Carrier 42BJ ULTRA User manual

INSTALLATION INSTRUCTIONS
Original document
INDIVIDUAL COMFORT MODULE FOR
VARIABLE AIR VOLUME SYSTEMS
42BJ MCI LEC Sizes : 1.9-2.9-4.9

2

CONTENTS
The illustrations in this document are for illustrative purposes only and not part of any o󰀨er for sale or contract. The manufacturer reserves the right to change the design
at any time without notice.
1 - PRECAUTIONS .............................................................................................................................................................................8
1.1 - Operating limits .........................................................................................................................................................................8
1.2 - Clearances required ..................................................................................................................................................................8
1.3 - Receiving a shipment - installation methods .............................................................................................................................8
1.4 - Supply voltage 230V ± 10% - 50 Hz..........................................................................................................................................8
2 - SAFETY CONSIDERATIONS........................................................................................................................................................9
2.1 - General......................................................................................................................................................................................9
2.2 - Protection against electrocution ................................................................................................................................................9
2.3 - General installation conditions ..................................................................................................................................................9
2.4 - Caution for the control of the 42BJ ICM LEC ............................................................................................................................9
2.5 - Regulations ...............................................................................................................................................................................9
3 - INSTALLATION OF THE UNIT....................................................................................................................................................10
3.1 - Installing the unit in the false ceiling ........................................................................................................................................10
3.2 - Installation procedure ..............................................................................................................................................................10
3.3 - Remocal procedure .................................................................................................................................................................10
4 - COMPONENTS............................................................................................................................................................................ 11
4.1 - Fan motor assembly ................................................................................................................................................................ 11
4.2 - Water coil ................................................................................................................................................................................ 11
4.3 - Duct connection spigots .......................................................................................................................................................... 11
4.4 - Optional air lter and lter access: air lter replacement......................................................................................................... 11
4.5 - Constant-volume fresh air controller .......................................................................................................................................12
4.6 - Optional water ow control valves ...........................................................................................................................................12
4.7 - Replacing the electric heater (Fig. 13) ....................................................................................................................................12
4.8 - Flexible pipe option .................................................................................................................................................................13
4.9 - Carrier numeric controller ........................................................................................................................................................13
4.10 - Adjustable feet (accessories) for installation in a false oor void ..........................................................................................13
5 - CODIFICATION............................................................................................................................................................................14
3

B
C
DEF
G
H
I
4

J
5 mm
20 mm/m
50 mm
K
2 mm/m
2 mm/m
50 mm
l/s m3/h A B
MR60 17 60 4-4 4-4
MR75 21 75 4-3 4-3
MR85 24 85 3-3 3-2
MR90 25 90 3-2 2-2
MR100 28 100 2-1 2-1
MR105 29 105 2-1 1-1
MR110 31 110 1-1 1-1
MR120 33 120 3-3 -
MR130 36 130 2-1 -
MR140 39 140 1-1 -
MR160 44 160 - -
L
M
N
O
5

P
42BJ MCI LEC 1.9 / 2.9
Out
Ø 16 61 75
75254 Ø 1/2" gas
25
15069
188 A
2-wV
In
Out
In
Out ColdHot
Ø 16 61 75
7510,54 Ø 1/2" gas
25
82,569
188 A
3-wV
In
42BJ A
1,9 151 mm
2,9 190 mm
42BJ MCI LEC 4.9
Out
Ø 16 7561
4 Ø 1/2" gas
163,5 192
22569
2-wV
In In
Out
ColdHot
Out
Ø 16 7561
4 Ø 1/2" gas
163,5 192
62,569
3-wV
In In
Out
ColdHot
6

Figure titles and legends:
B
Dimensions and clearances for maintenance
1a Filter access from above
1b Optional lter access from below
1c Optional side lter access
C
Dimensions and distance between xing centres
D
Electrical danger pictogram
E
Caution hand hazard pictogram
F
General danger pictogram
G
Lifting device for installation in a false ceiling
H / I
Levelling the unit
J
Condensate drain pipe
K
Several units connected to one condensate collector
L
Fresh air controller modication
M
Fan motor assembly removal
12a Door
12b Locking screw
12C Fan xing screw
N
Electric heater removal
O
Underoor installation
P
Coil water inlet/outlet positions, sizes 1.9 and 4.9
In Water in
Out Water out
Hot Hot water, 4-pipe version (two 1/2" gas nuts)
Cold Cold water (two 1/2" gas nuts)
2-wV Two-way valves
3-wV Three-way valves
7

