Optional Outdoor AIR

(Shall be made available by either/or):

1.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 ºF. 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.

2.DUAL INPUT DIFFERENTIAL ELECTRONIC ENTHALPY AUTOMATIC ECONOMIZER - Outdoor and return air dampers that are interlocked and positioned by a fully-modulating, spring-return damper actuator. The maximum leakage rate for the outdoor air intake damp- ers 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 minimum ven- tilation requirement of the conditioned space during nor- mal operation. During economizer 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 ºF. Changeover from compressor to economizer operation shall be pro- vided by two integral electronic enthalpy controls - one that senses outdoor air and one that senses indoor air. Both enthalpy sensors supply input to the logic module which modulates both sets of dampers for maximum economizer savings. The outdoor intake opening shall be covered with a rain hood that matches the exterior of the unit. Water eliminator/filters shall be provided. Simul- taneous economizer/compressor operation is also possi- ble. Dampers shall fully close on power loss.

OTHER PRE-ENGINEERED ACCESSORIES AVAIL- ABLE

1.ROOF CURB - 14" AND 8" high, full perimeter knock- down curb with hinged design for quick assembly.

2.MANUAL OUTDOOR DAMPER - Provides 0% through 35% or 0% through 100% outdoor air capability (field adjustable). Designed for duct mounted side supply/ return applications. Includes a hood and a screen assembly.

3.OUTDOOR COIL GUARD - Prevents coil damage.

4.BAROMETRIC RELIEF DAMPER - Contains a rain hood, air inlet screen, exhaust damper and mounting hardware. Used to relieve internal air pressure through the unit during economizer operation.

5.PROPANE CONVERSION KIT - Contains new orifices and gas valve regulator to convert from natural to L.P. gas.

6.LOW NOX - Required to reduce the emission of nitrogen oxides below 40 nano grams per joule.

7.HIGH ALTITUDE - NATURAL GAS - Required for appli- cations between 2000 and 6000 feet altitude.

8.HIGH ALTITUDE - PROPANE GAS - Required for appli- cations between 2000 and 6000 feet altitude. Must be used with propane conversion kit.

9.GAS PIPING - Contains pipe nipples, fittings and gas cock (including panel assess gaskets) required for bot- tom gas supply connection with external shut-off.

10.BURGLAR BARS - Designed to work with above roofcurbs. Fits duct openings of curb supply and return air openings.

11.THERMOSTATS - Multiple models available from A.C.O., M.C.O., Electronic or Electrical Mechanical ver- sions.

12.ANTI-RECYCLE TIMER - Assures 5-minute off-time between compressor cycles.

13.LOW AMBIENT KIT - Provides unit cooling operation down to 0 ºF.

14.ELECTRIC HEAT - Slide-in design, provides single point power and ranges from 5 to 30 KW.

OTHER FACTORY INSTALLED OPTIONS

1.HIGH PERFORMANCE BELT DRIVE MOTOR

2.TECHNICOAT PHENOLIC COATED COND. COIL

3.ELECTRONIC ENTHALPY ECONOMIZER

4.DUAL INPUT ELECTRONIC ENTHALPY ECONO- MIZER

Subject to change without notice. Printed in U.S.A.		036-21411-002-A-0204
Copyright © 2004 by Unitary Products Group. All rights reserved.		Supersedes: 036-21411-001-A-0502

Unitary	5005	Norman
Products	York	OK
Group	Drive	73069

D1EG, D1EE036 specifications

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