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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 239500 - MULTI - INDOOR VRV SYSTEM <br />3.03 REFRIGERANT PIPING <br />The system shall be capable of refrigerant piping up to 540 actual feet or 620 equivalent feet <br />from the condensing unit to the furthest indoor unit, a total combined liquid line length of 3,280 <br />feet of piping between the condensing and indoor units with 295 feet maximum vertical differ- <br />ence, without any oil traps or additional components. <br />REFNET'' piping joints and headers shall be used to ensure proper refrigerant balance and flow <br />for optimum system capacity and performance. T style joints shall not be acceptable as this will <br />negatively impact proper refrigerant balance and flow for optimum system capacity and perfor- <br />mance. <br />3.04 DESIGN BASIS <br />The HVAC equipment basis of design is Daikin North America. All bidders shall furnish the min- <br />imum system standards as defined by the base bid model numbers, model families or as other- <br />wise specified herein (see Key General Specifications Alternate Supplier Checklist). In any <br />event, the contractor shall be responsible for all specified items and intents of this document <br />without further compensation. <br />Part 4 - PRODUCTS <br />4.01 CONDENSING UNIT <br />A. General: The condensing unit is designed specifically for use with VRV se- <br />ries components. <br />1. The condensing unit shall be factory assembled in the USA and pre -wired <br />with all necessary electronic and refrigerant controls. The refrigeration <br />circuit of the condensing unit shall consist of Daikin inverter scroll com- <br />pressors, motors, fans, condenser coil, electronic expansion valves, sole- <br />noid valves, 4 -way valve, distribution headers, capillaries, filters, shut off <br />valves, oil separators, service ports and refrigerant accumulator. <br />Liquid and suction lines must be individually insulated between the condensing and in- <br />door units. <br />2. The condensing unit can be wired and piped with access from the left, <br />right, rear or bottom. <br />3. The connection ratio of indoor units to condensing unit shall be permitted <br />up to 200 %. <br />4. Each condensing system shall be able to support the connection of up to <br />64 indoor units dependent on the model of the condensing unit. <br />5. The sound pressure level standard shall be that value as listed in the Dai- <br />kin engineering manual for the specified models at 3 feet from the front of <br />the unit. The condensing unit shall be capable of operating automatically <br />at further reduced noise during night time or via an external input <br />6. The system will automatically restart operation after a power failure and <br />will not cause any settings to be lost, thus eliminating the need for repro- <br />gramming. <br />7. The unit shall incorporate an auto - charging feature to ensure optimum <br />performance. Manual changing should be support with a minimum of 2 <br />hours of system operation data to ensure correct operation <br />8. The condensing unit shall be modular in design and should allow for side - <br />by -side installation with minimum spacing. <br />9. The following safety devices shall be included on the condensing unit; <br />high pressure sensor and switch, low pressure switch, control circuit fus- <br />Reece, Noland & McElrath, Inc. 239500-7 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />