Carrier 42SIC Manual

Original document
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
42SIC -42SIR -42SIN -42SIl

2
CONFORMITY
This unit complies with European directives:
• Low tension directive 2014/35/UE
• Electro-magnetic compatibility 2014/30/UE;.
SYMBOLS
The pictograms in the next chapter provide the necessary information for correct, safe use of the machine in a rapid, unmistakable
way
Editorial pictograms
U
User
-Refers to pages containing instructions or information for the user.
I
Installer
-Refers to pages containing instructions or information for the installer
S
Service
-Refers to pages containing instructions or information for the installer TECHNICAL CUSTOMER SERVICE.
Safety pictograms
Generic danger
-Signals to the personnel that the operation described could cause physical injury if not performed according to the safety rules.
Danger of high voltage
-Signals to the personnel that the operation described could cause electrocution if not performed according to the safety rules.
Danger due to heat
-Signals to the personnel that the operation described could cause burns if not performed according to the safety rules.
Do Not
-Refers to actions that absolutely must not be performed.
The illustrations in this document are for illustrative purposes only and not part of any offer for sale or contract. The manufacturer reserves the right to change the design
at any time without notice.

3
CONTENTS
1 - GENERAL......................................................................................................................................................................................4
1.1 - General warnings ......................................................................................................................................................................4
1.2 - Fundamental safety rules..........................................................................................................................................................4
2 - INSTALLATION .............................................................................................................................................................................5
2.1 - Positioning the unit....................................................................................................................................................................5
2.2 - Installation modes .....................................................................................................................................................................5
2.3 - Minimum installation distances..................................................................................................................................................5
2.4 - Side opening .............................................................................................................................................................................6
2.5 - Vertical oor or wall installation .................................................................................................................................................6
2.6 - Horizontal or ceiling installation (42SIC or 42SIN) ....................................................................................................................7
2.7 - Mounting front grill safety support (42SIC)................................................................................................................................7
2.8 - Horizontal or ceiling installation (42SIC or 42SIN) ....................................................................................................................8
2.9 - Hydraulic connections ...............................................................................................................................................................8
2.10 - Condensation discharge..........................................................................................................................................................9
2.11 - Filling the system...................................................................................................................................................................10
2.12 - Evacuating air while lling the system...................................................................................................................................10
2.13 - Electrical connections............................................................................................................................................................10
2.14 - Maintenance.......................................................................................................................................................................... 11
2.15 - Cleaning the outside.............................................................................................................................................................. 11
2.16 - Cleaning air suction lter....................................................................................................................................................... 11
2.17 - Energy saving tips.................................................................................................................................................................13
3 - TROUBLESHOOTING.................................................................................................................................................................14
3.1 - Troubleshooting.......................................................................................................................................................................14
3.2 - Table of anomalies and remedies............................................................................................................................................14

