3
1 - IntroductIon
The 4GM Individual Air Treatment Module (ITM) is
something more than a simple air conditioner which enables
room air temperature to be controlled. It is a total, integrated
comfort system in the building.
The Carrier 4GM is a compact central station air handler
to supply conditioned air at a rate of 15 l/s to rooms with
floor areas of approximately 5 m
. The main components
of the unit are an air filter, a fresh air supply, equipped with
an air flow controller (option), a chilled water cooling coil,
a hot water heating coil or an electric resistance heater, a
centrifugal fan. The unit is controlled by a Carrier numeric
controller.
The 4GM is connected, on site, through two flexible rec-
tangular ducts (low thermal conductivity, low noise trans-
mission supplied by others) to one or more high induction
plenums fitted with Carrier linear diffusers in the false
ceiling. Typically, these will be Carrier Moduboot 35BD/
35SR units with each one serving an individual room or
zone and providing both supply air and return air paths
according to diffuser model.
The 4GM has a Carrier numeric controller. Each room
occupant then has his or her own Zone User Interface
control module, on a wall (with a mounting base) or desk,
with which to select the preferred comfort level:
•
Room ambient temperature
•
Select Occupied or Unoccupied mode at each 4GM
to control energy usage
•
Ventilation air (the rate of air replacement)
•
Lighting on or off
•
Blinds raised or lowered and their inclination
In addition, connection to a central Building Management
System allows units to be controlled individually to satisfy
overriding criteria or to respond to local regulations.
The 4GM is designed to be installed in false ceilings. Their
high static pressure capability allows them to be used with
long ducts.
WARNING: Switch off the electrical power supply before
doing any work on the unit.
