables (230V ~)
. Cables
. Fan motor capacitor
. Cable holder
. Power supply unit terminal block
q. Power supply electric heater terminal block
. Supplementary motor speed wires
s. Relay for high power electric heater
. Utility terminal block
Fig.29.
Motor fan wire connections
a blue (motor neutral)
b red (ultra low speed)
c white (medium speed)
d black (super high speed)
e yellow (low speed – not connected)
f orange (high speed – not connected)
Fig.30.
Control type “A”
Fig.31.
Control type “B”
Fig.29-30-31.
14. ON/OFF/fan speed selector
15. Blue LED - cooling operation
16. Seasonal changeover button
17. Red LED - heating operation
18. Yellow LED - automatic operation (only for type “B”)
19. Energy saving button
20. Yellow LED - energy saving operation
21. Temperature knob
Fig.32.
22. Control
23. Screw to close the control
24. Control cable
25. Control box panel
26. Metal plate to x the control
27. Screws
Fig.33.
28. Screw
29. Screw anchor
Fig.34.
30. Minimum temperature sensor (optional)
31. Air sensor
32. Jumper to select remote temperature sensor or
internal sensor
33. Internal temperature sensor
34. Dip-switch selectors
Fig.35.
X . Control internal sensor
Y . Unit - mounted sensor
Fig.36.
35. Protection grille
36. Safety thermostat
Fig.37.
Concealed units size of return/supply duct.
Fig.39-40.
43. Filter tabs
Fig.41.
Tangential unit with “Low Energy Consumption Fan Motor”
Fig.42.
Centrifugal unit single shaft with “Low Energy
Consumption Fan Motor”
Fig.43.
Centrifugal unit dual shaft with “Low Energy
Consumption Fan Motor”
General information
Unit installation
Read this instruction manual thoroughly before using the unit and
keep it for further consultation even after installation.
The unit complies with all applicable standards for EC marking •
(for further details see Declaration of Conformity).
The installation must be carried out by a qualied installer.•
For safety reasons, installers are required to read the general •
information carefully.
Follow all the instructions below to ensure safety.•
Inspect the unit for damage due to improper transport. Do not install •
or use damaged equipment.
To prevent re, explosion or injury, do not operate the unit near •
dangerous substances or close to naked light equipment.
Ensure that national safety code requirements have been followed •
for the main supply circuit. Follow all current national safety code
requirements. Ensure that a properly sized and connected ground
wire is in place.
Check that voltage and frequency of the mains power supply are •
those required for the unit to be installed; the available power must be
adequate to operate any other appliances connected to the same line.
Make sure that properly sized disconnecting and safety switches are •
installed.
The manufacturer declines any liability fror damage resulting from •
modications or errors in the electrical or hydraulic connections.
Failure to observe the installation instructions, or use of the unit under
conditions other than those indicated in the table “Operating limits” of
the unit installation manual, will immediately invalidate the unit warranty.
Installation
Receipt of unit
Check that packaging is undamaged.•
Unpack unit and check immediately for damage during transportation.•
Packaging contains the base unit and, if supplied, the unit cabinet.•
Verify that all components ordered are supplied.•
Unit preparation
Take out and position template printed on the packaging. It is •
advisable to keep cabinet packed until installation is complete.
To install the cabinet, position it onto the base unit and x it to the •
special tabs on the unit rear side and then secure it with the two
screws supplied (See g.14-15).
If the unit is installed at 150 mm from the oor or lower, use the angles •
supplied with the base unit to prevent the user from touching the
moving parts (See g.14-15).
If, instead, the unit is installed higher than 150 mm from the oor, use •
the rear closing grille kit (code 42N0954-42N0955-42N0956-42N0957)
according to the unit size. For horizontal installation at more than 2.5
meters from the oor, the angles supplied need not be used.
For horizontal installation at more than 2.5 meters from the oor, the •
angles supplied need not be used.
Installation
Before proceeding to unit installation, it is recommended to assemble •
the accessories according to the instructions supplied with the kit.
It is advisable to lock the cover on the opposite side to the control or •
on both sides if the control is not positioned on the unit.
Knock out the prepunched part of the cover to insert the screw.•
Furthermore it is possible to lock the control cover.•
CAMBIATO: 16 Power supply unit
terminal block
q. Heating element cable holder
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