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254597-YTG-B-0507
Unitary Products Group 29
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 air
dampers are positioned by a 2-position, spring-return
damper actuator. The maximum leakage rate for the out-
door air intake dampers shall not exceed 2% when
dampers are fully closed and operating against a pres-
sure differential of 0.5 IWG. A unit-mounted potentiome-
ter shall be provided to adjust the outdoor 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 positions - 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"and 8” high, full perimeter curb with
wood nailer (shipped knocked-down).
• BAROMETRIC RELIEF DAMPER - Contains a rain
hood, air inlet screen, exhaust damper and mounting
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 - Contains orifices
required for applications between 2000 and 6000 feet
altitude. Must be used with propane conversion kit.
• LOW NOX - Required to reduce the emission of nitrogen
oxides below 40 nanograms per joule.
• GAS PIPING - Contains 1/2” pipe nipples, fittings and
gas cock (including panel assess gaskets) required for
bottom gas supply connection with external shut off.
• POWER EXHAUST OPTION - To work in conjunction
with economizers.
• ELECTRIC HEATERS
• ECONOMIZER/MOTORIZED DAMPER RAIN HOOD -
Contains all hood panels and the hardware for assem-
bling.
• MANUAL OUTDOOR AIR DAMPER
• COIL GUARD KIT - Guard for cooling coil.
• HAIL GUARD
• FLUE EXHAUST EXTENSION
OTHER FACTORY INSTALLED OPTIONS
• POWER EXHAUST OPTION - To work in conjunction
with economizers.
• STAINLESS STEEL HEAT EXCHANGER
• STAINLESS STEEL DRAIN PAN
• BOTTOM DRAIN CONNECTION