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251933-YTG-B-0806
Unitary Products Group
5
Features and Benefits
Standard Features
•
High Efficiency
- High efficiency units reach 13.0 SEER.
Gas/electric units have electronic spark ignition and
power vented combustion with steady state efficiencies of
80%. High efficiency heat pumps reach 13 SEER and 7.7
H.S.P. F. These efficiencies exceed all legislated
minimum levels and provide low operating costs.
•
Convertible Airflow Design
- All models (including those
with an economizer) are suitable for either bottom or
horizontal duct connections. For bottom duct, remove the
sheet metal panels from the supply and return air openings
through the base of the unit. For horizontal duct, remove
the supply and return air panels on the rear of the unit.
•
System Protection
- Suction line freezestats are supplied
on all units to protect against loss of charge and coil
frosting when the economizer operates at low outdoor air
temperatures while the compressors are running. Every
unit has solid-core liquid line filter-driers and high and low-
pressure switches. Internal compressor protection is
standard on all compressors.
•
Advanced Controls
- The
Simplicity
®
Lite™ control
boards have standardized a number of features
previously available only as options or by utilizing
additional controls.
•
Low Ambient
- An integrated low-ambient control
allows all units to operate in the cooling mode down to
0
°
F outdoor ambient without additional assistance.
Optionally, the control board can be programmed to
lockout the compressors when the outdoor air
temperature is low or when free cooling is available.
•
Anti-Short Cycle Protection
- To aid compressor life,
an anti-short cycle delay is incorporated into the
standard controls. Compressor reliability is further
ensured by programmable minimum run times. For
testing, the anti-short cycle delay can be temporarily
overridden with the push of a button.
•
Fan Delays
- Fan on and fan off delays are fully
programmable. Furthermore, the heating and cooling
fan delay times are independent of one another. All units
are programmed with default values based upon their
configuration of cooling and heat.
•
Safety Monitoring
- The control board monitors the
high and low-pressure switches, the freezestats, the gas
valve, if applicable, and the temperature limit switch on
gas and electric heat units. The unit control board will
alarm on ignition failures, compressor lockouts and
repeated limit switch trips.
•
Nuisance Trip Protection and Strikes
- To prevent
nuisance trouble calls, the control board uses a “three
times, you’re out” philosophy. The high and low-
pressure switches and the freezestats must trip three
times within two hours before the unit control board will
lock out the associated compressor.
•
On Board Diagnostics
- Each alarm will energize a
trouble light on the thermostat, if so equipped, and flash
an alarm code on the control board LED. Each high and
low-pressure switch alarm as well as each freezestat
alarm has its own flash code. The control board saves the
five most recent alarms in memory, and these alarms can
be reviewed at any time. Alarms and programmed values
are retained through the loss of power.
•
Reliable
- From the beginning - All units undergo
computer automated testing before they leave the factory.
Units are tested for refrigerant charge and pressure, unit
amperage, and 100% functionality. For the long term - All
ZJ/XP Series units are painted with a long lasting, powder
paint that stands up over the life of the unit. The paint
used has been proven by a 1000 hour salt spray test.
•
Flexible Placement
- All models and configurations share
the same cabinet/footprint and thus the same roof curb.
You have the flexibility to set one curb and choose the
correct tonnage size and heating option after the internal
loads have been determined.
•
Full Perimeter Base Rails
- The permanently attached
base rails provide a solid foundation for the entire unit and
protect the unit during shipment. The rails offer forklift
access from 3 sides, and rigging holes are available so that
an overhead crane can be used to place the units on a roof.
•
Easy Installation
- Gas and electric utility knockouts are
supplied in the unit underside as well as the side of the
unit. A clearly identified location is provided to mount a
field supplied electrical disconnect switch. Utility
connections can be made quickly and with a minimum
amount of field labor.
•
Wide Range of Indoor Airflows
- All indoor fan motors
are belt-drive type providing maximum flexibility to handle
most airflow requirements.
•
Gas Heat Operation
- All single phase models with gas
heat have minimum annual fuel utilization efficiency
(AFUE) of 80%. All three phase models with gas heat
have minimum steady state efficiency of 80%. Each
section includes a durable heat exchanger with
aluminized steel or optional stainless steel tubes, a
redundant gas valve, spark ignition, power venting, an
ignition module for 100% shut-off and all of the safety
controls required to meet the latest ANSI standards.
The gas supply piping can be routed into the heating
compartment through a hole in the base pan of the unit or
through a knockout in the piping panel on the front of the
unit.
Electric Heat Operation
- All electric heat models are
wired for a single power source and include a bank of
nickel chromium elements mounted at the discharge of
the supply air blower to provide a high velocity and
uniform distribution of air across the heating elements.
Every element is fully protected against excessive
temperature by thermal limit switches.
The power supply wiring can be routed into the control
box through a threaded pipe connection (field supplied) in
the base pan of the unit or through a knockout in the
wiring panel on the side of the unit.
•
Warranty
- All models include a 1-year limited warranty
on the complete unit. Compressors and electric heater
elements each carry a 5-year warranty. Aluminized steel
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Summary of Contents for ZJ Series
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