Make-Up Air Units - Trane

1 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.

2 Componentparts are of the highest quality. Each unithas overlapping, fail-safe protectiondevices to handle failures should theyoccur. Each unit is factory tested before itships, and is designed to provide yearsof reliable, low maintenance are built with UL approvedcomponents, where applicable. Specialgas controls can be furnished to complywith FM or IRI Use Trane Make-Up Air Units ?3 ContentsMUA-PRC001-ENIntroductionFeature s and BenefitsUnit ConfigurationsApplication ConsiderationsModel Number DescriptionPerformance DataGas PipingControlsElectric PowerDimension and WeightsMechanical SpecificationsOptionsAccessories24678911 161819363743 MUA-PRC001-EN4 Features andBenefits Optional inlet damper wtih V-bank filter Supply air intake view showing inlet hoodand birdscreen Gas burner section Factory assembled gas manifoldcompartment Access compartment to control panel andfan : Fan motor panel has been removed for andBenefitsBasic UnitFeature:Casing with galvanized finishBenefit:Rust problem is greatly reducedFeature:Watertight constructionBenefit.

3 Designed for indoor or outdoormountingFeature:Access doors are hinge mounted withindustrial type hardwareBenefit:Provides simple access to servicecompartments without removing sheetmetal screws and panelsFeature:Adjustable motor mountBenefit:Belt tension can be field adjusted formaximum belt life and for motor speedadjustmentFeature:Basic unit is factory assembled andwiredBenefit:Reduces field installation costFeature:All fuses factory furnishedBenefit:Delay at start-up eliminatedFeature:Factory tested before being shippedBenefit:Eliminates majority of field start-upproblems caused by defective controlsFeature:No flues or stacks are usedBenefit:Eliminates backdraft and dangerouscontaminants from entering the spaceGas-Fired UnitFeature:Many standard, natural gas burningunits bear the ETL label.

4 Contactfactory for :Meets certain insurance requirementsFeature:Optional temperature control systemsavailableBenefit:Select system to satisfy applicationFeature:Optional dual fuel gas manifoldBenefit:Standby flexibility in case natural gassupply is interruptedFeature:Optional construction provides returnair cycleBenefit:Maximum 80 percent return air cycleresults in fuel economy for pressurizedheating systems and eliminates need fortwo-speed fan operation. Minimizesheating ConfigurationsFor all arrangements shown, the gaspiping and controls are on the near horizontal Units are availablewith special options cooling coils (DX,chilled water), steam and electric coils,no burner ConfigurationsFor all arrangements shown, the gaspiping and controls are on the near electric control cabinet (EC) anddisconnect are on the side opposite theair entering side.

5 Selected vertical unitsare available with special options steam and electric coils, no UnitsOutdoor Make-Up air Units are the mostcommon approach to relieving negativepressure inside commercial andindustrial facilities. All Units offer theadvantage of a full support system thatis watertight, provides a plenum forreturn air, and has easily accessiblepiping and electrical Need for Make-Up Air UnitsWhen more air is exhausted from abuilding than is supplied by themechanical systems, the building isunder a negative condition. Air willleak into the building through cracks,windows, and doors. When a negativecondition exists:1 Flues and stacks may experience abackdraft and cause dangerouscontaminants to remain in the occupiedspace.

6 In the case of flues, the productsof combustion may condense andcorrode the negative conditions, the exhaustsystem sees a greater static capacity of each fan is reduced andthis results in an inadequate removal and cross-currents will increase ina negative condition, causing anuncomfortable or unhealthy Fuel to Use?The most common fuel for heatingmake-up air is natural gas. This isbecause 100 percent of the energy goesinto the air stream (92 percent sensible, 8percent latent). Direct firing eliminatesthe need for heat exchangers orcombustion chambers that can corrodeor leak. Natural gas is often the leastexpensive fuel and is usually : Selected horizontal and verticalunits are available with special coiloptions (DX, chilled water, steam orelectric).

