York PREDATOR Magnum DJ 150 Technical Manual page 4

246695-YTG-C-0708
• Environmentally Aware – For improved Indoor Air
Quality, foil faced insulation is used exclusively through-
out the units.
• Balanced Heating – The Predator
"Ultimate Heating Comfort" with a balance between 1
nd
and 2 stage gas heating. The first stage of a gas heat
®
Predator Magnum unit provides 60% of the heating
capacity. Balanced heating allows the unit to better main-
tain desired temperatures.
• Convertible Airflow Design – The side duct openings
are covered when they leave the factory. If a side supply/
return is desired, the installer simply removes the two
side duct covers from the outside of the unit and installs
them over the down shot openings. No panel cutting is
required. Convertible airflow design allows maximum
field flexibility and minimum inventory.
• System Protection – Suction line freezestats are sup-
plied 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. Crankcase heaters are
standard on reciprocating compressors. Scroll compres-
sors do not require crankcase heaters. Phase monitors
are standard on all units.
• Advanced Controls - Simplicity™ 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 tem-
perature 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 pro-
grammable. 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 con-
trol 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
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Magnum offers
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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 com-
puter 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 Predator units are painted with a long lasting, pow-
der 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.
To further simplify planning and installation, Predator
Magnum cabinets are designed to fit your roof. With the
optional roof curb, the unit ductwork is designed to fit
around 24" on-center joists or between 48" on-center joists.
The drain pan can be rotated to drain to either the front
or the rear of the unit. Additionally, the drain pan can be
fitted to drain through the roof curb. As it is sometimes
difficult to have a level installation, the drain pan features
a generous slope to ensure proper drainage.
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 connec-
tions can be made quickly and with a minimum amount
of field labor.
All units are shipped with 2" throw-away filters installed.
Wide Range of Indoor Airflows – All indoor fan motors
are belt-drive type providing maximum flexibility to han-
dle most airflow requirements. For high static applica-
tions, factory installed alternate indoor fan motors are
available. With the optional indoor fan motor, all units can
supply nominal airflow at a minimum of 1.5" ESP.
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
and stainless steel tubular heat exchangers carry a 10-
year warranty.
Johnson Controls Unitary Products
®