York DM072, DM 060, DM 048 HIGH ALTITUDE - PROPANE GAS - Contains orifices, 036-21502-002-A-0303

OPTIONAL OUTDOOR AIR (Shall be made available by	• HIGH ALTITUDE - PROPANE GAS - Contains orifices
either/or):	required for applications between 2000 and 6000 feet
• ELECTRONIC ENTHALPY AUTOMATIC ECONO-	altitude. Must be used with propane conversion kit.

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.

•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

•TECHNICOAT PHENOLIC COATED CONDENSER AND EVAPORATOR COIL

•ELECTRONIC SINGLE ENTHALPY ECONOMIZER

•DIRTY FILTER SWITCH

•PHASE MONITOR

•COIL GUARD

•POWERED GFI CONVENIENCE OUTLET

•NON-POWERED GFI CONVENIENCE OUTLET

•BAS CONTROLS (CPC, JOHNSON, HONEYWELL, NOVAR)

•BAS READY ECONOMIZER (BELIMO ACTUATOR WITHOUT A CONTROLLER)

•HINGED FILTER DOOR ACCESS AND TOOLESS ACCESS PANELS

•2" PLEATED FILTERS

•DISCONNECT SWITCH

•SUPPLY AIR SMOKE DETECTOR

•RETURN AIR SMOKE DETECTOR

Subject to change without notice. Printed in U.S.A.		036-21502-002-A-0303
Copyright © by Unitary Products 2003. All rights reserved.		Supersedes: 036-21502-001-A-0103
Unitary	5005	Norman
Products	York	OK
Group	Drive	73069