Carrier Moduline 37HS Series Installation, Start-up And Service Instructions Manual

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Installation, Start-Up and Service InstructionsCONTENTSPageINTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 1INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Unit Identification . . . . . . . . . . . . . . . . . . . . . . . . . . 1Installation Precautions . . . . . . . . . . . . . . . . . . . . 3General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Unit/Ceiling Coordination . . . . . . . . . . . . . . . . . . . 8Unit-to-Unit Connections . . . . . . . . . . . . . . . . . . . 8Unit Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . 8Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 8• T-BAR CEILING• TEGULAR CEILING• NONACCESSIBLE CEILINGSControls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15• GENERAL• CONTROL ARRANGEMENTS• OPERATING SEQUENCES• CONTROL INSTALLATION• AIRFLOW ADJUSTMENT• FUNCTIONAL CHECKOUTSTART-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Principles of Operation . . . . . . . . . . . . . . . . . . . . 28Preliminary System Check . . . . . . . . . . . . . . . . . 29Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 29SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Gaining Access to Control Area . . . . . . . . . . . . . 29TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 29General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Checking for Obstruction . . . . . . . . . . . . . . . . . . 29Checking for Leaks . . . . . . . . . . . . . . . . . . . . . . 29To Check Duct Pressure . . . . . . . . . . . . . . . . . . . 30INTRODUCTIONModuline® units are integral diffuser air terminals. Theyare available with various control devices for constant vol-ume and variable volume heating and cooling applications.All units consist of a plenum, valve assembly and dif-fuser. A typical unit is shown in Fig. 1. The plenum is ther-mally and acoustically insulated and contains a distributionbaffle to provide well-distributed flow to the valve assembly.Fig. 2 shows a cross section of a typical 37HS unit.The valve assembly includes the bellows, which is in-flated in proportion to the duct pressure to regulate airflowto the space. The bellows is constructed of durable polyure-thane. The assembly is connected at either end to 1⁄ 4-in. ODcontrol tubing.The diffuser assembly is available in a 2-slot, one- or 2-wayblow configuration. A 3-slot director diffuser is available foruse in cooling/heating applications.The standard diffuser assembly is not removable. Controlaccess is made through a ceiling opening (e.g., a removableceiling tile) or nearby light fixture. The 37HS Moduline ter-minal is also available with a removable diffuser for instal-lation in nonaccessible ceilings.INSTALLATIONUnit Identification — Units are factory-shipped one percarton. Compare unit nameplate with model number nomen-clature shown in Fig. 3 to be sure correct unit has beenreceived.VALVEASSEMBLYPLENUMCENTERDIFFUSERSIDE DIFFUSERSFig. 1 — Typical 37HS Moduline Air TerminalFig. 2 — Typical 37HS ModulineUnit Cross Section37HSModuline® Air TerminalsManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 3Tab 6aPC 201 Catalog No. 533-710 Printed in U.S.A. Form 37HS-1SI Pg 1 3-91 Replaces: New