4
1 - GENERAL
1.1 - General warnings
After unpacking, make sure that all the components are present. If not, contact the CARRIER who sold the unit to you.
CARRIER Fan Coil must be installed by an authorised installer who, on completion of the work, will release a declaration of
conformity to the client in respect of the laws in force and the indications given by CARRIER in the instructions leaet supplied together
with fan coil.
These units have been designed both for conditioning and/or heating environments and must be destined for this use only and
compatibly with their performance characteristics.
CARRIER accepts no responsibility, either contractual or extra-contractual, for any damage caused to persons, animals of property
as a result of incorrect installation, adjustment or maintenance or improper use.
In case of water leaks, turn the master switch of the system to “OFF” and close the water taps.
As soon as possible, call the CARRIER technical service department or else professionally qualied personnel and do not intervene
personally on the unit.
The concealed version 42SIN & 42SIL do not have a grill or covering plate. Provide safety guards and air inlet/outlet grills to prevent
accidental contact with the device.
If the unit is not used for a log period of time, the following operations should be performed:
-Turn the master switch of the system to “OFF”
-Close the water taps
-If there is the risk of freezing, make sure that anti-freeze has been added to the system otherwise empty the system.
If the room temperature is too low ot too high it is damaging for the health and is also a useless waste of energy.
Avoid prolonged contact with the direct air ow.
Do not leave the room closed for long periods. Periodically open the windows to ensure a correct change of air.
This instruction leaet is an integral part of the unit and consequently must be kept carefully and must ALWAYS accompany the
unit, even when it is passed to a new owner or user or transferred onto another system. If it is lost or damaged, please contact the
local CARRIER technical service centre.
All repair or maintenance interventions must be performed by the technical service department or by professionally qualied
personnel as foreseen in this booklet. Do not modify or intervene on the unit as this could create dangerous situations and the
manufacturer will not be responsible for any damage caused.
Danger from burns - take care when touching
1.2 - Fundamental safety rules
Remember that some fundamental safety rules should be followed when using a product that uses electricity and water, such as:
It is forbidden for the unit to be used by children or unassisted disabled persons.
It is forbidden to touch the unit with wet hands or body when barefoot.
It is forbidden to carry out any cleaning before having disconnected the unit from the electricity mains supply by turning the system
master switch to “OFF”.
It is forbidden to modify the safety or adjustment devices or adjust without authorisation and indications of the manufacturer.
It is forbidden to pull, cut or knot the electrical cables coming out of the unit, even if it is disconnected from the mains supply.
It is forbidden to poke objects or anything else through the inlet or outlet grills.
It is forbidden to open the doors which access the internal parts of the unit without rst turning the system master switch to “OFF”.
It is forbidden to dispose of or leave in the reach of children the packaging materials which could become a source of danger.
It is forbidden to climb onto the unit or rest any object on it.
The external parts of the unit can reach temperatures of more than 70°C.

5
2 - INSTALLATION
2.1 - Positioning the unit
Avoid installing the unit in proximity to:
-positions subject to exposure to direct sunlight;
-in proximity to sources of heat;
-in damp areas or places with probable contact with water;
-in places with oil fumes
-places subject to high frequencies.
Make sure that:
-the wall on which the unit is to be installed is strong enough to support the weight;
-the part of the wall interested does not have pipes or electric wires passing through;
-the interested wall is perfectly at;
-there is an area free of obstacles which could interfere with the inlet and outlet air ow;
-the installation wall is preferably an outside perimeter wall to allow the discharge of the condensation outside;
-in case of ceiling installation the airow is not directed towards persons.
2.2 - Installation modes
The following descriptions of the various mounting phase and the relative designs refer to a version of the machine with xtures on
the left.
The operations for the mounting of machines with xtures on the right are exactly the same.
Only the images are to be considered as a mirror image.
To ensure that the installation is performed correctly and that the unit will perform perfectly carefully follow the instructions indicated
in this manual. Failure to respect the rules indicated not only can cause malfunctions of the unit but will also invalidate the warranty
and hence CARRIER shall not respond for any damage to persons, animals or property.
2.3 - Minimum installation distances
Figure indicates the minimum mounting distances between the wall-mounted cooler-convector and furniture present in the room.

6
2 - INSTALLATION
2.4 - Side opening
-On the left-hand side lift the cover that protects the screw, loosen the screw that xes the left panel, then move it slightly to the
left and lift it up.
-On the opposite side, lift the cover that protects the screw and unscrew it.
-Move the side panel slightly to the right and lift it out.
C
BE
B
C
D
Bcover
Cxing screws
Dleft panel
Eright panel
2.5 - Vertical oor or wall installation
When mounting on the oor with support feet, refer to the individual instructions leaets supplied and the relative manual for the
mounting of the feet.
Using the paper template, trace the position of the two xing brackets on the wall. Use a suitable drill to make the holes with and insert
the toggle bolts (2 for each bracket); x the two brackets. Do not over-tighten the screws so that the brackets can be adjusted with a
spirit level.
Fully tighten the four screws to block the two brackets.
Check the stability by manually moving the brackets to the right and to the left, up and down.
Mount the unit, checking that it ts correctly onto the brackets and checking that it is stable.
B BC
C
Btoggle bolts
Cbrackets

