
15
Factory-installed options
Economizer (dry-bulb or enthalpy)
Economizers save money. They bring in fresh, outside air for
ventilation; and provide cool, outside air to cool your building.
This is the preferred method of low-ambient cooling. When
coupled to CO2 sensors, economizers can provide even more
savings by coupling the ventilation air to only that amount
required.
Economizers are available, installed and tested by the factory,
with either enthalpy or dry-bulb temperature inputs. Additional
sensors are available as accessories to optimize the economiz-
ers. Economizers include a powered exhaust system to help
equalize building pressures.
Economizers include gravity controlled barometric relief that
helps equalize building pressure and ambient air pressures.
This can be a cost effective solution to prevent building pres-
surization. Economizers are available in Ultra Low Leak and
standard low leak versions. Economizers can be factory-
installed or easily field-installed.
Unit mounted CO2sensor
The CO2sensor works with the economizer to intake only the
correct amount of outside air for ventilation. As occupants fill
your building, the CO2sensor detects their presence through
increasing CO2levels, and opens the economizer appropriately.
When the occupants leave, the CO2levels decrease, and the
sensor appropriately closes the economizer. This intelligent
control of the ventilation air, called demand controlled ventila-
tion (DCV), reduces the overall load on the rooftop, saving
money. It is also available as a field-installed accessory.
Smoke detector (supply and/or return air)
Trust the experts. Smoke detectors make your application safer
and your job easier. Bryant smoke detectors immediately shut
down the rooftop unit when smoke is detected. They are avail-
able, installed by the factory, for supply air, return air, or both.
Optional Perfect Humidity™ dehumidification system
Bryant’s Perfect Humidity dehumidification system is an all-
inclusive factory-installed option that can be ordered with any
Legacy™ Line 582/559K04-07 rooftop unit, with the excep-
tion of single phase voltage (208-230/1/60) units.
This system expands the envelope of operation of Bryant’s
Legacy Line rooftop products to provide unprecedented flexi-
bility to meet year round comfort conditions.
The Perfect Humidity dehumidification system has a unique
dual operational mode setting. The Perfect Humidity system
provides greater dehumidification of the occupied space by two
modes of dehumidification operations in addition to its normal
design cooling mode.
The Legacy Line 582/559K04-07 rooftop, coupled with the
Perfect Humidity system, is capable of operating in normal
design cooling mode, sub-cooling mode, and hot gas reheat
mode. Normal design cooling mode is when the unit will oper-
ate under its normal sequence of operation by cycling compres-
sors to maintain comfort conditions.
Sub-cooling mode will operate to satisfy part load type condi-
tions when the space requires combined sensible and a higher
proportion of latent load control. Hot Gas Reheat mode will
operate when outdoor temperatures diminish and the need for
latent capacity is required for sole humidity control Hot Gas
Reheat mode will provide neutral air for maximum dehumidifi-
cation operation.
NOTE: Perfect Humidity system includes Low Ambient
controller.
Thru-the-base connections
Thru-the-base connections, available as a factory option, are
necessary to ensure proper connection and seal when routing
wire and piping through the rooftop’s basepan and curb. These
couplings eliminate roof penetration and should be considered
for gas lines, main power lines, as well as control power.
Hinged access panels
Allows access to unit’s major components with specifically
designed hinged access panels. Panels are filter, control box
access indoor fan motor access.
Cu/Cu (indoor) coils
Copper fins and copper tubes are mechanically bonded to cop-
per tubes and copper tube sheets. A polymer strip prevents coil
assembly from contacting the sheet metal coil pan to minimize
potential for galvanic corrosion between coil and pan.
E-coated (outdoor and indoor) coils
A flexible epoxy polymer coating uniformly applied to all coil
surface areas without material bridging between fins. Coating
process shall ensure complete coil encapsulation of tubes, fins
and headers.
Pre-coated outdoor coils
A durable epoxy-phenolic coating to provide protection in
mildly corrosive coastal environments. The coating minimizes
galvanic action between dissimilar metals. Coating is applied
to the aluminum fin stock prior to the fin stamping process to
create an inert barrier between the aluminum fin and copper
tube.
Condenser coil hail guard
Sleek, louvered panels protect the condenser coil from hail
damage, foreign objects, and incidental contact.
Single enthalpy sensor
Prevents the wheel from rotating if the outside air conditions
are acceptable for free cooling. Both exhaust and supply blow-
ers will remain on.
Stainless steel heat exchanger (582K units only)
The stainless steel heat exchanger option provides the tubular
heat exchanger be made out of a minimum 20 gage type 409
stainless steel for applications where the mixed air to the heat
exchanger is expected to drop below 45°F (7°C). Stainless steel
may be specified on applications where the presence of air-
borne contaminants require its use (applications such as paper
mills) or in area with very high outdoor humidity that may
result in severe condensation in the heat exchanger during cool-
ing operation.
Convenience outlet (powered or un-powered)
Reduce service and/or installation costs by including a conve-
nience outlet in your specification. Bryant will install this ser-
vice feature at our factory. Provides a convenient, 15 amp, 115v
GFCI receptacle with “Wet in Use” cover. The “powered”
option allows the installer to power the outlet from the line side
Options and accessories (cont)