1 - PRECAUTIONS
1.1 - Operating limits
1.1.1 - Cooling mode
Minimum supply air temperature 12°C when the unit is installed
where the ambient temperature is 27°C dry bulb with 65% relative
humidity.
1.1.2 - Heating mode
Max. supply air temperature = 60°C to avoid damage of the
discharge spigots. To avoid all risks of stratication, Carrier
recommends to keep the supply air temperature below 35°C.
1.1.3 - Operating environment
The 42BJ ICM LEC has been designed for indoor application in
‘urban’ conditions having a non-corrosive, dust-free and non-
marine environment.
The concentrations of the following chemicals must not be
exceeded in any event:
-SO2 < 0,02 ppm
-H2S < 0,02 ppm
-NO, NO2< 1 ppm
-NH3 < 6 ppm
-N2O < 0,25 ppm
Do not install a unit where ammable gases or products of an
acidic or alkaline character may be present. The copper/aluminium
coil or components inside the unit could su󰀨er irreparable corrosion
damage in their presence.
1.1.4 - Recommended coil water quality
At installation handover, and then periodically every year, it is
advised to analyse the water for bacteria (detection of ferro-
bacteria, H2S-producing and sulphate-reducing bacteria) and
chemicals (in order to avoid problems due to corrosion and
scaling).
The water circuit must include all the necessary elements for the
treatment of the water: lters, additives, intermediate exchangers,
purges, drains, isolating valves, etc., according to the analysis
results.
The results must be in accordance with the values shown below:
-Total hardness in mmol/l: 1 < mmol/l < 1,5
-Chloride [CL-] < 10 mg/litre
-Sulphate [SO4
2-] < 30 mg/litre
-Nitrate [NO3
-] = 0 mg/litre
-Dissolved iron: < 0,5 mg/litre
-Dissolved oxygen: 4 < [O2] < 9 mg/litre
-Carbon dioxide [CO2] < 30 mg/litre
-Resistivity: 20 Ohm·m < Resistivity < 50 Ohm·m
-pH: 6,9 < pH < 8
1.2 - Clearances required
Please refer to Fig. 1.
1.3 - Receiving a shipment - installation
methods
When receiving a shipment, check the condition of the goods and
report any damage in transit to the shipping company. Do not
unpack the units until just before they are due to be installed, and
make sure they are as close as possible to the installation site
when unpacking them. Do not place heavy articles of any sort on
them.
1.4 - Supply voltage 230V ± 10% - 50 Hz
Check that the supply voltage and frequency correspond to the
values of the unit to be installed.
WARNING: Failure to take proper account of the above advice
and unauthorised modification of the electrical connections
will render the Carrier warranty on the product null and void.
8

