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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 239500 - MULTI - INDOOR VRV SYSTEM <br />RXYQ168TYDN <br />14 <br />29 <br />RXYQ192TYDN <br />16 <br />33 <br />RXYQ216TYDN <br />18 <br />37 <br />RXYQ240TYDN <br />20 <br />41 <br />RXYQ264TYDN <br />22 <br />45 <br />RXYQ288TYDN <br />24 <br />49 <br />RXYQ312TYDN <br />26 <br />54 <br />RXYQ336TYDN <br />28 <br />58 <br />RXYQ360TYDN <br />30 <br />62 <br />RXYQ384TYDN <br />32 <br />64 <br />RXYQ408TYDN <br />34 <br />64 <br />4.01 VRV IV FEATURES AND BENEFITS <br />A. Voltage Platform - Heat pump condensing units shall be available with a 460V/3/60 <br />power supply. <br />B. Advanced Zoning - A single system shall provide for up to 64 zones. <br />C. Independent Control - Each indoor unit shall use a dedicated electronic expansion <br />valve with 2000 positions for independent control. <br />D. VFD Inverter Control and Variable Refrigerant Temperature - Each condensing unit <br />shall use high efficiency, variable speed all "inverter" compressor(s) coupled with in- <br />verter fan motors to optimize part load performance. The system capacity and refrig- <br />erant temperatures shall be modulated automatically to set suction and condensing <br />pressures while varying the refrigerant volume for the needs of the cooling or heating <br />loads. The control will be automatic and customizable depending on load and weath- <br />er conditions <br />E. Indoor units shall use PID to control superheat to deliver a comfortable room tem- <br />perature condition and optimize efficiency. <br />F. Configurator software - Each system shall be available with configurator software <br />package to allow for remote configuration of operational settings and also for as- <br />sessment of operational data and error codes. <br />G. Autocharging - Each system shall have a refrigerant auto - charging function <br />H. Flexible Design - <br />1 . Systems shall be capable of up to 540ft (640ft equivalent) of linear piping be- <br />tween the condensing unit and furthest located indoor unit. <br />2. Systems shall be capable of up to 3,280ft total `one -way" piping in the piping <br />network. <br />3. Systems shall have a vertical (height) separation of up to 295ft between the <br />condensing unit and the indoor units <br />4. Systems shall be capable of up to 295ft from the first REFNETT" / branch <br />point. <br />5. The condensing unit shall have the ability to connect an indoor unit evapora- <br />tor capacity of up to 200% of the condensing unit capacity. <br />6. Systems shall be capable of 1 00f vertical separation between indoor units. <br />7. Condensing units shall be supported with a fan motor ESP up to 0.32" WG as <br />standard to allow connection of discharge ductwork and to prevent discharge air <br />short circuiting. <br />I. Oil Return - Each system shall be furnished with a centrifugal oil separator and ac- <br />tive oil recovery cycle <br />J. Simple Wiring - Systems shall use 16/18 AWG, 2 wire, multi- stranded, non - shielded <br />and non - polarized daisy chain control wiring. <br />Reece, Noland & McElrath, Inc. 239500-3 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />