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Accessory Description and Usage (Listed Alphabetically) (Continued) <br /> 10.Support Feet 12.Time—Delay Relay <br /> Four stick—on plastic feet that raise the unit 4 in. (101.6 mm) An SPST delay relay which briefly continues operation of indoor <br /> above the mounting pad.This allows sand,dirt,and other debris blower motor to provide additional cooling after the compressor <br /> to be flushed from the unit base,minimizing corrosion. cycles off. <br /> Usage Guideline: NOTE:Most indoor unit controls include this feature.For those <br /> Suggested in the following applications: that do not,use the guideline below. <br /> Coastal installations. Usage Guideline: <br /> Windy areas or where debris is normally circulating. For improved efficiency ratings for certain <br /> Rooftop installations. combinations of indoor and outdoor units.Refer to <br /> For improved sound ratings. <br /> AHRI Unitary Directory. <br /> 11.Thermostatic Expansion Valve(TXV) 13. Winter Start Control <br /> A modulating flow—control valve which meters refrigerant liquid This control is designed to alleviate nuisance opening of the <br /> flow rate into the evaporator in response to the superheat of the low—pressure switch by bypassing it for the first 3 minutes of <br /> refrigerant gas leaving the evaporator. operation. <br /> Kit includes valve, adapter tubes, and external equalizer tube. <br /> Hard shut off types are available. <br /> NOTE: When using a hard shut off TXV with single phase <br /> reciprocating compressors, a Compressor Start Assist Capacitor <br /> and Relay is required. <br /> Usage Guideline: <br /> Required to achieve AHRI ratings in certain equipment <br /> combinations.Refer to combination ratings. <br /> Hard shut off TXV or LLS required in air conditioner <br /> long line applications. <br /> Required for use on all zoning systems. <br /> 7 <br />