Introduction; Air Quality; Carrier Quality Plus - Carrier 42BJ ULTRA Selection Manual

1 - INTRODUCTION

The compact 42BJ ULTRA known as the type 42BJ is available
in 3 sizes with a choice of 3 motor drives and is capable of air
conditioning rooms ranging from 25 m
Its main components are a three speed fan motor, a high-effi-
ciency air filter, a fresh air supply fitted with a constant fresh
air flow controller, a chilled water cooling coil and either a hot
water heating coil or a shielded electric heater.
Flexible, thermally and acoustically insulated discharge and
return ducts are installed on site, connecting the module to one
or more plenums in the false ceiling. These feed unobtrusive
linear ceiling diffusers (typically Carrier Moduboot 35BD/35SR
units) supplying the room or zone where air conditioning is
required.
The complete system comprises one or more Carrier air or
water-cooled chillers connected to one or more air handlers
supplying fresh air to the 42BJ ULTRA. These may be installed
in underfloor voids or above false ceilings, preferably in corri-
dors, where they are connected to hot and chilled water circuits
as well as the fresh air supply.
This simplifies maintenance, since these circuits are normally
installed in corridors and halls, and therefore never pass through
air conditioned spaces. Only the passive elements of the system,
that is the 35BD/35SR diffusers, are within occupied spaces.
Nowadays the noise level, or rather the lack of noise, is a deci-
ding factor in the selection of an air conditioning system. Low
noise was a key objective in the design of the 42BJ ULTRA. In
addition its available static pressure allows the unit to be instal-
led well away from the air conditioned space.
Discharge/return
Moduboot
Low noise, remoteness from the space which it serves allied
with easy maintenance are key attributes influencing the selec-
tion of an air conditioning system.
2 to 50 m 2 in area.
Hot/chilled water
inlet/outlet

1.1 - Air quality

Fresh air
All ULTRA models have a fresh air inlet with an air flow
controller for precise control of the fresh air admitted to com-
ply with local health standards. It is important to choose an air
flow controller to suit the room occupancy conditions.
In places where air conditioning is essential, such as totally
enclosed or windowless rooms, or premises with high heat
gains, the controllable fresh air supply on the ULTRA will make
a significant contribution to achieving the required air quality.
Air filtration
Cleanliness of the air supply is one of the primary concerns of
air treatment, and is the most basic and important measure of
the air quality which is essential to our health. The air we
breathe contains a wide diversity of particles, pollens and dusts,
all possible allergens, which have varying effects upon the
health of individuals.
These particles come from many sources both inside and outside
the building. Air filtration protects not only people against the
health hazards of these pollutants but also furnishings and equip-
ment against the contamination and damage they can cause.
The ULTRA is fitted with a high-performance air filter.
1.2.3 - Operating environment
The 42BJ 8.3 has been designed for internal 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:
• SO < 0,02 ppm
2
• H S < 0.02 ppm
2
• NO, NO < 1 ppm
2
• NH < 6 ppm
3
• N O < 0.25 ppm
2

1.2 - Carrier QUALITY PLUS

The Carrier QUALITY PLUS philosophy embraces the product
itself, its conception, its design and the integrity of its declared
performance (proven in rigorous laboratory tests) as well as the
manufacturing processes, materials and components used to
create the product.
Carrier has had LRQA quality certification to ISO 9001 stan-
dards ever since 1989.
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