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FACTORY OPTIONS AND/OR ACCESSORIES (cont.)
The Legacy Line 580J--04--14 rooftop coupled with the
Perfect Humidity system is capable of operating in normal
design cooling mode, subcooling mode, and hot gas reheat
mode. Normal design cooling mode is when the unit will
operate under its normal sequence of operation by cycling
compressors to maintain comfort conditions.
Subcooling mode will operate to satisfy part load type
conditions 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 dehumidification operation.
Motormaster Head Pressure Controller
The Motormaster motor controller is a low ambient, head
pressure controller kit that is designe d to maint ain the
unit’s condenser head pressure during periods of low
ambient cooling operation. This device should be used as
an alternative to economizer free cooling when
economizer usa ge is either not appropriate or desired. The
Motormaster will either cycle the outdoor fan motors or
operate them at reduced speed to maintain the unit
operat ion, depending on the model.
Winter Start Kit
The winter start kit by Bryant ext ends the low ambient
limit of your rooftop to 25_F(--4_C). The kit bypasses the
low pressure switch, preventing nuisance tripping of the
low pressure switch. Other low ambient precautions may
still be prudent.
Propane Heating
Convert your gas heat rooftop from standard natural gas
operation to propane using this field installed kit.
High Altitude Heating
High altitudes have less oxygen, which means heat
exchangers need less fuel. The new gas orifices in this
field installed kit make the necessary adjustment for high
altitude applications. They restore the optimal fuel to air
mixture and maintain healthy combustion at altitudes
above 2000 ft (610m). Kits may not be required in all
areas.
Flue Discharge Deflector
The flue discharge deflector is a useful accessory when
flue gas recirculation is a concern. By venting the flue
discharge upwards, the deflect or minimiz es the chance for
a neighboring unit to intake the flue exhaust.
Optional Stainless Steel Heat Exchanger
The stainless steel heat exchanger option provides the
tubular heat exchanger be made out of a minimum 20
gauge type 409 stainless steel for appli cations 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 airborne contaminants
require its use (applications such as paper mills) or in
area s with very high outdoor humidity that may result in
severe condensation in the hea t exchanger during cooling
operation.
Flue Discharge Heat Shield
The flue discharge heat shield keeps people from touching
the rooftop unit’s potentially hot flue disc harge. This is
especially useful for ground level applications, where
more, untrained people could have access to the unit’s
exterior.
Alternate Motors and Drives
Some applications need larger horsepower motors, some
need more airflow, and some need both. Regardless of the
case, your Bryant expert has a fac tory installed
combination to meet your applic ation. A wide selection of
motors and pulleys (drives) are avai lable, factory
installed, to handle nearly any application.
Thru--the--Base Connections
Thru--the--base connections, available as either an
accessory or as a factory option, are necessary to ensure
proper connection and seal when routing wire and pi ping
through the rooftop’s ba se pan and curb. These coupl ings
eliminate roof penetration a nd should be c onsidered for
gas lines, main power lines, as well as control power.
Disconnect Switch Bracket
Provides a pre--engineered and sized mounting bracket for
applications requiring a unit mounted fused disconnect of
greater than 100 amps. Bracket assures that no damage
will occur to coils when mounting with screws and other
fasteners.
Supply Duct Cover
This supply duct cover is required when field converting
the factory standard vertical duct supply to horizonta l duct
supply configuration. One required per unit. (16 size only)
580J