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392856-YTG-B-0708
Johnson Controls Unitary Products 7
• COIL GUARD - Customers can purchase a coil guard kit
to protect the condenser coil from damage. This is not a
hail guard kit.
• STAINLESS STEEL HEAT EXCHANGER - For applica-
tions in corrosive environments, this option provides a
full stainless steel heat exchanger assembly.
• STAINLESS STEEL DRAIN PAN - An optional rust-
proof stainless steel drain pan is available to provide
years of trouble-free operation in corrosive environ-
ments.
• BOTTOM DRAIN CONNECTION - An optional bottom
drain connection is available for inside the curb connec-
tions for applications in cold environments to reduce
freezing drain lines.
• PHASE MONITORS - Designed to prevent unit damage.
The phase monitor will shut the unit down in an out-of-
phase condition.
• DIRTY FILTER SWITCH - This kit includes a differential
pressure switch that energizes the fault light on the unit
thermostat, indicating that there is an abnormally high
pressure drop across the filters. Factory installed option
or field installed accessory.
• HINGED FILTER DOOR/“TOOLLESS” BLOWER AND
ACCESS PANELS (not hinged) - This option allows for
easy access and maintenance.
NOTE:Knobs are shipped inside the unit to prevent ship-
ping damage. These must be field installed for
tool-less operation.
• HIGH STATIC DRIVE OPTION - May include a belt,
blower pulley, motor pulley or a motor change to
enhance blower performance.
FIELD-INSTALLED ACCESSORIES
• SINGLE INPUT ELECTRONIC ENTHALPY ECONO-
MIZERS - Includes a slide-in / plug-in damper assembly
with fully modulating spring-return motor actuator capa-
ble of introducing up to 100% outdoor air with nominal
1% leakage type dampers.
The enthalpy system contains one sensor that monitors
the outdoor air and determines when the air is cool
enough and dry enough to provide free cooling.
The rainhood is painted to match the basic unit and must
be field-assembled before installing.
• MOTORIZED OUTDOOR AIR INTAKE DAMPER -
Includes a slide-in / plug-in damper assembly with a 2-
position, spring return motor actuator which opens to
some pre-set position whenever the supply air blower is
operating and will drive fully closed when the blower unit
shuts down.
The rain hood is painted to match the basic unit and
must be field assembled before installing.
• ELECTRIC HEATERS wired for single point power sup-
ply. These nickel chromium heater elements are pro-
vided with limit and automatic reset capability to prevent
operation at excessive temperatures.
• ROOF CURBS - Eight and fourteen-inch high roof curbs
provide a water-tight seal between the unit and the finished
roof. These full perimeter curbs meet the requirements of
the National Roofing Contractors Association (NRCA) and
are shipped knocked-down for field assembly.
Roof curbs are designed to fit inside the base rails of the
unit and include both a wood nailing strip and duct
hanger supports.
• HIGH ALTITUDE NATURAL GAS - Burner orifices and
pilot orifices are provided for proper furnace operation at
altitudes up to 6,000 feet.
• PROPANE - Burner orifices, pilot orifices and gas valve
parts are provided to convert a natural gas furnace to
propane.
• HIGH ALTITUDE PROPANE - Burner orifices and pilot
orifices are provided for proper furnace operation at alti-
tudes up to 6,000 feet. This accessory supplements the
basic propane conversion kit.
• LOW NOX KIT- Required to reduce the emission of
nitrogen oxides below 40 nanograms per joule.
• POWER EXHAUST - Our single input economizer
options are available with power exhaust. Whenever the
outdoor air intake dampers are opened for free cooling,
the exhaust fan will be energized to prevent the condi-
tioned space from being over-pressurized during econo-
mizer operation.
The power exhaust option can only be used on bot-
tom duct configurations.
• BAROMETRIC RELIEF DAMPER - This damper acces-
sory can be used to relieve internal building air pressure
on units with an economizer without power exhaust. This
accessory includes a rain hood, a bird screen and a fully
assembled damper. With bottom duct connections, the
damper should be mounted over the opening in the
Factory installed Smoke Detectors in the return air,
may be subjected to freezing temperatures during
“off” times due to outside air infiltration. These
smoke detectors have an operational limit of 32°F
to 131°F. Smoke detectors installed in areas that
could be outside those limitations will have to be
moved to prevent having false alarms.