Transcription of Make-Up Air Units - Trane
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make -UpAir UnitsDirect-Fired OutdoorModel DFOAMUA-PRC001-ENSeptember 2000 American Standard Inc. 2000 MUA-PRC001-ENIntroductionTo help relieve negative pressure insidecommercial and industrial facilities, suchas factories, garages, packing plants,kitchens, bowling alleys, and weldingand foundry areas. Trane s Make-Up airunits offer a wide range of cfm, from1,600 to 64,000, and gas-fired burnerswith capacities from 131,000 Btuh to7,748,000 Btuh. These ranges offerexcellent variety when selecting a unitthat will fill both the owner s needs andthose of the specifying engineer. Theseunits are flexible in that they can belocated indoors or outdoors, and eithercurb or grade standard Units include the necessarycontrols for operation, such as a flamesafeguard, an air proving differentialswitch, a high temperature limit switch,and an ignition transformer.
The Need for Make-Up Air Units When more air is exhausted from a building than is supplied by the mechanical systems, the building is under a “negative” condition. Air will leak into the building through cracks, windows, and doors. When a negative condition exists: 1
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