2 - SAFETY CONSIDERATIONS
WARNING: Switch o the main electrical power supply to the
unit and accessories (if installed) before doing any work on
the unit.
2.1 - General
Installing, commissioning and servicing of the various components
(unit, control system, hot and cold water system, air distribution
system) can be dangerous unless certain aspects of the
installation, such as the presence of mains electricity and hot or
cold water in the air conditioning equipment, are taken into account.
Only specially trained and qualied technicians and installers who
have been fully trained on the product concerned are authorised
to install, commission and service this equipment.
During servicing work, it is essential to apply all recommendations
and instructions given in service leaets, on labels or in the
instructions delivered with the equipment, and to comply with any
other relevant instructions.
Denition of the pictograms used:
-Electrical danger - Fig. 3
-Caution hand hazard - Fig. 4
-General danger - Fig. 5
Comply with all safety rules and regulations currently in force.
Wear eye protectors and work gloves. Take care when moving or
positioning equipment.
2.2 - Protection against electrocution
Only personnel qualied to perform electrical and maintenance
work may make electrical connections. In particular it is obligatory
to disconnect all power supplies to the unit and its accessories
before carrying out any work. Disconnect the main power supply
with an isolating device (not supplied by Carrier).
IMPORTANT: The components, which make up the dierent
control loops described in this manual include electronic
items. As such, they may generate or be harmed by
electromagnetic interference unless they are installed and
used in accordance with these instructions. The components
making up these control systems conform to the requirements
of electromagnetic compatibility in residential, commercial
and light industrial areas. They also comply with the low-
voltage directive.
2.3 - General installation conditions
IMPORTANT: The Carrier numeric controller, power module,
or in general units fitted with controls loops must have an
isolating device upstream (for example a double-pole circuit
breaker). If necessary, an easily operated emergency stop
device (such as a punch-button switch) must cut o the power
to all equipment. The installation must be equipped with a
device to protect against earth faults. The disconnect device
must simultaneously disconnect the two poles (phase and
neutral), and have a distance of at least 3 mm between the
contacts, in compliance with the installation instructions. The
mains power cable must have 3 conductors (blue, brown,
green/yellow) and its cross section and type must comply
with the specifications set out by the applicable EN or IEC
standard. Refer to the selection sheet or the name plate to
determine the maximum input current. These devices are not
supplied by Carrier.
In general terms the following rules must be applied:
Upstream over-voltage protection
Unit without electric heater T2A
Unit with electric heater T16A
-Units must be provided with over-voltage protection upstream
(not supplied by Carrier).
-The power disconnection device must be clearly labelled to
identify which items of equipment are connected to it.
-The wiring of the components which make up the di󰀨erent
control systems and the communication buses must be
carried out in accordance with the latest rules and regulations
by professional installers.
-The power supply cable must be doubly insulated and xed
using a cable clamp. A hole is provided for this purpose in
the plastic Carrier controller housing. The cable must be
clamped on the outer insulation.
-The control loop components must be installed in an
environment, which conforms to their index of protection (IP).
-The maximum level of pollution is normally pollutant (level
2) and installation category II.
-The low-voltage wiring (communication bus) must be kept
physically separate from the power wiring.
-In order to avoid interference with the communication links:
• Keep low-voltage wiring away from power cables and avoid
using the same cable run (a maximum of 300 mm in
common with the 230 V a.c., 30 A cable).
• Do not pass low-voltage wires through loops in the power
cables.
• Do not connect heavy inductive loads to the same electrical
supply (circuit breaker) used by the controllers, power
modules or speed controllers.
• Use the screened cable type recommended by Carrier and
make sure all cables are connected to the controllers and
power modules.
2.4 - Caution for the control of the 42BJ ICM
LEC
IMPORTANT: It is not permitted to connect several 42BJ ICM
LEC units to the same control device (wall thermostat,
electronic NTC controller, HDB controller, etc.)
2.5 - Regulations
Declaration of Conformity UE
This unit complies with the provisions of European Directives:
2006/42/EC (Machinery)
2014/30/EU (EMC)
2011/65/EU (RoHS)
Electronic Equipment Regulations 2012
2009/125/EC (Eco Design) & regulation 327/2011/UE
REGULATION (EC) No 1907/2006 (REACH)
UK Declaration of Conformity
This unit complies with the requirements of:
Supply of Machinery (Safety) Regulations 2008
Electromagnetic Compatibility Regulations 2016
The Restriction of the Use of Certain Hazardous Substances in Electrical and
Electronic Equipment Regulations 2012
The Ecodesign for Energy-Related Products and Energy Information Regulations
2019, and following amendments
UK REACH Regulations 2019
UK importer :
Toshiba Carrier UK Ltd, Porsham Close, Roborough, Plymouth, PL6 7DB
9

