York 48 Standard Limited Warranties, Other Pre-Engineeredaccessories Available, Electric Heaters

255040-YTG-A-0506

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

Unitary Products Group 41