If the manufacture date is not visible on the condenser, you can always locate the brand, model and serial number on the plate, which will help to determine the age of the unit. Manufacturing Date. To discover a unit’s manufacture date, you will need to learn how to interpret the serial or model number. Websites such as BuilderCenter.org The McQuay company and brand, including their range of air conditioning and chiller units, was acquired by Daikin in 2006 and we and our distributors now provide full support for McQuay spare parts and product information. The McQuay company was originally founded in 1933 in Minneapolis, USA. After combining with Daikin in 2006 and acquiring 2) Look for a sheet taped to the front of the air handler (indoor unit), where the HVAC contractor has listed the performance data for the system. 3) Some manufacturers encode the SEER rating in the beginning of the model number on the data plate of the condenser. For example, the “XC21” at the beginning of the model number of the Lennox Directory ofCertified Product Performance. Search By: AHRI Reference #. Model Number. Product Type. Additional Resources. User Guide and FAQs. Daikin’s VRV IV-S Series is available in smaller 3, 4 and new 5-ton capacities with a 208-230V, single phase power supply. Daikin’s Multi Zone Systems are ideal for multi-room applications desiring individual room comfort in a space-saving design. SEER LEVEL Up to 18 HSPF COP 10.5 4.3 COVERAGE 2–10 Zones SEER LEVEL Up to 17.9 HSPF COP Eventually they will all be gone but, in the meantime, here’s the serial number code: look for a single letter in the center of the serial number, which will denote the year of manufacture. We suspect that the adjacent two numbers are the month, but not sure. A = 1973, B = 1974, C = 1975, D = 1976, E = 1977, F = 1978, G = 1979, H = 1980, J 4vMAEL.

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