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Mechanical Specifications
General
All units shall be factory assembled, piped,
internally wired and fully charged with
refrigerant. All units shall be designed to
operate at outdoor ambient temperatures
as high as 115°F. Cooling capacities shall
be rated in accordance with A.R.I.
standards. The 4YCY4 heating/cooling unit
design is UL listed, specifically for outdoor
applications using natural gas or propane.
All units shall be designed for outdoor
rooftop or ground level installation. Unit
casing is constructed of heavy gauge,
galvanized steel and painted with a
weather-resistant powder paint.
Shipped for horizontal application,
convertible to downflow.
Casings
All panels shall be heavy gauge steel,
gasketed and insulated. Foil-faced
insulation shall be in the heat exchanger
section. Foil-faced insulation shall be in the
evaporator section. Base pan shall be
heavy gauge steel. WEATHERGUARD™
exterior corrosion resistant screws shall be
used for added resistance to rust and
corrosion.
Controls
Refrigeration cycle controls shall include
condenser fan, evaporator fan and
compressor contactors. Compressors shall
be equipped with a combination internal
winding thermostat/current overload.
Internal high pressure relief shall also be
provided.
Refrigeration System
Compressors —
The Climatuff
®
compressor features
internal over temperature and pressure
protector, total dipped hermetic motor.
Other features include: roto lock suction
and discharge refrigeration connections,
centrifugal oil pump, and low vibration and
noise.
Evaporator Coil — Internally enhanced
3/8-inch OD seamless copper tubing
mechanically bonded to aluminum fins,
factory pressure and leak tested at 250 to
300 psig. All units have TXV to control
refrigeration flow.
Condenser Coil —
The Spine Fin™ condenser coil shall be
continuously wrapped, corrosion resistant
all aluminum with minimum brazed joints.
This coil is 3/8 inch OD seamless alumi-
num tubing glued to a continuous alumi-
num fin. Coils are lab tested to withstand
2,000 pounds of pressure per square inch.
The outdoor coil provides low airflow
resistance and efficient heat transfer. The
coil is protected on all four sides by
louvered panels.
Indoor Air Fan — Direct-drive, forward-
curved, centrifugal wheel in a Composite
Vortica
®
Blower housing. Motor shall
have thermal overload protection.
Permanently lubricated motor bearings.
Motor/blower assembly isolated from unit
with rubber mounts.
Condenser Fan — Direct-drive, draw
through propeller type. Weather-proofed
permanent split capacitor fan motor shall
have built-in thermal overload and
permanently lubricated motor bearings.
Low Ambient — Standard refrigerant
system operation down to 55°F. Low
ambient accessory required for operation
to 0°F ambient condition.
Gas-Fired Heating System — Models
shall provide completely assembled, wired
and piped gas fired heating systems within
unit. Design certified by UL, specifically for
outdoor application. Threaded gas
connection on the unit.
Electronic Ignition System — Main
burner is lit each time thermostat calls for
gas heat. Flame sensor proves flame and
keeps the main burners on. Should a loss
of flame occur, the main valve closes and
the spark recurs within 0.8 second. When
thermostat is satisfied, main burner is
extinguished.
Forced Combustion Blower — Insures
flame stability under varying wind
conditions. Gives higher combustion
efficiency and location flexibility.
Heat Exchanger — stainless steel
tubes. Free floating design.
Burners — stainless steel. Multi-
port inshot.
Accessories
(U.S. Domestic Models)
Roof Curb — The roof curb shall
be designed to mate with the unit
and provide support and complete
weather-tight installation when
properly installed. Curb shall ship
knocked down for field assembly,
and include wood nailer strips.
Modulating Economizer — This
accessory shall be field installed
and be composed of the following
items: 0-100% fresh air damper,
damper drive motor fixed dry bulb
enthalpy control, and low voltage
polarized plug for electrical
connections. Solid state enthalpy or
differential enthalpy control is
optional. Economizer operations
shall be controlled by the preset
position of the enthalpy control. A
barometic relief damper shall be
standard with the economizer and
provide a pressure operated
damper that shall be gravity closing
and prohibit entrance of outside air
on equipment “off” cycle.
Manual Fresh Air Hood
Manual outside air provides a fixed
outside air quantity from 0 to 25
percent. Includes hood and
birdscreen.
Low Ambient Control
Control allows cycling of
compressor under low ambient
cooling conditions. Required for
cooling operation to 0°F.
Propane Gas
Conversion Kit — For conversion
from natural gas to LP gas.
Trane
6200 Troup Highway
Tyler, TX 75707-9010
The manufacturer has a policy of continuous product and product data improvement and it reserves the right to
change design and specifications without notice.