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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 239500 — MULTI - INDOOR VRV SYSTEM <br />way valve, distribution headers, capillaries, filters, shut off valves, oil separators, service <br />ports and refrigerant accumulator. <br />4. Liquid and suction lines must be individually insulated between the condensing and in- <br />door units. <br />5. The condensing unit can be wired and piped with access from the left, right, rear or bot- <br />tom. <br />6. The connection ratio of indoor units to condensing unit shall be permitted up to 200% of <br />nominal capacity. <br />7. Each condensing system shall be able to support the connection of up to 64 indoor units <br />dependent on the model of the condensing unit. <br />8. The sound pressure level standard shall be that value as listed in the Daikin engineering <br />manual for the specified models at 3 feet from the front of the unit. The condensing unit <br />shall be capable of operating automatically at further reduced noise during night time or <br />via an external input. <br />9. The system will automatically restart operation after a power failure and will not cause <br />any settings to be lost, thus eliminating the need for reprogramming. <br />10. The unit shall incorporate an auto - charging feature to ensure optimum performance. <br />Manual changing should be support with a minimum of 2 hours of system operation data <br />to ensure correct operation. <br />11. The condensing unit shall be modular in design and should allow for side -by -side installa- <br />tion with minimum spacing. <br />12. The following safety devices shall be included on the condensing unit; high pressure sen- <br />sor and switch, low pressure sensor, control circuit fuses, crankcase heaters, fusible <br />plug, overload relay, inverter overload protector, thermal protectors for compressor and <br />fan motors, over current protection for the inverter and anti - recycling timers. <br />13. To ensure the liquid refrigerant does not flash when supplying to the various indoor units, <br />the circuit shall be provided with a sub - cooling feature. <br />14. Oil recovery cycle shall be automatic occurring 2 hours after start of operation and then <br />every 8 hours of operation. Each system shall maintain continuous heating during oil re- <br />turn operation. <br />15. The condensing unit shall be capable of heating operation at -13 °F ( -25 °C) wet bulb am- <br />bient temperature without additional low ambient controls or an auxiliary heat source. <br />16. The multiple condenser VRV systems shall continue to provide heat to the indoor units in <br />heating operation while in the defrost mode. <br />B. UNIT CABINET: <br />Reece, Noland & McElrath, Inc. 239500-25 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />