Introduction - Carrier 42BJ ICM Installation Manual

1 - INTRODUCTION

The Carrier 42BJ ICM is a compact fan coil designed specifically
to air condition individual rooms ranging in area between 25 and
50 m 2 . There are three sizes and three possible motor drive
selections to ensure close matching of capability and required duty.
The main components of the unit are a centrifugal fan, a fresh
air inlet with adjustable air quantity, a throw-away filter, a
chilled water cooling coil and a hot water heating coil and/or
an electric resistance heater.
Flexible, thermally and acoustically insulated ducts connect
ICMs units to one or more plenums in the ceiling void which
feed unobtrusive linear ceiling diffusers (typically Carrier
Moduboot 35BD/35SR units) supplying the individual rooms
or zones.
The total air conditioning system comprises one or more
Carrier air- or water-cooled chillers and one air handler which
supplies fresh air to the Carrier 42BJ ICMs. The ICMs may be
installed above false ceilings or floor voids but away from
occupied zones, ideally in centre areas where they are easily
connected to hot water and chilled water circuits as well as to
the fresh air supply.
These circuits, normally installed in the corridors and halls,
never pass through the conditioned spaces. Only the passive
elements of the system, the 35BD/35SR diffusers and their
relatively short connecting ducts, are within the space which
they serve.
Noise levels, or precisely the absence of noise, are a critical
criterion in determining the design of an air conditioning
system and its components.
Low inherent noise was a key factor in the design of the ICM.
This and its high available static pressure, enabling it to be
installed well away from especially noise-sensitive areas, expand
its field of application to embrace study rooms, consultation
rooms and like areas where ambient noise is itself naturally very
low.
Low noise and remoteness from the space which it serves,
permitting easy servicing, are key attributes influencing the
selection of an air conditioning system.
Supply/return
Moduboot
The top of the range ICM can have a Carrier Maestro Zone
Controller with each room occupant having his or her own
Zone User Interface (ZUI), on a wall or desk, with which to
select the preferred comfort level:
• Room ambient temperature
• Lighting on or off
• Venetian blinds raised or lowered and their inclination
• Control ventilation air
• Select Occupied or Unoccupied mode at each ICM to control
energy usage.
Further, with these models, connection to a building energy
management system (BMS) allows all units to be controlled
centrally to satisfy overriding criteria or to respond to local
selections.
The central energy management system controls, continuously,
the comfort level in each zone and gives instant reaction to
system inputs to achieve optimum energy usage without
disturbing individual comfort level selections.
Hot/chilled water
inlet/outlet
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