York PREDATORTM MAGNUM DJ 150 Technical Manual page 27

036-21484-001-B-0103
the design CFM of outdoor air to meet the ventilation
requirements of the conditioned space during normal
operation. Whenever the indoor fan motor is energized,
the dampers open up to one of two pre-selected posi-
tions – regardless of the outdoor air enthalpy. Dampers
return to the fully closed position when the indoor fan
motor is de-energized. Dampers shall fully close on
power loss.
ADDITONAL FACTORY INSTALLED OPTIONS
ALTERNATE INDOOR BLOWER MOTOR – For applications
with high restrictions, units are available with optional indoor
blower motors that provide higher static output and/or higher
airflow.
CONVENIENCE OUTLET – Unit can be provided with an
optional 120VAC GFCI outlet with cover on the corner of the
unit housing the compressors.
DIRTY FILTER SWITCH – This kit includes a differential
pressure switch that energizes the fault light on the unit ther-
mostat, indicating that there is an abnormally high-pressure
drop across the filters.
BREAKER– A HACR breaker can be factory installed on the
gas heat unit.
DISCONNECT SWITCH- A disconnect can be factory
installed on a cooling only unit.
Unitary Products
STAINLESS STEEL HEAT EXCHANGER – For applications
in a corrosive environment, this option provides a full stain-
less steel heat exchanger assembly.
SMOKE DETECTOR – A smoke detector can be factory
mounted and wired in the supply and/or return air compart-
ments.
OTHER PRE-ENGINEERED ACCESSORIES AVAIL-
ABLE
ROOF CURB - 14" and 8" high, full perimeter knockdown
curb, with hinged design for quick assembly.
BAROMETRIC RELIEF DAMPER – (Unit mounted – Down-
flow, Ducted Mounted – Sideflow) – Contains a rain hood, air
inlet screen, exhaust damper and mounting hardware. Used
to relieve internal air pressure through the unit during econo-
mizer operation.
PROPANE CONVERSION KIT – Contains new orifices and
gas valve springs to convert from natural to L.P. gas.
–60 °F GAS HEAT KIT – Provides an electric heat kit for the
gas compartment for use in extreme low ambient conditions.
ECONOMIZER (Downflow and Sideflow)
POWER EXHAUST – (Unit mount – Downflow, Duct mount –
Sideflow)
27