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JOHNSON CONTROLS
4
FORM 100.50-EG5 (108)
Features and Benefi ts
AIRFLOW CONFIGURATIONS
Variable-Air-Volume – Eco
2
units 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
must be supplied by others and installed approximately
3/4 down the longest duct run.
Constant Volume – Eco
2
units are available for single-
zone constant volume applications. Control can be used
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
confi gurable for bottom, left or right discharge. The
supply air temperature sensor is included and factory-
installed.
Staged Gas Heat – For applications requiring gas heat
for morning warm-up, or other heating needs, a staged
natural gas furnace is available. The furnace is located
in the discharge plenum, downstream of the supply fan.
The supply air temperature sensor is located across the
face of the supply duct opening in the unit. Furnaces
are designed in 375 mbh modules with one stage each.
Three are available on the YPAL050-061 with bottom
discharge and two are available on the YPAL050-061
with left-side discharge. Ignition and safety controls are
included and factory-wired.
POWER OPTIONS
Single-point supply with terminal block – This
confi guration is standard, and includes three terminals
for the incoming 3-phase power and is the standard
confi guration for the Eco
2
product. It includes the en-
closure, terminal-block, and interconnecting wiring to
the compressors, heater and furnace controls, all fans,
etc. In this confi guration, 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
isolate the unit power voltage for servicing. Others must
supply separate external fusing which must comply with
the National Electric Code and/or local codes.
Dual-point supply with terminal block – This option in-
cludes enclosure, terminal blocks circuited to the supply
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 – This options includes a powered
115V GFCI convenience outlet that can be used for
powering tools or lights for servicing. A protective 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 Eco
2
units are
equipped with a factory-installed, programmed and
commissioned unit controller with 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.
Low Ambient – This option includes low ambient control
of the fi rst 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-
frequency drive on the fi rst condenser fan of 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 Eco
2
unit. All models,
YPAL050-061, include an interface for a 7-wire ther-
mostat as standard.