Carrier Weathermaster 48HJD Series Product Data page 5

Another optional IAQ feature for
®
the Weathermaster unit is the exclu-
sive MoistureMiser dehumidification
package. This is a factory-installed
option that provides increased dehu-
midification by cooling the hot liquid
refrigerant leaving the condenser coil.
The MoistureMiser consists of a sub-
cooling coil located on the leaving-air
side of the evaporator coil. The loca-
tion of this coil in the indoor airstream
enhances the latent capacity of the
48HJ units by as much as 40%. Many
buildings suffer from humidity damage
or poor indoor air quality due to humid
conditions. The improved latent
capacity provided by the MoistureMiser
option reduces the building's humidity,
eliminating potential property damage
and making the space more
comfortable.
The MoistureMiser option makes the
48HJ units the ideal IAQ rooftop for
hot and humid regions. The operation
of the MoistureMiser package can be
controlled by a field-installed, wall-
mounted humidistat. The circuit acti-
vates only when needed (using the hu-
midistat) as opposed to some dehumid-
ification systems that operate continu-
ously. The humidistat can be set for
any humidity level between 20% and
80% relative humidity.
FRESH AIR
INLET
MOUNTING
KIT
Energy$Recycler — the IAQ solu-
tion for today's "tight" buildings.
Indoor-air quality (IAQ) generally refers
to the level of pollutants inside a build-
ing. These pollutants include cigarette
smoke, carbon dioxide exhaled by
occupants, radon gas, car exhaust,
paint fumes, and odors.
Concern over increased indoor air
pollutants has been spurred by several
issues: 1) changes in new building con-
struction methods and retrofit of older
buildings have reduced air infiltration
rates; 2) Synthetic materials release air-
borne particles, odors, and chemicals;
and 3) HVAC (heating, ventilation, and
air conditioning) systems that bring in
minimal fresh air.
In 1989, IAQ concerns caused
ASHRAE to recommend increased
ventilation for all public buildings. Sim-
ply introducing fresh air into a building,
however, is not always practical or cost
effective. Additional ventilation can
overload HVAC systems and increase
energy costs.
Carrier's 62AQ Energy$Recycler
unit solves this dilemma by providing
increased fresh air while keeping
increased costs to a minimum. In addi-
tion, the Energy$Recycler helps reduce
humidity levels, which helps to prevent
deterioration of building materials and
retards the growth of mold and mildew.
UNIT WITH ENERGY$RECYCLER
EXHAUST
AIR
FILTER
ACCESS
SUPPLY AIR
provides the best solution to retaining
the energy-conserving benefits of to-
day's tighter building construction
while improving indoor-air quality.
Serviceability
Servicing a rooftop unit has never
been easier with the factory-installed
hinged panel option. This option in-
cludes hinged access panels for filter,
compressor, evaporator-fan motor, and
control box areas. These panels pro-
vide quick and simple access to the ma-
jor components by simply unlocking
and swinging open the different pan-
els. Each hinged access panel is per-
manently attached to the rooftop unit,
eliminating the problem of access pan-
els being dropped and creating a hole
in the roof (potentially causing a water
leak). This type of damage could void
any warranty offered for a new roof.
following features to assist in servicing
the rooftop unit:
• 115-v convenience outlet to power
RETURN AIR
BAFFLE
RETURN AIR
The 62AQ Energy$Recycler unit
Optional packages also include the
up electric drills, lights, and refrig-
erant recovery machines. This
means you are no longer required to
run a separate 115-v power supply
to your 48HJ rooftops. It can now
be factory installed.
CONDENSER-FAN
DISCHARGE AIR
OUTDOOR-AIR
INLET
ROOF CURB
OUTDOOR AIRFLOW
INDOOR AIRFLOW
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