7
2 - INSTALLATION
2.6 - Horizontal or ceiling installation (42SIC or 42SIN)
Using the paper template, trace on the ceiling the position of the two xing brackets and the two rear screws. Using a suitable drill,
make the holes and insert the toggle bolts (2 for each bracket); x the two brackets. Do not over-tighten the screws. Position the
machine on the two brackets, keeping it in position and then x the two screws into the rear toggle bolts, one on each side.
Make sure that there is sufcient inclination of the unit towards the drainage pipe to facilitate the water drainage.
Fully tighten all 6 xing screws.
For installation of the 42NSIC versions, horizontal condensation collection basin accessory kits are available GB0520/GB0524.
The installation of 42SIR (low height with cabinet) units in horizontal position is prohibited.
Carefully check the inclination of the exhaust pipe. Any counterslope of the discharge line can cause water leakage
B B C C
DE
Btoggle bolts
Cbrackets
Dscrews
Edrainage pipe
2.7 - Mounting front grill safety support (42SIC)
In the case in which the cooler-convector is installed in a horizontal position, to guarantee the safety of the cleaning/lter replacement
operations it is obligatory that the two clamps, in the supplied bag together with the instruction manual and the accessories, are mounted
by the installer.
Install braces to prevent the fall of the grid.
-Separate the two clamps;
-open the front grill and completely unscrew the xing screws on the springs;
-x the two clamps, blocking them by retightening the screws;
-x the other part of the clamp to the grill using the supplied screw;
-close the grill.
B
B
C
D
BTies
CScrews xing springs
Dgrid

8
2 - INSTALLATION
2.8 - Horizontal or ceiling installation (42SIC or 42SIN)
To prevent the grille from being accidentally removed or left loosened by the quick-release pads preventing the fan coil from functioning
properly (in this case, the ventilation stops and the grid safety alarm appears) 2 screws are provided for fastening the grid.
The screws are TC 4,2x9,5 mm type.
So it it takes just x the screws in dedicated holes located on grill’s xing bars.
See the gure below.
BC
D
FRONT VIEW
Btoggle bolts
Cbrackets
Dscrews
2.9 - Hydraulic connections
Sizes 29 49 69 89 99
Pipeline diameter mm 14 14 16 18 20
The choice and sizing of the hydraulic lines must be made by an expert who must operate according to the rules of good technique
and the laws in force, taking into account that undersized pipes cause a malfunction.
To make the connections:
-position the hydraulic lines
-tighten the connections using the “spanner and counter spanner” method
-check for any leaks of liquid
-coat the connections with insulating material.
The hydraulic lines and joints must be thermally insulated.
Avoid partially insulating the pipes.
Do not over-tighten to avoid damaging the insulation.
Use hemp and green paste to seal the threaded connections; the use of Teon is advised when there is anti-freeze in the hydraulic
circuit.

9
2 - INSTALLATION
2.10 - Condensation discharge
The condensation discharge network must be suitably sized (minimum inside pipe diameter 16 mm) and the pipeline positioned so
that it keeps a constant inclination, never less than 1%. In the vertical installation, the discharge pipe is connected directly to the
discharge tray, positioned at the bottom of the side shoulder underneath the hydraulic xtures. In a horizontal installation the discharge
tube is connected to the one already present on the machine.
For installation of the 42SIC versions in a horizontal position, horizontal condensation collection basin
accessory kits are available GB0520/GB0524.
-If possible, make the condensation liquid ow directly in a gutter or a “rainwater” discharge.
-When discharging directly into the main drains, it is advisable to make a siphon to prevent bad smells returning up the pipe towards
the room. The curve of the siphon must be lower than the condensation collection bowl.
-If the condensation needs to be discharged into a container, it must be open to the atmosphere and the tube must not be immerged
in water to avoid problems of adhesiveness and counter-pressure that would interfere with the normal outow.
-If there is a height difference that could interfere with the outow of the condensation, a pump must be mounted:
-in a vertical installation mount the pump under the lateral drainage tray;
-in a horizontal installation the pump position must be decided according to the specic requirements.
Such pumps are commonly found in commerce.
However, on completion of the installation it is advisable to check the correct outow of the condensation liquid by slowly pouring about
½ l of water into the collection tray in about 5-10 minutes.
Mounting the condensation discharge pipe in the vertical version
Connect to the condensation collection tray discharge union a pipe for the outow of the liquid blocking it adequately. Check that the
drip-collector extension is present and correctly installed.
C
ø14mm
B
D
Bdischarge tting
Ctube for the outow of the liquid
Dextension drip
Mounting the condensation discharge pipe in the horizontal version (42SIC, 42SIN)
To mount the horizontal bowl on the 42SIC versions refer to the instructions in kits GB0520/GB0524.
-check that the “L” pipe and the exible rubber hose are correctly connected to the bowl.
-slide in the side of the machine keeping the pipe in position up against the front grill.
-fully close the side checking that the pipe remains blocked in the special grove on the side.

