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  • VHC Energy Recovery Ventilators with Enthalpy Wheels and Integrated Heating and Cooling

    Installation, Operation and Maintenance Instructions Manual

    Capacity: 800 to 5,500 cfm Model: VHC-36, VHC-42, VHC-50

    ©2012 Venmar CES Inc.

    IMpoRtant The use of this appendix is specifically intended for a qualified installation and service agency. A qualified in- stallation and service agency must perform all installation and service of these appliances.

    FoR YouR SaFEtY What to do if you smell gas:

    1. Do not touch electrical switches or use any phone in the building.

    2. Extinguish any open flame. 3. Leave the building immediately. 4. Immediately call gas supplier.

    WaRnIng Improper installation, adjustment, alteration, service or maintenance can cause injury or death. Read the instal- lation, operation and maintenance instructions in this appendix thoroughly before installing or servicing this equipment.

    !

  • vces-vHc-iom-1 – vHc-36, 42 & 50 2

    Nomenclature.......................................................................................................................................................................3 Safety.Considerations..........................................................................................................................................................4 General.Information............................................................................................................................................................4

    Unit.Application.Limitations.........................................................................................................................................4 Installation............................................................................................................................................................................4

    Unit.Location.Requirements..........................................................................................................................................4 Roofcurbs.Supplied.by.Venmar.CES.(External.Applications.Only)..............................................................................5 Roofcurbs.Supplied.by.Others.......................................................................................................................................6 Rigging.and.Placing.the.Unit........................................................................................................................................6 Field.Fabricated.Ductwork............................................................................................................................................6 Hood.Installation...........................................................................................................................................................7 Access.Panels..................................................................................................................................................................7 Internal.Packaging.........................................................................................................................................................7 Electrical.Connections....................................................................................................................................................8 Coil.Connections............................................................................................................................................................9 Gas.Connections.............................................................................................................................................................9 Water.Source.Heat.Pump.(WSHP).Water.Piping.and.Connections...........................................................................10 Condensate.Drain.Trap................................................................................................................................................10

    Start-up...............................................................................................................................................................................11 Pre.Start-up.Procedure................................................................................................................................................11 Start-up.Procedure.......................................................................................................................................................11 Optional.Controls.and.Accessory.Sequence.and.Interlocks.......................................................................................12 Frost.Control.................................................................................................................................................................13 Airflow.Balancing........................................................................................................................................................14

    Service.................................................................................................................................................................................15 Quarterly.Maintenance...............................................................................................................................................15 Annual.Maintenance...................................................................................................................................................15 Coils...............................................................................................................................................................................15 Testing.and.Replacement.of.the.Damper.Actuator...................................................................................................16 Motor.and.Blower.Removal.–.Down,.Side.and.End.Supply/Exhaust.........................................................................16 Motor.and.Blower.Service.–.Down,.Side.and.End.Supply/Exhaust...........................................................................16 Motor.Removal.–.Gas.Units.and.Top.Supply/Exhaust................................................................................................17 Blower.Removal.–.Gas.Units.and.Top.Supply/Exhaust...............................................................................................17 Motor.and.Blower.Service.–.Gas.Units.and.Top.Supply/Exhaust...............................................................................17 Belt.Tension.Adjustment.............................................................................................................................................18 Plenum.Fan.and.Motor.Removal................................................................................................................................18 Plenum.Fan.and.Motor.Service...................................................................................................................................19 Cassette.Removal.........................................................................................................................................................19 Cassette.Service............................................................................................................................................................20

    Appendix.A:.Service.Clearance.Dimensions......................................................................................................................21 Appendix.B:.Hood.Installation..........................................................................................................................................25 Appendix.C:.Rigging.Drawing...........................................................................................................................................26 Appendix.D:.Equipment.Data...........................................................................................................................................27 Appendix.E:.Electrical.Data...............................................................................................................................................28 Appendix.F:.Terminal.Control.Diagrams..........................................................................................................................32 Appendix.G:.Standard.Field.Wiring.(FW).Terminals........................................................................................................35 Appendix.H:.Temperature.Rise.Over.Gas.Furnace...........................................................................................................37 Appendix.I:.In-shot.Gas.Burner.Information.for.2:1,.4:1.and.On/Off.............................................................................39 Appendix.J:.VHC-36,.42.and.50.Start-up.Report.and.Checklist.......................................................................................48 Appendix.K:.Troubleshooting...........................................................................................................................................52 Appendix.L:.Electric.Heating.Coil.and.Controls.Information..........................................................................................54 Appendix.M:.Water.Line.Field.Mounted.Options.and.Accessories.................................................................................56 Appendix.N:.Enthalpy.Wheel.Pressure.Drop.vs..Flow.Formulae.and.Curves..................................................................64

    Table of Contents

    Manufacturer reserves the right to discontinue or change specifications or designs without notice or obligation.

  • vces-vHc-iom-1 – vHc-36, 42 &