3 - INSTALLATION OF THE UNIT
3.1 - Installing the unit in the false ceiling
The positioning of the unit must not create an obstacle that may
lead to an unequal distribution and/or return ow of the air. The
ceiling must be sufciently even to allow a simple installation
without danger from the unit. The supporting structure must be
able to carry the unit weight and prevent deformation, breaks or
vibrations during operation.
INSTALLATION PRECAUTIONS: During the installation
process, remove all debris and construction material from
the ducts to prevent any damage to the unit.
3.2 - Installation procedure
-Position the unit close to where it is to be installed in the
ceiling void or under the oor. For installation in a false ceiling
use a hydraulic lift and a folding ladder to make the task
easier (Fig. 6).
-Underoor installation: install the adjustable rubber feet to
the unit. These feet are available as an accessory. Please
contact your local Carrier contact.
-Check that the clearances around the unit are sufcient to
allow easy maintenance. Please refer to the diagram that
shows the service clearances.
-Mark the position of the threaded hangers on the ceiling. If
several units need to be installed, it may be advisable to
produce a drilling template (see Fig. 2). The method of xing
the threaded hangers (not supplied by Carrier) depends on
the ceiling type (maximum diameter of the threaded hangers
is 8 mm). Once the threaded hangers are xed to the ceiling,
tighten the rst nuts.
WARNING: When moving the units, do not use water pipes,
condensate drain pan, valves or flexible pipes to lift them.
Lift the unit and align it on the threaded hangers, insert the second
nuts and tighten them slightly.
NOTE: At this point do not tighten the nuts fully and do not
clamp the unit up to the ceiling (leave a space between the
ceiling and the unit). The nuts will be adjusted finally, when
the unit has been connected to the pipework and ducts and
levelled.
Level the unit (Figs. 7 and 8)
Adjust the hanger nuts so that the unit is inclined 0.5% towards
the condensate drain pan. In the other direction (air ow direction)
the unit must be perfectly level (Fig. 8).
Condensate drain pipe (Fig. 9): Use a exible pipe with an inside
diameter of 16 mm and provide a constant fall of 20 mm/m over
the whole horizontal pipe run. Install a 50 mm (minimum) siphon
to prevent gases and odours from owing back into the ceiling
void.
If several units are connected to a common collector, a device
must be installed (Fig. 10). Before operating the unit, ensure that
the water ows into the internal condensate drain pan by pouring
some water into it. If problems are detected, check the drain pipe
slope and look for possible obstructions. In all cases the connection
duct(s) at the unit outlet must be insulated to prevent any
condensate formation on the walls.
NOTE: The pressure losses of these ducts must be compatible
with the unit performance. The duct must be as smooth as
possible. Avoid sharp bends. Check that there are no leaks
or kinks, and that there is no dirt or installation debris inside
the ducts. Debris within the ducts might damage the fan wheel
and the damper in the air di󰀨users.
When installation is complete - i.e. when the 42BJ is attached to
the ceiling, air ducts are complete, water manifolds are in position
with stop valves ready on the connection stubs, and electrical
installation is prepared - then connect the water pipes (Carrier
recommends the use of exible water pipes that can be supplied
as an accessory). Each exible pipe has a 1/2” gas screw
connector, depending on the model. Ensure that a gasket (not
supplied by Carrier) is installed between the screw connector and
the stop valve.
When all units are installed, open the stop valves on the manifolds,
bleed and then pressurize the circuits. To bleed the coils, remove
the plastic plugs on the coil access door and then slightly undo
the bleed screws with a screwdriver. Close the valve rmly when
all air has escaped.
NOTE: Do not switch on the power until all connections are
made and earthed.
3.3 - Remocal procedure
Switch o󰀨 the unit power supply at the isolator provided for
the purpose during installation (isolator not supplied by
Carrier).
-Disconnect the power supply and connection cables.
-Close the isolating valves on the manifolds.
-Disconnect the exible water pipes by unscrewing the gas
connectors.
WARNING: Since the flexible water pipes do not have drain
valves, a receiver must be provided to allow the cooling coil
to be drained.
-Disconnect the supply and return air ducts.
-Disconnect the exible condensate drain pipe. Drain the
siphon into a suitable vessel.
-Support the unit lightly and release it by unscrewing the four
nuts on the threaded hangers. Lower the unit carefully.
10

