Guide Specifications Ð 580D036-150

GUIDE SPECIFICATIONS Ð 580D036-150 (cont)

b. Damper shall close upon indoor (evaporator) fan shutoff.

c. Designed to close damper during loss of power situations.

d. Equipped with 15% barometric relief damper.

*5. 25% Two-Position Damper:

a.Two-position damper package shall include single blade damper and motor. Admits up to 25% out- door air.

b.Damper shall close upon indoor (evaporator) fan shutoff.

c.Designed to close damper during loss of power situations.

d.Equipped with barometric relief damper.

*6. Solid-State Enthalpy Control:

a.For use with variable sliding plate economizer package only.

b.Capable of sensing outdoor-air heat content (tem- perature and humidity) and control economizer cut-in point to have minimum heat content air passing over the evaporator coil for most ef®cient system operation.

*7. Differential Enthalpy Sensor:

a.For use with economizer only.

b.Capable of comparing heat content (temperature and humidity) of outdoor air and return air and controlling economizer cut-in point at the most economical level.

*8. Head Pressure Control Package:

Consists of solid-state control and condenser-coil temperature sensor to maintain condensing tem- perature between 90 F and 110 F at outdoor ambient temperatures down to −20 F by condenser-fan speed modulation or condenser-fan cycling.

9. LP (Liquid Propane) Gas Conversion Kit:

*11. Flue Shield:

Provides protection from the hot sides of the gas ¯ue hood.

*12. Thermostat and Subbase:

Provides staged cooling and heating automatic (or manual) changeover, fan control, and indicator light.

*13. Condenser Coil Hail Guard Assembly:

Hail guard shall protect against damage from hail and ¯ying debris.

14.NOx Reduction Kit:

Package shall contain all necessary hardware and instructions to convert a standard natural gas unit to

reduce the nitrous oxide (NOx) emissions to a level of 40 nanograms/joule or less for unit sizes 036-060 being installed in California Air Quality Management Districts.

15.Controls Upgrade Kit:

Kit shall contain high-pressure, loss-of-charge/low- pressure, and freeze protection switches. It shall mount on factory-installed Schrader ®ttings.

16.Alternate Motor(s) and/or Drive(s) (036-060, 090, 120, 150):

Alternate motor(s) and drive(s) shall be factory- installed to provide additional performance range.

17.Flue Discharge De¯ector:

Flue discharge de¯ector directs unit exhaust verti- cally instead of horizontally.

*18. Condenser Coil Grille:

The grille protects the condenser coil from damage by large objects without increasing unit clearances.

19.Compressor Cycle Delay:

Unit shall be prevented from restarting for minimum of 5 min. after shutdown.

20.Thru-the-Bottom Service Connectors:

Package shall contain all the necessary hardware and instructions to convert a standard natural gas unit for use with lique®ed propane gas.

Kit shall provide connectors to permit gas and elec- trical connections to be brought to the unit through the basepan.

* 10. Commercial Programmable Thermostat:	21. Fan/Filter Status Switch:

Seven-day commercial progammable thermostat shall be capable of auto-changeover, F/C, 3-stage heating and 2-stage cabling. Thermostat shall also be equipped with complete system status display.

Provides status of indoor (evaporator) fan (ON/OFF) or ®lter (CLEAN/DIRTY). Status shall be displayed over communication bus when used with direct digital controls or with an indicator light at the thermostat.