
JOHNSON CONTROLS
4
FORM 100.50-EG5 (108)
Features and Benefits
AIRFLOW CONFIGURATIONS
Variable-Air-Volume – Eco2units are available for
single-zone variable-air-volume (VAV) applications.
Supply fans are controlled to the supply duct static
pressure setpoint, which can be reset via a BAS, or
through an analog voltage input on the unit controller
for optimized duct static pressure control. The static
pressure transducer is provided in the rooftop unit, and
5/16” or 1/4” plastic tubing and static pressure sensor
mustbe supplied byothers and installedapproximately
3/4 down the longest duct run.
Constant Volume – Eco2units are available for single-
zoneconstantvolumeapplications.Controlcanbeused
with a zone sensor, thermostat, or building automation
system.
COOLING AND HEATING CONFIGURATIONS
Cooling Only – For applications where no heat is
required, or heating is provided elsewhere within the
building HVAC system, cooling only units include an
empty discharge plenum. Supply duct connections are
configurable for bottom, left or right discharge. The
supply air temperature sensor is included and factory-
installed.
Staged Gas Heat –For applications requiringgas heat
for morning warm-up, or other heating needs, a staged
natural gas furnace is available. The furnace is located
inthe discharge plenum, downstreamof the supply fan.
Thesupplyair temperature sensor is locatedacrossthe
face of the supply duct opening in the unit. Furnaces
aredesigned in 375 mbh modules with onestage each.
Three are available on the YPAL050-061 with bottom
discharge and two are available on the YPAL050-061
withleft-side discharge. Ignitionand safety controlsare
included and factory-wired.
POWER OPTIONS
Single-point supply with terminal block – This
configuration is standard, and includes three terminals
for the incoming 3-phase power and is the standard
configuration for the Eco2product. It includes the en-
closure, terminal-block, and interconnecting wiring to
the compressors, heater and furnace controls, all fans,
etc. In this configuration, code requires that a means of
disconnect (not provided) must be installed at the site
within line-of-sight of the equipment.
Single-point supply with non-fused disconnect switch
– This option is the same the single-point with terminal
block option except it includes a unit-mounted through-
the-door manual non-fused disconnect switch with an
external, lockable handle (in compliance with Article
440-14 of N.E.C.). This option provides a means to
isolatethe unit power voltage for servicing. Othersmust
supplyseparate external fusing which mustcomply with
the National Electric Code and/or local codes.
Dual-pointsupplywithterminalblock–Thisoptionin-
cludesenclosure,terminal blocks circuited tothesupply
and exhaust fans and control transformer and a second
set of terminal blocks with interconnecting wiring to the
compressors, heat (if applicable) and condenser.
Convenience Outlet –Thisoptionsincludesapowered
115V GFCI convenience outlet that can be used for
powering tools or lights for servicing.Aprotective cover
plate is included while not in use. The outlet is located
on the bottom left hand corner of the power panel.
CONTROL FEATURES AND OPTIONS
Simplicity Elite Unit Controller – All Eco2units are
equipped with a factory-installed, programmed and
commissionedunitcontrollerwith all I/O capabilities and
control sequences. The controls include all on-board
diagnostic, safety and control features to operate the
rooftop unit. Two RS485 communication ports are in-
cluded as standard with one alarm output, a shutdown
contact, smoke ventilation contact, analog inputs for
supply air temperature and duct static pressure reset,
along with a variety of other capabilities.
Standard Ambient – YPAL050-061 models operate
down to 40°F as standard.
LowAmbient –Thisoptionincludeslowambientcontrol
of the first refrigerant circuit down to 0°F through the
use of suction and discharge pressure transducer on
circuit one, and condenser fan speed using a variable-
frequencydrive on thefirst condenser fanof circuit one.
Mechanical cooling with circuit two is locked out below
45°F (adjustable).
Flexsys bypass control option is not available with elite
controller.
SENSOR AND THERMOSTAT AND SENSOR
OPTIONS
Wall-Mount Zone Sensor – A thermistor zone sen-
sor for wall mounting. This zone sensor is for sensing
temperature only, and does not include any setpoint
adjustment features.
7-Wire Thermostat – This option is for a ship-loose
thermostat to interface with the Eco2unit. All models,
YPAL050-061, include an interface for a 7-wire ther-
mostat as standard.