10
2 - INSTALLATION
N.B. for the horizontal installation carefully note the following precautions:
-make sure that the machine is installed perfectly level or with a slight inclination towards the condensation discharge;
-insulate carefully the inow and outow pipes up to the machine union to prevent any drops of condensation outside the same
collection bowl;
-insulate the bowl condensation discharge pipe along all of its length.
B
C
ø14mm
Bconnection pipes
Cburglary
2.11 - Filling the system
When starting up the system, make sure that the hydraulic unit lockshield is open. If there is no electric power and the thermo-valve
has already been powered use the special cap to press the valve stopper to open it.
2.12 - Evacuating air while lling the system
-Open all the system interception devices (manual or automatic);
-Start the lling by slowly opening the system water lling tap;
-For the installed in a vertical position, take a screwdriver and act on the highest breather of the battery; for appliances installed
in a horizontal position, act on the highest positioned breather; for the 4-pipe versions act on the highest breathers on both
batteries.
-When water starts coming out of the breather valves of the unit, close them and continue lling until reaching the nominal value
for the system.
Check the hydraulic seal of the gaskets.
It is advisable to repeat these operations after the unit has been running for a few hours and periodically check the pressure of the
system.
BB
BVenting of the battery
2.13 - Electrical connections
Make electrical connections according to the requirements set out in sections General Warnings and Foundamental Safety Rules by
reference to the patterns present in the installation and accessories manuals.
Before doing any work, make sure the power is switched off.
The unit must be connected to the mains through a multipolar switch with minimum contact opening of at least 3mm or with a dewice
that allows the complete disconnection from the device under the overvoltage conditions category III.

11
2 - INSTALLATION
2.14 - Maintenance
Routine maintenance is indispensable to keep the 42SI fan coil in perfect working condition, safe and reliable over the years. This can
be done every six months for some interventions and annually for others, by the Technical Service Assistance, technically authorised
and prepared, using always original spare parts.
2.15 - Cleaning the outside
Before every cleaning and maintenance intervention, disconnect the unit from the mains by switching off the master switch.
Wait until the parts have cooled down to avoid the risk of burns.
Do not use abrasive sponges or abrasive or corrosive detergents to avoid damaging the painted surfaces.
When necessary, clean the outer surfaces of the Air Leaf cooler-convector with a soft cloth damp cloth.
2.16 - Cleaning air suction lter
After a period of continuous operation and in consideration of the concentration of impurities in the air, or when he intends to restart
the plant after a period of inactivity, proceed as described.
Extraction of lter cells in the versions with aspiration grill with aps
-extract the front grill by lifting it slightly and turn it until it comes right out of its seat;
-extract the lter, pulling it horizontally outwards.
BC
DE
Bfront grille
CSee grid
Dlter
Eextraction lter

