Weil-McLain Please look on the outside jacket of the boiler for a CP Serial Number.In this example they are represented by the numbers 123456.Manufacture. 8th digit is the year of Manufacture.
The letter D in the Sample represents 1964). B 1965 E 1968 H 1970 K 1973 N Letter Q not used 1978 T 1963 C 1966 F Letter I not used 1971 L 1974 O 1976 R 1979 U 1964 D 1967 G 1969 J 1972 M 1975 P 1977 S 1980 V April May 1980 Sample number 123 D A 123456 1st three digits are the Compressor Part Number. Manufacture. 5th digit is the year of Manufacture. In this sample A represents 1980. A 6th thru 11th digits represent the Unit Identity Number. Carrier Nomenclature Serial Number StyleCarrier Nomenclature Serial Number Style WasThis serial number style was only used during the months of April May 1980. June 1980 to Current Sample number 123 H80 1234567 02 1st three digits Compressor Part 4th digit Month 5th 6th digits Year 80 1980 81 1981 82 1982 The year 2000 started the numerical numbering from 00. Right on through to current date. Unit Identity. 14th 15th digits Factory Code (01OH; 02GA) Carrier, Bryant, Payne, Day Night Recently (last 20 years or so) the first four numbers in the serial number represent the week and year. Previously, it was a complex series of letters and single digits. Coleman Serial numbers prior to April 19921st two numbers are month, then year, then series. After April 1992, 1st two numbers are year, then month, then series. Comfortmaker (International Comfort) Uses the first letter for the month (skipping I) and the first two digits are the year. First Company Service Parts Is one of 4 divisions of First Operations. Harold Hammer at Tech Support (ext5) will answer your questions. Lennox Either the first two or second two digits are the year, it varies by era, but most of them actually have a separate sticker somewhere that has the year printed on it. Carrier Nomenclature Code Included AsPeerless Prior to 1984 there was not a date code included as part of the serial number. Starting in 1984, there was a four digit date code following the serial number that was month and year. Example - JO-12345-1084, this unit was built in October of 1984. Starting in the year 2000, same idea only it was a six digit date code following the serial number that is year and month. Example - 1234567-200105, this would have been build in May of 2001. Anything without the addition to the serial number would have been made before 1984 and would require contact with the factory. Rheem Rudd Weatherking Somewhere in the middle of the serial number will be a letter. TRANE Uses alpha codes in their serial numbers to determine year of manufacture. They started this in 1987 with the letter B and skipped a couple of letters during the years. The first letter of the serial number gives the year of manufacture as follows: O, A80(seventh digit) U82(seventh digit) X84 S86 C88 E90 G92 J94 L96 N1998 R2000 T81(seventh digit) W83 Y85 B87 D89 F91 H93 K95 M97 P1999 Z2001 In 2002 they started their serial numbers with the year it was built. In 2002 the first character of the serial number is 2, in 2003, 3 and so on.
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