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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 239500 - MULTI - INDOOR VRV SYSTEM <br />Model Number <br />Sound Pressure Level dB (A) <br />RXYQ72TYDN <br />58 <br />RXYQ96TYDN <br />61 <br />RXYQ120TYDN <br />61 <br />RXYQ144TYDN <br />64 <br />RXYQ168TYDN <br />65 <br />RXYQ192TYDN <br />63 <br />RXYQ216TYDN <br />64 <br />RXYQ240TYDN <br />64 <br />RXYQ264TYDN <br />66 <br />RXYQ288TYDN <br />67 <br />RXYQ312TYDN <br />68 <br />RXYQ336TYDN <br />68 <br />RXYQ360TYDN <br />66 <br />RXYQ384TYDN <br />68 <br />RXYQ408TYDN <br />68 <br />5. The fan motor shall have inherent protection and permanently lubricated <br />bearings and be mounted. <br />6. The fan motor shall be provided with a fan guard to prevent contact with <br />moving parts. <br />7. Night setback control of the fan motor for low noise operation by way of <br />automatically limiting the maximum speed shall be a standard feature. <br />Operation sound level shall be selectable from 3 steps. <br />D. Condenser Coil: <br />1. The condenser coil shall be manufactured from copper tubes expanded <br />into aluminum fins to form a mechanical bond. <br />2. The heat exchanger coil shall be of a waffle louver fin and rifled bore tube <br />design to ensure high efficiency performance. <br />3. The heat exchanger on the condensing units shall be manufactured from <br />Hi -X seamless copper tube with N -shape internal grooves mechanically <br />bonded on to aluminum fins to an a -Pass Design. <br />4. The fins are to be covered with an anti - corrosion Ulta Gold coating as <br />standard with a salt spray test rating of 1000hr(ASTM 13117), Acetic acid <br />salt spray test: 500hr(ASTM G85) <br />5. The pipe plates shall be treated with powdered polyester resin for corro- <br />sion prevention. <br />6. The condensing unit shall be factory equipped with condenser coil guards <br />on all sides. <br />Compressor: <br />1. The Daikin inverter scroll compressors shall be variable speed (PVM in- <br />verter) controlled which is capable of changing the speed to follow the <br />variations in total cooling and heating load as determined by the suction <br />gas pressure as measured in the condensing unit. The target suction <br />pressure should be capable of automatic reset based on outdoor temper- <br />ature and system load to improve efficiency. In addition, samplings of <br />evaporator and condenser temperatures shall be made so that the <br />high /low pressures detected are read every 20 seconds and calculated. <br />Reece, Noland & McElrath, Inc. 239500-9 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />