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255040-YTG-A-0506
Unitary Products Group 41
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.
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 condenser coil.
• HAIL GUARD
• FLUE EXHAUST EXTENSION
• TECHNICOAT PHENOLIC COATED CONDENSER
COIL
• ELECTRONIC SINGLE ENTHALPY ECONOMIZER