Lettered Model Numbers - ClimateMaster

Lettered Model Numbers A Model number starting with two or three letters followed by the size of the unit has been used extensively and is current nomenclature policy. The first two letters designate the Model series. The third letter is normally used for the unit configuration: vertical upflow (V), horizontal (H), and down discharge (D). The next three digits (sometimes only two) after Model series is the unit cooling capacity in thousands of BTUH. 036 is 36,000 BTUH. A ton is 12,000 BTUH, some the 036 is a three-ton unit.

mounting system, blower housing and Air Handler compartment ... LOAD = heat exchanger used as evaporator in cooling, condenser in heating LWT = leaving water temperature, °F MBTUH = 1000 BTU per hour SOURCE = heat exchanger used as condenser in cooling,

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  Temperatures, Evaporator, Leaving

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