4 - COMPONENTS
4.1 - Fan motor assembly
4.1.1 - Description
The ICM has a double inlet high static pressure fan motor
assembly.
The low energy consumption motor uses a 230 V ± 10%, 50 Hz
single-phase power supply and runs at variable speed under the
control of a Carrier numeric controller supplying 0-10 V control
signal.
4.1.2 - Fan motor assembly removal procedure
WARNING: Disconnect the power supply to the unit before
carrying out any work on the unit.
If the fan develops a fault the whole assembly must be removed
and replaced.
-Remove the fan access panel (12a).
-Disconnect the fan motor assembly power supply cables
equipped with quick connectors (power and control wiring).
-Disconnect the electric heater supply cable from the 42BJ.
The cable has three wires terminating in at spade
connectors.
-The fan motor and its support are held in place by one screw
(12b) and three lugs. Remove this screw and slide the
assembly free of the lugs.
-Remove the fan from its support panel (4 screws - 12c).
-Replace the fan motor assembly and follow the procedure in
reverse order.
WARNING: To reconnect the motor cables separate the power
wiring cable from the control wiring cable and pull them apart
as far as possible.
4.2 - Water coil
4.2.1 - Coil removal procedure
WARNING: Disconnect the power supply to the unit before
carrying out any work on the unit.
-Close the isolating valves on the manifolds.
-Unscrew the union nuts to disconnect the exible water pipes.
-Remove the valve actuators taking care to identify the cooling
and heating valves.
-Disconnect the exible condensate drain pipe which is held
in place by a collar (the collar is not supplied by Carrier).
-Remove the two-way or three-way water ow control valve
bodies. Depending how the 42BJ ICM LEC is congured, the
three-way valve coupling may be tted with a heating/cooling
changeover switch, if so do not remove it.
-Remove the 4 torx screws (T20) and slide out the coil and
drain pan assembly.
-Replacement is by the reversal of the procedure des-cribed
above. Ensure that all gaskets are changed (new gaskets
tted) and that the inlet and outlet connections to the coil are
made correctly using an appropriate sealing compound
applied to the valve body.
-Bleed all air from the coil during relling.
ATTENTION: It is advisable to tighten the valve body to the
coils with caution (15 N·m is sufficient) to ensure they are not
damaged.
4.2.2 - Coil inlet/outlet positions (Fig. 15)
Water inlets/outlets, sizes 1.9/2.9.
Water inlets/outlets, size 4.9.
ATTENTION: Carefully observe the direction indicated by the
arrow on the valves, based on the connection side and the
valve type.
4.3 - Duct connection spigots
These are manufactured from high density plastic with a VO re
rating. They are encased inside the unit. The ducts should be xed
to these spigots using circular collars or adhesive. Screws and
rivets should not be used.
WARNING: In order to guarantee good air tightness, the duct
should overlap the whole of the spigot.
Make sure that the maximum supply air temperature does not
exceed 60°C.
Do not lift or support the unit using the spigots, place loads on the
spigots or damage the spigots during installation or operation.
4.4 - Optional air filter and filter access: air
filter replacement
Air lters should be changed regularly. How often this is needed
depends on the cleanliness of the working environment and the
rate at which the lter becomes clogged.
If clogged lters are not changed they can increase the pressure
drop, trapped dust particles may be given o󰀨 and entrained in the
air supply, and the general performance of the ICM may be
degraded as the air ow reduces.
NOTE: The condensate drain pan is located at the suction
end of the fan, and could therefore overflow if the air filter
became clogged. This is because the partial vacuum inside
the unit could stop the condensate from draining normally.
Access from the side (Fig. 1c)
To access the lter, open the latch, open the hinged access door
and remove the lter from its housing by releasing the two clips
which hold it in place.
When replacing the lter, make sure that the sealing gasket is
against the internal metal housing.
Access from above or below (Figs. 1a and 1b)
In these situations the lter is installed in a removable plug-in unit.
To replace the lter assembly, disengage the two latches and
withdraw the plug-in unit. Remove the old lter and insert a new
one ensuring that the sealing gasket is against the internal metal
housing.
NOTE: When installing an ICM in a ceiling void, check that
no T-bars will obstruct access to the filter or prevent the plug-
in unit from being withdrawn.
11

