McQuay Skyline IM 777-2 Installation Manual

Installation and Maintenance Manual IM 777-2Skyline™ Air HandlerGroup: Applied AirSizes 003–090Part Number: IM 777Date: July 2007© 2007 McQuay Interna

10 McQuay IM 777-2Installation GuidelinesFace and Bypass Section MountingInternal and external face and bypass sections are mounted together using the

McQuay IM 777-2 11Installation Guidelines•Use care when piping the system, making sure all joints are tight and all lines are dry and free of foreign

12 McQuay IM 777-2Installation GuidelinesFigure 19: Piping ArrangementsVacuum breaker1/2" check valveSteam main1/4" petcockfor continuousair

McQuay IM 777-2 13Installation GuidelinesWater Heating Coils• Water supply and water return connections extend through the end panel of the coil secti

14 McQuay IM 777-2Installation GuidelinesInternal Isolation Assembly AdjustmentOn units with internally isolated fan and motor assemblies, the assembl

McQuay IM 777-2 15Installation GuidelinesElectrical InstallationWiring• Electrical service to the fan must correspond to the rated voltage on the moto

16 McQuay IM 777-2Operation GuidelinesOperation GuidelinesStartup Checks When performing startup and service, always take thorough safety precautions.

McQuay IM 777-2 17Operation GuidelinesNote – Variable pitch fan drives usually are provided for operation in the mid-speed adjustment range. However,

18 McQuay IM 777-2Operation GuidelinesFigure 27: Wheel-to-Inlet Funnel Relationship—Inline FansTable 5: Wheel-to-Inlet Funnel Relationship—Inline Fans

McQuay IM 777-2 19Operation GuidelinesOperating LimitsDo not exceed the operating limits in Table 7. A fan wheel operated beyond the rpm and temperatu

ContentsGeneral Information . . . . . . . . . . . . . . . . . . . . . . . . . 3Receiving and Handling. . . . . . . . . . . . . . . . . . . . . 3Unit

20 McQuay IM 777-2Operation GuidelinesFigure 30: Torque for FC Variable Inlet Vanes (in–lb)Figure 31: Torque for AF Variable Inlet Vanes (in–lb)300250

McQuay IM 777-2 21Operation GuidelinesFigure 32: Torque Requirements at 100% WOV forSWSI Plenum Fans with NESTED Inlet VaneFan Vibration LevelsEach un

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

McQuay IM 777-2 23Service and MaintenanceVM and VP Variable Pitch Key Type SheavesMounting1 Mount all sheaves on the motor or driving shaft with the s

24 McQuay IM 777-2Service and MaintenanceLVP Variable Speed SheavesMounting1 Slide sheave on motor shaft so that the side of the sheave with setscrew

McQuay IM 777-2 25Service and MaintenanceMVP Variable Speed Sheaves Mounting:1 Verify both driving and driven sheaves are in alignment and the shafts

26 McQuay IM 777-2Service and MaintenanceFigure 36: Sheave AdjustmentFan Drive Belt AdjustmentGeneral Rules of Tensioning1 The ideal tension is the lo

McQuay IM 777-2 27Service and MaintenanceFront Load Filter OptionFront loaded filter options require that the filters be removed and replaced from ins

28 McQuay IM 777-2Service and MaintenanceMaintaining the Coil1 The coil must be clean to obtain maximum performance. Check once a year under normal op

McQuay IM 777-2 29Service and MaintenanceRemoving the Fan Assembly1 Remove the side panels and any intermediate supports (follow instructions for side

McQuay IM 777-2 3General InformationGeneral InformationThe system design and installation must follow accepted industry practice as described in the A

30 McQuay IM 777-2Service and MaintenanceRemoving Stacked CoilsNote – Top and bottom stacked coils are held together with steel plate and screws on on

McQuay IM 777-2 31WarrantyWarrantyConsult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay R

© 2007 McQuay International • www.mcquay.com • 800-432-1342McQuay Training and DevelopmentNow that you have made an investment in modern, efficient Mc

4 McQuay IM 777-2Installation GuidelinesInstallation GuidelinesService ClearancesIn addition to providing adequate space around the unit for piping co

McQuay IM 777-2 5Installation GuidelinesCurb Mounting and Unit LevelingDo not place a Skyline unit over an open curb unless it is equipped with a curb

6 McQuay IM 777-2Installation GuidelinesFigure 6: Remove Vestibule Lifting BracketFigure 7: Fasten Bottom of SectiondHandle units with curb-ready base

McQuay IM 777-2 7Installation GuidelinesOnce the side panel is off, remove the flat head Torx 30 fasteners in the corner of the frame channels. Then p

8 McQuay IM 777-2Installation GuidelinesInjected-Foam Insulated Panels Skyline air handlers now are furnished with double-wall, injected-foam insulate

McQuay IM 777-2 9Installation GuidelinesIf the unit has a top mixing box or economizer damper or a top duct connection, field fabricate and install fl