INDIVIDUAL COMFORT MODULES 42BJ
Features and advantages
Features
■■ Comfort
The 42BJ ICM LEC can be equipped with a numerical
Carrier NTC controller, with each room occupant having
his or her own remote user interface, on a wall or desk, to
select the preferred comfort level:
-- Ambient room temperature
-- Forced ventilation function (quick air renewal in the
office)
-- Choice of occupied or unoccupied mode at each ICM
LEC to control energy usage.
Aquasmart Evolution allows all units to be controlled
centrally to satisfy overriding criteria or to respond to
local selections. The central energy manag ement system
continu-ously controls the comfort levels to achieve
optimum energy usage without disturbing individual
comfort level selections.
If the product is supplied without a Carrier control device,
verification of EMC conformity is the responsibility of the
installer.
Air quality
■■ Indoor Air Quality (IAQ)
Carrier is committed to developing an Indoor Air Quality
(IAQ) control system that is integrated into the air conditioning units. This is a major innovation, and the beginning
of a new era in air conditioning.
It means that each individual comfort module (ICM) is
equipped with a high-tech fresh air intake and filtration
control system to effectively combat any type of pollutant.
This guarantees optimised indoor air quality in two stages,
as described below:
-- High-efficiency filtration with filter type F5 or F6
-- Modulation of the fresh air flow. In order to control the
air flow supplied to a room, Carrier air conditioners
can be equipped with a fresh air flow modulation
system.
■■ Three objectives:
-- To adjust the ventilation rate to the actual occupation
in the rooms
-- To maintain good indoor air quality in order to ensure
comfort and hygiene for the occupants.
-- To control energy consumption due to the air renewal
in the rooms and adjust it to avoid “overventilation”
of the building, and to minimise the operating costs
especially during unoccupied periods.
■■ Operating pinciples
The occupants of a room release on average 0.0045 l/s
(16,2 l/h) CO2. A CO2 sensor, placed in the return air duct of
the terminal, checks the concentration in the air conditioned
room. The measured concentration indicates the actual
occupation of the room.
The sensor sends a signal to the numerical Carrier controller
which in turn passes an action signal to the fresh air valve:
-- if the CO2 concentration is below a threshold value,
the fresh air flow is minimal or zero,
-- if it is above, the fresh air flow is increased up to the
specified maximum.
■■ Operating limits
Supply air temperature 12°C, when the unit is installed
in a room with an ambient temperature of 27°C dry bulb
and 65% relative humidity.
Supply/return
Moduboot
AIR TREATMENT
Hot/chilled water
inlet/outlet
42B
J IC
M1
CONTROLS
42B
JIC
M2
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7
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