McQuay Skyline OAH Series Manual de Instalação Página 1

®Installation and Maintenance Manual IM 777-5Skyline Air HandlerGroup: Applied Air SystemsPart Number: IM 777Date: May 2010© 2010 McQuay Internationa

10 McQuay IM 777Mechanical InstallationFace and Bypass Section MountingInternal and external face and bypass sections are mounted together using the i

McQuay IM 777 11Mechanical InstallationSteam CoilsPiping (see Figure 19)• Steam supply and steam return connections typically are male NPT iron pipe a

12 McQuay IM 777Mechanical InstallationFigure 19: Piping ArrangementsVacuum breaker1/2" check valveSteam main1/4" petcockfor continuousair v

McQuay IM 777 13Mechanical InstallationWater Heating Coils• Water supply and water return connections extend through the end panel of the coil section

14 McQuay IM 777Mechanical InstallationInternal Isolation Assembly AdjustmentOn units with internally isolated fan and motor assemblies, the assemblie

McQuay IM 777 15Mechanical InstallationFigure 23: Removing “Motor Behind” Shipping Brackets Figure 24: Removing “Motor Beside” Shipping BracketsUnit s

16 McQuay IM 777Electrical InstallationElectrical InstallationWiring• Electrical service to the fan must correspond to the rated voltage on the motor

McQuay IM 777 17Operation GuidelinesOperation Guide linesStartup Checks When performing startup and service, always take thorough safety precautions.

18 McQuay IM 777Operation GuidelinesNote: Variable pitch fan drives usually are provided for operation in the mid-speed adjustment range. However, th

McQuay IM 777 19Operation GuidelinesFigure 29: Wheel-to-Inlet Funnel Relationship—40 to 60 Plenum FansTable 6: Wheel-to-Inlet Funnel Relationship—40 t

ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3General Information . . . . . . . . . . . . . . . . . . . . . . .

20 McQuay IM 777Operation GuidelinesOperating LimitsDo not exceed the operating limits in Table 10. A fan wheel operated beyond the rpm and temperatur

McQuay IM 777 21Operation GuidelinesFigure 35: Torque Requirements at 100% WOV forSWSI Plenum Fans with NESTED Inlet VaneFan Vibration LevelsEach unit

22 McQuay IM 777Service and MaintenanceService and MaintenancePeriodic Maintenance1 Check all moving parts for wear every six months.2 Check bearing c

McQuay IM 777 23Service and MaintenanceFan DriveUpon completion of the air balance, replace the variable pitched motor sheave with a properly sized, f

24 McQuay IM 777Service and MaintenanceLVP Variable Speed SheavesMounting1 Slide sheave on motor shaft so that the side of the sheave with setscrew A

McQuay IM 777 25Service and MaintenanceMVP Variable Speed Sheaves Mounting1 Verify both driving and driven sheaves are in alignment and the shafts are

26 McQuay IM 777Service and MaintenanceFigure 38: Sheave AdjustmentFigure 39: Sheave AdjustmentMotorMust beparallelAdjustableSheaveCenter linesmust co

McQuay IM 777 27Service and MaintenanceFan Drive Belt AdjustmentGeneral Rules of Tensioning1 The ideal tension is the lowest tension at which the belt

28 McQuay IM 777Service and MaintenanceFront Load Filter OptionFront loaded filter options require that the filters be removed and replaced from insid

McQuay IM 777 29Service and MaintenanceWinterizing Water CoilsCoils can freeze due to air stratification or failure of outdoor air dampers and/or preh

McQuay IM 777 3IntroductionIntroductionGeneral InformationThe system design and installation must follow accepted industry practice as described in th

30 McQuay IM 777Service and MaintenanceFigure 43: Single Coil Top Installation/RemovalFigure 44: Single Coil Side Installation/RemovalRemoving Stacked

McQuay IM 777 31PartsPartsReplacement PartsWhen writing to McQuay for service or replacement parts, refer to the model number and serial number of the

32 McQuay IM 777Service and Warranty ProcedureService and Warranty P rocedureWarrantyConsult your local McQuay Representative for warranty details. Re

McQuay IM 777 33Check, Test, and Start Procedure FormCheck, Test, and Start Procedure FormTo comply with the terms of McQuay Warranty, complete and re

34 McQuay IM 777Check, Test, and Start Procedure FormPhase L2: ___________ ___________ ____________ ____________ ___________ ___________Phase L3 _____

McQuay IM 777 35Quality Assurance Survey ReportQuality As surance Survey ReportQuality Assurance Survey ReportTo whom it may concern:Please review the

© 2010 McQuay International • www.mcquay.com • 800-432-1342 05/10McQuay Training and DevelopmentNow that you have made an investment in modern, effici

4 McQuay IM 777Mechanical InstallationMechanical InstallationService ClearancesIn addition to providing adequate space around the unit for piping coil

McQuay IM 777 5Mechanical InstallationFigure 4: Leveling the UnitAssembling SectionsIf the unit is shipped in more than one shipping section, rig each

6 McQuay IM 777Mechanical InstallationFigure 7: Fasten Bottom of Sectiond A length of “D” gasket is attached to each section (Figure 7). This gasket M

McQuay IM 777 7Mechanical InstallationPanels, Frame Channels, and DoorsPanel RemovalTo remove a side or top panel, remove the flat head Torx 30 fasten

8 McQuay IM 777Mechanical InstallationInjected-Foam Insulated Panels Skyline air handlers now are furnished with double-wall, injected-foam insulated

McQuay IM 777 9Mechanical InstallationIf the unit has a top mixing box or economizer damper or a top duct connection, field fabricate and install flas