6
FACTORYOPTIONS AND/OR ACCESSORIES
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 CO2sensors, Economizers can
provide even more savingsby 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. There are also models for electromechanical as
well as direct digital controllers. Additional sensors are
available as accessories to optimize the economizers.
CO2Sensor
Improves productivity and saves money by working 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 CO2levelsdecrease, and
the sensor appropriately closes the economizer. This
intelligent control of the ventilation air , called Demand
Control Ventilation(DCV) reduces the overall load onthe
rooftop, saving money.
Smoke Detectors
Trust the experts. Smoke detectors make your application
safer and your job easier. Bryant’s smoke detectors
immediately shut down the rooftop unit when smoke is
detected. They are available, installed by the factory,for
supply air, return air, or both.
Louvered Hail Guards
Sleek, louvered panels protect the condenser coil from
hail damage, foreign objects, and incidental contact.
Convenience Outlet (poweredor un --powered)
Lower service bills by including a convenience outlet in
your specification. Bryant will install this service feature
at our factory, powered. Provides a convenient, 15 amp,
115vGFCI receptacle.
Non--fusedDisconnect
This OSHA--compliant, factory--installed, safety switch
allows a service technician to locally securepower to the
rooftop.
BarometricRelief
Gravity controlled, barometric relief equalizes building
pressure and ambient air pressures. This can be a cast
effectivesolution to prevent building pressurization.
Power Exhaustwith Barometric Relief.
Superior internal building pressure control. This
field--installed accessory may eliminate the need for
costly,e xternal pressure control fans.
RTU--MP,Multi--protocolController
Connect the rooftop to an existing BAS without needing
complicated translators or adapter modules using the
RTU--MP controller. This new controller speaks the 4
most common building automation system languages
(Bacnet, Modbus, N2, and Lonworks). Use this controller
when you have an existing BAS.
Time Guard II Control Circuit
This accessory protects your compressor by preventing
short--cyclingin the e vent of some other failure, prevents
the compressor from restarting for 30 seconds after
stopping. Not required with PC, RTU--MP, or authorized
commercial thermostats.
Filter or Fan Status Switches
Use these differential pressureswitches to detect a filter
clog or indoor fan motor failure. When used in
conjunction with a compatible unit controller/thermostat,
the switcheswill activate an alarm towarn the appropriate
personnel.
Motorized 2--PositionDamper
Bryant’s new, 2--position, motorized outdoor air damper
admits up to 100% outside air.Using reliable, gear--driven
technology, the 2--position damper opens to allow
ventilation air and closes when the rooftop stops, stopping
unwantedinfiltration.
Manual OA Damper
Manual outdoor air dampers are an economical way to
bring in ventilationair.
Motormaster Head Pressure Controller
The Motormaster motor controlleris a low ambient, head
pressure controller kit that is designed to maintain t he
unit’s condenser head pressure during periods of low
ambient cooling operation. This device should be used as
an alternative to economizer free cooling not when
economizer usage 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
operation, depending on the model.
Winter Start Kit
Bryant’s winterstart kit extends the low ambient limit of
your rooftop to 25_F(--9_C). The kit bypasses the low
pressure switch, preventing nuisance tripping of the low
pressure switch. Other low ambient precautions may still
be prudent.
UV--CLights
Bryant’s commercial rooftop ultra--violet germicidal
lamps are designed to kill odor causing mold and fungus
that may develop in thecool and damp evaporator section
of an HVAC unit. The high output, low temperature
germicidal lampsare installed in the evaporator section of
the HVACunit, andshine di rectly on the evaporator coil
558J