7 MUA-PRC001-EN8 ModelNumberDescriptionD F O A 1 0 9 A N C A 1 A A B 1 2 0 0 0 A 1,2,3 4 5,6,7 8 9 10 11 12 13,14 15 16 17 18 19 20 21 Digits 1,2,3 unit DescriptionDFO = Direct Fired Outdoor UnitDigit 4 Development SequenceA = First GenerationDigits 5,6,7 unit Size109 = unit Size 109112 = unit Size 112115 = unit Size 115118 = unit Size 118215 = unit Size 215218 = unit Size 218220 = unit Size 220222 = unit Size 222225 = unit Size 225230 = unit Size 230 SSS = Special unit SizeDigit 8 Main Power Supply0 = No SelectionA = 115/60/1B = 230/60/1C = 208/60/1D = 208/60/3E = 230/60/3F = 460/60/3S = SpecialDigit 9 FuelN = Natural GasP = LP Gas (Propane)

8 S = SpecialDigit 10 Design SequenceC = Third DesignDigit 11 Gas Control OptionA = Series 14 Constant Discharge TemperatureB = Series 44 Space Temperature ControlS = SpecialDigit 12 Type Gas Train Approvals1 = Standard3 = IRI4= FMS = SpecialDigits 13,14 Burner Input Rating (MBh)AA = 275 MBh InputAB = 550 MBh InputAC = 825 MBh InputAD = 990 MBh InputAE = 1100 MBh InputAF = 1375 MBh InputAG = 1650 MBh InputAH = 1925 MBh InputAJ = 2200 MBh InputAK = 2475 MBh InputAL = 2750 MBh InputAN = 3025 MBh InputAP = 3300 MBh InputAQ = 3575 MBh InputAR = 3850 MBh InputAT = 4125 MBh InputAV = 4400 MBh InputAW = 4675 MBh InputAX = 4950 MBh InputAY = 5225 MBh InputAZ = 5500 MBh InputA1 = 5775 MBh InputA2 = 6050 MBh InputA3 = 6325 MBh InputA4 = 6600 MBh InputA5 = 6875 MBh InputA6 = 7150 MBh InputA7 = 7425 MBh InputA8 = 7700 MBh InputA9 = 7975 MBh InputSS = SpecialDigit 15 Blower Motor HP0

9 = No SelectionB = HP MotorC = 1 HP MotorD = 1 HP MotorE = 2 HP MotorF = 3 HP MotorG = 5 HP MotorH = 7 HP MotorJ = 10 HP MotorK = 15 HP MotorL = 20 HP MotorM = 25 HP MotorP = 30 HP MotorQ = 40 HP MotorR = 50 HP MotorT = 60 HP MotorS = SpecialDigit 16 Motor Speed and Starter0 = No Selection1 = Single Speed ODP 1800 RPM2 = Single Speed TEFC 1800 RPM3 = Single Speed Energy Efficient ODP 1800 RPM4 = Single Speed Energy Efficient TEFC 1800 RPM5 = 2S1W ODP 1800/900 RPM6 = 2S2W ODP 1800/1200 RPMS = SpecialDigit 17 Fan Discharge*Horizontal Arrangement1 = Arrangement 1, Top2 = Arrangement 2, Side3 = Arrangement 3, Bottom*Select arrangements from page Arrangement4 = Arrangement 4, Side5 = Arrangement 5, Top6 = Arrangement 6.

10 Side*Select arrangements from page 18 Inlet Hood and Birdscreen0 = NoneA = Inlet Hood and Birdscreen with Permanent FiltersB = Inlet Hood and Birdscreen without FiltersDigit 19 V-Bank Filter Section0 = No SelectionA = V-Bank Filter Section with Permanent FiltersB = V-Bank Filter Section without FiltersDigit 20 Dampers/Mixing Box0 = No SelectionA = Motorized RA DamperB = Motorized 75/25 DamperC = Mixing Box Temperature ControlD = Mixing Box Building Pressure ControlE = Mixing Box Manual ControlDigit 21 Miscellaneous OptionsA = Controls Opposite from StandardB = Motorized Inlet DamperC = Motorized Outlet DamperD = Insulation on Basic FrameE = Insulation on Filter SectionF = Internal Blower/Motor IsolationG = Extended Grease LinesH = Inlet On-Off Duct StatK = 115V Duplex Service Receptacle with Power TransformerL = Circuit AnalyzerM = Painted Basic unit and AccessoriesN = UV Flame SensorP = Clogged Filter Switch with LightQ = Exhaust InterlockR = Interlocking RelayT = City of Chicago ControlsV = Omit Disconnect SwitchW = High Gas Pressure Regulator 1-5 PSIGX = High Gas Pressure Regulator 5-10 PSIGY = Adjustable DriveS = Special8 = Low Gas Pressure Burner9 MUA-PRC001-ENPerformanceDataTable PD-1 Direct-Fired Outdoor UnitCFMFPM Total External Static Pressure (WC)