4.5 - Constant-volume fresh air controller
4.5.1 - Constant-volume fresh air controller
The 42BJ ICM can be tted with a constant fresh air ow controller
allowing the introduction of fresh air and the air change rate to be
controlled.
The following range of fresh air controllers is available:
Option a: 8.3 l/s (30 m3/h) (-10%; +20%)
Option b: 16.6-44.4 l/s (60-160 m3/h) (-10%; +20%)
Options a and b: the diameter of the spigot housing the fresh air
ow controller is 125 mm.
The 16.6 1/s (60 m3/h) fresh air controller may be modied on site
by relocating or removing two plastic restrictors in order to increase
the maximum constant fresh air ow capacity to 44.4 1/s (160
m3/h). A label on the 42BJ ICM shows how to adjust the two plastic
restrictors (Fig. 11).
Modication procedure
-Disconnect the fresh air duct from the spigot on the unit.
-Remove or reposition the two plastic restrictors, following the
fresh air ow controller.
-Reconnect the fresh air duct to the spigot.
IMPORTANT: If the 42BJ ICM is fitted with a return air
temperature sensor, the constant fresh air flow rate must not
exceed 50% of the supply air flow delivered by the unit at
minimum speed.
NOTE: To operate correctly, the 8.3 l/s (30 m3/h) constant fresh
air flow controller requires a di󰀨erential pressure in the range
50 Pa to 200 Pa. The 16.6 l/s (60 m3/h) constant fresh air
controller requires a di󰀨erential pressure in the range 70 to
200 Pa.
4.5.2 - Fresh air controller with variable air volume
The 42BJ ICM can be equipped with an optional variable fresh air
ow controller from 0 to 55 l/s (0 to 200 m3/h).
This is connected to the numeric Carrier controller and can regulate
the fresh air intake in two ways:
-either using a xed rate set by the installer that can be
recongured as required
-or based on the CO2 level; in this case it is connected to a
CO2 sensor via the Carrier numeric controller.
NOTE: With the variable fresh air flow controller the upstream
pressure in the fresh air duct must be 180 Pa.
4.6 - Optional water flow control valves
These valves are two-way or three-way type, with a body designed
to withstand a 16 bar operating pressure.
4.6.1 - Thermoelectric actuator (on/o󰀨)
The actuator is a 230 V a.c. on/o󰀨 type.
NOTE: The thermoelectric actuator is supplied in the normally
closed position for both the two- and the three-way valve (way
A-AB closed for a three-way valve).
To enable the installation to be lled with water, the water circuits
to be equalised and the units to be purged, the actuators must be
connected to the power supply to open the valves via a command
from the wall thermostats or from the BMS.
4.6.2 - Actuator replacement procedure
The actuators on both the chilled water and the hot water valves
may be replaced if either develops a fault.
-Disconnect the power supply to the unit before carrying out
any work on a unit.
-Disconnect the actuator power supply cable equipped with
a quick connector.
-Uncouple the faulty actuator. Retting is by the reversal of
the procedure described above.
WARNING: Ensure that the actuator is firmly screwed to the
valve body (maximum torque 15 N·m).
4.6.3 - Valve body replacement procedure
-Disconnect the power supply before carrying out any work
on a unit.
-Close the isolating valves on the manifolds.
-Unscrew the union nuts to disconnect the exible water pipes.
-Remove the valve actuators taking care to identify the cooling
and heating valves.
-Remove the two-way or three-way water ow control valve
bodies. Depending how the unit is congured, the three-way
valve coupling may be tted with a heating/cooling
changeover switch, if so do not remove it.
-Fit the new valve body to the coil (t new gaskets).
-Ret the valve actuators taking care to ensure that they are
correctly xed to the valve body.
-Reconnect the exible water pipes by tightening the union
nuts. Retighten all the water connections and ensure that all
gaskets have been changed and correctly tted (maximum
torque 15 N·m).
-Open the isolating valves on the manifolds and purge all air
from the system.
-Check that there are no leaks and reconnect the power to
the unit.
WARNING: When replacing a valve always ensure that the
direction of flow through the valve is as shown by the arrow
on the valve body. If the direction of flow is wrong, the valve
body will deteriorate rapidly.
4.7 - Replacing the electric heater (Fig. 13)
CAUTION: It is vital to disconnect the ICM from the general
power supply before carrying out any work on the electric
heater.
If the electric heater develops a fault, the assembly must be
removed and replaced; the fan unit will have to be removed to
make this possible.
a) Refer to the fan removal procedure.
b) Remove the support assembly and the electric heater by
removing the two screws.
c) Disconnect the electric heater cable (3 wires terminating in at
spade connectors).
d) Release the heater mounting and remove the heater.
e) Replace the defective heater.
f) Use the above procedure in reverse to install the new heater
and to reinstall the fan motor assembly.
WARNING
-Do not touch the heater elements when the heater is
switched on.
-Do not touch the fan wheel during the removal and re-
assembly process.
4 - COMPONENTS
12