12
2 - INSTALLATION
Extraction of lter cells in the versions with mobile aspiration panel
-Insert your hands under the end of mobile panel
-Press the plastic lug
-Lift and extract the mobile panel
-Extract the lter
C
B
E
D
Bap
CPlastic tabs
Dlter
Eextraction lter
Cleaning ltering seats
-suck up the powder with a vacuum cleaner
-wash the lter with running water without using detergents or solvents, and leave to dry.
-Remount the lter on the cooler-convector (g. 32 ref. A), taking care to insert the lower ap into its seat.
It is forbidden to use the unit without the net lters.
The unit is tted with a safety switch that prevents the operation of the cooler with the mobile panel missing or out of position.
After nishing the cleaning of the lter, check that the panel is mounted correctly.
BCC D
Blter
Clower edge
DThe lter housing

13
2 - INSTALLATION
Ending Cleaning Operations
-For the versions with a grill with aps, insert the two lugs into the special slots, turn it and hook it up with a slight tap on the upper
part.
B
C
Btabs
Cslots
-For the versions with a mobile panel, rest it in its position, parallel to the front panel and press until it is blocked.
2.17 - Energy saving tips
-Always keep the lters clean;
-when far possible, keep the doors and windows closed in the room being conditioned;
-limit where possible the effect of direct sun rays in the rooms being conditioned (use curtains, shutters etc.)

14
3 - TROUBLESHOOTING
3.1 - Troubleshooting
In case of water leaks or anomalous functioning immediately cut off the power supply and close the water taps.
Should one of the following anomalies occur, contact an authorised service centre or an authorised qualied person, but do not
intervene personally.
-The ventilation does not activate even if there is hot or cold water in the hydraulic circuit.
-The unit leaks water during the heating function.
-The unit leaks water only during the cooling function.
-The unit makes an excessive noise.
-There are formations of dew on the front panel.
3.2 - Table of anomalies and remedies
The interventions must be carried out by a qualied installer or by a specialised service centre.
Effect Cause Remedy
A delayed activation of the ventilation respect to
the new temperature or function settings.
The circuit valve needs some time to open and
as a result the hot or cold water takes time to
circulate in the unit.
Wait for 2 or 3 minutes to open the circuit valve.
The unit does not activate the ventilation. No hot or cold water in the system. Check that the water boiler or cooler are
functioning correctly.
The ventilation does not activate even if there is
hot or cold water in the hydraulic circuit.
The hydraulic valve remains closed.
Dismount the valve body and check if the water
circulation is restored.
Check the working efciency of the valve by
powering it separately with 230V. If it activates
the problem could be the electronic control.
The fan motor is blocked or burnt out. Check the windings of the motor and thefree
rotation of the fan.
The micro-switch that stops the ventilation when
the lter grill is opened does not close correctly.
Check that by closing the grill the micro-switch
contact is activated.
The electrical connections are not correct. Check the electrical connections.
The unit leaks water during the heating function. Leaks in the hydraulic connections of the system. Check the leak and fully tighten the
connections.
Leaks in the valve unit. Check the state of the gaskets.
There are formations of dew on the front panel. Thermal insulation unstuck.
Check the correct positioning of the thermo-
acoustic insulation paying attention to that in
the front above the nned battery.
There are drops of water on the air outlet grill.
In situations of high humidity (>60%)
condensation could form, especially at the
minimum ventilation speeds.
As soon as the humidity starts falling the
phenomenon disappears. In any case the
presence of a few drops of water in the unit
does not indicate a malfunction.
The unit leaks water only during the cooling
function.
The condensation bowl is blocked. Slowly pour a bottle of water in the low part of
the battery to check the drainage; if necessary,
clean the bowl and/or increase the inclination of
the drainage pipe.
The condensation discharge does not need an
inclination for correct drainage.
The connection pipes and the valve unit are not
insulated well. Check the insulation of the pipes.
The unit makes a strange noise.
The fan touches the structure. Check the clogging of lters and clean them if
necessary
The fan is unbalanced. The unbalancing causes excessive vibrations of
the machine; replace the fan.
Check the clogging of lters and clean them if
necessary Clean the lters

15

Order No.: 10547, 09.2019. Supersedes order No.: New. Manufactured by: Carrier SCS, Montluel, France.
Manufacturer reserves the right to change any product specications without notice. Printed in the European Union.