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036-21410-001-A-0502
52 Unitary Products Group
UNIT OPERATING CHARACTERISTICS
Unit shall be capable of starting and running at 125° F
outdoor temperature, exceeding maximum load criteria of
ARI Standard 210/240. The compressor, with standard
controls, shall be capable of operation down to 25° F outdoor
temperature. Accessory low ambient kit shall be available for
operation to 0° F. Unit shall be provided with fan time delay to
prevent cold air delivery before heat exchanger warms up
(Gas heat only).
ELECTRICAL REQUIREMENTS
All unit power wiring shall enter unit cabinet at a single factory
provided location and be capable of side or bottom entry, to
minimize roof penetrations and avoid unit field modifications.
Separate side and bottom openings shall be provided for the
control wiring.
STANDARD LIMITED WARRANTIES
• Compressor 5 Years
• Heat Exchanger 10 Years
• Electric Heat Element 5 Years
• Other Parts 1 Year
OPTIONAL OUTDOOR AIR (Shall be made available by
either/or):
• ELECTRONIC ENTHALPY AUTOMATIC ECONO-
MIZER - Outdoor and return air dampers that are inter-
locked and positioned by a fully-modulating, spring-
return damper actuator. The maximum leakage rate for
the outdoor air intake dampers shall not exceed 2%
when dampers are fully closed and operating against a
pressure differential of 0.5 IWG. A unit-mounted potenti-
ometer shall be provided to adjust the outdoor and return
air damper assembly to take in CFM of outdoor air to
meet the minimum ventilation requirement of the condi-
tioned space during normal operation. During econo-
mizer operation, a mixed-air temperature control shall
modulate the outdoor and return air damper assembly to
prevent the supply air temperature from dropping below
55°F. Changeover from compressor to economizer oper-
ation shall be provided by an integral electronic enthalpy
control that feeds input into the basic module. The out-
door intake opening shall be covered with a rain hood
that matches the exterior of the unit. Water eliminator/fil-
ters shall be provided. Simultaneous economizer/com-
pressor operation is also possible. Dampers shall fully
close on power loss.
• MOTORIZED OUTDOOR AIR DAMPERS - Outdoor and
return air dampers that are interlocked and positioned by
a 2-position, spring-return damper actuator. The maxi-
mum leakage rate for the outdoor air intake dampers
shall not exceed 2% when dampers are fully closed and
operating against a pressure differential of 0.5 IWG. A
unit-mounted potentiometer shall be provided to adjust
the outdoor and return air damper assembly to take in
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.
OTHER PRE-ENGINEERED ACCESSORIES AVAILABLE
• ROOF CURB - 14" high, full perimeter curb with wood
nailer (shipped knocked-down).
• 100% BAROMETRIC RELIEF DAMPER -Containsa
rain hood, air inlet screen, exhaust damper and mount-
ing hardware. Used to relieve internal air pressure
through the unit.
• PROPANE CONVERSION KIT - Contains new orifices
and gas valve parts to convert from natural to L.P. gas.
One per unit required.
• HIGH ALTITUDE - NATURAL GAS - Contains orifices
required for applications between 2000 and 6000 feet
altitude.
• HIGH ALTITUDE - PROPANE GAS -Containsorifices
required for applications between 2000 and 6000 feet
altitude. Must be used with propane conversion kit.
• BURGLAR BARS - Designed to work with above roof
curbs, depending on unit model. Fits duct openings of
curb supply and return air openings.
• SIDE DUCT FLANGE - Supply and return air duct
flanges for side duct applications. Do not use on units
with power exhaust.
• HIGH SPEED DRIVE - Includes blower pulley and belt
for higher CFM and/or static pressure requirements.
• WOOD SKID - Allows unit to be handled with 90" forks.
• ECONOMIZER/MOTORIZED DAMPER RAIN HOOD
(DJN/E/C300 only) - Contains all hood panels and the
hardware for assembling.
• ANTI-RECYCLE TIMER - Assures 5-minute off time
between compressor cycles.
• LOW AMBIENT KIT - Provides unit cooling operation
down to 0°F.
• COIL GUARD KIT - Guard for cooling coil.
OTHER FACTORY INSTALLED OPTIONS
• POWER EXHAUST OPTION - To work in conjunction
with economizers.
• STAINLESS STEEL HEAT EXCHANGER