4.8 - Flexible pipe option
Ensure that the following minimum bending radius is observed:
-insulated pipes: 106 mm
The exible water pipes are designed to carry treated water
(maximum 40% concentration of ethylene glycol or propylene
glycol).
-Maximum operating temperature, heating: 90°C.
-Operating pressure: 16 bar
4.9 - Carrier numeric controller
For further information, please refer to the selection manual,
installation manual or start-up manual for the Carrier numeric
controller.
4.10 - Adjustable feet (accessories) for
installation in a false floor void
4.10.1 - Introduction
An ICM may be installed in a oor void. Adjustable feet with built-
in vibration absorbers are available as accessories for installation
on site. For further information please contact your local Carrier
representative.
4.10.2 - Procedure for fitting (see Figs. 14 and 15)
a) Install angle bracket 1 using the screws supplied.
There are two possible height settings with di󰀨erent adjustment
ranges:
• high setting: adjustment range 45 to 50 mm,
• low setting: adjustment range 30 to 35 mm.
b) Screw foot 2 in or out according to the height needed.
4 - COMPONENTS
13

5 - CODIFICATION
Product type* Size
Modification code (1) Coils Supply and return air plenum* valves Valve motors Control Sensors Filter and access Fresh air Motor wiring (1)
Product reference 4 2 B J 1 9 E A T A A A A A A W
Digit
12345678 9 10 11 12 13 14 15 16
(1) Fixed values
Digits 5/6
1 9
2 9
39
Digit 8
A2 pipes right
B 2 pipes left
C4 pipes right
D4 pipes left
E2 pipes/2 wires right, low
pressure (PTC 2 wired stages)
F2 pipes/2 wires left, low
pressure (PTC 2 wired stages)
G2 pipes/2 wires right, high
pressure (PTC 5 wired stages)
H2 pipes/2 wires left, high
pressure (PTC 5 wired stages)
J2 pipes/2 wires right, high
pressure (PTC 4 wired stages)
K2 pipes/2 wires left, high
pressure (PTC 4 wired stages)
Digit 14
FF5 access from below
G F5 side access
H F5 access from above
KF6 access from below
LF6 side access
MF6 access from above
SActivated carbon lters +
UVPCO (access from below)
TActivated carbon lters +
UVPCO (side access)
UActivated carbon lters +
UVPCO (access from above)
Digit 15
-None
A
125 mm Ø
fresh air spigot
only
B8,3 l/s (30 m3/h)
C16,6-44,4 l/s
(21/28/36)
E
Motorised fresh
air valve
adapter Ø 125
mm
XSPECIAL
Digit 10
-None
C2-way valve
D3-way valve
J2-way valve +
exible piping
K3-way valve +
exible piping
Digit 12
-None
A NTC
DNTC + IAQ board
KNTC + fuse holder
LNTC + IAQ board + fuse holder
Digit 13
-None
A Return air sensor
B Supply air sensor
CChange-over sensor
DA + B
EA + B + C
FA + C
G B + C
HCO2sensor
J A + CO2
KB + CO2
LC + CO2
MA + B + CO2
NA + C + CO2
P B + C + CO2
Q A + B + C + CO2
Digit 11
0None
A230 V on/o󰀨
C3 points 230 V
14

15

Order No.: 14281, 07.2021 - replaces No.: 14281, 11.2011
The manufacturer reserves the right to modify the product specications without prior notice.
Manufacturer: Carrier S.C.S Rte de Thil - 01120 Montluel - France.
Printed in the European Union.